Sharp CD-C612 User manual

– 1 –
CD-C612
No. S3910CDC612//
CONTENTS Page
IMPORTANT SERVICE NOTES (For U.S.A. Only) ........................................................................................................... 2
SPECIFICATIONS ..............................................................................................................................................................2
NAMES OF PARTS ........................................................................................................................................................... 3
OPERATION MANUAL ...................................................................................................................................................... 5
QUICK GUIDE ................................................................................................................................................................... 6
DISASSEMBLY.................................................................................................................................................................. 7
REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 10
ADJUSTMENT ................................................................................................................................................................. 10
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 13
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 14
BLOCK DIAGRAM ........................................................................................................................................................... 15
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................18
VOLTAGE .........................................................................................................................................................................32
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 33
FUNCTION TABLE OF IC................................................................................................................................................ 38
FL DISPLAY......................................................................................................................................................................45
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (For U.S.A. Only)
CD-C612
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
SERVICE MANUAL
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
CD-C612 mini component system consisting of CD-C612 (Main unit),
CP-C612 (Front speaker) and GBOXS0024AWM1 (rear speaker ).

CD-C612
– 2 –
Compact disc player section
Type: 3-disc multi-play compact disc
player
Signal readout: Non-contact, 3-beam semi-
conductor laser pickup
D/A Converter: 1-bit D/A converter
Frequency response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)
Front speaker section
Type: 2-way type [5" (13 cm)
woofer and super tweeter]
Maximum input power: 30 W
Rated input power: 15 W
Impedance: 5.4 ohms
Dimensions: Width; 8-11/16" (220 mm)
Height; 11-13/16" (300 mm)
Depth; 8-3/6" (213 mm)
Weight: 6.5 lbs. (2.9 kg)/each
Rear speaker section
Type: 4" (10 cm) full range speaker
Maximum input power: 10 W
Rated input power: 5 W
Impedance: 16 ohms
Dimensions: Width; 6-3/4" (170 mm)
Height; 6-3/4" (170 mm)
Depth; 3-1/2" (88 mm)
Weight: 1.0 lbs. (0.5 kg)/each
General
Power source: AC 120 V, 60 Hz
Power consumption: Stand-by; 0.3 W
Power on; 50 W
Dimensions: Width; 10-5/8" (270 mm)
Height; 11-13/16" (300 mm)
Depth; 13-7/8" (353 mm)
Weight: 11.7 lbs. (5.3 kg)
Amplifier section
Output power: 20 watts minimum RMS per
channel into 4 ohms from 80 Hz
to 20 kHz, 10 % total harmonic
distortion
Output terminals: Front speakers; 5.4 ohms
Rear speakers; 16 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
Input terminals: Video/Auxiliary (audio signal);
500 mV/47 kohms
Tuner section
Frequency range: FM; 87.5 - 108 MHz
AM; 530 - 1,720 kHz
Cassette deck section
Frequency response: 50 - 14,000 Hz (Normal tape)
Signal/noise ratio: 55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/
playback)
Wow and flutter: 0.15 % (WRMS)
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
IMPORTANT SERVICE NOTES (For U.S.A. Only)
BEFORE RETURNING THE AUDIO PRODUCT
(Fire & Shock Hazard)
Before returning the audio product to the user, perform the
following safety checks.
1. Inspect all lead dress to make certain that leads are not
pinchedorthathardwareisnotlodgedbetweenthechassis
and other metal parts in the audio product.
2. Inspect all protective devices such as insulating materials,
cabinet,terminalboard,adjustmentandcompartmentcovers
or shields, mechanical insulators etc.
3. To be sure that no shock hazard exists, check for leakage
current in the following manner.
* Plug the AC line cord directly into a 120 volt AC outlet.
* Using two clip leads, connect a 1.5k ohm, 10 watt resistor
paralleled by a 0.15µF capacitor in series with all exposed
metal cabinet parts and a known earth ground, such as
conduit or electrical ground connected to earth ground.
* Use a VTVM or VOM with 1000 ohm per volt, or higher,
sensitivity to measure the AC voltage drop across the
resistor (See diagram).
* Connect the resistor connection to all exposed metal parts
havingareturnpathtothechassis(antenna,metalcabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.
AllcheckmustberepeatedwiththeAClinecordplugconnection
reversed.
Anyreading of0.3 voltRMS (thiscorresponds to0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
TEST PROBE
0.15 µF
1.5k ohms
10W
VTVM
AC SCALE
CP-C612
GBOXS0024AWM1
Specifications for this model are subject to change without
prior notice.
SPECIFICATIONS
CD-C612

– 3 –
CD-C612
NAMES OF PARTS
CD-C612
■Front panel
11. Disc Tray
12. Disc Skip Button
13. Open/Close Button
14. Extra Bass Indicator
15. FM Stereo Mode Indicator
16. FM Stereo Indicator
17. (CD) Repeat Indicator
18. (CD) Play Indicator
19. (CD) Pause Indicator
10. Spectrum Analyzer/Volume Level Indicator
11. (TAPE 2) Record Indicator
12. (CD) Disc Number Indicators
13. (CD/TUNER) Memory Indicator
14. Timer Play Indicator
15. Timer Record Indicator
16. Sleep Indicator
17. (TAPE 2) Record Pause Button
18. (CD) Track Down/Review Button
3 (TUNER) Preset Down Button
3 (TAPE 2) Rewind Button
19. (CD) Track Up/Cue Button
3 (TUNER) Preset Up Button
3 (TAPE 2) Fast Forward Button
20. Timer/Sleep Button
21. Clock Button
22. Timer Set Indicator
23. Power Button
24. Equalizer Mode Selector Button
25. Dimmer Button
26. Extra Bass/Demo Mode Button
27. Function Selector Buttons
28. Memory/Set Button
29. (CD/TAPE) Stop Button
30. (TAPE) Play Button
3 (CD) Play/Repeat Button
31. Tuning and Time Up/Down Buttons
32. Volume Up/Down Buttons
33. Headphone Socket
34. (TAPE 1) Cassette Compartment
35. (TAPE 2) Cassette Compartment
12
4
5
6
7
8
9
10 11
15
16
12 13
14
17 18 19
31
20
21 24
25
22 26
33
27 28 29 30 32
23
35
34
3

CD-C612
– 4 –
CP-C612
GBOXS0024AWM1
■Rear panel
11. AC Power Input Socket
12. FM/AM Loop Aerial Socket
13. Video/Auxiliary (Audio Signal) Input Sockets
14. Rear Speaker Terminals
15. Front Speaker Terminals
2
4
13
5
■Front speaker
11. Super Tweeter
12. Woofer
13. Bass Reflex Ducts
14. Speaker Wire
■Rear speaker
11. Full-Range Speaker
12. Speaker Wire
1
2
34
1
2
■Remote control
11. Remote Control Transmitter LED
●CD control section
12. Disc Number Select Buttons
13. Memory Button
14. Pause Button
15. Clear Button
16. Track Down/Review Button
17. Track Up/Cue Button
18. Disc Skip Button
19. Play/Repeat Button
10. Stop Button
11. Random Button
●Tuner control section
12. Preset Up/Down Buttons
●Tape control section
13. (TAPE 1) Play Button
14. (TAPE 2) Record Pause Button
15. (TAPE 1/2) Stop Button
16. (TAPE 2) Play Button
17. (TAPE 2) Rewind Button
18. (TAPE 2) Fast Forward Button
●Common section
19. Equalizer Mode Selector Button
20. Function Selector Buttons
21. Power Button
22. Extra Bass Button
23. Volume Up/Down Buttons
1
8
3
410
9
5
6
7
11
12
13 14 16 17 18
20
19
21 23
2
15
22

– 5 –
CD-C612
OPERATION MANUAL
SETTING THE CLOCK
1
Press the POWER button to enter the stand-by mode.
2
Press the CLOCK button.
3
Within 5 seconds, press the MEMORY/SET button.
4
Press the TUNING/TIME ( or ) button to select the time display mode.
"AM 12:00" →The 12-hour display will appear. (AM 12:00 - PM 11:59) "AM 0:00" →The 12-hour display will appear. (AM 0:00 - PM 11:59) "0:00" →The 24-hour display will appear. (0:00 - 23:59)
●Note that this can only be set when the unit is first installed
or it has been reset (see page 17).
5
Press the MEMORY/SET button.
6
Press the TUNING/TIME ( or ) button to adjust the hour.
●Press the TUNING/TIME ( or ) button once to advance
the time by 1 hour. Hold it down to advance continuously.
●When the 12-hour display is selected, "AM" will change auto-
matically to "PM".
7
Press the MEMORY/SET button.
8
Press the TUNING/TIME ( or ) button to adjust the minutes.
●Press the TUNING/TIME ( or ) button once to advance
the time by 1 minute. Hold it down to change the time in 5 minute intervals.
●The hour setting will not advance even if minutes advance from
"59" to "00".
9
Press the MEMORY/SET button.
●The clock starts operating from "0" seconds. (Seconds are not
displayed.)
Note: ●In the event of a power failure or when the AC power cord is
disconnected, the clock display will go out. When the AC power supply is restored, the clock display will flash on and off to indicate the time when the power failure occurred or when the AC power cord was disconnected.
CLOCK
POWER
MEMORY/ SET
TUNING/ TIME ( )
AM 12:00 AM 0:00 0:00
2 3
4
7
6 5
8 9
If this happens, follow the procedure below to change the clock time.
To change the clock time:
①
Press the CLOCK button.
②
Within 5 seconds, press the MEMORY/SET button.
③
Perform steps 6 - 9 above.
To see the time display:
Press the CLOCK button. ●The time display will appear for about 5 seconds.
To change the time display mode: ①
Perform steps 1 - 2 in the section "RESETTING THE MICROCOMPUTER"
②
Perform steps 1 - 9 above.
(Main unit operation)
In this example, the clock is set for the 12- hour (AM 12:00) system.
RESETTING THE MICROCOMPUTER
Reset the microcomputer under the following conditions: ●To erase all of the stored memory contents (clock and timer
settings, and tuner and CD presets).
●If the display is not correct. ●If the operation is not correct.
1
Press the POWER button to enter the stand-by mode.
2
While pressing down the button and the but- ton, hold down the POWER button for at least 1 second.
Caution: ●The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD presets.
2
1,2

CD-C612
– 6 –
MINI COMPONENT SYSTEM
Quick Guide/Guía rápida
CD-C612
●Remote control x 1 ●
Controlador remoto x 1
●2 “AA” batteries ●
Dos pilas “AA”
Remote Sensor Sensor remoto
2
Preparation for use /
Preparación para su uso
1
Check the supplied accessories /
Compruebe los accesorios suministrados
●FM/AM loop antenna x 1 ●
Antena de cuadro de
FM/AM x 1
●Batteries are not included. ●
Las pilas no están incluidas.
8” - 20’ (0.2m - 6m) 0,2m - 6m
■Speaker connection ■
Conexión de los altavoces
■Antenna connection ■
Conexión de las antenas
Rear speaker (Right)
Altavoz trasero (Derecho)
Rear speaker (Left)
Altavoz trasero (Izquierdo)
Front speaker (Right) Altavoz delantero
(Derecho)
Front speaker (Left) Altavoz delantero
(Izquierdo)
●AM Loop Antenna ●
Antena de cuadro
de AM
●FM Antenna ●
Antena de FM
●AC 120 V, 60 Hz ●
120 V de CA, 60 Hz
■Turning the power on and off ■
Conexión y desconexión de la alimentación
■Remote control ■
Controlador remoto
POWER
POWER
Red Rojo
Red Rojo
Wire with the white line Cable con la
línea blanca
Wire with the white line Cable con la
línea blanca
●AC power cord x 1 ●
Cable de alimentación de CA x 1
Black Negro
15
15
3
Listening to a CD /
Audición de discos CD
4
Listening to a tape /
Audición de una cinta
5
Listening to the radio /
Audición de la radio
6
Recording from CDs /
Grabaciones de discos CD
7
Sound control /
Control del sonldo
●Label facing up ●
Etiqueta hacia arriba
■To stop the playback ■
Para detener la reproducción
■To stop the playback ■
Para detener la reproducción
●Load the disc to be recorded. ●
Introduzca el disco
que va a grabar.
●CD recording starts. ●
La grabación de
CD empieza.
■Volume ■
Volumen
■Extra bass (X-BASS) ■
Graves extra (X-BASS)
■Pre-programmed equalizer ■
Ecualizador preprogramado
VOLUME
FLAT HEAVY-1 HEAVY-2
SOFT-2 SOFT-1 VOCAL
■To stop the playback ■
Para detener la reproducción
TAPE 1 TAPE 2
TAPE 2

– 7 –
CD-C612
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3.Takeoffnylon bands orwireholders where theyneedto
beremovedwhendisassemblingtheunit.Afterservicing
theunit,besure to rearrangetheleads where theywere
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 7-2
Figure 7-3
CD-C612
1 Top Cabinet 1. Screw ..................... (A1) x4 7-1
2 Side Panel 1. Screw ..................... (B1) x6 7-1
(Left/right) 2. Hook....................... (B2) x2
3 CD Player Unit/ 1. Turn on the power supply, 7-2
CD Tray Cover open the disc tray, take out
the CD cover, and close.
(Note 1)
2. Hook....................... (C1) x3
3. Hook....................... (C2) x2
4. Socket .................... (C3) x2
4 Back Board 1. Screw ..................... (D1) x4 7-2
5 Main PWB 1. Screw ..................... (E1) x10 8-1
Display PWB/ 2. Bracket ................... (E2) x2
Switch PWB 3. Socket .................... (E3) x5
Headphones PWB 4. Hook....................... (E4) x2
6 Front Panel 1. Screw ..................... (F1) x2 8-1
2. Hook....................... (F2) x2
7 Tape Mechanism 1. Open the cassette holder. 8-2
2. Screw...................... (G1) x6
8 CD Servo PWB 1. Screw ..................... (H1) x1 8-3
(Note 2) 2. Socket .................... (H2) x4
9 Turntable 1. Screw ..................... (J1) x1 8-4
2. Stabilizer ................ (J2) x1
10 Disc Tray 1. Screw ..................... (K1) x2 8-4
2. Guide ..................... (K2) x2
11 CD Changer 1. Screw ..................... (L1) x4 9-1
Mechanism
12 CD Mechanism 1. Screw ..................... (M1) x1 9-1
STEP REMOVAL PROCEDURE FIGURE
Note 1:
How to open the changer manually. (Fig. 7-3)
1. Turn fully the lock lever in the arrow direction through the
hole on the loading chassis bottom in this state.
After that, push forward the CD player base.
Note 2:
1.Afterremoving theconnectorfor theopticalpickup fromthe
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
Figure 7-1
CD-C612
Lock Lever
Top Cabinet
(A1)x2
ø3x12mm
(A1)x2
ø3x12mm
(B1)x1
ø3x10mm
(B1)x1
ø3x10mm
(B1)x2
ø3x12mm
Hook
(B2)x1
Hook
(B2)x1
Side Panel
(Left)
Side Panel
(Right)
Back Board
Front Panel
(B1)x2
ø3x12mm
Back Board
CD Player
Unit
Hook
Pull
(C2)x1
(D1)x4
ø3x10mm
Front Panel
2
Main PWB
1
Disc Tray
CD Tray Cover
Hook
(C1)x3
1
(C3)x2
CD Servo
PWB
Hook
Pull
(C2)x1

CD-C612
– 8 –
Figure 8-1
Figure 8-2
Figure 8-3
Figure 8-4
(H1)x1
ø3 x10mm
(H2)x2
(H2)x2 CD Player Unit
CD Servo
PWB
(K1)x1
ø3 x10mm
(K1)x1
ø3 x10mm
(J1)x1
ø3 x10mm
Turntable
Disc Tray
(J2)x1
(K2)x1
(K2)x1
CD Player Unit
Washer
Front Panel
Switch PWB Display PWB
Hook
(F2)x1
Hook
(F2)x1
Hook
(E4)x2
Tape
Mechanism
PWB
Tape
Mechanism
(E3)x1
(E3)x3
(E3)x1
Main
PWB
(E1)x8
ø3x10mm
(E1)x1
ø3x10mm
Headphones
PWB
(E1)x1
ø3x10mm
(E2)x1
(E2)x1
(F1)x2
ø3x10mm
Front Panel
Open
Cassette
Holder
(Left/Right)
Tape
Mechanism
(G1)x6
ø3x10mm

– 9 –
CD-C612
CP-C612
1 Front Speaker 1. Front Panel ............ (A1) x1 9-1
2. Tip .......................... (A2) x2
3. Screw ..................... (A3) x4
STEP REMOVAL PROCEDURE FIGURE
CP-C612
Figure 9-2
Note:
The rear speakers can be easily disassembled.
Therefore the disassembling method is not discribed.
For details refer to the disassembling drawing in the Parts
Guide.
Screw Driver
Woofer
Piezo (A3)x4
ø4x12mm (A2)x2
Front Panel
(A1)x1
Be careful when installing the CD changer mechanism.
InstalltheCDchangermechanismontheCDplayerbaseafter
the shift lever has been set in the highest position.
Figure 9-1
(L1)x4
ø3 x12mm
(M1)x1
ø2.6 x10mm
CD Changer
Mechanism
CD Mechanism
Shift Lever
CD Player Base

CD-C612
– 10 –
MECHANISM SECTION
•Driving Force Check
Torque Meter Specified Value
Play: TW-2412 Tape 1: Over 80 g
Tape 2: Over 80 g
•Torque Check
Torque Meter
Tape 2
Play: TW-2111 30 to 60 g. cm 30 to 60 g.cm
Fast forward: TW-2231 — 60 to 120 g.cm
Rewind: TW-2231 — 60 to 120 g.cm
Specified
Value
Adjusting
Point Instrument
Connection
Test Tape
Normal MTT-111 Volume in 3,000 ±Speaker
speed motor. 30 Hz terminal
(MM1) (Load
resistance:
8 ohms)
ADJUSTMENT
Specified Value
Tape 1
•Tape Speed
How to remove the pickup (See Fig. 10-2)
1.Removethescrews (B1) x 2pcs.,toremove the shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Figure 10-2
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Perform steps 1, 2, 3 and 8-12 of the disassembly method to
remove the CD mechanism.
How to remove the loading motor
(See Fig. 10-1)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
Figure 10-1
( A1 ) x2
ø2.6 x5mm
Loading / Up
/ Down Motor
Motor
PWB
( B1 ) x2
ø2.6 x6mm
Shaft
( B2 ) x1
Stop Washer
( B3 ) x1
Gear
( B4 ) x1
CD Mechanism
Pickup
Note
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
TAPE MECHANISM
MM 1
Motor
Volume in motor

– 11 –
CD-C612
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
IF 450 kHz 1,720 kHz T351 *1
Band — 530 kHz (fL): T333 *2
Coverage 1.1 ±0.1 V
Tracking 990 kHz 990 kHz (fL): T331 *1
Test Stage Frequency Frequency
Display Setting/
Adjusting
Parts
Instrument
Connection
*1. Input: Antenna, Output: TP301
*2. Input: Antenna, Output: Speaker terminal
•FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Band — 87.50 MHz L303(fL): *1
Coverage 3.4 V ±50 mV
RF 98.00 MHz 98.00 MHz L302 *2
(10-30 dB)
Test Stage Instrument
Connection
Frequency Frequency
Display Serring/
Adjusting
Point
•Detection
Signal generator: 10.7 MHz, FM sweep generator
Detection 10.7 MHz 98.00 MHz T352 Input: Pin 1 of
IC303
Output: TP302
IF 10.7 MHz 98.00 MHz T301(Turn Input: Pin 1 of
the core of IC301
transformer Output: TP302
T352 fully
counter-
clookwise.)
Instrument
Connection
Test
Stage Adjusting
Parts
Frequency
Display
Frequency
Adjusting
Parts Instrument Connection
Frequency
Display
Frequency
•VCO Frequency
* Adjust for 76 kHz ±200 Hz.
Notes:
After preparing the test circuit shown in Fig 11-2, connect the
Pin 13 , Pin 21 and ground of the IC303 with test circuit, and
measure the Value.
At this time, apply a standard unmodulated signal input and
adjust the VCO.
Figure 11-2
98.00 MHz 98.00 MHz VR351* Pin 13, Pin 21
(60 dB) and ground
of IC303
Figure 11-1 ADJUSTMENT POINTS
Pin 13 of IC303 Pin 21 of IC303
D
G
S
10 kΩ
TO FREQUENCY
COUNTER
FET : 2SK19 or 2SK54
MAIN PWB
CNP301
FM Band
Coverage
fL
TP301
VCO
AM IF
FM RF
FM DET
FM IF
AM Tracking
fL
AM Band
Coverage fL
TP302
IC302
T331
T352
CF351 T351
CF301
IC303
C356
R361
T333
VR351
L303
IC301
T301 L302
BF301
1
11
12 22
1
12
13 21 24
1
9
CD ERROR CODE DESCRIPTION
When a malfunction occurs during CD operation, an error
code will be displayed to identify the function in CD operation
which failed.
Error State Code
0001 Cannot detect puin SW
0101 Tray close operation error
0105 Tray close operation error
0201 Tray open operation error
0203 Tray open operation error
0304 Disc skip operation error
0305 Disc skip operation error
0307 Disc skip operation error

CD-C612
– 12 –
TEST MODE
Figure 12-2 Figure 12-3
Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
• Automatic adjustment item
1. Focus offset (Fig. 12-2)
2. Tracking offset (Fig. 12-3)
3. E/F balance (tracking error balance) (Fig. 12-4)
4. RF level AGC function (HF level: constant)
5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc is changed. Therefore,
each disc is played back using the optimal settings.
CD SECTION Figure 12-1
Note:
Only in STOP state it is possible to slide the pickup with the ( ) or ( ) key.
VOL. --- Last memory
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
Canceling method - POWER OFF
• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TST mode (Fig. 12-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the ( ) or ( ) key.
<MEMORY>
LASER ON
<PLAY> key input Press <STOP> key. Stop
TOC. IL is performed, and the ordinary PLAY is performed.
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15
<MEMORY>
Tracking on the spot.
SERVO OFF PLAY
<MEMORY>
Tracking on the spot.
SERVO ON PLAY STOP
Figure 12-4
IL is not performed.
<STOP>
1 2 3
2
0.1s
0.50 V
IC1 20 FE
0.1s
0.50 V
IC1 7 TE
1
FOCUS
OFF-SET
ADJUST
TRACKING
OFF-SET
ADJUST
2
1
10ms
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
Enlarged
View
TRACKING
OFF-SET
ADJUST
2
1
TO
TE
200 ms
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
TRACKING/
ERROR
BARANCE
ADJUST

– 13 –
CD-C612
•The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis with no signal given.
1. In the tuner section,
( ) indicates AM
< > indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
( ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
•Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
NOTES ON SCHEMATIC DIAGRAM
•Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
•Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolyticcapacitor,theexpression“capacitance/withstand
voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
•Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.
REF. NO DESCRIPTION POSITION POSITION
SW716 TAPE ON—OFF
SW717 CD ON—OFF
SW722 FF ON—OFF
SW723 TUNING UP ON—OFF
SW724 TUNING DOWN ON—OFF
SW725 PLAY ON—OFF
SW726 VOLUME DOWN ON—OFF
SW727 VOLUME UP ON—OFF
SW728 X-BASS/DEMO ON—OFF
SW729 EQUALIZER ON—OFF
SW730 DIMMER ON—OFF
SWM 3 FOOL PROOF ON—OFF
SWM 4 F.A.S. ON—OFF
SWM 5 CAM ON—OFF
REF. NO DESCRIPTION
SW1 OPEN/CLOSE ON—OFF
SW2 MECHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW701 POWER ON—OFF
SW703 CLOCK ON—OFF
SW704 TIMER/SLEEP ON—OFF
SW708 DISC SKIP ON—OFF
SW709 OPEN/CLOSE ON—OFF
SW710 REV ON—OFF
SW711 REC PAUSE ON—OFF
SW712 MEMORY/SET ON—OFF
SW713 STOP ON—OFF
SW714 TUNER/BAND ON—OFF
SW715 VIDEO ON—OFF
Figure 13 TYPES OF TRANSISTOR AND LED
SVC211C
SVC348S
KTC3200 GR
2SC3331
2SA1015GR
2SC535C
KTA1274 Y
KTD2058 Y
KRA102 M
KRA109 M
KRC102 M
KRC104 M
KRC107 M
KTA1271 Y
KTA1273 Y
KTC3203 Y
FRONT
VIEW
E C B
(S)(G)(D)
(1) (2) (3)
2SA1318
FRONT
VIEW
B C E
(D)(G)(S)
(3) (2) (1)
1 2 3 SLI342UCJ1
VIEW
FRONT

CD-C612
– 14 –
WAVEFORMS OF CD CIRCUIT
3
5ms
0.50 V
IC1 20 F.E
1
5ms
5.0 V
IC1 54 DRF
STOP PLAY
FOCUS SERCH
1
3
5
4
2
6
7
8
9
10
11
3
4
5
6
7
8
9
6
7
8
10
11
12
9
6
7
8
9
12
0.5ms
1.00 V
HF
0.5ms
5.0 V
HFL
0.5ms
5.0 V
TES
1
2
3
CUE
0.5ms
1.00 V
HF
1
2
3
0.5ms
5.0 V
HFL
0.5ms
5.0 V
TES
REVIEW
50ms
10.0 V
JP+
CUE
50ms
10.0 V
JP-
50ms
0.50 V
JP
50ms
1.00 V
TE
0.5ms
10.0 V
JP+
0.5ms
10.0 V
JP-
0.5ms
0.50 V
JP
0.5ms
1.00 V
TE
REVIEW
50ms
10.0 V
JP+
50ms
10.0 V
JP-
50ms
0.50 V
JP
50ms
1.00 V
TE
0.5ms
10.0 V
JP+
0.5ms
10.0 V
JP-
0.5ms
0.50 V
JP
0.5ms
1.00 V
TE
PLAY
20ms
1.00 V
SPO
NORMAL DISC
TN0=01
20ms
2.00 V
CLV+
PLAY
TCD-712 (140mm)
TN0=01
50ms
1.00 V
SPO
50ms
2.00 V
CLV+
PLAY
TCD-712
5s
100mV
SLD
1
0.5s
100mV
SLD
1

CD-C612
– 15 –
Figure 15 BLOCK DIAGRAM (1/3)
27
12341
67
18244020
45
15
23
16 26 27
2
25
20
3839284142 37 36
PU-IN SW
XL1
16.93MHz
XIN
LD0
FIN2 JP–
CV+
SLC
SL1
FIN1 E F
TO
FD
SPO
SP
SLD
SL–
SL+
DRF
CL
DAT
CE
VCC1
5
+5V
SW4
PICKUP IN
FOCUS COIL
TRACKING COIL
M1
SPINDLE
MOTOR
M
M
M2
SLED
MOTOR
PICKUP UNIT
9
IC2
LC78622N
SERVO/SIGNAL
CONTROL
+B1
IC3
M63001FP
FOCUS/
TRACKING/
SPIN/SLED
DRIVER
IC1
LA9241M
SERVO AMP.
/RES. /CQCK. COIN SQOUT. RWC. WRQ
~
~
~
CL, DAT, SELIAL CONTROL/CE
Q51
SL+. SL–. DRF
987654321
GND (D) MECHA UP GND (D) DISK NO. OPEN/CLOSE GND (D) M– M+
987654321
CNP10
M
+5V
+B1
62
64
45
36
23
43
37 36 38
40 24 25
10
123456
10
26
58
53
1012 20
32 40 43 44
53
52
51
54
31
30
29
23
27
16
15
41
44
Q1
Q52
+4.3V
+7V
VOLTAGE
REGULATOR
TO MAIN SECTION
(TO IC601)
XOUT
EFMO EFMIN CLV+ JP–
CONT2 CONT1
LCHO
LVDD
LVSS
RCHO
ISET
VDD
LVDD
RVDD
XVDD
SW1 OPEN/CLOSE
SW2 MECHA UP SW3 DISC NUMBER
M3 TURNTABLE UP/DOWN LOADING MOTOR
SOLM2 SOLENOID
TO DISPLAY
SECTION
CNS10
+B5
CNP11
RVSS
39
CONT4
SWITCHING
REGULATOR
LASER DRIVER
6
VVDD
CONT3
17
–
+
SOL– SOL+
8
29
35
14
~~
21
22

CD-C612
– 16 –
Figure 16 BLOCK DIAGRAM (2/3)
5 6
21
22
13
20
16
21
1 3
24 23
15
20
1
22
15
9
10
11
7
11
3 4 5 6
10
GNDAM IF FM DET
FM DET
FM IN
IC302
LC72131
PLL (TUNER)
OSC
VR351
MPX VCO ADJ
AM IF AMIF
AM MIX
AM IN AM+B
AM RF IN
X352
4.5MHz
FMOSC
AM TRACKING AM BAND
COVERAGE
T351
+B4 +B4
T352
IC303
LA1805
FM/AM IF MPX.
L
R
STEREO
AM OSC IN
Q343
VT
DO DI CL CE
1
24
2
23
3
4
4
21
5
20
6 7
17
8
9
16
10
14
12
13
18
H/N
T1/T2
R-CH
L-CH
L-CH
R-CH
P.B
REC
TAPE 2
TAPE 1
L NF
L(T1)
R(T1)
L(T2)
R(T2)
R NF
L
R
POP REDUCE
L REC
R REC
L
R REC
P.B.
REC
ALC
NOR/
HIGH T1/T2
REF L NF
R NF
PB HEAD
REC PB HEAD
SWITCHING
Q103~Q106
AC BIAS
IC101
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.
PB
ERASE
HEAD
SWITCHING BAIS
Q126
Q124
L103
Q128
L104
Q111
Q110
Q109
Q107
Q108
SWITCHING SWITCHING
SWITCHING
+B4
1
2
3
CNS11
FROM CD SECTION
CNP11
17
+B4
VOLTAGE
REGURATER
SWM3
FOOL PROOF
SWM4
F.A.S
SOLM1
SOLENOID
SWM5
CAM
5
16
4
17
3
18
2
19
1
20
9
IC601
M62439SP
AUDIO PROCESSOR
L
R
L
RL
R
L
R
L
R
TUNER
AUX
TAPE
CD
3
IC704
1
+B7 2
MUTING
Q121
Q122
FM/AM
SWITCHING
13
8
9
131
2 3 4 5 7 8
6
Q302
FM IF IN
FM IF FM IF
FM RF
FM
OSC
T301
FM OSC
FM
ANTENNA
FM B.P.F
IC301
TA7358AP
FM FRONT END
L303
L302
OSC BUFF
BF301
7
FM
Q344
FM +B
SWITCHING
CF301
FM+B MO/ST
VCO
FM/AM
BIAS
OCS
15 19
11 10
MON
O
JK601
VIDEO
AM LOOP
ANTENNA
T331 T333
CF351

CD-C612
– 17 –
Figure 17 BLOCK DIAGRAM (3/3)
Q704
15
9
10
1
D
J
L
R
43
+
B4
3
F
1 2 3 4
15 2516 26 28 373839
FL701
DISPLAY
9 8 7 6 5 4 3 2 1
IC701
IX0280AW
SYSTEM CONTROL
MICROCOMPUTER
O
R
L
R
VDD
UNSWITCH
+B7
MEMORY
BACK UP
VDD
XL701
4.19MHz
+B5 +B7
KEY
SW701,
SW703,704,
SW708~717,
SW722~730
TO CD
SECTION
JK970
HEADPHONES
SO961
SPEAKER
TERMINAL
T.F
T801
POWER
TRONSFORMER
RL801
AC POWER
SUPPLY CORD
AC 120V 60Hz
T802
POWER
TRONSFORMER
Q803
Q802
+B6
+B7 UNSWITCH
3
04
2
BAIS
T1/T2
REC
–B4
G
D801
D803~D806
Q801 D807
~D809
2 3
1
+B7
RX701
LED722
Q705
Q706
Q707
7
2
5 L-OUT
IC961
LA4451
POWER AMP.
+B R-OUT
13
8
Q601
Q602
ZD801
Q603
Q604
+B1
+B4
+B5
+B2
+7.3V
+12V(ANALOG)
+12V(MOTOR)
+5.6V
+5V
Q821
Q822
Q824
Q823
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
Q702
Q703
AVDD
O
/ST
/
AM
~~~
13
9
3
4
101112131415161718192021222324
25
2627
282930
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
7170696867666564636261 80797877
767574
737260595857
56
5554
535251
MONO/ST
VDD
PHM1
D810~D813
FRONT
FRONT
SPEAKER
REAR
SPEAKER
F803
4A/125V
F805
2A/250V
29 36
~
M
MM1
TAPE MOTOR
+B7
+B7

CD-C612
– 18 –
Figure 18 SCHEMATIC DIAGRAM (1/10)
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 13.
D1
1SS133
C76
0.022
C77
100/16
0
R1
22
C20
47/16
C82
100/16
C55
100/16
R56 22K
C36
100/16
IC3
M63001FP
FOCUS/TRACKING/SPIN
/SLIDE DRIVER
R
1
0
C25
27P R39
1K
C15
0.01
R41
47K
R43
56K
R44
33K
R42
47K
C17
0.001
R30
6.8K
C3
1/50
R11
6.8K
C6
0.033
R10
2.2K C5
0.033
C54
0.001
R9
100K
C16
0.0047
R27
39K
R25
1.5K
R23
10K
R24
47K
R17
33K
C29
4.7/50
C28
0.1
C14
0.01
C4
0.1/50
C35
1/50
Q1
2SA1318
R18
15K
C11
0.1
IC1
LA9241M
SERVO AMP.
4
8
4
7
6
4
4
5
4 4
43
42
41
40
39
38
37
36
35
34
33
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C13
330P
R26
82K
R37
82K
C19
1/50
R33
1.2K R32
10K
C32
0.01
C31
220/6.3
C30
0.1/50
C27
0.001
C24
2.2P
R40
5.6K
C26
0.033
R31
1.2K
C18
0.47/50
R16
3.3K
R15
12K C10
180P
C8
0.068
C7
0.1/50
R12
100
C9
0.047
R13
1K
R14
27K
C12
0.1
R2
1K
C1
47/16
C2
0.01
R46
560
R38
470
C23
0.0027
R45
4.7K
C22
220P
C34
0.33/50
C33
0.47/50
NC
(SPN)VCC2
VCC4
LD
VR
PD
FO–
FO+
TR+
TR–
ACTUATOR
FO+
FO–
TR–
TR+
1M
2200P
1M
2200P
K
F
B
E
A
F
B
A
E
K
LD_M+
LD_M–
VCC3
M–
M+
SOL+
SOL–
SP–
SP+
SPO
SOL–
SOLD
MUTE
Vref
STANDBY
VCC1
SLD
SL–
SL+
GND
GND
TR+
TR–
FO–
FO+
FO (GAIN)
FD
TO
GND
LD
VR
PD
GND
FO–
FO+
TR+
TR–
TP1
HF
TE
TBC
JPCLO
SLOF
SLOF
SLOF
FSC
FE1
FOSTA
FSC
EFBAL
REF
JP
REF
CV–REF
CV+
JP–
JP+
VREF
2FREQ
LASER
8/12CM
FSTA
S.Q.R
FOSTA
TOSTA
LATOH
FSTA
SLOF
CL
CE
DRF
HFL
DEF
VCC
THD GL
THDL
TGL1
VCR
VCR
VCR VCR
FE1
REF
–
+
–
+–
+
–
+
REF
RF
REF
DGND
SLI
FIN2
FIN1
F
E
TB
TE–
TE
TESI
SCI
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF TO
REF
REF
JP
REF
TH
TD
TD–
JP
TO
FD
GEN
GEN
GEN
FD–
FA– FA
FE
FE–
AGND
SP
SPI
SPG SP–
SPO
SLEO
SLD
SL– SL+
REF
REF
REF
REF OR
REF
RF
SLC
RFSM
JP–
JP+
TGL
TOFF
TES
HFL
SLOF
CV–
CV+
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
1
1
2
2 33
4
4
5
5
CNP1
1
2
3
4
5
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8 7 8
CNP2
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
21
20
19
34
33
32
31
30
29
28
27
26
25
24
23
22
36
35
37
38
39
40
41
42
6
5
4321
CNP12
1
2
3
4
5
6
CNP3
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
CNS1A
CNS1B
B
K
A
F
E
LASER DRIVER
+B
+B
+B
+B
+B
P
2
FROM
D
C
RWC(DSP) RES(DSP) WRQ(DSP)
DRF (ASP)
CQ CK(DSP) CO IN(DSP) SQ OUT(DSP)
1
2
3
4
5
6
SW4
PICKUP IN
SPIN
SLIDE
PU-IN
+
–
–
+
1
2
3
4
5
6
CNS3B CNS3A
M
M1
SPINDLE
MOTOR
M
M2
SLID
MOTOR
CNS2A
CNS2B
1/16
R8
15K
RFS–
R36
220K
R35
220K
R34
1K
C21
0.0033
R20
1K
R19
1K
R21
1.5K
R22
820
FO–
FO+
TR+
TR–
PD
LD
CD_GND
CD_PUIN
SL_–
SL_+
SP–
SP+
CD MOTOR
PWB-C
PICKUP UNIT
VCC1 LDS
LDO
BHI
LF2
PHI
VR
REF1
FSS
VCC2
DRF
DEF
CLK
CL
DAT
CE
NC
– +
– +
– +
– +
–
+
–
+
–
+
–
+
– +
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
– +
–
+
–
+
–
+
–
+
R28 10K R29 56K
CNP3A
GND
• The numbers 1 to 12 are waveform numbers shown in page 14.

CD-C612
– 19 –
Figure 19 SCHEMATIC DIAGRAM (2/10)
78 9 10 11 12
R84
2.2K
IC2
LC78622N
R55
100
C57
0.001
D82
1SS133
C83
0.022
R80
820 R81
820
Q51
KRC102 M
D92
1SS133
D93
1SS133
R83
390
R82
390
C56
0.022
R91 1K
D91
1SS133
Q52
KTC3203 Y
C52
100/16
R64
22
R66
220
ZD61
MTZJ5.6B
C51
100/16
C50
0.022
L61
0.82µH
C37
0.022
R47
10K
C46
100P
(CH)
R51
3.3M
R88 1.2K
R93
220
D81
1SS133
C45
100P(CH)
C44
100P(CH)
R89 1.2K R90 220
R50
680
C39
0.047
C40
0.047
R52
27K
R60
1K
R57 1K
R58 1K
R61 1K
R59 1K
C38
0.01
R63
1K
R62 1K
C49
100P(CH)
C48
100P
C43
330/6.3
R74
100K
R73
100K
C73
220P C74
220P
R53
1.2K
P
C47
100P(CH)
C75
0.001
C72
10/50
R71
2.7K
R72
2.7K
NC
NC
CD_RCH
A_GND
X1
16.93MHz
+5V
TEST5
/CS
TA1
SOL+
SOL–
M+
M–
GND(D)
OPEN CLOSE
DISC NO.
GND(D)
MECHA UP
GND(D)
2KX8
RAM
1BIT
DAC
SERVO
COMMAND
TES
HLF
V/P
CLV-
CLV+
TEST2
EFMIN
EFMO
VSS
FR
VVDD
ISET
VVSS
PDO
DEF1
TOFF TGL JP+ JP_ PCK
FSEQ
VDD
CONT1 CONT2 CONT3 CONT4
CONT5
EMPH C2F
CLV
DIGITAL
SERVO
EXTERNAL
OUTPUT
SYNC-DETECT
EFM DEMODULATE
SLICE
LEVEL
CONTROL
VCO
CLOCK
OSC
CONTROL
ERROR
COERECT
FLAG
CONTROL
DIGITAL
OUT
TEST3 DOUT
4FS
DIGITAL
FILTER
TEST1
TEST4
MUTEL(NC)
LVDD
LCHO
LVSS
RVSS
RCHO
RVDD
XVDD
XOUT
XIN
XVSS
SUB-CODE
µ-COM
INTERFACE
TEST11
SBCK
SFSY
PW
FSX
WRQ
RWC
SQOUT
COIN
/CQCK
/RES
16M
4M
X-TAL
GENERATOR
64 63 61
62 60 59 58 57 56 55 54 53 52 51 50 49
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
3
2
1
48
47
45
44
43
42
41
40
39
38
37
36
35
34
33
16
15
14
13
12
11
10
9
8
7
6
5
4
46
2
3
4
5
6
1
7
8
9
10
2
3
4
5
6
1
7
8
9
10
2
3
4
5
6
1
CNP10
1 1
22
–
+
15
14
1312
11
10
9
8
7
6
5
1
2
3
4
5
6
CNP11
+12V
D-GND
+7V
L-CH
A_GND
R-CH
P22 1-B
FROM MAIN PWB
CNS11
C71
10/50
VOLTAGE
REGULATOR
+B
+B
+B
+B
+B
PIN27
LOW
HIGH
TRY SPEED
SOLM2
SOLENOID
M
M3
TURNTABLE
UP/DOWN/
LOADING
MOTOR
SW1
OPEN CLOSE
SW2
MECHA
UP SW3
DISC
NUMBER
CNS5
CNS10
1
2 3
SWITCHING
DRIVER
+B
+B
P27 12-D
O
M DISPLAY PWB
CNS12
PCCL OP/CLOS UP/DOWN DISC NO. D_GND RES(DSP) DRF (ASP) SLD+ SLD– PUIN SW
Q()
SERVO/SIGNAL
CONTROL
CD_LCH
R65
1K
CD_D_NO
M–
M+
CD SERVO PWB-B
CD SIGNAL
SENSOR PWB-D
NC NC
NC
NC
SBSY
EFLG
NC
NC
MUTER
NC
NC NC
NC
NC NC
PCCL
+B
+B
BIM5

CD-C612
– 20 –
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 13.
Figure 20 SCHEMATIC DIAGRAM (3/10)
R304
47
C317
3.9P(UJ)
R320 10K
VD331
SVC348S
C330
8.2P
(UJ)
C335 560P
R323
68K
C334
22P
(UJ)
R305
82
C383
0.022
C331
0.047
C332
0.022
C302
10P (CH)
T331
T333
C304 4.7P(CH)
IC302
LC72131
PLL(TUNER)
R371 1K
Z
D
MT
Z
C311
0.022
C312
0.001
C307
0.0047
C308
0.0047
C310
0.001
R303 100K
R301
33K
L302
R379 2.2K
R374 1K R373 1K
R372 1K
D302
1SS133
D303
1SS133
R306
10
C306
18P(CH)
C305
15P(CH)
Q302
2SC535 C
R312
220
C316
100P
C393
1/50
R380
1.5K
R381
10K
R316
4.7K
C369
47/16
VD302
VARIABLE CAP
C338
100P
C303
0.01
C319 0.022
C314
10/16
CF301
R311
220K
R302
22
C318
22P(CH)
VD303
VARIABLE CAP
D301 1SS133
C309 4.7P
NC
NC NC
NC
0V
4.4V
0.7V
(UJ)
X OUT
X IN VSS
A OUT
A IN
PD
VDD
FM IN
IO2
IF IN
IO1 BO4 BO1 DO CL DI CE
AM AN
T
AM LOOP ANT
FM ANT
3
2
1
3
2
1CNP301
1 2 3
BF301
9
8
7
6
5
4321
910 11
121314
1516
171819202122
8
7
6
5
4321
R317
820
TP301
R314
10K
AM
GND
FM
FM RF
FM OSC.
L303
C313
0.022
T301
FM IF 3
1
2
FM BAND
COVERAGE fL
AM BAND
COVERAGE fL
AM OS
C
+B
MAIN PWB-A1(1/3)
AM SIGNAL
FM SIGNAL
C381
12P
(CH)
C392
0.001
X352
4.5MHZ
C382
15P
(CH)
FM FRONT END
IC301 TA7358AP
FM IF
AM IN