LC-52XD1E (serv.man5). Trouble Shooting Table - Sharp TV Service Manual (repair manual). Page 7

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LC-46/52XD1E-RU
6 – 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).

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