Read Sharp XG-XV2E (serv.man2) Service Manual online
47
XG-XV2E/M/A
TROUBLE SHOOTING TABLE
(Continued)
Lamp does not light up
No
Yes
Replace the lamp. Does the new
lamp light up?
lamp light up?
Lamp was defective.
Yes
Yes
Yes
No
No
Is voltage of over 200V supplied
across C1701?
across C1701?
Is F701 blown out?
Yes
No
Is voltage of over 12V supplied
across C722?
across C722?
Replace F701, take out JW lead
and turn on the power. Does the
LED lights up in green?
and turn on the power. Does the
LED lights up in green?
Yes
Replace F1701.
Is F1701 open?
Q1701 or Q1702 defective.
Replace it.
Replace it.
No
Check IC2001.
Yes
Is voltage of over 3V supplied to
pins (1) thru (4) of EB connector?
pins (1) thru (4) of EB connector?
Power unit in trouble. Check the
output pins of EA, EB and EC
connectors for short-circuit or
voltage drop.
output pins of EA, EB and EC
connectors for short-circuit or
voltage drop.
No
Q1707 or PC1702 defective.
Replace it.
Replace it.
Yes
Is voltage of over 1V supplied to
pins (4) thru (7) of CN101?
pins (4) thru (7) of CN101?
Q701 defective. Replace it.
Replace the sub PWB or check its
internal elements.
internal elements.
No
No
Checking the throughout circuit
Yes
No
Digital output not acceptable.
Yes
No
Are LCP and monitor interconnected
with an appropriate cable?
with an appropriate cable?
Use an appropriate cable.
Yes
No
Are LCP and monitor in sync?
IC3003, IC3004 or IC3005 or their
peripheral circuits in trouble.
peripheral circuits in trouble.
IC3001 or its peripheral circuits in
trouble.
trouble.
Is analog output coming from PC?