Sony MHC-V818 Service Manual ▷ View online
– 9 –
SECTION 3
DISASSEMBLY
Note:
Follow the disassembly procedure in the numerical order given.
3-1. LOADING PANEL
3-2. FRONT PANEL
3
Loading panel
2
Pull-out the disc tray.
1
Turn the cam to the direction
of arrow.
Claws
1
Three screws
(BVTP3x8)
9
Front panel assembly
2
Screw
(BVTP3x10)
3
Screw
(BVTP3x10)
4
Connector
(CN203)
5
Connector
(CN752)
8
Flat type wire
(CN101)
7
Flat type wire
(CN106)
6
Flat type wire
(CN107)
– 10 –
3-3. CASSETTE MECHANISM DECK
3-4. PANEL BOARD AND CONT COM BOARD
1
Two screws
(BVTT 2x4)
2
Two screws
(BVTT 2x4)
9
Three screws
(BVTP 2.6x8)
!º
Two screws
(BVTP 2.6x8)
!£
Two screws
(BVTP 2.6x8)
!¡
Screw
(BVTP 2.6x8)
!™
Screw
(BVTP 2.6x8)
!¢
Bracket
!∞
Mechanism deck
3
Damper, oil
4
Damper, oil
5
Push the cassette lids.
6
Remove the cassette lids.
7
Spring
8
Spring
1
Ten screws
(BVTP 2.6x8)
2
Three screws
(BVTP 2.6x8)
!º
Four screws
(BVTP 2.6x8)
!¡
Six screws
(BVTP 2.6x8)
3
Panel board
!™
CONT COM
board
4
Shield
5
Flat type wire
(CN602)
6
Konb(Jog)
7
Nut
9
Nut
8
Konb(Volume)
– 11 –
3-5. DISC TRAY
Note: When installing the Disc tray, pull around the flat type wire to
pass through the clawA and clawB, as shown in the figure.
(Perfom after removing the front panel.)
Claw
B
Claw
A
1
Turn the cam the
direction of arrow.
2
Pull-out the disc tray.
5
Remove the disc tray.
4
Two claws
3
Flat type wire (8 core)
– 12 –
SECTION 4
TEST MODE
VIDEO CD COLOR-BARS MODE
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 (IC502) for video CD signal check. When measurement of the voltage and waveform on the VIDEO
board, perform it in this mode.
For refernce, the color-bars signal can be observed at J302 (VIDEO OUT) and the sound signal can be observed at J101 (VIDEO/MD
(AUDIO) OUT) using an oscilloscope.
1. Connect the lead wire to both ends of the land of SL503 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.
mechanism control microcomputer (IC502) for video CD signal check. When measurement of the voltage and waveform on the VIDEO
board, perform it in this mode.
For refernce, the color-bars signal can be observed at J302 (VIDEO OUT) and the sound signal can be observed at J101 (VIDEO/MD
(AUDIO) OUT) using an oscilloscope.
1. Connect the lead wire to both ends of the land of SL503 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.
[VIDEO BOARD] (SIDE A)
[VIDEO BOARD] (SIDE B)
SL501
D502
SL502
IC507
IC505
CT503
SL503
TEST MODE
VIDEO
FREQUENCY
FREQUENCY
SL501
IC502
SL502
SL503
TEST
MODE
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