Sharp LC-32GA3E Service Manual page 42

LC-32GA3E
LC-37GA3E
TROUBLE SHOOTING TABLE
<Signal mode>
Are there Rx0, 1, 2 and C signal
inputs to IC1900 (HDCP_LSI)?
YES
Is each signal 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.
Image from DVI input does not appear (digital PC is not displayed) (1)
NO
Are IC1915 data accessed by I2C
when connected to PC?
Are outputs at pins (12) and (14) of
IC1917 both (H, H)?
Do output pins (12) and (14) of
IC1917 become (L, L) when analog
AV mode is entered?
Check ME connector I
NO
Check IC1900 and its peripheral
circuits.
NO
Check IC1901, IC1903 and their
peripheral circuits.
NO
Check MD harness for disconnection.
42
(Continued)
YES
Check PC settings.
NO
YES
Check IC1915 and its
peripheral circuits.
NO
YES
Check IC1917 and its
peripheral circuits.
NO
2
C signal line.