Sharp CD-C422 User manual

– 1 –
CD-C422/C422C/C2800/C2800C
No. S3820CDC422//
Illustration: CD-C422/C422C
Illustration: CD-C2800/C2800C
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................................................................................................................................................................ 11
NOTES ON SCHEMATIC DIAGRAM ............................................................................................................................. 13
WAVEFORMS OF CD CIRCUIT..................................................................................................................................... 14
BLOCK DIAGRAM .......................................................................................................................................................... 15
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD.............................................................................................18
TROUBLESHOOTING (CD CHANGER CONTROL / CD SECTION)............................................................................. 32
FUNCTION TABLE OF IC .............................................................................................................................................. 36
FL DISPLAY.................................................................................................................................................................... 42
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (For U.S.A. Only)
CD-C422/C422C
CP-C422, REAR SPEAKER SYSTEM,
Constitute CD-C422/C422C.
CD-C2800/C2800C
CP-C2800, REAR SPEAKER SYSTEM,
Constitute CD-C2800/C2800C.
• 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-C422/C422C/C2800/C2800C
– 2 –
Front speaker section
Type: 2-way type [5-1/4" (130 mm) woofer and
super tweeter]
Maximum input power: 30 W
Impedance: 5.4 ohms
Dimensions: Width; 7-1/8" (180 mm)
Height; 11-13/16" (300 mm)
Depth; 8-1/16" (204 mm)
Weight: 4.6 lbs. (2.1 kg)/each
Type: 3-way type [4" (100 mm) woofer, 2" (50mm)
tweeter and super tweeter]
Maximum input power: 30 W
Impedance: 5.4 ohms
Dimensions: Width; 7-1/8" (180 mm)
Height; 11-13/16" (300 mm)
Depth; 8-1/16" (204 mm)
Weight: 4.6 lbs. (2.1 kg)/each
Rear speaker section
Type: 4" (100 mm) full range speaker
Maximum input power: 10 W
Impedance: 16 ohms
Dimensions: Width; 6-11/16" (170 mm)
Height; 4-3/4" (120 mm)
Depth; 6-7/8" (175 mm)
Weight: 1.3 lbs. (0.6 kg)/each
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, terminal board, adjustment and compartment
covers 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 of0.3voltRMS(thiscorrespondsto 0.2milliamp.
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 µ F
1.5k ohms
10W
VTVM
AC SCALE
CP-C422
General
Power source: AC 120 V, 60 Hz
Power consumption: 50 W
Dimensions: Width; 10-5/8" (270 mm)
Height; 11-13/16" (303 mm)
Depth; 13-7/16" (341 mm)
Weight: 11.2 lbs. (5.1 kg)
Amplifier section
Output power: 20 watts minimum RMS per channel into
(CD-C422/C2800) 4 ohms from 100 Hz to 20 kHz, 10 %
total harmonic distortion
Output power: MPO; 60 W (30 W + 30 W)
(CD-C422C/C2800C) (10 % T.H.D.)
RMS; 40 W (20 W + 20 W)
(10 % T.H.D.)
Output terminals: Front speakers; 5.4 ohms
Rear Speakers; 16 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
Input terminal: Video/Auxiliaary (audio signal);
245 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)
Compact disc player section
Type: 3-disc multi-play compact disc player
Signal readout: Non-contact, 3-beam semiconductor
laser pickup
D/A Converter: 1-bit D/A converter
Frequency response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)
Specifications for this model are subject to change without prior notice.
SPECIFICATIONS
CD-C422/C422C/
C2800/C2800C
CP-C2800
REAR SPEAKER SYSTEM

– 3 –
CD-C422/C422C/C2800/C2800C
NAMES OF PARTS
Rear Panel
1. Speaker Terminals
2. AC Power Input Socket
3. FM/AM Loop Aerial Socket
4. Video/Auxiliary (Audio Signal) Input Sockets
Front Panel
1. Disc Tray
2. Disc Skip Button
3. Open/Close Button:
4. Disc Number Indicator
5. Timer Indicator
6. Record Indicator
7. Sleep Indicator
8. Extra Bass Indicator: X-BASS
9. Function/CD Track/CD Counter/Frequency/Preset
Channel/Volume/Timer/Sleep Time Indicator
10. Memory Indicator
11. FM Stereo Mode Indicator: ST
12. FM Stereo Indicator:
13. CD Repeat Indicator:
14. CD Play Indicator:
15. CD Pause Indicator:
16. Power Button
17. Memory/Set Button
18. Record Pause Button:
19. Extra Bass/Equalizer Mode Button: X-BASS
20. Volume Up/Down Buttons:
21. Function Selector Buttons
22. Clock Button
23. Timer/Sleep Button
24. (CD)Track Down/Review Button:
(TUNER)Preset Down Button:
25. Stop Button:
26. Play/Repeat Button:
27. (CD)Track Up/Review Button:
(TUNER)Preset Up Button:
28. Random/Demo Button
29. Tuning and Time Up/Down Buttons:
30. Headphone Socket
31. (TAPE 1) Cassette Compartment
32. (TAPE 2) Cassette Compartment
CD-C422/C422C/
C2800/C2800C
12
3
MEMORY ST
kHz
MHz
1 2 3
REC SLEEP X-BASS
45678
910 1112
13
14 15
16 17 18 19 20
21
22
23 24 25 26 27 28
29
30
31 32
1
2
3
4

CD-C422/C422C/C2800/C2800C
– 4 –
Speaker Section
Front Speaker
1. Super Tweeter
2. Woofer
3. Bass Reflex Duct
4. Speaker Wire
5. Tweeter
6. Super Tweeter
7. Woofer
8. Bass Reflex Ducts
9. Speaker Wire
Rear Speaker
10. Full Range Speaker
11. Speaker Wire
CP-C2800
CD-C422/C422C/
C2800/C2800C
Remote Control
1. Remote Control Transmitter LED
CD Control section
2. Disc Number Select Buttons
3. Track Down/Review Button:
4. Track Up/Cue Button:
5. Disc Skip Button
6. Play/Repeat Button:
7. Stop Button:
8. Memory Button
9. Clear Button
10. Random Button
11. Pause Button:
Tuner control section
12. Preset Up/Down Buttons:
Tape control section
13. (TAPE 1/2) Stop Button:
14. (TAPE 1) Play Button:
15. (TAPE 2) Record Pause Button:
16. (TAPE 2) Play Button:
17. (TAPE 2) Rewind Button:
18. (TAPE 2) Fast Forward Button:
19. Function Selector Buttons
20. Extra Bass/Equalizer Mode Button
21. Power Button
22. Volume Up/Down Buttons:
REAR SPEAKER SYSTEM
CP-C422
1
2
3
4
5
6
7
11
12
10
98
14
13
15
19
22
20
18
17
16
21
2
3
1
4
5
6
7
89
CP-C422
CP-C2800
10
11

– 5 –
CD-C422/C422C/C2800/C2800C
OPERATION MANUAL
SETTING THE CLOCK
(Main unit operation)
1
Press the POWER button to turn the power off.
2
Press the CLOCK button.
3
Within 3 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 16).
5
Press the MEMORY/SET button.
6
Press the TUNING/TIME ( or ) button to adjust the hour.
●Press the TUNING/TIME 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 lead 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 lead was disconnected.
POWER CLOCK 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:
When the POWER button is set to OFF.
① Press the MEMORY/SET button. ② Perform steps 6 - 9 above.
When the POWER button is set to ON.
① Press the CLOCK button. ② Within 3 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 3 seconds.
To change the time display mode:
① Perform steps 1 - 2 in the section "RESETTING THE MICRO-
COMPUTER", on page is a circuit diagram.
② Perform steps 1 - 9 above.
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 turn the power off.
2
While pressing down the VOLUME button and the /
button, hold down the POWER button for at least 1 sec-
ond.
1,2
2 2
Caution: ●The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD presets.

CD-C422/C422C/C2800/C2800C
– 6 –
MINI COMPONENT SYSTEM Quick-Guide
Guía rápida
Preparation for use Preparación para su uso
Turning the power on and off Conexión y desconexión de la alimentación
Remote control Control remoto
LEFTLEFT
RATED SPEAKER IMPEDANCE:
5.4 OHMS MIN . 16 OHMS MIN .
RIGHTRIGHT
FRONT
SPEAKERS REAR
SPEAKERS
FM Antenna
Antena de FM
AC 120 V, 60 Hz 120 V de CA, 60 Hz
Red
Rojo
Black
Negro
AM Loop Antenna Antena de cuadro
de AM
Wire with the white line
Cable con la línea blanca
Red
Rojo
Black
Negro
POWER
POWER
+
+
15
15
● 2 "AA" batteries
●
Dos pilas "AA"
● Batteries are not
included.
●
Las pilas no
están incluidas.
Remote Sensor
Sensor remoto
8" - 20' (0.2m - 6m) 0,2m - 6m
Sound control Control del sonido
● Volume ●
Volumen
● Extra-BASS/Equalizer ●
Graves extra/Ecualizador
VOLUME
/EQUALIZER
UP • • •
X-BASS
DOWN •
VOLUME
VOLUME
UP • • •
DOWN •
/EQUALIZER
X-BASS
X-BASS /
EQUALIZER
TUNER (BAND)
ST
FM STERO FM MONO AM
TUNING/TIME
TAPE
(1 2)
TAPE 1 TAPE 2
C D
TAPE 2
REC PAUSE
CD playback Reproducción de discos compactos
C D
OPEN
/CLOSE
OPEN
/CLOSE
● Label facing up ●
Etiqueta hacia arriba
Radio operation
Funcionamiento de la radio
Tape playback Reproducción de cintas
Recording from CDs Grabación de discos compactos
● Load the disc to be
recorded.
●
Introduzca el disco
que va a grabar.
● CD recording
starts.
●
La grabación de
CD empieza.
Precaution Precaución
●The sound level at a given volume setting de-
pends on a combination of speaker efficiency, location and many other factors. It is advisable to avoid exposure to high volume levels, which occur while turning the unit on with the volume control setting up high, or while continually lis- tening at high volume levels.
●Only discs bearing the logo as shown can be
played in this unit.
●
El nivel de sonido en una posición de volumen
fijado depende de una combinación del rendi-
miento de las altavoces, la posición y muchos
otros factores. Es aconsejable evitar un aumen-
to de volumen. Esto se produce, por ejemplo,
al conectar el aparato con el volumen puesto
en una posición alta. Evite continuar la audición
prolongada a altos niveles de sonido.
●
En este aparato sólo pueden reproducirse los
discos que tengan el logotipo mostrado.

– 7 –
CD-C422/C422C/C2800/C2800C
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.Takeoff nylonbandsorwire holderswherethey needto
beremovedwhendisassemblingtheunit.Afterservicing
theunit,be sure torearrangethe leadswherethey were
before disassembling.
4. Take suffcient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 7-2
Figure 7-3
CD-C422/C422C/
C2800/C2800C
1 Top Cabinet 1. Screw ..................... (A1) x4 7-1
2 Side Panel 1. Screw ..................... (B1) x2 7-1
(Left/right) 2. Screw ..................... (B2) x4
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) x4
4 Back Board 1. Screw ..................... (D1) x4 7-2
5 Switch PWB/ 1. Screw ..................... (E1) x6 8-1,2
Display PWB/ 2. Screw ..................... (E2) x1
Main PWB 3. Socket .................... (E3) x4
6 Front Panel 1. Screw ..................... (F1) x2 8-2
7 Tape Mechanism 1. Open the cassette holder. 8-2
2. Screw...................... (G1) x6
8 Turntable 1. Screw ..................... (H1) x1 8-3
2. Cover ..................... (H2) x1
9 Disc Tray 1. Screw ..................... (J1) x2 8-3
2. Guide ..................... (J2) x2
10 CD Changer 1. Screw ..................... (K1) x4 8-4
Mechanism
11 CD Mechanism 1. Screw ..................... (L1) x1 8-4
STEP REMOVAL PROCEDURE FIGURE
Note 1:
How to open the changer manually. (Fig. 7-3)
1. Insert the tip of fine screwdriver into the hole of CD player
base, and press down the worm wheel < A > .
2. Then, 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.
CD-C422/C422C/
C2800/C2800C
Figure 7-1
( B1 ) x1
ø3 x12mm
( B2 ) x2
ø3 x12mm
( B2 ) x2
ø3 x12mm
( B1 ) x1
ø3 x12mm
Top Cabinet
Side Panel
(Right)
Back Board

Side Panel
(Left)
( A1 ) x2
ø3 x12mm
( A1 ) x2
ø3 x12mm
CD Tray Cover
CD Player Unit
( D1 ) x4
ø3 x8mm
Hook
( C1) x3
( C2 ) x1
( C3 ) x4
Back Board

Main PWB
Front Panel
1
1
2
A
Pull
(C2) x1
LOCK 
LEVER
< A >

CD-C422/C422C/C2800/C2800C
– 8 –
( E3 ) x1

( F1 ) x2
ø3x10mm

( G1 ) x6
ø3x10mm

Tape
Mechanism
Cassette
Holder
Front Panel
Power Supply 
PWB
Open
( J1 ) x1
ø2 x 4mm
( J1 ) x1
ø2 x 4mm
( H1 ) x1
ø3 x10mm
Turntable
Disc Tray
( H2 ) x1
( J2 ) x1
( J2 ) x1
CD Player Unit
Washer
Figure 8-1
Figure 8-2
Be careful when installing the CD changer mechanism.
InstalltheCDchangermechanismontheCDplayerbaseafter
the shift lever has been set in the highest position.
Figure 8-3
Figure 8-4
( E3 ) x2

( E3 ) x1

( E1 ) x1
ø3 x 8mm
( E2 ) x1
ø3 x10mm
( E1 ) x3
ø3 x10mm
( E1 ) x2
ø3 x10mm
Main PWB
Display
PWB
Switch PWB
Front Panel
( K1 ) x4
ø2.6 x 5mm
(L1 ) x1
ø2.6 x10mm
CD Changer
Mechanism
CD Mechanism
Shift Lever
CD Player Base

– 9 –
CD-C422/C422C/C2800/C2800C
1 Front Speaker 1. Net.......................... (A1) x1 9-2
2. Duct Panel ............. (A2) x1
3. Screw ..................... (A3) x4
4. Screw ..................... (A4) x4
( A3 ) x4
ø3 x34mm
Screwdriver
Woofer
( A2 ) x1

( A1 ) x1
CP-C422
1 Front Speaker 1. Net.......................... (A1) x1 9-1
2. Duct Panel ............. (A2) x1
3. Screw ..................... (A3) x4
STEP REMOVAL PROCEDURE FIGURE CP-C422
Figure 9-1
Figure 9-2
CP-C2800CP-C2800
STEP REMOVAL PROCEDURE FIGURE
Screwdriver
Woofer
Tweeter
( A1 ) x1 ( A3 ) x4
ø4x14mm
( A4 ) x4
ø4x14mm
( A2 ) x1

CD-C422/C422C/C2800/C2800C
– 10 –
How to remove the pickup (See Fig. 10-2)
1.Removethescrews (B1) x2pcs., to removetheshaft(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, 13 and 14 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

– 11 –
CD-C422/C422C/C2800/C2800C
CF351
T301
IC302
T382
T302
CF301
IC301 L301
L312
CNP301
3
2
1
TP302
TP303
TP301
T333
VR381
T331
IC303
1
1
1
FM BAND
COVERAGE fL FM RF
FM
AM LOOP ANTENNA
FM IF
AM TRACKING
fL
VCO AM IF
FM DET
AM BAND
COVERAGE fL
13 17 21
20
MAIN PWB
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
• 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 T381 *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 T301(fL): *1
Coverage 1.3 V ± 50 mV
RF 98.00 MHz 98.00 MHz L312 *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 T382 Input: Pin 1 of
IC303
Output: TP302
IF 10.7 MHz 98.00 MHz T302(Turn Input: Pin 1 of
the core of IC301
transformer Output: TP302
T381 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.
Pin 13 of IC303 Pin 21 of IC303
D
G
S
10 kΩ
TO FREQUENCY
COUNTER
FET : 2SK19 or 2SK54
Figure 11-2
TAPE MECHANISM
MM 1
Motor
Volume in motor
98.00 MHz 98.00 MHz VR381* Pin 13, Pin 21
(60 dB) and ground
of IC303
Figure 11-1 ADJUSTMENT POINTS

CD-C422/C422C/C2800/C2800C
– 12 –
TEST MODE
2
1
TO
TE
200 ms
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
TRACKING/
ERROR
BARANCE
ADJUST
Figure 12-2 Figure 12-3
2
1
10ms
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
Enlarged
View
TRACKING
OFF-SET
ADJUST
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
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
Figure 12-4
IL is not performed.
<STOP>
123

– 13 –
CD-C422/C422C/C2800/C2800C
•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 CD ON—OFF
SW717 TUNER/BAND ON—OFF
SW718 TAPE ON—OFF
SW719 VIDEO/AUX ON—OFF
SW723 DISC SKIP ON—OFF
SW724 OPEN/CLOSE 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 RANDOM/DEMO ON—OFF
SW702 VOLUME DOWN ON—OFF
SW703 X-BASS/EQUALIZER ON—OFF
SW704 VOLUME UP ON—OFF
SW705 REC/PAUSE ON—OFF
SW706 FF ON—OFF
SW707 STOP ON—OFF
SW708 PLAY ON—OFF
SW709 REW ON—OFF
SW710 TUNING UP ON—OFF
SW711 TUNING DOWN ON—OFF
SW712 POWER ON—OFF
SW713 CLOCK ON—OFF
SW714 TIMER/SLEEP ON—OFF
SW715 MEMORY ON—OFF
KTA1266 GR
KTA1271 Y
KRC102 M
KTC3194 Y
KRA102 M
KRA109 M
KTC3200 GR
KTC3199 GR
2SD2012 Y
Figure 13 TYPES OF TRANSISTOR
B
(3)
C
(2)
E
(1)
FRONT
VIEW
ECB
FRONT
VIEW
ECB
FRONT
VIEW
KTA1273 Y
KRC104 M
KTC3203 Y
KRC107 M

CD-C422/C422C/C2800/C2800C
– 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
IC 41 42 HF
0.5ms
5.0 V
IC 37 HFL
0.5ms
5.0 V
IC 36 TES
1
2
3
CUE
0.5ms
1.00 V
IC 41 42 HF
1
2
3
0.5ms
5.0 V
IC 37 HFL
0.5ms
5.0 V
IC 41 42 TES
REVIEW
50ms
10.0 V
IC1 33 JP+
CUE
50ms
10.0 V
IC1 32 JP-
50ms
0.50 V
IC1 14 JP
50ms
1.00 V
IC1 7 TE
0.5ms
10.0 V
IC1 33 JP+
0.5ms
10.0 V
IC1 32 JP-
0.5ms
0.50 V
IC1 14 JP
0.5ms
1.00 V
IC1 7 TE
REVIEW
50ms
10.0 V
IC1 33 JP+
50ms
10.0 V
IC1 32 JP-
50ms
0.50 V
IC1 14 JP
50ms
1.00 V
IC1 7 TE
0.5ms
10.0 V
IC1 33 JP+
0.5ms
10.0 V
IC1 32 JP-
0.5ms
0.50 V
IC1 14 JP
0.5ms
1.00 V
IC1 7 TE
PLAY
TCD-712 (140mm)
TN0=01
50ms
1.00 V
IC1 27 SPO
50ms
2.00 V
IC1 13 CLV+
PLAY
TCD-712
5s
100mV
IC1 29 SLD
1
0.5s
100mV
IC1 29 SLD
1
PLAY
20ms
1.00 V
IC1 27 SPO
NORMAL DISC
TN0=01
20ms
2.00 V
IC1 13 CLV+

– 15 –
CD-C422/C422C/C2800/C2800C
Figure 15 BLOCK DIAGRAM (1/3)
1
2
3
4
5
98
6
7
20
12
13
24 25 30
31
3222
34
35 36
10 11
27
26
28 29
PU-IN SW
XL1
XIN
LD0
FIN2 JP–
CV+
SLC
SL1
FIN1 E F
TO
FD
SPO
SP
SLD
SL–
SL+
DRF
CL
DAT
CE
VCC1
6
+5V
PICKUP IN
SW4
FOCUS COIL
TRACKING COIL
M1
SPIN
MOTOR
M
M
M2
SLIDE
MOTOR
PICKUP UNIT
9
IC2
LC78623D
SERVO/SIGNAL
CONTROL
+B1
IC5
M56748FP
DRIVER
IC1
LA9241M
SERVO AMP.
6
1
95
+B1
+12V(+B5)
( TO IC401 )
RES. CQCK. COIN SQOUT. RWC. WRQ
~
~
~
CL, DAT, SELIAL CONTROL/CE Q93
Q91
SL+. SL–. DRF
7
3
9
8
7
6
5
4
3
2
1
GND (D) MECHA UP GND (D) DISK NO. OPEN/CLOSE GND (D) M– M+ GND (M) SOL
9
8
7
6
5
4
3
2
1
CNP10
M
+5V
62 64 45 3623 43
37
38 39
40 24 25
10 10
265853
10 12 20
32 40 43 44
5352515431302923271615
4144
Q1
TO MAIN SECTION
IC91
TA7291
MOTOR
CONTROL
XOUT
EFMO EFMIN CLV+ JP–
CONT2 CONT1
RCHO
RVSS
LVSS
LCHO
VVDD
VDD
LVDD
RVDD
XVDD
SW1 OPEN/CLOSE
SW2 MECHA UP SW3 DISC No.
M3 LOADING
SOLM1
TO DISPLAY SECTION
CNS10

CD-C422/C422C/C2800/C2800C
– 16 –
Figure 16 BLOCK DIAGRAM (2/3)
SO401
AUX IN
L-CH
R-CH
PB HEAD 1
2
3
4
L NF
L (T1)
R (T1)
L (T2)
R (T2)
R NF
4
5
13
21
24
23
18
17
10
1915
12
14
16
20
H/N
67
8
9
T1/T2
POP REDUCE
L REC
R REC R NF
REC
L NF
P.B.
REC
L-CH
R-CH
REC/PB
HEAD
ERASE
HEAD
BIAS
OCS
REF ALC
HIGH
NOR/ T1/T2
1GND
345
1
X352
4.5MHz
OSC
7
STEREO
FM/AM
SWITCHING
ST
ST
1
3457 8
6
FM IF
OSC BUFF
AM IF
FM IF IN
VT
FM RF FM OSC
FM
OSC
FM IN
AMIN
FM
5
3
AM MIX AM IF 6
9
FM/AM
VCC
21 20 13 15
10
111617
MON
O
DET OUT MPX IN
24 2223
AM OSC IN
AM+B
AM RF IN
FM DET VCO
FM DET
MO/ST
F
M
+B4
9
AM TRACKING
AM BAND
COVERAGE
+B4
L
R
PLAYBACK&RECORD/
PLAYBACK AMP.
IC501
AN7345K
L
RP.B
IC301
FM FRONT END
TA7358AP
FM BPF
FM/AM IF MPX.IF
IC303
LA1805
TAPE
VIDEO
TUNER
CD
FROM CD SECTION
Q571
L501 Q566 Q565 BIAS
Q511

Q514
~
P.BREC
AC BIAS
Q515
Q516 Q583
Q581 Q582
T1/T2
MUTING
Q575
Q576 REC
+B4
L
R
Q351
7
6
CE
DI
CL
DO
22
10
20 15 16
21
17
11
Q381
T382 T381
VR381
CF301
T302
T301
Q301
T331
VD331 VD332
T333
L312
IC302
LC72131
PLL CONTROLLER
FM
MPX VCO ADJ
TAPE 1
TAPE 2
R
L
FM OSC
L301
SWITCHING
SWITCHING
SWITCHING
SWITCHING
SWITCHING
FM&AM LOOP ANT
VOLTAGE
REGURATER
+B4
SWITCHING BIAS
FM +B

– 17 –
CD-C422/C422C/C2800/C2800C
Figure 17 BLOCK DIAGRAM (3/3)
M
13
4
3
11
MUTE
L
R
R
L-OUT
R-OUT
F
M/AM
I
TCHING
S
TFM
9
10
MONO/ST
FM
92
5
12
R-IN
L-IN
7VCC
14
NF
8
+12V (DRIVER)
+12V (AUDIO)
+B5
+B4
OUT
L
R
IC961
LA4550
POWER AMP.
+B4
PRESET GRAPHIC EQUALIZER
VDD
X-BASS
VSS VREF LVREF RVREF AVSS
GRAPHIC EQUALIZER
VOLUME
58
55
R
R
L
L
L
TAPE
VIDEO
TUNER
CD
Q
381
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
+B1
+B1
+
–
JA961
HEADPHONES
SERVO
+5V
+5V
TO CD SECTION
IC941
IC942
IC401
LC75394E
AUDIO PROCESSOR
23
16
33
17
32
19
30
21
28
14 35 56 63 50 26 27 12 37 11 38 10 39
24 25 57
CL
DI
CE
L
TAGE
U
RATER
+B4
25
27
29
30
33
34
35
36
37
38
39
40
42 41434445464748495051 4352535455565859
60
65
70
57
2423222120191817
77
79
80
72
71
16151413121110
9
~
6
1
~
~
~
78
3RX701
2
1
SYSTEM STOP
DO
DRF
DI
CE
CL
RESET
XL702
4.19MHz
AVDD
AVREF VDD
+B2
KEY
SW701

SW719
SW723
SW724
TO POWER SECTION
+B5
PHM1
RESET
Q704
Q705
ZD701
MEMORY
BACK UP
+B2
3
2
1~
3330 31 32
Q701
+B2
+B1
UNSWITCH
FL701
DISPLAY
~
61
64
~
POWER
T.F
AC 120V 60Hz
PT901
AC POWER
SUPPLY CORD
VOLTAGE
REGULATOR
Q901
Q941
D909

D911
~
D905 ~ D908
D901 ~ D904
ZD901
Q702
IC701
IX0191AW
SYSTEM CONTROL
MICROCOMPUTER
TO CD SECTION
TO CD SECTION
TO CD SECTION
TO CD SECTION
9
43
6
40
8
44
5
41
7
45
4
42
+
–
+
–
+
–
SO961
FRONT SPEAKER
TERMINAL
CD PUIN
CD SL+
CD SL–
VDD
TAPE SOL
TAPE MOTOR
TAPE MECHA STOP
TAPE F.P.
T1 RUN PLSE
SOLM1
SOLENOID
SWM5
CAM
SWM4
F. A. S
SWM3
FOOL PROOF
TAPE
MOTOR
L-CH INPUT
R-CH INPUT
T2 RRUN PLSE CD UP DOWN/DISC NO
CD DSP RES
CD T/T OPEN/CLOSE
RESET CD DSP SQOUT CD DSP COIN CD DSP RWC
CD DSP CQCK
CD DSP WRQ T1/T2 TAPE REC TAPE BIAS
Q706
Q703

CD-C422/C422C/C2800/C2800C
– 18 –
A
B
C
D
E
F
G
H
123456
Figure 18 WIRING SIDE OF P.W.BOARD (1/4)
• The numbers 1 to 12 are waveform numbers shown in page 14.
AM LOOP
ANTENNA
FM
ANTENNA
123
JK961
HEADPHONES
HEADPHONE PWB-A4
1
5
CNS902
R981
R982
1
R536
C555
C561
R501
LUG961
R568
Q512 Q566
R584
Q565
Q576
R578
R538
C534
C532
C540
C556
C562
R563
C564
C558
C942
C946
IC942
IC941
321 3
B
B
C
EB
C
E
B
C
E
B
C
E
B
C
E
E
C
B
3
2
1
C
E
21
C944
C947
C943
C945
Q941
C973
C969
C970
LUG962
R971
C974
C968
C966
C979
C964 C967
C963
R973
R972
C980
C976 C965
SO961
SPEAKER TERMINAL
FRONT
SPEAKERS
5.4OHMS MIN.
RIGHT
LEFT
RIGHT
RIGHT
LEFT
LEFT
REAR
SPEAKERS
16 OHMS MIN.
VIDEO/AUX
R975
CNS902
1
5C975
C941
C948
C949
C531
C539
C565
C563
CNP501
Q516
Q515
R535
R519
C5
8
C533
Q575
R575
C583
R537
C544
R577
C557
C403
D81
C404
R403
R404
C454
C424
C426
C428
C430
C432
C991
C992
R431
D401
C452
C446
C448
C449
C450
C451
C445
C447
R421
IC961
Q513
Q514
CNP502
1
24
510
2015
12
13
123
234567
Q511
IC501
CNP901
1234567
X352
R41
IC2
IC1
C351
E
C
B
1
2
3
B
C
E
3
2
1
1
2
3
3
2
1
R390
C307
Q351
L317
D381
CF351
T301
Q301
C354
C357
ZD351
IC302
R357
R358
T382
R314
T302
VD302
C396
C393
C395
C394
CF301
R396
R395
R393
R387
IC301
VD331
VD332
R14
C43
C67
C408
R408
C416
C422
R402
R401
C421
C429 C431
SO401
C401
C402
C427
C425
C423
C415
C455
C50
R406
R407
R356
R354 R355
R427
R426
R425
R405
C406
C407
C45
C41
C42
C59
C34
C35
C37
R18
C52
L1
Q93
R96
Q91
R28
C11
C19
C17
C18
C44
C13
C8
C9 C6
C7
C2
C405
C3
C5
Q1
C24
C39
C40
L301
L312
D301
VD301
CNP301
R312
VD303
3
2
1
C333
C391
T381
C330
T333
C385
C381
C386
C387
VR381
C392
Q381
C388
R394
R386
TP302
TP303
R39 R40
R29
XL1
T331
SHASSIS
GND
IC303
CNP1
CNP3
CNP2
CNP1
0
1
123456789
1011121314
23456789
54321
123456
1
2
0
253035
36
23456
56
7
7
8
89
10
CNS901
TO
POWER PWB
P20 1-B
CNS1CNS2
TO
CD MECHANISUM
P21 8-C-G
CNS3CNS1
1510
12
15
20
22
15
10
13
1524
ECB
ECB
E
C
B
BC
321
MAIN PWB-A1
51015
TP301
R340
R342
R415
R417
C417
R413
C412
R414
R412
C441
C443
R416
R418
C418
R73
C69
R75 C70
R76
R74
R86
R88
R87
C53
R34
C32
R35
C31
R38
R60
C22
C57
151015 20 25 30
35
45
55
60
64
48
49
40
32
33
16 17
1510
15 20 25 30
35
45
55
60
64
48
49
40
32
33
16 17
R57 R56
R58
R45 R79
R46
R47 R72
R77
R71
R70
C55 C56
C54
R78
C92
C51 R82
R16
R32
R33
C30 R37
R36
C33
R41
R9
5
C95
R27
R61
C20
R30
R25
R23
R22
R21
C16
R19
C15
R20
C94
R31
C25
R17
C12
C14
R12 R15
R13
R11
R8
C10
R7
R9
R6
C4
R4
R5 R3
R2 C38
R1
C382
C309
R43
C1
R42
C456
R361
C350
C352 C353 C356
R389
R388
R353
R351
R352
C318
C311
C324 C312
R301
R323
R322
R315 C310
C306
C303 C305
C304
C308
C314
C302
C301
C319
R311
C315
R313
C313
R309
R341
R317
C316
C317
C334
C355
C390
C389
C332
C331
R343
C335
C336
C380
R380
C384
R381
C383 R382 R391
R384
R383 R385
IC401
IC5
R566
R540
R511
R513
R514
R512
R5
C514
C513
R520
C520
C504
R502
C519
C501
C502
R531
R533
C535 C543
C553
R553
R557 R561
C559 R562
R532
R534
C536
R542
C554 R554
R556
C560
R560
R558
R552
R969
C962
R962
R966
R961
C961 R965
R967
C453
R432
R420
C444
C442
R539
R551
R555
R559
R941
R411 C411
C503
R567
151015 20 25 30
35
45
55
60
64
48
49
40
32
33
16 17
19 8

– 19 –
CD-C422/C422C/C2800/C2800C
Figure 19 WIRING SIDE OF P.W.BOARD (2/4)
78 9 10 11 12
CNSM1
CNPM1
TO TAPE MECHANISM PWB
P20 5-D
R759
SW724
OPEN/CLOSE
SW723
DISC SKIP
13
CNS701
DISPLAY PWB-A2 SWITCH PWB-A3
SW703
X-BASS
EQUALIZER
SW706
FF/PRESET
SW709
REW/
PRESET
SW715
MEMORY
/SET
R779
MELF
SW717
TUNER
(BAND)
SW704
VOLUME UP
SW702
VOLUME DOWN
C711
D705 C709
D702
D701
ZD701
C719
C718
RX701
R785
SW710
TUNING UP
/TIME
D703
CNS704
Q705
R730
R715
R717
SW708
PLAY
SW705
REC PAUSE
DEMO
SW701
RANDOM
/DEMO
1
1
11
9
SW711
TUNING DOWN
/TIME
D704
L701
C710
Q701
Q702
Q704
BCE
BCE
123
1
2
3
321
C702
R729
R728
R731
R727
R733
R734
CNS703
SW707
STOP
XL701
CNS701
SW712
POWER
1
3
R762 R763
R760
R764
R796
R745
R744
SW714
TIMER/SLEEP
D706 D707
SW713
CLOCK
CNS702
Q703
C716
1
11
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CNS705
18
1D708
R813
Q706
SW716
CD
SW718
TAPE
(1 2)
R746
FL701
R501
L501 C572
R568
CNS704
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Q582
C581
1
9
Q512
C570
Q566
C571
R584
Q565
B
C
E
B
C
E
B
C
E
B
C
E
E
C
B
3
2
1
CNP501
Q516
Q515
Q583
R510
C582
Q584
R515
C583
1
11
Q513
Q514
Q571
CNP502 1
123
234567
1
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CNS703
C68
C67
C52
D7
C58 D5
L1
Q93
C91
R98
C21
R54
D2
R26
R96
Q91
1
2
3
4
5
6
7
8
9
D91
C11
C19
C17
C18
C44
1
11
R99
R10
CNS702
IC91
2
CNP10
118
19
20253035
36
23
123456789
10
CNS502
TO
TAPE MECHANISUM
TAPE2 HEAD
P20 5-H
CNS501
TO
TAPE MECHANISUM
TAPE1 HEAD
P20 4-H
CNS10
2
RD
WH
GY
WH
GY
WH
GY
WH
1
2
3
4
5
6
7
8
9
10
11
12
E
ECB
ECB
ECB
123
123
C
B
BCE
321
E
C
B
E
C
B
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
51015
R711 R712
R707
R814
C720
R782
R801
R787
R798R800
R781
R797
R780
R784
R786
R799
R806
R723
R710
C714
C701
R732
R724
R725 R726
R702
R716
R718
R719
R720 R721
R722
R804
R704
C713
R740
R741
R739
R742
R735
R736
R753
R752
R751
R750
1
5
10
15
20
24
30 35
40 41
45 50 55 60 64
65
70
75
80
25
C708
C707
C715
R773
R774
R775
R776
R777
R778
R743 R765
R795
C712
R769
R771
R770
R768
R767
R766
R788
R789
R791 R790
R747 R748
R749
R803
R783
R805
C717
R802
IC701
R761
R97
R86
R88
R87
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2
530
35
4
0
32
33
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C51 R82
R95
C95
R27
R61
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R30
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R25
R23
R22
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1
R31
IC5
R585
R541
R576
R565 R571
R570
R569
R566
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R514
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C511
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R582
R581
R516
R518
R517
C514
C513
R520
C501
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2
11
3
45
7
6
12
10

CD-C422/C422C/C2800/C2800C
– 20 –
A
B
C
D
E
F
G
H
123456
Figure 20 WIRING SIDE OF P.W.BOARD (3/4)
R
CNPM1
CNPM2
12
12
FWM1 FWM2
SWM3
SWM4
F. A. S
F. P.
123456789101112
3
4
2
1PHM1
1
CNS901
7
1
2
3
4
5
6
7
RD
WH
BK
WH
BK
WH
BK
D903
D901
CNS901
TF901
PT901
POWER TRANSFORMER
S0901
AC POWER
INPUT SOCKET
AC 120V/60Hz
R904
R902
ZD902
C903
R905
C908 F901
F901: CANADA ONLY(CD-C422C/CD-C2800C)
JUMPER: USA ONLY(CD-C422/CD-C2800)
D904 D902
C907
C909
D908 D906
C905
C906
D910
C904
D905
D907
C910
R901 D911
D909
C902
Q901
ZD901
B
C
E
C901
R903 R907 R906
A
CNSM1
TO DISPLAY PWB
CNP901
TO
MAIN PWB
P18 5-B
MM1
TAPE MOTOR(203-7)
WH
BK
SOLM1
SOLENOID
(203-8)
+
-
SWM5
CAM
BK
WH
TAPE MECHANISM
PWB-C
POWER PWB-B
WH
PK BK
TAPE 1
PLAYBACK HEAD(203-6)
TAPE 2
ERASE HEAD(203-5) RECORD/PLAYBACK
HEAD(203-6)
YL
WHBL
PK
WH BK
GY
GYGY
BL
CNS502
CNS501
YL
WH
BK PK
WH
BK
7654321231
WH
BK PK
CNP502
TO MAIN PWB
P19 8-C
TO MAIN PWB
P19 8-C
CNP501