Sony HCD-VR50 / HCD-VR50XR / HCD-VR70 / LBT-VR50 / LBT-VR50R Service Manual ▷ View online
– 9 –
3-3. SUB PANEL
3-4. CD-L/CD-R BOARD AND CD LID ASSEMBLY
3
Open the CD lid assembly
8
Sub panel block
4
Two screws (BTP 2.6x6)
1
Two screws (BVTP 2.6x8)
6
Two screws (BVTP 2.6x8)
7
Three screws (BVTP 2.6x8)
5
Screw (BVTP 3x8)
2
Front input board
9
Two screws (BVTP 2.6x8)
0
Bracket (CD-R2)
!£
CD lid assembly
1
Three screws (BVTP 2.6x8)
7
Three screws
(BVTP 2.6x8)
8
Two screws (BVTP 2.6x8)
9
Bracket (CD-R)
0
CD-R board
2
Three screws
(BVTP 2.6x8)
3
Bracket (CD-L)
4
CD-L board
!™
Torsion spring (CD-L)
Torsion spring (CD-L)
Note for installation
Sub panel assembly
Sub panel assembly
CD lid assembly
5
Knob (CD)
6
Nut
!¡
Torsion spring (CD-R)
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3-5. TAPE MECHANISM DECK AND CASSETTE LID
3-6. CD MECHANISM DECK
3-7. BASE UNIT
5
Cassette lid (B) assembly
(Refer to upper figure)
7
Holder (B) assembly
(Refer to lower figure)
6
Holder (A) assembly
(Refer to lower figure)
4
Cassette lid (A) assembly
(Refer to upper figure)
Cassette lid assembly
Holder assembly
Claw
Claw
Claw
Claw
8
Torsion spring (TC-A)
9
Torsion spring (TC-B)
1
Three screws (BVTP 2.6x8)
2
Three screws
(BVTP 2.6x8)
3
Tape mechanism
Portion
B
Portion
B
Portion
A
Portion
A
Note for installation
1
Five screws (BVTP3x8)
2
CD mechanism
deck
3
Base unit
1
Yoke fitting
2
Boss
– 11 –
3-8. DISC TABLE
Note:
When the disc table is installed, adjust the positions of
roller cam and mark
roller cam and mark
” as shown in the figure, then set to
the groove of disc table.
A
A
2
Screw (BVTP3X8)
1
Screw (BVTP3X8)
4
Stop screw
5
Disc table
3
Bracket (BU)
– 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 reference, 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 reference, 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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