PG-F312X (serv.man5). Troubleshooting Table - Sharp Projector Service Manual (repair manual). Page 7

XR-32S/XR-32X/PG-F212X/PG-F312X

5 – 7

                                          
Send component signal or RGB signal of 1080i (or 720P) from 
COMPUTER/COMPONENT Terminal or DVI-I Terminal.
Select COMPUTER or DVI-Analog using keys on the main unit 
or the remote control.

YES

Is image displayed normally?

YES

End

                                          

NO

Are picture signals sent to TL3201, TL3229, TL3230, TL3231, 
TL3232,  and TL3233?

NO

Check IC3001 and the peripheral circuits.

YES

Is 3.3V applied to TL1792?

NO

Check IC1792 and peripheral circuits.

YES

Is 3.3V applied to TL3802?

NO

Check IC3802 and peripheral circuits.

YES

Check IC3201 and peripheral circuits.

                                            
Send the DVI digital signal to the DVI-I Terminal.
Select “DVI-D Computer” using the keys on the main unit or the 
remote controller.

                                            
Does an image appear properly?

YES

End

                                            

NO

Is the DVI signal supplied to R3231, R3232, R3233, R3234, 
R3235, R3236, R3237 and R3238?

NO

Check DVI-I Terminal, L2801, L2802, L2803, L2804, D2803, 
D2804 and peripheral circuits.

YES

Is 3.3V applied to TL1792?

NO

Check IC1792 and peripheral circuits.

YES

Is 3.3V applied to TL3802?

NO

Check IC3802 and peripheral circuits.

YES

Check IC3201 and peripheral circuits.