Read Sharp XV-C2E (serv.man3) Service Manual online
XV-C2E
16
No.
Adjustment Item
Adjustment Conditions
Adjustment Procedure
7
Horizontal
center
adjustment
(NTSC)(DAC)
center
adjustment
(NTSC)(DAC)
1. Receive the NTSC monoscope pattern
signal.
2. Press S2001 to call up the ADJ IN
mode and select the following subject.
Group : VIDEO 1
Subject : H-CENT
• Using the
'
and
"
keys, make the
overscan just the same at right and
left.
left.
8
Horizontal
center
adjustment
(PAL)(DAC)
center
adjustment
(PAL)(DAC)
1. Receive the PAL monoscope pattern
signal.
2. Press S2001 to call up the ADJ IN
mode and select the following subject.
Group :
VIDEO 1
Subject : PAL-H-CENT
• Using the
'
and
"
keys, make the
overscan just the same at right and
left.
left.
9
Contrast (DAC)
(gamma
correction off)
(gamma
correction off)
1. Receive the NTSC 10-step pattern
signal.
2. Connect the dual-beam oscilloscope
between pin (3) of P4201 and GND.
3. Press S2001 to call up the ADJ IN
mode and 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).
entry of 0 (zero).
4. Adjust R861 to get the highest gain.
5. Finally select the following subject.
Group:
VIDEO 1
Subject: CONT
• Using the
'
and
"
keys, adjust the
difference between the 100% white
level and the pedestal level to
1.75±0.05 Vp-p.
level and the pedestal level to
1.75±0.05 Vp-p.
1. Receive the NTSC 10-step pattern
signal.
2. Connect the dual-beam oscilloscope
between pin (5) of P4201 and GND.
3. Put the video mode to the standard
setting.
10
Automatic gain
control (R861)
control (R861)
1. Receive the NTSC 10-step pattern
signal.
2. Connect the dual-beam oscilloscope
between pin (3) of P4201 and GND.
• Turn R861 so that the difference
between the 100% white level and the
pedestal level be 1.35±0.05 Vp-p.
pedestal level be 1.35±0.05 Vp-p.
11
D/A output level
adjustment
adjustment
• Turn R4270 so that the difference
between the 100% white level and the
pedestal level be 0.7±0.05 Vp-p.
pedestal level be 0.7±0.05 Vp-p.
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