Konica Minolta bizhub PRO 920 Service Manual page 502

13. MALFUNCTION CODE
Classification Code
Motor SC24-01
abnor-
mality
SC24-02
Connec- SC24-03
tion
abnor-
mality
High SC28-01
voltage
power
source
abnor-
mality
SC28-02
470
Causes
The temperature of the drum
temperature sensor (TH5)
detected a specified period of
time after the main power switch
(SW1) is turned ON is -3°C or
lower, and also, the drum temper-
ature after a specified period of
time is -3°C or lower.
When the main power switch
(SW1) turns ON with the fusing
temperature below 50°C, the
detected temperature of the
drum temperature sensor (TH5) is
more than 52°C, and when the
detected temperature is above
52°C after a specified period of
time.
The erase lamp (EL) is uncon-
nected.
A charge leak is detected. After a
charge error detection signal is
detected while in the charge ON,
up to 5 charge ON/OFF opera-
tions occur in succession.
A transfer leak is detected. After a
transfer error detection signal is
detected while in the transfer ON,
up to 5 transfer ON/OFF opera-
tions occur in succession.
Field Service Ver2.0 Aug.2005
Resulting Estimated abnormal parts
operation
The main body Printer control board
stops immedi- (PRCB)
ately to turn OFF Drum temperature sensor
the main relay (TH5)
(RL1).
Erase lamp (EL)
Loose connection
If there is a High voltage unit /1 (HV1)
sheet of paper Charging/power feeding
being printed, contact
the main body
completes the
paper exit
High voltage unit /2 (HV2)
before stopping
Transfer/separation charger
operations.
Power feeding contact
Immediately to
turn OFF the
main relay (RL1).