XR-C7220/C7300/C7300W

SERVICE MANUAL

US Model Canadian Model

XR-C7220

E Model

XR-C7300/C7300W

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

Photo: XR-C7300

Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. DOLBY and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism Tape Transport Mechanism Type

XR-C5100 MG-25G-136

SPECIFICATIONS

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FM/AM (MW/SW) CASSETTE CAR STEREO

MICROFILM

6-2. SCHEMATIC DIAGRAM MAIN Section (1/3) See page 18 for Waveforms. See page 33 for IC Block Diagrams.

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6-3. SCHEMATIC DIAGRAM MAIN Section (2/3) See page 18 for Waveforms. See page 33 for IC Block Diagrams.

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6-4. SCHEMATIC DIAGRAM MAIN Section (3/3)

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6-8. SCHEMATIC DIAGRAM PANEL Section See page 18 for Waveform.

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IC Block Diagrams MAIN Board IC1 TB2118F (EL)
AM CP OUT FM CP OUT A-GND D-GND

TDA7462D

17 AMP
PAUSE DETECT INPUT GAIN & AUTO ZERO TREBLE/ BASS CONTROL CIRCUIT FRONT FADER
SE3L SE3R MUTE SDA SCL PAUSE
VCC + + 4BIT SWALLOW COUNTER SEEK/RECP PRESCALLER 12BIT PROGRAMMABLE COUNTER

REGULATOR SEEK/RECP

PHASE COMPARATOR
20BIT IF COUNTER 40BIT SHIFT REGISTER 18BIT 22BIT
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

OSCILLATOR

REFERENCE DIVIDER

REAR FADER

19 OUT RR

ON/OFF BUFFER

SUBWOOFER LP
FADER 18 SUBOUT+ 17 SUBOUT SDA

SERIAL INTERFACE

I/O PORT

OUTPUT PORT

SUBWOOFER OUT IIC BUS

DIGITAL CONTROL CIRCUIT

SCL 16 VDD 15 GND

CE DIN CK DOUT

OUT-1 OUT-2

VDD2 CREF 14

POWER SUPPLY

CXA2510AQ-T4

LINEOUT1 TAPEIN1 PBOUT1 AUXIN1 PBEQ1 MSSW DIREF TCH1

LB1638M

10 N.C.

BA3918-V3

BA8270F-E2

CONTROL LOGIC

BUS ON 1

REGULATOR

BUS ON SWITCH RESET SWITCH BATTERY SWITCH

14 VCC

T2 + PBFBPBRINPBREFPBFINF2 TAPE EQ FWD/RVS VCT 35 PBGND 36 VCT + PBFINPBREFPBRINPBFBT1 120/ PBEQPBOUTVCC TAPEIN2 AUXINMSLPF 7 LINEOUT2 + + F1 F3 X1 LPF VCC + NR BIAS X1 TAPE/AUX

120/ 70

9 OUTVS 7 OUT2
20 MSMODE MS MODE 19 DRSW 18 TAPESW 17 INSW NR MODE 16 NRSW

BATT 3

OVER VOLTAGE PROTECT + + + +

RST BUS ON CLK IN BU IN

VCC 3 INGND 5

6 N.C.

CLK 4 VREF 5 DATA 6 GND 7

9 DATA IN 8 DATA OUT

MS ON/ 15 NC OFF DETECT 14 MSOUT 13 DGND

4 MODE2 MODE1 STB

12 GND
12 MSTC OFF/B NR 10 TCH2 NC PLAY 11 FF
6-9. IC PIN FUNCTION DESCRIPTION
MAIN BOARD IC501 (SYSTEM CONTROLLER) MB90574PFV-G-180-BND (XR-C7220) MB90574PFV-G-181-BND (XR-C7300/C7300W) Pin No. Pin Name I/O Function 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 Not used (open) 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 Muting on/off control signal output of the FM and AM tuner signal H: muting on FM system power supply on/off control signal output to the BA3918 (IC671) L: AM power on, H: FM power on Tuner system power supply on/off control signal output to the BA3918 (IC671) H: tuner power on Power supply terminal (+5V) Not used (open) Bus on/off control signal output to the SONY bus interface (IC701) L: bus on Reset signal output to the SONY bus interface (IC701) L: reset Front panel open/close detection signal input L is input when the front panel is closed Serial data output to the liquid crystal display driver (IC901) Serial data transfer clock signal output to the liquid crystal display driver (IC901) Beep sound drive signal output terminal Chip enable signal output to the liquid crystal display driver (IC901) H active Serial data input from the SONY bus interface (IC701) Serial data output to the SONY bus interface (IC701) Serial data transfer clock signal output to the SONY bus interface (IC701) 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) Sircs remote control signal input from the remote control receiver (IC951) PLL serial data input from the FM/AM PLL (IC1) PLL serial data output to the FM/AM PLL (IC1) PLL serial data transfer clock signal output to the FM/AM PLL (IC1) PLL chip enable signal output to the FM/AM PLL (IC1) H active Power on/off control signal output of the illumination LED and liquid crystal display driver (IC901) H: power on Depends on initial setting of power select switch (S501) Power select switch (S501) on: H output at the accessory on Power select switch (S501) off: H output at the power on Not used (open) Ground terminal Connected to coupling capacitor for the power supply 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 Dial pulse input of the rotary encoder (RE900) (for VOLUME/BASS/TREBLE/BALANCE/FADER control) Power supply terminal (+5V) (for D/A converter) Ground terminal (for D/A converter)

SEEKOUT

2, 21 to 27 28
NCO ST-MONO TUNMUTE FM-ON TU-ON VCC NCO BUS-ON SYSRST DOORSW LCD SO LCD CKO BEEP LCD CE UNISI UNISO UNICKO SD-IN NCO SIRCS PLLSI PLLSO PLLCKO PLLCE
O I/O O O O O O O I O O O O I O O I O I I O O O

ILL-ON

30 to 38 39
NCO VSS C AD-ON RE-IN0 RE-IN1 DVCC DVSS

O O I I

Pin No. 40, 45 46
Pin Name NCO AVCC AVRH AVRL AVSS KEYIN0
I/O O I I I Not used (open)
Function Power supply terminal (+5V) (for A/D converter) 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) (LSW901 to LSW904, S901, LSW906) OFF, SOURCE, MODE *, SOUND, SEEK/AMS = 0 + ) +, SHIFT keys input Key input terminal (A/D input) (LSW801, LSW922, LSW923, LSW925, LSW926, LSW928 to LSW933) 6, PRESET DISC /+, DSPL, 6, 5 ENTER, 4 n, 3 PLAY MODE, 2 SET UP, 1 N keys input Rotary remote commander key input terminal (A/D input) Destination setting terminal (fixed at L) Noise level detection signal input at SEEK mode (A/D input) Not used (open) D-BASS switch (S981) input terminal (A/D input) Multi-path detection signal input from the RDS decoder Not used (fixed at L) FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU1) (A/D input) Power supply terminal (+5V) Internal RAM reset detection signal input from the XC61BN3312MR (IC651) Input terminal to check that RAM data are not destroyed due to low voltage This checking is made within 100 msec after reset Power select switch (S501) input terminal L: off (halt mode), H: on (operation mode) Not used (open) Setting terminal for the test mode L: test mode, Normally: fixed at H LED drive signal output of the tape window illumination and 6 indicators (LED801, LSW801) H: LED on H is output to turn on LED when front panel is opened Muting control signal output to the electrical volume (IC401) Volume minimum: output (H active) Setting terminal for the illumination color L: 2 colors, H: 1 color (fixed at L in this set) Setting terminal for the illumination color L: amber, H: green (fixed at H in this set) Ground terminal Not used (open) Audio line muting on/off control signal output terminal H: muting on Input terminal to set whether custom file function is provided or not L: none, H: provided (Fixed at H in this set) Input terminal to set whether CD text function is provided or not L: none, H: provided (Fixed at H in this set) Muting on/off control signal output to the power amplifier (IC611) L: muting on Internal flash memory data write mode detection signal input terminal L: data write mode Not used (fixed at H in this set) Two-way data bus with the electrical volume (IC401) Bus clock signal output to the electrical volume (IC401) Rotary remote commander shift key input terminal L: shift Sub system clock output terminal (32.768 kHz) Sub system clock input terminal (32.768 kHz) Data transmit completed detect signal input from the RDS decoder H active Not used (fixed at L)

KEYIN1 RC-IN0 DSTSEL NOISE DET D-BASS MTP VSM VCC RAMBU POWSEL NCO TESTIN DOOR-IND EVOL MUTE COLR SW COLR SEL VSS NCO MUTE FILE TEXT AMP MUTE FLASH-W I2C SIO I2C CKO RC-IN1 X1A X0A DAVN
I I I I I I I I I O I O O I I O O I I O I I/O O I O I I
Pin No. 82 to 95 to 113 114
Pin Name KEYACK BU-IN ILL IN TEL-ATT NOSESW ACC IN NCO HSTX MD2 MD1 MD0 RESET VSS X0 X1 VCC NCO 9K/10K NCO NCO AMSIN REEL POS0 POS1 POS2 POS3 LM-EJ LM-LOD CM-ON TAPEON N-ROUT AMSON
I/O I I I I I I O I I I I I I O O I O I I I I I I I O O O O O O
Function 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 Battery detect signal input from the SONY bus interface (IC701) and battery detect circuit L is input at low voltage Auto dimmer control illumination line detection signal input terminal L is input at dimmer detection Fixed at L in this set Telephone muting signal input terminal At input of H, the signal is attenuated by 20 dB Front panel block remove/attach detection switch (S504) input terminal L: front panel is attached Accessory detect signal input 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 (IC652) and reset switch (S503) 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) Not used (open) Frequency select switch (S502) input terminal L: AM 9 kHz/FM 50 kHz step, H: AM 10 kHz/FM 200 kHz step Used for the XR-C7300/C7300W only Not used (open) Not used (open) Whether a music is present or not from CXA2510AQ (IC301) is detected at auto music sensor L: music is present, H: music is not present Rotation detect signal input from supply reel sensor and take-up reel sensor on the deck mechanism Tape position (EJECT/FF/REW/ REV/FWD mode) detect input from the tape operation switch on the deck mechanism POS0: L: EJECT mode, H: others mode POS1: L: FF and FWD mode, H: others mode POS2: L: REW mode, H: others mode POS3: L: REV and EJECT mode, H: others mode H active H active L: accessory on
Motor drive signal output to the loading/tape operation motor drive (IC361) (For the eject direction and reverse side operation) *1 Motor drive signal output to the loading/tape operation motor drive (IC361) (For the loading direction and forward side operation) *1 Capstan/reel motor (M901) drive signal output terminal H: motor on Tape system power supply on/off control signal output terminal

H: tape on

Forward/reverse direction control signal output to the CXA2510AQ (IC301) L: forward direction, H: reverse direction Tape auto music sensor control signal output to the CXA2510AQ (IC301) L is output to lower the gain for audio level at FF/REW mode METAL control in/out terminal At initial mode: auto/manual mode selection input of METAL function (manual at L input) At manual mode: METAL on/off control signal output to the CXA2510AQ (IC301) (METAL on at H output) At auto mode: input at MTLIN (pin `)

Pin No.

Pin Name
Function Dolby control in/out terminal At initial mode: valid/invalid selection input of dolby function (valid at L input) At normal mode: dolby on/off control signal output to the CXA2510AQ (IC301) (dolby on at H output) Tape muting on/off control signal output to the CXA2510AQ (IC301) H: muting on Active at ATA, FF/REW mode Standby on/off control signal output to the power amplifier (IC611) L: standby mode, H: amp on Ground terminal Main system power supply on/off control signal output to the BA3918 (IC671) H: power on

119 120

TAPE MUTE AMP ON VSS POWON
*1 Loading/tape operation motor control Mode Terminal LM-LOD (pin `) LM-EJ (pin `) STOP L L LOADING/ FORWARD H L EJECT/ REVERSE L H BRAKE H H