Sharp LC-121M2E Service Manual page 11

LC-121M2E
LC-150M2E
5-6-2. AV input Adjustment
aioe Adjustment Adjustment conditions Adjustment method
1 | Brightness adjustment 1. Input the standard colour bar signal | 1. Adjust N858 BRIGHTNESS, and
(N358) (the same pattem 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).
. Input the standard colour bar signal
(the same pattem as that of JPN-8CH)
of N358 into AV1.
2. Connect the oscilloscope to TP821
(IC803, pin7, G output).
3. Connect the oscilloscope to TP819
(IC803, pini, R output).
. Input the standard colour bar signal
(the same pattem as that of JPN-8CH)
of N358 into AV1.
2. Connect the oscilloscope to TP821
(1C803, pin7, G output).
3. Connect the oscilloscope to TP820
(IC803, pin8, B output).
. Input the standard colour bar signal
(the same pattern as that of JPN-
8CH) of N358 into AV1.
2. Connect the oscilloscope to TP821
(IC803, pin7, G output).
1. Adjust R CUTOFF so as to equalize
the black levels of green and red.
R-cut off adjustment
1. Adjust B CUTOFF so as to equalize
the black levels of green and blue.
B-cut off adjustment
1. Adjust N358UNICOLOR, and
adjust so as to get 100% white-
black level video component equal
to 2.3£0.05Vp-p.
Unicolor adjustment
(N358)
+£0.05Vp-p
R DRIVE adjustment 1. Adjust so as to get 100% white level
identical with that of green.
. Input the standard colour bar signal
(the same pattern as that of JPN-
8CH) of N358 into AV1.
. Connect CH1 of oscilloscope to
TP821 (G output).
. Connect CH2 of oscilloscope to
TP819 (R output).
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