Trouble code
Description
Main
code
Sub
code
U0
U9
E7
F9
95
96
9L
Content U0–
**
: communication trouble between
MAIN and SUB (SUB detection)
U9–
**
: communication trouble between
MAIN and OPE (OPE detection)
E7–
**
: communication trouble between
MAIN and ICU (ICU detection)
F9–
**
: communication trouble between
MAIN and PRT (PRT detection)
Detail
Framing error/parity error occurred on
TXD_XXX signal line. (XXX is a slave unit
signal name.)
Cause
Improper connection of slave unit PWB
connector
Defective harness between slave unit PWB
and main PWB
Noise occurred on TXD_XXX signal line.
Check
and
remedy
Check the connection of connector and
harness between slave unit PWB and main
PWB.
Check the copier for grounding.
Check for noise around the copier.
U0
U9
E7
F9
97
98
99
9U
9F
Content U0–
**
: communication trouble between
MAIN and SUB (SUB detection)
U9–
**
: communication trouble between
MAIN and OPE (OPE detection)
E7–
**
: communication trouble between
MAIN and ICU (ICU detection)
F9–
**
: communication trouble between
MAIN and PRT (PRT detection)
Detail
A protocol error occurred between main
and slave units.
(XX-97/99 means that data from main unit
could not be processed within specified
time)
(XX-98 means that main unit does not
respond within specified time.)
(XX-9U means that DSR_XXX signal line
is kept OFF more than specified time after
establishing communication.)
Cause
Software bug
Check
and
remedy
Check reproducibility.
When OPE judges as a main unit trouble, the message
"communication trouble between OPE and main unit (
*****
)"
appears on LCD.
F9
01
Content PRT DRAM trouble
Detail
DRAM trouble inside optional printer board
(checked when power is turned ON).
Cause
Not possible to access because DRAM
module is broken.
DRAM module improperly installed
Check
and
remedy
Check with SIM67-1.
Trouble code
Description
Main
code
Sub
code
U2
00
Content EEPROM read/write error
Detail
EEPRO version error. Error in writing into
EEPROM.
Cause
EEPROM defective
Uninitialized EEPROM is installed
Defective EEPROM access circuit on PCU
PWB
Check
and
remedy
Check EEPROM for proper set-up
To prevent the erasion of counter data and
adjustment values, write down the counter
data and adjustment values by simulation.
(If there is a printer option, execute
SIM23-1 and note counter data/adjustment
values.)
Clear U2 trouble with SIM16.
Replace PCU PWB.
U2
11
Content Counter checksum error
Detail
Checksum error in counter data area
Cause
EEPROM defective
Control circuit hung up due to noise
Defective EEPROM access circuit on PCU
PWB
Check
and
remedy
Check EEPROM for proper set-up
To prevent the erasion of counter data and
adjustment values, write down the counter
data and adjustment values by simulation.
(If there is a printer option, execute
SIM23-1 and note counter data/adjustment
values.)
Clear U2 trouble with SIM16.
Replace PCU PWB.
U2
12
Content Adjustment value checksum error
Detail
Checksum error in adjustment value data
area
Cause
EEPROM defective
Control circuit hung up due to noise.
Defective EEPROM access circuit on PCU
PWB
Check
and
remedy
Check EEPROM for proper set-up
To prevent the erasion of counter data and
adjustment values, write down the counter
data and adjustment values by simulation.
(If there is a printer option, execute
SIM23-1 and note counter data/adjustment
values.)
Clear U2 trouble with SIM16.
Replace PCU PWB.
9 – 99