Sharp LC-22AD1E - Page 17

17
LC-22AD1E
TROUBLE SHOOTING TABLE (Continued)
No picture
No SCART1 (AV1) output
No SCART2 (AV2) output
No S-Video (AV3) output
Check all the settings microprocessor’s adjust process menu.
Is output at pin (17) of IC2521 normal?
Check the IC2521 and its peripheral parts.
Check the IC2522, AV1 line (SC1- OUT-V) and their peripheral
Is input at pin(27) of IC2521 normal?
Check the AV1 line (SC1-IN-V) and their peripheral parts.
Is output at pin (13) of IC2521 normal?
Check the IC2521 and its peripheral parts.
Check the IC2523, (SC2-OUT-V) and their peripheral parts.
Is input at pins (5) and (7) of IC2521 normal?
Check the (SC3-IN-Y) line, (SC3- IN-C) line and their peripheral parts.
No line output
Is input at pin (70)(72) of IC801normal?
Check the (SY-OUT) line and their peripheral parts.
Yes
No
Yes
No
Yes
Yes
No
No
Is input at pin (73) of IC801 normal?
Check the V-PAL line and their peripheral parts.
No
No
No TELETEXT output
Is input at pins (1), (2) and (3) of IC801 normal?
Check IC801 and its peripheral parts.
Yes
Is output at pins (3), (5) and (6) of IC1630 normal?
Yes
Is output at pins (57) ~ (60) of IC1601 normal?
Check the its line.
No
Yes
Is input at pin (21) of IC1601 normal?
Check IC1601, IC1604 and their peripheral parts.
No
Yes
Check the its line. (RMD1/TXD1)
No
Is input at pin(29) of IC2521 normal?
Check the AV2 line (SC2-IN-V) and their peripheral parts.
Yes
No