Zenith XBV613 Service Manual - Page 13

VCR PART ELECTRICAL ADJUSTMENT PROCEDURES 1. Servo Adjustment 1) PG Adjustment • Test Equipment a) OSCILLOSCOPE b) NTSC MODEL : NTSC SP TEST TAPE • Adjustment And Specification MODE MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION PLAY V.Out H/SW(TP) R/C TRK JIG KEY 6.5 ± 0.5H • Adjustment Procedure a) Insert the SP Test Tape and play. Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the "ATR" is blink after the SP Test 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 ± 0.5H (412µs, 1H=63µs). • PG Adjustment Method a-1) Payback the SP standard 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 PG adjusts automatically. d-4) Stop the playback, PG adjustment is finished. • CONNECTION V.Out H/SW (TP) OSCILLOSCOPE CH1 CH2 R/C KEY • WAVEFORM H/SW V.out (TP) H/SW Composite VIDEO 6.5H(412µs) 3-2