Cis Control Section - Panasonic UF-5500 Service Manual

11.2.15. CIS Control Section

Are there any
stain and/or dust on the glass
surface and/or inside the
white sheet?
OK
Insert document and copy.
Is LED lighted?
NO
Is the voltage of
CN510 pin9 about 7V?
YES
Are the solders at
R541,R542,R543,Q514(GREEN),
R544,R546,R549,Q516(RED),
R550,R554,R556,Q517(BLUE)
OK?
YES
Are the signals output to
the Base of Q514 (Q514-R541;GREEN)
the Base of Q516 (Q516-R544;RED)
the Base of Q517 (Q517-R550;BLUE)?
YES
Is the voltage of R543-GND,
R549-GND, R556-GND
0.7 ~0.9V?
YES
Is the lead (9pin~12pin)
connected to pin 3 of CN510
properly? or are the solders
at pin 3 of CN510, OK?
YES
Replace the CIS.
NG
Clean the stain and/or dust.
YES
NO
Is the solder at R548 OK?
YES
Check that CN504 pin2 and
the power supply unit is 7V.
NO
NO
Replace the IC300.
NO
Replace the Q514, Q516 and Q517.
NO
Replace the lead or
solder the pin 3 of CN510 again.
177
A
NO
Solder them again.
UF-5500 / 4500