Sharp PG-C20XU, PG-C20XE Handbuch Seite 35

Checking the output line
Are there video input signals at
TP1401, TP1402 and TP1403?
YES
Are there video output signals at
pins (14), (16) and (18) of IC1405?
YES
Are there video input signals at pins
(45) of IC1101, IC1201, IC1301,
IC1102, IC1202 and IC1302?
YES
Are there clock input signals (MCLK) at
pins (54) and (55) of IC1102, IC1202
and IC1302?
YES
Are there output signals at pins (17),
(19), (21), (28), (30) and (32) of IC1101,
IC1201, IC1301, IC1102, IC1202 and
IC1302?
YES
Are signals going to the control signal
lines at pins (3) thru (21) of IC1103,
IC1203 and IC1303?
YES
Are signals coming from the control signal
lines at pins (11) thru (17) of IC1402 and
IC1404?
YES
Are there input signals at SC1101,
SC1201 and SC1301?
YES
Check the R, G and B panels.
NO
Check P8001 and SC1701 for solder
cracks.
Are there video output signals at pins
(42), (44) and (46) of IC8024?
Are there digital input signals at pins
(1) thru (33) of IC8024?
IC8023 defective. Replace the PC
interface.
NO
Check IC1405, IC1403 and their
peripheral circuits.
Check IC1102, IC1202, IC1302 and
NO
their peripheral circuits as well as
pins (35) and (36) and the 15.5V
power line.
Check P8001 and SC1701 for solder
NO
cracks, and go to "Checking the
digital signal processing circuit".
Check IC1101, IC1201, IC1301,
NO
IC1102, IC1202, IC1302, IC1401,
IC1403, IC1405 and their peripheral
circuits.
Check P8001 and SC1701 for solder
NO
cracks, and go to "Checking the
digital signal processing circuit".
NO
Check IC1402, IC1404 and their
peripheral circuits.
NO
Check SC1101, SC1202, SC1301
and their peripheral circuits.
35
YES Check Q8013, Q8014,
Q8015 and their
peripheral circuits.
NO
YES
NO
PG-C20XU
PG-C20XE
AN-Z7T
Check IC8024 and
IC8025.
IC8023 defective.
Replace the PC
interface.
IC8023 defective.
Replace the PC
interface.