Aiwa HV-FX780 Service Manual page 31

1. Servo Adjustment
1) PG Adjustment
MODE
PLAY
(TTV-P1)
• Adjustment Procedure
1. Insert the PAL SP Test Tape (TTV-P1) and play.
Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the "ATR" is blink after the
PAL SP Test Tape is inserted.
2. Connect the CH1 of the oscilloscope to the H/SW (W321, 322) and CH2 to the Video Out for the VCR.
3. Trigger the mixed Video Signal of CH2 to the CH1 H.SW (W321, W322), and then check the distance (time
difference), which is from the selected A(B) Head point of the H.SW(W321, W322) signal to the starting
point of the vertical synchronized signal, to 6.5H ± 0.5H (412µs, 1H=63.5µs).
• WAVEFORM
Composite
MEASUREMENT POINT
VIDEO OUT
H/SW (W321, W322)
H/SW
VIDEO
ADJUSTMENT POINT
VR501
6.5H(412µs)
39
SPECIFICATION
6.5 ± 0.5H