AIWA CDC622, CD-C2900 Service Manual

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

Illustration: CD-C622	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
	Page
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)

This document has been published to be used

SHARP CORPORATION– 1 –	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
	TEST PROBE	CONNECT TO
	TO EXPOSED	KNOWN EARTH
	METAL PARTS
		GROUND

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.

– 2 –

CD-C622/C2900

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)

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

NAMES OF PARTS

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

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

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)

1

2

3

4 5

6 9

7 10

8 11

12 13 14

15

16

17

18	19	20
21		25
22		26
23		27
24

28 29 30 31 32 33 34

35 36

1	3
	4
	5
2	6

(Illistration: CD-C622)

– 4 –

Front Speaker

CP-C622

1.Super Tweeter

2.Woofer

3.Bass Reflex Ducts

4.Speaker Wire

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

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

CD-C622/C2900

1

2

4 3

1

2

3

4

5

1

2

1

2			8
3			9
4			10
5			11
6			12
7
13 14	15	16	17 18

19

20

21

23

22

– 5 –

– 6 –

SETTING THE CLOCK

(Main unit operation)

In this example, the clock is set for the 12-hour (AM 12:00) system.

	CLOCK
	POWER	TUNING/
	MEMORY/	TIME
		( )
	SET

2

3

4

AM 12:00 AM 0:00 0:00

5

6

7

8

9

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
5	or it has been reset.
	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 automatically 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.

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

To change the clock time:

1Press the CLOCK button.

2Within 5 seconds, press the MEMORY/SET button.

3Perform 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:

1Perform steps 1 - 2 in the section "RESETTING THE MICROCOMPUTER", on page 19.

2Perform steps 1 - 9 above.

RESETTING THE MICROCOMPUTER

2

1,2

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 button, 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.

C622/C2900-CD

MANUAL OPERATION

MINI COMPONENT SYSTEM

Quick Guide/Guía rápida CD-C622

1 Check the supplied accessories / Compruebe los accesorios suministrados

Remote control x 1	FM/AM loop antenna x 1	AC power cord x 1
	Antena de cuadro de	Cable de alimentación
Controlador remoto x 1	FM/AM x 1	de CA x 1

2 Preparation for use / Preparación para su uso

Speaker connection			Antenna connection
Conexión de los altavoces			Conexión de las antenas		AM Loop Antenna
Rear speaker (Right)		Rear speaker (Left)			Antena de cuadro
Altavoz trasero (Derecho)		Altavoz trasero (Izquierdo)			de AM
				FM Antenna
–	Black			Antena de FM
	Negro
– 7		Wire with the
Wire with the
		white line
white line
		Cable con la
Cable con la
		línea blanca
línea blanca
Red		Red
Rojo		Rojo
	Black				AC 120 V, 60 Hz
					120 V de CA, 60 Hz
Front speaker (Right)	Negro	Front speaker (Left)
Altavoz delantero		Altavoz delantero
(Derecho)		(Izquierdo)
Turning the power on and off			Remote control
Conexión y desconexión de la alimentación			Controlador remoto		Remote Sensor
					Sensor remoto
			2 “AA” batteries	8” - 20’ (0.2m - 6m)
POWER			Dos pilas “AA”
				0,2m - 6m
		POWER				15
					15

Batteries are not included.

Las pilas no están incluidas.

3 Listening to a CD / Audición de discos CD

To stop the playback

Para detener la reproducción

Label facing up

Etiqueta hacia arriba

4 Listening to a tape / Audición de una cinta

To stop the playback

Para detener la reproducción

TAPE 1

TAPE 2

5 Listening to the radio / Audición de la radio

6 Recording from CDs / Grabaciones de discos CD

			To stop the playback
			Para detener la reproducción
	Load the disc to be	TAPE 2	CD recording
	recorded.		starts.
	Introduzca el disco		La grabación de
	que va a grabar.		CD empieza.
	7 Sound control / Control del sonldo
	Volume	Extra bass (X-BASS)	Pre-programmed equalizer			-CD
	Volumen	Graves extra (X-BASS)	Ecualizador preprogramado
						C622/C2900
	VOLUME
			FLAT	HEAVY-1	HEAVY-2
			SOFT-2	SOFT-1	VOCAL

MINI COMPONENT SYSTEM

Quick Guide/Guía rápida CD-C2900

1 Check the supplied accessories / Compruebe los accesorios suministrados

	Remote control x 1	FM/AM loop antenna x 1		AC power
		Antena de cuadro de		Cable de alimentación
	Controlador remoto x 1
		FM/AM x 1		de CA x 1
	2 Preparation for use / Preparación para su uso
	Speaker connection		Antenna connection
	Conexión de los altavoces		Conexión de las antenas		AM Loop Antenna
					Antena de cuadro
					de AM
				FM Antenna
				Antena de FM
8 –	Front speaker	Front speaker
–	(Right)	(Left)
	Altavoz delantero	Altavoz delantero
	(Derecho)	(Izquierdo)
	Red	Red
	Rojo	Rojo
					AC 120 V, 60 Hz
	Black	Black			120 V de CA, 60 Hz
	Negro	Negro
	Turning the power on and off		Remote control
	Conexión y desconexión de la alimentación		Controlador remoto		Remote Sensor
					Sensor remoto
			2 “AA” batteries	8” - 20’ (0.2m - 6m)
	POWER		Dos pilas “AA”
				0,2m - 6m
		POWER				15
					15

Batteries are not included.

Las pilas no están incluidas.

3 Listening to a CD / Audición de discos CD			-CD
		To stop the playback	C622/C2900
		Para detener la reproducción
Label facing up
Etiqueta hacia arriba
4 Listening to a tape / Audición de una cinta
		To stop the playback
		Para detener la reproducción
TAPE 1	TAPE 2

5 Listening to the radio / Audición de la radio

6 Recording from CDs / Grabaciones de discos CD

		To stop the playback
		Para detener la reproducción
Load the disc to be	TAPE 2	CD recording
recorded.		starts.
Introduzca el disco		La grabación de
que va a grabar.		CD empieza.

7 Sound control / Control del sonldo

Volume	Extra bass (X-BASS)	Pre-programmed equalizer
Volumen	Graves extra (X-BASS)	Ecualizador preprogramado
VOLUME
		FLAT	HEAVY-1	HEAVY-2
		SOFT-2	SOFT-1	VOCAL

CD-C622/C2900

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

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 .....................	(G2) x12
8	Tape Mechanism	1.	Open the cassette holder.		10-2
		2.	Screw......................	(H1) x5
9	Headphones PWB	1.	Screw .....................	(J1) x1	10-2
		2.	Support Bracket .....	(J2) x1
10	Turntable	1. Screw .....................		(K1) x1	10-3
		2.	Cover .....................	(K2) x1
11	Disc Tray	1. Screw .....................		(L1) x2	10-3
		2.	Guide .....................	(L2) x2
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

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.

(Illustration: CD-C622)

CD-C622/C2900

Top Cabinet

(A1)x2

ø3x12mm

(B2)x1

(B1)x1

ø3x8mm

Side Panel
(Right)
		(A1)x2
		ø3x12mm
Back Board	Side Panel
	(Left)
(B1)x4	(B2)x1
ø3x8mm	(B1)x1
	ø3x8mm
	Figure 9-1
(C2) x1	CD Tray Cover	Hook
Pull		( C1) x3
	1
(C3) x3
		1
CD Player		2
Unit
		( C2 ) x1

Back Board

Main PWB

(D1)x5 ø3x8mm

Figure 9-2

LOCK

LEVER

Figure 9-3

– 9 –

CD-C622/C2900

(E1)x1

ø3x10mm

(E2)x2	Front Panel

(E3)x1

(E5)x1

(E2)x2

(E4)x1

(G1)x1

(E1)x2 ø3x8mm

Main PWB	(F1)x1
	ø3x8mm

Figure 10-1

(G1)x1

Switch PWB

Front Panel

(G2)x2 ø3x10mm

Display PWB

(G2)x10

ø3x10mm Headphones PWB

Open

(J2)x1

Cassette

Holder

	(J1)x1	Tape Mechanism
	ø3x10mm
		(H1)x5
		ø3x10mm

Figure 10-2

( K1 ) x1 ø3 x10mm

( K2 ) x1

Washer

Turntable

Disc Tray

( L1 ) x1 ø3 x10mm

( L2 ) x1

( L1 ) x1 ø3 x10mm

CD Player Unit	( L2 ) x1
Figure 10-3

( 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

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

– 10 –

CP-C622

STEP	REMOVAL		PROCEDURE		FIGURE
1	Front Speaker	1. Front Panel ............		(A1) x1	11-1
		2.	Tip ..........................	(A2) x2
		3.	Screw .....................	(A3) x4

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.

CD-C622/C2900

CP-C622
Front Panel	Piezo	(A3)x4	(A2)x2
(A1)x1		ø4x12mm

Woofer

Screw Driver

							Figure 11-1
	CP-C2900					CP-C2900
STEP	REMOVAL	PROCEDURE		FIGURE
1	Front Speaker 1. Front Panel ............		(A1) x1	11-2	Front Panel	Super	Tweeter
	2.	Tip	(A2) x2			Tweeter
					(A1)x1		(A3)x2
	3.	Screw	(A3) x2
							ø3x10mm
	4.	Screw	(A4) x2
	5.	Screw .....................	(A5) x4				(A2)x2

(A4)x2 ø3x10mm

(A5)x4

ø4x14mm

Woofer

Screw Driver

Figure 11-2

– 11 –

CD-C622/C2900

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.

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.

Loading / Up

/ Down Motor

Motor

PWB

( A1 ) x2 ø2.6 x5mm

Figure 12-1

	( B1 ) x2	Stop Washer
		( B3 ) x1
	ø2.6 x6mm

Pickup

	Shaft	CD Mechanism
		Gear
	( B2 ) x1
		( B4 ) x1
		Figure 12-2

– 12 –

CD-C622/C2900

ADJUSTMENT

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	Specified Value
	Tape 1	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
∙ Tape Speed

	Test Tape	Adjusting	Specified	Instrument
		Point	Value	Connection
Normal	MTT-111	Volume in	3,000 ±	Speaker
speed		motor.	30 Hz	terminal
		(MM1)		(Load
				resistance:
				8 ohms)

TUNER SECTION

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

∙ AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage	Frequency		Frequency	Setting/	Instrument
			Display	Adjusting	Connection
				Parts
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

MM 1

Motor

Volume in motor

MAIN PWB

∙ FM RF

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

Test Stage	Frequency	Frequency	Serring/	Instrument
		Display	Adjusting	Connection
			Point
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)

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

∙ Detection

Signal generator: 10.7 MHz, FM sweep generator

Test	Frequency		Frequency			Adjusting		Instrument
Stage			Display			Parts		Connection
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.)
∙ VCO Frequency
Frequency		Frequency				Adjusting		Instrument
		Display				Parts		Connection
98.00 MHz		98.00 MHz			VR351*			Pin 13, Pin 21
(60 dB)								and ground
								of IC303
* 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.

Pin 13 of IC303 Pin 21 of IC303
G	D	FET : 2SK19 or 2SK54
	S		TO FREQUENCY
			COUNTER
		10 kΩ

1	L301	Figure 13-2

			IC301
				L302	CNP301
		L303	T301		AM LOOP
	FM BAND			FM RF	ANTENNA
			FM IF
	COVERAGE fL
		T351			T331
		AM IF	TP301		AM TRACKING
					fL
		1	T333		AM BAND
		IC303
			T352		COVERAGE fL
	13	21
		R340		FM DET
		VR351
		VCO	TP302

Figure 13-1 ADJUSTMENT POINTS

– 13 –

CD-C622/C2900

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.				) or (		) key.		IL is not performed.
The pickup can be moved by using the (
		<MEMORY>		<MEMORY>			<MEMORY>			<STOP>
		LASER ON		Tracking on the spot.			Tracking on the spot.				STOP
				SERVO OFF PLAY			SERVO ON PLAY

<PLAY> key input

TOC. IL is performed, and the ordinary PLAY is performed.

Press <STOP> key.

Stop

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

Note:

Only in STOP state it is possible to slide the pickup with the (

) or (

) key.

VOL. --- Last memory

BAL. --- CENTER

1

2

3

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
		1 ADJUST

		2
		Figure 14-2
	200 ms	TRACKING/
	1V/diV	ERROR
	IC 1 15	BARANCE
	TO	1 ADJUST
	200 ms
	1V/diV
	IC 1 7	2
	TE
		Figure 14-4

10ms 0.50 V

IC1 20 FE

10ms 0.50 V IC1 7 TE

Figure 14-3

Enlarged

View

TRACKING

OFF-SET 1 ADJUST

2

– 14 –

CD-C622/C2900

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.

∙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
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

E	C	B
(S)	(G)	(D)
(1)	(2)	(3)
KTA1266 GR		KRC104 M
2SA1015 GR		KRC107 M
2SA1318		KTA1271 Y
2SC3331		KTA1273 Y
2SC535 C		KTA1274 Y
KRA102 M		KTD2058 Y
KRA109 M		KTC3200 GR
KRC102 M		KTC3203 Y

REF. NO	DESCRIPTION	POSITION
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

L1154GT4

SLI342YCB

SLI342DCB

SLI342UCB

SLI342YCJ

Figure 15 TYPES OF TRANSISTOR AND LED

– 15 –

CD-C622/C2900

WAVEFORMS OF CD CIRCUIT

STOP PLAY

FOCUS SERCH

	1	5ms
		0.50 V	F.E
		IC1 20
	2	5ms
		5.0 V
		IC1 54	DRF	3
				1
	3	0.5ms		CUE
		1.00 V
		HF
	4	0.5ms		1
		5.0 V		2
		HFL
	5	0.5ms		3
		5.0 V
		TES
	3	0.5ms		REVIEW
		1.00 V
		HF
	4	0.5ms		1
		5.0 V		2
		HFL
	5	0.5ms		3
		5.0 V
		TES
	6	50ms		CUE
		10.0 V
		JP+
	7	50ms
		10.0 V
		JP-
	8	50ms
		0.50 V
		JP
	9	50ms
		1.00 V
		TE
	6	0.5ms
		10.0 V
		JP+
	7	0.5ms
		10.0 V
		JP-
	8	0.5ms
		0.50 V
		JP
	9	0.5ms
		1.00 V
		TE
	6	50ms		REVIEW
		10.0 V
		JP+
	7	50ms
		10.0 V
		JP-
	8	50ms
		0.50 V
		JP
	9	50ms
		1.00 V
		TE

6	0.5ms
	10.0 V
	JP+
7	0.5ms
	10.0 V
	JP-
8	0.5ms
	0.50 V
	JP
9	0.5ms
	1.00 V
	TE
	PLAY
	NORMAL DISC
	TN0=01
10	20ms
	1.00 V
	SPO
11	20ms
	2.00 V
	CLV+
	PLAY
	TCD-712 (140mm)
	TN0=01
	50ms
10 1.00 V
	SPO
11	50ms
	2.00 V
	CLV+
12 100mV5s
	SLD
	1
12	0.5s
	100mV
	SLD
	1

PLAY

TCD-712

– 16 –

17 –	BLOCK 17 Figure
–	DIAGRAM
	(1/3)

PICKUP UNIT

FOCUS COIL

TRACKING COIL

M2	M1
SLED	SPINDLE
MOTOR	MOTOR
M	M

PICKUP IN

SW4

			+5V
		Q1			Q52	+B1			+5V
							XL1
		62	64				45	44	6 23 36 41 43			BI1B
		LD0	VCC1				XIN XOUT		VVDD VDD LVDD	RVDD XVDD	31	2
												1
						2		IC2
					22	4	LC78622NE			LCHO 37
						8	SERVO/SIGNAL LVSS 38
		IC1				11				RVSS 39
					JP– 32	9 EFMO CONTROL				RCHO 40
1	FIN2	LA9241M			~	10 EFMIN
2 FIN1		SERVO AMP. CV+ 40				12 CLV+						Q51
3 E					SLC 43	~					27
4	F				SL1 44	20 JP–				CONT1 24
	TO FD SPO NC SLD		SL– SL+	DRF	CL DAT CE		RES. CQCK. COIN			CONT2 25
							SQOUT. RWC. WRQ
	15 16 27 23 29		30 31 54		51 52 53		51 62 ~ 64	53 ~ 58	26 33 38 39 46
					CL, DAT, SELIAL CONTROL/CE
	1 2 7 20 25				SL+. SL–. DRF
				42
23				41
6		IC3		20
				40	+B1
7	M63001FP			24
4
		FOCUS/		18
5
	TRACKING/			28	+B5
15	SPIN/SLED			39
16		DRIVER		38
26				37
27				36
	8 ~ 14 21 22 29 ~ 35

PU-IN SW

+4.3V

CNP99

3

2	+5V
1
BI1A
2
1
1
2	TO MAIN SECTION
3
4	(TO IC601)
5
6

CNP11

10	GND (D)	10		SW2
9	MECHA UP	9		MECHA UP
8	GND (D)	8		SW3
7	DISK NO.	7		DISC No.
6	OPEN/CLOSE	6		SW1
5	GND (D)	5		OPEN/CLOSE
4	M–	4	M	M3
3	M+	3		LOADING
2	GND (M)	2
1		1		SOLM1
CNP10		CNS10

TO MAIN

SECTION

		-CD
REGULATOR		C622/C2900
Q81	+7.3V (B1)

CD-C622/C2900

FM	AM LOOP							SWM3
ANTENNA	ANTENNA							FOOL PROOF
								SWM4
								F.A.S
			IC301					SOLM1
					FM IF	+B4	+B4	SOLENOID
	L301	1	TA7358AP	6	T301	CF301		SWM5
			FM FRONT END					CAM
	FM B.P.F

2	3	4				9
			5	7	OSC	8
				FM		FM OSC
	L302		FM RF			L303

						VR351
	AM IF					MPX VCO ADJ
FM IF IN	T351	CF351			T352		MONO/ST
					FM DET
1	3	5	6	21	20	13	15
	AM MIX	AM IF GND FM+B FM DET				VCO	MO/ST

OSC BUFF

			IC303
		LA1805
	FM/AM IF MPX.
FMOSC	24	23	22	7
Q302		AM+B	AM RF IN	STEREO
	OSC IN
	AM

		L 9
		R 10
DET OUT	MPX IN	FM/AM
17	16	11
	Q350

Q343

AM BAND

AM TRACKING COVERAGE FM/AM SWITCHING

T331

T333

		X352	IN	IN
	4.5MHz
			AM	FM		CE	DI
VT
20	1	22	15	16	11	3	4
	OSC		IC302
			LC72131
			PLL (TUNER)

	+B7	1	IC704	3
			2
CL	DO	VOLTAGE
5	6
		REGURATER
	17		+B4

7

10

21

FM +B

Q344

FM

SWITCHING

JK601

–B4

VIDEO/AUX

11

10

L

AUX

L 5

R

TAPE

R 16

IC601

L 4

13 R

R 17

CNS11

TUNER

M62439SP

8 L

L 3

1

CD

R 18 AUDIO PROCESSOR

FROM CD SECTION

2

L 2

CNP11

IC101

R 19

3

AN7345K

1

20

9

PLAYBACK AND RECORD

/PLAYBACK AMP.

TAPE 1 L-CH

L(T1) 1

13

+B4

R(T1) 24

P.B.

4 L

PB HEAD

R-CH

L(T2) 2

PB

Q121

REC

21 R

R(T2) 23

Q122

REC

SWITCHING

L NF 3

5

MUTING

P.B

R NF 4

20

TAPE 2

L-CH

Q103~Q106

POP REDUCE 6

T1/T2

H/N

7

L REC

R-CH

REC PB HEAD

L REC 9

REC

18

R

R REC 16

8 L NF

AC BIAS

REF 14

17 R NF

10 ALC

12

NOR/

T1/T2

HIGH

15

19

T1/T2

SWITCHING

SWITCHING

Q107

Q111

Q108

Q109

SWITCHING

Q110

BIAS

SWITCHING

BAIS

OCS

Q128

Q124

Q126

BAIS

ERASE

L104

L103

HEAD

Figure 18 BLOCK DIAGRAM (2/3)

– 18 –

CD-C622/C2900

SWM3

PROOF

FL701

SWM4

F.A.S

DISPLAY

SOLM1

ENOID

M

SWM5

Q702

1 2 3

4 ~ 15

16 ~ 25

26 ~ 28

29 ~ 36

37 38 39

Q703

CAM

MM1

351

TAPE MOTOR

Q705

CO ADJ

Q706

MONO/ST

Q707

3

15

CO

MO/ST

L

9

R 10

51 52 53 5455 5657 58 59 60 6162 63 64 65 66 67 68 69 70 71 72 73 7475 76 77 78 79 80

FM/AM

50

81

11

49

82

48

83

+B7

47

84

46 VDD

85

45

86

44

IC701

87

43

88

Q343

42

IX0280AW

89

41

90

AM

SYSTEM CONTROL

40

91

TCHING

39

MICROCOMPUTER

92

IC704

1

3

38

93

2

37

94

+B7

36

95

1

35

96

34

AVDD

97

RX701 3

33

VDD

98

UNSWITCH

2

32

99

+B7

31

VDD

100

MEMORY

+B7

30 29 28 2726 2524 23 22 21 2019 18 17 16 15 14 13 12 11 10 9

8

7 6

5 4

3

2

1

BACK UP

AGE

ATER

TO CD

+B1

+B4

+B5

+B7

SECTION

KEY

SW701

M901

~SW730

PHM1

XL701

Q704

Q960

M FAN MOTOR

4.19MHz

+B5

–B4

JK970

Q908

HEADPHONES

RL901

SO901

13 R

14

IC901

FRONT

SPEAKER

TERMINAL

P

8 L

10

STK40704

6

L-OUT

ESSOR

POWER AMP.

7

R-OUT

REAR

622

Q601

Q603

SPEAKER

ONLY

+B

Q602

Q604

–B

3

15

T801

POWER

1 2

D801

F802

TRONSFORMER

FRONT

4A/125V

SPEAKER

VOLTAGE

REGULATOR

F803

+7.3V

+B1

Q822

4A/125V

Q121

REC

Q122

UTING

VOLTAGE

RL801

+B4

+12V(ANALOG)

REGULATOR

Q824

D803~D806

VOLTAGE

+B5

+12V(MOTOR)

Q823 REGULATOR

AC POWER

SUPPLY CORD

+B2

+5.6V

Q821

VOLTAGE

T.F

REGULATOR

F805

ZD801

Q801

D807

2A/250V

AC 120V, 60Hz

~D809

T1/T2

+B6

+5V

Q802

+B7

UNSWITCH

Q803

BAIS

T802

POWER

D810~D813

TRONSFORMER

Figure 19 BLOCK DIAGRAM (3/3)

– 19 –

CD-C622/C2900

A

R2

1K

C15

C1

47/16

0.01

Q1

R1

0.33/50

0.47/50

2SA1318

C34

C33

22

C2

0.01

C3

C32

0.01

C31

220/6.3

C30

0.1/50

1/50

CNS1B5

R46 560

NC 48R454.7K

CNS1A

64 63

62

61 60

59

58

57

56

55 54 53 52 51 50 49

K

9

VCC1

LDS

LDO

BHI

PHI

LF2

REF1

VCC2

FSS

CE

DAT

CL

CLK

DEF

–

E

4

1

1

K

1

FIN2

–

+

RF

+

DRF

C28

A

REF

–

0.1

B

+

VR

A

3

2

2

B

2 FIN1

FE1

REF

2

EFBAL

TBC 47

C29

4.7/50

–

–

+

B

2

3

3

E

3

EREF

+

+

REF

–

DEF

FOSTA

FSC

46

F

1

4

4

–

F

+

HFL

TOSTA

DGND 45

5

5

C4

4 F

REF

–

VCR

VCR

CE

REF

SLI

44

+

2FREQ

CNP1

TB

+

DRF

CL

C26

R44

0.1/50

5

–

LATOH

R8

–

VCR

IC1

LASER

C27

0.001

0.033

33K

TE

R9

15K

6

TE–

REF

–

VCR

+

LA9241M

FSTA

R41

100K

TE

+

8/12CM

3

R42

7

SERVO AMP.

47K

C5

REF

+

SLOF

SLC 43

R40

C25

47K

R10

–

REF

+

R39

C54

0.033

–

27P

2.2K

8

TESI

VCC

RFS–

42

5.6K

1K

0.001

C6

+

–

REF

CV–

REF

C24 2.2P

R43 56K

R11

0.033 9 SCI

+

+

+–

R38

+

6.8K

TGL1

–

–

CV+

470

–

REF

RF

RFSM 41

C

C7

REF

R12

TH

THDL GL

S.Q.R

FSTA REF

+

JP–

HF

C23

100

0.1/50

JP

4

TP1

0.0027

LD

MON

R13

C9

C8

10

NC

THD

–

JP+

CV+

40

K

1K 0.047

0.068

11

+–

JP

JPCLO

CV–

39

E

FSC

REF+– FE1

REF +–

SLOF

SLOF

SLOF

B

12 TD–

10

38

R15

C10

180P

GEN

+

REF

FOSTA

OR

5

HFL

R14

LD GND

–

TO

GEN

SLOF

37

5

K

27K

12K

REF

+

REF

13

TD

REF

+

GEN

–

+–

REF

+

TES

36

A

4

E

R16

–

3.3K

14 JP

–

TOFF

35

F

3

A

+REF

C

15

TO

+–

–

REF SPI

SLEOREF

+

TGL

34

2

B

AGND SP

–

JP+

16 FD

SPG

SPO

SL–

SL+

33

LT0H30M1

1

F

8

FD–

FA

FA–

FE

FE–

SP–

SLD

JP–

R17

6

17

18 19

20 21 22 23

24 25

26

C17

27 28

29 30

31 32

C22

33K

TR–

C13

330P

R31R2810K

0.001

220P

TR+

1

R18

C16 0.0047

R29 56K

C20

47/16

C19 1/50

D

2

TR+

R21 R20 1.5K 1K

C11

R23 10K

R26

FO+

3

FO+

0.1

15K

82K

R36

R19 1K

C14

R33 R32

4

FO–

R22 820

220K

FO–

0.01

R30

1.2K 10K

TR–

5

GND

1

R24

R25

R27

1.2K

6.8K

0.0033

7

39K

C21

ACTUATOR

6

PD

47K

1.5K

R34

7

VR

VREF

3.3K

R35

8

LD

C12

C18

220K

GND

C57

0.47/50

0.1

0.001

C35

1/50

PICKUP UNIT

R37

D1

+B

1SS133

82K

1

TO

LD_M+ 42

+B

E

2

FD

LD_M– 41

C76

3

FO (GAIN)

VCC4 40

4

FO+

M+ 39

PD

0.022

5

FO–

M– 38

FOCUS/TRACKING/SPIN

CNS2B

CNS2A

6 TR+

SOL– 37

TR–

TR–

1

1

1

7

TR–

/SLED DRIVER

SOL+ 36

TR+

TR+

2

2

2

8

M63001FP

35

FO+

+B

FO+

3

3

3

9

34

+B

FO–

C82

FO–

4

4

4

10

IC3

33

100/16

GND

5

5

5

11 GND

GND 32

C77

PD

6

6

6

12

31

100/16

VR

7

7

7

13

30

LD

+B

LD

8

8

8

14

29

F

CNP2

15

SL–

VCC3

28

+B

16

SL+

SP+ 27

C36

17

SLD

SP– 26

100/16

18

VCC1

SPO 25

GND

C55

19

STANDBY

(SPN)VCC2 24

20

Vref

SOLD 23

CD MOTOR PWB-C

CD

100/16

21 MUTE

SOL– 22

R56 6.8K

CNP3A

CNS3B

CNS3A

+B

+B

CQ CK(DSP) R47

10K

C37

0.022

+B

M1

M

+

SP+

6

6

6

6

SPINDLEMOTOR

–

SP–

+

5

5

5

5

SL_+

M2

4

4

4

4

SL_–

G

SLED

M –

3

3

3

3CNP3

RWC(DSP)

WRQ(DSP)

IN(DSP)CO

OUT(DSP)SQ

RES(DSP)

DRF(ASP)

GNDD

SLD+

SLD–

MOTOR

CD_PUIN

SW4

2

2

2

2

PICKUP

1

1

1

1

IN

CNP12

1

2

3

4

5

6

7

8

9 10

CNS12

P29 12 - B

TO DISPLAY P

H

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

1

2

3

4

5

6

Figure 20 SCHEMATIC DIAGRAM (1/10)

– 20 –

CD-C622/C2900

R57 1K

R58 1K

R59 1K

R61 1K

CD SIGNAL

R62 1K

C44 100P(CH)

C45 100P(CH)

C47 100P(CH)

C49 100P(CH)

R63 1K

C46 100P (CH)

C48

100P

C38

R60 1K

0.01

+B

+B

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50

49

TEST1 /CS

TEST5 4M

TEST11 NC

NC

NC

EFLG

16M

NC

/RES /CQCK

COIN

SQOUT RWC

WRQ

FSXNC

SUBSFSY -CODEPW

48

XL1

NC

C41

SBSY

47

12P

16.934 MHz

-COM

SBCK

NC

1 DEF1

INTERFACE

XVSS 46

C42

2 TA1

XIN 45

15P

R51

X-TAL

R93

3.3M

XOUT

44

3 PDO

2KX8

GENERATOR

C39

R50

OSC CONTROL

220

CNP11

VCO CLOCK

RAM

0.022

1SS133

D82 1SS133

0.047

680

4 VVSS

XVDD 43

C83

D81

5 ISET

MUTER

42

R-CH

C40

NC

C72

1

0.047

ERROR COERECT

RVDD

41

10/50

CD_RCH

A_GND

2

P24 1 - B

R52

RCHO

L-CH

FLAG CONTROL

@DAC

40

R72

C74

3

CNS11

27K

6 VVDD

RVSS

39

R74

D-GND

4FS

2.7K

220P

A_GND

4

TO MAIN PWB

R53

7 FR

100K

+7V

DIGITAL

C73

5

1.2K

8 VSS

FILTER

1BIT

LVSS 38

R71

C71

R73

+12V

220P

CD_LCH

6

9

EFMO

SLICE

SYNC-DETECT

LCHO

37

2.7K

10/50

100K

10 EFMIN

LEVEL

EFM DEMODULATE

LVDD 36

Q52

CONTROL

R55

11 TEST2

IC2

MUTEL

35

+B

KTC3203 Y

LC78622NE

NC

C43 100

R66

+B

12 CLV+

CLV

34

330/6.3

+5V

13

CLV_

DIGITAL

SERVO/SIGNAL

TEST4 33

R65

R64

220

SERVO

CONTROL

14 V/P

1K

L61

22

ZD61 MTZJ5.6B

15 HLF

EXTERNAL

DIGITAL

+B

0.82 H

C75

0.001

SERVO

OUT

C51 100/16

16

TES COMMAND

OUTPUT

TEST3 NC

C50

C52

100/16

PCK NC FSEQ NC VDD

CONT1 CONT2

CONT3

CONT4

CONT5 NC EMPH NC C2F NC

DOUT

C22

11

TOFF TGL JP+

JP_

0.022

220P

17 18 19

20 21 22 23

24 25 26 27 28 29 30 31

32

+B

+B

R88 1.2K R89 1.2K

R90 220

R91 1K

+B

+B

CNP99

BI1A

+B

+B

BI1B

+B

2

C56

R54

1

P25 10 - B

2

3

330

CNS99

C57

0.022

1

2

+B

0.001

TO DIGITAL

1

OUTPUT PWB

33

+B

+B

R82

R80

390

820

R83 390

R81

CD SERVO PWB-B

1SS133

820

D92

2

3

SOLM2

D93

1

1SS133

R84

SOLENOID

2.2K

D91

LOCK

Q51

1SS133

KRC102 M

BIM05

1

SOL+

1

1

M3

2

SOL–

2

2

M–

–

T/T

3

M–

3

3

UP/DOWN

M+

4

M+

4

4

M LOADING

+

5

GND(D)

5

5

SW1

CD_D_NO

6

DISC NO.

6

6

OPEN

CLOSE

7

OPEN CLOSE

7

SENSOR PWB-D

8

GND(D)

8

9

MECHA UP

9

SW2

R47

10K

10

GND(D)

10

MECHA UP

C37

0.022

CNP10

CNS10

DISC NO

1

1

SQ OUT(DSP)

SW3

CO IN(DSP)

CQ CK(DSP)

PCCL

2

2

DISC NUMBER

RES(DSP)

DRF(ASP)

CNS5

D GND

SLD+

SLD–

PUIN SW

OP/CLOS

DISC NO.

UP/DOWN

3

4

5

6

7

8

9 10 11 12 13 14 15

CNS12

P29 12 - B

TO DISPLAY PWB

• 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

A

AM LOOP ANT

CNP301

FM ANT

AM TRACK

1

1

C315

fL

6.8P(UJ)

C330 8.2P(UJ)

AM AN

2

2

IC301

C332

0.022

C331

0.047

FM BAND

T331

B

3

3

TA7358AP

FM FRONT END

COVERAGE fL

C301 82P

L301

1

2

3

4

5

6

7

8

9

+B

SCV211C C304

4.7P(CH)

C305 R306

C319 0.022

C314 10/16

R304

D303

1SS133

D3011SS133

10P(CH)

R301

33K

15P(CH) 10

CF301

R314

10K

C334

22P(UJ)

VD331

D302 82 1SS133

C309 4.7P(UJ)

L302

B.P.F

C302

R305

C310

C306

VD303 SCV211C

SVC348S

C303

C317

T333

82

0.01

18P(CH) 3.9P(UJ)

RF

VD302

L303

C318

22P(CH)

R323 68K

T301

0.001

R320

C

10K

C335

AM OSC

FM OSC.

560P

FM

R303 100K

C313

1

3

TP301

AM BAND

COVERAGE fL

0.022

R302

FM IF

2

22

R317

D

0.0047

R311

R312

R316

820

C307

0.0047

C308

C311

0.022

C312

0.001

680

100P

100P

R381

0.7V

4.7K

220K

4.4V

C316

C338

0V

10K

Q302

C393

+B

C369

1/50

47/25

C384

2SC535 C

R380

C383

0.001

OSC BUFF

1.5K

0.022

C392

R379

2.2K

ZD

0.001

E

MTZ

C381

12P(CH)

22 21 20 19 18 17 16 15 14 13 12

X352

4.5MHz

X IN X OUT

NC VSS

CE A OUT

DI A IN

CL PD

DO VDD

BO1 FM IN

NC AM IN

NC NC

BO4 IO2 IO1 IF IN

C382

1

2

3

4

5

6

7

8

9

10 11

15P(CH)

FM SIGNAL

D304

D305

1K

1K

1K

1K

F

1SS133

1SS133

R374

R373

R372

R371

AM SIGNAL

MAIN PWB-A1(1/3)

G

H

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

1

2

3

4

5

6

Figure 22 SCHEMATIC DIAGRAM (3/10)

– 22 –