Memorex MVR4041, Service Manual

Page: 77 / 157

ELECTRICAL ADJUSTMENTS
CAUTION
When replacing IC's or transistors, use only specified
silicon grease (YG6260M).
(To prevent the damage to IC's and transistors.)
1-1: PG SHIFTER
CONDITIONS
MODE-PLAYBACK
Input Signal-Alignment Tape (JG001P)
INSTRUCTIONS
6.5H
CH-1
CH-2
CH-1
CH-2
6.5H
Fig. 1-1-A
Fig. 1-1-B
Read and perform this adjustment when repairing the
circuits or replacing electrical parts or PCB assemblies.
1. BASIC ADJUSTMENT
1.
2.
3.
4.
D2-1
Connect CH-1 on the oscilloscope to TP1002 and CH-2
to TP4201.
Playback the alignment tape. (JG001P)
Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
Adjust the VR1001 until the waveform of the oscilloscope
measures 6.5
±
0.5(H) at both leading and trailing edges.
(Refer to Fig. 1-1-A, B)