Sharp PG-A20X Service Manual page 35

Checking the RGB signal
Are the RGB signals
outputted from
pin (9), (7) and (4) of
IC3104? gradation signals?
NO
Are their RIN2-RIN9,
GIN2-GIN9, BIN2-BIN9
signals inputted into
IC2601?
YES
Are their signals inputted
into pins(37)-(46) of IC1101,
IC1201 and IC1301?
NO
Are their signals inputted
into pins (5)-(10) of
SC1101, SC1301 and into
pins (23)-(28) of SC1201?
YES
Are there input signals at
pins (3) of SC1101 and
SC1301 and pin
(30) of SC1201?
NO
Are there input signals at
pins (2) and (31) of
SC1101, SC1201 and
SC1301?
YES
Check the connection
of LCD panels.
And when video signal and
OSD are also not
disaplayed, replace the
LCD panels.
YES
Check IC3104 and its
peripheral circuits.
NO
Check IC8003 and its
peripheral circuits.
YES
Check IC2601 and its
peripheral circuits.
NO
Check IC1101, IC1201,
IC1301 and their peripheral
circuits.
YES
Check IC1101, IC1201,
IC1301 and their
peripheral circuits.
NO
Check IC1103 and its
peripheral circuits.
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PG-A20X