Electrical Adjustment - Sharp XV-C1E Service Manual

Adjustment Item
I NTSC free-
running
frequency
running
frequency
NTSC
horizontal
center (DAC)
PAL horizontal
center (DAC)
Contrast (DAC)
(gamma
correction on)
Adjustment Conditions
1. Receive the NTSC monoscope pattern
signal.
2. Make a short-circuit between pin (6) of
1. Receive the PAL monoscope pattern
2. Make a short-circuit between pin (6) of
1. Receive the NTSC monoscope pattern
signal.
2. Press 52001 to call up the ADJ IN
mode and select the following subject.
Group: VIDEO 1
Subject: H-CENT
1. Receive the PAL monoscope pattern
signal.
2. Press 52001 to call up the ADJ IN
mode and select the following subject.
Group:
VIDEO 3
Subject: PAL-H-CENT
signal.
2. Apply 3.5 Vdc to pin (7) of P803 to turn
off the gamma corrector.
3. Connect an oscilloscope between pin
(2) of Pl401 and GND.
4. Press S2001 to call up the ADJ IN
mode and select the following subject.
Group: VIDEO 2
Subject: S-BIAS
5. Using the A and v keys, put the
waveform to its proper shape.
6. Select the following subject.
Group: VIDEO 1
Subject: SUB-R, SUB-G, SUB-B
Make sure all these subjects have an
entry of 0 (zero).
7. Adjust R861 to get the highest gain.
8. Finally select the following subject.
Group: VIDEO
Subject: CONT
14
Adjustment Procedure
Turn Rl616 until the image appears
l
as specified.
Turn Rl602 until the image appears
l
as specified.
Using the A and v keys, make the
l
l e f t .
Using the A and v keys, make the
l
left.
Using the A and v keys, adjust the
l
difference between the 100% white
level and the pedestal level to
I