Read Sharp LC-37RD2E (serv.man5) Service Manual online
LC-32RD2E/RU, LC-37RD2E/RU
4 – 7
The unit does not enter the DTV mode. Or, the DTV menu does not appear.
Digital UNIT:
Is a voltage supplied from IC4701 (3.3V-REG)/IC4704 (1.8V-
REG)/IC4702 (5V-REG)?
Is a voltage supplied from IC4701 (3.3V-REG)/IC4704 (1.8V-
REG)/IC4702 (5V-REG)?
NO
Check peripheral circuits of IC4701/IC4704 of IC4702.
(IC4701, IC4704, IC4702, Q4703 and POW-ON_LINE, etc.)
(IC4701, IC4704, IC4702, Q4703 and POW-ON_LINE, etc.)
YES
Do X4001(32.768kHz)/ X4002(27MHz) oscillate?
NO
Check peripheral circuits of X4001/X4002.
D-TUNER UNIT:
YES
Does each REG [IC206 (REG), IC208 (REG) and IC205 (REG)]
driving IC202 work normally?
driving IC202 work normally?
NO
Check peripheral circuits of IC206/IC208/IC205.
YES
Is a voltage applied to pin (20) (I2CSEL) of P202?
(High=3.3V)
(High=3.3V)
NO
MAIN UNIT:
Check around the pin (42) of IC2301.
Check around the pin (42) of IC2301.
YES
Is FESCL/FESDA signal sent to pins (22) and (21) of P202 and
pins (1) and (13) of IC204 (SW).
pins (1) and (13) of IC204 (SW).
NO
Check peripheral circuits of IC202 (COFDM)/ IC4001 (D-Proces-
sor).
sor).
YES
Does X202 (27MHz) oscillate?
NO
Check peripheral circuits of X202.
YES
Check IC202 (COFDM)/IC4001 (D-Processor).
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