Sharp LC-32D42U, Service Manual

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LC-32D42U/LC-37D42U
6 – 9
No video output from PC input (INPUT 6)
DIGITAL mode Analog mode
IS IC1505 (E2PROM) accessed with I2C when connecting PC and is
DDC_I2C_CLOCK/DATA data read out? 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, 10, 8, 2, 3 of IC3304 (A/DC)?
YES
NO
YES
NO
Check IC1505 and periph-
eral circuits. Are cable con-
nected securely? Check peripheral circuits of IC3304.
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) to pins B23, A23, D22, C22, E23,
A25, D23, B24, F22, A24, C23, E22, D17, F18, E18, F17, E17, C17, B17, A17, C16, D16, F16, E16 of IC8101?
YES
NO
Check connection of IC3304 and IC8101.
Are digital video (LVDS) signals sent from pins
37-42 and 45-48 of IC2602? NO Check IC2602 and peripheral circuits.
Are digital video (COMOS) signal sent from
IC8101 (DVODATA 0 > 23, DVOCLKO,
DVODE, DVOHSYNC, DVOVSYNC)?
NO
Check IC8101 and peripheral circuits.
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.
Are IF_OUT_P/N signal send from pin
(20), (19) of TU1101 respectively?
YES Are signal fed to pins U25, U26 of
IC8101? YES Check IC8101 and its peripheral cir-
cuits.
NO NO
Check the TU1101. Check between TU1101 and
IC8101 (C1104, C1141, etc).