Kyocera TASKalfa 7002i Service Manual page 1341

Step Check description
3 Checking the main PWB
F022: System memory error (RAM reading/writing error or ASIC memory error)
The error appears during the reading/writing check of the RAM for the DP relay PWB ASIC when the main unit
starts up.
Step Check description
1 Resetting the main power
2 Executing U021
3 Checking the DP relay
PWB
Assumed cause
The connector or the FFC
is not properly connected.
The wire, the FFC or the
PWB is faulty.
Assumed cause
The main PWB does not
properly start up.
The backup RAM data is
faulty.
The DP relay PWB is not
properly connected or
attached.
7-481
Measures
Clean the connectors on the
main PWB and the FFC ter-
minal. Then, reconnect the
wire connector and the FFC.
At that time, if the wire is
pinched by other parts or it is
damaged, repair or replace
the wire. If the FFC terminal
section is deformed or FFC is
broken, replace the FFC. If
the issue is not resolved,
replace the main PWB.
Measures
Remove the original and
check the sensor. Next, turn
off the power switch and main
switch. Then, turn on the
main switch and power
switch when passing 5 sec-
onds.
Execute U021 to initialize the
backup RAM data.
Reattach the DP relay PWB
and secure it with the screws.
If not repaired, replace the
DP relay PWB.
2WA/2NJ/2RK
Reference
Detaching
and Reat-
taching the
main PWB
Reference
Executing
U021
Detaching
and Reat-
taching the
DP relay
PWB
(including
in the pro-
cedures of
detaching
and reat-
taching the
main
PWB)