ELECTRICAL ADJUSTMENT
1. SERVO/SYSCON CIRCUIT ADJUSTMENT METHOD v VIDEO HEAD SWITCHING POSITION
Adjustment Part |
| Checking Point | Measuring Equipment | Mode | Test Tape |
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R595 |
| TJ396 | OSCILLOSCOPE | Play | |
| PT501 PIN3 | ||||
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v CONNECTION METHOD |
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TJ396 |
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| Oscilloscope |
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PT501 | R595 |
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vADJUSTMENT PROCEDURE
1)Play back the test tape.
2)Set the oscilloscope in the chop mode connect the CH1 to SW pulse(PT501 (r)PIN), the CH2 to TJ396(video out) with CH1 triggering.
3)Adjust R595 for the positive trigger until 6.5 ± 0.5H cycle before the vertical SYNC pulse.
CH1
| SW PULSE |
| (PT501 3PIN) |
| Vertical SYNC Signal |
| VIDEO OUT |
1H | (TJ396) |
6.5H | 0.5H |
Trigger Position
6