Troubleshooting Table - Sharp LC-40D68UT Service Manual

LC-40D68UT
CHAPTER 6.
LC-40D68UT

TROUBLESHOOTING TABLE

[1] TROUBLESHOOTING TABLE
COMPOSITE: No external input video [INPUT-1]
Is INPUT-1 selected on the input select menu screen?
Select INPUT-1 on the input select menu screen for
the right input signal.
Does the INPUT-1 V1_PLUG detection function?
Check the line between pin (2) of input terminal (J509)
and pin (L1) of IC8001 (CPU).
1) J509: pin (2)
2) SC501/SC601: pin (20)
3) IC8001: pin (L1)
YES
Is there the COMPOSITE signal input at pin (A12) of IC8001
(CPU)?
Check the line between pin (3) of J509 and pin (A12) of
IC8001.
1) J509: pin (3)
2) SC501/SC601: pin (12)
3) IC8001: pin (A12)
YES
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of
IC8001?
LV0OUT0P/M (N19/N20), LV0OUT1P/M (N21/N22), LV0OUT2P/M (P19/P20),
LV0OUT3P/M (R19/R20), LV0OUT4P/M (R21/R22), LV0CK0P/M (P21/P22),
LV1OUT0P/M (J21/J22), LV1OUT1P/M (K19/K20), LV1OUT2P/M (K21/K22),
LV1OUT3P/M (L21/L22), LV1OUT4P/M (M21/M22), LV1CK0P/M (L19/L20)
YES
Check the panel module.
No video (1)
NO
NO
NO
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Service Manual
COMPOSITE: No external input video [INPUT-3]
Is INPUT-3 selected on the input select menu screen?
Select INPUT-3 on the input select menu screen for the right
input signal.
Does the INPUT-3 V3_PLUG detection function?
Check the line between pin (7) of input terminal (J501) and pin
(M1) of IC8001(CPU).
1) J501: pin (7)
2) SC501/SC601: pin (19)
3) IC8001: pin (M1)
YES
Is there the COMPOSITE signal input at pin (A11) of IC8001 (CPU)?
Check the line between pin (6) of J501 and pin (A11) of
IC8001.
1) J501: pin (6)
2) SC501/SC601: pin (10)
3) IC8001: pin (A11)
YES
NO Check IC8001 and its peripheral circuits.
(IC8251, etc.)
NO
NO
NO