Sharp AQUOS LC-19D45U, Service Manual, Page: 52 / 126

52
LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U
TROUBLESHOOTING TABLE (Continued)
No video output from PC input (INPUT4)
Are signal fed from pins 1,2,3(Analog-R/G/B),and 13,14(H Sync/V Sync) of input terminal (SC401) to pins U2, N3, R, K1, J1 of
IC801 (C4US)?
No
Check peripheral circuits of IC801 and Q402,Q405,Q406.
Digital broadcasting cannot be received.
[FRONT-END SECTION]
Yes
Are IF_OUT_P/N signal send from
pin (20) (19) of TU1101 respectively?
No
No
Are signal fed to pins Y1, A1
of IC801? Check signal from A6, A1, E1, E2, W5,
W6, W7, Y6, AA6 of IC801 normal?
Check IC801 and peripheral circuits.
Check IC9201 and peripheral circuits.
Yes
Yes
No
Check the TU1101.
Check between TU1101 and
IC801.
Yes
Yes
Yes
No
Yes
Are signals from A6, A1, E1, E2, W5, W6, W7, Y6, AA6 of
IC801 normal?
Check IC9201 and peripheral circuits.
Check IC801 and peripheral circuits.