Sharp LC-26GA4D, Service Manual

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41
LC-26GA4D
LC-26GA4U
TROUBLE SHOOTING TABLE
(Continued)
NO YES
YES
YES
NO
NO
NO
NO
NO
Are there Rx0, 1, 2 and C signal
inputs to IC1900?
Are there Hsync, Vsync and RGB
DAC signal outputs from IC1900?
Are there RGB, Hsync and Vsync
signal outputs from MD connector?
Are outputs at pins (12) and (14) of
IC1917 both (H, H)?
Check PC settings.
Check IC1915 and its
peripheral circuits.
Check IC1917 and its
peripheral circuits.
Check IC1900 and its
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
Do pins (12) and (14) become (L, L)
when analog 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 the main PWB
IC3700 and IC3701?
Check MD harness for
disconnection.
YES
Check IC3700, IC3701 and their
peripheral circuits.
YES
DVI Input (Digital PC mode)