HCD-V8800, LBT-V8800AV - Sony Audio Service Manual (repair manual)

— 1 —

HCD-V8800 is the tuner, deck, Video CD and
amplifier section in LBT-V8800AV.

Model Name Using Similar Mechanism

HCD-V4500

CD Mechanism Type

CDM37L-5BD21AL

Base Unit Type

BU-5BD21AL

Optical Pick-up Type

KSS-213D/Q-NP

Model Name Using Similar Mechanism

HCD-V4500

Tape Transport Mechanism Type

TCM-220WR2

CD

SECTION

E Model

Chinese Model

TAPE

DECK

SECTION

2008C02-1
© 2008.03

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Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be

 damaged by heat.

• 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.

E, SP model

MY model

CH model

IA model

MODEL

PARTS No.

4-992-220-0 

4-992-220-1 

4-992-220-2 

4-992-220-3 

• Abbreviation

SP : Singapore model
MY : Malaysia model
IA : Indonesian model
CH : Chinese model

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.......................................................... 4

.......................................................................... 6

3-1. Front Panel ........................................................................... 7
3-2. Main Board ........................................................................... 8
3-3. Tape Mechanism Deck .......................................................... 8
3-4. Cassette Lid Assembly .......................................................... 9
3-5. CD Lid Assembly .................................................................. 9
3-6. CD Mechanism Deck .......................................................... 10
3-7. Base Unit ........................................................................... 10
3-8. Disc Table ........................................................................... 10

..............................................................

11

...........................

12

............................... 12

7-1. Circuit Boards Location ...................................................... 17
7-2. Block Diagrams

• KEY CON Section ........................................................... 18
• CD Section ....................................................................... 19
• Video Section ................................................................... 21
• Deck Section .................................................................... 23
• Main Section .................................................................... 25
• Power Section .................................................................. 27

7-3. Printed Wiring Board — CD Section — ............................. 29
7-4. Schematic Diagram — CD Section — ............................... 31
7-5. Schematic Diagram — Video Section — ........................... 33
7-6. Printed Wiring Board — Video Section — ......................... 37
7-7. Printed Wiring Board — Main Section — .......................... 40
7-8. Schematic Diagram — Main Section — ............................ 43
7-9. Schematic Diagram — Deck Section — ............................ 47
7-10. Printed Wiring Board — Deck Section — ....................... 51
7-11. Schematic Diagram — Panel Section — ......................... 54
7-12. Printed Wiring Board — Panel Section — ....................... 57
7-13. Schematic Diagram — Power Section — ........................ 61
7-14. Printed Wiring Board — Power Section — ..................... 65
7-15. Schematic Diagram — CD Motor Section — .................. 68
7-16. Printed Wiring Board — CD Motor Section — ............... 69
7-17. Schematic Diagram — KEY CON Section — ................. 71
7-18. Printed Wiring Board — KEY CON Section — .............. 72
7-19. IC Block Diagrams ........................................................... 73
7-20. IC Pin Functions ............................................................... 80

8-1. Case and Back Panel Section .............................................. 97
8-2. Front Panel Section 1 .......................................................... 98
8-3. Front Panel Section 2 .......................................................... 99
8-4. Chassis Section ................................................................. 100
8-5. TC Mechanism Section-1 (TCM-220WR2) ..................... 101
8-6. TC Mechanism Section-2 (TCM-220WR2) ..................... 102
8-7. TC Mechanism Section-3 (TCM-220WR2) ..................... 103
8-8. CD Mechanism Section (CDM37L-5BD21AL) ............... 104
8-9. Base Unit Section (BU-5BD21AL) .................................. 105

...................................... 106

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.

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.

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output three times.

— 4 —

• 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.

• 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.

• 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.

• 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.

• 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.

• 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  but-

ton 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.

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 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 “–” direc-
tion.
“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.

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.

1-1. 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 fluo-

rescent 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 se-
quence.

1. The disc tray turns to select a disc. (For a disc selection se-

quence, 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 se-

quence:

Disc 1 

→

 Disc 3

↑

↓

Disc 3 

←

 Disc 1