SERVICE MANUAL
74
10SEP02 – 9B8949
Checking the DEVELOPER PUMPS
[1]
Enter mode 4. See
Caution
Operating the PUMPS excessively without solution
might cause damage to the PUMPS.
[2]
Press and hold the “RUN” BUTTON on the
CONTROL BOARD.
Note
Holding the “RUN” BUTTON:
• Actuates the DEVELOPER RECIRCULATION
PUMP and illuminates LED 2
• Actuates the DEVELOPER REPLENISHMENT
PUMP and illuminates LED 4
[3]
Do LED 2 and LED 4 illuminate?
[4]
If LED 2 and LED 4 illuminate and the PUMPS do not operate, check FUSE F1 on the DRIVE BOARD.
[5]
Does FUSE F1 have continuity?
[6]
Check the output signal for the DEVELOPER PUMP CIRCUITS on the DRIVE BOARD:
[7]
Are the voltages correct?
H164_0034AC
FIX.
DEV.
RUN
Rep.
Dev. Temperature
Low
Ready
High
Service
Yes
No
a. Check:
• I/O BOARD
• I/O BOARD/DRIVE BOARD CABLE
b. If necessary, install a new part.
Yes
No
a. Install a new FUSE.
.
Signal
Position on DRIVE BOARD
Voltage
DEVELOPER RECIRCULATION PUMP
PIN 15 to PIN 3 on CN2
approximately 100 V AC
DEVELOPER REPLENISHMENT PUMP
PIN 19 to PIN 7 on CN2
approximately 100 V AC
Yes
No
a. Check the PUMP.
b. If necessary, install a new PUMP.
a. Check:
• SOLID STATE RELAY SSR2
• SOLID STATE RELAY SSR4
b. If necessary, install a new SOLID STATE
RELAY.
