Electrical Adjustment - Sharp VC-MH80 Service Manual

VC-MH80

5. ELECTRICAL ADJUSTMENT

Notes:
l 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
adjustments, otherwise adjustments can not be completed.
l Instruments required:
@Audio signal generator
@Screwdriver for adjustment
@Frequency counter
When the IC703 (E*PROM) has been replaced, make the following reprogramming. Depending on models,
the IC703 (E*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.
l Location of controls and test points
@Dual-trace oscilloscope
@Alignment tape.(VROCPSV)
@Alignment tape (VROATSV)
@Alignment tape (VROCBFFS)
@Alignment tape (VROCPZJS)
Figure