Sharp LC-22AD1E - Page 20

20
LC-22AD1E
TROUBLE SHOOTING TABLE (Continued)
No sound
No sound from speakers
No sound from headphone
No sound from external speaker
Check all the microprocessor’s adjust process menu.
Is pin (60) of IC3501 at "H"?
Check IC3501 and its peripheral parts.
Is pin (43) of IC3501 at "L"?
Check Q3508, P101, P3501 harness and their peripheral parts.
Is pin (70) of IC3501 at "H"?
No sound from SCART1 output line
No sound from SCART2 output line.
Is output at pins (36) and (37) of IC3202 normal?
Is output at pins (33) and (34) of IC3202 normal?
Yes
No
Are input and output of IC3202 as specified?
Check IC3202, IC3403, IC3402, IC3405 and their peripheral parts.
Yes
No
Are output at pins (1) and (7) of IC3408 as specified?
Check IC3408 and its peripheral parts.
Yes
No
Are output between pins (2) and (3) and between pins (6) and (7) of P3402 as specified?
Check 1-Bit amp and their peripheral parts.
Yes
No
Is pin (48) of IC3501 at "H"?
Check Q3401, RY3401 and their peripheral parts.
Yes
No
Check speakers and their peripheral parts.
Yes
Yes
Yes
No
Is pin (58) of IC3501 at "L"?
Check D3204, Q3202 and their peripheral parts.
Yes
No
Yes
Yes
Yes
Are input and output of IC3203 as spedfied?
Check IC3202, IC3203 and their peripheral parts.
Yes
No
Check the headphone and its peripheral parts.
No
Check Q3407, RY3403 and their peripheral parts.
Check SCART1 periphery parts.
Check SCART2 periphery parts.
No sound from PHOTO Audio out.
Is output at pin (12) of IC2510 normal?
Check the "I2S-DA- OUT" line.
Yes
No
Yes
Check IC1101 and its peripheral parts.
Check the "TBUS" line and their peripheral parts.
Is a speaker setup of "Speaker" set as "External" ?