Sharp LC-37XD1E Service Manual page 38

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