Vcr Part; Electrical Adjustment Procedures - Toshiba SD-V55HTSU Circuit Diagrams

ELECTRICAL ADJUSTMENT PROCEDURES

1. Servo Adjustment
1) PG Adjustment
• Test Equipment
a) OSCILLOSCOPE
b) NTSC MODEL : NTSC SP TEST TAPE
• Adjustment And Specification
MODE
PLAY
• Adjustment Procedure
a) Insert the SP Test Tape and play.
b) Press the "O" key on the Remote controller and the "PLAY" key on the Front Panel the same time, the
unit then goes in to Tracking initial mode.
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) Playback 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,
Tracking initial mode.
c-3) Repeat the above step(No.b-2), the unit will then finish the PG adjusting automatically.
d-4) Stop the playback, the unit then exits PG adjusting mode after saving the PG data.
• CONNECTION
• WAVEFORM

VCR PART

MEASUREMENT POINT
V.Out
H/SW(W373, W374)
V.Out
H/SW(W373, W374)
H/SW
Composite
VIDEO
ADJUSTMENT POINT
R/C TRK JIG KEY
R/C KEY
6.5H(412µs)
3-3
SPECIFICATION
6.5 ± 0.5H
OSCILLOSCOPE
CH1 CH2
H/SW V.out
(W373, W374)