Sharp LC-32D44E Service Manual page 50

LC32D44E/S/RU-BK/GY (1st Eddition)
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 pin (16),(17) of TUNER(TU201)
to pin(10),(11) of IC207(COFDM)?
Similarly, is communication control carried out between
pin (8),(9) of TU201, and pin (20),(21)of IC207?
Does X201(27MHz) oscillate?
Is the MPEG data (FESCL, FESDA, FEVALID, FES-
TROUT) output from IC207 to IC4001?
Are the video signals (DTV_R/G/B, DTV_CVBS) output
from PIN(15,16,17), PIN(18) of IC4001?
Are the video signals (DTV_R/G/B, DTV_CVBS) input
to PIN(181,180,179), PIN(184) of IC3001
(MAIN_MICON)?
Refer to "The picture doesn't appear in all modes."
No picture on the display (3)
Does not the picture come out when DTV is received?
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Each power supply circuit is checked.
Check the tuner, IC207 and their peripheral circuits.
Replace as required.
Check X201 and its peripheral circuits.
Check if the line between IC207 and IC4001 and the control signals
FERROR_LINE and FERESET_LEINE are normal. (IC4402, etc.)
Check if IC4001, IC4201(SDRAM), IC4251(FLASH_MEMORY) and
IC4202(B+2.5V_REG) are normal.
Check the line between IC4001 and IC3001.
(IC1401, IC1001, Q1031, etc.)
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