Mitsubishi HS-U748 Service Manual page 52

[ Servo circuit ]
1. Playback Switching
Point
Measuring instrument and condition
– – –
Test point – – –
EXT trigger – – –
Measurement
– – –
range
PCB-MAIN (Component side)
TP5A
TP5B
Adjustment purpose Video switch over timing during playback.
Symptom when Switching noise or jitter in the playback picture.
incorrectly adjusted
VCR set up condition
Input signal – – –
Alignment Tape
Using tape
( NS1, stair step )
VCR
Playback
condition
Using Jig – – –
1. Play back an Alignment Tape. (NS1, stair step)
2. Short-circuit TP5A to TP5B.
3. Push the CHANNEL-UP, DOWN buttons at the
same time.
(The adjustment will finish in about six seconds.)
4. Open-circuit TP5A to TP5B.
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