Sharp lc-32rd8 Service Manual page 50

LC-32RD8E/S/RU-BK/GY (1st Edition)
Are the gradation signals (VH/VL_247, 191, 159, 63, 31, 0)
normally sent from IC7102 (GLAY_LEVEL_GENERATION) to
SC7101/SC7102?
Check the connectors SC7101/SC7102 and LCD panel.
Does not the picture come out when VHF/UHF is received?
Is the video signal(VIN1) output from pin (6) of
TUNER(TU201)?
Is the video signal(VIN1) sent to pins (191) of IC3001
(MAIN_MICON)?
Refer to "The picture doesn't appear in all modes."
Is the voltage of regulation for a TUNER circuit and the power
supply terminal of IC207(COFDM) supplied?
(Refer to the circuit diagram)
Is IF signal output from pins(16),(17) of TUNER(TU201) to
pins(10),(11) of IC207(COFDM)?
Similarly, is communication control carried out between pins
(8, 9) of TU201, and pins (7, 6) of IC4001
(SET_TOP_BOX_DECODER)?
Does X201(27MHz) oscillate?
YES
YES
No picture on the display (2)
YES
YES
No picture on the display (3)
Does not the picture come out when DTV is received?
YES
YES
YES
YES
NO Check IC7003 and that the communication between its peripheral
circuits and IC7102 is normal. (Each line of DAC_CLK/DATA/
LATCH)
NO
Whether the communication control is executed pin (8,9) of TU201
and between pins (20,21) of IC207 is checked.
NO
Check the line between TU201 and IC3001.
NO
Each power supply circuit is checked.
(IC204, IC205, etc.)
NO
Check the tuner, IC207 and their peripheral circuits.
Replace as required.
NO Check the line between TU201 and IC4001.
(IC203(BUS_SW.), etc.)
NO
Check X201 and its peripheral circuits.
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