Sharp LC-121M2E Service Manual page 10

LC-121M2E
LC-150M2E
| 8 |DAC2 ich
DAC 2 2ch
DAC 2 3ch
Gece
mer
| | DAC2 4ch
| [Dace Sch
| [DAC 2 6ch
| DAC 2 7h
| | DAC? Bch
| DAC 2 och
| [DAC 2 toch
| | DAC? t1ch_
| [pace tzch
5-6. Service Adjusting
5-6-1. Basic Adjustment
|| Adjustment Adjusting conditions
1 | +B Adjustment 1. Connect the DC voltmeter to
TP1104
- Model setup
/ Counter-bias adjustment
Adjusting method
1. Adjust +B-ADJ to 5.1V + 0.05V.
( DAC 9ch )
1. Make sure that M2H has been set.
(Not setting M2E)
When M2H is selected, the item
settings are as follows.
TUNER OFF
AUDIO MULTIPLEX OFF
BOOSTER 0
SYSTEM AUTO
COPY GUARD ON
CH MEMORY OFF
SECAM ON
MULTI LANG. OFF
TIMER OFF
. Set the AV1 mode to set signal
noninput state.
2. Fit the specified adjusting instrument
to the screen center.
3. Observe the adjusting instrument
output on the oscilloscope.
1. Adjust COM so as to minimize the
waveform peak-peak.
(DAC7ch)
NTSC / PAL-MOSC
adjustment
. Input the monoscope pattern of
NTSC into AV1.
1. Adjust NTSC/PALM OSC so as to
get the normal screen.
(DAC8ch)
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