Sharp LC-32GD4U Service Manual page 48

LC-32GD4U
LC-37GD4U
TROUBLE SHOOTING TABLE
DVI Input (Digital PC mode)(1)
Are there Rx0, Rx1, Rx2 and RxC
signal inputs to IC1900 (HDCP_LSI)?
YES
Are signals sent from Hsync (pin 18),
Vsync (pin 19) and RGB (pins 23, 26
and 31) of IC1900 ?
YES
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
Check IC3700, IC3701 and their
peripheral circuits.
NO
Are IC1915 data accessed by I2C
when connected to PC?
NO
YES
Are outputs at pins (12) and (14) of
IC1917 both (H, H)?
NO
YES
Do pins (12) and (14) become (L, L)
when analog AV mode is entered?
NO
YES
Check ME connector I2C signal line.
NO
Check IC1900 and its
peripheral circuits.
NO
Check IC1901, IC1903 and
their peripheral circuits.
NO
Check ME harness for
disconnection.
48
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YES
Check PC settings.
YES
Check IC1915 and its
peripheral circuits.
YES
Check IC1917 and its
peripheral circuits.