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Reissued: 7-Aug-03
Model:
Model U-P1
BCU
Eliminated unnecessary occurrences of SC420 (Fusing bias discharge
error):
SC420 will not be triggered when a leak occurs as a result of a small
hole on the fusing belt surface, since from field experience it has been
confirmed that belt lifetime is actually longer when the SC is not
triggered in these conditions. If the leak should occur, instead of the SC
the machine turns SP2-510 OFF (fusing bias SW), and the fusing bias is
not applied until the fusing counter is cleared when the user replaces
the unit or the SP is set back to ON.
1. Eliminated unnecessary occurrences of SC410 (2
leakage):
SC410 tends to frequently occur when using paper with a high moisture
content under high-temperature, high-humidity conditions when the
resistance on the paper transfer roller is low. The roller current was
previously lowered for mono-color mode (45% that of full color), which
lowered the resistance and caused frequent occurrences. This version
uses the color mode current for mono-color until job end to eliminate
unecessary occurrences under the conditions described above.
2. SP modes newly added (listed below).
These SPs have been added to ensure proper (higher) transfer belt
cleaning by applying the following bias voltages at job end (OPC
lubrication time):
SP2-400-008: Cleaning Bias LL1: OPC lubrication time
SP2-401-008: Cleaning Bias LL2: OPC lubrication time
SP2-402-008: Cleaning Bias NN1: OPC lubrication time
SP2-403-008: Cleaning Bias NN2: OPC lubrication time
SP2-404-008: Cleaning Bias HH: OPC lubrication time
[0 to 2000/ 1400 / 10 Volt/step]
3. Minimum value changed for SP2-941-01, -02 (OPC lubrication time).
Minimum increased from 0 to 6:
SP2-941-01: Job End: [6 ~ 30 / 20 / 1 s/step]
SP2-941-02: OPC Lubrication Interval: [6 ~ 60 / 10 / 1 s/step]
NOTE : Along with this BCU version, be sure to update the main unit
controller firmware to v2.28 or later.
T
echnical
Symptom Corrected
B
ulletin
Date:
3-Feb-03
nd
transfer electric
PAGE: 2/2
No.:
RG071004c
Version
V1.45
V1.44A
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