Sharp Aquos LC 26GD4U, Service Manual

Page: 48 / 207

48
LC-26GD4U
TROUBLE SHOOTING TABLE
(Continued)
NO YES
YES
YES
NO
NO
NO
NO
NO
Are there RGB signal inputs at pins
(25), (26) and (27), and Hsync/Vsync
signal inputs at pins (28) and (8) from
DVI connector?
Are there Vsync and Hsync signal
outputs at pins (4) and (6) of IC1904?
Are there RGB, Hsync and Vsync
signal outputs from MD connector?
Are outputs at pins (12) and (14) of
IC1917 both (H, L)?
Check PC settings.
Check IC1915 and its
peripheral circuits.
Check IC1917 and its
peripheral circuits.
Check IC1904 and its
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
Do pins (12) and (14) become (L, H)
when digital AV mode is entered?
NO
YES
YES
Check ME connector I
2
C signal line.
Are IC1915 data accessed by I
2
C
when connected to PC?
Are there RGB, Hsync and Vsync
signal inputs to IC3700 and IC3701
of the main PWB?
Check MD harness for
disconnection.
YES
Check IC3700, IC3701 and their
peripheral circuits.
YES
DVI Input (Analog PC mode)