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Service Manual

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MHC-GRX8/R800/RX88/RX99www.DataSheet4U.com
HCR-GRX8/R800/RX99
SERVICE MANUAL
AEP Model
UK Model
• MHC-GRX8/R800/RX88/RX99 is composed of following
models.
As for the service manual, it is issued for each component
model, then, please refer to it.
COMPONENT MODEL NAME FOR MHC-GRX8/R800/RX88/RX99
MHC-GRX8 MHC-R800 MHC-RX88 MHC-RX99
MHC-RX88/RX99
E Model
MHC-GRX8/R800
Australian Model
MHC-GRX8
COMPACT DISC DECK
RECEIVER SYSTEM
HCD-GRX8 HCD-R800 HCD-RX88 HCD-RX99
FRONT SPEAKER SYSTEM
SS-GRX8 SS-R800 SS-RX88 SS-RX99
SURROUND SPEAKER SYSTEM
SS-SR110
SS-SR110
HCR-GRX8 is composed of HCD-GRX8 and SS-SR110
HCR-R800 is composed of HCD-R800 and SS-SR110
HCD-RX99 is composed of HCD-RX99 and SS-SR110
• Abbreviation
G : German model
EE : East European model
SP : Singapore model
MY : Malaysia model
MX : Mexican model
AR : Argentine model
EA3 : Saudi Arabia model
HK : Hong kong model
TW : Taiwan model
TH : Thai model
SPECIFICATIONS
General
Power requirements
European models:
Other models:
Power consumption
MHC-GRX8/R800:
MHC-RX88/RX99:
230 V AC, 50/60 Hz
120 V, 220 V or 230 - 240 V AC, 50/60 Hz.
Adjustable with the voltage selector
270 watts
240 watts
Supplied accessories
AM loop antenna (1)
Remote RM-SR8
Batteries (2)
FM lead antenna (1)
Speaker cords (4)
Front speaker pads (8)
Design and specifications are subject to change without notice.
PARTS LIST
R––ef.No. PartNo.
Description
R––em––ark
ACCESSORIES & PACKING MATERIALS
********************************
1-475-571-11 COMMANDER, STANDARD (RM-SR8)
1-501-374-11 ANTENNA, LOOP
1-501-659-41 ANTENNA (FM) (GRX8/R800)
1-501-804-11 ANTENNA (FM) (RX88/RX99)
1-769-317-11 CORD, SPEAKER (2.5m) (FRONT SPEAKER)
1-769-433-11 CORD, SPEAKER(10m) (SURROUND SPEAKER)
3-862-011-11 MANUAL, INSTRUCTION (ENGLISH)
(EXCEPT G, TH)
3-862-011-21 MANUAL, INSTRUCTION (FRENCH, SPANISH)
(AEP, E, SP, MY, MX, AR, EA3)
3-862-011-31 MANUAL, INSTRUCTION (CHINESE)
(E, SP, MY, HK, TW)
3-862-011-41 MANUAL, INSTRUCTION (ARABIC) (EA3)
3-862-011-51 MANUAL, INSTRUCTION (GERMAN) (AEP, G)
R––ef.No. P––artNo.
Description
R––emark
3-862-011-61 MANUAL, INSTRUCTION
(DUTCH, ITALIAN, PORTUGUESE) (AEP)
3-862-011-71 MANUAL, INSTRUCTION
(DANISH, FINNISH, SWEDISH) (AEP)
3-862-011-81 MANUAL, INSTRUCTION (POLISH, RUSSIAN)
(AEP, EE, CIS)
3-862-012-11 MANUAL, INSTRUCTION (HUNGARIAN)
(AEP,EE,CIS)
3-862-012-21 MANUAL, INSTRUCTION (CZECH) (AEP)
3-862-012-31 MANUAL, INSTRUCTION (GREEK) (AEP)
3-862-012-41 MANUAL, INSTRUCTION (TURKISH) (AEP)
3-862-015-31 MANUAL, INSTRUCTION (ENGLISH, THAI) (TH)
3-862-818-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH,
GERMAN, SWEDISH, RUSSIAN)
(For SS-RX88/RX99)
4-991-151-21 COVER, BATTERY (FOR RM-SR8)
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
9-922-784-11
Sony Corporation
Home A&V Products Company
98B001671-1
Printed in Japan ©1998.2
Published by General Engineering Dept.
(Shibaura)


RX88 (Sony)
Service Manual

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SERVICE MANUAL
HCD-GRX8/R800/
RX88/RX99
AEP Model
UK Model
HCD-RX88/RX99
E Model
HCD-GRX8/R800
Australian Model
HCD-GRX8
HCD-GRX8/R800/RX88/RX99 is the
tuner, deck, CD and amplifier section in
MHC-GRX8/R800/RX88/RX99.
Photo: HCD-GRX8
CD
SECTION
TAPE
DECK
SECTION
Model Name Using Similar Mechanism
CD Mechanism Type
Base Unit Type
Optical Pick-up Type
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
SPECIFICATIONS
HCD-H991AV
CDM38L-5BD29AL/
CDM38LH-5BD29AL
BU-5BD29AL
KSS-213D/Q-NP
NEW
TCM-230AWR1/230PWR1
MICROFILM
— Continued on next page —
COMPACT DISC DECK RECEIVER
–1–


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CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation 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 PROD-
UCT 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–


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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
repain 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 pick-
up block. Therefore, when checking the laser diode emission, ob-
serve 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 three times.
MODEL IDENTIFICATION
— BACK PANEL —
Parts No.
• Abbreviation
G : German model
EE : East European model
MX : Mexican model
HK : Hong Kong model
SP : Singapore model
MY : Malaysia model
TW : Taiwan model
AUS : Australian model
AR : Argentine model
TH : Thailand model
EA3 : Saudi arabia model
EA4 : Israel model
E2 : Without SW tuner E model.
E3 : With SW tuner E model.
PARTS No.
4-996-817-0
4-996-817-1
4-996-817-2
4-996-817-3
4-996-817-4
4-996-817-5
4-996-817-6
4-996-818-0
4-996-818-1
4-996-818-2
4-996-818-3
4-996-818-4
4-996-818-5
4-997-818-8
4-997-818-9
4-997-720-0
4-997-720-1
4-997-720-2
4-997-720-3
4-997-720-4
4-997-720-5
4-997-720-6
4-997-720-8
4-997-720-9
MODEL
RX99: AEP, UK, G
RX99: EE, CIS
RX99: AEP, UK, G
RX99: EE, CIS
RX88
RX88
GRX8: TH, EA4
GRX8: E2, E3
GRX8: SP, MY
GRX8: TW
GRX8: HK
GRX8: AUS
GRX8: MX
R800: MX
R800: AR
GRX8: E2, E3
GRX8: SP, MY
GRX8: TW
GRX8: HK
GRX8: AUS
GRX8: MX
GRX8: EA3
R800: MX
R800: AR
PRODUCT
COUNTRY
MALAYSIA
MALAYSIA
INDONESIA
INDONESIA
MALAYSIA
INDONESIA
THAILAND
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
MALAYSIA
MALAYSIA
MALAYSIA
MALAYSIA
MALAYSIA
MALAYSIA
MALAYSIA
MALAYSIA
MALAYSIA
–3–


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TABLE OF CONTENTS
1. SERVICING NOTE .......................................................... 5
2. GENERAL .......................................................................... 6
3. DISASSEMBLY
3-1. Loading Panel ....................................................................... 8
3-2. Front Panel ........................................................................... 8
3-3. Cassette Mechanism Deck .................................................... 9
3-4. Panel Board and Cont Com Board ........................................ 9
3-5. Disc Tray ........................................................................... 10
4. SERVICE MODE ............................................................ 11
8. EXPLODED VIEWS
8-1. Case Section ........................................................................ 98
8-2. Chassis Section ................................................................. 100
8-3. Front Panel Section ........................................................... 101
8-4. CD Mechanism Deck Section-1 (CDM38L-5BD29AL) .. 102
8-5. CD Mechanism Deck Section-2 (CDM38L-5BD29AL) .. 103
8-6. Base Unit Section (BU-5BD29AL) .................................. 104
8-7. TC Mechanism Section 1 (TCM230AWR1) .................... 105
8-8. TC Mechanism Section 2 (TCM230AWR2) .................... 106
9. ELECTRICAL PARTS LIST ...................................... 107
5. MECHANICAL ADJUSTMENTS .......................... 14
6. ELECTRICAL ADJUSTMENTS ............................... 14
7. DIAGRAMS
7-1. Circuit Boards Location ...................................................... 20
7-2. Brock Diagrams
• Tuner Section (AEP, UK, German model) ....................... 21
• Tuner Section (East European, CIS model) ..................... 23
• CD Section ....................................................................... 25
• Deck Section .................................................................... 27
• Main Section .................................................................... 29
• Power Section .................................................................. 31
• Display Section ................................................................ 33
7-3. Printed Wiring Board — CD Section — ............................. 37
7-4. Schematic Diagram — CD Section — ............................... 39
7-5. Schematic Diagram
—Tuner (AEP, UK, German model) Section — ................. 41
7-6. Printed Wiring Board
—Tuner (AEP, UK, German model) Section — ................. 43
7-7. Printed Wiring Board
—Tuner (East European, CIS model) Section — ............... 44
7-8. Schematic Diagram
—Tuner (East European, CIS model) Section — ............... 45
7-9. Schematic Diagram — Deck Section — ............................. 47
7-10. Printed Wiring Board — Deck Section — ....................... 49
7-11. Printed Wiring Board — Main Section — ....................... 51
7-12. Schematic Diagram — Main (1/4) Section — ................. 53
7-13. Schematic Diagram — Main (2/4) Section — ................. 55
7-14. Schematic Diagram — Main (3/4) Section — ................. 57
7-15. Schematic Diagram — Main (4/4) Section — ................. 59
7-16. Printed Wiring Board — Mic/HP Section — ................... 61
7-17. Schematic Diagram — Mic/HP Section — ...................... 62
7-18. Printed Wiring Board — Power Section — ..................... 63
7-19. Schematic Diagram — Power Section — ........................ 65
7-20. Schematic Diagram — Transformer Section — ............... 67
7-21. Printed Wiring Board — Transformer Section — ............ 69
7-22. Printed Wiring Board — Leaf SW Section — ................. 70
7-23. Schematic Diagram — Leaf SW Section — .................... 70
7-24. Printed Wiring Board — Display Section — ................... 71
7-25. Schematic Diagram — Display Section — ...................... 73
7-26. Schematic Diagram — Panel Section — ......................... 75
7-27. Printed Wiring Board — Panel Section — ....................... 77
7-28. Schematic Diagram — CD Motor Section — .................. 79
7-29. Printed Wiring Board — CD Motor Section — ............... 81
7-30. IC Block Diagrams ........................................................... 83
7-31. IC Pin Functions ............................................................... 88
–4–


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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.
Groove
Section A
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.
–5–


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Front Panel
1
SECTION 2
GENERAL
234
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
39 38 37 36 35 34 33 32 31 30 29
28
40
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
–6–


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LOCATION OF PARTS AND CONTROLS
1 1/u button
2 DISC 1 button
3 DISC 2 button
4 DISC 3 button
5 DISC SKIP/EX-CHANGE button
6 § button
7 FUNCTION button
8 Deck A ª button
9 Deck A · button
10 Deck B ª button
11 Deck B · button
12 CD ·∏ button
13 PLAY MODE/DOLBY NR/TUNER MEMORY button
14 EDIT/DIRECTION button
15 REPEAT/STEREO/MONO button
16 TUNER/BAND button
17 p button
18 MUTING button (RX88)
SONIC FORMATION button (GRX8/RX99/R800)
19 SURROUND button
20 KARAOKE PON/MPX button
21 PTY button (AEP, UK model)
22 r REC button
23 P PAUSE button
24 HI-PUB button
25 CD SYNC button
26 VOLUME knob
27 PHONES jack
28 GROOVE button
29 DBFB button
30 )/+ button
31 ENTER/NEXT button
32 JOG button
33 AUTO BPM
34 0/– button
35 BEAT LEVEL button
36 JAM button
37 SPEED button
38 SELECT button
39 ON/OFF button
40 ECHO LEVEL knob (Saudi Arabia model)
41 MIX MIC jack
42 MIC LEVEL knob
43 PAD A button
44 PAD B button
45 NON STOP button
46 FLASH button
47 LOOP button
48 FILE SELECT button
49 EFFECT button
50 GEQ CONTROL button
51 P FILE MEMORY button
52 DISPLAY button
53 DEMO button
54 CLOCK/TIMER SET button
55 TIMER/SELECT button
–7–


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SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. LOADING PANEL
3 Loading panel
Claws
2 Pull-out the disc tray.
1 Turn the cam to the direction
of arrow.
3-2. FRONT PANEL
3 Screw
(BVTP3x8)
6 Flat type wire
7 Flat type wire (CN107)
(CN106)
8 Flat type wire
(CN101)
4 Connector
(CN203)
9 Front panel assembly
2 Screw
(BVTP3x8)
5 Connector
(CN752)
1 Three screws
(BVTP3x8)
–8–


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3-3. CASSETTE MECHANISM DECK
6 Remove the cassette lids.
7 Spring
!∞ Mechanism deck
Two screws
(BVTP 2.6x8)
2 Two screws
(BVTT 2x5)
9 Three screws
(BVTP 2.6x8)
4 Small damper
Three screws
(BVTP 2.6x8)
!™ Screw
(BVTP 2.6x8)
3 Small damper
1 Two screws
(BVTT 2x5)
Bracket
Screw
(BVTP 2.6x8)
5 Push the cassette lids.
8 Spring
3-4. PANEL BOARD AND CONT COM BOARD
4 Shield
1 Ten screws
(BVTP 2.6x8)
7 Nut
6 Konb(Jog)
8 Konb(Volume)
9 Nut
2 Three screws
(BVTP 2.6x8)
!™ CONT COM board
5 Flat type wire
(CN602)
3 Panel board
–9–
Four screws
(BVTP 2.6x8)
Six screws
(BVTP 2.6x8)


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3-5. DISC TRAY
(Perfom after removing the front panel.)
3 Flat type wire (8 core)
Note: When installing the Disc tray, pull around the flat type wire to
pass through the clawA and clawB, as shown in the figure.
4 Two claws
2 Pull-out the disc tray.
5 Remove the disc tray.
1 Turn the cam the
direction of arrow.
ClawA
ClawB
– 10 –


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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 returning the set to the
customer.
Procedure:
1. Press three buttons p , ENTER/NEXT , and 1/u simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously, and the set is reset.
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 LOOP button and 1/u button simultaneously.
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. Select the function “CD”.
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, press ) + utton move the pick-up to outside track, or – 0 button to inside track.
5. To exit from this mode, perform as follows:
1) Move the pick-up to the most inside track.
2) Press three buttons in the same manner as step 2.
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 1 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 JOG knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.
“V” Value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.
4. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.
– 11 –


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Aging Mode
This mode can be used for checking the operations of the CD player and tape deck.
• When problems occur;
Aging stops, and the stopped state is displayed on the fluorescent display tube.
• When no problems;
Aging continues.
Preparations:
• Set the CD on the DISC1 tray.
• Insert a commercially available tape for recording (tapes which contents can be erased, etc.) in decks A and B.
Setting the aging mode:
Press the p button, ENTER/NEXT button, and DISC SKIP/EX-CHANGE button together.
When the aging mode is set, the CD roulette mark blinks. To exit the mode, press the 1/u button and turn OFF the power.
Sequence:
The aging mode is executed in the following sequence.
If the function is set to “CD” when the aging mode is set, aging is performed starting from the CD player. When set to “TAPE A” or “TAPE
B”, aging is started from deck A.
If the function is set to others, aging will not be started until the function is switched to CD or TAPE.
Aging of CD player (12 minutes)
Aging of deck A
Aging of deck B
Maximum about 12 minutes
Display of status:
• The aging status is displayed on the fluorescent display tube.
• Normally, the CD player displays the remaining aging time. But if operations ended abnormally, it displays the cause.
• During the aging of the tape deck, the operations performed will be displayed. If operations ended abnormally, this will be displayed at the
fluorescent display tube.
CD Player
• During normal operations:
Display of fluorescent display tube
**1-@@
**: Displays “CD” and the remaining aging time (minutes) alternately. The remaining aging time is counted down from 12.
@@: Track number being accessed.
• When operations end abnormally:
Display of fluorescent display tube
Display
NO DISC ERR
FOCUS1 ERR
FOCUS2 ERR
GFS ERR
FBIAS ERR
SENSOR ERR
TABLE ERR
TRAY ERR
Main Cause
DISC 1 is NO DISC from the beginning
Focus is not imposed properly
The focus deviated several times after the disc rotated normally
GFS ERROR
Error during focus bias adjustment
DISC 1 was found to be NO DISC by the disc sensor
The table did not rotate normally
The tray containing the BD did not operate normally
– 12 –


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Tape Deck
Display of Operations
TAPE A AG-1
TAPE A AG-2
TAPE A AG-3
TAPE A AG-4
TAPE A AG-5
TAPE B AG-1
TAPE B AG-2
TAPE B AG-3
TAPE B AG-4
TAPE B AG-5
Operation
TAPE A REW
TAPE A FWD
TAPE A FF
TAPE A REV
TAPE A REW
TAPE B REW
TAPE B FWD
TAPE B FF
TAPE B REV
TAPE B REW
Timing of Ending
Shutoff
2 minute playback
20 seconds or shutoff
2 minutes playback
Shutoff
Shutoff
2 minute playback
20 seconds or shutoff
2 minute playback
Shutoff
Operations during aging
• Operations are performed in the following sequence during aging
<CD player>
1. The CD tray rotates and disc 1 is selected.
2. Chucking is performed.
3. TOC is read.
4. Track 1 played back for 2 seconds.
5. The last track is played back for 2 seconds.
6. 1 to 5 is repeated.
7. After 12 minutes of aging, aging is switched to the tape deck.
<Tape Deck>
1. The tape in deck A is rewound to the head.
2. The FWD side is played back for 2 minutes.
3. The tape is fast forwarded (FF) for 20 seconds. The following procedure is performed when the tape end is reached before the 20 seconds.
4. The REV side is played back for 2 minutes.
5. The tape is rewound to the head (REW).
6. The tape in deck B is rewound to the head.
7. The FWD side is played back for 2 minutes.
8. The tape is fast forwarded (FF) for 20 seconds. The following procedure is performed when the tape end is reached before the 20 seconds.
9. The REV side is played back for 2 minutes.
10. The tape is rewound to the head (REW).
11. Aging is switched to the CD player.
– 13 –


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www.DataSheet4U.coSmECTION 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 demagne-
tizer.
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 sup-
ply voltage unless otherwise noted.
Torque Measurement
Mode
Torque meter
FWD
FWD
back tension
REV
REV
back tension
FF/REW
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
FWD tension
CQ-403A
REV tension
CQ-403R
Meter reading
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
100 g or more
(3.53 oz or more)
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 sup-
ply 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 adjust-
ment.)
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
P-4-A100
WS-48B
P-4-L300
Signal
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
Used for
Azimuth Adjustment
Tape Speed Adjustment
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)
main board
CN301
Pin 1 (L-CH)
Pin 3 (R-CH)
level meter
set
main board
CN301
Pin 2 (GND)
+
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
peak
output
level within
1 dB
within 1dB
screw
position
R-CH
peak
L-CH
peak
R-CH
peak
screw
position
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3. Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
set
main board
CN301
Pin 1 (L-CH)
oscilloscope
Pin 2 (GND)
L
R
Pin 3 (R-CH)
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)
1 Remove the four claws
2 Window
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 “VOLUME” 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
(315Hz, 0dB)
level meter
set
Reverse
Foward
main board
CN301
Pin 1 (L-CH)
Pin 3 (R-CH)
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
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Record Bias Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjust-
ment, 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 ad-
justment. During recording, the input signal FUNCTION will auto-
matically 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)
2)
315 Hz
10 kHz
}
50
mV
(–23.8
dB)
AF OSC
600
attenuator
blank tape
CS-123
set
Record Level Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjust-
ment, 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 au-
tomatically 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
315Hz 50 mV (–23.8 dB)
AF OSC
600
attenuator
blank tape
CS-123
set
4. Mode: Playback
recorded
position
set
level meter
4. Mode: Playback
recorded
position
set
level meter
main board
CN301
Pin 1 (L-CH)
Pin 3 (R-CH)
5. Confirm playback the signal recorded in step 2 become adjust-
ment 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
main board
CN301
Pin 1 (L-CH)
Pin 3 (R-CH)
5. Confirm playback the signal recorded in step 2 become adjust-
ment 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:
[AUDIO BOARD] (Conductor Side)
RV341(Lch),RV441(Rch)
Record Bias
RV301 RV401
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
RV411
RV311
[MAIN BOARD] (Conductor Side) RV301
Record Level (Lch)
13
IC301 CN301
RV351
Record Level (Rch)
– 16 –


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TUNER SECTION 0dB=1µV
Note 1: As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
Note 2: No adjustment is needed due to a tuner pack for except
AEP, UK, German, East European, CIS models.
AM Tuned Level Adjustment
(AEP, UK, German, East European, CIS model only)
Note: FM Tuned Level adjustment should be performed after this
AM Tuned Level Adjustment.
Setting:
Band: MW
loop antenna
loop antenna
(Supplied accessories)
AM RF SSG
set
30% amplitude
modulation by
400Hz signal
Modulation: 999 kHz (at 9 kHz step)
1,050 kHz (at 10 kHz step)
60cm
AM antenna
terminal (TM1)
Field strength dB (µV/m) = SSG output level dB (µV/m) –26dB.
Procedure:
1. Set the output of SSG so that the input level of the set becomes
55 dB.
2. Tune the set to 999 kHz or 1,050 kHz.
3. Adjust RV41 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
FM Tuned Level Adjustment
(AEP, UK, German, East European, CIS model only)
Note: This adjustment should be performed after the AM Tuned
Level Adjustment.
Setting:
Band: FM
FM RF SSG
75 coaxial
set
Carrier frequency: 98MHz
Modulation:
AUDIO 1kHz, 75kHz
deviation (100%)
Output level:
25dB (at 75 open)
FM ANTENNA terminal (TM1)
Procedure:
1. Supply a 25 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust RV42 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
Adjustment Location
[TCB BOARD] (Component Side)
RV41
AM Tuner Level
TM1
RV42
FM Tuned
Level
IC21
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FM Polar Adjustment (East European, CIS model only)
Connection 1 :
FM RF SSG
75 coaxial
set
FM antenna
terminal (75 )
Carrier frequency: 69 MHz
Output level:
1 mV (60 dBµ) (at 75 open)
Modulation:
AUDIO 1 kHz, 10 kHz deviation
Connection 2 :
AF OSC
FM RF SSG
75 coaxial
set
Audio 31.25 kHz
external
modulation
terminal
FM antenna
terminal (75 )
Carrier frequency: 69 MHz
Output level:
1 mV (60 dBµ) (at 75 open)
Modulation:
AUDIO 31.25 kHz, 10 kHz deviation
(EXTERNAL MODULATION)
Procedure :
1. Set the modulation of FM RF SSG to AUDIO 1 kHz, 10 kHz
deviation according to “Connection 1”.
2. Tune the set to 69 MHz.
3. Adjust the RV1702 so that the reading of frequency counter con-
nected to TP1702 (VCO) becomes within 31.25 kHz ± 0.05 kHz.
(VCO adjustment)
4. Then record the reading of the level meter connected to TP1701.
5. Set the modulation of FM RF SSG to AUDIO 31.25 kHz, 10
kHz deviation according to “Connection 2”.
6. Tune the set to 69 MHz.
7. Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter con-
nected to TP1701 (FILTER) becomes maximum.
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 (FILTER) becomes maximum. (SUB CAR-
RIER PEAK Adjustment)
9. Adjust the RV1701 so that the level at the moment becomes 14
dB higher value than the level recorded in step 4. (SUB CAR-
RIER LEVEL Adjustment)
Adjustment Location: TCB board
Adjustment Location:
[TCB BOARD] (Conductor Side)
frequency counter
level meter
TP1701
(FILTER)
IC1701
[TCB BOARD] (Component Side)
L1701
CT1701 Sub Carrier Peak
RV1701
Sub Carrier
Level
IC1701
TP1702
(VCO)
RV1702
VCO
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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 10Mimpedance.
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
BD board
oscilloscope
TP (FEO)
TP (VC)
+
Procedure :
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test point TP (FOK) and Ground by lead wire.
3. Turn Power switch on.
4. Put disc (YEDS-18) in and turned Power switch on again and
actuate the focus search. (actuate the focus search when disc
table is moving in and out.)
5. Check the oscilloscope waveform (S-curve) is symmetrical be-
tween A and B.And confirm peak to peak level within 3 ± 1Vp-p.
S-curve waveform
symmetry
A
Within 3 ± 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 bright-
ness to obtain best waveform.
RF Level Check
BD board
oscilloscope
TP (RF)
TP (VC)
+
Procedure :
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
Note: Clear RF signal waveform means that the shape “” can be
clearly distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
E-F Balance (Traverse) Check
BD board
oscilloscope
TP (TE)
TP (VC)
+
Procedure :
1. Connect oscilloscpe to test point TP (TEO) on BD board.
2. Turned Power switch on. Press FUNCTION button to select
CD.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the p button, ENTER/NEXT button and ^ button
simultaneously several times until the ‘’SHUFFLE” on the
fluorescent display tube blinks.
(The sledding servo is turned OFF.)
5. Check the level B of the oscilliscope’s waveform and the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 7%
Traverse waveform
Center of the waveform
B
0V A (DC voltage)
level : 500 mV ± 100 mVp-p
6. Press the p button, ENTER/NEXT button and ^ button
simultaneously several times until the ‘’SHUFFLE” on the
fluorescent display tube goes off. (The tracking servo and
sledding servo are turned ON.) Confirm the C (DC voltage) is
almost equal to the A (DC voltage) is step 5.
Traverse waveform
0V
Sled servo
OFF
Adjustment Location :
Sled servo
ON
[ BD BOARD ] — SIDE A —
TP (RF)
IC101
TP
(VC)
TP
(FOK)
TP
(TEO)
TP
(GND)
TP
(FEO)
IC102
IC103
C (DC
voltage)
level : 1.3 ± 0.3 Vp-p
IC102
– 19 –
SECTION 7
DIAGRAMS
7-1. CIRCUIT BOARDS LOCATION
TRANSFORMER board
LEAF SW board
AUDIO board
MAIN board
CONT COM board
POWER board
DECO board
CD-SW board
MIC board
CONNECTOR board
PANEL board
MOTOR (TURN) board
HP board
BD board
SENSOR board
MOTOR (SLIDE) board
– 20 –
ENCAPSULATED
COMPONENT (GRX8/R800)
TCB board (RX88/RX99)


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7-2. BLOCK DIAGRAMS
– TUNER SECTION – (AEP, UK, German model)
TM1
ANTENNA
FM 75
COAXIAL
AM
ST +10V
Q5
ANT IN
FE1
FM FRONT END
IF OUT
CF1
10.7MHz
IF AMP
Q1, 2
CF2
10.7MHz
IF AMP
Q3, 4
CF3
10.7MHz
1 FM IN
FM DET OUT 23
FE2
MW/LW FRONTEND
6
5
3
2
26 25 24 23 22 21 20
Q14
LW SW
Q13
MW
SW
Q12
MW
SW
10 17 9
09
PLL
IC21
FM/AM MPX
IC41
12
LW SW
Q9
13
28 REG
14
15
16
17
Q11
MW
SW
29 AM OSC
26 FM AFC
27 AM RF IN
AM MIX 2
AM IF
IFT41
4 AM IF
AM
DET 24
OUT
AM
SD 12
ADJ RV41
X41
10.7MHz
9
FM
DET
STEREO 7
TUNED 6
AM
TUNED
LEVEL
RV42
FM
TUNED
LEVEL
30 14 15 13
AM
SD
10
X42
450kHz
D41
X21
4.5MHz
11
14 7 2 12
1 24
CE 3
DI 4
CL 5
DO 6
22 MPX IN OUT L 21
OUT R 20
LPF
19
AMP
IN
L
AMP
OUT
17
L
RCH
IC1751
57
RDS DECODER
IC1752
42
16
13 14
X1751
4.332MHz
ST L
RDS INT
RDS DATA
STEREO
TUNED
• R CH: Same as L ch
• SIGNAL PATH
: FM
: MW
A
MUTE
MAIN
SECTION
(Page 29)
ST-CE
COM-DIN
COM-CLK
COM-DATA
– 21 –
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HCD-GRX8/R800/RX88/RX99
– TUNER SECTION – (East European, CIS model)
TM1
ANTENNA
FM 75
COAXIAL
AM
ST +10V
Q5
ANT IN
FE1
FM FRONT END
IF OUT
CF1
10.7MHz
IF AMP
Q1-4
CF3
10.7MHz
1 FM IN
FM DET OUT 23
FE2
MW/LW FRONTEND
6
5
3
2
26 25 24 23 22 21 20
Q14
LW SW
Q13
MW
SW
Q12
MW
SW
10 17 9
09
PLL
IC21
FM/AM MPX
IC41
12
LW SW
Q9
13
28 REG
14
15
16
17
Q11
MW
SW
29 AM OSC
26 FM AFC
27 AM RF IN
AM MIX 2
AM IF
IFT41
4 AM IF
AM
DET 24
OUT
AM
SD 12
ADJ RV41
X41
10.7MHz
9
FM
DET
STEREO 7
TUNED 6
AM
TUNED
LEVEL
RV42
FM
TUNED
LEVEL
30 14 15 13
AM
SD
10
X42
450kHz
D41
D42 D43
X21
4.5MHz
11
14 7 2 12 8
1 24
13
22 MPX IN
OUT R 20
OUT L 21
RCH
SUB CARRIER
PEAK
CT1701 L1701 TP1701 2 IN
POLAR
DECODER
IC1701
L OUT 7
POLAR/PILOT
SWITCH
IC1702
12 L IN
13 POLA
L IN
L OUT 14
3 POUT
R OUT 6
R CH
R OUT 4
CA
9 11
AMP
LPF
19 IN
L
AMP
OUT
17
L
• R CH: Same as L ch
• SIGNAL PATH
R CH : FM
: MW
RV1701
SUB CARRIER
LEVEL
20 SUB IN
18 17
TP1702
RV1702
VCO
10 9
D1701
D1702
SWITCH
Q1701
SWITCH
Q1702
SWITCH
Q1703
CE 3
DI 4
CL 5
DO 6
D1703
D1704
ST-L
STEREO
TUNED
MUTE
A
ST-CE
COM-DIN
COM-CLK
COM-DATA
MAIN
SECTION
(Page 29)
– 23 –
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– CD SECTION –
OPTICAL PICK-UP BLOCK
DETECTOR
E
A
B
B+
K
A
DD
CC
B
F
LASER
DIODE
FOCUS/TRACKING SERVO.
RF AMP
IC101 (1/2)
1
4
38 PD1
RF O 33
2 39 PD2
5 LOCK 19
10
41 F
C.OUT 24
6
42 E
SENS1 25
LD DRIVE
Q101
2 FEI
1 FEO
45 TEO
47 TEI
SENS2 26
FE O 6
FE M 7
TA M 12
TA O 13
DATA 22
XLT 21
CLK 20
36 LD
FOK 27
37 PD
XRST
23
FOCUS
COIL
TRACKING
COIL
2-AXIS
DEVICE
9
MUTE
T+
15 TRACKING
16 COIL DRIVE 27
T–
FOCUS/TRACKING
COIL DRIVE
IC102 (1/2)
F–
F+
18
17
FOCUS
COIL DRIVE
26
M102
M
SLED MOTOR
11
12
SLED/SPINDLE
MOTOR DRIVE
IC102 (2/2)
SLED MOTOR
DRIVE
6
SLED
SERVO
IC101 (2/2)
16 SL O
SL P 14
M101
SPINDLE
MOTOR
M
09
13
14
SPINDLE MOTOR
DRIVE
3
1 D.OUT
71
IC391
CD DIGITAL
OUT
OPTICAL
X101
16.9344MHz
89 • 90
44 RF
29 LOCK
14 CNIN
15 SEIN
15 16 17 27 23
DIGITAL SIGNAL PROCESSOR
IC103
21
S101
LIMIT
10 11 12
75 8 7 9
100
LOUT1 86
LOUT2 93
L-CH
R-CH
CD CLK
CD DATA
SENS2
SCOR
SQ DATA
SQ CLK
SENS
M701
TURN M
MOTOR
M801
SLIDE M
MOTOR
TABLE
SENSOR
IC702
DISC
SENSOR
IC703
ROTARY
ENCODER
S811
Q701
TURN
MOTOR DRIVER
IC701
S801
OPEN/CLOSE
DET
7 OUT1
2 OUT2
IN1 3
IN2 6
SLIDE
MOTOR DRIVER
IC801
4 OUT2
7 OUT1
RIN 2
FIN 10
XRST
XLAT
T. SENS
DISC SENS
ENC 1
ENC 2
ENC 3
OPEN
TBL.L
TBL.R
LOAD IN
LOAD OUT
C
MAIN
SECTION
(Page 29)
• R CH: Same as L ch
• SIGNAL PATH
: CD
: Digital out
– 25 –
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– DECK SECTION –
L
HP101
PB HEAD
(DECK A) R
L
REC/PB HEAD
(DECK B)
R
HRPE101
ERASE HEAD X
09
S1004
A CrO2
S1008
B CrO2
IC611
RV311
PLAYBACK
LEVEL
DECK A
R CH
IC601
RV301
PLAYBACK
LEVEL
DECK B
R CH
31
IC602
PR
4
REC/PB
RV341
REC
BIAS
ERASE BIAS
REC BIAS
16
PB-A/B
48 A IN
46 B IN
17
A 120/70
70
19
B 120/70
PAS
28 27
120
DOLBY NR
IC301
DOL
DOLBY NR
MS
36 EQOUT
RV301
REC LEVEL
EQIN 38
39 RECOUT
DOLBY
TYPE B
BIAS SW
32 33
+7.5V
Q623
BIAS OSC
T621, Q621, 622
M1
CAPSTAN
MOTOR
M
26
PB OUT
40
LM ON/ 25
OFF
NORM/
HIGH 18
NR ON/
OFF 23
24
PB
RIN 44
BIAS ON/OFF 20
RM ON/OFF 22
ALC ON/OFF 15
CAP MOTOR
CONTROL
Q336-343
SPEED
CONTROL
Q1001
RV1002
NORMAL
SPEED
RV1001
HIGH
SPEED
CN301
3
R CH
1
SWITCH
Q335
REEL
DETECT
IC1001
• R CH : Same as L ch
• SIGNAL PATH
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
REEL
DETECT
IC1002
S1001 (A PLAY)
+5V
S1002 (B PLAY)
S1003
(A HALF)
+5V
+5V
PB A/B
MS OUT
PB L
LM ON/OFF
NORM/HIGH
NR ON/OFF
REC/PB/PASS
REC L
BIAS ON/OFF
RM ON/OFF
ALC ON/OFF
RELAY REC/PB
CAPM CNT1M
CAPM CNT2M
CAPM CNT1P
CAPM CNT2P
CAP M H / L
A SHUT
B SHUT
A PLAY
B PLAY
• PLUNGER SOLENOID is supplied
as the MECHANICAL BLOCK ASSY.
A DECK/
B DECK
PLUNGER
S1005
(REC A)
S1006
(B HALF)
S1009
(REC B)
TRIGGER
MOTOR
CONTROL
Q331-334
B HALF
B TRIG
A TRIG
B
MAIN
SECTION
(Page 29)
HCD-GRX8/R800/RX88/RX99
– 27 –
– 28 –


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– MAIN SECTION –
(Page 34)
DISPLAY
SECTION
F
VIDEO/IN
(AUDIO)
L
MD IN L
J751
MIX
MIC
RV750
MIC
LEVEL
IC750(1/2)
DJ-SIG
DJ-MUTE
J101
MD/VIDEO
(AUDIO)
OUT L
PB L
REC L
GRX8:EA3
ECHO PROCESSOR
IC751
2 LPF 1 IN LPF 2 OUT 9
ECHO
LEVEL
IC411(1/2)
31
IC750(2/2)
MUTE
Q411
IC411(2/2)
67
64 V
69 MD
67 TC
66 TU
68 CD
SELECT
SWITCH
MICON
INTERFACE
34 33 32
123
60
R-CH
B
DECK
SECTION
(Page 28)
A
TUNER
SECTION
(Page 22, 24)
C
CD
SECTION
(Page 26)
09
RELAY REC/PB
A SHUT
B SHUT
B HALF
A HALF
A PLAY
B PLAY
PB A / B
NORM/HIGH
BIAS ON/OFF
RM ON/OFF
NR ON/OFF
REC/PB PASS
CAPM CNT1M
CAPM CNT2M
CAPM CNT1P
CAPM CNT2P
ALC ON/OFF
LM ON/OFF
CAP M H/L
A TRG
B TRG
MS OUT
ST L
RDS DATA
RDS INT
COM DIN
COM DATA
STEREO
TUNED
ST CE
MUTE
COM CLK
L CH
TBL. L
TBL. R
SCOR
T. SENS
SENS 2
SENS
X RST
CD CLK
CD DATA
DISC SENS
SQ CLK
SQ DATA
X LAT
OPEN
ENC-1
ENC-2
ENC-3
LOAD IN
LOAD OUT
– 29 –
R-CH MIX AMP
IC401
67
EQ
IC111(1/2)
2
EQ
AMP
42
58
57
VOLUME
IC111(2/2)
41
36
MUTE
Q113
38 39
40
61
SUPER WOOFER
AMP
IC191
DBFB
SWITCH
Q111,112
97 TC RELAY
26 A SHUT
27 B SHUT
28 B HALF
98 A HALF
95 A PLAY SW
96 B PLAY SW
87 PB A/B
93 EQ H//N
92 BIAS
90 REC MUTE
89 NR ON/OFF
88 R/P PASS
85 CAPM CNT1M
86 CAPM CNT2M
17 CAPM CNT1P
77 CAPM CNT2P
99 ALC ON/OFF
87 TC MUTE
82 CAP M H/L
83 A TRG
84 B TRG
31 AMS IN
1
3 M62442 LAT
2 52 M62442 DATA
3 51 M62442 CLK
MASTER CONTROL
IC501
66 ST DIN
70 STEREO
69 TUNED
68 ST CE
72 ST MUTE
67 ST DOUT
65 ST CLK
60 TBL L
61 TBL R
18 SCOR
76 T SENS
73 SENS 2
74 SENS
57 XRST
48 CD CLK
47 CD DATA
75 DISC SENS
36 SQ CLK
34 SQ DATA IN
58 XLT
81 OUT OPEN
80 ENC1
79 ENC2
78 ENC3
64 LOAD IN
63 LOAD OUT
22 RDS DATA
RX88/RX99:
AEP,UK,G
21 RDS INT
DBFB H/L 2
TA MUTE 1
F RELAY 6
R RELAY 7
PL RELAY 8
IIC DATA 55
IIC CLK 56
RESET 15
AC CUT 16
RESET
SWITCH
Q951
RESET
IC951
X1 11
X2 10
D951
+5V
X501
5MHz
XT1 14
XT2 13
X502
32.768KHz
POWER 5
CD POWER 46
STK MUTE 100
MUTE
SWITCH
Q142
MUTE
Q191
DBFB
SWITCH
Q141,143
J191
SUPER
WOOFER
– 30 –
SPE SIG
IIC DATA
IIC CLK
RESET
FRONT
E
DISPLAY
SECTION
(Page 33)
DBFB
F RELAY
R RELAY
PL RELAY
D
POWER
SECTION
(Page 31)
POWER ON/OFF
CD POWER
STK MUTE
• R CH: Same as L ch
• SIGNAL PATH
: FM
: CD
: PB
: REC
: VIDEO/MD
• Abbreviation
G : German model.
EA3 : Saudi Arabia model.


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– POWER SECTION –
PL RELAY
R RELAY
F RELAY
FRONT
POWER AMP
IC201
FRONT
3
8
12
D
MAIN
SECTION
(Page 30)
DBFB
STK MUTE
CD POWER
CD+5V
AU/D5V SW
POWER ON/OFF
09
HCD-GRX8/R800/RX88/RX99
GRX/R800/RX99
RY402
RELAY
DRIVE
Q403,407
RX88
TM402
SURROUND
SPEAKER
RELAY
DRIVE
Q408
RY404
GRX8/R800/RX99
FAN MOTOR
DRIVER
Q961, 962
UNREG
–12V
Rch
M901
M FAN
MOTOR
THERMAL
DET
Q321,322
THP321
OVER LOAD
DET
Q201
Rch
RY401
RELAY
DRIVE
Q401,402
Rch
FRONT
TM401
FRONT
SPEAKER
J755
PHONES
Rch
MUTE
SWITCH
Q304,305
Rch
D5V
SWITCHED
CD REG
Q931
+5.6V
Q932
D932
+5V REG
Q933
M+7V
Q934
A+7V
Q937
A–7V
SWITCH
Q901
Q905
+5.6V REG
IC931
31
+7V REG
IC941
31
+7V REG
IC901
31
–7V REG
IC902
32
– 31 –
+10V
ST+10V
+10V REG
IC911
31
31
+10V REG
IC921
PROTECT
CONTROL
Q306,307
+12V REG
Q911-913
RECT
D103,
D104
T501
POWER
TRANSFORMER
VF
VF
UNREG
–12V
POWER B+
POWER B–
RECT
D102
RECT
D101
VFDP
VF REG
Q111
RECT
D111,112
GRX8/R800
RELAY
+7V DRIVER
Q101
RX88/RX99
RY101
GRX8:E2,E3,SP,MY,HK,TW,EA3
/R800:AR
VOLTAGE
SELECTOR
S501
AC
IN
• R CH : Same as L ch
• SIGNAL PATH
: FM
• Abbreviation
E2 : Without SW tuner E model.
E3 : Without SW tuner E model.
EA3 : Saudi Arabia model.
SP : Singapore model.
MY : Malaysia model.
HK : Hong Kong model.
TW : Taiwan model.
AR :Argentine model.
– 32 –


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– DISPLAY SECTION –
IIC DATA
IIC CLK
RESET
E
MAIN
SECTION
(Page 30)
SPE SIG
09
24 SDA
23 SCL
10 RESET
X601
8MHz
8 XOUT
9 XIN
DISPLAY CONTROL
IC601
LED1
LED15
L SEL
79
80
1
6
11
12
14
18
25
LED
SWITCH
SIRCS
SPEANA 1
SPEANA 2
SPEANA 3
SPEANA 4
L+R
JOG A
JOG B
33
34
35
36
37
32
21
22
KEY 0 26
KEY 3 29
PANEL LED
Q601,602
D+5V
LED
CONTROL
Q603
REMOTE
CONTROL
RECEIVER
IC602
S601
(JOG)
ROTARY
ENCODER
KEY
MATRIX
SEG1-SEG20
54 - 57
GR1-GR13
41 - 53
FL601,Q70,702
FLUORESCENT INDICATOR TUBE
VOL A 19
VOL B 20
VF
SPEANA BPF FILTER
IC603
4 LINE IN
F01 17 SP1
F02 16 SP2
F03 15 SP3
F04 14 SP4
L+R
L+R
13
S602
VOLUME
ROTARY
ENCODER
X501
8MHz
SP1
SP4
L+R
PANEL CONTROL
IC801
19 I2C DATA
18 I2C CLK
4 RESET
29 SIRCS
27 JOG A
28 JOG B
KEY O 38
KEY 1 39
BPM LED B 61
BPM LED A 62
S801-808
KEY
MATRIX
LED
SWITCH
Q854,855
D801-803
BOMBER LED 63
ON/OFF LED 64
D805
D806
PANEL LED
2 XOUT
3 XIN
33 BPF LOW
36 BPF HIGHT
37 L+R
MUTE 5
DATA
CLK
LAT
CH
RST
BSY
14
15
16
13
12
20
SPEANA
CONTROL
Q958-960
SOUND MIX
IC851
MUTE
SWITCH
Q851
15 SD
14 SI
8 ST
16 CH
17 RST
20 BUSY
XT
2
OUT 23
XT
3
X851
4.09MHz
DJ MUTE
DJ SIG
F
MAIN
SECTION
(Page 29)
– 33 –
– 34 –


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THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in and 1/4 W or less unless otherwise
specified.
¢ : internal component.
C : panel designation.
Note: The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part number specified.
U : B+ Line.
V : B– Line.
H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 M).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal pro-
duction tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F : FM
f : AM
g : VIDEO/MD
E : PB (DECK A)
d : PB (DECK B)
G : REC (DECK B)
J : CD
c : digital out
• Abbreviation
G : German model.
E2 : Without SW tuner E model.
E3 : With SW tuner E model.
EA3 : Saudi Arabia model.
EA4 : Israeli model.
EE : East European model.
AUS : Australian model.
SP : Singapore model.
MY : Malaysia model.
HK : Hong Kong model.
TW : Taiwan model.
AR : Argentine model.
IA : Indonesian model.
TH : Thai model.
MX : Mexican model.
SAF : South African model.
For printed wiring boards.
Note:
X : parts extracted from the component side.
p : parts mounted on the conductor side.
® : Through hole.
b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
WAVEFORMS
– CD SECTION –
1
1.3Vp-p
500mV/DIV, 500nsec/DIV
IC101 RFO
2
0.5Vp-p
200mV/DIV, 1µsec/DIV
IC101 2 FEI
3
0.2Vp-p
50mV/DIV, 1msec/DIV
IC101 TEI
4
7.8µsec
2.5Vp-p
IC103 MDP
5
230µsec
5Vp-p
IC103 XPCK
6
135µsec
5Vp-p
IC103 ^™ RFCK
7
135µsec
5Vp-p
IC103 WFCK
8
2.6Vp-p
16.9344MHz
IC103 XTAI
– 35 –
– TUNER SECTION –
(AEP, UK, German model)
1
4.2Vp-p
4.5MHz
IC21 XOUT
2
2Vp-p
4.332MHz
IC1752 OEC O
– TUNER SECTION –
(East European, CIS model)
1
4.2Vp-p
4.5MHz
IC21 XOUT
– MAIN SECTION –
1
5.5Vp-p
5MHz
IC501 0 X2
2
5Vp-p
32.768kHz
IC501 XT2
– DISPLAY SECTION –
1
4Vp-p
8MHz
IC601 8 X-OUT
2
4.3Vp-p
8MHz
IC801 2 X-OUT
3
3.6Vp-p
4.09MHz
IC851 2 TX
– 36 –


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7-3. PRINTED WIRING BOARD — CD SECTION —
• See page 20 for Circuit Boards Location.
• Semiconductor
Location
Ref. No. Location
IC101
IC102
IC103
C-5
B-5
C-6
Q101 C-3
• Indication of transistor
C
Q
BE
These are omitted
– 37 –
(Page 38)
– 38 –


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7-4. SCHEMATIC DIAGRAM — CD SECTION —
• See page 35 for Waveforms.
• See page 85 for IC Block Diagrams.
• See page 88 for IC Pin Functions.
– 39 –
HCD-GRX8/R800/RX88/RX99
(Page
56)
– 40 –




RX88.pdf
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