PG-M25XE (serv.man11). Troubleshooting table - Sharp Projector Service Manual (repair manual). Page 5

No

Yes

Does POWER LED flicker in red 
(for 2 seconds)?

No

Is there B+3.3V output at pins (12) 
and (13) of CN3701?

Is there 6V output at pins (5) and 
(6) of P2003?

Yes

Go to "Checking of PC I/F Unit", and check 
the flexible connector.
Communication error of sub-microprocessor 
(KEY) and SH microprocessor (PC I/F unit) 
Pins (20) and (21) of P2001.

Yes

Go to "Checking of Power Unit"

Check Q2001 thru Q2004 of 
IC2001.

No

No

Yes

Is Bu+6.2V signal outputted?"

Go to "Checking of 
Power Unit"

Yes

No

Is Bu+3.3V signal outputted?

Check IC2010 and its 
periphery.

Check IC2002 and its 
periphery.

Yes

No

Is 3.3V signal output at pin 
(19) of IC2001?

Check IC2001 and its 
periphery and go to 
"Checking of Remote Control 
Communication".

Checking of Sub-microprocessor
and Its Periphery