Sharp Notevision PG-A20X, Service Manual

Page: 35 / 124

35
PG-A20X
YES
YES
NO
YES
YES
NO
YES
YES
NO
Checking the RGB signal
Are their RIN2-RIN9,
GIN2-GIN9, BIN2-BIN9
signals inputted into
IC2601?
Check IC8003 and its
peripheral circuits.
Are the RGB signals
outputted from
pin (9), (7) and (4) of
IC3104? gradation signals?
Check IC3104 and its
peripheral circuits.
NO
Are their signals inputted
into pins(37)-(46) of IC1101,
IC1201 and IC1301?
Check IC2601 and its
peripheral circuits.
NO
Are there input signals at
pins (2) and (31) of
SC1101, SC1201 and
SC1301?
Check IC1103 and its
peripheral circuits.
Are there input signals at
pins (3) of SC1101 and
SC1301 and pin
(30) of SC1201?
Check IC1101, IC1201,
IC1301 and their
peripheral circuits.
NO
Check the connection
of LCD panels.
And when video signal and
OSD are also not
disaplayed, replace the
LCD panels.
Are their signals inputted
into pins (5)-(10) of
SC1101, SC1301 and into
pins (23)-(28) of SC1201?
Check IC1101, IC1201,
IC1301 and their peripheral
circuits.