LL-T2010W (serv.man20). Complete - Sharp Monitor Service Manual (repair manual). Page 14

LL-T2010W

TROUBLE SHOOTING

4 – 1

Check whether the following cables are connected correctly.
In addition, check whether the PCs video mode is properly set to the signal timing witch meets this machine.

*

Attached cables

•  Dedicated AC adapter

•  Dedicated signal cable (RGB cable, DVI cable)

(No)

(Yes)

1

When the power button is pressed, does 
LED light up?

Execute

(No)

(Yes)

1

1

When the RGB cable is disconnected, 
does LED change from Green to Orange?

Execute

(No)

(Yes)

2

When the RGB cable is connected, does 
LED keep Green? (No change from 
Green to Orange)

Execute

(No)

(Yes)

3

Does B/L light up?

Execute

(No)

(Yes)

4

Does the display work normally in each 
video mode?

No abnormality

Execute

(No)

(Yes)

2

Is 5V (main PWB D22 cathode) supplied? 

Execute

(No)

(Yes)

2

Does Q9 (1PIN)-R185 output? (3V)

Execute

(No)

(Yes)

Does FB7-CN5 (2PIN) output? (1.9V)

Check connection of the SW cable and 
the SW PWB. 

Check 09 and its peripheral circuits. 

2

(No)

(Yes)

Is the input signal port connected with the 
analog signal cable?

Press INPUT key to switch to the 
proper input signal port. 

Check the DC+5V power line and the 
IC19 peripheral circuits. 

Check the DC+12V power line, F1, F2, 
D1, D2 of the DC jack PWB, and their 
peripheral circuits. 

Check the exclusive-use AC adapter. 

(No)

(Yes)

Is DC+12V supplied from the exclusive-
use AC adapter?

(No)

Is CN8-3PIN at DC+12V?

(Yes)

(No)

Is D21 cathode at DC+5V?