Service manual

AVD-K150B/K150E/K150G/K150N/K150R

SECTION 3

ELECTRICAL ADJUSTMENTS

3-1. VCR SECTION ELECTRICAL ADJUSTMENT

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(W373, W374) and CH2 to the Video Out for the VCR.

c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW(W373, W374), and then check the dis-

tance (time difference), which is from the selected A(B) Head point of the H/SW(W373, W374) signal to

the starting point of the vertical synchronized signal, to 6.5H ± 0.5H (412µs, 1H=63µs).

Note - Press FRONT CH UP KEY and FRONT PLAY KEY on Deck playback, and it goes in to ATR PRE-

SET. after the SP Test Tape is inserted.

• PG Adjustment Method

a-1) Payback the SP standard tape

b-2) Press the “O” key on the Remote controller and the “PLAY” 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

V.Out

H/SW(W373, W374)

R/C TRK JIG KEY 6.5 ± 0.5H

MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION

V.Out

H/SW(W373, W374)

OSCILLOSCOPE

CH1 CH2

V.out

H/SW

R/C KEY

(W373, W374)

H/SW

Composite

VIDEO

6.5H(412µs)