Read Sharp LC-121M2E (serv.man3) Service Manual online
11
LC-121M2E
LC-150M2E
LC-150M2E
LC-121M2E
LC-150M2E
LC-150M2E
5-6-2. AV input Adjustment
Adjustment
Adjustment conditions
Adjustment method
1
Brightness adjustment
1. Input the standard colour bar signal
1. Adjust N358 BRIGHTNESS, and
(N358)
(the same pattern as that of JPN-8CH)
adjust the black level of G output so
of N358 into AV1.
as to get DC 1.5
±
0.05V.
2. Connect the oscilloscope to TP821
(IC803, pin7, G output).
2
R-cut off adjustment
1. Input the standard colour bar signal
1. Adjust R CUTOFF so as to equalize
(the same pattern as that of JPN-8CH)
the black levels of green and red.
of N358 into AV1.
2. Connect the oscilloscope to TP821
(IC803, pin7, G output).
3. Connect the oscilloscope to TP819
(IC803, pin1, R output).
3
B-cut off adjustment
1. Input the standard colour bar signal
1. Adjust B CUTOFF so as to equalize
(the same pattern as that of JPN-8CH)
the black levels of green and blue.
of N358 into AV1.
2. Connect the oscilloscope to TP821
(IC803, pin7, G output).
3. Connect the oscilloscope to TP820
(IC803, pin8, B output).
4
Unicolor adjustment
1. Input the standard colour bar signal
1. Adjust N358UNICOLOR, and
(N358)
(the same pattern as that of JPN-
adjust so as to get 100% white-
8CH) of N358 into AV1.
black level video component equal
2. Connect the oscilloscope to TP821
to 2.3
±
0.05Vp-p.
(IC803, pin7, G output).
5
R DRIVE adjustment
1. Input the standard colour bar signal
1. Adjust so as to get 100% white level
(the same pattern as that of JPN-
identical with that of green.
8CH) of N358 into AV1.
2. Connect CH1 of oscilloscope to
TP821 (G output).
3. Connect CH2 of oscilloscope to
TP819 (R output).
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