DOWNLOAD Sony HCD-V5500 / MHC-V5500 / MHC-V7700AV (serv.man3) Service Manual ↓ Size: 6.54 MB | Pages: 60 in PDF or view online for FREE

— 5 —

Follow the disassembly procedure in the numerical order given.

Unscrew the five case attachment in the screws (case)
(M3 

×

 8) 

×

 4, (+BV 3 

×

 8) 

×

 1 and remove the case.

8

 Screw 

    +BVTP 3 

×

 10

1

 Screw 

    +BVTP 3 

×

 10

1

 Screw 

    +BVTP 3 

×

 10

7

 Screw 

    +BVTP 3 

×

 10

6

 CN111 (8 pin)

5

 CN112 (9 pin)

4

 Flat wire (19 core)

9

 CD block

3

 Back panel

2

 Screw 

    +BVTP 3 

×

 8

1

Press the EJECT button and open the cassette lid.

6

 Screw 

    +BVTT 3 

×

 8

7

 Screw 

    +BVTP 2.6 

×

 8

4

 Flat wire (11 core)

5

 Flat wire (21 core)

Mechanism Deck (TCM-220WR2E)

2

8

1

1

3

— 6 —

!£

 Screw 

    +BVTP 3 

×

 8

2

 Front panel assy

!§

 Screw 

    +BVTP 3 

×

 8

1

 Screw 

    +BVTP 3 

×

 8

!¢

 Bracket (H/S)

!∞

 Resistor board

!¶

 Main board

6

 Screw 

    +BVTP 3 

×

 10

3

 Screw 

    +BVTP 3 

×

 10

7

 Bracket V (T)

9

 VIDEO board

8

 Screw 

    +BVTP 3 

×

 8

5

 

!º

 Screw 

    +BVTP 3 

×

 8

4

 

!¡

 VIDEO IN board

!™

 Bracket (BP)

7

 Bracket V (B)

Rotate the BU CAM assembly in the direction of the arrow and pull out the slide.

Tray (Slide)

1

BU CAM assy

— 7 —

On this mode, the data of the color-bars signal as a picture signal
and the 1kHz sine wave signal as a sound signal are output by the
mechanism control microcomputer (IC701) for video CD signal
check. When measurement of the voltage and waveform on the
VIDEO board, perform it in this mode.
For reference, the color-bars signal can be observed at J9001
(VIDEO OUT) and the sound signal can be observed at J101
(VIDEO (AUDIO) OUT) using an oscilloscope.

1.

Connect the lead wire to both ends of the land of SL701 (CAL
BAR) of the VIDEO board.

2.

Turn the power on. Press  FUNCTION  button to select CD.

3.

After 2 or 3 seconds later, connect the lead wire.

4.

After measuring, remove the lead wire connected.

Note :

The 1kHz sine wave is not outputted when the CD is played

once, but it is not error.

SL703 (AFADJ)

SL702 (ADJ)

SL701 (CAL BAR)

IC751

IC251

— 8 —

1.

Clean the following parts with a denatured-alcohol-moistened
swab:

record/playback head

pinch roller

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.

1.

The adjustment should be performed in the publication.
(Be sure to make playback adjustment at first.)

2.

The adjustment and measurement should be performed for both
L-CH and R-CH.
• Switch position

DOLBY NR switch : OFF
FUNCTION button : OFF
EFFECT switch

: OFF

DBFB switch

: OFF

3.

Deck section electrical adjustments are made in test mode by
press key switch same time  CD STOP   DECK A STOP  and
DECK B STOP  button.

4.

Input point and output level measurement point.

•

Test Tape

  0 dB=0.775V

Procedure:
1.

Forward Playback mode
Reverse Playback mode

Forward

CQ-102C

36 to 61g•cm

(0.50 – 0.84 oz•inch)

Forward

CQ-102C

2 to 6g•cm

Back Tension

(0.028 – 0.083 oz•inch)

Reverse

CQ-102RC

36 to 61g•cm

(0.50 – 0.84 oz•inch)

Reverse

CQ-102RC

2 to 6g•cm

Back Tension

(0.028 – 0.083 oz•inch)

FF, REW

CQ-201B

61 to 143g•cm

(0.85 – 1.99 oz•inch)

Forward

CQ-403A

more than 100 g (3.53 oz)

Reverse

CQ-403R

more than 100 g (3.53 oz)

P-4-A100

10 kHz, –10 dB

Head Azimuth Adjustment

P-4-L300

315 Hz, 0dB

Level Adjustment

WS-48B

3 kHz, 0dB

Tape Speed Adjustment

Output level

measurement

point

L-CH

R-CH

attenuator

AF OSC

CNB108

SYSTEM

CONTROL

PB (R)

PB (L)

REC (L)

REC (R)

9

7

6

4

CNB108

set

Output level measurement point

+
–

VTVM

test tape
P-4-A100
(10 kHz, –10 dB)