Sharp LC-22AD1E User Manual

16
LC-22AD1E
TROUBLE SHOOTING TABLE (Continued)
No picture
No picture at all
No TV, AV1, AV2 and AV3 output
No TV output
Check all the settings microprocessor’s adjust process menu.
Is in/output of IC801 normal?
Check lC801 and its peripheral parts.
Is in/output of IC4601 normal?
Check IC4601 and its peripheral parts.
Is in/out of IC4512 normal?
Check lC4512 and its peripheral parts.
Check LCD panel voltages and waveform.
Is in/output of lC2521 normal?
Check IC2521 and its peripheral parts.
Are input at pins (71), (72) and (73) of lC801 normal?
Check lC801 and its peripheral parts.
Are voltages at pins (6), (7) and (18) of tuner normal?
Check the power line.
Is output at pin (13) of tuner normal?
Check tuner and its peripheral parts.
Is intput at pin (23) of IC2521 normal?
Check the its line.
Check IC2521 and its peripheral parts.
No DTV output
When input source change as "TV" and "AV1" to "AV3", Does the LCD displays correct video?
Check the Main2 (power) part.
Yes
No
Yes
No
Yes
Yes
Is DTV menu displayed when press "DTV MENU" button?
Yes
Check the power line. (P3704 & opposite side)
Check cable insertion. (SC2500 & opposite side)
Does "Weak or missing signal" dialogue appears when antenna cable removes?
Yes
Yes
Yes
Yes
Yes
Yes
Exchange DTV unit. (Tuner part problem)
Is any service found by performing "Reinstall all services"?
Yes
Check antenna signal.
Try Software download via PC card.
Still no video? Exchange DTV unit. (DIgital unit problem)
No
No
No
No
No
Yes
No
Yes
No
No
Yes
No
Yes
No

Sharp LC-22AD1E Specifications

General

Brand	Sharp
Model	LC-22AD1E
Category	LCD TV
Language	English