PG-F312X (serv.man5). Troubleshooting Table - Sharp Projector Service Manual (repair manual). Page 3

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

5 – 3

                                   

Check P2501 for breakage and solder crack and peripheral resis-
tance for solder crack.

                                   

Check SC9101 on the DMD PWB for breakage and solder crack.

                                   

Is there any vertical stripe (block noise) on the Screen?

YES

The main PWB and DMD PWB are in poor contact.
Check the contact surface for dirt and smear.
Check the DMD connector for breakage.
Reassemble the DMD, optical mechanism, and DMD PWB.

                                   

NO

Is the screen all black?

NO 

                                    

YES

Is 12.5 V applied to IC3803 pin (2) and 1.8 V to 
TL3809?

NO

Check IC3803, IC2205, and their peripheral circuits.

                                    

YES

Is 400 MHz on IC2201 pin (26) and pin (27)?

NO

Check IC2201 and peripheral circuits.

                                    

YES

Is 320 MHz on IC2204 pin (13) and pin (14)?

NO

Check IC2204 and peripheral circuits.

                                    

YES

Is approx. 8 V applied to TL9303 on the DMD PWB?

        NO

YES

Is approx. 26 V applied to TL9301 on the DMD PWB?

NO

Check IC9301 and peripheral circuits.

YES

        NO

Is approx. -26 V applied to TL9302 on the DMD PWB?

YES

The main PWB and DMD PWB are in poor contact.
Check the contact surface for dirt and smear.
Check the DMD connector for breakage.
Reassemble the DMD, optical mechanism, and DMD PWB.