Sharp Aquos LC-20B4E, Service Manual

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18
LC-20B4E
TROUBLE SHOOTING TABLE
(Continued)
No picture (2/3)
Check all the settings microprocessor's adjust process menu.
Is input at pin (14) of IC806 normal?
Check the V2_V line and its peripheral parts.
No
No VIDEO 1 output
Check the SY-line, SC-line and their peripheral parts.
Is input at pin (9) of IC806 and pin (1) of IC803 normal?
No
No S-VIDEO output
Check IC1201 and its peripheral parts.
No
Yes
Yes
No TELETEXT output
Is input at pins (136), (137), (138), and (142) of IC1201 normal?
No
Check the R, G and B line.
Is output at pins (57)~(59) of IC1601 normal?
No
Yes
Check V2VO line and its peripheral parts.
Is input at pin (21) of IC1601 normal?
Check IC1601 and its peripheral parts.