Service manual

3-3
ELECTRICAL ADJUSTMENT PROCEDURES
1. Servo Adjustment
1) PG Adjustment
• Adjustment And Specification
• Test Equipment
a) OSCILLOSCOPE
b) NTSC MODEL : NTSC SP TEST TAPE
MODE
PLAY
• Adjustment Procedure
a) Insert the SP Test Tape and play.
b) Connect the CH1 of the oscilloscope to the H/SW(W861, W862) and CH2 to the Video Out for the VCR.
c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW(W861, W862), and then check the dis-
tance (time difference), which is from the selected A(B) Head point of the H/SW(W861, W862) signal to
the starting point of the vertical synchronized signal, to 6.5H ± 0.5H (412µs, 1H=63µs).
Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the “ATR” is blinking after
the SP Test Tape is inserted.
• PG Adjustment Method
a-1) Playback the SP standard tape
b-2) Press the “OK(ENTER)” key on the Remote controller and the “REC” key on the Front Panel at the
same time, then the unit will go in to Tracking initial mode.
c-3) Repeat the above step(No.b-2), then the unit finishes the PG adjusting automatically.
d-4) Stop the playback, then the unit goes out of PG adjusting mode after saving the PG data.
• CONNECTION
• WAVEFORM
V.Out
H/SW(W861, W862)
R/C TRK JIG KEY 6.5 ± 0.5H
MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION
V.Out
H/SW(W861, W862)
OSCILLOSCOPE
CH1 CH2
V.outH/SW
R/C KEY
(W861, W862)
H/SW
Composite
VIDEO
6.5H(412µs)
VCR PART