PG-A20X (serv.man12). Troubleshooting tables - Sharp Projector Service Manual (repair manual). Page 7

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37
PG-A20X
NO
YES
NO
NO
NO
YES
NO
NO
YES
NO
NO
NO
Checking the S-video 
Is the specified voltage EA 
connectors?
Check power circuit and its 
parts.
Is the lamp on ?
Go to "Lamp  light-up".
YES
Is the video signal inputted 
into the pins(43) and (44) 
of IC3105?
Check the video terminal 
and its peripheral circuits.
YES
Go to "Checking IC3102"
Checking the video 
Is the specified voltage EA 
connectors?
Check power circuit and its  
peripheral parts.
Is the lamp on ?
Go to "Lamp light-up".
YES
Is the video signal inputted 
into the pin(7) of IC3506?
Check the video terminal 
and its peripheral circuits.
YES
Check IC3105 and its 
peripheral circuits.
Check IC1103 and its 
peripheral circuits.
Is the signal inputted into 
the pins(39) and (41) of 
IC3105?
Check Q3501, Q3502 and 
their peripheral circuits.
YES
Is the video signal 
outputted from the pins(25)
and (27) of IC3506?
Check IC3506 and its 
peripheral circuits.
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