Sony HCD-GRX10AV User manual

– 1 –
HCD-GRX10AV/RX110AV
Canadian Model
AEP Model
UK Model
HCD-RX110AV
E Model
Australian Model
HCD-GRX10AV
SPECIFICATIONS
Photo:HCD-GRX10AV
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
— Continued on next page —
Model Name Using Similar Mechanism HCD-H991AV
CD Mechanism Type CDM38L-5BD29AL/
CDM38LH-5BD29AL
Base Unit Type BU-5BD29AL
Optical Pick-up Type KSS-213D/Q-NP
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type TCM-230AWR1/230PWR1
CD
SECTION
TAPE
DECK
SECTION
HCD-GRX10AV/RX110AV is the
tuner,deck,CDandamplifiersection
in MHC-GRX10AV/RX110AV.
MICROFILM

– 2 –

– 3 –
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.
The following
caution label is
located inside of
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.
NOTES ON HANDLINGTHE 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 “CDsectionadjustment”andcheck
that the S curve waveform is output three times.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LESCOMPOSANTSIDENTIFIÉSPAR UNEMARQUE!SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT.NEREMPLACERCES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY.
PARTS No.
4-996-819-0π
4-996-819-1π
4-996-819-2π
4-996-819-3π
4-996-820-0π
4-996-820-1π
4-996-820-2π
4-996-820-3π
4-996-820-4π
MODEL
RX110AV: AEP, UK, G
RX110AV: EE, CIS
RX110AV: CND
GRX10AV: TH
GRX10AV: E2, E3
GRX10AV: SP, MY
GRX10AV: HK
GRX10AV: AUS
GRX10AV: EA
MODEL IDENTIFICATION
— BACK PANEL —
• Abbreviation
CND : Canadian model
G : German model
EE : East European model
EA : Saudi arabia model
HK : Hong Kong model
SP : Singapore model
MY : Malaysia model
AUS : Australian model
TH : Thai model
E2 : Without SW tuner E model.
E3 : With SW tuner E model.
Parts No.

– 4 –
TABLE OF CONTENTS
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. Schematic Diagram – Surround Section – ....................... 83
7-31. Printed Wiring Board – Surround Section –..................... 83
7-32. IC Block Diagrams ...........................................................84
7-33. IC Pin Functions ...............................................................90
8. EXPLODEDVIEWS
8-1. Case Section...................................................................... 100
8-2. Chassis Section ................................................................. 101
8-3. Front Panel Section ........................................................... 102
8-4. CD Mechanism Deck Section-1
(CDM38L-5BD29AL, CDM38LH-5BD29AL) ............... 103
8-5. CD Mechanism Deck Section-2
(CDM38L-5BD29AL, CDM38LH-5BD29AL) ............... 104
8-6. Base Unit Section (BU-5BD29AL) .................................. 105
8-7. TC Mechanism Section 1
(TCM230AWR1, TCM230PWR1) ................................... 106
8-8. TC Mechanism Section 2
(TCM230AWR1, TCM230PWR1) ................................... 107
9. ELECTRICAL PARTS LIST ...................................... 108
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
5. MECHANICAL ADJUSTMENTS ..........................14
6. ELECTRICAL ADJUSTMENTS ............................... 14
7. DIAGRAMS
7-1. Circuit Boards Location ......................................................20
7-2. Block 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

– 5 –
SECTION 1
SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
TURNS OFF
1 Remove the Case.
Note for Installation (ROTARY ENCODER)
3 pull-out the disc tray.
2 Turn the cam to the
direction of arrow.
BU cam
Groove Section A
Note:When attaching the Base unit, Insert the
section A into the groove of BU cam.
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.

– 6 –
SECTION 2
GENERAL
Front Panel
234 561
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
29
3031323334
3536373839 28
41
42
43
44
45
46
47
48
49
50
51
52
53
54
40

– 7 –
LOCATION OF PARTS AND CONTROLS
11/u button
2DISC 1 button
3DISC 2 button
4DISC 3 button
5DISC SKIP/EX-CHANGE button
6§button
7FUNCTION button
8Deck A ªbutton
9Deck A ·button
10 Deck B ªbutton
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 pbutton
18 PRO LOGIC button
19 DSP button
20 KARAOKE PON/MPX button
21 PTY button (AEP, UK, G model)
22 PHONES jack
23 rREC button
24 PPAUSE button
25 HI-PUB button
26 CD SYNC button
27 VOLUME knob
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 MIX MIC jack
41 MIC LEVEL knob
42 PADA button
43 PAD B button
44 NON STOP button
45 FLASH button
46 LOOP button
47 FILE SELECT button
48 EFFECT button
49 GEQ CONTROL button
50 P FILE MEMORY button
51 DISPLAY button
52 DEMO button
53 CLOCK/TIMER SET button
54 TIMER/SELECT button

– 8 –
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. LOADING PANEL
3-2. FRONT PANEL
3 Loading panel
2 Pull-out the disc tray.
1 Turn the cam to the direction
of arrow.
Claws
1 Three screws
(BVTP3x8)
9 Front panel assembly
2 Screw
(BVTP3x10)
3 Screw
(BVTP3x10)
4 Connector
(CN203)
5 Connector
(CN752)
8 Flat type wire
(CN101)
7 Flat type wire
(CN106)
6 Flat type wire
(CN107)

– 9 –
3-3. CASSETTE MECHANISM DECK
3-4. PANEL BOARD AND CONT COM BOARD
1 Ten screws
(BVTP 2.6x8)
2 Three screws
(BVTP 2.6x8)
!™ Four screws
(BVTP 2.6x8)
!£ Six screws
(BVTP 2.6x8)
3 Panel board
!¢ CONT COM board
!º Screw
(BVTP 2.6x8)
!¡ Wire
4 Shield
5 Flat type wire
(CN602)
6 Konb(Jog)
7 Nut
9 Nut
8 Konb(Volume)
1 Two screws
(BVTT 2x4)
2 Two screws
(BVTT 2x4)
9 Three screws
(BVTP 2.6x8)
!º Two screws
(BVTP 2.6x8)
!¢ Two screws
(BVTP 2.6x8)
!¡ Screw
(BVTP 2.6x8)
!™ Screw
(BVTP 2.6x8)
!£ Wire holder
!∞ Bracket
!§ Mechanism deck
3 Damper, oil
4 Damper, oil
5 Push the cassette lids.
6 Remove the cassette lids.
7 Spring
8 Spring

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

– 11 –
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 – 0button 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 AMTuner 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 IndicatorTube 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.

– 12 –
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 pbutton, 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 “TAPEA” or “TAPE
B”, aging is started from deckA.
If the function is set to others, aging will not be started until the function is switched to CD or TAPE.
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 Main Cause
NO DISC ERR
FOCUS1 ERR
FOCUS2 ERR
GFS ERR
FBIAS ERR
SENSOR ERR
TABLE ERR
TRAY ERR
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
Aging of CD player (12 minutes)
Aging of deck A
Aging of deck B Maximum about 12 minutes

– 13 –
Tape Deck
Display of Operations Operation
TAPE AAG-1
TAPE AAG-2
TAPE AAG-3
TAPE AAG-4
TAPE AAG-5
TAPE B AG-1
TAPE B AG-2
TAPE B AG-3
TAPE B AG-4
TAPE B AG-5
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.

– 14 –
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
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)
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1.Mode : Playback
Signal Used forTape
SECTION 5
MECHANICAL ADJUSTMENTS
Mode
FWD
Torque meter
CQ-102C
Meter reading
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
SECTION 6
ELECTRICAL ADJUSTMENTS
DECK SECTION 0 dB=0.775V
1.Demagnetize the record/playback head withaheaddamagnetizer.
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.
P-4-A100
WS-48B
P-4-L300
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
Azimuth Adjustment
Tape SpeedAdjustment
Level Adjustment
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
R-CH
peak
screw
position
output
level within
1 dB
L-CH
peak R-CH peak
screw
position
within 1dB
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)

– 15 –
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Playback Head (DeckA)
Record/Playback/Erase Head (Deck B)
3. Mode: Playback 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 pbutton, 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
SampleValue ofWow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
Playback Level Adjustment (Deck A, Deck B)
Procedure:
Mode: Playback
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
test tape
P-4-A100
(10kHz, –10dB) oscilloscope
set
L
R
Waveform of oscilloscope
in phase 45
°
90 °
135 °
180 °
good wrong
main board
CN301
Pin
1 (L-CH)
Pin
2 (GND)
Pin
3 (R-CH)
Reverse Foward
1 Remove the four claws
2 Window
test tape
P-4-L300
(315Hz, 0dB) level meter
set
main board
CN301
Pin
1 (L-CH)
Pin
3 (R-CH)
RV1002 RV1001
RV1002(Normal Speed
)
RV1001(High Speed)
Adjustment Location
[LEAF SW BOARD]

– 16 –
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 – 0button 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 rREC button, and then
press the (button to start recording.
3. Mode: Record
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 theAUDIO 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
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 toVIDEO.
(After recording, press the – 0button 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 rREC button, and then
press the (button to start recording.
3. Mode: Record
4. Mode: Playback
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)
4. Mode: Playback
AF OSC
VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
blank tape
CS-123
set
attenuator 600
Ω
} 50 mV (–23.8 dB)
recorded
position level meter
set
main board
CN301
Pin
1 (L-CH)
Pin
3 (R-CH)
AF OSC
VIDEO (AUDIO) IN
315Hz 50 mV (–23.8 dB)
blank tape
CS-123
set
attenuator 600
Ω
recorded
position level meter
set
main board
CN301
Pin
1 (L-CH)
Pin
3 (R-CH)
RV301
Record Level (Lch
)
RV351
Record Level (Rch)
IC301 CN301
1 3
[MAIN BOARD] (Conductor Side)
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV301 RV401
RV341(Lch),RV441(Rch)
Record Bias RV311(Lch),RV411(Rch)
Playback Level (Deck A)
RV311 RV411

– 17 –
Procedure:
1. Supply a 25 dB 98 MHz signal from theANTENNA 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
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.
AMTuned Level Adjustment
(AEP, UK, German, East European, CIS model only)
Note: FM Tuned Level adjustment should be performed after this
AM Tuned LevelAdjustment.
Setting:
Band: MW
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 theTUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
FMTuned Level Adjustment
(AEP, UK, German, East European, CIS model only)
Note: This adjustment should be performed after the AM Tuned
LevelAdjustment.
Setting:
Band: FM
FM ANTENNA terminal (TM1)
FM RF SSG
75
Ω coaxial
Carrier frequency: 98MHz
Modulation: AUDIO 1kHz, 75kHz
deviation (100%)
Output level: 25dB (at 75
Ω open)
set
loop antenna
AM RF SSG
loop antenna
(Supplied accessories)
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)
set
Field strength dB (
µ V/m) = SSG output level dB ( µ V/m) –26dB.
RV41
AM Tuner Level
TM1
RV42
FM Tuned
Level
IC21
Adjustment Location
[TCB BOARD] (Component Side)

– 18 –
FM Polar Adjustment (East European, CIS model only)
Connection 1 :
Connection 2 :
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 toTP1701.
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
connectedtoTP1701 (FILTER) becomes maximum.(SUBCAR-
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)
[TCB BOARD] (Component Side)
Adjustment Location: TCB board
Adjustment Location:
[TCB BOARD] (Conductor Side)
FM antenna
terminal (75
Ω )
FM RF SSG 75
Ω coaxial
Carrier frequency: 69 MHz
Output level: 1 mV (60 dB
µ ) (at 75 Ω open)
Modulation: AUDIO 1 kHz, 10 kHz deviation
set
FM antenna
terminal (75
Ω )
Audio 31.25 kHz external
modulation
terminal
FM RF SSG
AF OSC 75
Ω coaxial
Carrier frequency: 69 MHz
Output level: 1 mV (60 dB
µ ) (at 75 Ω open)
Modulation: AUDIO 31.25 kHz, 10 kHz deviation
(EXTERNAL MODULATION)
set
frequency counter
level meter
TP1701
(FILTER)
TP1702
(VCO)
IC1701
L1701
CT1701 Sub Carrier Peak
RV1701
Sub Carrier
Level
IC1701
RV1702
VCO

– 19 –
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 10MΩimpedance.
4. Clean the object lens by anapplicator with neutraldetergent when
the signal level is low than specified value with the following
checks.
S Curve Check
Procedure :
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test pointTP (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-
tweenA andB.And confirm peak to peak levelwithin 3± 1Vp-p.
S-curve waveform
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 aslong as possible and light upthe bright-
ness to obtain best waveform.
RF Level Check
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
level : 1.3 ± 0.3 Vp-p
oscilloscope
BD board
TP (RF)
TP (VC) +
–
symmetry
A
B
Within 3
± 1 Vp-p
oscilloscope
BD board
TP (TE)
TP (VC) +
–
E-F Balance (Traverse) Check
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 pbutton, 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
0V
level : 500 mV ± 100 mVp-p
A (DC voltage)
Center of the waveform
B
6. Press the pbutton, 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 C (DC
voltage)
Sled servo
OFF Sled servo
ON
Adjustment Location :
[ BD BOARD ] — SIDE A —
oscilloscope
BD board
TP (FEO)
TP (VC) +
–
SECTION 7
DIAGRAMS
7-1. CIRCUIT BOARDS LOCATION
– 20 –
TP (RF)
TP
(FOK)
IC101
TP
(VC)
TP
(GND)
TP
(TEO) TP
(FEO)
IC103
IC102
IC102
CN101
POWER board
CONT (COM) board
AUDIO board
LEAF SW board
TRANSFORMER board
SURROUND boar
d
MAIN board
SENSOR board
CONNECTOR board
BD board
MOTOR (SLIDE) boar
d
MOTOR (TURN) board
CD-SW board
MIC board
PANEL board
HP board
TUNER(FM/AM)
(EXCEPT AEP,UK,German,
East European,CIS)
TCB board
(AEP,UK,German,
East European,CIS)
DECO board

7-2. BLOCK DIAGRAMS
–TUNER SECTION – (AEP, UK, German model)
– 21 – – 22 –
HCD-GRX10AV/RX110AV
TM1
AM
ANTENNA
FM 75Ω
COAXIAL ANT IN
ST +10V
Q5
VT
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
REG
FM/AM MPX
IC41
1710
09
PLL
IC21
11
FM
TUNED
LEVEL
15 13
30 14
RV42
21214 7
10
X42
450kHz
D41
FM SD ADJ OSC.BUFF
AM/FM
VCO STOP
IF BUFF
MUTE
AM
SD
AM
TUNED
LEVEL
12
RV41
2AM IF
IFT41 4
9
AM IF
DET
STEREO
TUNED
7
6
X41
10.7MHz
MUTE
STEREO
TUNED
23 22
FM DET OUT MPX IN 21
20
OUT L
OUT R
LPF
RCH
19 AMP IN L AMP
OUT
L
17
ST L
4
5
3 ST-CE
COM-DIN
COM-CLK
COM-DATA
A
MAIN
SECTION
CE
DI
CL
DO
1 24
X21
4.5MHz
AM MIX
AM
SD
628
5
2
15
17
16
14
12
13
29
26 25 24 23 22 21 20
9
LW SW
Q9
27
FE2
MW/LW FRONTEND
Q11
MW
SW
Q12
MW
SW
Q14
LW SW
Q13
MW
SW
AM OSC
AM RF IN
FM AFC
• R CH: Same as L ch
• SIGNAL PATH
: FM
: MW
RDS DATA
RDS INT
(Page 29)
6
FM
VT1
MW
MW
AM OSC
FM
VCO STOP
FM/AM IF
XIN
XOUT
3
4
13 14
2
16
IC1751 RDS DECODER
IC1752
X1751
4.332MHz
57
FM
ADJ
26
24
AM
DET
OUT