3-865-649-11 (1)

FM/AM Compact Disc Player

Operating Instructions

Owners Record
The model and serial numbers are located on the bottom of the unit. Record the serial number in the space provided below. Refer to these numbers whenever you call upon your Sony dealer regarding this product. Model No. CDX-4250 Serial No.
For installation and connections, see the supplied installation/connections manual.

CDX-4250

1999 by Sony Corporation

Warning

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/ TV technician for help. You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment.

Welcome !

Thank you for purchasing the Sony Compact Disc Player. This unit lets you enjoy a variety of features.

CAUTION

The use of optical instruments with this product will increase eye hazard.

Table of Contents

Location of controls.. 4

Additional Information

Precautions.. Maintenance.. Dismounting the unit.. Specifications... Troubleshooting guide.. 13

Getting Started

Resetting the unit.. 5 Detaching the front panel.. 5 Setting the clock.. 6

CD Player

Listening to a CD.. 6 Playing a CD in various modes. 7
Memorizing stations automatically Best Tuning Memory (BTM). 7 Memorizing only the desired stations. 8 Receiving the memorized stations.. 8

Other Functions

Adjusting the sound characteristics.. 9 Turning on the clock display Power Select Function.. 9 Changing the sound and beep sound. 9

Location of controls

SEEK/AMS

SOURCE

D - BASS

REPEAT SHUF

RELEASE
Refer to the pages for details. 1 SEEK/AMS (seek/Automatic Music Sensor/manual search) control 7, MODE (band select) button 7, SOURCE (source select) button 6, 7, Dial (volume/bass/treble/left-right/ front-rear control) 6, SOUND button 6, Display window 7 SENS/BTM (sensitivity adjust/Best Tuning Memory) button 7, 6 (eject) button DSPL (display mode change/time set) button 6, RELEASE (front panel release) button 5, 11 ! Reset button (located on the front side of the unit behind the front panel) 5 ! OFF button 5, 6, 9 ! During radio reception: Number buttons 8 During CD playback: (1) REPEAT button 7 (2) SHUF button 7 ! D-BASS control 9

Resetting the unit

Before operating the unit for the first time or after replacing the car battery, you must reset the unit. Remove the front panel and press the reset button with a pointed object, such as a ballpoint pen.
Notes Be sure not to drop the panel when detaching it from the unit. If you detach the panel while the unit is still turned on, the power will turn off automatically to prevent the speakers from being damaged. When carrying the front panel with you, use the supplied front panel case.

Attaching the front panel
Attach part a of the front panel to part b of the unit as illustrated, and push the left side into position until it clicks into position.
Reset button Notes Pressing the reset button will erase the clock setting and some memorized program and memory functions. When you connect the power supply cord to the unit or reset the unit, wait for about 10 seconds before you insert a disc. If you insert a disc within these 10 seconds, the unit will not be reset, and you will have to press the reset button again.
Detaching the front panel
You can detach the front panel of this unit to protect the unit from being stolen.
Notes Be sure not to attach the front panel upside down. Do not press the front panel too hard against the unit when attaching it. Do not press too hard or put excessive pressure on the display window of the front panel. Do not expose the front panel to direct sunlight or heat sources such as hot air ducts, and do not leave it in a humid place. Never leave it on the dashboard of a car parked in direct sunlight or where there may be a considerable rise in temperature.

Caution alarm

Press (OFF). Press (RELEASE), then slide the front panel a little to the left, and pull it off towards you.
If you turn the ignition key switch to the OFF position without removing the front panel, the caution alarm will beep for a few seconds. If you connect an optional power amplifier and do not use the built-in amplifier, the beep sound will be deactivated.

(RELEASE)

Setting the clock
The clock has a 12-hour digital indication. Example: To set the clock to 10:08

Listening to a CD

Insert a CD. Playback starts automatically.

Label side up

Press (DSPL) during operation. If the POWER SELECT function is set to ON, go to step 2. If it is set to OFF, set to ON (page 9). Press (DSPL) for two seconds.
The hour indication flashes.

1 Set the hour.

To go backward

To go forward

If a CD is already inserted, press (SOURCE) repeatedly until CD appears to start playback.

Elapsed playing time

2 Press (SOUND).
Note To play back an 8 cm (3 in.) CD, use the optional Sony compact disc single adapter (CSA-8).
The minute indication flashes.
To Stop playback Eject the CD

Press 6 or (OFF) 6

3 Set the minute.
Changing the display item

Each time you press (DSPL) during CD playback, the item changes as follows:
z Elapsed playing time z Track number Clock Z

Press (DSPL).

MOTION DISPLAY* Z
* All the above items are scrolled in the display one by one in order.
The clock starts. Note If the car has no accessory position on the ignition key switch, the clock cannot be set unless the power is turned on. Set the clock after you have turned on the radio, or started CD playback.
Locating a specific track Automatic Music Sensor (AMS)
During playback, push the SEEK/AMS control up or down and release for each track you want to skip.
To locate succeeding tracks To locate preceding tracks
Memorizing stations automatically

Best Tuning Memory (BTM)

This unit selects the stations with the strongest signals and memorizes them in the order of their frequencies. You can store up to 6 stations on each band (FM I, FM II, FM III, and AM).
Locating a specific point in a track Manual Search
During playback, push the SEEK/AMS control up or down and hold for about two seconds. Release when you have found the desired point.

Caution

When tuning in stations while driving, use Best Tuning Memory to prevent accidents.
To search forward To search backward Note or appears in the If display, you have reached the beginning or the end of the disc and you cannot go any further.
Press (SOURCE) repeatedly to select the tuner. Each time you press (SOURCE), the mode changes as follows:

CD TUNER

Playing a CD in various modes
Playing tracks repeatedly Repeat Play
Press (1) during playback. REP appears in the display. When the current track is over, it will play again from the beginning. To return to normal playback mode, press again.
Press (MODE) repeatedly to select the band. Each time you press (MODE), the band changes as follows:

FM I FM II FM III AM

Press (SENS/BTM) for two seconds. The unit stores stations in the order of their frequencies on the number buttons. A beep sounds when the setting is stoned.
Playing tracks in random order Shuffle Play
Press (2) during playback. SHUF appears in the display. To return to normal playback mode, press again.
Notes The unit does not store stations with weak signals. If only a few stations can be received, some number buttons will retain their former setting. When a number is indicated in the display, the unit starts storing stations from the one currently displayed. If a CD is not in the unit, only the tuner band appears even if you press (SOURCE).
Memorizing only the desired stations
You can store up to 6 stations on each band (a total of 18 for FM I, FM II, and FM III, and 6 for AM) in the order of your choice.
If you cannot tune in a preset station

Push and release the SEEK/AMS control up or down to search for the station (automatic tuning). Scanning stops when the unit receives a station. Push the SEEK/AMS control up or down repeatedly until the desired station is received.
Note If the automatic tuning stops too frequently, press (SENS/BTM) repeatedly until LCL (local seek mode) is displayed. Only the stations with relatively strong signals will be tuned in. Tip If you know the frequency of the station you want to listen to push the SEEK/AMS control up or down and hold until the desired frequency appears (manual tuning).
Press (SOURCE) repeatedly to select the tuner. Press (MODE) repeatedly to select the band. Push the SEEK/AMS control up or down to tune in the station that you want to store on the number button. Press and hold the desired number button ((1) to (6)) until MEM appears. The number button indication appears in the display.
If FM stereo reception is poor Monaural Mode
Press (SENS/BTM) repeatedly until MONO appears. The sound improves, but becomes monaural (ST disappears). To return to normal mode, press again until MONO disappears.
Note If you try to store another station on the same number button, the previously stored station will be erased.
Receiving the memorized stations
Press (SOURCE) repeatedly to select the tuner. Press (MODE) repeatedly to select the band. Press the number button ((1) to (6)) on which the desired station is stored.
Each time you press (DSPL), the item changes as follows:

z Frequency z Clock

MOTION DISPLAY* Z * All the above items are scrolled in the display one by one in order.
Adjusting the sound characteristics
You can adjust the bass, treble, balance, and fader. You can store the bass and treble levels.
Changing the sound and beep sound
Boosting the bass sound D-bass
You can enjoy a clear and powerful bass sound. The D-bass function boosts the low frequency signal with a sharper curve than conventional bass boost. You can hear the bass line more clearly even while the vocal remains at the same volume. You can emphasize and adjust the bass sound easily with the D-BASS control. This is similar in effect to an optional subwoofer system.
D-BASS 3 D-BASS 2 D-BASS 1
Select the item you want to adjust by pressing (SOUND) repeatedly. BAS (bass) n TRE (treble) n BAL (left-right) n FAD (front-rear) n VOL (volume)

Adjust the selected item by rotating the dial. Adjust within three seconds after selecting the item. (After three seconds, the dial function reverts to volume control.)

Frequency (Hz)

Adjusting the bass curve
Turn the D-BASS control to adjust the bass level (1, 2, or 3). D-BASS appears in the display. To cancel, turn the control to OFF.
Note If the bass sound becomes distorted, adjust the D-BASS control or volume.
Turning on the clock display Power Select Function
Only for cars with an accessory position on the ignition key switch To turn the Power Select Function ON Press (OFF) while pressing (SOUND). The Power Select Function ties the clock display power to the accessory position on the ignition key switch. To avoid battery wear, the clock is not displayed while the unit is initializing.

Cancel the beep sound

Press (6) while pressing (SOUND). To obtain the beep sound again, press these buttons again.
Note If you connect an optional power amplifier and do not use the built-in amplifier, the beep sound will be deactivated.

Precautions

If your car was parked in direct sunlight resulting in a considerable rise in temperature inside the car, allow the unit to cool off before operating it. If no power is being supplied to the unit, check the connections first. If everything is in order, check the fuse. If no sound comes from the speakers of a two-speaker system, set the fader control to the center position. If your car is equipped with a power antenna, it will extend automatically while the unit is operating. If you have any questions or problems concerning your unit that are not covered in this manual, please consult your nearest Sony dealer.
Before playing, clean the discs with an optional cleaning cloth. Wipe each disc from the center out. Do not use solvents such as benzine, thinner, commercially available cleaners, or antistatic spray intended for analog discs.
Notes on moisture condensation
On a rainy day or in a very damp area, moisture may condense on the lenses inside the CD player. Should this occur, the unit will not operate properly. In this case, remove the disc and wait for about an hour until the moisture evaporates.
When you play 8 cm (3 in.) CDs
Use the optional Sony compact disc single adapter (CSA-8) to protect the CD player from damage.

Notes on handling CDs

A dirty or defective disc may cause sound dropouts while playing. To enjoy optimum sound, handle the disc by its edge. To keep the disc clean, do not touch the surface.

Do not stick paper or tape on the labeled surface.
Do not expose the discs to direct sunlight or heat sources such as hot air-ducts, or leave them in a car parked in direct sunlight where there can be a considerable rise in temperature inside the car.

Maintenance

Fuse replacement
When replacing the fuse, be sure to use one matching the amperage rating stated on the original fuse. If the fuse blows, check the power connection and replace the fuse. If the fuse blows again after replacement, there may be an internal malfunction. In such a case, consult your nearest Sony dealer.

Dismounting the unit

Release key (supplied)

Fuse (10 A)

Warning Never use a fuse with an amperage rating exceeding the one supplied with the unit as this could damage the unit.

Cleaning the connectors

The unit may not function properly if the connectors between the unit and the front panel are not clean. In order to prevent this, open the front panel by pressing (RELEASE), then detach it and clean the connectors with a cotton swab dipped in alcohol. Do not apply too much force. Otherwise, the connectors may be damaged.
Pull the unit out while the release key is inserted.
Press the clip inside the front cover with a thin screwdriver, and gently pry the front cover free.

Main unit

Back of the front panel Notes For safety, turn off the engine before cleaning the connectors and remove the key from the ignition key switch. Never touch the connectors directly with your fingers or any metal device.

Specifications

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION 17 watts per channel minimum continuous average power into 4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more than 1 % total harmonic distortion.
Other specifications CD player section
System Signal-to-noise ratio Frequency response Wow and flutter Laser Diode Properties Material Wavelength Emission Duration Laser output power Compact disc digital audio system 90 dB 10 20,000 Hz Below measurable limit GaAlAs 780 nm Continuous Less than 44.6 W*

General

Outputs Power antenna relay control Telephone ATT control lead Bass 8 dB at 100 Hz Treble 8 dB at 10 kHz 12 V DC car battery (negative ground) Approx. 185 mm (7 1/7 3/8 in.) (w/h/d) Approx. 162 mm (7 1/1/1/2 in.) (w/h/d) Approx. 1.2 kg (2 lb. 10 oz.) Parts for installation and connections (1 set) Front panel case (1) Cleaning cloth XP-CD1 Compact disc single adapter CSA-8

Tone controls Power requirements Dimensions Mounting dimensions Mass Supplied accessories Optional accessories
* This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block.

Tuner section

Tuning range Antenna terminal Intermediate frequency Usable sensitivity Selectivity Signal-to-noise ratio 87.5 107.9 MHz External antenna connector 10.7 MHz 9 dBf 75 dB at 400 kHz 65 dB (stereo), 68 dB (mono) Harmonic distortion at 1 kHz 1.0 % (stereo), 0.7 % (mono) Separation 35 dB at 1 kHz Frequency response 30 15,000 Hz
Design and specifications are subject to change without notice.
Tuning range Antenna terminal Intermediate frequency Sensitivity 530 1,710 kHz External antenna connector 10.71 MHz/450 kHz 30 V

Power amplifier section

Outputs Speaker outputs (sure seal connectors) Speaker impedance ohms Maximum power output 40 W 4 (at 4 ohms)

Troubleshooting guide

The following checklist will help you remedy the problems you may encounter with your unit. Before going through the checklist below, check the connection and operating procedures.
Problem No sound. Cause/Solution Rotate the dial in a clockwise direction to adjust the volume. Set the fader control to the center position for two-speaker systems. The power cord or battery has been disconnected. The reset button has been pressed. n Store the settings again into the memory. Remove the front panel and clean the connectors. See Cleaning the connectors (page 11) for details. An optional power amplifier is connected and you are not using the built-in amplifier. The beep sound is cancelled (page 9).
The contents of the memory have been erased. Indications do not appear in the display. No beep sound.

CD playback

Problem CD cannot be loaded. Play does not begin. CD is automatically ejected. CD will not eject. The operation buttons do not function. The sound skips due to vibration. Cause/Solution Another CD is already loaded. The CD was forcibly inserted upside down. Dirty disc. The ambient temperature exceeds 50C (122F). Press the 6 button for two seconds. Press the reset button. The unit is installed at an angle of more than 60. The unit is not installed in a sturdy part of the car.

Radio reception

Problem Preset tuning is not possible. Automatic tuning is not possible. The ST indication flashes. Cause/Solution Memorise the correct frequency. The broadcast signal is too weak. The broadcast signal is too weak. n Use manual tuning. Tune in the frequency accurately. The broadcast signal is too weak. n Set to the MONO mode (page 8).

Error displays

The following indications will flash for about five seconds. Display Cause A CD is dirty or inserted upside down. The CD player cannot be operated because of some problem. Solution Clean or insert the CD correctly. Press the reset button or 6.
If the above-mentioned solutions do not help improve the situation, consult your nearest Sony dealer.
Sony Corporation Printed in Korea

CDX-4250/4500

SERVICE MANUAL

US Model Canadian Model

CDX-4250

E Model

CDX-4500

Photo: CDX-4250

SPECIFICATIONS
Model Name Using Similar Mechanism CD Drive Mechanism Type Optical Pick-up Name
CDX-4180 MG-363X-121 KSS-521A
FM/AM COMPACT DISC PLAYER

MICROFILM

SECTION 4 DIAGRAMS

4-1. IC PIN DESCRIPTION

IC801 PD17705GC-534-3B9 (SYSTEM CONTROL) Pin No. Pin Name I/O 1 SIRCS I SIRCS input (A/D) 14, 23, IN-SW D-SW SELF-SW L-SW LM-EJ LM-LOD AMP/ANT-ON MONO SD BAND-SW AREA1-SW AREA2-SW RE1, 2 SEEK CD-ON FM-ON TU-ON NC GND3 KEYIN3 KEYIN2, 1 ROT-IN S-METER TEST-SW AM-IFC FM-IFC VDD2 VCOH-FM VCOL-AM GND2 NC EO1-PDOUT TESTO AM-ON(TU-ON) FM-ON(FM/AM) LCL/DX BEEP ACC-IN SCOR MUTE AMP-MUTE TEL-MUTE NC VOL-CE VOL-CLK VOL-DATA EMPHO PW-ON MD-ON CD-ON I I I I O O O O I I I I I O I/O I/O I/O I I I I I I I I I O O O O O I I O O O O O O O O O O CD mechanism position detection CD mechanism position detection CD mechanism position detection LIMIT switch Loading motor control (Eject direction) Loading motor control (Loading direction) Power control for amplifier. Force MONO output SD signal input Initialize switch input terminal Initialize switch input terminal Initialize switch input terminal Rotary encoder input 1, 2 SEEK output Servo drive power FM select output AM select output Not used. Ground Not used (Connect to ground) A/D key input 2, 1 Rotary commander input FM and AM common signal meter A/D conversion input TEST mode select input AM center frequency input FM center frequency input Power supply (+5 V) Local oscillation frequency input (FM) Local oscillation frequency input (AM) Ground Not used. Error out output Connect to ground AM power output (AM select) FM power output (FM select) LOCAL/DX select (H : LOCAL, L : DX) BEEP output Accessory input SUBQ data read request System mute output Power amplifier mute output Telephone mute output Fixed at H in this set. Electric volume chip select Electric volume serial clock Electric volume serial data De-emphasis control output System power control Loading motor power Servo drive power Pin Description

Pin No. 80

Pin Name ILL-ON C.ALARM NC NC LCD-CE EZ-SEL SENS FOK LD-ON NC [IN] ST/MONO [OUT] MONO LCD-CKO LCD-So INH SQ-CKo CD-RST SQ-SI CD-SO CD-LAT CD-CKO VREF GND1 X-OUT X-IN BU-IN VDD1 RESET
I/O O I I O I I I O I/O O O O O O I O O O I I I
Pin Description Illumination output Caution alarm select input (Used/Not used) Not used (Connect to ground) Fixed at H in this set. LCD drive chip select output SHIFT + input Information input from servo IC. Focus OK input Laser diode control Not used. (Connect to ground) Used for both STEREO indicator display input and force MONO output. (FM) LCD driver serial clock output LCD driver serial data output INHbit output Q data read serial clock output Servo IC/DAC reset output Q data input Serial data output to servo IC. Data latch output to servo IC. Serial clock output to servo IC. Not used. Ground Crystal oscillator connection (4.5 MHz) Crystal oscillator connection (4.5 MHz) Back-up detection Power supply (+5 V) RESET input
4-4. SCHEMATIC DIAGRAM CD MECHANISM SECTION Refer to page 22 for Waveforms and Note and page 37 for IC Block Diagrams.

(Page 33)

4-5. PRINTED WIRING BOARD DISPLAY SECTION
Semiconductor Location Ref. No. Location Ref. No. (D551) B-10 D566 (D552) B-10 D567 (D554) B-11 D568 D561 B-11 D569 D562 A-13 D570 D563 B-13 D571 D564 C-5 D572 D565 C-4 D573 ( ) : SIDE B
Location A-4 C-2 C-9 C-8 C-7 C-12 C-11 C-3
Ref. No. D574 D575 D576 D577 D578 (IC551)
Location C-2 B-3 A-2 B-1 A-1 B-7
Note: : Through hole. b : Pattern from the side which enables seeing. (The other layers patterns are not indicated.) Caution: Pattern face side: (Side B) Parts face side: (Side A)
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.
4-6. SCHEMATIC DIAGRAM DISPLAY SECTION

(Page 36)

Note: 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. U : B+ Line. Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords.

C : panel designation. Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances.
4-8. SCHEMATIC DIAGRAM MAIN SECTION (1/2)

(Page 26)

Note: 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. Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords. Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : AM < > : CD PLAY : Impossible to measure Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. Signal path. F : FM f : AM J : CD Abbreviation CND : Canadian model.
4-8. SCHEMATIC DIAGRAM MAIN SECTION (2/2) Refer to page 39 for IC Block Diagrams.

(Page 29)

IC Block Diagrams IC1 CXD2507AQ
XLON SPOD SPOC SPOB SPOA CLKO VDD XLTO DATO CNIN SEIN CLOK XLAT
FOK MON MDP MDS LOCK TEST FILO FILI PCO VSS AVSS CLTV AVDD

SERVO AUTO SEQUENCER

CPU INTERFACE
SUB CODE PROCESSOR 4 DIGITAL CLV

DIGITAL PLL

EFM DEMODULATOR
DATA XRST SENS MUTE SQCK SQSO EXCK SBSO SCOR VSS WFCK EMPH
3 ASYMMETRY CORRECTOR 5 D/A INTERFACE DIGITAL OUT

CLOCK GENERATOR

39 DOUT 34 C4M FSTT XTSL XTAO XTAI

RF BIAS ASYI ASYO ASYE

16K RAM

ERROR CORRECTOR 3

WDCK 19

33 MNTO

LRCK PCMD BCLK GTOP XUGF XPCK VDD GFS RFCK C2PO XROF MNT3 MNT1

CH3-IN CH2-IN

IC3 BA6796FP-T1
OP IN OP IN + CH1-IN CH1 + CH1 VREF CH3 CH2 CH2 + CH2 VCC CH1

LEVEL SHIFT

VCC LEVEL SHIFT

DRIVE BUFFER

THERMAL SHUT DOWN

LOGIC CTL1 CTL2 FWD REV

CH4-IN

IC2 CXA1782BQ

PHD 2 PHD 1 RF M RF O PHD RF I CC1 CC2 CP CB FOK LD

LEVEL S

MIRR RF IV AMP1 DFCT

IIL TTL

SENS C.OUT
TTL RF IV AMP2 FE BIAS 37 TTL IIL DATA REGISTER INPUT SHIFT REGISTER ADDRESS DECODER

FE AMP

XRST DATA XLT CLK
IIL IIL OUTPUT DECODER 19
38 F IV AMP TOG1-3 BAL1-3 FZC COMP FS1-4 TG1-2 TM1-7 PS1-4

E IV AMP EI 40 TE AMP

BAL1 BAL 3 BAL2

HPF COMP VEE

LPF COMP
TRACKING PHASE COMPENSATION TM6

41 TG1 16

TOG1 TOG2 TOG3

TED 42

SL O SL M
TM5 TM4 TZC COMP FCS PHASE COMPENSATION TM3 TM2
LPFI 43 TEI 44 WINDOW COMP ATSC DFCT

DFCT TM1 FS1 TM7 FSTA O

ATSC 45 TZC 46

TDFCT 47

SRCH TGU

IC401 LC75374E

LTOUT LSIN NC LVRIN LCOM NC LSB1 LT1 LT2 LT3 LSB22 LFIN + + + + + 21 LFOUT

DECODER

1 RVRIN

2 RCOM

RT1 RT2

10 RTOUT RSIN NC NC RSB1

11 RSB2

IC402 TDA7384

DRIVER
5 TAB GND OUT2 STNBY OUT2+
19 OUT1 GND OUT1+ SVR IN1 IN2 S-GND IN4 IN3 AC-GND OUT3+ GND OUT3

20 VCC

25 OUT4+ MUTE OUT4 GND N.C.

R1 R2 R3 R4 RSELO

VDD 39

LSELO L4 L3 L2 L1

20 LROUT
19 VREF CONTROL 18 CE 17 DI 16 CL 15 VSS 14 RROUT

+ SHIFT REGISTER +

13 RFOUT 12 RFIN