Sharp XV-C100U, Руководство по обслуживанию

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XV-C100U
19
ELECTRICAL ADJUSTMENT
No. Adjustment Item Adjustment Conditions Adjustment Procedure
1
NTSC free-
running
frequency
(R1616)
1.Receive the NTSC monoscope pattern
signal.
2.Hold down S801.
• Turn R1616 until the image appears
as specified.
1. Receive the NTSC 10-step pattern
signal.
2. Connect a dual-beam oscilloscope
between pin (2) of P1401 and GND.
3. Press S2001 to call up the ADJ IN
mode and select the following subject.
Group: VIDEO 2
Subject: SUB-BIAS
4. Using the
'
and
"
keys, put the
waveform to its proper shape.
5. Press S2001 again 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).
6. Adjust R861 to get the highest gain.
7. Finally select the following subject.
Group: VIDEO 1
Subject: CONT
• Using the
'
and
"
keys, adjust the
difference between the tenth-step
level and the pedestal level to
6.0±0.15 Vp-p.
Contrast (DAC)
(gamma
correction off)
5
4 Horizontal
center (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: P-H-CENT
• Using the
'
and
"
keys, make the
overscan just the same at right and
left.
Overscan: 91-97%
3
Horizontal
center (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.
Overscan: 91-97%
PAL free-
running
frequency
(R1602) 2
1. Receive the PAL monoscope pattern
signal.
2. Hold down S801.
• Turn R1602 until the image appears
as specified.
10