Sony HCD-LX9AV User manual

HCD-LX9AV/LX10AV/LX90AV
US Model
HCD-LX90AV
AEP Model
UK Model
HCD-LX9AV
E Model
Australian Model
HCD-LX10AV
SERVICE MANUAL
COMPACT HI-FI STEREO SYSTEM
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol ;are trade-
marks of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism HCD-DR8AV/
W900AV
CD CD Mechanism Type CDM37M-5BD32L
Section Base Unit Name BU-5BD32L
Optical Pick-up Name KSS-213D/Q-NP
Model Name Using Similar Mechanism HCD-DR8AV/
Tape deck W900AV
Section Tape Transport Mechanism Type TCM-230PWR1
•HCD-LX9AV/LX10AV/LX90AV are the
Amplifier, CD player, Tape Deck adn Tuner
section in LBT-LX9AV/LX10AV/LX90AV
— Continued on next page —
SPECIFICATIONS
Photo: HCD-LX9AV
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-929-201-12
2002F1600-1
© 2002.06
Ver 1.1 2002. 06

2
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE WITH
MARK 0ON 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

3
TABLE OF CONTENTS
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Checktheantennaterminals, 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 return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage 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 a
VOM 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 passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2VAC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µ F1.5 k
Ω
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SECTION 1
SERVICE NOTES
1. SERVICING NOTES .................................................. 3
2. GENERAL ...................................................................... 5
3. DISASSEMBLY............................................................. 8
4. SERVICE MODE .......................................................... 12
5. MECHANICAL ADJUSTMENTS............................ 15
6. ELECTRICAL ADJUSTMENTS ............................. 15
7. DIAGRAMS
7-1. Circuit Board Locations.................................................... 20
7-2. Block Diagrams
Display/Power Section...................................................... 21
Main Section ..................................................................... 22
Display/Power Section...................................................... 23
7-3. Printed Wiring Board – BD Board –................................. 24
7-4. Schematic Diagram – BD Board – .................................. 25
7-5. Printed Wiring Boards – CD MOTOR Section –............. 26
7-6. Schematic Diagram – CD MOTOR Section –................. 27
7-7. Printed Wiring Board – AUDIO Board –......................... 28
7-8. Schematic Diagram – AUDIO Board – ........................... 29
7-9. Printed Wiring Board – LEAF SW Board – .................... 30
7-10.Schematic Diagram – LEAF SW Board – ....................... 30
7-11.Printed Wiring Board – MAIN Board – .......................... 31
7-12.Schematic Diagram – MAIN Board (1/3) – .................... 32
7-13.Schematic Diagram – MAIN Board (2/3) – .................... 33
7-14.Schematic Diagram – MAIN Board (3/3) – .................... 34
7-15.Printed Wiring Board – PANEL FL Board – ................... 36
7-16.Schematic Diagram – PANEL FL Board –...................... 37
7-17.Printed Wiring Board – PANEL VR Board – .................. 38
7-18.Schematic Diagram – PANEL VR Board – ..................... 39
7-19.Printed Wiring Boards – TC-A/TC-B/CD-L/
CD-L2/CD-R/CD-R2 Boards – ........................................ 40
7-20.Schematic Diagram – TC-A/TC-B/CD-L/
CD-L2/CD-R/CD-R2 Boards – ........................................ 41
7-21.Printed Wiring Boards – FRONT INPUT/
HEADPHONE/MIC Boards – .......................................... 42
7-22.Schematic Diagram – FRONT INPUT/
HEADPHONE/MIC Boards – .......................................... 43
7-23.Printed Wiring Board – PA Board – ................................ 44
7-24.Schematic Diagram – PA Board – ................................... 45
7-25.Printed Wiring Board – SURROUND Board – ............... 46
7-26.Schematic Diagram – SURROUND Board – .................. 47
7-27.Printed Wiring Boards
– TRANS/SUB TRANS Boards – ................................... 48
7-28.Schematic Diagram – TRANS/SUB TRANS Boards – .. 49
8. EXPLODED VIEWS ................................................... 55
9. ELECTRICAL PARTS LIST................................... 63

4
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.

5
1
234
56
8
0
9
qs
qd
7
qfqgqhqj
ql
w;
wa
ws
wd
wf
qa
qk
SECTION 2
GENERAL
LOCATION OF CONTROLS
–Front Panel –
Photo: HCD-LX9AV
1?/1(POWER) button
2DAILY button
REC button
SLEEP button
c/CLOCK SET button
3TUNER/BAND button
TUNING +/–button
ENTER/NEXT button
TUNER MEMORY button
STEREO/MONO button
TUNING MODE button
PTY button
4Display
5v/B/V/bbutton
6SYNC EQ button
SYNC BASS button
SURROUND button
MIX GUITAR/KARAOKE button
7FUNCTION button
8VOLUME control
9PHONES jack
0DECK B operating button
gbutton Gbutton xbutton
mbutton Mbutton Xbutton
zREC button HI SPEED DUB button
CD SYNC button
qa .AMS >control
qs CD operating button
GXbutton xbutton mbutton
Mbutton DISC SKIP button
qd VIDEO 2 INPUT jack
qf PLAY MODE button
REPEAT button
qg DECK B
qh ZA EJECT
ZB EJECT
qj DECK A
qk DISC1-5 button
ql LOOP button
FLASH button
NON-STOP button
EDIT button
w; SUPPER WOOFER MODE button
MIC LEVEL control
GUITAR LEVEL contro
wa DECK A operating button
gbutton Gbutton xbutton
mbutton Mbutton
DIRECTION button
DOLBY NR button
ws MIC MIX jack
GUITAR jackl
wd EFFECT button
GROOVE button
SUPER WOOFER button
wf POWER SAVE/DEMO (STAND BY) button
DISPLAY button
SPECTRUM ANALYZER button

6
1DJ MIX jack
2ANTENNA terminal
3SURROUND SPEAKER terminal
4FRONT SPEAKER terminal
5CD DIGITAL OUT terminal
6DVD INPUT FRONT jack
DVD INPUT REAR jack
DVD INPUT WOOFER jack
DVD INPUT CENTER jack
7DVD INPUT VIDEO jack
8VIDEO OUT jack
9VIDEO 1 jack
0MD IN/OUT jack
qa PHONO IN jack
qs WOOFER OUT jack
2
1
qa
qs
0
8
6
7
5
9
43
Photo: HCD-LX9AV
–Rear Panel –

7
This section is extracted
from instruction manual.

8
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. UPPER CASE
(BVTT 3 × 6)
5Upper case
3Four screws
(BVTP3 ×8
)
1Three screws
(CASE3 TP2)
4Three screws
2Three screws
(CASE3 TP2)
(Remove in the direction of the arrows)
3-2. FRONT PANEL SECTION
(BVTP3 × 8)
Connector
(CN802)
Two lugs
Claw
4 Two connectors
(CN452, 702)
Wire (flat type)
(15 core) (CN303)
Wire (flat type)
(17 core) (CN304)
Wire (flat type)
(13 core) (CN431)
7 Two screws
(BVTP3 ×8)
Lug
Front panel section
(Be careful in has claws)
1
2
3
0
9
8
Screw (BVTP3 × 8)
5
6
Screw
(BVTP3 × 8)
Four screws

9
3-3. TAPE MECHANISM DECK (TCM-230PWR1)
Two screws
(BVTP3 ×8)
Two screws
(BVTP3 ×8)
Tape mechanism deck
(TCM-230PWR1)
1
2
3
3-4. MAIN BOARD
qs Main board
6 Back panel
5 Eleven screws
(BVTP3 × 8)
7 Connector
(CN102)
8 Wire (flat type)
(19 core) (CN411)
9 Connector
(CN412)
qa Two connector
(CN803, CN804)
1 Wire (flat type) (CN441)
4 Five screws
(BVTP3 × 8)
3 Two screws
(BVTP3 × 8)
0 Two screws
(BVTP3 × 8)
2 Connector
(CN903)
LX10AV Model

10
3-5. CD MECHANISM DECK (CDM37M-5BD32L)
CD mechanism deck
(CDM37M-5BD32L)
9 Five screws
(BVTP3 × 8)
0 Two screws
(BVTP3 × 8)
qs Two screws
(BVTP3 × 8)
8 Connector
(CN412)
7 Wire (flat type)
(19 core) (CN411)
1 Wire (flat type) (CN441)
5 Eeven screws
(BVTP3 × 8)
4 Five screws
(BVTP3 × 8)
3 Two screws
(BVTP3 × 8)
2 Connector
(CN903)
qa Open the two
cable clamps
qd
1
Five screws
(BVTP3 × 8)
2
LX10AV Model
6

11
3-6. BASE UNIT (BU-5BD32L)
3Base unit
(BU-5BD32L)
1BU fitting screw
2Boss
3-7. DISC TABLE
Note: When the disc table is installed, adjust the positions of roller cam
and mark as shown in the figure, then set to the groove of disc
table.
1Two screws (BVTP3 ¥ 8)
A
2Two brackets (BU)
3Step screw
4Disc table
A

12
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 c/CLOCK SET , ENTER , and ?/1 simultaneously.
2. “COLD RESET” is displayed on the fluorescent display tube and reset is executed.
CD Delivery Mode
• This mode moves the pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Press LOOP button and ?/1 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 c/CLOCK SET , ENTER , and DISC 1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously, and the set is reset.
Sled Servo Mode
• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Press three buttons c/CLOCK SET , ENTER , and DISC 5 simultaneously.
3. The Sled Servo mode is selected, if “CD” is blanking on the fluorescent indicator tube.
4. With the CD in stop status, When the .AMS >knob is rotated in the clockwise direction, the pick-up moves outside. When
rotated counterclockwise, it moves inside.
5. To exit from this mode, perform as follows:
1) Move the pick-up to the most inside track.
2) Execute MC cold reset. (Press the three buttons c/CLOCK SET , ENTER , and ?/1 button simultaneously.)
Note:
• Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be chipped.
Change-over of AM Tuner Step between 9kHz and 10kHz (DR8AV Only)
• A step of AM channels can be changed over between 9kHz and 10kHz.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.
3. Press ?/1 button to turn the set OFF.
4. Press ENTER and ?/1 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 c/CLOCK SET , ENTER , 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 @ 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 .AMS >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.

13
AMS Test Mode
•This mode is used for checking the AMS operations of the tape deck.
JIG
7-819-039-12 Alignment tape, AMS-110A
Procedure:
1. Press the ?/1 button to turn the set ON.
2. Set the tape (AMS-110A).
3. Press the three buttons c/CLOCK SET , ENTER , and DISC 3 button simultaneously.
4. “TEST MODE”is displayed on the fluorescent display tube.
5. Press the FUNCTION button and switch the function to the deck with the tape (AMS-110A).
6. Press the CD SYNCHRO button. “AMS CHECK”is displayed on the fluorescent display tube and the tape is rewound.
7. AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8.
“NG”is displayed at other times, and the deck stops.
8. AMS starts in the opposite direction. If the AMS count is 2 at shut down again, “OK”is displayed.
“NG”is displayed at other times.
Aging Mode
During the aging mode, both the CD player and tape deck are executed together.
• If an error occurs:
Aging stops, and the error state is displayed on the fluorescent display tube.
• If no error occurs:
Aging is repeated.
Procedure:
1. Press the ?/1 button to turn the set ON.
2. Load 10 minute tapes with unbent rec-proof tabs in decks A and B.
3. Set CDs on the DISC 1 and DISC 4 tables.
4. Set the CD mode REPEAT to OFF and PLAY MODE to ALL DISCS.
(Press the PLAY MODE and REPEAT buttons to set these modes.)
5. Press the FUNCTION button to switch the function to “CD”.
6. Press the three buttons c/CLOCK SET , ENTER , and DISC 4 button simultaneously.
7. Aging starts.
8. To end aging, press the ?/1 button to turn the set OFF.
Aging Sequence:
Aging is performed in the following sequence.
• Tape Deck
1. The tape in deck A is rewound. “TAPE A AG-1”is displayed.
2. The FWD side of deck A is played for two minutes.
“TAPE A AG-2”is displayed.
3. The tape in deck A is fast forwarded. “TAPE A AG-3”is displayed. Fast forward is carried out for 20 seconds or to the tape end.
4. The RVS side of deck A is played for two minutes.
“TAPE A AG-4”is displayed.
5. The tape in deck A is rewound. “TAPE A AG-5”is displayed.
6. The FWD side of deck B is played for two minutes.
“TAPE B AG-2”is displayed.
7. The tape in deck B is fast forwarded. “TAPE B AG-3”is displayed. Fast forward is carried out for 20 seconds or to the tape end.
8. The RVS side of deck B is played for two minutes.
“TAPE B AG-4”is displayed.
9. The tape in deck A is rewound. “TAPE A AG-5”is displayed.
10. Repeated from step 2.
• CD
1. The tray rotates.
2. DISC 1 is chucked.
3. The TOC is read.
4. The first track is played for 2 seconds.
5. The last track is played for 2 seconds.
6. The tray rotates.
7. DISC 4 is chucked.
8. The TOC is read.
9. The first track is played for 2 seconds.
10. The last track is played for 2 seconds.
11. Repeated from step 1.

14
•Display when ended abnormally
When the tape deck is abnormal:
The state when ended abnormally is displayed.
The contents of display are the same as that during aging.
When the CD player is abnormal:
A message indicating that errors such as “CD MEC ERR”have occurred.
Check the error contents in the following error history display mode.
Error History Display Mode
Mode which enables the history of error occurring in the CD player to be checked.
Execute this mode after ending the aging mode.
Procedure:
1. Press the ?/1 button to turn the set ON.
2. Press the three buttons c/CLOCK SET , ENTER , and CD SYNCHRO simultaneously.
3. A message such as “EMC@@EDC**”is displayed.
@@ : Number of mechanical errors (Up to three past errors)
** : Number of errors (NO DISC ERROR) which occurs after chucking (Up to three past errors)
4. When checking the history of mechanical errors, press the PLAY MODE button. When checking errors after chucking, press the
REPEAT button to switch the display.
5. Press the ?/1 button to end and turn the set OFF.
6. To erase the error history, perform COLD reset.
(Press the three buttons c/CLOCK SET , ENTER , and DISC 1 simultaneously.
•Viewing the mechanical error history display
(Switch the history by pressing the PLAY MODE button.)
Display
E@@M#*****
@@ : Error number. 00 is the newest.
# : Operating state of table
0 : Currently in the INITIAL mode
7 : Currently rotating to the right
8 : Currently rotating to the left
A : Currently chucking down
B : Currently chucking up
* : Invalid
•Viewing the NO DISC ERROR history display
(Switch the history by pressing the REPEAT button.)
Display
E@@D##$$%*
@@ : Error number. 00 is the newest
## : Error contents
01: Focus error
02: GFS error
03: Setup error
$$ : Retries
00: NO DISC is determined without attempting chucking
retry
02: NO DISC is determined after chucking retry.
% : State when determined as NO DISC
1 : When stopped
2 : At setup
3 : At TOC READ
4 : When accessing
5 : When playing
6 : When pausing
7 : When manual searching (during play)
8 : When manual searching (during pausing)
* : Invalid

15
Precaution
1. Clean the following parts with a denatured alcohol-
moistened swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
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.
test tape
P-4-A100
(10kHz, –10dB) MD OUT level meter
set +
–
L-CH
peak
R-CH
peak
screw
position
output
level within
1 dB
L-CH
peak
R-CH
peak
screw
position
within 1dB
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
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
SECTION 5
MECHANICAL ADJUSTMENTS
DECK SECTION 0 dB=0.775V
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to
the parts adjusted.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given
in this service manual. (As a general rule, playback circuit
adjustment should be completed before performing
recording circuit adjustment.)
6. The adjustments should be performed for both L-CH and
R-CH.
7. Switches and controls should be set as follows unless
otherwise specified.
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
Tape Signal Used for
P-4-A100
WS-48B
P-4-L300
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment

16
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
Adjustment Location: Playback Head (Deck A)
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-SPEED DUB button is pressed.
Procedure:
With the power turned ON, press the c/CLOCK SET button,
ENTER 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 button.
1. Insert the WS-48B into deck B.
2. Press the Hbutton of deck B.
3. Press the HI-SPEED 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-SPEED 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
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]
test tape
P-4-A100
(10kHz, –10dB)
oscilloscope
set
Waveform of oscilloscope
in phase 45°90°135°180°
good wrong
MD OUT
test tape
P-4-L300
(315Hz, 0dB)
level meter
set
MD OUT
RV1002 RV1001
RV1002(Normal Speed
)
RV1001(High Speed)

17
Record Bias Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment,
when the tape is rewound after recording, the “REC memory
mode”which rewinds only the recorded portion and playback
is set.
This “REC memory mode”is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO 1.
(After recording, press the mbutton without stopping will
return to the position where recording was started.)
1. Press FUNCTION button to select VIDEO 1. (This step is
not necessary if the above test mode has already been set.)
2. Insert a tape into deck B, press the zREC button, and
then press the Hbutton to start recording.
3. Mode: Record
4. Mode: Playback
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
Record Level Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment ,
when the tape is rewound after recording, the “REC memory
mode”which rewinds only the recorded portion and playback
is set.
This “REC memory mode”is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO 1.
(After recording, press the mbutton without stopping will
return to the position where recording was started.)
1. Press FUNCTION button to select VIDEO 1. (This step is
not necessary if the above test mode has already been set.)
2. Insert a tape into deck B, press the zREC button, and
then press the Hbutton to start recording.
3. Mode: Record
4. Mode: Playback
5. Confirm playback the signal recorded in step 2 become
adjustment level as follows.
If these levels do not adjustment level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 3
and 4.
Adjustment level:
CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
5. Confirm playback the signal recorded in step 2 become
adjustment level as follows.
recorded
position
level meter
set
MD OUT
AF OSC
VIDEO 1 (AUDIO) IN
1) 315 Hz
2) 10 kHz
blank tape
CS-123
set
attenuator
600 Ω
} 50 mV (–23.8 dB)
AF OSC
VIDEO 1 (AUDIO) IN
315Hz 50 mV (–23.8 dB)
blank tape
CS-123
set
attenuator
600 Ω
recorded
position
level meter
set
MD OUT
Record Level (Lch)
RV301
RV351
Record Level (Rch)
IC30156
43 42
29
28
15
14
1
1
3
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
Adjustment Location:
[AUDIO BOARD] (Conductor Side) [MAIN 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 10MΩimpedance.
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
Procedure :
1. Connect the oscilloscope to test points TP (FE) and TP (VC).
2. Connect TP (FEI) and GND, and TP (AGCCON) and GND of
the BD board with lead wires.
3. Press the ?/1 button to turn the set ON.
4. With the disc (YEDS-18) loaded, press the HX button and
perform focus search. (Focus search will be performed in the
same way even while the disc table is pushed in and out.)
5. Check the symmetry and peak to peak level of the oscilloscope
waveform (S curve) at this time.
S-curve waveform
6. After check, remove the lead wire connected in step 2.
Note: •Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
•Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF Level Check
Procedure :
1. Connect oscilloscope to test point TP (RF) and TP (VC) on
BD board.
2. Connect TP (AGCCON) and GND of the BD board with lead
wires.
3. Press the ?/1 button to turn the set ON.
4. Put disc (YEDS-18) in and playback 5 track.
5. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
6. After check, remove the lead wire connected in step 2.
Adjustment Location :
[ BD BOARD ] — SIDE A —
Procedure:
1. Connect oscilloscope to test point TP (TE) on BD board.
2. Press the ?/1 button to turn the unit ON.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the HX button.
5. Check the level B of the oscilloscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following:
•A/B x 100 = less then ± 22 (%)
•B = 1.3 ± 0.6 Vp-p
1 track jump waveform
E-F Balance (1 Track Jump) check
oscilloscope
BD board
TP (FE)
TP (VC)
+
–
symmetry
A
B
Within 4 ±1 Vp-p
oscilloscope
BD board
TP (RF)
TP (VC)
+
–
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.45 ±0.25 Vp-p
0V
Center of the waveform
B
Symmetry
A (DC voitage)
level : 1.3 ±0.6 Vp-p
oscilloscope
BD board
TP (TE)
TP (VC)
+
–
TP
(VC)
TP
(RF)
TP
(TE) TP
(FE1)
TP (FE)
TP
(AGCCON)
Note: Clear RF signal waveform means that the shape “◊”can be
clearly distinguished at the center of the waveform.
RF signal waveform

19
SECTION 7
DIAGRAMS
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•f: internal component.
•b: Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
Note on Schematic Diagram:
•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 Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•2: nonflammable resistor.
•5: fusible resistor.
•C: panel designation.
•U: B+ Line.
•V: B–Line.
•H: adjustment for repair.
•Voltages are taken with a VOM (Input impedance 10 MΩ).
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 produc-
tion tolerances.
•Circled numbers refer to waveforms.
•Signal path.
F: TUNER (FM/AM)
E: PLAYBACK (DECK A)
d: PLAYBACK (DECK B)
G: RECORD
J: CD PLAY (ANALOG OUT)
c: CD PLAY (DIGITAL OUT)
N: MIC INPUT
•Abbreviation
AUS : Australian model
AR : Argentine model
EA : Saudi Arabia model
MY : Malaysia model
MX : Mexican model
SP : Singapore model
•Indication of transisitor.
C
B
These are omitted.
E
Q
B
These are omitted.
CE
Q
B
These are omitted.
CE
Q
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replace only with part number specified.

20
7-1. CIRCUIT BOARDS LOCATION
PANEL FL board
TRANS board
SUB TRANS board
TUNER UNIT (FM/AM)
MAIN board
PA board
HEADPHONE board
TC-B board
CD-R board FRONT INPUT board
CD-L board
TC-A board
MIC board
PANEL VR board
LEAF SW board TABLE SENSOR board
BD boar
d
AUDIO board
LED board
CD MOTOR board
SURROUND board