Sony HCD-GRX80, HCD-RXD8, HCD-RXD8S Service manual

HCD-GRX80/RXD8/RXD8S

SERVICE MANUAL

Ver 1.1 2001. 06

HCD-GRX80/RXD8/RXD8S is the
tuner, deck, CD and amplifier section	Photo: HCD-RXD8 (SILVER)
in MHC-GRX80/RXD8/RXD8S.

AEP Model

HCD-RXD8/RXD8S

UK Model

HCD-RXD8

E Model

Australian Model

HCD-GRX80

		Model Name Using Similar Mechanism	HCD-GRX8/R800/RX88/RX99
CD
		CD Mechanism Type	CDM38LH-5BD32L
SECTION
		Base Unit Type	BU-5BD32L
		Optical Pick-up Type	KSS-213D/Q-N
TAPE DECK		Model Name Using Similar Mechanism	HCD-GRX8/R800/RX88/RX99
SECTION
		Tape Transport Mechanism Type	TCM-230AWR1/230PWR1

SPECIFICATIONS

— Continued on next page —

COMPACT DISC DECK RECEIVER

9-928-823-12	Sony Corporation
2001F0200-1	Home Audio Company
© 2001.6	Shinagawa Tec Service Manual Production Group

– 1 –

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Notes on chip component replacement

•Never reuse a disconnected chip component.

•Notice that the minus side of a tantalum capacitor may be damaged by heat.

Flexible Circuit Board Repairing

•Keep the temperature of soldering iron around 270˚C during repairing.

•Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

•Be careful not to apply force on the conductor when soldering or unsoldering.

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

This caution label is located inside the unit.

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINE WITH MARK !ON THE SCHEMATIC DIAGRAMS AND IN

THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

– 2 –

MODEL IDENTIFICATION

— BACK PANEL —

Parts No.

	PARTS No.		MODEL	PRODUCT
				COUNTRY
	4-214-451-0¹		GRX80: E2, AR	MALAYSIA
	4-214-451-1¹		GRX80: EA3	MALAYSIA
	4-214-451-2¹		GRX80: SP	MALAYSIA
	4-214-451-3¹		GRX80: MX	INDONESIA
	4-214-451-4¹		GRX80: MX	MALAYSIA
	4-214-451-5¹		GRX80: AUS	MALAYSIA
	4-214-451-6¹		GRX80: TW	MALAYSIA
	4-214-451-7¹		GRX80: E2	INDONESIA
	4-214-451-8¹		GRX80: EA4, TH	THAILAND
	4-214-451-9¹		GRX80: E3	MALAYSIA
	4-217-515-2¹		GRX80: E3	INDONESIA
	4-217-515-3¹		GRX80: EA3	INDONESIA
	4-215-165-0¹		GRX8: AEP, G, CIS, UK	INDONESIA
	4-215-165-2¹		GRX8S: AEP	INDONESIA
	4-215-165-3¹		GRX8: AEP	MALAYSIA
	• Abbreviation
	G	: German model
	MX	: Mexican model
	SP	: Singapore model
	TW	: Taiwan model
	AUS	: Australian model
	TH	: Thai model
	EA3	: Saudi arabia model
	EA4	: Israel model
	E2	: Without SW tuner E model
	E3	: With SW tuner E model

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts.

The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveform is output four times.

– 3 –

TABLE OF CONTENTS

	1. SERVICING NOTE ..........................................................	5	7-10. Printed Wiring Board – Leaf SW Section – .....................	45
			7-11. Schematic Diagram – Leaf SW Section – ........................	46
	2. GENERAL ..........................................................................	6	7-12. Schematic Diagram – Deck Section – ..............................	47
			7-13. Printed Wiring Board – Deck Section – ...........................	49
	3. DISASSEMBLY		7-14. Printed Wiring Board – Panel Section – ...........................	51
			7-15. Schematic Diagram – Panel (1/3) Section –	53
	3-1. Loading Panel	8
			7-16. Schematic Diagram – Panel (2/3) Section –	55
	3-2. Front Panel	8
			7-17. Schematic Diagram – Panel (3/3) Section –	57
	3-3. Cassette Lid and Tape Mechanism	9
			7-18. Schematic Diagram – CD Motor Section –	59
	3-4. CD SW Board and Panel Board	9
			7-19. Printed Wiring Board – CD Motor Section –	61
	3-5. Disc Tray	10
			7-20. Schematic Diagram – Trans Section –	63
	4. SERVICE MODE	11	7-21. Schematic Diagram – Sub Trans Section – ......................	65
			7-22. Printed Wiring Board – Trans Section –	67
	5. MECHANICAL ADJUSTMENTS	14	7-23. Printed Wiring Board – Sub Trans Section – ...................	68
			7-24. IC Block Diagrams ...........................................................	69
	6. ELECTRICAL ADJUSTMENTS		7-25. IC Pin Functions ...............................................................	70
		14
	7. DIAGRAMS		8. EXPLODED VIEWS
			8-1. Case Section ........................................................................	73
	7-1. Circuit Boards Location ......................................................	18	8-2. Chassis Section ...................................................................	74
	7-2. Block Diagrams		8-3. Front Panel Section .............................................................	75
	• CD Section .......................................................................	19	8-4. CD Mechanism Deck Section-1 (CDM38LH-5BD32L) ....	76
	• Deck Section ....................................................................	21	8-5. CD Mechanism Deck Section-2 (CDM38LH-5BD32L) ....	77
	• Main Section ....................................................................	23	8-6. Base Unit Section (BU-5BD32L) .......................................	78
	• Main Power/Sub Power Section ......................................	25	8-7. TC Mechanism Section-1 (TCM230AWR1/230PWR1) ....	79
	• Display Section ................................................................	27	8-8. TC Mechanism Section-2 (TCM230AWR1/230PWR1) ....	80
	7-3. Printed Wiring Board – BD (CD) Section – .......................	31
	7-4. Schematic Diagram – BD (CD) Section – ..........................	33	9. ELECTRICAL PARTS LIST ........................................	81
	7-5. Printed Wiring Board – Main Section – ..............................	35
	7-6. Schematic Diagram – Main (1/4) Section – ........................	37
	7-7. Schematic Diagram – Main (2/4) Section – ........................	39
	7-8. Schematic Diagram – Main (3/4) Section – ........................	41
	7-9. Schematic Diagram – Main (4/4) Section – ........................	43

– 4 –

SECTION 1

SERVICING NOTE

HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH

TURNS OFF

1 Remove the Case.

3 Pull-out the disc tray.

2 Turn the cam to the direction of arrow.

Note for Installation (ROTARY ENCODER)

BU cam

Note:When attaching the Base unit, Insert the section A into the groove of BU cam.

Section A

Groove

Note:When attaching the BU cam, engage the Rotary encoder switch as shown in the figure.

CD-TEXT

This unit is provided with a simple CD-TEXT display function.

The CD-TEXT contents of 20 tracks are displayed on the fluorescent display tube.

Since the function is simple, some special characters may not be displayed, or may be displayed as other characters.

– 5 –

SECTION 2

GENERAL

Front Panel

1

2

3

4

5

6

7

62

61

60

59

58

57

56 55 54 53 52

51 50 49 48

47 46 45 44

43 42 41 40

39 38 37

36 35 34

33 32

8

9

10

11

12 13 14

19 15 16 17 18

20 21

22

23

24

25

26

27

28

29

30

31

– 6 –

LOCATION OF PARTS AND CONTROLS

1	1/u(Power) button and indicator	18	SYNC BASS button	40	MIC LEVEL knob
2	DEMO (STANDBY) POWER SAVE	19	REC PAUSE/START button and	41	BEAT SPEED button
	button (RXD8/RXD8S)		indicator	42	BEAT SELECT button
	DEMO button (STANDBY) (GRX80)	20	DBFB button	43	BEAT ON/OFF button and indicator
3	DISC 1 button and indicator	21	SURROUND button	44	P FILE MEMORY button
4	DISC 2 button and indicator	22	HI DUB button	45	GEQ CONTROL button
5	DISC 3 button and indicator	23	CD SYNC button	46	FILE SELECT
6	DISC SKIP/EX–CHANGE button	24	VOLUME knob	47	EFECT button
7	§(Eject) button	25	PHONES jack	48	((B deck) button and indicator
8	Disc tray	26	ENTER/NEXT button and indicator	49	9(B deck) button and indicator
9	EDIT DIRECTION/TUNER MEMORY	27	)+ button and indicator	50	((A deck) button and indicator
	button	28	JOG/0x)dial and indicator	51	9(A deck) button and indicator
10	PLAY MODE/DOLBY NR/PTY button	29	GROOVE button and indicator	52	FUNCTION button
	(RXD8/RXD8S)	30	–0button and indicator	53	SYNC BASS H indicator
	PLAY MODE/DOLBY NR button	31	AUTO BPM button and indicator	54	SYNC BASS L indicator
	(GRX80)	32	PAD B button and indicator	55	SYNC EQ indicator
11	REPEAT/STEREO/MONO button	33	PAD A button and indicator	56	EFECT indicator
12	pbutton	34	MIX MIC jack	57	Remote sensor
13	^(CD) button and indicator	35	FLASH button	58	DISPLAY button
14	TUNER/BAND button	36	LOOP button	59	SPECTRUM ANALYZER button
15	NON-STOP button and indicator	37	JAM button and indicator	60	CLOCK/TIME SET button
16	KARAOKE PON/MPX button	38	LEVEL button	61	TIMER SELECT button and indicator
17	SYNC EQ button	39	MIX button	62	Display Window

This section is extracted from instruction manual.

– 7 –

SECTION 3

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

3-1. LOADING PANEL

Claws

3 Loading panel

1 Turn the cam to the direction

of arrow.

2 Pull-out the disc tray.

3-2. FRONT PANEL

9 Flat type wire (CN303)

8 Flat type wire

2 Screw (BVTT3x6) (CN304) Lead wire

6 Screw (BVTT3x6)

Lead wire

0 Front panel

5 Screw

(BVTT3x6)

1 Screw (BVTT3x6)

7 Flat type wire (CN501)

4 Screw (BVTT3x6)

3 Screw (BVTT3x6)

– 8 –

3-3. CASSETTE LID AND TAPE MECHANISM

Portion A

6 Spring

3Cassette holder (R) assembly

4 Cassette holder (L) assembly

2 Release
(Refer to order No. 1)	Portion C
Portion B	1 Release
	Portion A

3-4. CD SW BOARD AND PANEL BOARD

	3 CD SW board	1 Three screws
		(BVTP2.6x8)

4 Knob (Jog)

6 Nut

7 Nut

5 Knob (Vol)

9 Tape mechanism

8Three screws (BVTP2.6x8)

7 Two screws (BVTP2.6x8)

Portion A

5 Spring

Portion C

Portion B

2Three screws (BVTP2.6x8)

8Flat type wire (CN601)

	9 Four screws
	(BVTP2.6x8)
	0 Five screws
	(BVTP2.6x8)
	!¡ Five screws
!™ Panel board	(BVTP2.6x8)

– 9 –

3-5. DISC TRAY

(Perform after removing the front panel.)	Note:When installing the Disc tray, pull around the flat type wire to
	pass through the claw A and claw B, as shown in the figure.
3 Flat type wire	(8 core)

4 Two claws

2 Pull-out the disc tray.

5 Remove the disc tray.

Claw B

Claw A

1Turn the cam the direction of arrow.

– 10 –

SECTION 4

SERVICE MODE

MC Cold Reset

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returningthe set to the customer.

Procedure:

1. Press three buttons p , ENTER/NEXT , and 1/u simultaneously.

2. “COLD RESET” is displayed on the fluorescent display tube and reset is executed.

CD Delivery Mode

• This mode moves the pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1.	Press		1/u	button to turn the set ON.
2.	Press				button and	1/u	button simultaneously.
			LOOP
3.	A message “LOCK” is displayed on the fluorescent indicator tube, and the CD delivery mode is set.

MC Hot Reset

• This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out.

Procedure:

1.	Press three buttons p ,	ENTER/NEXT	, and	DISC 1	simultaneously.
2.	The fluorescent indicator tube becomes blank instantaneously, and the set is reset.

Sled Servo Mode

• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.

Procedure:

1.Press 1/u button to turn the set ON.

2.Press three buttons p , ENTER/NEXT , and § simultaneously.

3.The Sled Servo mode is selected, if “CD” is blanking on the fluorescent indicator tube.

4.With the CD in stop status, When the 0AMS ) knob is rotated in the clockwise direction, the pick-up moves outside. When rotated counterclockwise, it moves inside.

5.To exit from this mode, perform as follows:

1)Move the pick-up to the most inside track.

2)Execute MC cold reset. (Press the three buttons p , ENTER/NEXT , and 1/u button simultaneously.)

Note:

•Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.

•Do not run the sled motor excessively, otherwise the gear can be chipped.

Change-over of AM Tuner Step between 9kHz and 10kHz

• A step of AM channels can be changed over between 9kHz and 10kHz.

Procedure:

1.Press 1/u button to turn the set ON.

2.Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.

3.Press 1/u button to turn the set OFF.

4.Press ENTER/NEXT and 1/u buttons simultaneously, and the display of fluorescent indicator tube changes to “AM 9k STEP” or “AM 10k STEP”, and thus the channel step is changed over.

LED and Fluorescent Indicator Tube All Lit, Key Check Mode

Procedure:

1. Press three buttons p , ENTER/NEXT , and DISC 2 simultaneously.

2.LEDs and fluorescent indicator tube are all turned on. Press DISC 2 button, and the key check mode is activated.

3.	In the key check mode, the fluorescent indicator tube displays “K 0 V0 J0”. Each time a button is pressed, “K”value increases . However,
	once a button is pressed, it is no longer taken into account.
	“J” Value increases like 1, 2, 3 ... if rotating	0AMS )			knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.
	“V” Value increases like 1, 2, 3 ... if rotating			knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.
			VOLUME
4.	To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.

– 11 –

AMS Test Mode

• This mode is used for checking the AMS operations of the tape deck.

JIG

7-819-039-12 Alignment tape, AMS-110A

Procedure:

1.Press the 1/u button to turn the unit ON.

2.Set the tape (AMS-110A).

3.Press the three buttons p , ENTER/NEXT , and DISC 3 button simultaneously.

4.“TEST MODE” is displayed on the fluorescent display tube.

5.Press the FUNCTION button and switch the function to the deck with the tape (AMS-110A).

6.Press the CD SYNC button. “AMS CHECK” is displayed on the fluorescent display tube and the tape is rewound.

7.AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8. “NG” is displayed at other times, and the deck stops.

8.AMS starts in the opposite direction. If the AMS count is 2 at shut down again, “OK” is displayed.

“NG” is displayed at other times.

Note: The p button of CD section will become effective and the aging of CD section will stop sometime, if the buttons described in step 3 are not pressed simultaneously. In that case, press ^ button and operate the CD section.

Aging Mode

During the aging mode, both the CD player and tape deck are executed together.

• If an error occurs:

Aging stops, and the error state is displayed on the fluorescent display tube.

• If no error occurs:

Aging is repeated.

Procedure:

1.Press the 1/u button to turn the unit ON.

2.Load 10 minute tapes with unbent rec-proof tabs in decks A and B.

3.Set CD on the DISC 1 table.

4.Set the CD mode REPEAT to OFF and PLAY MODE to ALL DISCS.

(Press the PLAY MODE/DOLBY NR and REPEAT/STEREO/MONO buttons to set these modes.)

5.Press the FUNCTION button to switch the function to “CD”.

6. Press the three buttons p , ENTER/NEXT , and DISC SKIP/EX-CHANGE button simultaneously.

7.Aging starts.

8.To end aging, press the 1/u button to turn the unit OFF.

Aging Sequence:

Aging is performed in the following sequence.

• Tape Deck

1.The tape in deck A is rewound. “TAPE A AG-1” is displayed.

2.The FWD side of deck A is played for two minutes. “TAPE A AG-2” is displayed.

3.The tape in deck A is fast forwarded. “TAPE A AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape e nd.

4.The RVS side of deck A is played for two minutes. “TAPE A AG-4” is displayed.

5.The tape in deck A is rewound. “TAPE A AG-5” is displayed.

6.The FWD side of deck B is played for two minutes. “TAPE B AG-2” is displayed.

7.The tape in deck B is fast forwarded. “TAPE B AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape e nd.

8.The RVS side of deck B is played for two minutes. “TAPE B AG-4” is displayed.

9.The tape in deck A is rewound. “TAPE A AG-5” is displayed.

10.Repeated from step 2.

• CD

1.The tray rotates.

2.DISC 1 is chucked.

3.The TOC is read.

4.The first track is played for 2 seconds.

5.The last track is played for 2 seconds.

6.Repeated from step 1.

– 12 –

• Display when ended abnormally When the tape deck is abnormal:

The state when ended abnormally is displayed.

The contents of display are the same as that during aging.

When the CD player is abnormal:

A message indicating that errors such as “CD MEC ERR” have occurred.

Check the error contents in the following error history display mode.

Error History Display Mode

Mode which enables the history of error occurring in the CD player to be checked.

Execute this mode after ending the aging mode.

Procedure:

1. Press the 1/u button to turn the unit ON.

2. Press the three buttons p , ENTER/NEXT , and CD SYNC simultaneously.

3.A message such as “EMC@@EDC**” is displayed.

@@ : Number of mechanical errors (Up to three past errors)

**: Number of errors (NO DISC ERROR) which occurs after chucking (Up to three past errors)

4.When checking the history of mechanical errors, press the PLAY MODE/DOLBY NR buttons. When checking errors after chucking, press the REPEAT/STERO/MONO buttons to switch the display.

5.Press the 1/u button to end and turn the unit OFF.

6.To erase the error history, perform COLD reset.

(Press the three buttons p , ENTER/NEXT , and DISC 1 simultaneously.

• Viewing the mechanical error history display					• Viewing the NO DISC ERROR history display
	(Switch the history by pressing the				(Switch the history by pressing the
		PLAY MODE/DOLBY NR		button.)		REPEAT/STERO/MONO			buttons.)
Display					Display
	E@@M**#*$*				E@@D##$$%*
@@ : Error number. 00 is the newest.					@@ : Error number. 00 is the newest
*		: Invalid			##	: Error contents
						01 : Focus error
#		: Loading				02 : GFS error
		D : Stop that is due to a problem of other than mechanism				03 : Setup error
		during CLOSE mode.
		E : Stop that is due to a problem of other than mechanism			$$	: Retries
		during OPEN mode.				00 : NO DISC is determined without attempting chucking
		C : Stop that is due to a problem of other than mechanism					retry
		during CHUCK UP mode.				02 : NO DISC is determined after chucking retry.
		F : Stop that is due to a problem of other than mechanism
		during EX OPEN mode.			% : State when determined as NO DISC
						1	: When stopped
$		: Emerging				2	: At setup
		1 : Stop during CLOSE mode.				3	: At TOC READ
		2 : Stop during CHUCK DOWN mode.				4	: When accessing
		3 : Time limit of EX OPEN mode.				5	: When playing
		5 : Time limit of EX CLOSE mode.				6	: When pausing
						7	: When manual searching (during play)
						8	: When manual searching (during pausing)

* : Invalid

– 13 –

SECTION 5

MECHANICAL ADJUSTMENTS

Precaution

1.Clean the following parts with a denatured alcohol-moistened swab:

record/playback heads	pinch rollers
erase head	rubber belts
capstan	idlers

2.Demagnetize the record/playback head with a head demagnetizer.

3.Do not use a magnetized screwdriver for the adjustments.

4.After the adjustments, apply suitable locking compound to the parts adjusted.

5.The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

	Mode	Torque meter	Meter reading
	FWD	CQ-102C	31 to 71 g • cm
			(0.43 – 0.98 oz • inch)
	FWD	CQ-102C	2 to 6 g • cm
	back tension		(0.02 – 0.08 oz • inch)
	REV	CQ-102RC	31 to 71 g • cm
			(0.43 – 0.98 oz • inch)
	REV	CQ-102RC	2 to 6 g • cm
	back tension		(0.02 – 0.08 oz • inch)
	FF/REW	CQ-201B	71 to 143 g • cm
			(0.98 – 1.99 oz • inch)
	FWD tension	CQ-403A	100 g or more
			(3.53 oz or more)
	REV tension	CQ-403R	100 g or more
			(3.53 oz or more)

SECTION 6

ELECTRICAL ADJUSTMENTS

DECK SECTION		0 dB=0.775V

1.Demagnetize the record/playback head with a head damagnetizer.

2.Do not use a magnetized screwdriver for the adjustments.

3.After the adjustments, apply suitable locking compound to the parts adjusted.

4.The adjustments should be performed with the rated power supply voltage unless otherwise noted.

5.The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)

6.The adjustments should be performed for both L-CH and R-CH.

7.Switches and controls should be set as follows unless otherwise specified.

Tape	Signal	Used for
P-4-A100	10 kHz, –10 dB	Azimuth Adjustment
WS-48B	3 kHz, 0 dB	Tape Speed Adjustment
P-4-L300	315 Hz, 0 dB	Level Adjustment

Record/Playback Head Azimuth Adjustment

(Deck A, Deck B)

Note: Perform this adjustments for both decks.

Procedure:

1. Mode : Playback

test tape
P-4-A100
(10kHz, –10dB)	VIDEO IN	level meter

set	+
	–

2.Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1 dB of peak.

L-CH	output
peak		within
	level
		1 dB		within 1dB
	R-CH
screw	peak
position				screw
		L-CH	R-CH
				position
		peak	peak

– 14 –

3. Mode: Playback

test tape P-4-A100 (10kHz, –10dB)

oscilloscope

MD OUT

set

Waveform of oscilloscope

in phase 45°	90°	135° 180°
good		wrong

4.After the adjustments, apply suitable locking compound to the parts adjusted.

Adjustment Location: Playback Head (Deck A)

Record/Playback/Erase Head (Deck B)

Reverse Foward

Tape Speed Adjustment (Deck A)

Note: Set the test mode using the following method and begin tape speed adjustment.

In the test mode, the speed will switch to double speed or normal speed each time the HI DUB button is pressed.

Procedure:

With the power turned ON, press the p button, ENTER/NEXT button, and DISC 3 button simultaneously.

(The “CD TYPE INDICATOR” on the fluorescent display tube will blink while in the test mode.)

To exit the test mode, press the 1/u button.

1.Insert the WS-48B into deck B.

2.Press the ( button of deck B.

3.Press the HI DUB button and play the tape at double speed.

4.Adjust RV1001 of the LEAF SW board so that the reading of the frequency counter becomes 6000 ± 180 Hz.

5.Press the HI DUB button and play the tape at normal speed.

6.Adjust RV1002 of the LEAF SW board so that the reading of the frequency counter becomes 3000 ± 90 Hz.

Adjustment Location: LEAF SW board

Sample Value of Wow and flutter

W.RMS (JIS) less than 0.3% (test tape: WS-48B)

Playback Level Adjustment (Deck A, Deck B)

Procedure:

Mode: Playback

test tape

P-4-L300 level meter (315Hz, 0dB)

set

MD OUT

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L-CH) and RV401 (R-CH)

so that adjustment within the following adjustment level.

Adjustment level:

CN301 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB) level difference between the channels: within ± 0.5 dB

Adjustment Location: AUDIO board

Adjustment Location

[LEAF SW BOARD]

RV1001(High Speed)

RV1002(Normal Speed)

RV1002 RV1001

– 15 –

Record Bias Adjustment (Deck B)

Procedure:

INTRODUCTION

When set to the test mode performed in Tape Speed Adjustment, when the tape is rewound after recording, the “REC memory mode” which rewinds only the recorded portion and playback is set.

This “REC memory mode” is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO.

(After recording, press the –0 button without stopping will return to the position where recording was started.)

1.Press FUNCTION button to select VIDEO. (This step is not necessary if the above test mode has already been set.)

2.Insert a tape into deck B, press the r REC button, and then press the ( button to start recording.

3.Mode: Record

VIDEO (AUDIO) IN

1)315 Hz } 50 mV (–23.8 dB)

2)10 kHz

AF OSC	blank tape
600 Ω	CS-123
attenuator
	set

4. Mode: Playback

recorded	level meter
position

set

MD OUT

Record Level Adjustment (Deck B)

Procedure:

INTRODUCTION

When set to the test mode performed in Tape Speed Adjustment, when the tape is rewound after recording, the “REC memory mode” which rewinds only the recorded portion and playback is set.

This “REC memory mode” is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO.

(After recording, press the –0 button without stopping will return to the position where recording was started.)

1.Press FUNCTION button to select VIDEO 1. (This step is not necessary if the above test mode has already been set.)

2.Insert a tape into deck B, press the r REC button, and then press the ( button to start recording.

3.Mode: Record

VIDEO (AUDIO) IN 315Hz 50 mV (–23.8 dB)

AF OSC	blank tape
600 Ω	CS-123
attenuator
	set

4. Mode: Playback

recorded	level meter
position

set

MD OUT

5.Confirm playback the signal recorded in step 2 become adjustment level as follows.

If these levels do not adjustment level, adjust the RV341 (L-CH) and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4.

Adjustment level: The playback output of 10 kHz level difference against 315 Hz reference should be ± 1.0 dB.

Adjustment Location: AUDIO board

5.Confirm playback the signal recorded in step 2 become adjustment level as follows.

If these levels do not adjustment level, adjust the RV301 (L-CH) and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.

Adjustment level:

CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)

Adjustment Location: MAIN board

Adjustment Location:			[MAIN BOARD] (Conductor Side)
			Record Level (L CH)
[AUDIO BOARD] (Conductor Side)
			RV301
RV341(Lch),RV441(Rch)	RV311(Lch),RV411(Rch)		43 42
Record Bias	Playback Level (Deck A)		56	29
			1	28 IC301
			14	15
			CN303
RV301 RV401			RV351
			Record Level (R CH)
		RV411
RV441 RV341	RV311

RV301(Lch),RV401(Rch)

Playback Level (Deck B)

– 16 –

CD SECTION

Note:

1.CD Block is basically constructed to operate without adjustment. Therefore, check each item in order given.

2.Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3.Use an oscilloscope with more than 10MΩ impedance.

4.Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

S Curve Check

	oscilloscope
BD board
TP (FE)	+
TP (VC)	–

Procedure :

1.Connect the oscilloscope to test points TP (FE) and TP (VC).

2.Connect TP (FEI) and GND, and TP (AGCCON) and GND of the BD board with lead wires.

3.Press the 1/u button to turn the set ON.

4.With the disc (YEDS-18) loaded, press the ^ button and perform focus search. (Focus search will be performed in the same way even while the disc table is pushed in and out.)

5.Check the symmetry and peak to peak level of the oscilloscope waveform (S curve) at this time.

S-curve waveform

symmetry

A

Within 4 ± 1 Vp-p

B

6. After check, remove the lead wire connected in step 2.

Note: • Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the brightness to obtain best waveform.

RF Level Check

	oscilloscope
BD board
TP (RF)	+
TP (VC)	–

Procedure :

1.Connect oscilloscope to test point TP (RF) and TP (VC) on BD board.

2.Connect TP (AGCCON) and GND of the BD board with lead wires.

3.Press the 1/u button to turn the set ON.

4.Put disc (YEDS-18) in and playback 5track.

5.Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.

6.After check, remove the lead wire connected in step 2.

HCD-GRX80/RXD8/RXD8S

SECTION 7

DIAGRAMS

Note: Clear RF signal waveform means that the shape “ ◊” can be	7-1. CIRCUIT BOARDS LOCATION
clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV

TIME/DIV : 500ns

SUB TRANS board (RXD8/RXD8)

level : 1.45 ± 3 Vp-p

CD SW board

E-F Balance (1 Track Jump) check

oscilloscope

BD board			ENCAPSULATED COMPONENT
			(GRX80:E2.E3,EA3,AR,SP,TW,MX,AUS)
		PANEL board
			TUNER unit
TP (TE)	+
			(GRX80:EA4,TH/RXD8/RXD8S)
TP (VC)	–

Procedure:

1.Connect oscilloscope to test point TP (TE) on BD board.

2.Press the 1/u button to turn the unit ON.

3.Put disc (YEDS-18) in to play the number five track.

4.Press the ^button.

5.Check the level B of the oscilloscope's waveform and the A (DC voltage) of the center of the Traverse waveform.

Confirm the following:

•A/B x 100 = less then ± 22 (%)

•B = 1.3 ± 0.6 Vp-p

TRANS board

	MAIN board	ENCAPSU LATED COMPONENT/TUNER
		unit is supplied as the assembled block.

1 track jump waveform	Center of the waveform

B
A (DC voitage)	MOTOR (TURN) board
0V	CONNECTOR board
Symmetry	BD board
level : 1.3 ± 0.6 Vp-p

Adjustment Location :

SENSOR board

[ BD BOARD ] — SIDE A —

MOTOR (SLIDE) board

TP

(VC)	LEAF SW board

TP (RF)

AUDIO board

TP (AGCCON)

TP (FE)

TP

(TE) TP (FE1)

– 17 –

– 18 –

HCD-GRX80/RXD8/RXD8S

7-2. BLOCK DIAGRAMS

– CD SECTION –

IC381

IC381

1

D.OUT

CD DIGITAL

X101

OUT

OPTICAL PICK-UP BLOCK

OPTICAL

16.9344MHz

FOCUS/TRACKING SERVO.

RF AMP

71

89 • 90

IC101 (1/2)

B+

DOUT

XTAI • XTAO

DETECTOR

K

E

A

1

4

38

PD1

RF O 33

44

RF

LOUT1 86

L-CH

A

D

D

2

39

PD2

DIGITAL SIGNAL PROCESSOR

5

LOCK

19

29

LOCK

LOUT2 93

R-CH

IC103

B

C

C

10

41

F

C.OUT

24

14

CNIN

6

42

E

SENS1

25

15

SEIN

B

DATAO

XLTO

CLKO

SPOD

DATA XLAT CLOK

SCOR

SQSO

SQCK

SENS

XRST

F

SENS2

26

MDP

FOK

15 16 17

27 23

21

10 11 12

75

8

7

9

100

2

FEI

1

FEO

FE O

6

S101

FE M

7

LIMIT

45

TEO

CD CLK

47

TEI

TA M 12

TA O 13

CD DATA

DATA

22

SENS2

XLT

21

CLK 20

SCOR

LD DRIVE

SQ DATA

36 LD

FOK

27

SQ CLK

Q101

SENS

LASER

37

PD

DIODE

XRST

23

XRST

TRACKING

XLAT

C

FOCUS

9

COIL

COIL

MUTE

T+

TABLE

MAIN

15

TRACKING

27

SECTION

16

COIL DRIVE

SENSOR

TRAY SENS

T–

IC702

(Page 23)

FOCUS/TRACKING

2-AXIS

COIL DRIVE

DISC

IC102 (1/2)

DEVICE

SENSOR

DISC SENS

F –

IC703

18

FOCUS

26

Q701

F+

17

COIL DRIVE

ROTARY

ENC 1

ENCODER

ENC 2

S811

ENC 3

SLED/SPINDLE

SLED

TURN

S801

MOTOR DRIVE

SERVO

MOTOR DRIVER

OPEN/CLOSE

OUT-OPEN

IC102 (2/2)

IC101 (2/2)

IC701

DET

M102

M

11

SLED MOTOR

6

16 SL O

SL P 14

M701

M

7

OUT1

IN1

3

TBL.L

•

DRIVE

TURN

2

OUT2

IN2

6

TBL.R

SLED MOTOR

12

MOTOR

SLIDE

MOTOR DRIVER

• R CH: Same as L ch

IC801

M101

13

SPINDLE MOTOR

M801

• SIGNAL PATH

M

3

: CD

SPINDLE

•

DRIVE

4

OUT2

RIN

2

LD IN

SLIDE

M

MOTOR

14

7

FIN

10

LD OUT

: Digital out

09

MOTOR

OUT1

– 19 –

– 20 –

– DECK SECTION –

S1004

S1008

PB A/B

MS OUT

A CrO2

B CrO2

RV311

16

17

19

28

27

26

MAIN SECTION

IC611

PLAYBACK

PB-A/B

A 120/70

B 120/70

LEVEL

MS

L

DECK A

70

A IN

PAS

48

PB OUT

HP101

40

PB L

46

B IN

120

PB HEAD

R CH

DOL

LM ON/ 25

LM ON/OFF

(DECK A)

R

DOLBY NR

OFF

DOLBY NR

NORM/

RV301

IC301

NORM/HIGH

HIGH

18

IC601

PLAYBACK

NR ON/

23

NR ON/OFF

LEVEL

OFF

L

DECK B

RV301

24

REC/PB/PASS

PB

REC/PB HEAD

REC LEVEL

RECOUT

DOLBY

(DECK B)

39

RIN

R

R CH

TYPE B

44

REC L

36

EQOUT

EQIN

38

BIAS SW

BIAS ON/OFF

20

BIAS ON/OFF

RM ON/OFF

22

RM ON/OFF

3

1

C

M

ALC ON/OFF

15

ALC ON/OFF

32 33

IC602

P

R

RELAY

HRPE101

4

REC/PB

CAP MOTOR

CAPM CNT1

RV341

CAPM CNT2

CONTROL

REC

+7.5V

Q336-343

BIAS

Q623

M1

SPEED

SWITCH

CAPSTAN

M

CONTROL

CAP M H / L

Q335

MOTOR

Q1001

	REC BIAS
ERASE BIAS	BIAS OSC
	T621, Q621, 622
ERASE HEAD X
	RV1002	RV1001		REEL
	NORMAL	HIGH
				DETECT	A SHUT
	SPEED	SPEED
				IC1001
				REEL
				DETECT	B SHUT
				IC1002
	• R CH : Same as L ch			S1001 (A PLAY)
			+5V		A PLAY
	• SIGNAL PATH			S1002 (B PLAY)	B PLAY
	: PB (DECK A)
	: PB (DECK B)		S1003		A HALF
	: REC (DECK B)		(A HALF)	+5V
				+5V
			S1005
			(REC A)
09			S1006		B HALF/REC A/REC B
			(B HALF)

			S1009
			(REC B)
	• PLUNGER SOLENOID is supplied	MAIN SECTION
	as the MECHANICAL BLOCK ASSY.
	A DECK/	TRIGGER	B TRIG
		MOTOR
	B DECK
		CONTROL
	PLUNGER		A TRIG
		Q331-334

HCD-GRX80/RXD8/RXD8S

B

MAIN

SECTION

(Page 23)

– 21 –

– 22 –

HCD-GRX80/RXD8/RXD8S

GRX80:EA3

ECHO PROCESSOR

– MAIN SECTION –

IC711

2

LPF 1 IN

LPF 2 OUT

9

RV712

ECHO

MIC

J711

LEVEL

LEVEL

MIX

R-CH

MIC

(Page 28)

IC712(1/2)

IC712(2/2)

SPE SIG

E

DISPLAY

IC181(1/2)

IC181(2/2)

WAKE UP

SECTION

STANDBY LED

MUTE

F

DJ-SIG

IIC DATA

DISPLAY

Q181

IIC CLK

SECTION

DJ-MUTE

EQ

VOLUME

(Page 27)

TIMER LED

GRX80:EA3

2

IC101(1/2)

IC101(2/2)

RESET

J101

30

VIDEO/IN

EQ

42

Lch

41

36 Lch

(AUDIO)

68

V

AMP

FRONT

L

69

MD

MUTE

SELECT

MD IN L

66

TC

Q113

SWITCH

58

J191

67

TU

65

CD

R-CH

57

72

MUTE

SUPER

Q191

WOOFER

MD/VIDEO

(AUDIO)

MICON

38 39

37

OUT L

INTERFACE

34 33

32

Q201

1

2

3

DBFB

PB L

DBFB

SWITCH

REC L

Q111,112

RELAY

100

TC RELAY

BASS FRQ.

44

A SHUT

91

A SHUT

B SHUT

90

B SHUT

DBFB H/L

7

MUTE SW

MUTE

B HALF/REC A/REC B

89

B HALF

LINE MUTE

6

Q509

Q192

A HALF

88

A HALF

F RELAY

B

A PLAY

87

A PLAY SW

F RELAY

3

B PLAY

86

B PLAY SW

PB A / B

84

PB A/B

WAKE UP

18

NORM/HIGH

83

EQ H//N

ST-BY LED/CLOCK OUT

39

DECK

BIAS ON/OFF

82

BIAS

SECTION

RM ON/OFF

81

REC MUTE

IIC DATA

30

(Page 22)

NR ON/OFF

80

NR ON/OFF

IIC CLK

29

REC/PB PASS

79

R/PB PASS

CAPM CNT1

75

CAPM CNT1

TIMER LED

26

CAPM CNT2

74

CAPM CNT2

RESET

12

85

ALC ON/OFF

ALC

RESET

LM ON/OFF

78

TC MUTE

MUTE SW

D

SWITCH

CAP M H/L

76

CAP M H/L

Q508

Q501

A TRG

73

A TRG

AC CUT

B TRG

72

B TRG

22

POWER

MS OUT

77

AMS IN

MASTER CONTROL

(CHECK)

1

3

SECTION

ST L

38

493-LAT

IC501

2

RESET

(Page 25)

RDS DATA

47

493-DATA

3

IC502

RDS INT

48

493-CLK

1

FM/AM TUNER

ST-DOUT

54

ST DIN

ST-DIN

TUNER UNIT IS

D503

SUPPLED AS THE

STEREO

50

STEREO

ASSEMBLED

TUNED

51

TUNED

BLOCK

+5.6V

ST CE

52

ST CE

X-OUT

13

ST-MUTE

49

ST MUTE

X613

ST-CLK

53

ST DOUT

X-IN

15

16MHz

L CH

55

ST CLK

TBL. L

63

TBL L

TBL. R

65

TBL R

XC-IN

10

X601

SCOR

19

SCOR

TRAY SENS

61

T SENS

XC-OUT

11

32.768KHz

• R CH: Same as L ch

HOLD

57

HOLD

• SIGNAL PATH

SENS

56

SENS

C

RY-SW

36

RY-SW

: FM

X RST

59

XRST

CD CLK

37

CD CLK

: CD

CD DATA

35

CD DATA

POWER

2

POWER ON/OFF

: PB

CD

DISC SENS

60

DISC SENS

SECTION

SQ CLK

33

SQ CLK

CD POWER

5

CD POWER

: REC

(Page 20)

SQ DATA

32

SQ DATA

: VIDEO/MD

X LAT

58

XLT

• Abbreviation

OUT-OPEN

71

OUT OPEN

FL SW

42

FL SW ON/OFF

ENC-1

70

ENC1

STBY RELAY

43

STANDBY RELAY

EA3 : Saudi Arabia model.

ENC-2

69

ENC2/DISC-LED

ON/OFF

ENC-3

68

ENC3/UP-SW

STK MUTE

1

STK MUTE

LD IN

67

LOAD IN

LD OUT

66

LOAD OUT

09

22

RDS DATA

RXD8,

PROTECTOR

27

PROTECTOR

21

RDS INT

RXD8S

– 23 –

– 24 –

HCD-GRX80/RXD8/RXD8S

– MAIN POWER/SUB POWER SECTION –

TM402

F RELAY

SURROUND

• R CH : Same as L ch

SPEAKER

• SIGNAL PATH

THERMAL

: FM

DET

• Abbreviation

POWER AMP

Q831, 832

RXD8,RXD8S

IC801

THP831

E2 : Without SW tuner E model.

FAN MOTOR

M901

Lch

RY401

M

E3

: Without SW tuner E model.

FRONT

18

14

DRIVER

UNREG

FAN

EA3

: Saudi Arabia model.

16

RELAY

Q401, 402

MOTOR

VH+

–7V

Rch

SP

: Singapore model.

DRIVE

Q435, 436, 431

MY

: Malaysia model.

VH+ SUPP

VH+

HK

: Hong Kong model.

Q803, 881

OVER LOAD

FRONT

TM401

SWITCH

TW

: Taiwan model.

DET

FRONT

Q801

Q437

AR

:Argentine model.

MUTE

SPEAKER

SWITCH

Q804

Rch

Rch

J701

PHONES

DBFB

PROTECT

MUTE

CONTROL

Rch

SWITCH

Q432 - 434

Q439

Rch

MUTE

STK MUTE

SWITCH

Q412, 411

RY-SW

PROTECTOR

RXD8,RXD8S

D

T951

T11

POWER TRANSFORMER

SUB TRANSFORMER

D+5V UNSW

RECTIFIER

JW51

+VH

RECT

SUB TRANS. D+5.6V

3

IC11

1

RECT

AC1

D507

–VH

D831

5.6V REG

D12-15

MAIN

AC2

RECTIFIER

SECTION

+5.6V (STBY)

RDS D+5V UN SW

+VL

RECT

(Page 24)

D922

AC2

–VL

D832

-26V REG

RECT

RECTIFIER

AC1

VG

+5V (STBY)

+5V (LED)

Q12, 13

D17-20

D924

(DISPLAY)

D509

(DISPLAY)

DISPLAY

+5V OUT

IC902

VF

D+5V

3

1

(VIA POWER)

Q905

REG

COM MON

AC

SWITCH

VF

VF BUFF

Q904

A+7V

+7V REG

Q14, 15

IN

Q901,902,913

POWER ON/OFF

SWITCH

Q923, 903

GRX80:E2,E3,EA3,SP,AR,TW

AC3

CD D+5V (SW)

+5V REG

RECTIFIER

RECT

VOLTAGE

SWITCH

RELAY DRIVE

Q907

D925

–7V REG

D901-904

SELECTOR

Q11

CD A+5V (SW)

A–7V

AC3

Q16, 17

Q11

S951

RY11

+5V OUT

IC904 1

Q951,952,914

3

AC4

Q911

REG

SWITCH

SWITCH

CD MOTOR +7V

3

IC901

1

RECT

D907-910

AC4

Q908

Q912

+7V REG

TC MOTOR +12V

AC

CD POWER

+10V REG

VF

IN

3

IC903

1

ST+10V

GRX80

Q909

+12V REG

VF

FL SW ON/OFF

STANDBY RELAY ON/OFF

09

– 25 –

– 26 –

HCD-GRX80/RXD8/RXD8S

– DISPLAY SECTION –
									D637	RIGHT
									LED SWITCH	+5V (LED)
									Q607
				GRADATION L	15				LED SWITCH
									Q608
									D638	LEFT
							IC604
								1
								|
								5
								•
				L/P SCK	3	13		7		Q601,602
							LED	|
				LED LA	4			11	PANEL LED	+5V (LED)
							SWITCH
				L/P DAT	5	15		•
								17
IIC DATA	78	I2C DATA						•
IIC CLK	79	I2C CLK						19
								|
								23
									LED
				L SEL	7				CONTROL
									Q603
				SIRCS	1				REMOTE
			DISPLAY CONTROL	S LOW (F01)	16				CONTROL
RESET	73	RESET	IC601						RECEIVER
				BPF1 (F02)	17
									IC602
				BPF2	18
				BPF3	19
				BPF4	20				S601
				ALL B (L+R)	21				(JOG)
				JOG A	2				ROTARY
				JOG B	8				ENCODER
	72 XOUT			KEY 0	11				KEY
									MATRIX
	X601			KEY 3	14
	12.5MHz
	70 XIN										MUTE
					75
				Busy for PAD							SWITCH
											Q851
WAKE UP	22	GRADATION R/WAKE UP		PAD LA	6					SOUND MIX
				CH for PAD	74						IC605
				VOL A	9					15 SD
							ROTARY			14 SI
E				VOL B	10		ENCODER			8 ST	A.OUT 23
							S602			16 CH
		SEG1-SEG22	GR2-GR12	GR1, GR13-GR18
							VOLUME
MAIN		46 - 67	33 - 40, 42 - 44	27 - 32, 45						20 BUSY
SECTION										XT	XT
(Page 24)				IND BUFF						2	3
				Q610-616

						X602
			FL601			4.09MHz
	VF					VF
			FLUORESCENT INDICATOR TUBE
			SPEANA BPF FILTER
			IC603
			F01	17	S LOW
			F02	16	BPF1
SPE SIG	4	LINE IN	F04	14	BPF2
	6	REC IN	F05	13	BPF3
			F06	12	BPF4
			L+R	11	ALLB

STANDBY LED

D804

ECO

TIMER LED		LED SWITCH		+5V (LED)
		Q605

D635

TIMER SELECT

09

DJ MUTE

F

	MAIN
DJ SIG	SECTION

(Page 23)

– 27 –

– 28 –