Sharp LC-26GA3E, Service Manual

Page: 40 / 154

40
LC-26GA3E
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 (SC1900)?
Is each signal sent from Hsync and
Vsync (pin 4, 6), of IC1904
(INVERTER)?
Are DVI_SR/SG/SB and DVI_H/V
signals sent from MD connector?
Are outputs at pins (12) and (14) of
IC1917(CONTROL) 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 output pins (12) and (14) of
IC1917 become (L, L) when digital
AV mode is entered?
NO
YES
YES
Check ME connector I2C signal line.
Are IC1915(E2PROM) data accessed
by I2C when connected to PC?
Are DVI_SR/SG/SB and DVI_H/V
signals supplied to IC3700 (ADC)
and 3701 (SYNC_SELECTOR) on
the main PWB?
Check MD harness for disconnection.
YES
Check IC3700, IC3701 and their
peripheral circuits.
YES
Image from DVI input does not appear (Analog PC is not displayed) (2)