Sharp LC-26GA4D Service Manual page 44

LC-26GA4D
LC-26GA4U
TROUBLE SHOOTING TABLE
DVI Input (Analog AV mode)
Are there RGB signal inputs at pins
(25), (26) and (27), and Hsync/Vsync
signal inputs at pins (8) and (28) from
DVI connector?
YES
Are there Vsync and Hsync signal
outputs at pins (4) and (6) of IC1904?
YES
Are there RGB, Hsync and Vsync
signal outputs from MD connector?
YES
Are there RGB, Hsync and Vsync
signal inputs to IC3700 and IC3701
of the main PWB?
YES
Check IC3700, IC3701 and their
peripheral circuits.
NO
Are IC1911 data accessed by I
when connected to PC?
Are outputs at pins (12) and (14) of
IC1917 both (L, L)?
Do pins (12) and (14) become (H, H)
when digital PC mode is entered?
Check ME connector I
NO
Check IC1904 and its
peripheral circuits.
NO
Check IC1901, IC1903 and
their peripheral circuits.
NO
Check MD harness for
disconnection.
44
(Continued)
2
YES
C
NO
YES
NO
YES
NO
2
C signal line.
Check PC settings.
Check IC1915 and its
peripheral circuits.
Check IC1917 and its
peripheral circuits.