Sharp LC-22AD1E - Page 21

21
LC-22AD1E
TROUBLE SHOOTING TABLE (Continued)
No sound
TV sound failure
DTV Sound failure
Check all the settings microprocessor’s adjust process menu.
Is output at pin (13) of tuner (TU1101) as specified?
Check the tuner and its peripheral parts.
Is input at pin (67), (69) of IC3202 as specified?
Are TV and INPUT1-4 output the correct sound?
Yes
Yes
No
Yes
Is S/PDIF audio output working?
Yes
Does "Weak or missing signal" dialogue appears when antenna cable removes?
Yes
Yes
If any service found by performing "Reinstall all service" ?
Yes
Try Software download via PC card.
Exchange DTV unit. (Digital unit problem)
Yes
Still no sound?
Yes
Yes
Still no sound?
Check the MAIN2 (POWER) part.
Check the S/PDIF line. (P2502 & opposite side)
Exchange DTV unit. (Tuner part problem)
Check antenna signal.
No
Check cable insertion. (SC2500 & opposite side)
No
No
No
No
Check IC3202, X3201 and their peripheral parts.
Yes
Check Q1101, Q1102, Q2200, Q2201, Q2202, Q2203 and their peripheral parts.