MDX-C7970/C7970R

SERVICE MANUAL

US Model Canadian Model E Model

MDX-C7970

AEP Model UK Model

MDX-C7970R

For RM-X4S (Remote Commander), please refer to RM-X4S Service Manual (9-925-698-) previously issued.

Photo: MDX-C7970R

Model Name Using Similar Mechanism Base Mechanism Type Optical Pick-Up Name
MDX-C7900/C7900R MG-164N-138 KMS-241B/J1NP

SPECIFICATIONS

Continued on next page
FM/AM(MW/LW) MINIDISC PLAYER

MICROFILM

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK Never look into the laser diode emission from right avove when checking it for adustment. It is feared that you will lose your sight. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (KMS-241B/J1NP) The laser diode in the optical pick-up block may suffer electrostatic break-down easily. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform m easures against electrostatic break-down sufficiently before the operation. The flexible board is easily damaged and should be handled with care.

laser-tap

OPTICAL PICK-UP FLEXIBLE BOARD
Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C during repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY.
TABLE OF CONTENTS 1. GENERAL
Location of Controls.. Resetting the Unit... Detaching the Front Panel.. Preparing the Rotary Commander.. Setting the Clock... Using the Rotary Commander.. Adjusting the Sound Characterisitics.. Attenuating the Sound.. Changing the Sound and Display Settings. Boosting the Bass Sound.. Installation... Connections... 7 8
DISASSEMBLY.. 12 ELECTRICAL ADJUSTMENTS
Test Mode.. 18 MD Section... 18 Tuner Section... 18
4-1. 4-2. 4-3. 4-4. 4-5. 4-6. 4-7. 4-8. 4-9. 4-10. 4-11. 4-12. 4-13. 4-14. 4-15. 4-16. 4-17. 4-18. 4-19. 4-20. 4-21.

DIAGRAMS

Block Diagram SERVO Section . Block Diagram TUNER Section .. Block Diagram MAIN Section .. Block Diagram DISPLAY/KEY CONTROL Section . Block Diagram BUS CONTROL/POWER SUPPLY Section . Note for Printed Wiring Boards and Schematic Diagrams.. Printed Wiring Boards SERVO Section . Schematic Diagram SERVO Board (1/3) .. Schematic Diagram SERVO Board (2/3) .. Schematic Diagram SERVO Board (3/3) .. Printed Wiring Board MAIN Board (Component Side) .. Printed Wiring Board MAIN Board (Conductor Side) .. Schematic Diagram MAIN Board (1/4) . Schematic Diagram MAIN Board (2/4) . Schematic Diagram MAIN Board (3/4) . Schematic Diagram MAIN Board (4/4) . Printed Wiring Board DISPLAY Board . Schematic Diagram DISPLAY Board .. Printed Wiring Board SUB Board .. Schematic Diagram SUB Board . IC Pin Function Description.. 69
EXPLODED VIEWS.. 79 ELECTRICAL PARTS LIST. 83

SECTION 1 GENERAL

This section is extracted from instruction manual.

SECTION 2 DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

SUB PANEL ASSY

S501 D-BASS

CNP501 FRONT PANEL SIDE

KEY ACTIVE SWITCH Q905

BACKUP +5V

S901 (NOSE DETECT)

CN901 MAIN BODY SIDE

BUZZER DRIVE Q701

BZ1 (BUZZER)

106 107

D-BASS IN

KEY-IN1

RE-IN0

RE-IN1

KEY-IN0

RC-IN0 RC-IN1

KEYACK

LCD SO LCD CKO LCD CE

X700 3.68MHz

X701 32.768kHz

LED501 505, LSW532, 536

LCD +10V

REGULATOR Q507

R561 OSC

LED DRIVE Q504, 506

LED DRIVE Q503, 505

LSW512 521, 531, LSW533 535, 537, 538 (LSW533: MDX-C7970R only) LED510, 511 (LCD BACK LIGHT)

REGULATOR Q501, 502

CONTRAST SWITCHING Q901

VLC0 VLC5

POWER-ON

LCD-DATA LCD-CLK LCD-CE

OSC OUT
LIQUID CRYSTAL DISPLAY DRIVER IC501 SEG1 SEG90 COM0 COM93
LCD501 LIQUID CRYSTAL DISPLAY

DIM-ON

OSC IN

LCDANG

MASTER CONTROLLER IC700 (3/4)

DOOR-SW

NOSE-SW
BLOCK DIAGRAM BUS CONTROL/POWER SUPPLY Section
CNJ600 REMOTE CONTROL RECEIVER IC502 D605 SIRCS BUFFER Q602
BUS CONTROL IN (FOR SONY BUS) 3 SIRCS
MASTER CONTROLLER IC700 (4/4)

24 SIRCS

(Page 28)

RAM RESET IC802

102 RAMBU D804 D803
CNP500 (2/2) (POWER CONNECTOR) 6 ANT REM
RESET SIGNAL GENERATOR IC801 D916

90 RESET 86 HSTX

+5V (TUNER CIRCUIT B+)
+5V REGULATOR QAMP+B 8 ANT+B
AMP REM 5 BATT B+ POWER AMP (IC500) B+
S900 (RESET) SONY BUS INTERFACE IC600
D3 FM B+ (FM CIRCUIT B+) AM B+ (AM CIRCUIT B+) REGULATOR ICFM8V VCC 7
TUNER B+ 2 RESET 2 RST RESET SWITCH RST SYSRST

10 AM8V

5 DATA 6

DATA IN DATA OUT

21 UNI SO 20 UNI SI 22 UNI CKIO
COM +8V (AUDIO CIRCUIT B+) D802

9 COM8V

4 CLK 6 BUS ON BUS ON SWITCH Q4

CLK IN

5 BU+B STB MODEMODE2 2
BUS ON BUS OUT BUS ON ON IN 12 SWITCH

36 BUS-ON

7 BATT 3

BATTERY BU IN 10 SWITCH

76 BU-IN
PW-ON 109 FM-ON 110 TU-ON 111
D604 D603 D606 BATTERY DETECT Q601 REGULATOR CONTROL SWITCH Q906
LCD +10V LCD DRIVER (IC501)/ ILLUMINATION LED B+

+10V REGULATOR Q903, 904

16 BATT

BATT B+

LAMP ON (ILL ON) 108
MUTE ACC IN 64 ACCESSORY CHECK Q900

D913 D607 D500

7 ACC 14 ILL IN
ILL IN 57 LED891 (MD DISC SLOT) LSWREGULATOR CONTROL SWITCH Q907 LOAD +12V LOADING MOTOR DRIVER (IC305) B+ B+ SWITCH Q402, BU-IN 61 BUS-ON 30 RESET 49 UNISI 48 UNICKIO LEVEL SHIFT QUNISO +3.3V 46 LINKOFF MDMON 10 MD-ON 65 REGULATOR CONTROL SWITCH Q255 VCC

PACK-IND 25

LED891, LSW890

REGULATOR Q908

MD MECHANISM CONTROLLER IC501 (2/2)

+12V REGULATOR Q254

DRIVER +5V MOTOR/COIL DRIVER (IC303) B+ DC/DC CONVERTER IC250
+3.3V REGULATOR IC401, Q401

B+ SWITCH Q250, 251

NOTES FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. : internal component. C : panel designation. U : B+ Line. H : adjustment for repair. Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords. Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. Circled numbers refer to waveforms. Signal path. F : FM f : AM (MW/LW) L : BUS AUDIO IN E : MD PLAY

Circuit Boards Location

SENSOR board
Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. r : Through hole. : internal component. b : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.) Caution: Pattern face side: (Conductor Side) Parts face side: (Component Side) Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.

PRINTED WIRING BOARD MAIN Board (Conductor Side)
Ref. No. D502 IC500 IC800 Q903 Q904 (Page 60) Location C-3 A-7 E-1 H-2 H-3

(Page 35)

4-13. SCHEMATIC DIAGRAM MAIN Board (1/4) See page 67 for Waveforms. See page 65 for IC Block Diagrams.
Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM (MW) [ ] : LW : MD PLAY

(Page 42)

(Page 49)

(Page 53)

(Page 52)
4-14. SCHEMATIC DIAGRAM MAIN Board (2/4)
Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : FM

(Page 48)

(Page 54)
Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM (MW) [ ] : LW
SCHEMATIC DIAGRAM MAIN Board (3/4)
See page 65 for IC Block Diagrams.
SCHEMATIC DIAGRAM MAIN Board (4/4)
See page 66 for IC Block Diagrams.
Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM (MW) [ ] : LW : MD PLAY

(Page 61)

PRINTED WIRING BOARD DISPLAY Board
Semiconductor Location (Component Side)
Ref. No. IC501 LED501 LED502 LED503 LED504 LED505 LED510 LED511 Location B-8 A-3 A-2 B-1 C-2 C-3 B-5 B-11
Semiconductor Location (Conductor Side)
Ref. No. D501 D502 D503 D504 D505 D506 IC502 Q501 Q502 Q503 Q504 Q505 Q506 Q507 Location C-13 B-2 C-12 B-10 B-10 B-10 C-12 B-2 B-2 B-5 B-5 B-6 B-5 B-10

(Page 60)

Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM
SCHEMATIC DIAGRAM DISPLAY Board
See page 68 for Waveform.
PRINTED WIRING BOARD SUB Board

(Page 45)

(Page 56)
SCHEMATIC DIAGRAM SUB Board

(Page 57)

IC Block Diagrams SERVO Board IC101
XTI 1 DGND 2 VDD 3 LRCIN 4 DIN 5 NOISE SHAPER BCKIN 6 ZERO 7 D/C_R 8 VOUTR 9 AGND LEVEL DAC LOWPASS FILTER CMOS AMP 5 LEVEL DAC LOWPASS FILTER CMOS AMP 15 RSTB 14 FORMAT 13 D/C_L 12 VOUTL 11 VCC

PCM1718E/2K

CLK CONTROL INPUT INTERFACE DIGITAL FILTER 20 XTO 19 CLKO MODE CONTROL 18 MUTE 17 DMDM0

CXD2652AR

APCREF F0CNT TEST3 TEST2 TEST1 DVDD DCHG SRDR SPRD EFMO TRDR LDDR DVSS FRDR SFDR ADFG CKRF SPFD DTRF TFDR XLRF FFDR FGIN APC FS4
MNTMNTMNTMNTMONITOR CONTROL EACH BLOCK

SENSE REFRESH AMP INPUT/OUTPUT CONTROL SWITCH (4) OUTPUT BUFFER

19 NC 18 AAAAA4

MEMORY CELL (4194204 BIT)
MAIN Board IC100 TDA7427AD
DOUT2 DOUT1/INLOCK GND-SIG

LP OUT

VDD2 GND-AM AM IN FM IN NC
11 BIT PROGRAMMABLE COUNTER
SUPPLY & POWER ON RESET SWITCH SWM/DIR 5 BIT PROGRAMMABLE COUNTER PRE COUNTER FM/AM SWITCH SWITCH SWM/DIR
CONTROL SWITCH OUT 16 BIT PROGRAMMABLE COUNTER TIMER 14 BIT PROGRAMMABLE COUNTER BIT PROGRAMMABLE COUNTER FM/AM SWITCH

INLOCK DETECTOR

CHARGE PUMP SWITCH LP1/LP2

PHASE COMPARATOR

TEST LOGIC PORT EXTENSION REFERENCE OSCILLATOR IIC BUS INTERFACE

OSCOUT

LP FM LP HC LP AM
SAA6588T-118 (MDX-C7970R)
SCOUT VSSA MPX MAD PSWN VDDA VREF CIN AFIN

DOUT3 DOUT4 DOUT5 DOUT6

NJM2360AM (TE2)

SSTOP IF FM

ADDR HFREF

MRO MPTH

CLOCKED COMPARATOR RDS/RDBS DEMODULATOR TEST CONTROL 3 4

13 PAUSE DETECTOR

CS 1 Q1 ES 2 CT 3 GND 4

S R Ipk CT OSC

8 CD 7 SI 6 V+ 5 INVIN COMP
POWER SUPPLY & RESET 57kHz 8th ORDER BAND-PASS FILTER SIGNAL QUALITY DECODER 4 CLOCK RDS/RDBS DECODER DATA OSCILLATOR & CLOCK INTERFACE REGISTER CLOCK DATA

VREF 1.25V

TDA7462D013TR
SE3L SE3R MUTE SDA SCL PAUSE
PAUSE DETECT INPUT GAIN & AUTO ZERO TREBLE/ BASS CONTROL CIRCUIT FRONT FADER
SE1L SE1R MD+ MD CDL+ CDL CDR CDR+ PDR PDGND PDL SE2L SE2R

FRONT SIDE SELECTOR

LOUDNESS CONTROL CIRCUIT

VOICE BANDPASS HP LP

22 OUT FL
INPUT MULTIPLEXER & MIXING STAGE
FRONT FADER COMPANDER REAR FADER LOUDNESS CONTROL CIRCUIT

21 OUT FR

REAR SIDE SELECTOR

20 OUT RL

INPUT GAIN

REAR FADER

19 OUT RR

SUBWOOFER LP

FADER 18 SUBOUT+ 17 SUBOUT SDA

SUBWOOFER OUT IIC BUS

Pin No. 90 91

Pin Name D1 D0 D2 D3 MVCI ASYO ASYI AVDD BIAS RFI AVSS PDO PCO FILI FILO CLTV PEAK BOTM ABCD FE AUX1 VC ADIO AVDD ADRT ADRB AVSS SE TE AUX2 DCHG APC ADFG F0CNT XLRF CKRF DTRF APCREF LDDR TRDR TFDR DVDD FFDR FRDR FS4 SRDR
I/O I/O I/O I/O I/O I O I (A) I (A) I (A) O (3) O (3) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I O O O O O O O O O O O O Two-way data bus with the D-RAM (IC307)

Function

Digital in PLL oscillation input from the external VCO Not used (fixed at L) Playback EFM full-swing output terminal Playback EFM asymmetry comparator voltage input terminal Power supply terminal (+3.3V) (analog system) Playback EFM asymmetry circuit constant current input terminal Playback EFM RF signal input from the CXA2523R (IC302) Ground terminal (analog system) Phase comparison output for clock playback analog PLL of the playback EFM Not used (open) Phase comparison output for master clock of the recording/playback EFM master PLL Filter input for master clock of the recording/playback master PLL Internal VCO control voltage input of the recording/playback master PLL Light amount signal (RF/ABCD) peak hold input from the CXA2523R (IC302) Light amount signal (RF/ABCD) bottom hold input from the CXA2523R (IC302) Light amount signal (ABCD) input from the CXA2523R (IC302) Focus error signal input from the CXA2523R (IC302) Auxiliary signal (I3 signal/temperature signal) input terminal Not used (fixed at H) Middle point voltage (+1.65V) input from the CXA2523R (IC302) Power supply terminal (+3.3V) (analog system) A/D converter operational range upper limit voltage input terminal (fixed at H in this set) A/D converter operational range lower limit voltage input terminal (fixed at L in this set) Ground terminal (analog system) Sled error signal input from the CXA2523R (IC302) Tracking error signal input from the CXA2523R (IC302) Auxiliary signal input terminal Light amount signal input from the CXA2523R (IC302) Connected to the +3.3V power supply Error signal input for the laser automatic power control Not used (fixed at L) ADIP duplex FM signal (22.05 kHz 1 kHz) input from the CXA2523R (IC302) Filter f0 control signal output terminal Not used (open) Serial data latch pulse signal output terminal Not used (open) Serial data transfer clock signal output terminal Not used (open) Writing serial data output terminal Not used (open) Control signal output to the reference voltage generator circuit for the laser automatic power control PWM signal output for the laser automatic power control Not used (open) Tracking servo drive PWM signal () output to the BH6511FS (IC303) Tracking servo drive PWM signal (+) output to the BH6511FS (IC303) Power supply terminal (+3.3V) (digital system) Focus servo drive PWM signal (+) output to the BH6511FS (IC303) Focus servo drive PWM signal () output to the BH6511FS (IC303) Clock signal (176.4 kHz) output terminal (Xtal system) Not used (open) Sled servo drive PWM signal () output to the BH6511FS (IC303)

L: aging NG, H: aging OK

Writing serial data signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

Pin No. to to 80

Pin Name UNIREQ UNICKIO UNISI UNISO MD-CKO MD-SI NCO SENS CC-XINT LIMIT-IN EJT-KEY ERROR-PWM MD-RST BU-IN BUS-ON SQSY C-SW MD-LAT MD-ON DEEMP A-MUTE NCO TSTCKO TSTSO TSTMOD VCC NIL

TOUT0 to TOUT3

I/O O I/O I O O I O I I I I O O I I I I O O O O O O O I I O I/O
Function Data request signal output terminal (for SONY bus) H: request on Not used (open) Serial clock signal input from the master controller (IC700) or serial clock signal output to the SONY bus interface (IC600) and master controller (IC700) (for SONY bus) Serial data input from the SONY bus interface (IC600) Serial data output to the SONY bus interface (IC600) Serial data transfer clock signal output to the CXD2652AR (IC301) and CXA2523R (IC302) Reading serial data signal input from the CXD2652AR (IC301) Not used (open) Internal status (SENSE) input from the CXD2652AR (IC301) Interrupt status input from the CXD2652AR (IC301) Detection input from the sled limit-in detect switch The optical pick-up is inner position when L Eject request signal input terminal L: eject on Not used (fixed at H) PWM error monitor output terminal (C1and ATER is output when test mode) Not used (open) Reset signal output to the PCM1718E (IC101), CXD2652AR (IC301) and BH6511FS (IC303) L: reset Battery detect signal input from the SONY bus interface (IC600) and battery check circuit H: battery on SONY bus on/off control signal input from the master controller (IC700) L: bus on Subcode Q sync (SCOR) input from the CXD2652AR (IC301) L is input every 13.3 msec Almost all, H is input Inputs the disc loading start or disc eject completion detect switch detection signal L: When start or eject completed of the disc loading operation Serial data latch pulse signal output to the CXD2652AR (IC301) and CXA2523R (IC302) Power supply on/off control signal output of the MD mechanism deck section main power supply H: power on Emphasis on/off control signal output to the PCM1718E (IC101) H: emphasis on Audio muting on/off control signal output terminal Not used (open) Output of clock signal for the test mode display Not used (open) Output of data for the test mode display Not used (open) Setting terminal for the test mode L: test mode, H: normal mode Power supply terminal (+5V) Not used (fixed at H) Output of the 48 matrix test keys Not used (open) Not used (open) Input of the 48 matrix test keys (L is always output, except in test mode)

TIN0 to TIN2

*1 Loading motor (M903) control Operation Terminal LOAD (pin 6) EJECT (pin 7) IN H L OUT L H BRAKE H H STOP L L
MAIN BOARD IC700 (MASTER CONTROLLER) MB90574PFV-G-186-BND (MDX-C7970R) MB90574PFV-G-185-BND (MDX-C7970) Pin No. 1 to 17 18, Pin Name NC VCC PLL SI PLL SO PLL CKO DOOR-SW LCD SO LCD CKO BEEP DBMOD2 NOSE-SW NC UNI SI UNI SO UNI CKIO NC SIRCS PACK-IND VOL SO VOL CKO DSTSEL0 SYSRST DSTSEL1 DBMOD1 TESTIN VSS C NS-MASK BUS- ON I/O O I O O I O O O O I O I O I/O O I O O O I O I O I O O Not used (open) Power supply terminal (+5V) PLL serial data input terminal PLL serial data output terminal Not used (open) Not used (open) Not used (open) Function
PLL serial data transfer clock signal output terminal
Front panel block remove/attach detection signal input terminal L: front panel is attached Serial data output to the liquid crystal display driver (IC501) Serial data transfer clock signal output to the liquid crystal display driver (IC501) Beep sound drive signal output terminal D-BASS mode control signal output terminal Not used (open) Front panel open/close detection switch (S901) input L is input when the front panel is closed Not used (open) Serial data input from the SONY bus interface (IC600) Serial data output to the SONY bus interface (IC600) Serial clock signal output to the MD mechanism controller (IC501) and SONY bus interface (IC600) or serial clock signal input from the MD mechanism controller (IC501) (for SONY bus) Not used (open) Sircs remote control signal input from the remote control receiver (IC502) LED drive signal output of the MD disc slot illumination and 6 indicator (LED891, LSW890) H: LED on H is output to turn on LED when front panel is opened Serial data output for the electrical volume Not used (open) Not used (open) Serial data transfer clock signal output for the electrical volume
Destination setting terminal (Except German models: fixed at H, German model: fixed at L) System reset signal output to the MD mechanism controller (IC501) and SONY bus interface (IC600) L: reset Destination setting terminal (US, Canadian models: fixed at H, E model: fixed at L) D-BASS mode control signal output terminal Setting terminal for the test mode Ground terminal Connected to coupling capacitor for the power supply Discharge control signal output for the noise detection circuit H: discharge Used for the MDX-C7970R only (MDX-C7970: Not used (open)) Bus on/off control signal output to the MD mechanism controller (IC501) and SONY bus interface (IC600) L: bus on A/D converter power control signal output terminal When the KEYACK (pin &) that controls reference voltage power for key A/D conversion input is active, L is output from this terminal to enable the input Power supply terminal (+5V) (for D/A converter) Ground terminal (for D/A converter) View field angle control signal is output when front panel is fully opened H: front panel is fully opened Chip enable signal output for the electrical volume Power supply terminal (+5V) (for A/D converter) Not used (open) Not used (open)

IF band select signal output terminal H: wide mode In receiving FM signals, interference noise from adjacent stations is removed by narrowing the IF band automatically in the tuner unit so as to raise the selectivity, but in this case, the distortion may increase and accordingly, the IF band is widened forcibly Used for the MDX-C7970R only (MDX-C7970: Not used (open)) Data transmit completed detect signal input from the RDS decoder (IC102) Used for the MDX-C7970R only (MDX-C7970: Not used (open)) Narrow select signal output terminal H active Used for the MDX-C7970R only (MDX-C7970: Not used (open)) IF counter request signal input from the FM/AM PLL (IC100) Two-way data bus with the FM/AM PLL (IC100), RDS decoder (IC102) and electrical volume (IC300) (RDS decoder is MDX-C7970R only) Bus clock signal output to the FM/AM PLL (IC100), RDS decoder (IC102) and electrical volume (IC300) (RDS decoder is MDX-C7970R only) Rotary remote commander shift key input terminal Sub system clock output terminal (32.768 kHz) L: shift H active
DAVN NARROW SSTOP SDA SCL RC-IN1 X1A

I O I I/O O I O

Pin No. 76 77, 80 81
Pin Name X0A NC BU-IN NC KEYACK TEL-ATT ST-MONO
I/O I O I O I I I/O Not used (open)
Function Sub system clock input terminal (32.768 kHz) Battery detect signal input from the SONY bus interface (IC600) and battery detect circuit L is input at low voltage Not used (open) Input of acknowledge signal for the key entry Acknowledge signal is input to accept function and eject keys in the power off status On at input of H Telephone muting signal input terminal At input of H, the signal is attenuated by 20 dB FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU1), or forced monaural control signal output to the FM/AM tuner unit (TU1) L is input in the FM stereo mode, or L is output in the forced monaural mode Seek control signal output to the FM/AM tuner unit (TU1) AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM FM mode: Used for SD speed up at SEEK, BTM, or AF L is output at tuner off Station detector detect input from the FM/AM tuner unit (TU1) Stop level for SEEK, BTM, etc. is determined SD is present at input of H Not used (open) PLL serial chip enable signal output terminal Not used (open) Hardware standby input terminal L: hardware standby mode Reset signal input in this set Setting terminal for the CPU operational mode (fixed at L in this set) Setting terminal for the CPU operational mode (fixed at H in this set) Setting terminal for the CPU operational mode (fixed at H in this set) System reset signal input from the reset signal generator (IC501) and reset switch (S900) L: reset L is input for several 100 msec after power on, then it changes to H Ground terminal Main system clock input terminal (3.68 MHz) Main system clock output terminal (3.68 MHz) Power supply terminal (+5V) Power select switch input terminal L: off (halt mode), H: on (operation mode) Not used (open) Polar monaural detection signal input terminal Not used (open) Not used (open) Frequency select switch (S701) input terminal L: MW10k step/FM 200k step, H: MW 9k step/FM 50k step Used for the E model only (Except E models: fixed at H) Not used (open) Internal RAM reset detection signal input from the RN5VD23AA (IC802) Input terminal to check that RAM data are not destroyed due to low voltage This checking is made within 100 msec after reset Not used (open) Chip enable signal output to the liquid crystal display driver (IC501) H active Internal flash memory data write mode detection signal input terminal L: data write mode Not used (fixed at H in this set) Dial pulse input of the rotary encoder (RE501) (for VOLUME/BASS/TREBLE/BALANCE/FADER control) Power on/off control signal output of the illumination LED and liquid crystal display driver (IC501) H: power on Main system power supply on/off control signal output to the BA3918 (IC800) H: power on

Les composants identifis par une marque ! sont critiques pour la scurit. Ne les remplacer que par une pice portant le numro spcifi. Remark
Description SCREW ASSY, FEED SCREW (M1.4X1.6), SPECIAL HEAD SPRING (SL FEED) SHAFT (SL) OPTICAL PICK-UP KMS-241B/J1RP SHAFT (SL 2) MOTOR ASSY, SP (SPINDLE) MOTOR ASSY, SL (SLED) MOTOR ASSY, LO (LOADING)
SECTION 6 ELECTRICAL PARTS LIST
NOTE: Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. -XX and -X mean standardized parts, so they may have some difference from the original one. RESISTORS All resistors are in ohms. METAL: Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F: nonflammable Items marked * are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. SEMICONDUCTORS In each case, u: , for example: uA. : A. uPA. : PA. uPB. : PB. uPC. : PC. uPD. : PD. CAPACITORS uF: F COILS uH: H

DISPLAY

The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Les composants identifis par une marque ! sont critiquens pour la scurit. Ne les remplacer que par une pice portant le numro spcifi. When indicating parts by reference number, please include the board.

Ref. No.

Description DISPLAY BOARD *************
Description < SWITCH >

* * * *

X-3376-697-1 3-030-932-01 3-030-933-01 3-032-271-01
HOLDER ASSY, LCD PLATE (LCD), GROUND SHEET (DIFFUSION) SHEET (S), LCD < CAPACITOR >

C501 C502 C503 C504 C505

1-163-037-11 1-110-501-11 1-164-489-11 1-163-021-11 1-163-021-11
CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP < CONNECTOR >
0.022uF 0.33uF 0.22uF 0.01uF 0.01uF

10% 10% 10% 10% 10%

25V 16V 16V 50V 50V
LSW512 1-762-620-21 SWITCH, KEY BOARD (WITH LED) (LIST) (C7970) LSW512 1-762-620-21 SWITCH, KEY BOARD (WITH LED) (LIST, PTY) (C7970R) LSW513 1-762-620-21 SWITCH, KEY BOARD (WITH LED) (DSPL) (C7970) LSW513 1-762-620-21 SWITCH, KEY BOARD (WITH LED) (AF/TA) (C7970R) LSW514 1-762-620-21 SWITCH, KEY BOARD (WITH LED) (10) LSW515 LSW516 LSW517 LSW518 LSW519 LSW520 LSW521 LSW531 LSW532 LSW533 1-762-620-21 1-762-620-21 1-762-620-21 1-762-620-21 1-762-620-21 1-762-620-21 1-762-620-21 1-762-620-21 1-762-620-21 1-762-620-21 SWITCH, KEY BOARD (WITH LED) (9) SWITCH, KEY BOARD (WITH LED) (8) SWITCH, KEY BOARD (WITH LED) (7) SWITCH, KEY BOARD (WITH LED) (6) SWITCH, KEY BOARD (WITH LED) (5) SWITCH, KEY BOARD (WITH LED) (4) SWITCH, KEY BOARD (WITH LED) (3) SWITCH, KEY BOARD (WITH LED) (OFF) SWITCH, KEY BOARD (WITH LED) (SOURCE) SWITCH, KEY BOARD (WITH LED) (DSPL) (C7970R) SWITCH, KEY BOARD (WITH LED) (SOUND) SWITCH, KEY BOARD (WITH LED) (MODE) SWITCH, KEY BOARD (WITH LED) (SFIFT) SWITCH, KEY BOARD (WITH LED) (1) SWITCH, KEY BOARD (WITH LED) (2) < TRANSISTOR >

5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5%
1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W
1-216-073-00 METAL CHIP 1-216-121-00 RES,CHIP 1-216-198-00 RES,CHIP 1-216-081-00 METAL CHIP 1-216-081-00 METAL CHIP 1-216-097-00 1-216-097-00 1-216-057-00 1-216-097-00 1-216-097-00 RES,CHIP RES,CHIP METAL CHIP RES,CHIP RES,CHIP
< CONPOSITION CIRCUIT BLOCK > RB900 RB901 RB902 RB903 1-233-412-11 1-233-412-11 1-233-576-11 1-233-576-11 RES, CHIP NETWORK 1K (3216) RES, CHIP NETWORK 1K (3216) RES, CHIP NETWORK 100 RES, CHIP NETWORK 100 < VARIABLE RESISTOR > RV1 1-223-590-21 RES, ADJ, CARBON 220K (C7970R) < SWITCH > S701 S900 S901 1-572-552-21 SWITCH, SLIDE (FREQUENCY SELECT) (C7970: E) 1-692-431-21 SWITCH, TACTILE (RESET) 1-571-754-31 SWITCH, PUSH (1 KEY) (NOSE DETECT) < THERMISTOR > TH600 1-801-792-21 THERMISTOR, POSITIVE < TUNER UNIT > TU1 TU1 A-3320-693-A TUX-011 (E) (FM/AM TUNER UNIT) (C7970) A-3282-045-A TUX-012 (E) (FM/AM TUNER UNIT) (C7970R) < VIBRATOR > X1 1-781-258-11 VIBRATOR, CRYSTAL (10.25MHz) X2 1-579-242-11 VIBRATOR, CRYSTAL (4.332MHz) (C7970R) X700 1-767-833-21 VIBRATOR, CERAMIC (3.68MHz) X701 1-579-886-21 VIBRATOR, CRYSTAL (32.768kHz) ************************************************************
2.2K 5% 1/10W 2.2K 5% 1/10W 100K 5% 1/10W 100K 5% 1/10W 100K 5% 1/10W (C7970/C7970R: AEP, UK) 100K 100K 100K 470K 100K 1K 10 10K 47K 47K 10K 10K 10K 5% 1/10W (C7970R: German) 5% 1/10W (C7970: US, Canadian) 5% 1/10W (C7970: E) 5% 1/10W 5% 1/10W 5% 5% 5% 5% 5% 0.5% 0.5% 5% 1/10W 1/10W (C7970R) 1/8W 1/10W 1/10W 1/10W 1/10W 1/10W
R781 R782 R783 R800 R801 R802 R897 R900 R901 R902 R903 R904 R905
1-216-097-00 RES,CHIP 1-216-097-00 RES,CHIP 1-216-097-00 RES,CHIP 1-216-113-00 METAL CHIP 1-216-097-00 RES,CHIP 1-216-049-11 RES,CHIP 1-216-001-00 METAL CHIP 1-216-222-00 RES,CHIP 1-216-089-00 RES,CHIP 1-216-089-00 RES,CHIP 1-216-675-11 METAL CHIP 1-216-675-11 METAL CHIP 1-216-073-00 METAL CHIP

SENSOR

Ref. No. Part No.
Description Remark Ref. No. C344 C345 C346 C347 C348 C349 C350 C351 C352 C353 C356 C357 C358 C359 C361 C362 C402 C403 C501 C503 C504 C505 C506 C510 C511 C512 C513 C514 C515 C516 Part No. Description 22uF 0.01uF 22uF 0.01uF 0.1uF 0.1uF 0.1uF 22uF 0.1uF 0.1uF 100PF 100PF 100PF 47PF 10uF 0.1uF 0.01uF 0.1uF 100PF 0.1uF 0.1uF 0.1uF 22uF 0.22uF 0.1uF 0.1uF 0.1uF 0.22uF 0.1uF 0.1uF 20% 10% 20% 10% 10% 10% 10% 20% 10% 10% 5% 5% 5% 5% 20% 10% 10% 10% 5% 10% 10% 10% 20% 10% 10% 10% 10% 10% 10% 10% Remark 6.3V 25V 6.3V 25V 16V 16V 16V 10V 16V 16V 50V 50V 50V 50V 6.3V 16V 25V 16V 50V 16V 16V 16V 10V 10V 16V 16V 16V 10V 16V 16V 1-104-852-11 TANTAL. CHIP 1-162-970-11 1-104-852-11 1-162-970-11 1-107-826-11 1-107-826-11 1-107-826-11 1-104-852-11 1-107-826-11 1-107-826-11 1-162-927-11 1-162-927-11 1-162-927-11 1-162-923-11 1-135-259-11 1-107-826-11 1-162-970-11 1-107-826-11 1-162-927-11 1-107-826-11 1-107-826-11 1-107-826-11 1-104-852-11 1-115-467-11 1-107-826-11 1-107-826-11 1-107-826-11 1-115-467-11 1-107-826-11 1-107-826-11 CERAMIC CHIP TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP < CONNECTOR > CN101 CN102 CN103 1-779-389-21 HOUSING,CONNECTOR (PC BOARD) 30P 1-573-929-11 CONNECTOR, FFC/FPC (ZIF) 20P 1-764-439-21 CONNECTOR, FPC 11P < DIODE > D401 D501 8-719-157-93 DIODE RD3.0SB2 8-719-988-61 DIODE 1SS355TE-17 < FERRITE BEAD > FB301 FB302 1-414-235-11 INDUCTOR CHIP 0uH 1-414-760-21 INDUCTOR CHIP 0uH < IC > IC101 IC301 IC302 IC303 IC304 IC305 IC306 IC307 IC401 IC501 IC502 IC503 8-759-571-84 8-752-384-47 8-752-074-77 8-759-430-25 8-759-096-87 8-759-040-83 8-759-058-62 8-759-368-16 8-759-909-71 8-752-898-83 IC IC IC IC IC IC IC IC IC IC PCM1718E/2K CXD2652AR CXA2523R BH6511FS-E2 TC7WU04FU (TE12R) BA6287F TC7S08FU (TE85R) MN41V4400TT-08S BA4558F CXP84340-201Q

A-3317-457-A SENSOR BOARD, COMPLETE *********************** For the parts on the SENSOR board, replace the entire mounted board. ************************************************************ * A-3317-459-A SERVO BOARD, COMPLETE ********************** < CAPACITOR > C101 C102 C103 C104 C105 C106 C107 C108 C109 C201 C202 C301 C302 C304 C305 C306 C307 C308 C309 C310 C311 C314 C315 C316 C317 C318 C319 C320 C321 C322 C324 C325 C326 C327 C328 C329 C330 C331 C333 C334 C335 C336 C337 C338 C339 C340 C341 C342 C343 1-104-543-11 1-135-259-11 1-162-970-11 1-107-826-11 1-107-826-11 1-135-181-21 1-162-970-11 1-162-970-11 1-135-181-21 1-104-543-11 1-135-259-11 1-107-826-11 1-107-826-11 1-162-927-11 1-162-970-11 1-107-823-11 1-107-826-11 1-162-927-11 1-162-968-11 1-107-823-11 1-164-245-11 1-107-826-11 1-109-982-11 1-107-826-11 1-107-826-11 1-104-852-11 1-104-852-11 1-164-227-11 1-162-969-11 1-162-964-11 1-107-826-11 1-110-563-11 1-162-968-11 1-109-982-11 1-162-966-11 1-164-227-11 1-162-970-11 1-107-826-11 1-107-826-11 1-164-004-11 1-164-004-11 1-162-970-11 1-164-004-11 1-164-004-11 1-162-970-11 1-162-918-11 1-162-918-11 1-162-970-11 1-162-970-11 FILM CHIP TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP CERAMIC CHIP TANTALUM CHIP FILM CHIP TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTAL. CHIP TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 0.0022uF 10uF 0.01uF 0.1uF 0.1uF 4.7uF 0.01uF 0.01uF 4.7uF 0.0022uF 10uF 0.1uF 0.1uF 100PF 0.01uF 0.47uF 0.1uF 100PF 0.0047uF 0.47uF 0.015uF 0.1uF 1uF 0.1uF 0.1uF 22uF 22uF 0.022uF 0.0068uF 0.001uF 0.1uF 0.068uF 0.0047uF 1uF 0.0022uF 0.022uF 0.01uF 0.1uF 0.1uF 0.1uF 0.1uF 0.01uF 0.1uF 0.1uF 0.01uF 18PF 18PF 0.01uF 0.01uF 5% 20% 10% 10% 10% 20% 10% 10% 20% 5% 20% 10% 10% 5% 10% 10% 10% 5% 10% 10% 10% 10% 10% 10% 10% 20% 20% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 5% 5% 10% 10% 50V 6.3V 25V 16V 16V 6.3V 25V 25V 6.3V 50V 6.3V 16V 16V 50V 25V 16V 16V 50V 50V 16V 25V 16V 10V 16V 16V 6.3V 6.3V 25V 25V 50V 16V 16V 50V 10V 50V 25V 25V 16V 16V 25V 25V 25V 25V 25V 25V 50V 50V 25V 25V

The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified.
Les composants identifis par une marque ! sont critiques pour la scurit. Ne les remplacer que par une pice portant le numro spcifi.
PARTS FOR INSTALLATION AND CONNECTION ************************************* 3-009-613-21 X-3376-976-1 3-027-138-01 X-3366-405-1 FRAME COLLAR ASSY SPRING, FITTING SCREW ASSY (EXP), FITTING (C7970: E/C7970R) 3-934-325-01 SCREW, +K (5X8) TAPPING X-3368-725-1 SCREW ASSY, FITTING (C7970: US, Canadian) 3-924-961-01 SUPPORT (ND), FITTING (C7970: US, Canadian) X-3373-432-1 BRACKET ASSY (for RM-X4S) (C7970/C7970R: AEP, German) 7-685-248-14 SCREW +KTP 3X12 TYPE4 X-3369-817-1 BRACKET ASSY (for RM-X4S) (C7970R: AEP, UK) 1-465-459-21 ADAPTER, ANTENNA (C7970R) 1-776-207-72 CORD (WITH CONNECTOR) (POWER) (C7970) 1-776-527-71 CORD (WITH CONNECTOR) (ISO) (POWER) (C7970R)

FRAME 1

COLLAR ASSY 1

FITTING SPRING 2

FITTING SCREW 1

BUSHING 1

+KCC7970R 2

+T1 +P1

FITTING SUPPORT (ND) 1

508 509

+KTP1 PLATE (BRACKET) 1 CLAMP (LOW TYPE) 1

510 509

+KTP2 PLATE (BRACKET) 1 CLAMP (LOW TYPE) 1

ANTENNA ADAPTER 1

POWER CORD 1

POWER CORD (ISO) 1

Sony Corporation

9-926-439-11

Personal & Mobile Communication Company
99B0578-1 Printed in Japan 1999. 2 Published by Quality Assurance Dept.

MDX-C7970/C7970R

SERVICE MANUAL
US Model Canadian Model E Model

MDX-C7970

AEP Model UK Model

MDX-C7970R

For RM-X4S (Remote Commander), please refer to RM-X4S Service Manual (9-925-698-) previously issued.

Photo: MDX-C7970R

Model Name Using Similar Mechanism Base Mechanism Type Optical Pick-Up Name
MDX-C7900/C7900R MG-164N-138 KMS-241B/J1NP

SPECIFICATIONS

Continued on next page
FM/AM(MW/LW) MINIDISC PLAYER

MICROFILM

4-8. SCHEMATIC DIAGRAM SERVO Board (1/3) See page 67 for Waveforms. See page 63 for IC Block Diagrams.
The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Les composants identifis par une marque ! sont critiques pour la scurit. Ne les remplacer que par une pice portant le numro spcifi. Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : MD PLAY : Impossible to measure

(Page 39)

Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : MD PLAY : Impossible to measure
SCHEMATIC DIAGRAM SERVO Board (2/3)
See page 67 for Waveforms.
See page 62 for IC Block Diagrams.

(Page 38)

(Page 41)
SCHEMATIC DIAGRAM SERVO Board (3/3)
See page 67 for Waveform.

(Page 47)

(Page 40)
4-13. SCHEMATIC DIAGRAM MAIN Board (1/4) See page 67 for Waveforms. See page 65 for IC Block Diagrams.
Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM (MW) [ ] : LW : MD PLAY

(Page 42)

(Page 49)

(Page 53)

(Page 52)
4-14. SCHEMATIC DIAGRAM MAIN Board (2/4)
Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : FM

(Page 48)

(Page 54)
Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM (MW) [ ] : LW
SCHEMATIC DIAGRAM MAIN Board (3/4)
See page 65 for IC Block Diagrams.
SCHEMATIC DIAGRAM MAIN Board (4/4)
See page 66 for IC Block Diagrams.
Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM (MW) [ ] : LW : MD PLAY

(Page 61)

Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM
SCHEMATIC DIAGRAM DISPLAY Board
See page 68 for Waveform.
SCHEMATIC DIAGRAM SUB Board

(Page 57)

IC Block Diagrams SERVO Board IC101
XTI 1 DGND 2 VDD 3 LRCIN 4 DIN 5 NOISE SHAPER BCKIN 6 ZERO 7 D/C_R 8 VOUTR 9 AGND LEVEL DAC LOWPASS FILTER CMOS AMP 5 LEVEL DAC LOWPASS FILTER CMOS AMP 15 RSTB 14 FORMAT 13 D/C_L 12 VOUTL 11 VCC

PCM1718E/2K

CLK CONTROL INPUT INTERFACE DIGITAL FILTER 20 XTO 19 CLKO MODE CONTROL 18 MUTE 17 DMDM0

CXD2652AR

APCREF F0CNT TEST3 TEST2 TEST1 DVDD DCHG SRDR SPRD EFMO TRDR LDDR DVSS FRDR SFDR ADFG CKRF SPFD DTRF TFDR XLRF FFDR FGIN APC FS4

AUTO SEQUENCER

MNTMNTMNTMNTMONITOR CONTROL EACH BLOCK

SPINDLE SERVO

PWM GENERATOR
75 AUXTE 73 SE 72 AVSS 71 ADRB
ADIP DECODER SWDT 5 SCLK 6 XLAT 7 SRDT 8 SENS 9 XRST 10 SQSY 11 DQSY 12 RECP 13

70 ADRT 69 AVDD 68 ADIO

CPU I/F

EACH BLOCK

67 VC SERVO DSP A/D CONVERTER ANALOG MUX 66 AUXFE 64 ABCD 63 BOTM 62 PEAK 61 CLTV 60 FILO 59 FILI 58 PCO 57 PDO 56 AVSS

SUBCODE PROCESSOR

XINT 14 TX 15 OSCI 16 OSCO 17 XTSL 18 NC 19 DVSS 20 DIN 21 DOUT 22 CLOCK GENERATOR EACH BLOCK
SHOCK RESISTANT MEMORY CONTROLLER
EFM/ACIRC ENCODER/ DECODER

DIGITAL AUDIO I/F

SAMPLING RATE CONVERTER
55 RFI 54 BIAS 53 AVDD 52 ASYI 51 ASYO

ADDT 23 DADT 24 LRCK 25

ATRAC ENCODER/DECODER
ADDRESS/DATA BUS A00 - A11, D0 - D3

DVDD XBCK FS256

DVSS XRAS XCAS XWE XOE D1 D0 D2 A03 A02 A01 A00 A10 A04 A05 A06 A07 A08 A11 A09 D3

CXA2523R

COMPO COMPP MORFO RF AGC MORFI ADDC PEAK
BOTM 35 ABCD 34 FE 33 AUX ABCDA BPFC 32 ADFG 31 ADAGC BB + + 30 ADIN FEA 29 ADFM TG SEA 27 CSLED TESW TEA TG 26 TE 28 SE 25 WBLADJ 24

45 + USROP

+ BPF3T

40 RF AGC

USRC DET EQ
RFA2 I J CFST GRV GRVA WBL HLPT PTGR 3T PEAK BOTTOM 3T

PEAK3T P-P WBL

GSW IV PD 10

APC 11 APCREF 14 15

+ + + +
CC BPF22 + + DD WBL WBL ATA ADIP AGC

1 PTGR 2

EE' EFB

+ FBAL

WBL 3T EQ VI CONV

AUXSW COMMAND

BGR VREF

SCRI - PARA DECODE

BH6511FS-E2
PGND2 PGND1 OUT2R OUT1R CAPA+ OUT2F OUT1F VM12 IN2R IN1R IN3R VM2 VM1 IN2F IN1F VDD 17 VDD PSB 16 PSB

INTERFACE

CHARGE PUMP. OSC

PREDRIVE

3 IN4R

4 IN4F

6 OUT4F

7 PGND4

8 OUT4R

9 VM34

10 OUT3R

11 PGND3

12 OUT3F

13 VM3

14 IN3F

OUT1 1

BA6287F

7 OUT2

DRIVER TSD

DRIVER

CONTROL LOGIC

6 VREF

POWER SAVE FIN RIN

MN41V4400TT-08S

DDXWE 3

CLOCK OSC

26 GND 25 DD3 (4) INPUT BUFFER 23 XCAS 22 XOE 21 NC 20 NC
XRAS 4 NC 5 NC 6 NC 7 AADDRESS BUFFER AAAAVDD 13 ROW DECODER A0A9 COLUMN DECODER
SENSE REFRESH AMP INPUT/OUTPUT CONTROL SWITCH (4) OUTPUT BUFFER

19 NC 18 AAAAA4

MEMORY CELL (4194204 BIT)
MAIN Board IC100 TDA7427AD
DOUT2 DOUT1/INLOCK GND-SIG

LP OUT

VDD2 GND-AM AM IN FM IN NC
11 BIT PROGRAMMABLE COUNTER
SUPPLY & POWER ON RESET SWITCH SWM/DIR 5 BIT PROGRAMMABLE COUNTER PRE COUNTER FM/AM SWITCH SWITCH SWM/DIR
CONTROL SWITCH OUT 16 BIT PROGRAMMABLE COUNTER TIMER 14 BIT PROGRAMMABLE COUNTER BIT PROGRAMMABLE COUNTER FM/AM SWITCH

INLOCK DETECTOR

CHARGE PUMP SWITCH LP1/LP2

PHASE COMPARATOR

TEST LOGIC PORT EXTENSION REFERENCE OSCILLATOR IIC BUS INTERFACE

OSCOUT

LP FM LP HC LP AM
SAA6588T-118 (MDX-C7970R)
SCOUT VSSA MPX MAD PSWN VDDA VREF CIN AFIN

DOUT3 DOUT4 DOUT5 DOUT6

NJM2360AM (TE2)

SSTOP IF FM

ADDR HFREF

MULTI PATH DETECTOR

MRO MPTH
CLOCKED COMPARATOR RDS/RDBS DEMODULATOR TEST CONTROL 3 4

13 PAUSE DETECTOR

CS 1 Q1 ES 2 CT 3 GND 4

S R Ipk CT OSC

8 CD 7 SI 6 V+ 5 INVIN COMP
POWER SUPPLY & RESET 57kHz 8th ORDER BAND-PASS FILTER SIGNAL QUALITY DECODER 4 CLOCK RDS/RDBS DECODER DATA OSCILLATOR & CLOCK INTERFACE REGISTER CLOCK DATA

VREF 1.25V

IIC BUS SLAVE TRANSCEIVER

TDA7462D013TR

SE3L SE3R MUTE SDA SCL PAUSE
PAUSE DETECT INPUT GAIN & AUTO ZERO TREBLE/ BASS CONTROL CIRCUIT FRONT FADER

SE1L SE1R MD+ MD CDL+ CDL CDR CDR+ PDR PDGND PDL SE2L SE2R

FRONT SIDE SELECTOR

LOUDNESS CONTROL CIRCUIT

VOLUME CONTROL CIRCUIT

SOFT MUTE

VOICE BANDPASS HP LP

22 OUT FL
INPUT MULTIPLEXER & MIXING STAGE
FRONT FADER COMPANDER REAR FADER LOUDNESS CONTROL CIRCUIT

21 OUT FR

REAR SIDE SELECTOR

20 OUT RL

INPUT GAIN

REAR FADER

19 OUT RR

SUBWOOFER LP

FADER 18 SUBOUT+ 17 SUBOUT SDA

SUBWOOFER OUT IIC BUS

DIGITAL CONTROL CIRCUIT

SCL 16 VDD 15 GND

CREF 14

POWER SUPPLY

BA8270F-E2
BUS ON SWITCH RESET SWITCH BATTERY SWITCH 14 VCC

BA3918-V3

BUS ON 1

REGULATOR

BATT 3

RST BUS ON CLK IN BU IN

OVER VOLTAGE PROTECT

9 DATA IN 8 DATA OUT

4 MODE2 MODE1 STB

CLK 4 VREF 5 DATA 6

Waveforms SERVO Board
1 IC302 @ (TE) (MD PLAY Mode) 6 IC501 # (EXTAL) (MD PLAY Mode)

MAIN Board

1 IC(OSC IN) (FM/AM (MW) Mode)

Approx. 0.5 Vp-p

2.7 Vp-p
2 IC302 # (FE) (MD PLAY Mode) 7 IC(IN) (MD PLAY Mode)

2 IC(OSC1) (FM Mode)

Approx. 0.3 Vp-p

3.5 Vp-p

2.8 Vp-p
3 IC302 # (RF) (MD PLAY Mode)

224 ns

3 ICSWE (MD PLAY Mode)

1.2 Vp-p

14.2 Vp-p
4 IC301 @ (LRCK) (MD PLAY Mode) 4 ICTC (MD PLAY Mode)

1.1 Vp-p

5 IC301 @ (XBCK) (MD PLAY Mode)

5 IC700 & (XOA)

4.5 Vp-p

2.1 Vp-p

KEY Board
6 IC700 ( (X1) 1 IC801 @ (OSC IN)

5.8 Vp-p

271 ns
IC PIN FUNCTION DESCRIPTION
SERVO BOARD IC301 CXD2652AR (DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER, 2M BIT D-RAM) Pin No. 29 to 34 to Pin Name MNT0 MNT1 MNT2 MNT3 SWDT SCLK XLAT SRDT SENS XRST SQSY DQSY RECP XINT TX OSCI OSCO XTSL RVDD RVSS DIN DOUT ADDT DADT LRCK XBCK FS256 DVDD A03 to A00 A10 A04 to A08 A11 DVSS XOE XCAS A09 XRAS XWE I/O O O O O I I I O (3) O (3) I O O I O I I O I I O I O O O O O O O O O O O O O Function Focus OK signal output to the MD mechanism controller (IC501) H is output when focus is on (L: NG) Track jump detection signal output to the MD mechanism controller (IC501) Busy monitor signal output to the MD mechanism controller (IC501) Spindle servo lock status monitor signal output to the MD mechanism controller (IC501) Writing serial data signal input from the MD mechanism controller (IC501) Serial data transfer clock signal input from the MD mechanism controller (IC501) Serial data latch pulse signal input from the MD mechanism controller (IC501) Reading serial data signal output to the MD mechanism controller (IC501) Internal status (SENSE) output to the MD mechanism controller (IC501) Reset signal input from the MD mechanism controller (IC501) L: reset Subcode Q sync (SCOR) output to the MD mechanism controller (IC501) L is output every 13.3 msec Almost all, H is output Digital In U-bit CD format subcode Q sync (SCOR) output terminal L is output every 13.3 msec Almost all, H is output Not used (open) Laser power selection signal input terminal L: playback mode, H: recording mode (fixed at L in this set) Interrupt status output to the MD mechanism controller (IC501) Recording data output enable signal input terminal Writing data transmission timing input (Also serves as the magnetic head on/off output) Not used (fixed at L) System clock signal (512Fs=22.5792 MHz) input from the oscillator circuit System clock signal (512Fs=22.5792 MHz) output terminal Not used (open) Input terminal for the system clock frequency setting L: 45.1584 MHz, H: 22.5792 MHz (fixed at H in this set) Power supply terminal (+3.3V) (digital system) Ground terminal (digital system) Digital audio signal input terminal when recording mode Digital audio signal output terminal when playback mode Recording data input terminal Not used (fixed at L) Playback data output to the PCM1718E (IC101) L/R sampling clock signal (44.1 kHz) output to the PCM1718E (IC101) Bit clock signal (2.8224 MHz) output to the PCM1718E (IC101) Clock signal (11.2896 MHz) output to the PCM1718E (IC101) Power supply terminal (+3.3V) (digital system) Address signal output to the D-RAM (IC307) Address signal output to the external D-RAM Address signal output to the D-RAM (IC307) Address signal output to the external D-RAM Ground terminal (digital system) Output enable signal output to the D-RAM (IC307) Address signal output to the D-RAM (IC307) Row address strobe signal output to the D-RAM (IC307) Write enable signal output to the D-RAM (IC307) L active L active L active L active Column address strobe signal output to the D-RAM (IC307) Not used (open) Not used (open) Not used (fixed at L) Not used (open)

Pin No. 90 91

Pin Name D1 D0 D2 D3 MVCI ASYO ASYI AVDD BIAS RFI AVSS PDO PCO FILI FILO CLTV PEAK BOTM ABCD FE AUX1 VC ADIO AVDD ADRT ADRB AVSS SE TE AUX2 DCHG APC ADFG F0CNT XLRF CKRF DTRF APCREF LDDR TRDR TFDR DVDD FFDR FRDR FS4 SRDR
I/O I/O I/O I/O I/O I O I (A) I (A) I (A) O (3) O (3) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) I O O O O O O O O O O O O Two-way data bus with the D-RAM (IC307)

Function

Digital in PLL oscillation input from the external VCO Not used (fixed at L) Playback EFM full-swing output terminal Playback EFM asymmetry comparator voltage input terminal Power supply terminal (+3.3V) (analog system) Playback EFM asymmetry circuit constant current input terminal Playback EFM RF signal input from the CXA2523R (IC302) Ground terminal (analog system) Phase comparison output for clock playback analog PLL of the playback EFM Not used (open) Phase comparison output for master clock of the recording/playback EFM master PLL Filter input for master clock of the recording/playback master PLL Internal VCO control voltage input of the recording/playback master PLL Light amount signal (RF/ABCD) peak hold input from the CXA2523R (IC302) Light amount signal (RF/ABCD) bottom hold input from the CXA2523R (IC302) Light amount signal (ABCD) input from the CXA2523R (IC302) Focus error signal input from the CXA2523R (IC302) Auxiliary signal (I3 signal/temperature signal) input terminal Not used (fixed at H) Middle point voltage (+1.65V) input from the CXA2523R (IC302) Power supply terminal (+3.3V) (analog system) A/D converter operational range upper limit voltage input terminal (fixed at H in this set) A/D converter operational range lower limit voltage input terminal (fixed at L in this set) Ground terminal (analog system) Sled error signal input from the CXA2523R (IC302) Tracking error signal input from the CXA2523R (IC302) Auxiliary signal input terminal Light amount signal input from the CXA2523R (IC302) Connected to the +3.3V power supply Error signal input for the laser automatic power control Not used (fixed at L) ADIP duplex FM signal (22.05 kHz 1 kHz) input from the CXA2523R (IC302) Filter f0 control signal output terminal Not used (open) Serial data latch pulse signal output terminal Not used (open) Serial data transfer clock signal output terminal Not used (open) Writing serial data output terminal Not used (open) Control signal output to the reference voltage generator circuit for the laser automatic power control PWM signal output for the laser automatic power control Not used (open) Tracking servo drive PWM signal () output to the BH6511FS (IC303) Tracking servo drive PWM signal (+) output to the BH6511FS (IC303) Power supply terminal (+3.3V) (digital system) Focus servo drive PWM signal (+) output to the BH6511FS (IC303) Focus servo drive PWM signal () output to the BH6511FS (IC303) Clock signal (176.4 kHz) output terminal (Xtal system) Not used (open) Sled servo drive PWM signal () output to the BH6511FS (IC303)

O (A) Filter output for master clock of the recording/playback master PLL
O (A) Monitor output of the A/D converter input signal Not used (open)

Pin No. 100

Pin Name SFDR SPRD SPFD FGIN TEST1 TEST2 TEST3 DVSS EFMO
I/O O O O I I I I O Ground terminal (digital system) Input terminal for the test (fixed at L)
Function Sled servo drive PWM signal (+) output to the BH6511FS (IC303) Spindle servo drive PWM signal () output to the BH6511FS (IC303) Spindle servo drive PWM signal (+) output to the BH6511FS (IC303) Not used (fixed at L)
EFM signal output terminal when recording mode

Not used (open)

* I (A) for analog input, O (3) for 3-state output, and O (A) for analog output in the column I/O.
SERVO BOARD IC302 CXA2523R (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No. to Pin Name I J VC A to F PD APC APCREF GND TEMPI TEMPR SWDT SCLK XLAT XSTBY F0CNT VREF EQADJ 3TADJ VCC WBLADJ TE CSLED SE ADFM ADIN ADAGC ADFG AUX FE ABCD BOTM PEAK RF RFAGC AGCI COMPO COMPP ADDC OPO OPN RFO MORFI MORFO I/O I I O I I O I I O I I I I I O I I I O I O O I I O O O O O O O I I O I I O I O I O Function I-V converted RF signal I input from the optical pick-up block detector I-V converted RF signal J input from the optical pick-up block detector Middle point voltage (+1.65V) generation output terminal Signal input from the optical pick-up detector Light amount monitor input from the optical pick-up block laser diode Laser amplifier output terminal to the automatic power control circuit Reference voltage input terminal for setting laser power Ground terminal Connected to the temperature sensor Not used (open) Not used (open) Output terminal for a temperature sensor reference voltage
Writing serial data input from the MD mechanism controller (IC501) Serial data transfer clock signal input from the MD mechanism controller (IC501) Serial data latch pulse signal input from the MD mechanism controller (IC501) Standby signal input terminal L: standby (fixed at H in this set) Center frequency control voltage input terminal of internal circuit (BPF22, BPF3T, EQ) input terminal Reference voltage output terminal Not used (open)

Center frequency setting terminal for the internal circuit (EQ) Center frequency setting terminal for the internal circuit (BPF3T) Power supply terminal (+3.3V) Center frequency setting terminal for the internal circuit (BPF22) Tracking error signal output to the CXD2652AR (IC301) Connected to the external capacitor for low-pass filter of the sled error signal Sled error signal output to the CXD2652AR (IC301) FM signal output of the ADIP Receives a ADIP FM signal in AC coupling Connected to the external capacitor for ADIP AGC ADIP duplex signal (22.05 kHz 1 kHz) output to the CXD2652AR (IC301) Auxiliary signal (I3 signal/temperature signal) output terminal Focus error signal output to the CXD2652AR (IC301) Light amount signal (ABCD) output to the CXD2652AR (IC301) Light amount signal (RF/ABCD) bottom hold output to the CXD2652AR (IC301) Light amount signal (RF/ABCD) peak hold output to the CXD2652AR (IC301) Playback EFM RF signal output to the CXD2652AR (IC301) Connected to the external capacitor for RF auto gain control circuit Receives a RF signal in AC coupling User comparator output terminal User comparator input terminal Not used (open) Not used (fixed at L) Not used (open) Not used (fixed at L) Not used (open)
Connected to the external capacitor for cutting the low band of the ADIP amplifier User operational amplifier output terminal RF signal output terminal Receives a MO RF signal in AC coupling MO RF signal output terminal User operational amplifier inversion input terminal
SERVO BOARD IC501 CXP84340-201Q (MD MECHANISM CONTROLLER) Pin No. 1 to 7 8, to 23 24, Pin Name TIN3 to TIN7 LOAD EJECT NCO MDMON E-SW AG-OK ADJ-OK NCO DFCTSEL DPLLSEL EMPHSEL LOCK NCO 2M/4M NCO MNT0 MNT1 MNT2 MNT3 RESET EXTAL XTAL VSS TX TEX AVSS AVREF INIT TEMP ACNT DO-SEL EE-CS EE-CKO EE-SIO MD-SO LINKOFF I/O I/O O O O O I O O O I I I O O I O I I I I I O I O I I I I I I O O I/O O O Function Input of the 48 matrix test keys (L is always output, except in test mode) Loading motor control signal output to the motor driver (IC305) Loading motor control signal output to the motor driver (IC305) Not used (open) Power supply on/off control signal output of the MD mechanism deck section main power supply and loading motor drive (IC305) power supply H: power on Inputs the disc loading completion detect switch detection signal L: When completed of the disc loading operation Output of aging status in test mode L: under aging, H: aging completed Output of status when aging completed in test mode Not used (open) Not used (open) Select whether defect function is used for the CXD2652AR (IC301) L: used this function , H: not used this function (fixed at H in this set) Select whether digital PLL function is used for the CXD2652AR (IC301) L: used this function , H: not used this function (fixed at H in this set) Select whether emphasis signal output from pin or unilink data L: outputs from both pin and unilink data, H: output from pin only (fixed at H in this set) Mini-disc lock detection signal output to the master controller (IC700) Not used (open) Select whether D-RAM capacitance 2M bit or 4M bit L: 4M bit (external D-RAM) , H: 2M bit (internal D-RAM of CXD2652AR) (fixed at L in this set) Not used (open) Focus OK signal input from the CXD2652AR (IC301) H is input when focus is on (L: NG) Track jump detection signal input from the CXD2652AR (IC301) Busy monitor signal input from the CXD2652AR (IC301) Spindle servo lock status monitor signal input from the CXD2652AR (IC301) System reset signal input from the master controller (IC700), reset signal generator (IC801) and reset switch (S900) L: reset For several hundreds msec. after the power supply rises, L is input, then it changes to H Main system clock output terminal (10 MHz) Main system clock input terminal (10 MHz) Ground terminal Sub system clock output terminal (32.768 kHz) Sub system clock input terminal (32.768 kHz) Ground terminal (for A/D converter) Reference voltage input terminal (+5V) (for A/D converter) Initial reset signal input terminal (A/D input) (fixed at H) Temperature sensor (TH501) input terminal (A/D input) Select the number of load/eject aging times (A/D input) 0H 54H (30 times), 55H OA9H (20 times), OAAH OFFH (10 times) Select the digital output bits (A/D input) Chip select signal output to the external EEPROM device Two way data bus with the external EEPROM device Unilink on/off control signal output for the SONY bus Not used (open) Not used (open) Serial data transfer clock signal output to the external EEPROM device Not used (open) L: link on, H: link off Not used (open) Not used (fixed at L) H: lock Not used (open) H active H active Not used (open) *1 *1

L: aging NG, H: aging OK

Writing serial data signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

Pin No. to to 80

Pin Name UNIREQ UNICKIO UNISI UNISO MD-CKO MD-SI NCO SENS CC-XINT LIMIT-IN EJT-KEY ERROR-PWM MD-RST BU-IN BUS-ON SQSY C-SW MD-LAT MD-ON DEEMP A-MUTE NCO TSTCKO TSTSO TSTMOD VCC NIL

TOUT0 to TOUT3

I/O O I/O I O O I O I I I I O O I I I I O O O O O O O I I O I/O
Function Data request signal output terminal (for SONY bus) H: request on Not used (open) Serial clock signal input from the master controller (IC700) or serial clock signal output to the SONY bus interface (IC600) and master controller (IC700) (for SONY bus) Serial data input from the SONY bus interface (IC600) Serial data output to the SONY bus interface (IC600) Serial data transfer clock signal output to the CXD2652AR (IC301) and CXA2523R (IC302) Reading serial data signal input from the CXD2652AR (IC301) Not used (open) Internal status (SENSE) input from the CXD2652AR (IC301) Interrupt status input from the CXD2652AR (IC301) Detection input from the sled limit-in detect switch The optical pick-up is inner position when L Eject request signal input terminal L: eject on Not used (fixed at H) PWM error monitor output terminal (C1and ATER is output when test mode) Not used (open) Reset signal output to the PCM1718E (IC101), CXD2652AR (IC301) and BH6511FS (IC303) L: reset Battery detect signal input from the SONY bus interface (IC600) and battery check circuit H: battery on SONY bus on/off control signal input from the master controller (IC700) L: bus on Subcode Q sync (SCOR) input from the CXD2652AR (IC301) L is input every 13.3 msec Almost all, H is input Inputs the disc loading start or disc eject completion detect switch detection signal L: When start or eject completed of the disc loading operation Serial data latch pulse signal output to the CXD2652AR (IC301) and CXA2523R (IC302) Power supply on/off control signal output of the MD mechanism deck section main power supply H: power on Emphasis on/off control signal output to the PCM1718E (IC101) H: emphasis on Audio muting on/off control signal output terminal Not used (open) Output of clock signal for the test mode display Not used (open) Output of data for the test mode display Not used (open) Setting terminal for the test mode L: test mode, H: normal mode Power supply terminal (+5V) Not used (fixed at H) Output of the 48 matrix test keys Not used (open) Not used (open) Input of the 48 matrix test keys (L is always output, except in test mode)

TIN0 to TIN2

*1 Loading motor (M903) control Operation Terminal LOAD (pin 6) EJECT (pin 7) IN H L OUT L H BRAKE H H STOP L L
MAIN BOARD IC700 (MASTER CONTROLLER) MB90574PFV-G-186-BND (MDX-C7970R) MB90574PFV-G-185-BND (MDX-C7970) Pin No. 1 to 17 18, Pin Name NC VCC PLL SI PLL SO PLL CKO DOOR-SW LCD SO LCD CKO BEEP DBMOD2 NOSE-SW NC UNI SI UNI SO UNI CKIO NC SIRCS PACK-IND VOL SO VOL CKO DSTSEL0 SYSRST DSTSEL1 DBMOD1 TESTIN VSS C NS-MASK BUS- ON I/O O I O O I O O O O I O I O I/O O I O O O I O I O I O O Not used (open) Power supply terminal (+5V) PLL serial data input terminal PLL serial data output terminal Not used (open) Not used (open) Not used (open) Function
PLL serial data transfer clock signal output terminal
Front panel block remove/attach detection signal input terminal L: front panel is attached Serial data output to the liquid crystal display driver (IC501) Serial data transfer clock signal output to the liquid crystal display driver (IC501) Beep sound drive signal output terminal D-BASS mode control signal output terminal Not used (open) Front panel open/close detection switch (S901) input L is input when the front panel is closed Not used (open) Serial data input from the SONY bus interface (IC600) Serial data output to the SONY bus interface (IC600) Serial clock signal output to the MD mechanism controller (IC501) and SONY bus interface (IC600) or serial clock signal input from the MD mechanism controller (IC501) (for SONY bus) Not used (open) Sircs remote control signal input from the remote control receiver (IC502) LED drive signal output of the MD disc slot illumination and 6 indicator (LED891, LSW890) H: LED on H is output to turn on LED when front panel is opened Serial data output for the electrical volume Not used (open) Not used (open) Serial data transfer clock signal output for the electrical volume
Destination setting terminal (Except German models: fixed at H, German model: fixed at L) System reset signal output to the MD mechanism controller (IC501) and SONY bus interface (IC600) L: reset Destination setting terminal (US, Canadian models: fixed at H, E model: fixed at L) D-BASS mode control signal output terminal Setting terminal for the test mode Ground terminal Connected to coupling capacitor for the power supply Discharge control signal output for the noise detection circuit H: discharge Used for the MDX-C7970R only (MDX-C7970: Not used (open)) Bus on/off control signal output to the MD mechanism controller (IC501) and SONY bus interface (IC600) L: bus on A/D converter power control signal output terminal When the KEYACK (pin &) that controls reference voltage power for key A/D conversion input is active, L is output from this terminal to enable the input Power supply terminal (+5V) (for D/A converter) Ground terminal (for D/A converter) View field angle control signal is output when front panel is fully opened H: front panel is fully opened Chip enable signal output for the electrical volume Power supply terminal (+5V) (for A/D converter) Not used (open) Not used (open)

L: test mode, Normally: fixed at H
AD-ON DVCC DVSS LCDANG VOL CE AVCC

O O O

Pin No. 45 46
Pin Name AVRH AVRL AVSS KEY-IN0

I/O I I I

Function Reference voltage (+5V) input terminal (for A/D converter) Reference voltage (0V) input terminal (for A/D converter) Ground terminal (for A/D converter) Key input terminal (A/D input) (LSW531, LSW532, S502, LSW533 to LSW538) OFF, SOURCE, SEEK/AMS + ) + = 0 , DSPL, SOUND, MODE, SHIFT, 1, 2 keys input (LSW533 DSPL: MDX-C7970R only) Key input terminal (A/D input) (LSW890, LSW512 to LSW521) 6, AF/TA (MDX-C7970R) LIST (MDX-C7970), LIST PTY (MDX-C7970R) DSPL (MDXC7970), 10 to 3 keys input Key input terminal (A/D input) Not used (fixed at L) Rotary remote commander key input terminal (A/D input) D-BASS switch (S501) input terminal (A/D input) Noise level detection signal input at SEEK mode (A/D input) Used for the MDX-C7970R only (MDX-C7970: Not used (open)) Multi-path detection signal input from the RDS decoder (IC102) (A/D input) Used for the MDX-C7970R only (MDX-C7970: Not used (open)) FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU1) (A/D input) Power supply terminal (+5V) Power amp muting on/off control signal output to the power amplifier (IC500) L: muting on Standby on/off control signal output to the power amplifier (IC500) L: standby mode, H: amp on Auto dimmer control illumination line detection signal input terminal L is input at dimmer detection Mini-disc lock detection signal input from the MD mechanism controller (IC501) Emphasis control signal output terminal Not used (open) H: muting on H: muting on Audio line muting on/off control signal output terminal H: lock
KEY-IN1 KEY-IN2 RC-IN0 D-BASS IN QUALITY MPDH (MTP) S-METER (VSM) VCC AMP ATT AMP ON ILL IN LOCK IN EMPH ON AU ATT AF ATT TU-ATT VSS ACC IN AF-SEEK
I I I I I I I O O I I O O O O I O
Preamp muting on/off control signal output to the electrical volume (IC300) Muting on/off control signal output of the FM tuner signal H: muting on Used for the MDX-C7970R only (MDX-C7970: Not used (open)) Ground terminal Accessory detect signal input terminal L: accessory on PLL low-pass filter time constant selection signal output at AF SEEK H is output when AF SEEK Not used (open)
IF band select signal output terminal H: wide mode In receiving FM signals, interference noise from adjacent stations is removed by narrowing the IF band automatically in the tuner unit so as to raise the selectivity, but in this case, the distortion may increase and accordingly, the IF band is widened forcibly Used for the MDX-C7970R only (MDX-C7970: Not used (open)) Data transmit completed detect signal input from the RDS decoder (IC102) Used for the MDX-C7970R only (MDX-C7970: Not used (open)) Narrow select signal output terminal H active Used for the MDX-C7970R only (MDX-C7970: Not used (open)) IF counter request signal input from the FM/AM PLL (IC100) Two-way data bus with the FM/AM PLL (IC100), RDS decoder (IC102) and electrical volume (IC300) (RDS decoder is MDX-C7970R only) Bus clock signal output to the FM/AM PLL (IC100), RDS decoder (IC102) and electrical volume (IC300) (RDS decoder is MDX-C7970R only) Rotary remote commander shift key input terminal Sub system clock output terminal (32.768 kHz) L: shift H active

DAVN NARROW SSTOP SDA SCL RC-IN1 X1A

I O I I/O O I O

Pin No. 76 77, 80 81
Pin Name X0A NC BU-IN NC KEYACK TEL-ATT ST-MONO
I/O I O I O I I I/O Not used (open)
Function Sub system clock input terminal (32.768 kHz) Battery detect signal input from the SONY bus interface (IC600) and battery detect circuit L is input at low voltage Not used (open) Input of acknowledge signal for the key entry Acknowledge signal is input to accept function and eject keys in the power off status On at input of H Telephone muting signal input terminal At input of H, the signal is attenuated by 20 dB FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU1), or forced monaural control signal output to the FM/AM tuner unit (TU1) L is input in the FM stereo mode, or L is output in the forced monaural mode Seek control signal output to the FM/AM tuner unit (TU1) AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM FM mode: Used for SD speed up at SEEK, BTM, or AF L is output at tuner off Station detector detect input from the FM/AM tuner unit (TU1) Stop level for SEEK, BTM, etc. is determined SD is present at input of H Not used (open) PLL serial chip enable signal output terminal Not used (open) Hardware standby input terminal L: hardware standby mode Reset signal input in this set Setting terminal for the CPU operational mode (fixed at L in this set) Setting terminal for the CPU operational mode (fixed at H in this set) Setting terminal for the CPU operational mode (fixed at H in this set) System reset signal input from the reset signal generator (IC501) and reset switch (S900) L: reset L is input for several 100 msec after power on, then it changes to H Ground terminal Main system clock input terminal (3.68 MHz) Main system clock output terminal (3.68 MHz) Power supply terminal (+5V) Power select switch input terminal L: off (halt mode), H: on (operation mode) Not used (open) Polar monaural detection signal input terminal Not used (open) Not used (open) Frequency select switch (S701) input terminal L: MW10k step/FM 200k step, H: MW 9k step/FM 50k step Used for the E model only (Except E models: fixed at H) Not used (open) Internal RAM reset detection signal input from the RN5VD23AA (IC802) Input terminal to check that RAM data are not destroyed due to low voltage This checking is made within 100 msec after reset Not used (open) Chip enable signal output to the liquid crystal display driver (IC501) H active Internal flash memory data write mode detection signal input terminal L: data write mode Not used (fixed at H in this set) Dial pulse input of the rotary encoder (RE501) (for VOLUME/BASS/TREBLE/BALANCE/FADER control) Power on/off control signal output of the illumination LED and liquid crystal display driver (IC501) H: power on Main system power supply on/off control signal output to the BA3918 (IC800) H: power on

SEEKOUT

97 to 109
SD-IN MONO PLL CE HSTX MD2 MD1 MD0 RESET VSS X0 X1 VCC POW-SEL POL MONO NC BAND (9K-10K) NC RAMBU NC LCD CE FLASH-W RE-IN0 RE-IN1 LAMP ON (ILL ON) PW-ON
I O O I I I I I I O I I O I O I O O I I I O O

Pin No. 110 111

112 to 118
Pin Name FM-ON TU-ON NC VSS NC

I/O O O O O

Function FM system power supply on/off control signal output to the BA3918 (IC800) L: AM power on, H: FM power on Tuner system power supply on/off control signal output to the BA3918 (IC800) H: tuner power on Not used (open) Ground terminal Not used (open)

119 120