LL-T2010W (serv.man15). Troubleshooting - Sharp Monitor Service Manual (repair manual). Page 6

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LL-T2010W
TROUBLE SHOOTING
4 – 6
(No)
Is the unit connected to the analog input 
CN1?
Connect the firmware upgrade jig to the 
analog input CN1. 
(Yes)
(No)
Is a jig connected to CN3?
Connect the jig to CN3. 
(Yes)
(No)
Are CN3-1PIN, 2PIN, and 3PIN at the 
same potential?
Check CN3 and the jig connected to 
CN3. 
(Yes)
(No)
Are CN3-1PIN, 2PIN, and 3PIN at 
DC+12V?
Check R173 and the 12V line from the 
DCJACK PWB.
(Yes)
(No)
Is the output of Q18 at L (DC0V)?
Check the Q18 peripheral circuits. 
(Yes)
(No)
Is WRPG_SEL at DC+5V?
Check the R179~R181 peripheral 
circuits. 
(Yes)
(No)
Are IC6-1PIN and 13PIN changed 
properly?
(Yes)
Check IC15-31PIN, 32PIN, 33PIN, 35PIN, 
and 44PIN. (IF there is no abnormality, 
IC15 is defective.)
Check the IC6 peripheral circuits. 
Firmware upgrade cannot be made. 

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LL-T2010W (serv.man15) Service Manuals

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