Sharp LC-26D43U Service Manual page 36

LC-26D43U
TROUBLESHOOTING TABLE
No video output from PC input (INPUT6)
DIGITAL mode
2
IS IC1505(E PROM) accessed 12C when connecting PC
and is DDC_12C_CLOCK/DATA data read out?
Yes
Check the setting of PC.
Are signals from pins 83-76,62-55,50-43,71-68.(DATA0-23,VSYNC,HSYNC,DE,CLK) of IC3304 (ADC) toB23,A23,D22,C22,
E23,A25,D23,B24,F22,A24,C23,E22,D17,F18,E18,F17,E17,C17,B17,A17,C16,D16,F16,E16 ,F23,G22,C25,C24 of IC1801?
Yes
Are digital video (LVDS) signals sent from pins 37-42 and
45-48 of IC2602?
Are digital video (COMOS) signal sent from IC8101
(DVODATA0>23,DVOCLKO,DVODE, DVOHSYHC,
DVOVSYNC)?
Yes
Check LCD_CONTROL PWB.
When using an old HDMI transmission device,some video formats cannot be selected or no sound is heard. Since this model
conforms to the latest HDMI standard, the HDMI transmission device does not recognize the data of the latest version
correctly.It is necessary to upgrade its firmware. Download the latest firmware from the web site of each manufacturer,or
contact the customer service center of each manufacturer.
[FRONT-END SECTION]
Digital broadcasting cannot be received.
Yes
Are IF_OUT_P/N signal send from
pin (20) (19) of TU1101 respectively?
No
Check the TU1101.
Yes
No
Check IC1505 and periph-
eral circuits.Are cable con-
nected securely?
No
No
Yes
Are signal fed to pins U25,U26 of
IC8101?
No
Check between TU1101 and
IC8101(C1104,C1141,etc.).
(Continued)
Analog mode
Are signal fed from pins 1,2,3(Analog-R/G/B),and 13,14(H
Sync/V Sync) of input terminal (SC1503) to pins 11,9,6,2,3
of IC3304 (A/DC)?
Yes No
Check peripheral circuits of IC3304
No
Check connection of IC3304 and IC8101.
Check IC2602 and peripheral circuits.
Check IC8101 and peripheral circuits.
Yes
Check IC8101 and its peripheral cir-
cuits.
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