2KR/2KS-1
1-6-1
1-6 Requirements on PWB Replacement
1-6-1 Upgrading the firmware
Follow the procedure below to upgrade the firmware of main PWB, engine PWB, scanner and panel.
Procedure
1. Perform maintenance item U000 (mainte-
nance report output) and check U019 ROM
version.
2. Press the power key on the operation panel
to off. Make sure that the main power indica-
tor and the memory indicator are off before
turning off the main power switch. And then
unplug the power cable from the wall outlet.
3. Insert USB memory in a notch hole of the
machine.
4. Insert the power plug and turn the main
power switch on. Upgrading firmware starts.
Caution:
Never turn the main power switch off during
upgrading.
Figure 1-6-1
5. [100% Completed] is displayed on the touch
panel when upgrading is complete.
6. Turn the main power switch off and unplug
the power cable from the wall outlet.
7. Remove USB memory from the machine.
8. Insert the power plug and turn the main
power switch on.
9. Perform maintenance item U000 (mainte-
nance report output) and check that U019
ROM version has been upgraded.
1-6-2 Adjustment-free variable resistors (VR)
The variable resistors listed below are set at the factory prior to shipping and cannot be adjusted in the field.
High voltage PWB: VR2, VR42, VR201, VR204
B1
A2
DP
OPT1
USB memory
Summary of Contents for TASKalfa 420i
Page 1: ...SERVICE MANUAL Published in May 2010 842KS113 2KSSM063 Rev 3 TASKalfa 420i TASKalfa 520i ...
Page 4: ...This page is intentionally left blank ...
Page 10: ...This page is intentionally left blank ...
Page 14: ...2KR 2KS This page is intentionally left blank ...
Page 224: ...2KR 2KS 1 4 66 This page is intentionally left blank ...
Page 328: ...2KR 2KS 2 3 30 This page is intentionally left blank ...
Page 371: ...INSTALLATION GUIDE FOR PAPER FEEDER ...
Page 381: ...INSTALLATION GUIDE FOR 3000 SHEETS PAPER FEEDER ...
Page 436: ...INSTALLATION GUIDE FOR CENTER FOLDING UNIT ...
Page 450: ...INSTALLATION GUIDE FOR MAILBOX ...
Page 458: ...INSTALLATION GUIDE FOR HOLE PUNCH UNIT ...
Page 470: ...INSTALLATION GUIDE FOR BUILT IN FINISHER ...
Page 483: ...INSTALLATION GUIDE FOR JOB SEPARATOR ...
Page 491: ...INSTALLATION GUIDE FOR FAX System ...
Page 507: ......
Page 508: ......