JVC HR-XV45SEF Service Manual page 32

4.5 ELECTRICAL ADJUSTMENT PROCEDURES (VCR)
4.5.1 Servo Adjustment
1) PG Adjustment
Test Equipment
a) OSCILLOSCOPE
Adjustment And Specification
MODE
PLAY
Adjustment Procedure
a) Insert the Alignment Tape and play.
Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the "ATR" is blink after the
Alignment Tape is inserted.
b) Connect the CH1 of the oscilloscope to the H/SW(TP) and CH2 to the Video Out for the VCR.
c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW(TP) and then check the distance (time
difference), which is from the selected A(B) Head point of the H/SW(TP) signal to the starting point of
the vertical synchronized signal, to 6.5H
PG Adjustment Method
a-1) Playback the Alignment tape
b-2) Press the "OK(ENTER)" key on the Remote controller and the "REC" key on the Front Panel the same
time, then it goes in to Tracking initial mode.
c-3) Repeat the above step(No.b-2), then it finishes the PG adjusting automatically.
d-4) Stop the playback, then it goes out to PG adjusting mode after mony the PG data.
CONNECTION
WAVEFORM
1-32 (No.YD070)
MEASUREMENT POINT
V.Out
H/SW(TP)
0.5H (412 s, 1H=63 s).
V.Out
H/SW
(TP)
H/SW
Composite
VIDEO
b) Alignment tape (SP, stairstep)
ADJUSTMENT POINT
R/C TRK JIG KEY
OSCILLOSCOPE
R/C KEY
6.5H(412 s)
SPECIFICATION
6.5 0.5H
CH1 CH2
H/SW V.out
(TP)