LC-40D68UT
6 – 6
No video (5)
No video at UHF/VHF broadcast signal reception
No video at digital broadcast signal reception
Is the specified TV signal selected on the input select menu screen?
Is there the analog video signal output (VIDEO) at pin (19) of tuner
(TU1101)?
Are there the video signal outputs (IF_P/N) at the pins (12) and (13) of
tuner (TU1101)?
YES
NO
YES
NO
Check the Tuner I2C lines.
1) TU1101: pin (8) (TUN_SDA_C5), pin (9)
(TUN_SCL_C5)
2) SC1101/SC1201: pin (16), pin (15)
3) IC8001: pin (F2), pin (E1)
Check the Tuner I2C lines.
1) TU1101:pin (8) (TUN_SDA_C5), pin (9) (TUN_SCL_C5)
2) SC1101/SC1201: pin (16), pin (15)
3) IC8001: pin (F2), pin (E1)
Check TU1101 and its peripheral circuits.
Check TU1101 and its peripheral circuits.
Is there the analog video signal input at pin (B11) of IC8001
(CPU)?
Are there the video signal inputs at pin (A4)/(B4) (IF_P/N) of IC8001
(CPU)?
Are there IF-AGC signal inputs at pin (F1) of IC8001 (CPU)?
YES
NO
YES
NO
Check the line between IC8001 and TU1101, and their
peripheral circuits.
1) TU1101: pin (19)
2) SC1101/SC1201: pin (3)
3) IC8001: pin (B11)
Check the line between IC8001 and TU1101, and their periph-
eral circuits.
1) TU1101: pin (12) (IF_P), pin (13) (IF_N), pin (14) (IF_AGC)
2) SC1101/SC1201: pin (5), pin (6), pin (10)
3) IC8001:pin (A4), pin (B4), pin (F1)
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)
NO
Check IC8001 and its peripheral circuits.
(IC8251, etc.)
YES
Check the panel module.