Sharp LC-37XD1E

LC-37XD1E/RU
4 – 7
DTV troubleshooting 1
The unit does not enter
the DTV mode. Or, the
DTV menu does not
appear.
YES Go to "The unit does not
enter the DTV mode. Or,
the DTV menu does not
appear."
The unit does not enter the DTV mode. Or, the DTV menu does
not appear.
NO
No video output during
DTV reception.
YES Go to "No video output
during DTV reception."
Digital UNIT:
Is a voltage supplied
from IC4701(3.3V-
REG)/IC4704(1.8V-
REG)?
NO Check peripheral cir-
cuits of IC4701/IC4704
and pin(7) of IC4701.
NO YES
No audio output during
DTV reception.
YES Go to "No audio output
during DTV reception."
Do X4001/X4002 oscil-
late?
NO Check peripheral cir-
cuits of X4001/X4002.
YES
D-TUNER UNIT:
Is a voltage of 1.8/3.3V
supplied from
IC205(REG) and
IC206(REG)?
NO Check peripheral cir-
cuits of IC205/IC206.
YES
. Is a voltage applied to
pin(20) (I2CSEL) of
P202?
(High=3.3V)
NO MAIN UNIT:
Check around the pin
(85) of IC1710(FPGA).
YES
. Is FESDA/FESCL sig-
nal sent to pins (21)
and (22) of P202 and
pins (21) and (20) of
IC202 (COFDM).
NO Check peripheral cir-
cuits of IC202(COFDM)/
IC4001(D-Processor).
YES
. Does X-TAL X202 of
IC202 oscillate?
NO Check peripheral cir-
cuits of X202.
YES
. Check
IC202(COFDM)/
IC4001(D-Processor).