Sharp XG-NV2SB Service Manual page 37

TROUBLE SHOOTING TABLE
If there is no signal at SC1501
and SC1502, go to the video
system block.
Checking the output PWB unit
No
If there is no signal at P1404
and P1405, go to "Trouble
shooting table for PC I/F unit".
No
If there is no signal input at
pins (1) and (24) of SC1101,
SC1201 and SC1301, check
the switching circuit and
amplifier circuit of IC1113,
IC1213 and IC1313, and their
peripheral circuits.
No
Check the circuit of R.G.B.
panel before feeding.
(Continued)
Are there signal inputs at
P1404, P1405, SC1501 and
SC1502?
Are voltages applied to EA
connectors?
Yes
Are there signal outputs at pins
(30) and (40) of IC1109,
IC1209 and IC1309?
Yes
Are there signal inputs at pin
(16) of IC1111, IC1211 and
IC1311?
Yes
Are there signal outputs at pins
(23), (25), (27), (33), (35) and
(37) of IIC1111, IC1211 and
IC1311?
Yes
Are there signal inputs at
SC1101, SC1201 and
SC1301?
Yes
Yes
Is the R.G.B. panel signal fed?
Yes
Check the R.G.B. panel.
37
XG-NV2SB
No
If there is no signal at EA
connector, go to "Checking
the power unit block.
No
Check IC1109, IC1209,
IC1309 and their peripheral
circuits.
No
Check the switching circuit of
IC1104, IC1204, IC1304 and
their peripheral circuits, as well
as the amplifier circuit of
IC1102, IC1202 and IC1302
and their peripheral circuits.
No
Check the input and output
signals at IC1106, IC1206 and
IC1306. Check also IC1111,
IC1211, IC1311 and their
peripheral circuits.
No
If there is no signal input at
pins (8) and (23) of
SC1101, SC1201 and
SC1301, check IC5509
and their peripheral
circuits.
Check IC1406, IC1408
and their peripheral
circuits.