Sharp LC-26GA3E Service Manual page 42

LC-26GA3E
TROUBLE SHOOTING TABLE
Are there RGB signal inputs at pins
(25), (26) and (27), and Hsync/Vsync
signal inputs at pins (8) and (28) from
DVI connector (SC1900)?
YES
Are there Vsync and Hsync signal
outputs at pins (4) and (6) of
IC1904(INVERTER)?
YES
Are DV_/SR/SG/SB and DVI_H/V
signals sent from MD connector?
YES
Are DVI_SR/SG/SB and DVI_H/V
signals supplied to IC3700 (ADC) and
3701 (SYNC_SELECTOR) on the
main PWB?
YES
Check IC3700, IC3701 and their
peripheral circuits.
Image from DVI input does not appear (Analog AV is not displayed) (4)
NO
Are IC1911(E2PROM) data accessed
by I2C when connected to PC?
Are outputs at pins (12) and (14) of
IC1917(CONTROL) both (L, L)?
Do output pins (12) and (14) of
IC1917 become (H, H) when digital
PC mode is entered ?
Check ME connector I2C signal line.
NO
Check IC1904 and its peripheral
circuits.
NO
Check IC1901, IC1903 and their
peripheral circuits.
NO
Check MD harness for disconnection.
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YES
NO
YES
NO
YES
NO
Check PC settings.
Check IC1915 and its
peripheral circuits.
Check IC1917 and its
peripheral circuits.