AIWA CDC452, CD-C452C Service Manual

CD-C452/C452C

SERVICE MANUAL

Illustration: CD-C452/C452C

Manufactured under license from Dolby Laboratories Licensing Corporation. DOLBY, the double-D symbol and "PRO LOGIC" are trademarks of Dolby Laboratories Licensing Corporation.

QSOUND and the QLogo are registered trademarks of QSound Labs, Inc.

QSound is protected under US Patent Nos. 5,105,462 and 5,208,860 and foreign counterparts.

No. S4825CDC452//

CD-C452/C452C

CP-C452 Constitute CD-C452/C452C.

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

This Service Manual is for the CD-C452/452C, which is a minor-
modification model of the CD-C472. This manual, therefore,
describes only the changed points from the Service manual.
Please refer to the CD-C472 Service Manual (No. S2812CDC472//)
together with this manual.
CD-C472
	Page
OPERATION MANUAL ....................................................	5
REMOVING AND REINSTALLING THE MAIN PARTS	... 10
ADJUSTMENT ...............................................................	12
TROUBLESHOOTING
(CD CHANGER CONTROL / CD SECTION) ................	34
FUNCTION TABLE OF IC ..............................................	38
FL DISPLAY ...................................................................	44

CONTENTS
	Page
IMPORTANT SERVICE NOTES (For U.S.A. Only) ..........................................................................................................	2
SPECIFICATIONS .............................................................................................................................................................	2
NAMES OF PARTS ..........................................................................................................................................................	3
QUICK GUIDE ..................................................................................................................................................................	5
DISASSEMBLY .................................................................................................................................................................	6
NOTES ON SCHEMATIC DIAGRAM ...............................................................................................................................	9
WAVEFORMS OF CD CIRCUIT .....................................................................................................................................	10
BLOCK DIAGRAM ..........................................................................................................................................................	11
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD .............................................................................................	14
FUNCTION TABLE OF IC ................................................................................................................................................	28
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-C452/C452C

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.

CD-C452/C452C

General

Power source:	AC 120 V, 60 Hz
Power consumption:	80 W
Dimensions:	Width; 10-5/8" (270 mm)
	Height; 11-13/16" (303 mm)
	Depth; 13-13/16" (350 mm)
Weight:	13.8 lbs. (6.3 kg)

SPECIFICATIONS

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)

Amplifier section

Output power:	FTC; 40 W minimum RMS per channel into
(CD-C452)	6 ohms from 60 Hz to 20 kHz with no
	more than 10 % total harmonic distortion.
Output power:	MPO; 176 W (88 W + 88 W)
(CD-C452C)	(10 % T.H.D.)
	RMS; 80 W (40 W + 40 W)
	(10 % T.H.D.)
Output terminals:	Speakers; 6 ohms
	Headphones; 16-50 ohms
	(recommended; 32 ohms)
Input terminal:	Video/Auxiliaary (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)

Front speaker section

CP-C452

Type:	3-way type [5-1/8" (130 mm) woofer , 2" (50
	mm) tweeter and super tweeter]
Maximum input power:	80 W
Impedance:	6 ohms
Dimensions:	Width; 7-7/8" (200 mm)
	Height; 11-13/16" (300 mm)
	Depth; 10" (253 mm)
Weight:	5.9 lbs. (2.7 kg)/each

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

– 2 –

CD-C452/C452C

NAMES OF PARTS

CD-C452/C452C

Front Panel

1.Disc Tray

2.Disc Number Selector Buttons

3.Disc Skip Button

4.Open/Close Button:

5.Disc Number Indicator

6.Timer Indicator

7.Record Indicator

8.Sleep Indicator

9.Extra Bass Indicator: X-BASS 10. (CD/TUNER) 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.Dolby Pro Logic Button

18.QSOUND Button

19.Extra Bass Button: X-BASS

20.Main Volume Up/Down Buttons:

21.Function Selector Buttons

22.Timer/Sleep Button

23.Clock Button

24.Headphone Socket

25.Tuning and Time Up/Down Buttons:

26.Memory/Set Button

27.(TAPE) Record Pause Button:

28.(CD) Track Down/Review Button: (TUNER) Preset Down Button:

29.(CD/TAPE) Stop Button:

30.Virtual Surround Button

31.(TAPE) Play Button:

(CD) Play/Repeat Button:

32. (CD) Track Up/Cue Button:

(TUNER) Preset Up Button:

33.Equalizer Selector/Demo Mode Button

34.(CD) Pause Button

35.(CD) Random Button

36.(CD) Clear Button

37.(TAPE 1) Cassette Compartment

38.(TAPE 2) Cassette Compartment

1

2

3 4

5 6 7 8 9

1 2 3

REC SLEEP X-BASS

13

101112

MEMORY ST

kHz

MHz

14 15

16 17	18 19	20
21
22		35
23		36
24
25
26 27 28 29 30	31 32	33 34

37 38

	Rear Panel		2
1.	AC Power Input Socket
2.	FM/AM Loop Aerial Socket
3.	Video/Auxiliary (Audio Signal) Input Sockets		3
4.	Rear Output Socket
5.	Center Output Socket		4
6.	Speaker Terminals	1
			5
			6

– 3 –

CD-C452/C452C

Speaker Section

Front Speaker

CP-C452

1.Super Tweeter

2.Tweeter

3.Woofer

4.Bass Reflex Duct

5.Speaker Wire

CD-C452/C452C

Remote Control

1.Remote Control Transmitter LED

2.Center Level Buttons:

3.Dolby Pro Logic Button

4.Virtual Surround Button

5.QSOUND Buton

6.Test Tone Button

7.Balance Control Buttons:

8.Surround Level Buttons:

Tuner control section

9. Preset Up/Down Buttons:

CD Control section

10.Disc Skip Button

11.Play/Repeat Button:

12.Memory Button

13.Clear Button

14.Pause Button:

15.Track Down/Review Button:

16.Track Up/Cue Button:

17.Stop Button:

18.Random Button

Left speaker	Right speaker
	1
	2
	3
	4
	5
	1

			2				8
			3
			4				9
	Tape control section		5
	19.	(TAPE 1) Play Button:
	20.	(TAPE 1/2) Stop Button:	6
	21.	(TAPE 2) Play Button:					10
	22.	(TAPE 2) Record Pause Button:	7
	23.	(TAPE 2) Rewind Button:					11
	24.	(TAPE 2) Fast Forward Button:	12
	Common section		13	14 15 16		17	18
	25.	Equalizer Mode Button
	26.	Function Selector Buttons	19 20		21 22
	27.	Power Button
	28.	Extra Bass Button: X-BASS					23
	29.	Volume Up/Down Buttons:	25
							24

26 27 29

28

– 4 –

– 5 –

		MINI COMPONENT		Quick-Guide
		SYSTEM		Guía rápida
Preparation for use
Preparación para su uso
		● AM Loop Antenna
● FM Antenna		● Antena de cuadro de AM
● Antena de FM
ANTENNA	FM
	AM
	LOOP
		Red	SPEAKERS	Red
		Rojo	RIGHT LEFT	Rojo
● AC 120 V, 60 Hz				Black
● 120 V de CA, 60 Hz			RATED SPEAKER IMPEDANCE:
			6 OHMS MIN.	Negro
		Black
		Negro
Turning the power on and off			Sound control
Conexión y desconexión de la alimentación			Control del sonido
			● Volume
POWER			● Volumen
			VOLUME
			UP • • •
				VOLUME
			X-BASS
	POWER
			DOWN •

Remote control

Control remoto

+		● 2 "AA" batteries
-	+	● Dos pilas "AA"
		-
		● Batteries are not
		included.
		● Las pilas no
		están incluidas.

●Equalizer

●Ecualizador

		EQUALIZER
				EQUALIZER
Remote Sensor				MODE
Sensor remote		DEMO
		FLAT	HEAVY-1	HEAVY-2
		SOFT-2	SOFT-1	VOCAL
		● Extra-BASS
8" - 20' (0.2m - 6m)		● Graves extra
0,2m - 6m		VOLUME
		UP • • •		X-BASS
	15
15
		X-BASS
		DOWN •

CD playback

Reproducción de discos compactos

C D	OPEN	OPEN

● Label facing up

● Etiqueta hacia arriba

Tape playback

Reproducción de cintas

TAPE
(1	2)
	TAPE 1	TAPE 2

Radio operation

Funcionamiento de la radio

FM STERO	FM MONO	AM
	ST
TUNER
(BAND)
		TUNING/TIME

Recording from CDs

Grabación de discos compactos

REC PAUSE

C D

TAPE 2
● Load the disc to be recorded.	● CD recording starts.
● Introduzca el disco que va a grabar.	● La grabación de CD empieza.

Precaution

Precaución

● The sound level at a given volume setting	● El nivel de sonido en una posición de volumen
depends on a combination of speaker effi-	fijado depende de una combinación del rendi-
ciency, location and many other factors. It is	miento de las altavoces, la posición y muchos
advisable to avoid exposure to high volume	otros factores. Es aconsejable evitar un aumen-
levels, which occur while turning the unit on	to de volumen. Esto se produce, por ejemplo,
with the volume control setting up high, or	al conectar el aparato con el volumen puesto
while continually listening at high volume le-	en una posición alta. Evite continuar la audición
vels.	prolongada a altos niveles de sonido.
● Only discs bearing the logo as shown can	● En este aparato sólo pueden reproducirse los
be played in this unit.	discos que tengan el logotipo mostrado.

C452/C452C-CD

CD-C452/C452C

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 to 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-C452/C452C

STEP	REMOVAL		PROCEDURE		FIGURE
1	Top Cabinet	1.	Screw .....................	(A1) x4	6-1
2	Side Panel	1.	Screw .....................	(B1) x6	6-1
	(Left/Right)
3	CD Player Unit/	1.	Turn on the power supply,		6-2
	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.	Screw .....................	(C3) x1
		5.	Socket ....................	(C4) x2
4	Back Board	1.	Screw .....................	(D1) x9	6-2
		2.	Socke .....................	(D2) x1
5	Main PWB	1.	Screw .....................	(E1) x1	7-1
		2.	Socket ....................	(E2) x2
		3.	Flat Wire .................	(E3) x1
		4.	Tip Wire ..................	(E4) x1
		5.	Socket ....................	(E5) x1
6	Front Panel	1.	Screw .....................	(F1) x2	7-1
7	Display PWB/	1.	Socket ....................	(G1) x1	7-2
	Switch PWB	2.	Screw .....................	(G2) x11
8	Tape Mechanism	1.	Open the cassette holder.		7-2
		2.	Screw......................	(H1) x5
9	Power Amp. PWB	1.	Screw .....................	(J1) x3	7-3
		2.	Socket ....................	(J2) x2
10	Turntable	1.	Screw .....................	(K1) x1	7-4
		2.	Cover .....................	(K2) x1
11	CD Player Base	1. Screw .....................		(L1) x2	7-4
		2.	Guide .....................	(L2) x2
12	CD Servo PWB	1.	Screw .....................	(M1) x1	7-5
		2.	Socket ....................	(M2) x4
13	CD Changer	1.	Screw .....................	(N1) x4	7-6
	Mechanism
14	CD Mechanism	1.	Screw .....................	(P1) x1	7-6

Note 1:

How to open the changer manually. (Fig. 6-3)

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-C452/C452C

( A1 ) x2	Top Cabinet
ø3 x12mm

				( A1 ) x2
( B1 ) x2				ø3 x12mm
ø3 x8mm
				Side Panel
Side Panel				(Left)
(Right)
( B1 ) x2				( B1 ) x2
ø3 x8mm	Back Board
				ø3 x8mm
		Figure 6-1
		(C2) x1	CD Tray Cover	Hook
				( C1) x3
( C4 ) x2		Pull
			1
A				1
CD Player Unit				2
Back Board				( C2 ) x1
( D2 ) x1				Front Panel
( C3 ) x1			Main PWB
ø3 x8mm

( D1 ) x7

( D1 ) x2

ø3 x8mm

ø3 x10mm

Figure 6-2

< A >

LOCK

LEVER

Figure 6-3

– 6 –

Front Panel

( E4 ) x1

( E2 ) x2

	( E3 ) x1	Push
	Power Amp.		Tape
	PWB
		Push	Mechanism
			( E1 ) x1
			ø3 x10mm
	Main PWB	( F1 ) x2
		ø3 x8mm
		(E5) x1

Figure 7-1

	Switch PWB
	Front Panel
( G2 ) x3
ø3 x10mm		( G1 ) x1
( G2 ) x8		Display
ø3 x10mm		PWB
		Open
( H1 ) x5
ø3 x10mm
	Tape	Cassette
	Mechanism
		Holder
		(Left/Right)
	Figure 7-2

		( J1 ) x3
	Power	ø3 x12mm
		( J2 ) x1
	Transformer
	( J2 ) x1

Power Amp.

PWB

Figure 7-3

CD-C452/C452C

( K1 ) x1 ø3 x10mm

( K2 ) x1

Washer

Turntable

( L1 ) x1	CD Player Base
ø3 x10mm
( L2 ) x1
	( L1 ) x1
	ø3 x10mm
Loading chassis	( L2 ) x1
	Figure 7-4

( M1 ) x1 ø3 x10mm

CD Servo PWB ( M2 ) x2

( M2 ) x2

Loading chassis

Figure 7-5

( N1 ) x4

ø3 x12mm

( P1 ) x1 ø2.6 x10mm

Shift Lever

CD Changer

Mechanism

CD Player Base

CD Mechanism

Be careful 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 7-6

– 7 –

CD-C452/C452C

CP-C452

STEP	REMOVAL		PROCEDURE		FIGURE
1	Front Speaker	1. Net ..........................		(A1) x1	8-1
		2.	Baffle Board ...........	(A2) x1
		3.	Screw .....................	(A3) x2	8-2
		4. Screw .....................		(A4) x4
		5. Screw .....................		(A5) x2

Note:

The center and 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-C452

Tweeter

Baffle Board ( A2 ) x1

Net

( A1 ) x1

Woofer

Screwdriver

Figure 8-1

Super

Tweeter

( A5 ) x2

ø3 x10mm

Tweeter

( A3 ) x2 ø3 x10mm

( A4 ) x4 ø4 x14mm

Woofer

Figure 8-2

– 8 –

CD-C452/C452C

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	EQUALIZER/DEMO	ON—OFF
SW702	VOLUME DOWN	ON—OFF
SW703	X-BASS	ON—OFF
SW704	VOLUME UP	ON—OFF
SW705	OPEN/CLOSE	ON—OFF
SW706	DISC SKIP	ON—OFF
SW707	DISC 1	ON—OFF
SW708	DISC 2	ON—OFF
SW709	DISC 3	ON—OFF
SW710	REC/PAUSE	ON—OFF
SW711	PRESET UP	ON—OFF
SW712	STOP	ON—OFF
SW713	PLAY/REPEAT	ON—OFF
SW714	PRESET DOWN	ON—OFF
SW715	TUNING UP	ON—OFF

REF. NO	DESCRIPTION	POSITION
SW716	TUNING DOWN	ON—OFF
SW717	POWER	ON—OFF
SW718	CLOCK	ON—OFF
SW719	TIMER/SLEEP	ON—OFF
SW720	MEMORY/SET	ON—OFF
SW721	CD	ON—OFF
SW722	TUNER/BAND	ON—OFF
SW723	TAPE	ON—OFF
SW724	VIDEO/AUX	ON—OFF
SW725	PRO LOGIC	ON—OFF
SW726	VIRTUAL	ON—OFF
SW727	Q-SOUND	ON—OFF
SW728	CD PAUSE	ON—OFF
SW729	CD CLEAR	ON—OFF
SW730	RANDOM	ON—OFF
SWM 3	FOOL PROOF	ON—OFF
SWM 4	F.A.S.	ON—OFF
SWM 5	CAM	ON—OFF

FRONT

VIEW

FRONT

VIEW

FRONT

VIEW

E C B

(S) (G)(D)

B C E

(1) (2) (3)

2SA1015 GR

KRC107 M

2SD2012

333YTH2

2SC535

C

KTA1266 GR

KTA1273 Y

2SD468

C

KTA1268 GR

KRA102 M

KTA1271 Y

KRA109 M

KTC3199 GR

KRC102 M

KTC3200 GR

KRC104 M

KTC3203 Y

Figure 9 TYPES OF TRANSISTOR AND LED

– 9 –

CD-C452/C452C

WAVEFORMS OF CD CIRCUIT

STOP PLAY

FOCUS SERCH

	1	5ms
		0.50 V	F.E
		IC1 20
	2	5ms
		5.0 V	DRF
		IC1 54		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
10	50ms
	1.00 V
	SPO
11	50ms
	2.00 V
	CLV+
	PLAY
	TCD-712
12	5s
	100mV
	SLD
	1
12 100mV0.5s
	SLD
	1

– 10 –

11 –	BLOCK 11 Figure
–	DIAGRAM
	(1/3)

PICKUP UNIT

+5V

Q1

+5V

XL1

62

64

45

44

6 23 36 41 43

CNP11

LD0

VCC1

XIN

XOUT

VVDD VDD LVDD

RVDD XVDD

IC2

LCHO 37

16

LVSS 38

TO MAIN SECTION

IC1

LC78623D

RVSS 39

25

35

RCHO 40

( TO IC601 )

LA9241M

9 EFMO SERVO/SIGNAL

JP– 32

1 FIN2

~

10 EFMIN

FOCUS COIL

2 FIN1 SERVO AMP. CV+ 40

12 CLV+

CONTROL

3 E

SLC 43

~

TRACKING COIL

4

F

SL1 44

20 JP–

CONT1 24

1

IC81

6

+B1

RES. CQCK.

TA7291S

TO FD SPO NC SLD

SL– SL+

DRF

DAT CE

CONT2 25

9

LORDING MOTOR

5

CL

COIN SQOUT.

DRIVER

RWC. WRQ

CONT3

3 7

15 16 27 23 29

30 31 54

51 52 53

53 ~ 58

26

CL, DAT, SELIAL CONTROL/CE

Q93

M2

M1

SLED

DISC

SL+. SL–. DRF

10

GND (D)

10

SW2

MOTOR

MOTOR

9

MECHA UP

9

MECHA UP

M

M

5 22 32

8

GND (D)

8

SW3

6

7

DISK NO.

7

DISC No.

20

+B1

6

OPEN/CLOSE

6

SW1

7

IC3

26

5

GND (D)

5

OPEN/CLOSE

12

4

M–

4

M3

27

M LOADING

13

M56748FP

3

M+

3

28

24

DRIVER

29

2

GND (M)

2

Q91

1

1

SOLM1

25

34

30

35

CNP10

CNS10

31

36

PICKUP IN	8 9 10 11
SW4

PU-IN SW			TO DISPLAY
			SECTION
		6	+12V (+B5)
+5V	Q52	5	+7.3V (+B1)
	REGULATOR	CNP11
+7.3V

C452/C452C-CD

CD-C452/C452C

FM&AM LOOP ANT

FM BPF				IC301				FM IF
BF301	1	FM FRONT END					6	T301	CF301
			TA7358AP
	2	3	4			8	9
				5	7
				FM	OSC
		L302		FM RF		L303	FM OSC
						Q302
					OSC BUFF
	AM TRACKING
									AM BAND
									COVERAGE

T302

AM ANT.

FM +B

		+B4			+B4
							VR351
	AM IF					MPX VCO ADJ
		T351				T352			MONO/ST
FM IF IN
						FM DET
1	3		5	6	21	20	13	15
	AM MIX		AM IF	GND FM+B		FM DET	VCO MO/ST
			FM/AM IF					L 9
			IC303				MPX IN	R 10
			LA1805			DET OUT		FM/AM
	24	23	22		7	17	16	11
	INOSCAM	AM+B	INRFAM		STEREO			FM/AM
								SWITCHING
FM OSC								Q343	FM

		X352								VOLTAGE
										REGURATER
	4.5MHz		IN		IN
VT										+B4
			AM		FM	CE		DI CL	DO
	1						4
20		22	15	16	11	3		5	6

		OSC	IC302
			LC72131	17
		PLL CONTROLLER
SWITCHING
	7	10		21
Q344	FM	ST
				ST FM

JK601

CL

2

VIDEO/AUX

L

AUX

L 52

R

R 60

CNS11

TAPE

L 53

R 59

61

TUNER

L 54

R 58

FROM CD SECTION

52

CD

L 55

CNP11

R 57

53

LTIN

PLAYBACK&RECORD/

REC

+B4

PLAYBACK AMP.

Q121

TAPE 1

IC101

Q122

AN7345K

MUTING

OUT-R

OUT-L

L-CH

SWITCHING

R (T1) 24

-LTIN

RT-IN

P.B.

PB HEAD

L (T1) 1

13

+B4

R-CH

Q103

L (T2) 2

L

4

L

P.B

8 18

45 44

23 24

R 21

R

TAPE 2

~

R (T2) 23

Q106

34 CL

REC/PB

L NF 3

5

REC

IC501

HEAD

P.B

R NF 4

20

38 CL

L-CH

POP REDUCE 6

T1/T2

H/N

7 L

REC

LV1035M

R-CH

L REC 9

REC

18 R

35 DATA DOLBY PRO LOGIC

R REC 16

8

L NF

37 DATA

DECORDER

17

R NF

36 ENABLE

9

C-OUT

AC BIAS

REF 14

10

ALC

NOR/

12

HIGH

T1/T2

42

33

21

31

32

15

19

X501

T1/T2

SWITCHING

SWITCHING

Q107

Q111

20 19

18 17 16

Q108

FLOUT FROUT

COUT

RLOUT

42

C-IN

IC401

Q109

Q110

+B4

31

QS7777PF

FLIN 41

SWITCHING

Q-SOUND

FRIN 40

BIAS

SWITCHING

BIAS

6

OCS

Q128

Q124

Q126

BIAS

ERASE

L104

HEAD

Figure 12 BLOCK DIAGRAM (2/3)

– 12 –

CD-C452/C452C

MONO/ST

T

L 9

R 10

M

FM/AM

WITCHING

FM

Q343

OLTAGE

GURATER

+B4

7

ST FM

JK601		CL	DI	CE
		23	24	25		56
VIDEO/AUX
						VDD
L	AUX	L 52
R		R 60
	TAPE	L 53
		R 59
	TUNER	L 54
		R 58
	CD	L 55
		R 57
		48 64			49	63
		LTIN	RTIN

R-OUT	L-OUT
	23 24

OGIC

R

9 C-OUT

31 32

X501

18 17 16

COUT RLOUT		42
		C-IN
	FLIN	41
	FRIN	40

											+B2										UNSWITCH
	FL701																				+B1
	DISPLAY															MEMORY
																BACK UP
1 2	3 ~ 30	31 32 33																								TO CD SECTION
																										TO CD SECTION
		Q701		BIASTAPE		RECTAPE T1/T2 WRQDSPCD RWCDSPCD				CQCKDSPCD COINDSPCD SQOUTDSPCD			RESET RESDSPCD OPEN/CLOSET/TCD					DOWN/DISCUPCDNO	PLSERRUNT2		INPUTCH-L	INPUTCH-R
																										TO POWER SECTION
																										+B5
																										PHM1
			7	8	9	10	11	12	13	14	15	16	17	18	19	20		21	22	23		24
																							25			KEY
		6																					~			SW701
																							27			SW730~
		~								IC701													29	AVDD	VDD
		1																						AVREF	+B2
																							30
		80						IX0224AW
																							33
		~
		72			SYSTEM CONTROL																		34	XL701
		71																					35	4.19MHz
		70				MICROCOMPUTER																	36	CL
		~																					37	DE
		65																					38	DI
		64																					39	DO
		~																					40	DRF		TO CD SECTION
		61
		60	59	58	57	56	55	54	53	52	51	50	49	43	48	47	46	45	44	43		42	41			RESET
	SWM4	Q707~			MECHASTOPTAPE	PLSERUNT1 TAPEFP MUTER D.P.CE VDD MOTORTAPE SOLTAPE							MUTE-F					MUTE-C POWER SL–CD			SL+CD PUINCD				RESET	Q704
		Q709
		LED701~																								Q705
		LED706
	SWM3																									Q706
																									SYSTEM STOP
																										ZD701
	FOOL PROOF
	F. A. S																									TO CD SECTION
	SOLM1	Q705
		Q706
	SOLENOID

SWM5

+B2

3

RX701 1

CAM

2

+B1

+

Q905

–

M901

Q605

M FAN MOTOR

PRESET GRAPHIC EQUALIZER

F-MUTE

IC681

Q603

Q601

NJM4560L

+B4

+B4

Q604

Q602

HEADPHONE AMP.

H/P MUTE

8

Q671 Q672

3

1

JA901

7

41

10

38

8

40

11

37

9

39

12

36

Q673 Q674

5

7

HEADPHONES

+B4

4

OUT

8

IC601

REAR

REAR-OUT

3

1

VOLUME

20

LC75396E

28

5

7

CENTER

AUDIO PROCESSOR

CENTER

IC471

4

OUT

JK601

PRE OUT

NJM4558L

REAR OUT

GRAPHIC EQUALIZER

PRE AMP.

CENTER OUT

VSS

17

R

31

L

26

4

42

5

43

6

44

18 30

Q903

RRIN

CIN

X-BASS

Q901

Q902

FRONT

SO901

R-IN 14

12

10

IC901

FRONT

SPEAKER TERMINAL

L-IN

STK40704

6 L-OUT

+

POWER AMP.

7 R-OUT

–

FRONT SPEAKER

+B

15

–

–B

3

+

1

2

SO801

D801

POWER TRANSFORMER

VOLTAGE

REGULATOR

+B1

+7.3V

Q820

Q822

VOLTAGE

D803 ~ D806

REGULATOR

+B4	+12V (ANALOG)		Q824			AC POWER
			Q825			SUPPLY CORD
			ZD801		D807	T.F
	+12V (MOTOR)		Q823	Q801	~
+B5					D809
						AC 120V/60Hz
			Q826
				VOLTAGE
			VOLTAGE
	+5.6V			REGULATOR
+B2		Q710	REGULATOR

Figure 13 BLOCK DIAGRAM (3/3)

– 13 –

CD-C452/C452C

A

			CNS1B
		K	5
	B	E	4
		A	3
		B	2
		F	1

C
	LD	MON
	K
	E
	B
	LD GND
			5	K
	A		4	E
	F	2200P	3	A
	C		2	B
	LT0H30M1
			1	F
		1M2200P
D		1M	1	TR–
	TR+
			2	TR+
	FO+
			3	FO+
	FO–		4	FO–
			5	GND
	TR–		6	PD
	ACTUATOR
			7	VR
			8	LD

PICKUP UNIT

E

CNS2B

TR– 1

TR+ 2

FO+ 3

FO– 4

GND 5

PD 6

VR 7

LD 8

F

M1	+		CNP3A	CNS3B
DISC	M
MOTOR	–	6		6
M2	+	5		5
		4		4
	M
SLED
MOTOR	–	3		3
SW4		2		2
PICKUP		1		1
IN

G

CD MOTOR PWB-E

R2

+B

+B

1K

C15

C1

47/16

KTA1266 GR

0.01

Q1

C3

1/50

0.33/50

0.47/50

220/6.3

0.1/50

0.01

4.2V

22

C34

C33

C32

0.01

C31

C30

C2

1.5V

4.8V

R1

CNS1A

4.8V

0V

R46 560

2.2V

1V

1V

2.5V

2.5V

4.8V

4.8V

0V

0V

4V

4V

2.4V

0V

48

R45

4.7K C29

4.7/50

VCC1

–4.2V

LDO

BHI

PHI

LF2

VR

REF1

VCC2

FSS

DRF

CE

DAT

CL

CLK

DEF

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

LDS

0V

1

1

K

2.4V

1

FIN2

+

RF

+

C28

–

2 EFBAL

A

REF

–

0.1

2

2

2.4V

2 FIN1

+

REF

TBC

47 2.5V

B

–

FE1

+

3

3

E

2.5V

E

REF

–

+

–

DEF

FOSTA

FSC

46 2.5V

4

4

3

+

REF

–

DGND 45 0V

5

5

F

2.5V

4

F

VCR

+

HFL

TOSTA

CE

R44

C4

REF

–

VCR

2FREQ

REF

SLI

44 2.4V

CNP1

0.1/50

2.4V

TB

+

–

DRF

CL

C26

33K

-+

5

+

LASER

C54 0.001

R9 100K

TE

2.5V

TE

REF

–

VCR

LA9241M

LATOH

3

SLC

C27 0.001

0.033

47K

7

+

47K

R8

IC1

15K

2.5V

6

TE–

–

VCR

FSTA

+

8/12CM

R41

R42

9

C5

REF

+

+

SERVO AMP.SLOF

43

2.5V

R40

C25

R10

–

REF

VCC

R39

0.033

2.5V

–

42 2.4V 5.6K

27P

2.2K

TESI

+

RFS–

1K

8

R11

C6

–

REF

CV–

REF

R43

SCI

+

+ –

6.8K

0.033 2.5V

+

C24

9

+

TGL1

–

CV+

56K

R13 C9

C8

10

THD

REF

–

4 CV+

40

0V

TP1

0.0

–

S.Q.R

JPCLO

470

C7

GL

REF

JP–

RF

41

2.2P

R12

0.1/50

REF

THDL

FSTA

+

RFSM

1.5V HF

R38

C2

100

2.4V

TH

JP

–

JP+

1K

0.047 0.068 2.5V 11

–

JP

FSC

LSOF SLOF

CV–

39 0V

2.5V 12 TD–

GEN+

FE1

–

10

5

SLOF

38 4.8V

+

REF

FOSTA

OR

R14

R15

–

TO

GEN

REF

REF

+

SLOF

HFL

37 0V

27K

12K

C10 2.5V

TD

REF

REF

–

GEN

+

REF

+

+

REF

+

TES

0V

13

+

–

–

36

180P 2.5V

JP

–

–

TOFF

4.8V

14

REF

35

R16

2.5V

TO

+–

+

+

TGL

4.8V

15

–

34

–

3.3K

2.5V 16 FD

FD–

FA

FA–

FE

FE–

AGND

SP

REF

SPG

SP–

SPO

SLEO

REF

SLD

SL–

SL+

JP+

33 0V

8

SPI

JP–

6

33K

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2.5V

2.5V

2.5V

2.4V

2.5V

0V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

12

2.5V

2.2V

2.2V

0V

R17

R22 22K

R21R20

22K1K

R19 1K

R18

R23

10K

C13

330P R26

82K

C16

0.0047

R28 10K

R29 56K

C17 0.001

C20

47/16

C19

1/50

C21

0.0033

7

47K

1.5K

C18 0.47/50

R34

R35

C11

0.1

15K

C14

R30

1

0.01

R27

R31

6.8K

R33 R32

R36

220K

39K

1.2K

1.2K 10K

R24

R25

22K

220K

C12

0.1

R37

C35

82K

1/50

D1

1SS133

1

2.5V

FOCUS/TRACKING/SPIN/SLIDEDRIVER

0V

36

2

2.5V

0V

35

3

0V

0V 34

D3D2 RL104ARL104A

CNS2A

4

2.5V

2.5V

33

0.001

D4

6

2V

1.8V 31

RL104A

5

2.5V

IC3 M56748FP

2.5V

32

C84

1

1

7

2V

1.8V

30

2

2

8

0V

0V 29

3

3

9

0V

0V 28

4

4

10

0V

0V

27

5

5

11

0V

0V

26

6

6

12

2V

2V

25

R48

7

7

13

2V

2V

24

10K

8

8

14

2.5V

2.5V

23

CNP2

15

2.5V

2.5V

22

16

0V

2.5V

21

C36

20

100/16

17

4.7V

4.7V

CNS3A

CNP3

18

0V

0.7V

19

+B

6

6

SP+

SP–

5

5

SL_+

4

4

SL_–

3

3

CD_PUIN

2

2

CD_GND

IN(DSP)CO

1

1

RWC(DSP)

WRQ(DSP)

CNP12

1 2

3

H

• The numbers 1 to 12 are waveform numbers shown in page 10.

• NOTES ON SCHEMATIC DIAGRAM can be found on page 9.

1

2

3

4

5

6

Figure 14 SCHEMATIC DIAGRAM (1/10)

– 14 –

CD-C452/C452C

R57 1K

R61 1K

R62 1K

C44

100P

C45

100P

C47

100P

C48

100P

C49

100P

R63 1K

1K

1K

C38

R60

C46

100P

0.01

1K

C28

R58

R59

+B

0V

0V

0V

2.4V

2.5V

0V

4V 4V 4V

0V 0V

0V

2.4V

0V

2.4V

0V

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

0.1

TEST1

/CS

TEST5

4M

16M

TEST11

/RES

/CQCK

COIN SQOUT

RWC

WRQ FSX

SBCK

SFSY

PW

EFLG 48 2.2V

U-COM

SUB-CODE

SBSY 47 0V

XL1

XVSS 46 0V

R44

0V

1 DEF1

INTERFACE

33K

R51

0V

2

TA1

XIN 45 2.1V

3

X-TAL

R93

3.3M

0V

XOUT

44

2.2V

PDO

GENERATOR

R42

C39

3

2KX8

C53 0.022

220

D82 1SS133

R50

0V

RAM

D81 1SS133

47K

0.047

680

4

VVSS

XVDD 43

C83 0.022

5

1.9V

ISET

4.8V

R39

C40

5

MUTER 42 4.8V

R-CH

1

1K

RVDD 41

4.5V R72

A_GND

0.047

VCO CLOCK

ERROR COERECT

CD_RCH

2

R52

OSC CONTROL

FLAG CONTROL

RCHO 40 2V

2.7K

L-CH

4FS

C74 220P

3

27K 4.8V

6

VVDD

1BIT

RVSS 39 0V

C72

R74

D-GND

CNS11

8

C23

R53

10/50

390

A_GND

4

0V

7 FR

DIGITAL

DAC

C73 220P

+B

7.3V

5

TO MAIN PWB

0

0.0027

1.2K

0V

8

VSS

LVSS 38

0V

R71

R73

M_12V

P16 2-A

SYNC-DETECT

FILTER

6

2.5V

9 EFMO SLICE LEVEL

LCHO 37 2V

2.7K

390

CD_LCH

+B

EFM DEMODULATE

CNP11

2.5V 10 EFMIN

CONTROL

IC2

LVDD 36 4.5V

C71

Q52

0V

11 TEST2

MUTEL 35 4.8V

4.9V

KTC3203 Y

LC78623D

10/50 +B

0V

CLV+

NC 34 0V

6.5V

12

CLV

SERVO/SIGNAL

C43

330/6.3

+5V

5.5V

R66

0V 13

CLV–

220

DIGITAL SERVO

TEST4 33

R55

4.8V

V/P

CONTROL

0V

L61

0V

14

HLF

150

0.82 H

R64

C75

15

SERVO

EXTERNAL

DIGITAL

22

0V

16

TES

COMMAND

OUTPUT

OUT

C50

C51

C52

100/16

ZD61 MTZJ5.6B

0.001

C22

TOFF

PCK FSEQ VDD

CONT1

CONT2

CONT3 CONT4

CONT5

EMPH

DOUT

TEST3

11

TGL

C2F

100/16

JP+

JP–

0.022

220P

4.8V 17

18

19

20

21

22

23

24

25

26

27

28 29

30

31

32

4.8V

0V

0V

2.5V

0V

4.8V

0V

0V

0V

0V

0V

0V

4.8V

2.5V

0V

+B

R88 1K

R89 1K

R90 1K

+B

C57

0.001

C35

1/50

D1

1SS133

C56

+B

0.022

CD_LD_M+

+B

D4

IC81

M–

RL104A

TA7291S

+B

LOADING MOTOR DRIVER

LD

Q91

CD

KTA1271 Y

0V

1

2 3

4

5 6

7 8 9

Q93

12V

R81

12V

SOLM2

0V

6.4V

1V

0V

6.5V

6.5V

6.5V

2.9V

0V

KRC102 M

R87

2.7K

0V

12V

SOLENOID

10K

3

2

R86

D91

LOCK

0V 1

R83

2.2K

R82

1SS133

C82

3.9

47/16

BIM5

3.3K

C81

1 SOL

47/16

1

6

M3 T/T

2 GND(M)

2

5

+

UP/DOWN

3 M+

3

4

R85

M LOADING

4 M–

4

3

–

56

SW1

5 GND(D)

5

2

(1/2W)

OPEN

6 OPEN/CLOSE

6

1

CLOSE

7 DISC NO.

7

SENSOR

8 GND(D)

8

0.022

CD SIGNAL

9 UP/DOWN

9

PWB-F

C37

10 GND(D)

10

CNP10

CNS10

R47

10K

SW2

MECHA UP

RWC(DSP)

WRQ(DSP)

CO IN(DSP)

SQ OUT(DSP) CQ CK(DSP)

DRF (ASP)

OPEN/CLOSE DISC NO.

UP/DOWN

1

1

SW3

RES(DSP)

2

2

PUIN SW

DISC NUMBER

D GND

SLD+

SLD–

CNS5

CD SERVO PWB-C

12

1 2

3

4 5

6

7

8 9

10 11

12 13

14

CNS12

TO DISPLAY PWB

P19 11-A

7

8

9

10

11

12

Figure 15 SCHEMATIC DIAGRAM (2/10)

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