Sharp LC-37AD1E Service Manual page 48

LC-37AD1E
(AVC System)
(PC I/F Unit)
In the case of TV, video and component system
MAIN in one-screen mode or two-screen
mode
Is the input to pins (139), (124) and (133)
of IC10004 normal?
YES
Check CN10007 and the
peripheral circuitry.
Is the digital output section of IC10004
normal?
YES
Check IC10004 and the
peripheral circuitry.
Is the digital output from IC10025 normal?
YES
Check IC10025 and the
peripheral circuitry.
Note: The Ref.
No. of the PC I/F unit is REF.1XXXX.
No picture comes out.
SUB in two-screen mode
Is the input to pins (3), (2) and (1) of
IC10426 normal?
NO YES
Check CN10007 and the
peripheral circuitry.
Is the digital output section of IC10426
normal?
NO
YES
Check IC10426 and the
peripheral circuitry.
NO
Is the signal applied to pins (21), (22),
(24), (25), (27), (28), (30) and (31) of
IC10413?
Check the display side.
Is the input to pins (141), (126) and (136)
of IC10004 normal?
NO YES
Is the digital output section of IC10004
normal?
NO
YES
Is the digital output from IC10025 normal?
YES
NO
Check the parts in the PC I/F unit.
YES
48
In the case of PC system
NO
Check CN10008 and the
peripheral circuitry.
NO
Check IC10004 and the
peripheral circuitry.
NO
Check IC10025 and the
peripheral circuitry.