Sony HCD-XB8 User manual

— 1 —
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
MICROFILM
— Continued on next page —
HCD-XB8 is the tuner, deck, CD and
amplifier section in LBT-XB8AV.
Model Name Using Similar Mechanism HCD-D670AV/N555AV
CD Mechanism Type CDM37L-5BD29AL
Base Unit Type BU-5BD29AL
Optical Pick-up Type KSS-213D/Q-NP
Model Name Using Similar Mechanism HCD-D670AV/N555AV
Tape Transport Mechanism Type TCM-220WR2
CD
SECTION
TAPE
DECK
SECTION
SPECIFICATIONS
HCD-XB8
AEP Model
UK Model
E Model
Australian Model
PX Model
Photo : AEP model
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CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER PROD-
UCT MARKING is located on
the rear exterior.
This caution
label is located
inside the unit.
MODEL IDENTIFICATION
— BACK PANEL —
• Abbreviation
AUS: Australian model
AR : Argentine model
SAF: South Africa model
MX : Mexican model
EE : East European model
AEP, UK model
EE, CIS model
E, AR, SAF model
AUS model
PX model
MX model
MODEL PARTS No.
4-987-045-0
4-987-045-2
4-988-222-0
4-988-222-1
4-988-222-2
4-988-222-3
Parts No.
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TABLE OF CONTENTS
1. GENERAL .......................................................................... 4
2. DISASSEMBLY
2-1. Front Panel ........................................................................... 5
2-2. Main Board ........................................................................... 6
2-3. Tape Mechanism Deck.......................................................... 6
2-4. Cassette Lid Assembly .......................................................... 7
2-5. CD Lid assembly................................................................... 7
2-6. CD Mechanism Deck ............................................................ 8
2-7. Base Unit ............................................................................. 8
2-8. Disc Table ............................................................................. 8
3. SERVICE MODE ........................................................9
4. MECHANICAL ADJUSTMENTS .......................... 11
5. ELECTRICAL ADJUSTMENTS ............................... 11
6. DIAGRAMS
6-1. Circuit Boards Location ...................................................... 18
6-2. Brock Diagrams
• Tuner Section (AEP, UK model) ..................................... 19
• Tuner Section (East European, CIS model)..................... 21
• CD Section ....................................................................... 23
• Deck Section .................................................................... 25
• Main Section .................................................................... 27
• Power Section .................................................................. 29
6-3. Printed Wiring Board —CD Section —.............................. 31
6-4. Schematic Diagram — CD Section — ............................... 33
6-5. Printed Wiring Board
—Tuner (AEP, UK model) Section —................................ 36
6-6. Schematic Diagram
—Tuner (AEP, UK model) Section —................................ 37
6-7. Schematic Diagram
—Tuner (East European, CIS model) Section — ............... 39
6-8. Printed Wiring Board
—Tuner (East European, CIS model) Section — ............... 41
6-9. Printed Wiring Board — Main Section —.......................... 42
6-10. Schematic Diagram — Main Section — .......................... 45
6-11. Schematic Diagram — Deck Section —.......................... 49
6-12. Printed Wiring Board — Deck Section — ....................... 53
6-13. Schematic Diagram — Panel Section — ......................... 56
6-14. Printed Wiring Board — Panel Section —.......................59
6-15. Schematic Diagram — Power Section — ........................ 63
6-16. Printed Wiring Board — Power Section — ..................... 67
6-17. Schematic Diagram — CD Motor Section —.................. 70
6-18. Printed Wiring Board — CD Motor Section — ............... 71
6-19. IC Block Diagrams ........................................................... 73
6-20. IC Pin Functions ............................................................... 80
7. EXPLODED VIEWS
7-1. Case and Back Panel Section .............................................. 89
7-2. Front Panel Section 1 .......................................................... 90
7-3. Front Panel Section 2 .......................................................... 91
7-4. Chassis Section ................................................................... 92
7-5. TC Mechanism Section 1 (TCM-220WR2)........................93
7-6. TC Mechanism Section 2 (TCM-220WR2)........................94
7-7. TC Mechanism Section 3 (TCM-220WR2)........................95
7-8. CD Mechanism Section (CDM37L-5BD29AL) ................. 96
7-9. Base Unit Section (BU-5BD29AL) .................................... 97
8. ELECTRICAL PARTS LIST ........................................ 98
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 sectionadjustment” and check
that the S curve waveform is output three times.
SAFETY-RELATED COMPONENTWARNING !!
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.
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SECTION 1
GENERAL
Front Panel
1789!º !¡ !£
!¢
!∞ !§
@§
@¶
@•
@ª
#¡
#£
#¢ #™
!¶
2
3
4
6
@º @™@£ @¢
@¡
@∞
#∞
#§
#¶
#ª
$º
$¡ $¶ $ª
$•
$¢
$£
%¢
%∞
%§
%¶
!™
#º
$™
$§
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%º
%¡
%™
%£
^º
^¡
%ª
%•
^™ ^£
5
!•
!ª
#•
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LOCATION OF PARTS AND CONTROLS
$™ Deck B ª, ·button
$£ Deck B 0, )button
$¢ Deck B rREC button
$∞ Deck B Pbutton
$§ CD SYNC button
$¶ H SPEED DUB button
$• Deck B 6EJECT button
$ª 6OPEN button
%º CD ·button
%¡ CD pbutton
%™ CD Pbutton
%£ DISC SKIP button
%¢ DISC1-DISC5 buttons
%∞ NON-STOP button
%§ LOOP button
%¶ FLASH button
%• 1/ALL DISCS button
%ª PLAY MODE button
^º CD 0, )button
^¡ REPEAT button
^™ EDIT button
^£ ≠AMS ±dial
1POWER button
2REC button
3t/CLOCK SET button
4DAILY 1 button
5DAILY 2 button
6SLEEP button
7DISPLAY/DEMO button
8SPECTRUM ANALYZER button
9Display Window
!º ENTER/NEXT button
!¡ TUNER MEMORY button
!™ TUNING MODE button
!£ TUNER/BAND button
!¢ TUNING (+/-) button
!∞ PTY button
(AEP, UK)
!§ STEREO/MONO button
!¶ Equalizer indicators
!• MIC LEVEL knob
!ª MIC jack
@º DSP button
@¡ WAVE button
@™ PROLOGIC button
@£ KARAOKE PON/MPX button
@¢ P FILE MEMORY button
@∞ PHONES jack
@§ EFFECT button
@¶ FUNCTION button
@• GROOVE button
@ª VOLUME control
#º SUPER WOOFER button
#¡ GEQ control buttons
#™ GEQ CONTROL button
#£ SUPER W MODE button
#¢ ENTER button
#∞ Deck A ª, ·button
#§ Deck A pbutton
#¶ DIRECTION button
#• DOLBY NR button
#ª Deck A 0, )button
$º Deck A 6EJECT button
$¡ Deck B pbutton
SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-1. FRONT PANEL
1 Three flat type wires
(CN401, CN402, CN701)
3 Front panel
2 Four screws (BVTP3x8)
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2-2. MAIN BOARD
2-3.TAPE MECHANISM DECK
1 Push the two buttons.
2 Open the cassette lids.
3 Three screws
(BVTP2.6x8)
4 Three screws (BVTP2.6x8)
5 Remove the tape mechanism deck
section to direction of the arrow
A .
A
1
Flat type wire (CN1)
2 Twelve screws (BVTP3x8)
5 Flat type wire (CN801)
6 Connector (CN830)
8 Two screws (BVTP3x8)
9 Connector (CN901)
!¡ Main board
!™ Connector (CN961)
3 Power cord
4 Back panel
7 Connector
(CN601)
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2-4. CASSETTE LID ASSEMBLY
1 Two springs
2 Two screws (BVTP2.6x8)
3 Two bracket
4 Cassette lid assembly
2-5. CD LID ASSEMBLY
1 Four screws (BVTP2.6x8)
3 Connector (CN661)
4 CD lid assembly
2 Connector (CN671)
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2-6. CD MECHANISM DECK 2-7. BASE UNIT
2 CD mechanism
deck
1 Five screws
(BVTP3x8)
3 Bass unit
2 Boss
1 Yoke bracket
2-8. DISCTABLE
1 Screw (BVTP3x8)
2 Screw (BVTP3x8)
3 Bracket (BU)
4 Stop screw
5 Disc table
A
A
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.
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SECTION 3
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 , 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 , 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 SPECTRUM ANALYZER , ENTER , 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 , 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.
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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 3 trays.
2. Select the function “CD”.
3. Press three buttons SPECTRUM ANALYZER , ENTER , 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 tray turns to select a disc. (For a disc selection sequence, see Section 1-3.)
2. TOC of disc is read.
3. The pick-up accesses to the last track.
4. Steps 1 through 3 are repeated.
1-3. Disc Selection Sequence
•During the aging mode, discs are selected in the following sequence:
Disc 1 →Disc 3
↑↓
Disc 3 ←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 , 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.)
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.)
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)
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SECTION 4
MECHANICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagne-
tizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
Torque Measurement
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
36 to 61 g • cm
(0.5 - 0.84 oz • inch)
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)
Meter reading
SECTION 5
ELECTRICAL ADJUSTMENTS
DECK SECTION 0 dB=0.775V
1. Demagnetize the record/playbackhead with a head damagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjusted.
4. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit adjust-
ment.)
6. The adjustments should be performed for both L-CH and R-CH.
7. Switches and controls should be set as follows unless otherwise
specified.
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
main board
CN403
Pin
2 (GND)
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
+
–
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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
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
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 H SPEED DUB. button is pressed.
Procedure :
With the power turned ON, press the SPECTRUM ANALYZER
button, ENTER button, and EFFECT 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 deckA 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 H SPEED DUB. 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 H SPEED DUB. 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
output
level
L-CH
peak
screw
position
R-CH
peak
within
1dB within 1dB
L-CH
peak R-CH
peak
screw
position
R
reverse
forward
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
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Record Bias Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjust-
ment,when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this ad-
justment. During recording, the input signal FUNCTION will auto-
matically switch to VIDEO.
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 (AUDIO) IN
1) 315Hz
2) 10kHz } 50 mV (–23.8 dB)
AF OSC
attenuator 600
Ω
blank tape
CS-123
4. Mode: Playback
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 ± 0.5 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 (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)
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TUNER SECTION 0dB=1µV
Note 1: As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
Note 2: No adjustment is needed due to a tuner pack for except
AEP, UK, 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:
Band: FM
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
TM1
IC21
RV41
AM Tuned Level
RV42
FM Tuned
Level
Adjustment Location
[TCB BOARD] (Component Side)
FM RF SSG
set
FM ANTENNA terminal
(TM1)
75
Ω coaxial
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)
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
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— 15 —
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.(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)
Adjustment Location
[TCB BOARD] (Conductor Side) [TCB BOARD] (Component Side)
+
_
frequency counter
level meter
TP1701
(FILTER)
TP1702
(VCO)
IC1701
set
IC1701
RV1702
VCO
RV1701
Sub Carrier
Level
CT1701
L1701 Sub Carrier Peak
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— 16 —
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 byanapplicator with neutral detergent when
the signal level is low than specified value with the following
checks.
S Curve Check
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 VOLT/DIV: 200 mV
TIME/DIV: 500 nS
level: 1.3 ± 0.3 Vp-p
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 and B.And confirmpeaktopeak levelwithin3± 1Vp-p.
S-curve waveform
within 3 ± 1 Vp-p
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.
• Takesweeptime as long aspossibleand light up the bright-
ness to obtain best waveform.
symmetry
B
A
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SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
PANEL board
TRANS board
SURROUND board
MAIN board
POWER board
CD-B1 SW board
CD-B2 SW board
TC-B SW board
DOOR SW board
CD-LED board
TC-A SW board
HP/MIC board
LEAF SWITCH board
BD board
LED board
CD MOTOR board
TABLE SENSOR board
— 17 — — 18 —
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
Center of the waveform
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
CD-A SW board
TCB board (AEP, UK, East European, CIS)
FM/AM TUNER PACK
(ENCAPSLATED COMPONENT)
(EXCEPTAEP, UK,EastEuropean,
CIS)
AUDIO board
(including
p A)
p A
MOTOR board
Note: pA is including in AUDIO board.
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— 19 — — 20 —
HCD-XB8
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 27)
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
6-2. BLOCK DIAGRAMS
—TUNER SECTION — (AEP, UK model)
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— 21 — — 22 —
HCD-XB8
22 MPX IN 20OUT L LPF 18 AMP
IN
L AMP
OUT
L16
4
5
3
6
ST-CE
COM-DIN
COM-CLK
COM-CLK
A
MAIN
SECTION
CE
DI
CL
DO
• R CH: Same as L ch
• SIGNAL PATH
: FM
: MW
D42 D43
13
LW/SW
SUB CARRIER
PEAK
L1701CT1701 TP1701 2
3
20
RV1701
SUB CARRIER
LEVEL
7
6
910
POLAR
DECODER
IC1701
IN
POUT
L OUT
R OUT
SUB IN
MON
VCO
ST IND
VCO
STOP
18 17
R CH
3
5
POLAR/PILOT
SWITCH
IC1702
4
9 11
C0
C1
C. COM
CA
A. COM 14 R CH
SWITCH
Q1701
SWITCH
Q1702 SWITCH Q1703
D1704
D1703
D1701
D1702
ST-L
STEREO
TUNED
MUTE
TP1702 RV1702
VCO
(Page 27)
TM1
AM
ANTENNA
FM 75Ω
COAXIAL ANT IN
ST +10V
Q5
VT
FE1
FM FRONT END
IF OUT
CF1
10.7MHz IF AMP
Q1-4
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
24
AM/FM
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
FM
VT1
MW
MW
AM OSC
FM
VCO STOP
FM/AM IF
IF REQ
XIN
XOUT
3
—TUNER SECTION — (East European, CIS model)
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— 23 — — 24 —
HCD-XB8
— CD SECTION —
• R CH: Same as L ch
• SIGNAL PATH
: CD
M
OPTICAL PICK-UP BLOCK
DETECTOR KB+
A
D
C
B
E
F
AD
C
B
1
4
2
5
10
6
38
39
41
42
2
1
45
47
LD DRIVE
Q101 36
37
LD
PD
XRST
FOK
23
27
FOCUS/TRACKING SERVO.
RF AMP
IC101 (1/2)
6
7
12
13
20
22
21
26
25
24
33
19
44
14
15
PD1
PD2
F
E
FEI
FEO
TEO
TEI
CLK
XLT
DATA
TA O
TA M
FE M
FE O
SENS2
SENS1
C.OUT
LOCK
RF O
27 23
15 16 17 10 11 12 75 879 100
93
86
89 • 90
X101
16.9344MHz
XTAI
•
XTAO
LOUT1
LOUT2
XRST
SCOR SQSO
SQCK
SENS
DATA
XLAT
CLOK
DIGITAL SIGNAL PROCESSOR
IC103
RF
29 LOCK
CNIN
SEIN
DATAO
XLTO
CLKO
MDP
FOK
21
S101
LIMIT
SPOD
9
LASER
DIODE
TRACKING
COIL DRIVE 27
15
16
FOCUS/TRACKING
COIL DRIVE
IC102 (1/2)
FOCUS
COIL DRIVE 26
18
17
2-AXIS
DEVICE
TRACKING
COIL
FOCUS
COIL T+
F+
T–
F–
SLED
SERVO
IC101 (2/2)
SLED/SPINDLE
MOTOR DRIVE
IC102 (2/2)
1416
6
SLED MOTOR
DRIVE
11
•
12
M
M102
SLED MOTOR
SPINDLE MOTOR
DRIVE 3
13
•
14
M
M101
SPINDLE
MOTOR
SL O SL P
CD CLK
CD DATA
SENS2
SCOR
SQ DATA
SQ CLK
SENS
XRST
XLAT
S201
UP SW
09
L-CH
R-CH
C
MAIN
SECTION
MUTE
7
39
1
M201
TABLE
MOTOR
OUT1
OUT2 IN1
IN2
MOTOR DRIVER
IC201
TBL.L
TBL.R
UP SW
(Page 27)
DISC
TABLE
SENSOR
IC202 T.SENS
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