Sharp XV-DW100U Service Manual page 39

TROUBLE SHOOTING TABLE
If there is no signal at P801
and P802, go to the video
system block.
Checking the output PWB unit
No
If there is no signal at SC8404
and SC8405, go to "Trouble
shooting table for PC I/F unit".
No
If there is no signal input at
pins (1) and (31) of SC1101,
SC1102 and SC1103, check
the switching circuit and
amplifier circuit of IC1101,
IC1201, IC1301, IC1102,
IC1202, IC1302 and their
peripheral circuits.
39
(Continued)
Are there signal inputs at
SC1404, SC1405, SC1501 and
SC1502?
Are voltages applied to EA
connectors and SC8404,
SC8405 and SC8502?
Yes
Are there signal outputs at
pins (17) of IC2102, IC2202,
IC2302?
Yes
Are there signal inputs at pin
(47) of IC1101, IC1102,
IC1201, IC1202, IC1301 and
IC1302?
Yes
Are there signal outputs at pins
(17), (19), (21), (27), (29) and
(31) of IC1101, IC1102,
IC1201, IC1202, IC1301 and
IC1302?
Yes
Are there signal inputs at
SC1101, SC1201 and
SC1301?
Yes
Yes
Check the R, G and B panels.
XV-DW100U
No
If there is no signal at EA
connector or SC8404, SC8405
and SC8502, go to Checking
the power unitblock.
No
Check IC2101, IC2202,
IC2302 and their peripheral
circuits.
No
Check IC2102, IC2202,
IC2302 and their peripheral
circuits.
No
Check IC1101,IC1201,IC1301
and their peripheral circuits.
No
If there is no signal input at
pins (15) and (30) of
SC1101, SC1102 and
SC1103, check IC1603,
IC1601 and their
peripheral circuits.
Check IC1611, IC1612,
IC1613, IC1615 and their
peripheral circuits.