Sony HCD-XB8 User Manual
HCD-XB8
SERVICE MANUAL
HCD-XB8 is the tuner, deck, CD and
amplifier section in LBT-XB8AV.
Photo : AEP model
CD
SECTION
TAPE
DECK
SECTION
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
AEP Model
UK Model
E Model
Australian Model
PX Model
SPECIFICATIONS
— Continued on next page —
MICROFILM
COMPACT DISC DECK RECEIVER
— 1 —
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation 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.
MODEL IDENTIFICATION
— BACK PANEL —
Parts No.
• Abbreviation
AUS: Australian model
AR : Argentine model
SAF: South Africa model
MX : Mexican model
EE : East European model
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 PRODUCT MARKING is located on
the rear exterior.
This caution
label is located
inside the unit.
— 2 —
MODEL
AEP, UK model
EE, CIS model
E, AR, SAF model
AUS model
PX model
MX 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
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repain parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
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
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 pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output three times.
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
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED 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.
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
— 3 —
Front Panel
SECTION 1
GENERAL
2
3
4
5
6
!•
!ª
@¡
@∞
#∞
#§
1
7
8
!¶
@º @™@£ @¢
#¢
9
#™
!¡ !£
!º
@§
#¡
!™
@•
!∞
!¢
!§
@¶
@ª
#º
#£
$™
$£
#¶
#•
$º
%¢
%∞
%§
#ª
$¡
$¶
%•
$¢
$∞
$§
$•
$ª
%º
%¡
%™
%£
^º
%ª
^¡
%¶
^™ ^£
— 4 —
LOCATION OF PARTS AND CONTROLS
1 POWER button
2 REC button
3 t/CLOCK SET button
4 DAILY 1 button
5 DAILY 2 button
6 SLEEP button
7 DISPLAY/DEMO button
8 SPECTRUM ANALYZER button
9 Display 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 p button
#¶ DIRECTION button
#• DOLBY NR button
#ª Deck A 0, ) button
$º Deck A 6 EJECT button
$¡ Deck B p button
SECTION 2
DISASSEMBLY
$™ Deck B ª, · button
$£ Deck B 0, ) button
$¢ Deck B r REC button
$∞ Deck B P button
$§ CD SYNC button
$¶ H SPEED DUB button
$• Deck B 6 EJECT button
$ª 6 OPEN button
%º CD · button
%¡ CD p button
%™ CD P button
%£ 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
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)
— 5 —
2-2. MAIN BOARD
7
Connector
(CN601)
3
Power cord
4
Back panel
2
Twelve screws (BVTP3x8)
Flat type wire (CN1)
1
!¡
6
Main board
!™
Connector (CN961)
Connector (CN830)
2-3. TAPE MECHANISM DECK
3
Three screws
(BVTP2.6x8)
5
Flat type wire (CN801)
A
4
Three screws (BVTP2.6x8)
5
Remove the tape mechanism deck
section to direction of the arrow
9
Connector (CN901)
8
Two screws (BVTP3x8)
A
2
.
Open the cassette lids.
1
Push the two buttons.
— 6 —
2-4. CASSETTE LID ASSEMBLY
1
Two springs
4
Cassette lid assembly
3
Two bracket
2
Two screws (BVTP2.6x8)
2-5. CD LID ASSEMBLY
2
Connector (CN671)
1
Four screws (BVTP2.6x8)
3
Connector (CN661)
4
CD lid assembly
— 7 —
2-6. CD MECHANISM DECK
1
Five screws
(BVTP3x8)
2
CD mechanism
deck
2-7. BASE UNIT
2
Boss
1
Yoke bracket
3
Bass unit
2-8. 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.
A
2
Screw (BVTP3x8)
3
Bracket (BU)
1
Screw (BVTP3x8)
4
Stop screw
5
Disc table
— 8 —
A
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 po wer 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 0 button to inside track.
5. To exit from this mode, perform as follows:
1) Move the pick-up to the most inside track.
2) Press three buttons in the same manner as step 2.
Note:
• Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be chipped.
Change-over of FUNCTION Name
• The FUNCTION name of external input terminal can be changed over to VIDEO 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 AM Tuner 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 Indicator Tube 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 1 V0 J0”. Each time a b utton is pressed, “K”value increases. Ho we ver ,
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.
— 9 —
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 during Aging 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 0 button 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)
— 10 —
SECTION 4
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL 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 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
Torque
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
36 to 61 g • cm
(0.5 - 0.84 oz • inch)
2 to 6 g • cm
(0.02 - 0.08 oz • inch)
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)
DECK SECTION 0 dB=0.775V
1. Demagnetize the record/playback head with a head damagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjusted.
4. The adjustments should be performed with the rated power 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.
Signal
P-4-A100
WS-48B
P-4-L300
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
test tape
P-4-A100
(10kHz, –10dB)
main board
CN403
Pin
3
(L-CH)
Pin
1
(R-CH)
Used forTape
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment
level meter
set
main board
CN403
Pin
2
(GND)
+
–
— 11 —
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.
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.
L-CH
peak
R-CH
screw
position
peak
3. Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
output
level
within
1dB
L-CH
peak
main board
CN403
Pin
3
(L-CH)
L
set
R
Pin
1
(R-CH)
Waveform of oscilloscope
Pin
2
(GND)
R-CH
peak
oscilloscope
within 1dB
screw
position
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 deck A and a recordable tape into deck B.
2. Press the r REC 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
test tape P-4-L300
(315Hz, 0dB)
set
level meter
in phase
45˚
90˚
135˚ 180˚
wronggood
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Playback Head (Deck A)
Record/Playback/Erase Head (Deck B)
reverse
forward
main board
CN403 Pin
Pin
3
(L-CH)
1
(R-CH)
Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301
(L-CH) and RV401 (R-CH)
so that adjustment within the following adjustment level.
Adjustment level:
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
— 12 —
Record Bias Adjustment (Deck B)
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. 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 r REC button.
3. Mode: Record
VIDEO (AUDIO) IN
1) 315Hz
2) 10kHz
AF OSC
attenuator
} 50 mV (–23.8 dB)
Ω
600
blank tape
CS-123
set
4. Mode: Playback
recorded
position
level meter
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. 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 r REC button.
3. Mode: Record
VIDEO (AUDIO) IN
315 Hz 50 mV (–23.8 dB)
AF OSC
attenuator
Ω
set
blank tape
CS-123600
4. Mode: Playback
recorded
position
level meter
set
main board
CN403 Pin
Pin
3
(L-CH)
1
(R-CH)
5. Confirm playback the signal recorded in step 2 become adjustment level as follows.
If these levels do not adjustment level, adjust the RV341 (LCH) and RV441 (R-CH) on the AUDIO board to repeat steps 3
and 4.
Adjustment level: The playback output of 10 kHz le vel dif ference
against 315 Hz reference should be ± 0.5 dB.
Adjustment Location: AUDIO board
Adjustment Location
[AUDIO BOARD] (Conductor Side)
RV341(Lch),R V441(Rch)
Record Bias
RV301
RV401
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV651 (Normal Speed)
RV652 (High Speed)
Tape Speed
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
RV652RV651
RV311
RV411
set
main board
CN403 Pin
Pin
3
(L-CH)
1
(R-CH)
5. Confirm playback the signal recorded in step 2 become adjustment level as follows.
If these levels do not adjustment level, adjust the RV301 (LCH) 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
RV301
[MAIN BOARD] (Component Side)
Record Level (L CH)
13
CN403
IC401
RV351
Record Level
(R CH)
— 13 —
TUNER SECTION 0dB=1µV
Note 1: As a front-end (FE1) is diff icult 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.
AM Tuned Level Adjustment
Note: FM Tuned Level adjustment should be performed after this
AM Tuned Level Adjustment.
Setting:
Band: MW
loop antenna
AM RF SSG
loop antenna
(Supplied accessories)
set
30% amplitude
modulation by
400Hz signal
Modulation: 999 kHz (at 9 kHz step)
1,050 kHz (at 10 kHz step)
Field strength dB (µV/m) = SSG output level dB (µV/m) –26dB.
60cm
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 R V41 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
FM Tuned Level Adjustment
Note: This adjustment should be performed after the AM Tuned
Level Adjustment.
Setting:
Band: FM
FM RF SSG
75
Ω
coaxial
AM antenna
terminal (TM1)
Adjustment Location
[TCB BOARD] (Component Side)
TM1
RV41
AM Tuned Level
RV42
FM T uned
Level
IC21
set
Carrier frequency: 98MHz
Modulation: AUDIO 1kHz, 75kHz
Output level: 25dB (at 75
deviation (100%)
(EXCEPT East European, CIS model)
23dB (at 75
(East European, CIS model)
Ω
open)
Ω
open)
FM ANTENNA terminal
(TM1)
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
— 14 —
FM Polar Adjustment (East European, CIS model only)
Connection 1 :
FM RF SSG
Carrier frequency: 69 MHz
Output level: 1 mV (60 dBµ) (at 75
Modulation: AUDIO 1 kHz, 10 kHz deviation
75
Ω
coaxial
FM antenna
terminal (75
Ω
open)
set
Ω
)
Connection 2 :
AF OSC
FM RF SSG
75 Ω coaxial
set
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 connected 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 connected to TP1701 (FILTER) becomes maximum.
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 (FIL TER) becomes maximum. (SUB CARRIER 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 CARRIER LEVEL Adjustment)
Audio 31.25kHz
Carrier frequency: 69 MHz
Output level: 1 mV (60 dBµ) (at 75
Modulation: AUDIO 31.25 kHz, 10 kHz deviation
external
modulation
terminal
(EXTERNAL MODULATION)
Ω
open)
FM antenna
terminal (75
Adjustment Location
[TCB BOARD] (Conductor Side)
frequency counter
+
_
level meter
TP1701
(FILTER)
IC1701
Ω
)
[TCB BOARD] (Component Side)
L1701
CT1701
RV1701
Sub Carrier
Level
IC1701
Sub Carrier Peak
TP1702
(VCO)
RV1702
VCO
— 15 —
CD SECTION
RF Level Check
Note:
1. CD Block is basically constructed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M impedance.
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
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 between A and B. And confirm peak to peak le vel within 3 ± 1Vp-p.
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 signal 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
S-curve waveform
symmetry
A
B
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.
• T ake sweep time as long as possible and light up the brightness to obtain best waveform.
— 16 —
E-F Balance (1 Track Jump) check
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 the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following:
A – B
• x 100 = less then ± 7 (%)
2 (A + B)
oscilloscope
• A + B = 500 ± 100 mVp-p
1 track jump waveform
0V
level : 500 mV ± 100 mVp-p
Center of the waveform
B
A (DC voitage)
Symmetry
Adjustment Location:
[BD BOARD] (Conductor Side)
CN101
TP
(GND)
TP
(TEO)
IC103
TP (RF)
TP
(FEO)
IC101
TP
(FOK)
TP
(VC)
IC102
6-1. CIRCUIT BOARDS LOCATION
PANEL board
HP/MIC board
TC-A SW board
CD-LED board
CD-A SW board
DOOR SW board
TC-B SW board
Note: pA is including in AUDIO board.
AUDIO board
p
(including
TABLE SENSOR board
A)
SECTION 6
DIAGRAMS
CD-B2 SW board
TRANS board
CD-B1 SW board
p
A
MOTOR board
TCB board (AEP, UK, East European, CIS)
FM/AM TUNER PACK
(ENCAPSLATED COMPONENT)
(EXCEPT AEP , UK, East European,
CIS)
SURROUND board
MAIN board
POWER board
LEAF SWITCH board
BD board
IC102
— 17 —
CD MOTOR board
LED board
— 18 —
HCD-XB8
6-2. BLOCK DIAGRAMS
— TUNER SECTION — (AEP, UK model)
TM1
ANTENNA
FM 75Ω
COAXIAL
AM
ST +10V
Q5
FE1
FM FRONT END
ANT IN
VT
1710
FM
VT1
09
IF OUT
LW SW
Q13
MW
SW
9
MW
6
5
3
2
26 25 24 23 22 21
Q14
CF1
10.7MHz
FE2
MW/LW FRONTEND
Q12
MW
SW
29
27
4
10.7MHz
REG
AM OSC
AM RF IN
FM SD
30 14
AM OSC
CF3
7
AM/FM
15
2
FM
AM MIX
IF BUFF
VCO STOP
11
1214
8
FM/AM IF
VCO STOP
MUTE
IF REQ
1 FM IN
AM
SD
AM
SD
D41
FM/AM MPX
IC41
2
12
RV41
13
X42
450kHz
1 24
AM
TUNED
LEVEL
XIN
AM IF
IFT1
XOUT
X21
4.5MHz
X41
10.7MHz
X43
456kHz
5
9
23
AM IF
DET
VCO
24 22
AM/FM
8
STEREO
7
TUNED
3 ST-CE
CE
4
DI
5
CL
DO
6
OUT L
MPX IN
OUT R
IC1751
ST L
RDS INT
RDS DATA
STEREO
TUNED
MUTE
COM-DIN
COM-CLK
COM-DATA
4
57
20
LPF
RCH
21
RDS DECODER
IC1752
13 14
X1751
4.332MHz
MAIN
SECTION
(Page 27)
A
• R CH: Same as L ch
• SIGNAL PATH
: FM
: MW
16
18
2
AMP IN L
AMP
OUT
16
L
IF AMP
Q1, 2
12
13
14
15
16
20
PLL
IC21
17
Q11
MW
SW
LW SW
Q9
11
IF AMP
Q3, 4
RV42
FM
TUNED
LEVEL
MW
CF2
10.7MHz
— 19 —
— 20 —
— TUNER SECTION — (East European, CIS model)
ST +10V
HCD-XB8
TM1
ANTENNA
FM 75Ω
COAXIAL
Q5
ANT IN
AM
09
VT
1710
FM
VT1
9
MW
FE1
FM FRONT END
IF OUT
Q13
MW
SW
6
5
3
2
26 25 24 23 22 21
Q14
LW SW
CF1
10.7MHz
FE2
MW/LW FRONTEND
Q12
MW
SW
IF AMP
Q1-4
12
LW SW
Q9
13
14
15
16
20
PLL
IC21
17
Q11
MW
SW
11
4
REG
29
AM OSC
27
AM RF IN
FM SD
30 14
RV42
FM
TUNED
LEVEL
MW
AM OSC
7
AM/FM
15
2
FM
AM MIX
IF BUFF
VCO STOP
11
1214
8
FM/AM IF
VCO STOP
1 FM IN
FM/AM MPX
AM
SD
AM
MUTE
SD
D41
IF REQ
24
AM/FM
IC41
AM IF
2
12
RV41
TUNED
LEVEL
13
X42
450kHz
1 24
XIN
5
AM IF
IFT1
X41
10.7MHz
AM
456kHz
X21
4.5MHz
XOUT
STEREO
9
DET
TUNED
VCO
23
X43
D42 D43
13
LW/SW
MPX IN
22
SUB CARRIER
PEAK
L1701CT1701
TP1701
CE
DI
CL
DO
RV1701
SUB CARRIER
LEVEL
3
4
5
6
8
7
POLAR
DECODER
IC1701
2
IN
L OUT
3
POUT
R OUT
MON
SUB IN
20
18 17
TP1702
VCO
VCO
RV1702
20OUT L
POLAR/PILOT
SWITCH
IC1702
C0
5
C. COM
CA
9 11
Q1702
D1704
A. COM
D1701
D1702
4
14
SWITCH
R CH
Q1703
D1703
ST IND
910
C1
3
VCO
STOP
SWITCH
7
6
R CH
LPF 18
SWITCH
Q1701
AMP
AMP
IN
16
OUT
L
L
• R CH: Same as L ch
• SIGNAL PATH
: FM
: MW
ST-L
STEREO
TUNED
MUTE
ST-CE
COM-DIN
COM-CLK
COM-CLK
A
MAIN
SECTION
(Page 27)
CF3
10.7MHz
— 21 —
— 22 —
HCD-XB8
— CD SECTION —
OPTICAL PICK-UP BLOCK
DETECTOR
E
A
B
LASER
DIODE
M102
M
SLED MOTOR
M101
M
SPINDLE
MOTOR
09
X101
FOCUS/TRACKING SERVO.
RF AMP
15
16
18
17
IC101 (1/2)
38
PD1
39
PD2
41
F
42
E
2
FEI
1
FEO
TEO
45
47
TEI
3637LD
PD
TRACKING
COIL DRIVE
FOCUS/TRACKING
COIL DRIVE
IC102 (1/2)
COIL DRIVE
IC101 (2/2)
SL O
XRST
23
MUTE
FOCUS
SLED
SERVO
RF O
LOCK
C.OUT
SENS1
SENS2
FE M
TA M
DATA
9
FE O
TA O
CLK
33
19
24
25
26
6
7
12
13
22
21
XLT
20
27
FOK
27
26
1416
SL P
RF
44
LOCK
29
14
CNIN
15
SEIN
DATAO
CLKO
FOK
XLTO
MDP
23
15 16 17
27
DIGITAL SIGNAL PROCESSOR
SPOD
21
S101
LIMIT
IC103
CLOK
XLAT
DATA
10 11 12 75
M201
TABLE
MOTOR
SQCK
SCOR
SQSO
8
79 100
M
SENS
7
3
MOTOR DRIVER
OUT1
OUT2
IC201
XRST
DISC
TABLE
SENSOR
IC202
9
IN1
1
IN2
B+
K
TRACKING
COIL
2-AXIS
DEVICE
SLED/SPINDLE
MOTOR DRIVE
IC102 (2/2)
SLED MOTOR
DRIVE
1
4
2
5
10
6
LD DRIVE
Q101
T+
–
T
–
F
F+
6
A
D
D
C
C
B
F
FOCUS
COIL
11
•
12
16.9344MHz
89 • 90
•
XTAI
XTAO
86
LOUT1
LOUT2
93
S201
UP SW
• R CH: Same as L ch
L-CH
R-CH
CD CLK
CD DATA
SENS2
SCOR
SQ DATA
SQ CLK
SENS
XRST
XLAT
UP SW
T.SENS
TBL.L
TBL.R
C
MAIN
SECTION
(Page 27)
• SIGNAL PATH
: CD
13
14
•
SPINDLE MOTOR
DRIVE
3
— 23 —
— 24 —
— DECK SECTION —
HCD-XB8
HP101
PB HEAD
(DECK A)
REC/PB HEAD
(DECK B)
HRPE101
ERASE HEAD
S1008
S1004
B CrO
2
DOLBY NR
RECOUT
NORM
24 25
15
B 120/70
BIAS SW
CROM
2
PAS
DOL
M1
CAPSTAN
MOTOR
DOLBY
TYPE B
CN403
3
R CH
1
PB OUT
8
LM ON/
20
OFF
NORM/
14
HIGH
NR ON/
18
OFF
19
PB
RIN
6
BIAS ON/OFF
16
17
RM ON/OFF
CAP M SWITCH
Q405, 407
SPEED
RV651
NORMAL
SPEED
CONTROL
Q651
RV652
HIGH
SPEED
M
+5V
S1003
(A HALF)
SWITCH
Q406
REEL
DETECT
Q1001
REEL
DETECT
Q1002
S1001 (A PLAY)
S1002 (B PLAY)
+5V
A CrO
RV311
RV301
PLAYBACK
IC601
DECK B
1
IC602
R
4
REC/PB
• R CH : Same as L ch
• SIGNAL PATH
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
PLAYBACK
LEVEL
DECK A
LEVEL
RV341
REC
BIAS
REC BIAS
T621, Q621, 622
IC611
L
R
L
R
R CH
R CH
3
P
ERASE BIAS
X
BIAS OSC
12
PB-A/B
A IN
2
B IN
4
+7.5V
Q623, 901
EQIN
10
EQOUT
11
RV301
REC LEVEL
13
A 120/70
70
120
DECK PROCESS
IC401
10
PB A/B
PB L
LM ON/OFF
NORM/HIGH
NR ON/OFF
REC/PB/PASS
REC L
BIAS ON/OFF
RM ON/OFF
RELAY REC/PB
CAP M ON/OFF
CAP M H / L
A SHUT
B SHUT
A PLAY
B PLAY
A HALF
B
MAIN
SECTION
(Page 27)
S1005
TRIGGER
MOTOR
DRIVE
IC402
(REC A)
S1006
(B HALF)
S1009
(REC B)
VZ
IN2
IN1
BHALF
SWITCH
4
Q408, 409
6
5
TRIG H / L
B TRIG
A TRIG
— 26 —
09
2
M2
TRIGGER
MOTOR
M
OUT1
10
OUT2
— 25 —
HCD-XB8
— MAIN SECTION —
J761
MIC
J101
PHONO
IN
L
J101
VIDEO
(AUDIO)
IN
L
REC L
RELAY REC/PB
A SHUT
B SHUT
B HALF
B
DECK
SECTION
(Page 26)
A
TUNER
SECTION
(Page 20,
22)
C
CD
SECTION
(Page 24)
09
A HALF
A PLAY
B PLAY
PB A / B
NORM/HIGH
BIAS ON/OFF
RM ON/OFF
NR ON/OFF
REC/PB PASS
LM ON/OFF
CAP M H/L
TRIG H/L
CAP M ON/OFF
RDS DATA
RDS INT
COM DIN
COM DATA
STEREO
TUNED
T. SENS
SENS 2
CD CLK
CD DATA
UP SW
SQ CLK
SQ DATA
PB L
A TRG
B TRG
ST L
ST CE
MUTE
L CH
TBL. L
TBL. R
SCOR
SENS
X RST
X LAT
31
PHONO EQ AMP
IC101
MUTE
Q121
31
MIC AMP
V
1
TC
2
ST
4
CD
5
RV760
MIC
LEVEL
67
IC760
INPUT SELECT
IC102
MUTE
CONTROL
Q123,124
(DISC No.)
EXCEPT
AEP,UK
D201
INH
A
B
D+5V
10
3
9
6
1
2
3
4
Q201
— 27 —
3
5
96
26
27
28
97
94
95
87
88
89
90
91
92
93
82
83
84
85
86
41
42
44
45
66
70
69
68
72
67
60
61
18
76
73
74
57
48
47
77
36
34
58
62
22
21
INPUT SELECT
IC103
RELAY
A SHUT
B SHUT
B HALF
A HALF
A PLAY SW
B PLAY SW
PB A/B
EQ H//N
BIAS
REC MUTE
NR ON/OFF
R/P PASS
TC MUTE
CAP H/N
A TRG
B TRG
TRG LOW
CAP M ON/OFF
VOL LAT
PL LAT
COM DOUT
COM CLK
ST DIN
STEREO
TUNED
ST CE
ST MUTE
ST DOUT
TBL L
TBL R
SCOR
T SENS
SENS 2
SENS
XRST
CD CLK
CD DATA
UP SW
SQ CLK
SQ DATA IN
XLT
TRAY LED
RDS DATA
RDS INT
4
9
10
11
AEP,UK
DOLBY PRO LOGIC
9
LIN
3
41
DATA
4
42
CLK
2
40
EN
69
71
28
29
30
54
INPUT CHANGE
MASTER CONTROL
IC601
IC701
C-OUT
S-OUT
L-OUT
34
35
37
MICON
INTERFACE
34
32 33
3
4
LATCH
3
427 LAT SW F CON
CENTER
REAR
FRONT
3
4
2
65 64
99
10
8
3
2
4
CD POWER
STK MUTE
S-IN
L-IN
DATA
CLK
EN
POWER
DBFB H/L
TA MUTE
R RELAY
IIC DATA
IIC CLK
RESET
AC CUT
DELAY
IC602
XT1
XT2
FRONT
X1
X2
S-OUT
L-MIX
OUT
XTAL
XTAL
61
REC 2A
62
98
55
56
15
20
11
10
14
13
46
100
VOLUME
3
IN
14
IN
4
8
CLK
3
9
DATA
1
10
PANEL LED
LED
CONTROL
Q601
REMOTE
CONTROL
RECEIVER
IC602
S711
= AMS +
ROTARY
ENCODER
KEY
MATRIX
S681
6
OPEN
IC604
SWITCH
MUTE
Q254
MUTE
Q120
2
OUT
15
OUTLATCH
IC603
REAR
CENTER
6
5
LED SELECT
SPEANA 1
SPEANA 2
SPEANA 3
SPEANA 4
DOOR SW
VF
40
SWITCH
LED1
LED13
LED15
LED18
SIRCS
JOG A
JOG B
KEY 1
VOL A
VOL B
DBFB
Q201
•
L+R
AMP
IC861
BB22
3
1
AMP
7
5
7
FRONT
38
BB12
41
DBFB
SWITCH
Q202
3
10
•
15
•
16
•
18
LED
SWITCH
20
•
22
•
23
•
25
•
47
29
39
42
43
D/A
44
45
46
26
41
3733KEY 5
38
S701
24
40
VOLUME
ROTARY
ENCODER
13
FRONT
16
23
X601
8MHz
24
45 44 43 42
+ +
EQ
2
1
7
RESET
SWITCH
Q951
RESET
IC951
D951
+5V
X601
X701
8MHz
5MHz
X702
32.768KHz
MUTE
SWITCH
Q912
EQUALIZER / VOLUME
IC201
DATA
28
CLOCK
27
14
RESET
12
XOUT
13
XIN
SEG1-35
67 - 100 • 1
FLUORESCENT INDICATOR TUBE
DISPLAY CONTROL
IC601
GR1-16
51 - 66
FL601
39
S.WOOFER
MODE
SWITCH
Q206
REAR
MUTE
Q602
MUTE
Q601
Q602,603
CENTER
FRONT
DBFB
POWER ON/OFF
R RELAY
D+5V
REAR
CENTER
• R CH: Same as L ch
• SIGNAL PATH
: FM
: CD
: PB
: REC
: VIDEO
: MIC
CD POWER
STK MUTE
D
POWER
SECTION
— 28 —
HCD-XB8
D
MAIN
SECTION
(Page 28)
09
— POWER SECTION —
REAR
CENTER
FRONT
FRONT
DBFB
STK MUTE
R RELAY
CD POWER
POWER ON/OFF
POWER AMP
IC201
1 10
6
AU/D5V SW
D5V
SW
REAR
CENTER
Rch
CD REG
+5V REG
— 29 —
THERMAL
DET
Q670,671
THP670
OVER LOAD
DET
Q201
D5V
SWITCHED
Q904
Q906
Q905
Q907
OVER LOAD
MUTE
SWITCH
Q331
1
DET
Q601,651
POWER AMP
IC601
6
Rch
+5V
D905
D7V
A+7.5V
A–7.5V
+12V
ST10V
PRO-LOG 10V
TM402
SURROUND
UNREG
–12V
FRONT
Rch
TRANSFORMER
T501
POWER
SPEAKER
TM401
FRONT
SPEAKER
J760
PHONES
M
MOTOR
E,AR,PX,SAF
SELECTOR
REAR
CENTER
M901
FAN
VOLTAGE
S501
• R CH : Same as L ch
• SIGNAL PATH
: FM
• Abbreviation
EE: East European model.
AC
MX: Mexican model.
IN
AR: Argentine model.
AUS: Australian model.
SAF: South African model.
RY401
Q901
6
PROTECTOR
PROTECT
V
CC
V
EE
RY402
IC301
7
SWITCH
Q301
2
9
UNREG
–12V
POWER B+
POWER B–
SURR B+
SURR B–
–1
–2
RELAY
DRIVE
Q404
Rch
–1
RELAY
DRIVE
Q403
RELAY
CONTROL
Q402
HP / SP
SWITCHING
RECT
RELAY
Q401,405
VFDP
E,MX,AR,PX,AUS,SAF
RECT
D302,303
VF REG
Q941
RY101
4
RECT
D901
D110,111
RECT
D101
RECT
D102
DRIVER
Q111-113
AEP,UK,EE,CIS
10
1318
2
Rch
+7.5
1
–7.5 EN
10
+5V REG
IC902
3 1
+7V REG
IC903
3 1
+7V, –7V REG
IC901
4
+12V REG
IC904
3 1
3 1
+10V REG
IC905
1
Q323
FAN MOTOR
DRIVER
Q961, 962
RECT
D104,105
REAR
CENTER
VF
VF
— 30 —
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