Electrical Adjustment Procedures - Sanyo VHR-M262EV Service Manual

ELECTRICAL ADJUSTMENT PROCEDURES

1. Servo Adjustment
1) PG Adjustment
• Test Equipment
a) OSCILLOSCOPE
b) PAL TEST TAPE (VHS SP)
c) JIG REMOCON (AUTO PG SETTING)
• Adjustment And Specification
MODE
PLAY
• Adjustment Procedure
a) Insert the PAL SP Test Tape and play.
Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the "ATR(OSD on moni-
tor)" is blink after PAL SP test Tape is inserted.
b) Press Front"Play" key on set and "0" key on
Remocon.(Then check the light all CLK/DOT LED on CLK/LED -TRK is a Initial)
c) press Front "Play" key on set and "0" key on
Remocon again.(Then check the blink "OFF->ON" on CLK/LED, Then check blink "PG
waveform" on oscilloscope.
• Check the PG
a) Connect the CH1 of the oscilloscope to the H/SW and CD2 to the Video out for the VCR.
b) Trigger the mixed Video Signal of CH2 to the CH1 H/SW(W501, W502), and then check the distance
(time difference), which is from the selected A(B) Head point of the H/SW(W501, W502) signal to the
starting point of the vertical synchronized signal, to 6.5H ± 0.5H (416µs, 1H=64.0µs).
• CONNECTION
MEASUREMENT POINT
V.Out
H/SW(W501, W502)
V.Out
H/SW(W501,W502)
ADJUSTMENT POINT
OSCILLOSCOPE
3-2
SPECIFICATION
6.5 ± 0.5H
CH1 CH2
H/SW V.out
(W501, W502)