Sony HCD-D90AV User manual

— 1 —
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
— Continued on next page —
Model Name Using Similar Mechanism HCD-H991AV
CD Mechanism Type CDM38L-5BD29AL
Base Unit Type BU-5BD29AL
Optical Pick-up Type KSS-213D/Q-NP
Model Name Using Similar Mechanism HCD-H991AV
Tape Transport Mechanism Type TCM-220WR2
CD
SECTION
TAPE
DECK
SECTION
SPECIFICATIONS
US Model
HCD-D90AV/RX100AV
Canadian Model
AEP Model
UK Model
HCD-RX100AV
E Model
Australian Model
Tourist Model
HCD-GR10AV
Photo : HCD-RX100AV : US model
HCD-D90AV/GR10AV/RX100AV is the
tuner, deck, CD and amplifier section in
MHC-D90AV/GR10AV/RX100AV.
HCD-D90AV/GR10AV/
RX100AV
MICROFILM

— 2 —
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LESCOMPOSANTSIDENTIFIÉSPARUNEMARQUE!SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY.
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.

— 3 —
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
Checktheantenna terminals, metal trim, “metallized” knobs,screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having a
returnto chassis, must notexceed 0.5 mA (500 microampers).Leak-
age current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of aVOM
or battery-operatedAC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
To Exposed Metal
Parts on Set
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.
0.15 µ F1.5k
Ω
AC
voltmeter
(0.75V)
Earth Ground

— 4 —
TABLE OF CONTENTS
1. SERVICING NOTE .......................................................... 5
2. GENERAL .......................................................................... 6
3. DISASSEMBLY
3-1. Loading Panel ....................................................................... 8
3-2. Front Panel ........................................................................... 8
3-3. TC Mechanism Deck and Deco Board (Except US, CND) .. 9
3-4. HP/MIC Board, Display Board and TC SW Board .............. 9
3-5. Disc Tray ........................................................................... 10
4. SERVICE MODE ............................................................ 11
5. MECHANICAL ADJUSTMENTS ..........................13
6. ELECTRICAL ADJUSTMENTS ............................... 13
7. DIAGRAMS
7-1. Circuit Boards Location ...................................................... 19
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
7-3. Printed Wiring Board — CD Section —............................. 33
7-4. Schematic Diagram — CD Section — ............................... 35
7-5. Printed Wiring Board
—Tuner (AEP, UK, German model) Section —................. 38
7-6. Schematic Diagram
—Tuner (AEP, UK, German model) Section —................. 39
7-7. Schematic Diagram
—Tuner (East European, CIS model) Section — ............... 41
7-8. Printed Wiring Board
—Tuner (East European, CIS model) Section — ............... 43
7-9. Printed Wiring Board — Main Section —.......................... 44
7-10. Schematic Diagram — Main Section — .......................... 47
7-11. Schematic Diagram — Deck Section — .......................... 51
7-12. Printed Wiring Board — Deck Section — ....................... 55
7-13. Schematic Diagram — Panel Section — ......................... 58
7-14. Printed Wiring Board — Panel Section —....................... 61
7-15. Schematic Diagram — Power Section — ........................ 65
7-16. Printed Wiring Board — Power Section — ..................... 69
7-17. Schematic Diagram — CD Motor Section — .................. 72
7-18. Printed Wiring Board — CD Motor Section — ............... 73
7-19. IC Block Diagrams ........................................................... 75
7-20. IC Pin Functions ............................................................... 82
8. EXPLODED VIEWS
8-1. Case Section........................................................................ 91
8-2. Main Board Section ............................................................ 92
8-3. Panel Board Section ............................................................ 94
8-4. Front Panel Section ............................................................. 96
8-5. TC Mechanism Section 1 (TCM-220WR2)........................ 97
8-6. TC Mechanism Section 2 (TCM-220WR2)........................ 98
8-7. CD Mechanism Section 1 (CDM38L-5BD29AL) .............. 99
8-8. CD Mechanism Section 2 (CDM38L-5BD29AL) ............ 100
8-9. Base Unit Section (BU-5BD29AL) .................................. 101
9. ELECTRICAL PARTS LIST ...................................... 102
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
Carryout the “S curvecheck” in “CD section adjustment”and check
that the S curve waveform is output three times.
Parts No.
4-986-846-0
4-986-846-1
4-986-846-2
4-986-846-3
4-986-846-4
4-988-023-0
4-988-023-1
4-988-023-2
4-988-023-3
4-988-023-4
4-988-023-5
4-988-023-7
4-988-275-0
4-988-275-1
4-988-275-2
RX100AV: US model
RX100AV: CND model
RX100AV: AEP, UK, G model
RX100AV: EE, CIS model
D90AV : US model
GR10AV : E3, IA model
GR10AV : E2 model
GR10AV : SP model
GR10AV : JE model
GR10AV : HK model
GR10AV : AUS model
GR10AV : TH model
RX100AV: AEP model
GR10AV : EA model
GR10AV : MY model
PARTS No. MODEL PRODUCT
COUNTRY
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
INDONESIA
THAILAND
MALAYSIA
MALAYSIA
MALAYSIA
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
JE :Tourist model
MY :Malaysia model
AUS:Australian model
TH :Thailand model
IA :Indonesian model
E2 :WithoutSWtuner E model
E3 :With SW tuner E model

— 5 —
SECTION 1
SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
TURNS OFF
3 Pull-out the disc tray.
2 Turn the cam to the
direction of arrow.
1 Remove the Case.

— 6 —
SECTION 2
GENERAL
Front Panel
1234567
8
9
!º
!¡
!™
!£
!¢
!∞
!§
!¶ !•
!ª @º @¡ @™@£ @∞
@¢ @§ @¶ @• @ª #º #¡
#™
#£
#¢
#∞
#§
#¶
#• #ª $º $¡ $™ $∞ $§ $¶
%º %¡ %™ %£
%¢
%•
%¶
%ª
$¢ $£
$ª
$• %∞ %§

— 7 —
1POWER button
2DISC SKIP EX-CHANGE button
3CD 0, )button
4DISC1-DISC3 buttons
5CD pbutton
6§OPEN/CLOSE button
7CD ·∏ button
8TIMER SELECT button
9CLOCK/TIMER SET button
0SLEEP button
!¡ P FILE MEMORY button
!™ P FILE button
!£ MUSIC button
!¢ NON-STOP button
!∞ WAVE button
!§ PHONES jack
!¶ MIX MIC jack
!• MIC LEVEL knob
!ª 1/ALL DISCS button
@º DISPLAY/DEMO button
@¡ PLAY MODE button
@™ SPECTRUM ANALYZER button
@£ REPEAT button
@¢ DOLBY NR button
@∞ EDIT button
@§ DIRECTION button
@¶ LOW FREQUENCY button
@• JOG dial, indicator
@ª HIGH FREQUENCY button
#º KARAOKE PON/MPX button
#¡ VOLUME control
#™ FUNCTION button
#£ PTY button (AEP, UK, German)
#¢ TUNER MEMORY button
#∞ TUNER/BAND button
#§ STEREO/MONO button
#¶ TUNING MODE button
#• LOOP button
#ª MOVIE button
$º FLASH button
$¡ GAME button
$™ GROOVE button
$£ ENTER/NEXT button
$¢ PRO LOGIC button
$∞ DSP button
$§ DBFB button
$¶ EFFECT ON/OFF button
$• Deck A ª, ·button
$ª Deck A 0, )button
%º HIGH SPEED DUBBING button
%¡ CD SYNCHRO button
%™ rREC button
%£ Pbutton
%¢ Deck B pbutton
%∞ Deck B 0, )button
%§ Deck B ª, ·button
%¶ Deck A 6button
%• Deck B 6button
%ª Deck A pbutton
LOCATION OF PARTS AND CONTROLS

— 8 —
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. LOADING PANEL
1 Turn the cam to the direction
of arrow.
2 Pull-out the disc tray.
3 Loading panel
3-2. FRONT PANEL
1 Remove the connectors.
(Main board : CN401, CN402, CN701)
2 Two screws (+BVTT3x6)
3 Three screws (+BVTT3x6)
4 Screw (+BVTP3x10)
5 Screw (+BVTP3x10)
6 Claws
7 Front panel
assembly
CN401
CN701
CN402
Claws

— 9 —
3-3.TC MECHANISM DECK AND DECO BOARD (Except US, CND)
1 Push the buttons (EJECT) 4 and 5 .
1 Two screws
(+BVTP2.6x8)
2 Bracket (HP)
3 HP/MIC board
4 Knob (Vol)
5 Nut
6 Flat type wire
8 core : US, CND
10 core : Except : US, CND
7 Seven screws
(+BVTP2.6x8)
8 Nine screws
(+BVTP2.6x8)
9 Claws
0 Claws
!¡ Claws
!™ Claw
!£ Display board
!¢ Seven screws
(+BVTP2.6x8)
!∞ Claws
!§ TC SW board
!¶ Connector
(CN607)
3-4. HP/MIC BOARD, DISPLAY BOARD ANDTC SW BOARD
7 Cassette lid (B) assembly
4 Button (EJECT)
2 Three screws
(+BVTP2.6x8)
3 TC mechanism deck
8 DECO board
5 Button (EJECT)
6 Cassette lid (A)
assembly
Except US, CND
9 Flat type wire (5 core)
Claws
• Abbreviation
CND: Canadian model

— 10 —
3-5. DISC TRAY
(Perform after removing the front panel.)
1 Turn the cam to the
direction of arrow.
2 Pull-out the disc tray.
5 Remove the disc tray.
4 Two claws
3 Flat type wire (8 core)
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.
Claw
A
Claw B

— 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 SPECTRUM ANALYZER , ENTER/NEXT , and DISC 1 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 POWER button to turn the set ON.
2. Press PLAY MODE button and POWER 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 SPECTRUM ANALYZER , ENTER/NEXT , and DISC 2 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 SPECTRUMANALYZER , ENTER/NEXT , and FUNCTION 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 )button in CD section to 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 FUNCTION Name
• The FUNCTION name of external input terminal can be changed over toVIDEO or MD. With the FUNCTION selected to “MD”, about
5dB mute is applied to the input gain.
Procedure:
1. Press POWER button to turn the set OFF.
2. Press POWER button together with FUNCTION button, and the power is turned on, the display of fluorescent indicator tube changes
to “MD” or “VIDEO” instantaneously, and thus the FUNCTION is changed over.
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 POWER button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.
3. Press POWER button to turn the set OFF.
4. Press ENTER/NEXT and POWER 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 SPECTRUM ANALYZER , ENTER/NEXT , and DISC 3 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 1V0 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 operation check of CD section and tape deck section.
• If an error occurred:
The aging operation stops.
• If no error occurs:
The aging operation continues repeatedly.
1. Aging Mode in CD Section
1-1. Operating procedure of Aging Mode
1. Set discs in DISC 1 and DISC 2 trays.
2. Select the function “CD”.
3. Press three buttons SPECTRUM ANALYZER , ENTER/NEXT , and KARAOKE PON/MPX simultaneously.
4. The aging mode is activated, if a roulette mark on the fluorescent indicator tube is blinking.
5. In the aging mode, the aging is executed in a sequence given in “1-2. Operation duringAging Mode”.
The aging continues unless an alarm occurred.
6. To exit from the aging mode, press POWER button to turn the set OFF.
•If a button other than buttons In CD section is pressed during aging, the aging in the CD section is finished.
•To execute aging to the tape deck section successively, press ·button in the deck A.
“AGING” is displayed on the fluorescent indicator tube. (For the aging in tape deck, see “2. Aging Mode in Tape Deck Section”.
1-2. Operation during aging Mode
In the aging mode, the program is executed in the following sequence.
1. The disc table is ejected.
2. The disc tray turns to select a disc. (For a disc selection sequence, see Section 1-3.)
3. TOC of disc is read.
4. The pick-up accesses to the last track.
5. Disc table is ejected.
6. Steps 2 through 5 are repeated.
1-3. Disc Selection Sequence
•During the aging mode, discs are selected in the following sequence:
Disc 1 →Disc 2
↑↓
Disc 2 ←Disc 1
2. Aging Mode in Tape Deck Section
2-1. Operating procedure of Aging Mode
1. Load a commercially available 10-minute tape into the decks A and B respectively.
(If a 10-minute tape is not available, another tape may be used but a cycle time will be longer.)
2. Select the function “TAPE”.
3. Rewind tapes in advance by pressing 0button respectively on decks A and B.
4. Press three buttons SPECTRUM ANALYZER , ENTER/NEXT , and KARAOKE PON/MPX simultaneously.
5. Press ·button on deck A. (This button triggers the aging mode.)
6. The aging mode is activated if “AGING A” is displayed on the fluorescent indicator tube.
7. In the aging mode, the aging is executed in a sequence given in “2-2. Operation during Aging Mode”.
The aging continues unless an alarm occurred.
8. To exit from the aging mode, press POWER button to turn the set OFF.
2-2. Operation during Aging Mode
In the aging mode, the program is executed in the following sequence.
1. A tape on FWD side is played for one minute.
2. PAUSE STOP is made.
3. Recording is made for 3 minutes. (For the deck not having the record function, the play is executed. In this case, ·LED does not
light up.)
4. FF is executed up to the end of tape.
5. A tape is reversed, and the tape on REV side is played for one minute.
6. PAUSE STOP is made.
7. Recording is made for 3 minutes. (For the deck not having the record function, the play is executed. In this case, ªLED does not
light up.)
8. FF is executed up to the end of tape.
9. Steps 1 through 8 are executed for the other deck.
10. Steps 1 through 9 are repeated unless an alarm occurred.
2-3. Deck Selection Sequence
• During the aging mode, decks are selected in the following sequence:
Deck A (FWD) →Deck A (REV)
↑↓
Deck B (REV) ←Deck B (FWD)

— 13 —
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
2 to 6 g • cm
(0.02 - 0.08 oz • inch)
36 to 61 g • cm
(0.5 - 0.84 oz • inch)
Torque Torque meter
FWD
FWD
back tension
REV
FF/REW
REV
back tension
FWD tension
REV tension
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
2 to 6 g • cm
(0.02 - 0.08 oz • inch)
61 to 143 g • cm
(0.85 - 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 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.
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
set
test tape
P-4-A100
(10kHz, –10dB) main board
CN403
Pin
3 (L-CH)
Pin
1 (R-CH)
level meter
Signal Used forTape
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
P-4-A100
WS-48B
P-4-L300
SECTION 5
MECHANICAL ADJUSTMENTS
Meter reading
36 to 61 g • cm
(0.5 - 0.84 oz • inch)
–
+
main board
CN403
Pin
2 (GND)

— 14 —
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Playback Head (Deck A)
Record/Playback/Erase Head (Deck B)
45˚ 90˚ 135˚ 180˚
wronggood
in phase
Waveform of oscilloscope
output
level
L-CH
peak
screw
position
R-CH
peak
within
1dB within 1dB
L-CH
peak R-CH
peak
screw
position
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.
3. Mode: Playback
R
set
test tape
P-4-A100
(10kHz, –10dB)
main board
CN403
Pin
3 (L-CH) oscilloscope
Pin
2 (GND)
L
Pin
1 (R-CH)
Tape Speed Adjustment (Deck A)
Note: Set the test mode using the following method and begin tape
speed adjustment.
In the test mode, the tape will move at double speed while
the HIGH SPEED DUBBING button is pressed.
Procedure:
With the power turned ON, press the SPECTRUM ANALYZER
button, ENTER/NEXT button, and EFFECT ON/OFF button
simultaneously.
(The “VOLUME” on the fluorescent display tube will blink while
in the test mode.)
To exit the test mode, press the POWER button.
1. Load WS-48B into deck A and a recordable tape into deck B.
2. Press the rREC button, and press the ·button of deck B to
set deck B into the recording state.
3. Play deck A.
4. While pressing the HIGH SPEEDDUBBING button, set double
speed play.
5. Adjust RV652 of the AUDIO board so that the reading of the
frequency counter becomes 6000 ± 30 Hz.
6. Release the HIGH SPEED DUBBING button to set normal
speed play.
7. Adjust RV651 of the AUDIO board so that the reading of the
frequency counter becomes 3000 ± 15 Hz.
Adjustment Location: AUDIO board
Playback Level Adjustment (Deck A, Deck B)
Procedure:
Mode: Playback
set
test tape P-4-L300
(315Hz, 0dB)
main board
CN403 Pin
3 (L-CH)
Pin
1 (R-CH)
level meter
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:
CN403 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
foward
reverse

— 15 —
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.
1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Load a tape into deck B, and press the rREC button.
3. Mode: Record
set
VIDEO/MD (AUDIO) IN
1) 315Hz
2) 10kHz } 50 mV (–23.8 dB)
AF OSC
attenuator 600
Ω
blank tape
CS-123
recorded
position
main board
CN403 Pin
3 (L-CH)
Pin
1 (R-CH)
set
level meter
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
RV341(Lch),RV441(Rch)
Record Bias
RV301
RV401 RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV651 (Normal Speed)
RV652 (High Speed)
Tape Speed
RV652RV651
RV311
RV411
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
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
automatically switch to VIDEO.
1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Load a tape into deck B, and press the rREC button.
3. Mode: Record
VIDEO/MD (AUDIO) IN
315 Hz 50 mV (–23.8 dB)
set
blank tape
CS-123600
Ω
attenuator
AF OSC
4. Mode: Playback
level meter
set
main board
CN403 Pin
3 (L-CH)
Pin
1 (R-CH)
recorded
position
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)
RV301
Record Level (L CH)
IC401
RV351
Record Level
(R CH)
CN403
13
[MAIN BOARD] (Component Side)
4. Mode: Playback

— 16 —
Band: FM
Procedure:
1. Supply a 25 dB or 23 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
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
Note: FM Tuned Level adjustment should be performed after this
AM Tuned Level Adjustment.
Setting:
Band: MW
Procedure:
1. Set the output of SSG so that the input level of the set becomes
55 dB or 58 dB. (55 dB: Except East European, CIS model, 58
dB: East European, CIS model)
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
FMTuned Level Adjustment
Note: This adjustment should be performed after the AM Tuned
Level Adjustment.
Setting:
set
Carrier frequency: 98MHz
Modulation: AUDIO 1kHz, 75kHz
deviation (100%)
Output level: 25dB (at 75
Ω open) (Except East European, CIS model)
23dB (at 75
Ω open) (East European, CIS model)
FM RF SSG
loop antenna
Field strength dB (µV/m) = SSG output level dB (µV/m) –26dB.
AM RF SSG
30% amplitude
modulation by
400Hz signal
60cm AM antenna
terminal (TM1)
loop antenna
(Supplied accessories)
Modulation: 999 kHz (at 9 kHz step)
1,050 kHz (at 10 kHz step)
set
Adjustment Location
[TCB BOARD] (Component Side)
TM1
IC21
RV41
AM Tuned Level
RV42
FM Tuned
Level
75
Ω coaxial
FM ANTENNA terminal (TM1)

— 17 —
FM Polar Adjustment (East European, CIS model only)
Connection 1 :
FM RF SSG
FM antenna
terminal (75
Ω )
75
Ω coaxial
set
Carrier frequency: 69 MHz
Output level: 1 mV (60 dBµ) (at 75
Ω open)
Modulation: AUDIO 1 kHz, 10 kHz deviation
Connection 2 :
75 Ω coaxial
FM RF SSG
FM antenna
terminal (75
Ω )
AF OSC
Audio 31.25kHz external
modulation
terminal
Carrier frequency: 69 MHz
Output level: 1 mV (60 dBµ) (at 75
Ω 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
connectedtoTP1701 (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)
[TCB BOARD] (Component Side)
RV1701
Sub Carrier
Level
L1701
IC1701
RV1702
VCO
Sub Carrier Peak
CT1701
set
+
_
frequency counter
level meter
TP1701
(FILTER)
TP1702
(VCO)
IC1701
Adjustment Location: TCB board
Adjustment Location
[TCB BOARD] (Conductor Side)

— 18 —
CD SECTION
Note:
1. CD Block is basically constructed to operate without adjustment.
Therefore, check each item in order given.
2. UseYEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M impedance.
4. Clean the object lens byanapplicatorwith neutral detergentwhen
the signal level is low than specified value with the following
checks.
S Curve Check
E-F Balance (1Track Jump) check
oscilloscope
BD board
TP(TEO)
TP (VC)
Procedure:
1. Connect oscilloscope to test point TP (TEO) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the “P(Pause)” button.
5. Check the level B of the oscilloscope's waveform and theA (DC
voltage) of the center of the Traverse waveform.
Confirm the following:
• x 100 = less then ± 7 (%)
• A + B = 500 ± 100 mVp-p
A – B
2 (A + B)
1 track jump waveform
0V
B
A (DC voitage)
Symmetry
level : 500 mV ± 100 mVp-p
Adjustment Location:
[BD BOARD] (Conductor Side)
TP (RF)
TP
(FOK)
TP
(VC)
IC101
TP
(TEO)
TP
(FEO)
TP
(GND)
IC103
IC102
CN101
IC102
oscilloscope
BD board
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-
tweenA andB.And confirmpeak to peak levelwithin 3 ± 1Vp-p.
S-curve waveform
A
B
within 3 ± 1Vp-p
symmetry
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 timeas long as possible andlightup the bright-
ness to obtain best waveform.
RF Level Check
oscilloscope
BD board
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
level: 1.3 ± 0.3 Vp-p
VOLT/DIV: 200 mV
TIME/DIV: 500 nS
Center of the waveform

— 19 — — 20 —
DIAGRAMS
7-1.CIRCUIT BOARDS LOCATION
Note:pA is including in AUDIO board.
pB is including in PANEL board.
POWER board
AUDIO board
(including
p A)
LEAF SWITCH board
p A
MOTOR board
TRANS board SURROUND board
MOTOR (TURN) board
CONNECTOR board
SENSOR board
BD board
MOTOR (SLIDE) board
CD SW board
PANEL board
(including
p B)
HP/MIC board
TC SW board
MAIN board
p B
ENCAPSULATED COMPONENT
(Except AEP, UK, G, EE, CIS)
TCB board (AEP, UK, G, EE, CIS)
•Abbreviation
CND:Canadian model
G:German model
EE :East European model
DECO board
(Exept D90AV/RX100AV: US, CND)

— 21 — — 22 —
HCD-D90AV/GR10AV/RX100AV
7-2. BLOCK DIAGRAMS
—TUNER SECTION — (AEP, UK, German model)
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 11
30 14
RV42
21214 78
13
X42
450kHz
D41
FM SD
AM/FM
VCO STOP
IF BUFF
MUTE
AM
SD
AM
TUNED
LEVEL
12 RV41
2AM IF
IFT1 5
9
23
AM IF
DET
VCO
STEREO
TUNED 8
7
X43
456kHz
X41
10.7MHz
MUTE
STEREO
TUNED
24 22
AM/FM MPX IN 20
21
OUT L
OUT R
LPF
RCH
18 AMP IN L AMP
OUT
L16
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
64
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
• 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
IF REQ
XIN
XOUT
3
4
13 14
2
16
IC1751 RDS DECODER
IC1752
X1751
4.332MHz
57