Read Sharp LC-20B4E (serv.man8) Service Manual online
19
LC-20B4E
TROUBLE SHOOTING TABLE
(Continued)
No picture (3/3)
Check all the settings microprocessor's adjust process menu.
Is output of
R0~R7
normal?
Is output of
G0~G7
normal?
Is output of
B0~B7
normal?
Yes
Yes
No
No
No
Colour is
unusual
Is in/output of
SPIO and
SPOI normal?
No
No picture
image
inversion
No
Gradation
defect
Is output of U/D
normal?
Yes
No
Check R1227 and
its peripheral parts.
Check R1235 and
its peripheral parts.
Check IC1202,
Q1204 and their
peripheral parts.
Check R1228 and
its peripheral parts.
Check R1232 and
its peripheral parts.
Is output V0, V7, V21,
V64, V112, V176,
V235 and V255
normal?
Check IC1101 and its
peripheral parts.
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