Mechanical Section Adjustment; Operating Without A Cassette; Tape Path Adjustment; Preparations For Adjustments - Sony GV-A500 Service Manual

5-2. MECHANICAL SECTION
ADJUSTMENT
Mechanism Parts Adjustments
For details on the adjustments and checks of mechanical section
and replacements of mechanism parts, refer to the separate volume-
"8 mm Video Mechanism Adjustment Manual
2-1.

OPERATING WITHOUT A CASSETTE

1) Refer to "Section 2 DISASSEMBLY" and supply the power
with the cabinet removed. (So that the mechanical deck can be
operated.)
2) Connect the adjusting remote commander to the LANC
terminal.
3) Turn on the HOLD switch of the adjusting remote commander.
4) Close the cassette compartment without loading a cassette and
complete loading.
5) Set page: 0, address: 01, data: 01.
6) Set page: F, address: 29, data: 01 and press the PAUSE button
of the adjusting remote commander.
7) Set page: D, address: 10, data: 04 and press the PAUSE button
of the adjusting remote commander.
8) Disconnect the power supply of the unit.
By carrying out the above procedure, the unit can be operated without
loading a cassette.
Be sure to carry out "Processing after Operations" after checking
the operations.
Set the data of page: D, address: 10 to the following if the sensor
ineffective mode, forced PLAYER (VTR) power supply ON mode
or forced camera power supply ON mode are to be used together.
Forced VTR power supply ON mode ································· 06
[Processing after Operations]
1) Set page: 0, address: 01, data: 01.
2) Set page: F, address: 29, data: 00 and press the PAUSE button
of the adjusting remote commander.
3) Set page: D, address: 10, data: 00 and press the PAUSE button
of the adjusting remote commander.
4) Set page: 0, address: 01, data: 00 .
5) Disconnect the power supply of the unit.
2-2.
1.
1) Clean the tape path face (tape guide, drum, capstan shaft, pinch
roller).
B Mechanism ".
2) Connect the adjusting remote commander to the LANC
terminal.
3) Turn on the HOLD switch of the adjusting remote commander.
4) Select page: 0, address: 01, and set data: 01.
5) Select page: F, address: 29, and set data: 04 and press the PAUSE
button of the adjusting remote commander.
(
Be sure to perform "Processing after operations" after
completing adjustments.
6) Connect the oscilloscope.
Channel 1: Pin 6 of CN207 of VC-197 board
External trigger: Pin 3 of CN207 of VC-197 board
(
Connect the oscilloscope via the CPC-7 jig
(J-6082-382-A).
7) Playback the alignment tape for tracking.
WR5-1NP: For NTSC model (GV-A500)
WR5-1CP: For PAL model (GV-A500E)
8) Check that the RF waveform of the oscilloscope is flat at both
the entrance and the exit.
If not flat, perform necessary adjustment according to the
separate "8 mm Video Mechanical Adjustment Manual
Mechanism)".
9) Perform "Processing after operations", after completing
adjustments.
CN207 of VC-197 board
Pin No.
1
2
3
4
5
6
7
8
[Processing after operations]
1) Connect the adjusting remote commander, and turn on the
HOLD switch.
2) Select page: 0, address: 01, and set data: 01.
3) Select page: F, address: 29, and set data: 00.
4) Press the PAUSE button of the adjusting remote commander.
5) Select page: 0, address: 01, and set data: 00.
6) Remove the power supply from the unit.
5-11

TAPE PATH ADJUSTMENT

Preparations for adjustments

Signal Name Pin No.
PB PCM RF
REC RF 10
RF SWP 11
CAP FG 12
REG GND 13
PB RF 14
RF AGC IN 15
REC AFM 16
Fig. 5-2-1.
)
)
(B
Signal Name
9 EZ I/O
VGL-19V
BPF MON
RF AGC OUT
AFC FO
Must be flat