Sharp LC-32AX3H - Page 25

LC-32AX3H/M/X
LC-37AX3H/M/X
25
TROUBLE SHOOTING TABLE (Continued)
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
NO
*B: Go back to "No video onscreen (1)".
Is INPUT 1 selected on the input select menu screen?
Select INPUT 1 on the input select menu
screen to pick up the right input signal.
Are there the Y, Pb and Pr signal inputs at pins (21), (23) and (25) of
IC1203 (AV SWITCH), respectively?
Check the line between pins (10)/(6)/(4) of
J1201 and pins (21)/(23)/(25) of IC1203.
No external input video onscreen <INPUT 1>
Is INPUT 2 selected on the input select menu screen?
Select INPUT 2 on the input select menu
screen to pick up the right input signal.
Are there the Y, Pb and Pr signal inputs at pins (27), (29) and (31) of
IC1203 (AV SWITCH), respectively?
Check the line between pins (10)/(6)/(4) of
J1202 and pins (27)/(29)/(31) of IC1203.
No external input video onscreen <INPUT 2>
Is INPUT 4 selected on the input select menu screen?
Select INPUT 4 on the input select menu
screen to pick up the right input signal.
Are there the signal inputs from the HDMI (SC1900) connector to the
following input terminals of IC1904 (HDCP LSI): RR1XC
± signal at pins
(58) and (59), RR1X0
± signal at pins (62) and (63), RR1X1
± signal at
pins (66) and (67), RR1X2
± signal at pins (70) and (71)?
With an HDMI device connected, is IC1902
(EEPROM) accessed by I2C and is the DDC I2C
CLOCK/DATA data read?
Are there the HDMI Y, HDMI Pb and HDMI Pr signal outputs at pins
(17), (20) and (14) of IC1904, respectively?
Check IC1904 and its peripheral circuits.
Are there the Y, Pb and Pr signal inputs at pins (39), (41) and (43) of
IC1203 (AV SWITCH), respectively?
Check the line between pins (17)/(20)/(14) of J1904
and pins (39)/(41)/(43) of IC1203.
Check IC1902 and its peripheral circuits.
No external input video onscreen <INPUT 4>
With <Component> signal input No video onscreen (2)
Are there the Y, Pb and Pr signal outputs at pins (60), (59) and (58) of IC1203, respectively?
Check IC1203 and its peripheral circuits.
Are there the Y, Pb and Pr signal inputs at pins (246), (232) and (225) of IC3301 (VIDEO PROCESSOR), respectively?
Check the line between IC1203 and IC3301.
Check also Q3707 and Q3708 for the Y signal, Q3709 and
Q3710 for the Pb signal, and Q3711 and Q3712 for the Pr
signal, as well as their peripheral circuits.