LL-T1610W (serv.man6). Chapter 4 Troublehsooting - Sharp Monitor Service Manual (repair manual). Page 2

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Nothing is displayed on the PC screen (analog
RGB)
Nothing is displayed on the PC screen (digital DVI).
USB is inoperative.
HSYNC and VSYNC are 
inputted (LVC126, IC15)?
Go to procedure 
6
.
No
Yes
GHS and GVS are outputted 
(LVC126, IC15)?
Check the main PWB IC15 
and its peripheral circuits.
No
Yes
PW164 control signals 
(TP102, TP106, TP109) are 
outputted?
PW164 (main PWB IC9) is 
defective.
No
Yes
5 V (main PWB FB203) is 
outputted?
Check IC13 and IP3 and their
peripheral circuits. 
No
Yes
PVDD and AVDD (main PWB 
FB4, FB3) are outputted?
Check UPC2933 (IC17, IC10) 
and their peripheral circuits.
No
Yes
ADC9884 (main PWB IC11) 
outputted is generated 
(55 -112, 116)
ADC9884 (main PWB IC11) 
is defective.
No
Yes
PW164 (main PWB IC11) is 
defective.
PC is Sync ON Green?
Check main PWB Q502 and 
Q503 and their peripheral 
circuits.
Yes
No
Check RGB cable and main 
PWB CN6.
6
SiI151A outputs GHS and 
VSYNC? 
(main PWB R26, R25)
Go to procedure 
7
.
No
Yes
GFBK and GVS are outputted? 
(main PWB R534, R535)
Check the main PWB IC12 
and IC14 and their peripheral 
circuits.
No
Yes
PW164 control signals 
(TP102, TP106, and TP109) 
are outputted?
PW164 (main PWB IC9) is 
defective.
No
Yes
5 V (main PWB FB203) is 
outputted? 
Check IC13, IP3 and their 
peripheral circuits. 
No
Yes
TV 3.3 (main PWB FB5) is 
outputted? 
Check UPC2933 (IC21) and 
its peripheral circuits.
No
Yes
SiI151A (main PWB IC18) 
output is generated? (10 - 77)
SiI151A (main PWB IC18) is 
defective.
No
Yes
PW164 (main PWB IC11) is 
defective.
PC is set for digital outputted 
mode?
No
Yes
Set PC to digital outputted 
mode.
7
Check digital cable and main 
PWB CN5.
3.3 V output is generated? 
(USB PWB IC13 pin)
Check regulator 
(USB PWB IC1) 
and its peripheral circuits.
No
Yes
Clock is generated 
(4 MHz: USB PWB IC3, pin 25)
Check clock generator 
(USB PWB X1) 
and its peripheral circuits.
No
Yes
RESET 
(USB PWB IC3, pin 6) is High?
Check USB PWB R3, C203, 
and D7.
No
Yes
Data input 
(USB PWB IC3, pins 7 and 8)?
Check the path from USB 
PWB CN1 to IC3.
No
Yes
Data output 
(USB PWB IC3, pins 9, 10, 12, 
and 13)?
Check the path from USB 
PWB IC3 to CN2.
No
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