Sharp XV-C1E - Electrical Adjustment

XV-ClE 1
ELECTRICAL ADJUSTMENT
3.
Adjustment Item
Adjustment Conditions
Adjustment Procedure
I
NTSC free-
1. Receive the NTSC monoscope pattern
l Turn Rl616 until the image appears
running
signal.
as specified.
frequency
2. Make a short-circuit between pin (6) of
(R1616)
P803 and GND.
)
- PAL free-
running
frequency
(R1602)
1. Receive the PAL monoscope pattern
l Turn Rl602 until the image appears
signal.
as specified.
2. Make a short-circuit between pin (6) of
P803 and GND.
1 NTSC
horizontal
center (DAC)
1. Receive the NTSC monoscope pattern
l Using the A and v keys, make the
signal.
overscan just the same at right and
2. Press 52001 to call up the ADJ IN
left.
mode and select the following subject.
Group:
VIDEO 1
Subject: H-CENT
PAL horizontal
center (DAC)
1. Receive the PAL monoscope pattern
l Using the A and v keys, make the
signal.
overscan just the same at right and
2. Press 52001 to call up the ADJ IN
left.
mode and select the following subject.
Group:
VIDEO 3
Subject: PAL-H-CENT
Contrast (DAC)
1. Receive the NTSC lo-step pattern
l Using the A and v keys, adjust the
(gamma
signal.
difference between the 100% white
correction on)
2. Apply 3.5 Vdc to pin (7) of P803 to turn
level and the pedestal level to
off the gamma corrector.
6.OkO.l Wp-p.
3. Connect an oscilloscope between pin
4
(2) of Pl401 and GND.
I
I
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