Ricoh FT7770 Service Manual page 569

I
Is the output voltage between
CN301-A15 (550W) and TP215 on
Y
Is the input voltage between CN302-B14 (1,100W) or
CN302-A15 (550W) and TP215 3V ?
Replace the dc drive board.
Replace the SSR fusing lamp board.
Replace the fusing lamp(s)
Service Call 7 -
o The hot roller temperature exceeds 220°C for more than 3
seconds.
o Turn off the main switch.
o Disconnect the fusing thermistor connector.
Is the fusing thermistor a short circuit (CN353-1, CN353-2)?
Y N
I
Is the voltage at connectors CN301-B14 (1,100W) or
CN301-A15 (550W) zero volts continuously?
Y N
Replace the SSR(S).
N
I
Check and correct the harness and connector.
N
I
Is the output voltage between
or CN201-B15 (550W) and TP215
Replace the main board.
Check and correct the harness
Fusing Overheat
CN301-B14 (1,100W) or
the main board 0 volt?
13-45
30 April,'89
CN201-A15 (1,100W)
3 volts?
and connector.