LL-T1610W (serv.man11). LLT1610W Complete - Sharp Monitor Service Manual (repair manual). Page 19

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CHAPTER 4. TROUBLESHOOTING
Nothing is displayed on screen
Yes
No
Go to procedure 
2
.
Yes
No
Go to procedure 
3
.
Yes
No
Go to procedure 
4
.
Yes
No
Go to procedure 
5
.
No
Yes
Check M62334FP 
(main PWB IC19) 
and its peripheral circuits.
No
Yes
RESET (main PWB IC3) 
operates with power ON?
Check MB3111 
(main PWB IC3) 
and its peripheral circuits.
No
Yes
MCLK (main PWB R6) 
oscillates?
Check ICS512 
(main PWB IC6) 
and its peripheral circuits.
No
Yes
Check flash memory 
(main PWB IC27) 
and its peripheral circuits.
43.2MHz
Yes 
DCLK (main PWB R7) 
oscillates (108 MHz)?
Check ICS511 
(main PWB IC1) 
and its peripheral circuits.
No
129.6MHz 
Go to procedure 
3
.
No
Yes
LCD is defective.
LED does not come on.
Go to procedure 
1
.
LED (orange) stays in orange.
OSD does not appear with 
MENU, INPUT.
B/L does not come on.
Press "All reset".
3.3 V (main PWB FB202) is 
outputted?          
LEDY or LEDR signal is 
outputted?
LCD is defective.
MCLK frequencies are 
43.2MHz/129.6MHz?
OSD is displayed? 
1
2
VON (main PWB CN4,7) are 
outputted (High)?
Check M62334FP 
(main PWB IC19)   
and its peripheral circuits.
No
Yes
Inverter PWB is normal?
Inverter PWB is defective.
No
Yes
12 V (main PWB FB201) is 
outputted?
Check IC2, IP1 and peripheral 
circuits.
No
Yes
Control signal are outputted to 
LCD connector (CN9)?
Check the circuit between 
PW164 (IC9) and connector 
(CN9).
Yes
Adapter is defective.
No
Yes
ICP broken (main PWB IP2)?
Replace ICP.
Yes
No
Check IC7 and its peripheral 
circuits.
Go to procedure
 4
.
LCD is defective.
Adapter outputted normal?
No
3
4
5

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