AIWA CDC622, CD-C2900 Service Manual

Illustration: CD-C622

CD-C622/C2900

SERVICE MANUAL

No. S3908CDC622//

CD-C622

CD-C622 mini component system consisting of CD-C622 mini
component system, CP-C622 and rear (GBOXS0021AWM1) speaker
system.

CD-C2900

CD-C2900 mini component system consisting of CD-C2900 mini
component system and CP-C2900 speaker system.

• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.

Illustration: CD-C2900

CONTENTS

IMPORTANT SERVICE NOTES (For U.S.A. Only) ........................................................................................................... 2

SPECIFICATIONS ..............................................................................................................................................................3

NAMES OF PARTS ........................................................................................................................................................... 4

OPERATION MANUAL ...................................................................................................................................................... 6

QUICK GUIDE ................................................................................................................................................................... 7

DISASSEMBLY.................................................................................................................................................................. 9

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 12

ADJUSTMENT ................................................................................................................................................................. 13

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 15

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 16

BLOCK DIAGRAM ........................................................................................................................................................... 17

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................20

VOLTAGE ........................................................................................................................................................................ 41

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 42

FUNCTION TABLE OF IC................................................................................................................................................ 47

FL DISPLAY......................................................................................................................................................................54

REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (For U.S.A. Only)

Page

SHARP CORPORATION

– 1 –

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

CD-C622/C2900

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
pinched or that hardware is not lodged between the chassis
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

having a return path to the chassis (antenna, metal cabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.

VTVM

AC SCALE

1.5k ohms
10W

0.15 µ F

TO EXPOSED
METAL PARTS

All check must be repeated with the AC line cord plug connection
reversed.
Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.

TEST PROBE

CONNECT TO
KNOWN EARTH
GROUND

– 2 –

SPECIFICATIONS

CD-C622/C2900

General

Power source: AC 120 V, 60 Hz
Power consumption: Stand-by; 0.3 W
(CD-C622) Power on; 95 W
Power consumption: Stand-by; 0.3 W
(CD-C2900) Power on; 100 W
Dimensions: Width; 10-5/8" (270 mm)

Height; 11-13/16" (300 mm)
Depth; 13-13/16" (351 mm)

Weight: 13.7 lbs. (6.2 kg)

Amplifier section

Output power: 40 watts minimum RMS per
(CD-C622 Except for channel into 4 ohms from 60 Hz
Canada) to 20 kHz, 10 % total harmonic

distortion

Output power: Front speakers;
(CD-C622 For Canada) MPO; 108 W (54 W + 54 W)

(10 % T.H.D.)
RMS; 60 W (30 W + 30 W)
(10 % T.H.D.)
Rear speakers;
MPO; 36 W (18 W + 18 W)
(10 % T.H.D.)
RMS; 20 W (10 W + 10 W)
(10 % T.H.D.)

Output power: 50 watts minimum RMS per
(CD-C2900 Except for channel into 6 ohms from 60 Hz
Canada) to 20 kHz, 10 % total harmonic

distortion

Output power: MPO; 180 W (90 W + 90 W)
(CD-C2900 For Canada) (10 % T.H.D.)

RMS; 100 W (50 W + 50 W)
(10 % T.H.D.)

Output terminals: Front speakers; 6 ohms
(CD-C622) Rear Speakers; 16 ohms

Headphones; 16-50 ohms
(recommended; 32 ohms)

Output terminals: Speakers; 6 ohms
(CD-C2900) Headphones; 16-50 ohms

(recommended; 32 ohms)

Input terminal: 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)

CD-C622/C2900

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

CP-C622

Type: 2-way type [5-1/4" (13 cm)

woofer and super tweeter]

Maximum input power: 60 W
Rated input power: 30 W
Impedance: 6 ohms
Dimensions: Width; 8-11/16" (220 mm)

Height; 11-13/16" (300 mm)
Depth; 8-9/16" (217 mm)

Weight: 5.7 lbs. (2.6 kg)/each

CP-C2900

Type: 3-way type [5" (13 cm) woofer,

2" (5 cm) tweeter and super
tweeter]

Maximum input power: 100 W
Rated input power: 50 W
Impedance: 6 ohms
Dimensions: Width; 7-7/8" (200 mm)

Height; 11-13/16" (300 mm)
Depth; 10" (256 mm)

Weight: 6.4 lbs. (2.9 kg)/each

Rear speaker section (CD-C622 Only)

GBOXS0021AWM1

Type: 4" (10 cm) full range speaker
Maximum input power: 20 W
Rated input power: 10 W
Impedance: 16 ohms
Dimensions: Width; 6-3/4" (170 mm)

Height; 6-3/4" (170 mm)
Depth; 3-1/2" (88 mm)

Weight: 0.9 lbs. (0.4 kg)/each

Specifications for this model are subject to change without
prior notice.

– 3 –

CD-C622/C2900

CD-C622/C2900

Front Panel

1. Disc Number Selector Buttons

2. Disc Tray

3. Multi-function Indicator

4. Disc Skip Button

5. Open/Close Button

NAMES OF PARTS

3

14

2

5

6. Extra Bass Indicator

7. FM Stereo Mode Indicator

8. FM Stereo Indicator

9. (CD) Repeat Indicator

10. (CD) Play Indicator

11. (CD) Pause Indicator

12. Spectrum Analyzer/ Volume Level Indicator

13. (TAPE 2) Racord INdicator

14. (CD) Disc Number Indicators

15. (CD/TUNER) Memory Indicator

16. Timer Indicator

17. Sleep Indicator

18. (TAPE 2) Record Pause Button

19. (CD) Track Down/Review Button
(TUNER) Preset Down Button
(TAPE 2) Rewind Button

20. (CD) Track Up/Cue Button
(TUNER) Preset Up Button
(TAPE 2) Fast Forward Button

21. Timer/Sleep Button

22. Clock Button

23. Timer Set Indicator

24. Power Button

25. Equalizer Mode Selector Button

26. Dimmer Button

27. Extra Bass/Demo Mode Button

28. Headphones Socket

29. Function Selector Buttons

30. Memory/Set Button

31. (CD/TAPE) Stop Button

32. (TAPE) Play Button
(CD) Play/Repeat Button

33. Tuning and Time Up/Cue Buttons

34. Volume Up/Down Buttons

6
7

8

12 13

18 19

21
22

23
24

28 29 30

35

31

9

10
11

14

20

33

32 34

36

15

16
17

25
26

27

35. (TAPE 1) Cassette Compartment

36. (TAPE 2) Cassette Compartment

Rear Panel

1. CD Digital Output Socket

2. AC Power Input Socket

3. FM/AM Loop Aerial Socket

4. Video/Auxiliary (Audio Signal) Input Sockets

5. Front Speaker Terminals (CD-C622 Only)

6. Rear Speaker Terminals (CD-C622)

6. Speaker Terminals (CD-C2900)

– 4 –

2

1

3
4

5
6

(Illistration: CD-C622)

Front Speaker

CP-C622

1. Super Tweeter

2. Woofer

3. Bass Reflex Ducts

4. Speaker Wire

CD-C622/C2900

1

2

4

3

CP-C2900

1. Super Tweeter

2. Tweeter

3. Woofer

4. Bass Reflex Ducts

5. Speaker Wire

Rear Speaker (CD-C622 Only)

GBOXS0021AWM1

1. Full Range Speaker

2. Speaker Wire

CD-C622/C2900

Remote Control

1. Remote Control Transmitter LED
CD Control section

2. Disc Number Select Buttons

3. Memory Button

4. Pause Button

5. Clear Button

6. Track Down/Review Button

7. Track Up/Cue Button

8. Disc Skip Button

9. Play/Repeat Button

10. Stop Button

11. Random Button

1

2

3

4

5

1

2

1

2
3

4
5

6
7

8
9

10
11
12

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

– 5 –

16 17 18

13 14

15

19
20

21 23
22

CD-C622/C2900

CLOCK

POWER

MEMORY/

SET

TUNING/

TIME

( )

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 12:0 0" → The 12-hour display will appear.

(AM 12:00 - PM 11:59)

"AM 0:00 " → The 12-hou r display will appear.

(AM 0:00 - PM 11:59)

"0:00" → The 24-ho ur display w ill appear.

(0:00 - 23:59)

Note that this can only be set when the unit is first installed

or it has been reset.

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 ( o r ) 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.

If this happens, follow the procedure below to change the clock

time.

To change the clock time:

Press the CLOCK button.

Within 5 seconds, press the MEMORY/SET button.

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:

Perform steps 1 - 2 in the section "RESETTING THE MICRO-

COMPUTER", on page 19.

Perform steps 1 - 9 above.

(Main unit operation)

In this example, the clock is set for the

12-hour (AM 12:00) system.

AM 12:00 AM 0:00 0:00

2

3

4

7

6

5

8

9

1

2

1

2

3

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

Whilst 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

OPERATION MANUAL

– 6 –

CD-C622/C2900

MINI COMPONENT SYSTEM

Quick Guide/Guía rápida

CD-C622

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

AC power cord x 1

Cable de alimentación

de CA 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

Wire with the

white line

Cable con la

línea blanca

Red

Rojo

Red

Rojo

Black

Negro

Turning the power on and off

Conexión y desconexión de la alimentación

Remote control

Controlador remoto

POWER

POWER

15

15

Black

Negro

Wire with the

white line

Cable con la

línea blanca

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-C622/C2900

MINI COMPONENT SYSTEM

Quick Guide/Guía rápida

CD-C2900

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

AC power cord x 1

Cable de alimentación

de CA 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

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

Red

Rojo

Red

Rojo

Black

Negro

Black

Negro

Turning the power on and off

Conexión y desconexión de la alimentación

Remote control

Controlador remoto

POWER

POWER

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

– 8 –

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. Take off nylon bands or wire holders where they need be
removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.

4. Take suffcient care on static electricity of integrated
circuits and other circuits when servicing.

CD-C622/C2900

(Illustration: CD-C622)

CD-C622/C2900

Top Cabinet

(A1)x2
ø3x12mm

(B2)x1
(B1)x1

ø3x8mm

CD-C622/C2900

STEP REMOVAL PROCEDURE FIGURE

1 Top Cabinet 1. Screw ..................... (A1) x4 9-1

2 Side Panel 1. Screw ..................... (B1) x6 9-1

(Left/right) 2. Hook....................... (B2) x2

3 CD Player Unit/ 1. Turn on the power supply, 9-2

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) x3

4 Back Board 1. Screw ..................... (D1) x5 9-2

(with Digital
Output PWB)

5 Main PWB 1. Screw ..................... (E1) x3 10-1

2. Socket .................... (E2) x4

3. Flat Wire................. (E3) x1

4. Tip Wire.................. (E4) x1

5. Flat Cable .............. (E5) x1

6 Front Panel 1. Screw ..................... (F1) x1 10-1

7 Display PWB/ 1. Socket .................... (G1) x1 10-2

Switch PWB 2. Screw .....................

8 Tape Mechanism 1. Open the cassette holder. 10-2

2. Screw...................... (H1) x5

9

Headphones PWB

10 Turntable 1. Screw ..................... (K1) x1 10-3

11 Disc Tray 1. Screw ..................... (L1) x2 10-3

12 CD Servo PWB 1. Screw ..................... (M1) x1 10-4

(Note 2) 2. Socket .................... (M2) x4

13 CD Changer 1. Screw ..................... (N1) x4 10-5

Mechanism

14 CD Mechanism 1. Screw ..................... (P1) x1 10-5

1. Screw ..................... (J1) x1 10-2

2. Support Bracket ..... (J2) x1

2. Cover ..................... (K2) x1

2. Guide ..................... (L2) x2

(G2) x12

Note 1:

How to open the changer manually. (Fig. 9-3)

1. Change, 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. After removing the connector for the optical pickup fromthe

connector wrap the conductive aluminium foil around the
front end of connector so as to protect the optical pickup
from electrostatic damage.

Side Panel
(Right)

CD Player
Unit

Back Board

Back Board

(B1)x4
ø3x8mm

(C3) x3

LOCK
LEVER

(C2) x1

Pull

Figure 9-1

(D1)x5
ø3x8mm

Figure 9-2

Side Panel
(Left)

(B2)x1

(B1)x1
ø3x8mm

CD Tray Cover

1

Main PWB

(A1)x2
ø3x12mm

Hook
( C1) x3

1

2

( C2 ) x1

– 9 –

Figure 9-3

CD-C622/C2900

(E3)x1

(E5)x1

(E2)x2

(G1)x1

Switch PWB

(G2)x2
ø3x10mm

(G2)x10
ø3x10mm

(E2)x2

(E4)x1

Main PWB

Figure 10-1

(G1)x1

(E1)x1
ø3x10mm

Front Panel

(F1)x1
ø3x8mm

Front Panel

(E1)x2
ø3x8mm

Display PWB

Headphones
PWB

Open

( M1 ) x1
ø3 x10mm

CD Servo PWB

( M2 ) x2

( M2 ) x2

CD Player Unit

Figure 10-4

( N1 ) x4

ø3 x12mm
( P1 ) x1
ø2.6 x10mm

Shift Lever

CD Changer
Mechanism

( L1 ) x1
ø3 x10mm

( L2 ) x1

(J2)x1

(J1)x1
ø3x10mm

( K2 ) x1

(H1)x5
ø3x10mm

Figure 10-2

( K1 ) x1
ø3 x10mm

Cassette
Holder

Tape Mechanism

Washer

Turntable

Disc Tray

CD Player Base

CD Mechanism

Care when installing the CD changer mechanism.
Install the CD changer mechanism on the CD player base after
the shift lever has been set in the highest position.

Figure 10-5

CD Player Unit

Figure 10-3

( L1 ) x1
ø3 x10mm

( L2 ) x1

– 10 –

CD-C622/C2900

CP-C622

STEP REMOVAL

1 Front Speaker 1. Front Panel ............ (A1) x1 11-1

2. Tip .......................... (A2) x2

3. Screw ..................... (A3) x4

PROCEDURE

FIGURE

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.

CP-C2900

STEP

REMOVAL PROCEDURE FIGURE

1 Front Speaker 1. Front Panel ............ (A1) x1 11-2

2. Tip .......................... (A2) x2

3. Screw ..................... (A3) x2

4. Screw ..................... (A4) x2

5. Screw ..................... (A5) x4

Front Panel

(A1)x1

Front Panel

(A1)x1

CP-C622

CP-C2900

Super

Tweeter

Piezo

(A2)x2

(A3)x4
ø4x12mm

Woofer

Figure 11-1

Tweeter

(A3)x2
ø3x10mm

(A2)x2

Screw Driver

(A4)x2
ø3x10mm

(A5)x4
ø4x14mm

Figure 11-2

Woofer

Screw Driver

– 11 –

CD-C622/C2900

( B1 ) x2
ø2.6 x6mm

Shaft
( B2 ) x1

Stop Washer
( B3 ) x1

Gear
( B4 ) x1

CD Mechanism

Pickup

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. 12-1)

1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.

Loading / Up
/ Down Motor

Motor
PWB

( A1 ) x2
ø2.6 x5mm

Figure 12-1

How to remove the pickup (See Fig. 12-2)

1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).

2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).

3. Remove the pickup.

Note

After removing the connector for the optical pickup fromthe
connector wrap the conductive aluminium foil around the front
end of connector so as to protect the optical pickup from
electrostatic damage.

Figure 12-2

– 12 –

ADJUSTMENT

Pin 13 of IC303

Pin 21 of IC303

D

G

S

10 kΩ

TO FREQUENCY
COUNTER

FET : 2SK19 or 2SK54

MECHANISM SECTION

• Driving Force Check

Torque Meter

Play: TW-2412 Tape 1: Over 80 g

• Torque Check

Torque Meter

Tape 1

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

• Tape Speed

Test Tape

Normal MTT-111 Volume in 3,000 ± Speaker
speed motor. 30 Hz terminal

Adjusting

Point

(MM1) (Load

TUNER SECTION

fL: Low-range frequency
fH: High-renge frequency

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage 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

*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301

TAPE MECHANISM

Frequency

Display

Specified Value

Tape 2: Over 80 g

Specified Value

Specified

Value

Setting/

Adjusting

Parts

Tape 2

Instrument

Connection

resistance:
8 ohms)

Instrument

Connection

CD-C622/C2900

• FM RF

Signal generator: 1 kHz, 75 kHz dev., FM modulated

Test Stage

Band — 87.50 MHz L303(fL): *1
Coverage 3.4 V ± 50 mV

RF 98.00 MHz 98.00 MHz L302 *2

Frequency

(10-30 dB)

Frequency

Display

Serring/

Adjusting

Point

*1. Input: Antenna, Output: TP301
*2. Input: Antenna, Output: Speaker terminal

• Detection

Signal generator: 10.7 MHz, FM sweep generator

Test

Stage

Detection 10.7 MHz 98.00 MHz T352 Input: Pin 1 of

IF 10.7 MHz 98.00 MHz T301(Turn Input: Pin 1 of

Frequency

Frequency

Display

Adjusting

Parts

the core of IC301
transformer Output: TP302
T352 fully
counter­clookwise.)

• VCO Frequency

Frequency

98.00 MHz 98.00 MHz VR351* Pin 13, Pin 21
(60 dB) and ground

Frequency

Display

Adjusting

Parts

* Adjust for 76 kHz ± 200 Hz.

Notes:

After preparing the test circuit shown in Fig 13-2, 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.

Instrument

Connection

Instrument

Connection

IC303
Output: TP302

Instrument

Connection

of IC303

Volume in motor

MM 1
Motor

FM BAND
COVERAGE fL

MAIN PWB

L301

1

IC301

L302

FM RF

T331

T352

FM DET

TP302

13

AM IF

IC303

L303

VR351

T351

1

21

VCO

T301

FM IF

TP301

T333

R340

Figure 13-1 ADJUSTMENT POINTS

– 13 –

Figure 13-2

CNP301
AM LOOP
ANTENNA

AM TRACKING
fL

AM BAND
COVERAGE fL

CD-C622/C2900

1 2 3

TEST MODE

• 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. 14-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the (

<MEMORY>
LASER ON

<MEMORY>
Tracking on the spot.
SERVO OFF PLAY

) or ( ) key.

<MEMORY>

Tracking on the spot.
SERVO ON PLAY

IL is not performed.

<STOP>

STOP

<PLAY> key input

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

Press <STOP> key.

Stop

<Disc Number 3> key: Track 15

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

Figure 14-1

CD SECTION

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. 14-2)

2. Tracking offset (Fig. 14-3)

3. E/F balance (tracking error balance) (Fig. 14-4)

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.

0.1s

0.50 V
IC1 20 FE

FOCUS
OFF-SET
ADJUST

0.1s

0.50 V
IC1 7 TE

TRACKING
OFF-SET
ADJUST

1
2

Figure 14-2

200 ms
1V/diV
IC 1 15

200 ms
1V/diV
IC 1 7

TO

TE

TRACKING/
ERROR
BARANCE

1

ADJUST

2

Figure 14-4

– 14 –

10ms

0.50 V
IC1 20 FE

10ms

0.50 V
IC1 7 TE

Figure 14-3

Enlarged
View

TRACKING
OFF-SET
ADJUST

1
2

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
electrolytic capacitor, the expression “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.

CD-C622/C2900

• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas­sis 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.

REF. NO DESCRIPTION POSITION POSITION

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
SW705 DISC 1 ON—OFF
SW706 DISC 2 ON—OFF
SW707 DISC 3 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

FRONT

VIEW

REF. NO DESCRIPTION

SW714 TUNER/BAND ON—OFF
SW715 VIDEO ON—OFF
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

FRONT VIEW

E C B
(S) (G) (D)
(1) (2) (3)

KTA1266 GR
2SA1015 GR
2SA1318
2SC3331
2SC535 C
KRA102 M
KRA109 M
KRC102 M

KRC104 M
KRC107 M
KTA1271 Y
KTA1273 Y
KTA1274 Y

L1154GT4
SLI342YCB
SLI342DCB
SLI342UCB

SLI342YCJ
KTD2058 Y
KTC3200 GR
KTC3203 Y

Figure 15 TYPES OF TRANSISTOR AND LED

– 15 –

CD-C622/C2900

5ms

0.50 V

1

IC1 20 F.E

5ms

5.0 V

2

IC1 54 DRF

WAVEFORMS OF CD CIRCUIT

STOP PLAY

FOCUS SERCH

0.5ms

6

10.0 V
JP+

0.5ms

7

10.0 V
JP-

0.5ms

8

0.50 V

3
1

JP

0.5ms

9

1.00 V
TE

0.5ms

3

1.00 V
HF

0.5ms

4

5.0 V
HFL

0.5ms

5

5.0 V
TES

0.5ms

1.00 V

3

HF

0.5ms

4

5.0 V
HFL

0.5ms

5

5.0 V
TES

50ms

6

10.0 V
JP+

50ms

7

10.0 V
JP-

50ms

8

0.50 V
JP

50ms

9

1.00 V
TE

CUE

1
2

3

REVIEW

1
2

3

CUE

10

11

10

11

12

20ms

1.00 V
SPO

20ms

2.00 V
CLV+

50ms

1.00 V
SPO

50ms

2.00 V
CLV+

5s

100mV

SLD

PLAY

NORMAL DISC
TN0=01

PLAY

TCD-712 (140mm)
TN0=01

PLAY

TCD-712

0.5ms

10.0 V

6

JP+

0.5ms

10.0 V

7

JP-

0.5ms

0.50 V

8

JP

0.5ms

9

1.00 V
TE

50ms

10.0 V

6

JP+
50ms

10.0 V

7

JP­50ms

8

0.50 V
JP

50ms

9

1.00 V
TE

REVIEW

12

0.5s
100mV
SLD

1

1

– 16 –

27

1

2

3

4

1

8

6

7

18

24

40

20

4

5

15

23

16

26

27

7

2

2520

29

21 22

35

14

38

39

28

41

42

37

36

PU-IN SW

XL1

XIN

LD0

FIN2

JP–

CV+

SLC

SL1

FIN1EF

TO

FD

SPO

NC

SLD

SL–

SL+

DRF

CL

DAT

CE

VCC1

6

+5V

PICKUP IN

SW4

FOCUS COIL

TRACKING COIL

M1

SPINDLE

MOTOR

M

M

M2

SLED

MOTOR

PICKUP UNIT

9

IC2

LC78622NE

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

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)

9

8

7

6

5

4

3

2

1

CNP10

M

+5V

+B1

62

64 45 3623 43

37

31

383940

24

25

10

1

2

2

1

3

3

2

1

4

5

6

10

265853

101220

324043

44

5352515431302923271615

4144

Q1

Q52

+4.3V

Q81 +7.3V (B1)

REGULATOR

TO MAIN SECTION

(TO IC601)

XOUT

EFMO

EFMIN

CLV+

JP–

CONT2

CONT1

LCHO

LVSS

RVSS

RCHO

VVDD

VDD

LVDD

RVDD

XVDD

SW1

OPEN/CLOSE

SW2

MECHA UP

SW3

DISC No.

M3

LOADING

SOLM1

TO MAIN

SECTION

CNS10

+B5

~~

CNP11

BI1B

2

1

BI1A

CNP99

+5V

2

4

8

33

38

39

46

~

646251

11

22

CD-C622/C2900

Figure 17 BLOCK DIAGRAM (1/3)

– 17 –

CD-C622/C2900

FM

ANTENNA

AM LOOP
ANTENNA

L301

FM B.P.F

1

FM FRONT END

2 3 4

L302

AM TRACKING

T331 T333

IC301

TA7358AP

5

7

FM

OSC

FM RF

OSC BUFF

AM BAND
COVERAGE

L303

Q302

8

FM OSC

6

9

FM IF

T301

VT

FM +B

CF301

FM IF IN

FMOSC

Q344

SWITCHING

SWM3

FOOL PROOF

SWM4

F.A.S

SOLM1

FM DET

20

17

+B7

DODICL

6

17

SOLENOID

VR351

MPX VCO ADJ

13

VCO

MPX IN

16

Q350

FM/AM
SWITCHING

VOLTAGE

REGURATER

SWM5

CAM

MONO/ST

15

L

9

10

R

FM/AM

11

Q343

IC704

3

1

2

+B4

+B4

AM IF

T351

CF351

1 3

AM MIX

IC303

LA1805

FM/AM IF MPX.

24

23

22

AM+B

AM RF IN

AM OSC IN

X352

4.5MHz

FM IN

20

1

OSC

AM IN

22

16

15

IC302

+B4

T352

21

6

5

GND AM IF

7

STEREO

11

FM DET

FM+B MO/ST

DET OUT

CE

3 4

5

LC72131

PLL (TUNER)

FM

10

7

21

FROM CD SECTION
CNP11

TAPE 1

PB HEAD

TAPE 2

REC PB HEAD

L-CH

R-CH

L-CH
R-CH

ERASE
HEAD

REC

P.B

AC BIAS

CNS11

1
2
3

SWITCHING

Q103~Q106

IC101

PLAYBACK AND RECORD

L(T1)

R(T1)

L(T2)

R(T2)

R NF

POP REDUCE

L REC
R REC

SWITCHING SWITCHING

Q107
Q108

BIAS
OCS

Q128
L104

AN7345K

/PLAYBACK AMP.

1

24

2

23

L NF

3
4

T1/T2

6

REC

9

16
14

REF

12

NOR/
HIGH

15 19

Q109

SWITCHING

Q111

P.B.

H/N

T1/T2

13

4

21

5

20

7

18

8

17
10

Q110

L

R

L R REC

L NF
R NF
ALC

+B4

PB

JK601

VIDEO/AUX

L

R

SWITCHING

Q124
L103

AUX
TAPE
TUNER

CD

11

5

L

16

R

4

L

17

R

3

L
R

18

AUDIO PROCESSOR

L

2

R

19

1

BAIS

Q126

10

IC601

M62439SP

9

20

Q121
Q122

MUTING

–B4

R

13

8

L

REC

T1/T2

BAIS

Figure 18 BLOCK DIAGRAM (2/3)

– 18 –

CD-C622/C2900

T

SWM3

ROOF

SWM4

F.A.S

OLM1

NOID

SWM5

CAM

351

CO ADJ

MONO/ST

15

3

O

MO/ST

L

9

10

R

FM/AM

11

Q343

M

CHING

IC704

3

1

2

GE
TER

+B4

TAPE MOTOR

M

MM1

Q702
Q703

1

RX701

2

+B7

+B7

+B7

3

KEY
SW701
~SW730

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31

1 2 3

535251

VDD

AVDD

282930

PHM1

FL701

DISPLAY

~~~

15 2516

4

26

IC701

IX0280AW

SYSTEM CONTROL

MICROCOMPUTER

+B5

28

VDD

+B7

~

29

36

37 3839

XL701

4.19MHz

7170696867666564636261 80797877

737260595857565554

767574

101112131415161718192021222324252627

8

9

6

5

7

Q704

4 3 2 1

+B5

81
82
83
84
85
86
87
88
89
90
91
92
93
94
95

96
97
98
99

100

VDD

Q705
Q706
Q707

TO CD
SECTION

Q960

MEMORY
BACK UP

UNSWITCH
+B7

+B1

M

M901
FAN MOTOR

SSOR

121
122

TING

–B4

Q908

IC901

R

13

8

L

Q601

Q603

Q602

Q604

+7.3V

REC

ZD801

T1/T2

BAIS

+B1

+12V(ANALOG)

+B4

+12V(MOTOR)

+B5

+B2

+B6

+B7

+5.6V

UNSWITCH

Q821

+5V

14

10

VOLTAGE

REGULATOR

Q822

Q824

Q823

STK40704
POWER AMP.

+B

15

3

–B

2

1

VOLTAGE

REGULATOR

VOLTAGE

REGULATOR

VOLTAGE

REGULATOR

Q801

Q803

D801

D803~D806

D807
~D809

Q802

FRONT
6
7

L-OUT

R-OUT

F802

4A/125V

F803

4A/125V

F805

2A/250V

D810~D813

T801

POWER

TRONSFORMER

JK970
HEADPHONES

RL901

T.F

TRONSFORMER

T802

POWER

SO901
SPEAKER
TERMINAL

REAR
SPEAKER

FRONT
SPEAKER

RL801

AC POWER
SUPPLY CORD

622
ONLY

AC 120V, 60Hz

Figure 19 BLOCK DIAGRAM (3/3)

– 19 –

CD-C622/C2900

W

0

A

K

5

E

B

C

A
B
F

LD

K
E
B
LD GND

A
F
C

4
3
2
1

LT0H30M1

D

TR+
FO+

FO–
TR–

ACTUATOR

PICKUP UNIT

E

F

CD MOTOR PWB-C

M1

SPINDLE

M

MOTOR

M2

SLED

G

MOTOR

SW4

PICKUP

IN

M

CNS1B

+
–

+
–

MON

TR–
TR+
FO+
FO–
GND
PD
VR
LD

CNS1A

1
2
3
4
5

CNS2B

1
2
3
4
5

CNP1

1

2
3
4
5
6

7
8

CNP3A

6
5
4
3
2
1

K
A
B
E
F

5

K

4

E

3

A
B

2

F

1

TR–

1

TR+

2

FO+

3

FO–

4

GND

5
6

PD

7

VR

8

LD

CNS2A

1
2
3
4
5
6
7
8

CNS3B 1 CNS3A

6

6

5

5

4

4

3

3

2

2
1

1

2
3
4

5
6

7

8

6

5

4

3

2
1

PD

LD

CNP2

CNP3

C15

0.01

R2
1K

C2

0.1/50

TE

C54

0.001
R11

6.8K

R13

1K

R14
27K

C12

TR–
TR+
FO+
FO–

C36

100/16

C55

100/16

CD_GND

SP+
SP–
SL_+
SL_–
CD_PUIN

0.01

0.1

C4

R16

3.3K

R22

C1

47/16

2SA1318

9

R9

100K

R10

2.2K

R12
100

C9

0.047

820

Q1

R1

R15
12K

8

R20
R21

+B

1K

1.5K

C5

0.033

C76

0.022

C3

1/50

R8

15K

0.033

0.1/50
C8

0.068

C10

C6

C7

180P

R19

VREF

22

R17

33K

C11

1K

1
2
3

4

5

6

7

8
9

TH

1

0

11
12

TD–
TD

13

JP

14

TO

15

FD

16

0.1

10

R56

6.8K

FIN2

REF
FIN1
EREF

F
TB
TE–

TE

TESI
SCI

NC

R18

15K

1
2
3
4
5
6
7
8
9

11
12
13
14
15
16
17
18
19
20
21

1

64

63 62

LDS

–

VCC1

+

–

+

–

+

REF

REF

REF

–

+

GEN

REF

–

+

FD–

17

TO
FD
FO (GAIN)
FO+
FO–

TR+

TR–

SL–
SL+
SLD
VCC1
STANDBY
Vref
MUTE

C34

C33

0.33/50

0.47/50
C32

0.01

560

R46

61

60

59

BHI

PHI

LDO

RF

FE1

–

+

REF

VCR

–

+

VCR

–

+

+

–

REF

REF

JP

+

REF

–

TO

+

–

REF

GEN

REF

+

–

FA

FE

FA–

18

19

C13

10K

R23

R24

1.5K

47K

IC3

M63001FP

FOCUS/TRACKING/SPIN

(SPN)VCC2

LF2

REF

VCR

–

VCR

+

SERVO AMP.

+

–

+

–

TGL1

GL

THDL

THD

FSC

FOSTA

FE1

REF

GEN

+

–

REF

–

+

SP

FE–

AGND

23

21

22

20

330P

R26

C16

82K

C14

0.01
R27

R25

39K

LD_M+

42

LD_M–

41

VCC4

40

M+

39

M–

38

SOL–

37

SOL+

36
35
34
33

100/16

GNDGND

32
31

100/16

30

/SLED DRIVER

29

VCC3

28

SP+

27

SP–

26

SPO

25
24

SOLD

23

SOL–

22

C31

220/6.3

58

VR

+

–

+

–

–

+

+

–

IC1

LA9241M

VCC

+

–

+

–

REF

S.Q.R

REF

–

+

REF

SPI

24

25

R28

0.0047

R31

1.2K

0.47/50

+B

C82

C77

+B

+B

57

REF1

FSTA

C18

+

SPG

26

10K

DEF
HFL

DRF

–

C30

0.1/50

56

REF

REF

SP–

C17

0.001

R30

6.8K

JP

R29

VCC2

2

27

56K

55

FSS

TOSTA

SLOF

+

+

10

SPO

28

54

DRF

EFBAL
FOSTA

2FREQ
LASER
FSTA
8/12CM

–

–

SLOF

REF

SLEO

C20

R33

1.2K

53

CE

CV–
CV+
JP–
JP+

JPCLO

REF

47/16

R32

OR

10K

52

R34

3.3K

51

DAT

CE
CL

LATOH

SLOF

SLOF

SLD

C19

CL

REF

+

29

1/50

49

50

FSC

RF

4

5

–

+

–

30

CLK

REF

3

SL–

C21

DEF

DGND

RFS–

–

+

RFSM

CV+
CV–

SLOF

HFL
TES

TOFF
TGL

SL+

31

R36

220K

0.0033

R35

220K

TBC

SLC

JP+

JP–

32

R45

4.7K

48

NC

47

46
45

SLI

44

43

42

C24

41

HF

TP1

40

39
38
37
36
35
34
33

6

C27

2.2P

C29

0.001

R40

5.6K

4.7/50

56K

R43

C26

0.033

R41

47K

C25
27P

R38
470

C28

0.1

R39

1K

C23

0.0027

R44
33K

R42
47K

C22

220P

7

C57

0.001

R37

82K

GND

C35
1/50

D1

1SS133

+B

+B

+B

+B

10K

WRQ(DSP)

RWC(DSP)

CO IN(DSP)

R47

RES(DSP)

CQ CK(DSP)

SQ OUT(DSP)

DRF(ASP)

4 3 2 1

6 5

7

C37

0.022

D_GND

SLD+

8

9

SLD–

1

+B

CNP12

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 15.

1

23456

Figure 20 SCHEMATIC DIAGRAM (1/10)

– 20 –

CNS12

P29 12 - B

TO DISPLAY P

C22

220P

C57

0.001

CD-C622/C2900

R57 1K
R58 1K
R59 1K

R61 1K
R62 1K
R63 1K

+B

R51

3.3M

C39

0.047

R52
27K

11

+B

R50
680

C40

0.047

R53

1.2K

C56

0.022

10
11
12
13
14
15
16

1
2

3
4

5

6
7
8
9

C38

0.01

64

TEST1

DEF1
TA1

PDO

VVSS
ISET

VVDD
FR

VSS
EFMO

EFMIN
TEST2

CLV+
CLV_
V/P
HLF
TES

R60

63

62

/CS

TEST5

SLICE
LEVEL

CONTROL

CLV
DIGITAL
SERVO

SERVO

COMMAND

TOFF

TGL

17

18

1K

61

4M

JP+

19

59

60

NC

16M

VCO CLOCK

JP_

PCK

21

20

C46

100P

(CH)

56

54 53

57

58

55

NC

/RES

RWC

COIN

/CQCK

SQOUT

µ-COM

TEST11

INTERFACE

2KX8
RAM

ERROR COERECT

FLAG CONTROL

OSC CONTROL

SYNC-DETECT

EFM DEMODULATE

IC2

LC78622NE

SERVO/SIGNAL

CONTROL

FSEQ

NC

NC

CONT1

CONT2

VDD

25

22

23

24

R88 1.2K

R89 1.2K

+B

52

NC

WRQ

FSX

EXTERNAL

OUTPUT

CONT3

CONT4

26

27

R91 1K

R90 220

C44

C45

100P(CH)

51

50

NC

SFSY

SBCK

SUB-CODE

GENERATOR

NC

NC

EMPH

CONT5

28

29

100P(CH)

49

PW

X-TAL

4FS

DIGITAL

FILTER

DIGITAL

NC

C2F

31

30

R54
330

C47

100P(CH)

NC

OUT

TEST3

DOUT

32

C48

100P

EFLG
SBSY

XVSS

XOUT

XVDD

MUTER

RVDD
RCHO

RVSS

DAC

@

LVSS

1BIT

LCHO

LVDD

MUTEL

TEST4

NC

BI1B

2
1

NC
NC

XIN

NC

NC

C49

100P(CH)

48
47

46

45
44

43
42
41
40
39

38
37
36
35
34
33

+B

R72

2.7K
R71

2.7K

330/6.3

R65

1K

+B

+B

C41
12P

C42
15P

C83

0.022

C71

10/50

C43

0.022

10/50

0.82µH

C50

+B

CD SIGNAL

XL1

16.934 MHz

R93
220

D81

D82

1SS133

1SS133

C72

R74

100K
R73

100K

R55

+B

100

L61

C51

100/16

+B

+5V

+B

C74

220P

C73

220P

CD_RCH

A_GND

CD_LCH

Q52

KTC3203 Y

R64

22

C52

100/16

R66
220

ZD61

R-CH

A_GND

MTZJ5.6B

+B

BI1A

CNP11
1

P24 1 - B

2

L-CH
D-GND

+7V

+12V

3
4
5
6

CNS11

TO MAIN PWB

+B

C75

0.001

+B

2
1

CNP99
3
2
1

P25 10 - B

CNS99

TO DIGITAL

OUTPUT PWB

33

R47

CQ CK(DSP)

CO IN(DSP)

SQ OUT(DSP)

4 3

TO DISPLAY PWB

10K

RES(DSP)

DRF(ASP)

6 5

7

CNS12

P29 12 - B

C37

0.022

D_GND

SLD+

8

9

10

SLD–

PUIN SW

11

OP/CLOS

14

13 12

PCCL

DISC NO.
UP/DOWN

15

D92

1SS133

R82
390

D93

1SS133

R80
820

390

R83

2 3

1

Q51

KRC102 M

R81
820

R84

2.2K

D91

1SS133

M–

M+

CD_D_NO

CNP10

+B

1

SOL+
SOL–

2

M–

3

M+

4

GND(D)

5

DISC NO.

6

OPEN CLOSE

7

GND(D)

8
9

MECHA UP

10

GND(D)

+B

CD SERVO PWB-B

SOLM2

SOLENOID

BIM05

1

1

2

2
3
4
5
6
7
8
9

10

CNS10

3
4
5
6

SENSOR PWB-D

1 1
2 2

CNS5

–

M

+

SW2
MECHA UP

DISC NO

LOCK

M3
T/T
UP/DOWN
LOADING

SW1
OPEN
CLOSE

SW3
DISC NUMBER

• The numbers 1 to 12 are waveform numbers shown in page 16.

7

8 9 10 11 12

Figure 21 SCHEMATIC DIAGRAM (2/10)

– 21 –

CD-C622/C2900

IC302

D

Z

T

C

K

A

AM LOOP ANT

B

C

D

E

F

FM ANT

CNP301

1

1

2

2

3

3

82P

C301

82

R304

D302

1SS133

C315

6.8P(UJ)

L301

B.P.F

10P(CH)

R305

82

C309

D301 1SS133

4.7P(UJ)

D303

1SS133

C307

0.0047

FM SIGNAL

FM FRONT END

C302

C303

0.01

C310

0.001

L302

FM RF

R303

100K

R302

22

R301

C308

C311

0.022

0.0047

IC301

TA7358AP

4 3 2 1

6

5

C304

4.7P(CH)

VD302

SCV211C

C313

0.022

33K

C312

0.001

C384

0.001

8

7

10

R306

C305

15P(CH)

T301

FM IF

R311

220K

0.7V

9

C319

C306

18P(CH)

L303

FM OSC.

R312

4.4V

0V

2SC535 C

OSC BUFF

C392

0.001

C381

12P(CH)

C382

15P(CH)

D304

1SS133

FM BAND
COVERAGE fL

0.022

C314

10/16

C317

3.9P(UJ)

1

3

2

680

C316
100P

Q302

X352

4.5MHz

D305

1SS133

+B

VD303

SCV211C

R320

C318

22P(CH)

R314

CF301

R316

4.7K

C393

22

10K

10K

1/50

21

VSS

X OUT

NC

X IN

20

A OUT
CE

C332

0.022

R323

TP301

C338
100P

R380

1.5K

19

18

PD

A IN

CL

DI

4 3 2 1

5

C331

68K

+B

R379

17

6

0.047

C334

2.2K

16

VDD
DO

AM TRAC
fL

AM AN

C330

8.2P(UJ)

VD331

SVC348S

C335
560P

AM OS

22P(UJ)

AM BAND
COVERAGE fL

R317

820

R381

10K

C369
47/25

C383

0.022

14

15

13 12

NC

FM IN

AM IN
NC

NC

BO1

10

8

9

7

T331

T333

IO2

BO4

11

MT

IF INIO1

Z

AM SIGNAL

MAIN PWB-A1(1/3)

G

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 15.

1

23456

Figure 22 SCHEMATIC DIAGRAM (3/10)

– 22 –

R372 1K

R373 1K

R374 1K

R371 1K