38
DV-NC55S/H
DV-NC60H
9. ELECTRICAL ADJUSTMENT
Notes:
• Before the adjustment:
Electrical adjustments discussed here are often required after replacement of electronic components and mechanical
parts such as video heads.
Check that the mechanism and all electric components are in good working condition prior to the adjustments,
otherwise adjustments can not be completed.
• Instruments required:
Colour TV monitor
Dual-trace oscilloscope
Alignment tape (VROCPSV)
Blank video cassette tape
DC voltmeter
Screwdriver for adjustment
Servicing precations
When the IC705 (E
2
PROM) has been replaced, make the following reprogramming. Depending on models, the IC705
(E
2
PROM) has been factry-adjusted for it’s memory function.
It’s therefore necessary to reprogram the memory function for the model in question.
Note that the servo circuit requires readjustments for the head switching point, slow and still modes.
• Location of controls and test points
Figure 9-1.
VCR Mechanism DVD
POW
P201
TU1401
TP5102 TP5101
AV
TERMINAL
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