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8-3. DIGITAL TITLER SYSTEM ADJUSTMENT
Preparations:
Open the cabinet (with the camera and video blocks connected
state).
1. Open the VC-95 board,
2.
Connect 12-pin extension cord between CN305
on the
VC-95 board and W702 on the VA-68 board,
3.
Connect 4-pin extension cord between CN307 on the VC-95
board and W701 on the VA-68 board.
4.
Open the VA-68 board.
5,
Open the CT-39 board.
6.
Connect 20-pin extension cord between CN705
on the
CT-39 board and CN703 on the VA-68 board.
8-3-1.
4FSC Frequency Adjustment (CT-39 Board)
Mode
EE
Signal
Non-signal
Measurement point
Emitter of Q707
Measuring instrument | Frequency counter
'Adjustment element
| CT702
Specified value
3579545 + 50 Hz
Connection:
1)
Connect Pin @ of 1C704 and Pin @ of CN705 (VIDEO
4.9V) with a jumper wire.
2)
Connect Pin ® of 1C704 and Pin @ of CN705 with 10 kQ
resistor.
3)
Connect Pin @ of IC704 and GND with 22 kQ resistor.
Adjusting Method:
1) Set POWER switch to VTR position.
2)
Set IN/OUT select switch to OUT position.
3)
Adjust to 3579545 + 50 Hz with CT702.
4)
Set POWER switch to CAMERA position.
approx.
150 mVp-p
Fig. 8-37.
8-3-2.
Controller Frequency Adjustment
(CT-39 Board)
Subject
All white pattern
Measurement point
Pin @ of 1C707
| Measuring instrument | Oscilloscope
|
Adjustment element
CT701
Specified value
1.5 +021 usec
Adjusting Method:
1)
Press DATA SCREEN button.
2)
Press COLOR/MODE button unti
the monitor TV screen.
3)
Press TITLE 1 button.
4)
Press MEMORY button.
5)
Press COLOR/MODE
button
untill
all white
title is
displayed on the monitor TV screen.
6)
Adjust to 1.5 + 0.1 psec with CT701.
Belnark is displayed on
1540.1
psec
Fig. 8-38,
— 270 —
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