Sharp Aquos LC-32GD4U, Service Manual

Page: 49 / 222

49
LC-32GD4U
LC-37GD4U
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)?
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, L)
when digital AV mode is entered?
NO
YES
Check ME connector I2C signal line.
Are IC1915 data accessed by I2C
when connected to PC?
Check ME harness for
disconnection.
DVI Input (Analog PC mode)(2)
Check IC3700, IC3701 and their
peripheral circuits.
YES
Are there Vsync and Hsync signal
outputs at pins (4) and (6) of
IC1904(INVERTER)?
Are DVI_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