Read Sharp LC-20C2E (serv.man3) Service Manual online
11
LC-20C2E
[6] Finish adjustment
6-1 Adjusting the common bias
1) Keep off the video input signal.
2) Place the specified instrument at the center of the screen.
3) Observe the instrument’s output using an oscilloscope.
4) Adjust the setting so that the peak-to-peak level of the waveform should be minimum.
2) Place the specified instrument at the center of the screen.
3) Observe the instrument’s output using an oscilloscope.
4) Adjust the setting so that the peak-to-peak level of the waveform should be minimum.
6-2. Adjusting the white balance
Adjust the “RCUTOFF” and “BCUTOFF” settings, given on page 2 of the MAIN adjustment process, to the
standard monitor settings.
Note: Adjust the “RCUTOFF” and “BCUTOFF” settings in the range of -10 through +10. If without this range, the
standard monitor settings.
Note: Adjust the “RCUTOFF” and “BCUTOFF” settings in the range of -10 through +10. If without this range, the
user-adjustable settings will be limited in their ranges. Do not change the “GCUTOFF” setting. (Otherwise
the black level will vary.)
the black level will vary.)
6-3. Checking the AGC gain
Receive the E-12CH signal. Call the TUNER adjustment process, and select “AGC gain start” in “other
adjustments”. Then call the MAIN adjustment process and check the “Y” setting on page 2. If the “Y” setting is
not in the range of B6 thru C1, modify the “AGC gain start” setting in the TUNER adjustment process to bring the
“Y” setting in such specified range.
adjustments”. Then call the MAIN adjustment process and check the “Y” setting on page 2. If the “Y” setting is
not in the range of B6 thru C1, modify the “AGC gain start” setting in the TUNER adjustment process to bring the
“Y” setting in such specified range.
[7] Inspection process
Once into the inspection process, the MCL data of each channel will be preset. When out of this process, the
MCL data will disappear.
MCL data will disappear.
R/C CODE
MLC1(R/C CODE 17)
TV-CH.
CH-No.
Fv(MHz) S-SYSTEM
1
JA-1
91.25
4.5
M
2
JA-2
97.25
4.5
M
3
JA-3
103.25
4.5
M
4
JA-4
171.25
4.5
M
5
JA-5
177.25
4.5
M
6
JA-6
183.25
4.5
M
7
JA-7
189.25
4.5
M
8
JA-8(US-10)
193.25
4.5
M
9
JA-9
199.25
4.5
M
10
JA-10(US-12)
205.25
4.5
M
11
JA-11
211.25
4.5
M
12
JA-12(US-10)
217.25
4.5
M
13
JA-13
471.25
4.5
M
14
JA-14(US-15)
477.25
4.5
M
15
US-2
55.25
4.5
M
16
US-4
67.25
4.5
M
17
US-6
83.25
4.5
M
18
US-69
801.25
4.5
M
19
871.1
4.5
M
20
E-2
48.25
5.5
B/G
21
OIR-2
59.25
6.5
D/K
22
OIR-3
77.25
6.5
D/K
23
OI-5
93.25
6.5
D/K
24
E-5
175.25
5.5
B/G
25
OI-9
199.25
6.5
D/K
26
E-10
210.25
5.5
B/G
27
E-12
224.25
5.5
B/G
28
I-23
487.25
6
I
29
E-34
575.25
5.5
B/G
30
OI-42
639.25
6.5
D/K
31
OI-58
767.25
6.5
D/K
32
I-69
855.25
6
I
Manufacturing base
LCD TV
Internal PAL/SECAM signal
JAPAN VHF CH
JAPAN UHF band edge LO CH
Internal signal
Internal signal
US-dedicated internal signal
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