Diagnostics
9B8949 – 10SEP02
71
Checking the ENTRANCE SENSOR BOARD
[1]
Enter mode 1. See
[2]
Observe the “Ready” INDICATOR during
and
.
[3]
Block one of the SENSORS on the ENTRANCE
SENSOR BOARD.
[4]
Block the other SENSOR on the ENTRANCE
SENSOR BOARD.
[5]
Does the “Ready” INDICATOR illuminate when
you block the SENSORS in both
and
Checking the DEVELOPER HEATER
[1]
Enter mode 2. See
[2]
Observe LED 9 on the DRIVE BOARD.
[3]
Press the “RUN” BUTTON on the CONTROL
BOARD.
Note
The DEVELOPER HEATER and LED 9 on the DRIVE
BOARD will actuate for 0.2 seconds.
[4]
Does LED 9 illuminate for 0.2 seconds?
[5]
If LED 9 illuminates and the DEVELOPER HEATER does not actuate, check the resistance of DEVELOPER
HEATER H51:
[6]
Is the resistance correct?
[7]
Check that the resistance of DEVELOPER HEATER OVERTEMPERATURE THERMOSTAT SW52 is
approximately 0 Ohms.
H164_0034AC
FIX.
DEV.
RUN
Rep.
Dev. Temperature
Low
Ready
High
Service
Yes
No
The ENTRANCE
SENSOR BOARD is
operating correctly.
Install a new
ENTRANCE SENSOR
BOARD.
H164_0034AC
FIX.
DEV.
RUN
Rep.
Dev. Temperature
Low
Ready
High
Service
Yes
No
Continue with
a. Install a new I/O
BOARD.
PROCESSOR
H51 Resistance, Ohms
1000A
30 - 40
1000J
25 - 35
1000
150 - 170
Yes
No
Continue with
. Install a new DEVELOPER HEATER.