Eeprom Check Sum Error (Icu Detection); Fax Backup Sram Memory Check Sum Error Case; Production No. Data Discrepancy (Icu ⇔ Icu); Eeprom Read/Write Error (Scn) - Sharp AR-BC260 Service Manual

Main Sub EEPROM check sum error (ICU
Title
code code detection)
U2 11 Display Lamp/Message
Phenomenon Detail
Section
Case 1 Cause
Check &
Remedy
Case 2 Cause
Check &
Remedy
Main Sub FAX backup SRAM memory check
Title
code code sum error
U2 22 Display Lamp/Message
Phenomenon Detail
Section FAX
Case 1 Cause
Check &
Remedy
Case 2 Cause
Check &
Remedy
Main Sub
Title Production No. data discrepancy
code code
U2 30 Display Lamp/Message
Phenomenon Detail
Section
Case 1 Cause
Check &
Remedy
EEPROM (ICU) check sum
error
—
EEPROM trouble
1. Check that the EEPROM
is properly set.
2. Use SIM 16 to cancel the
error.
Control circuit freeze by
noises.
ICU PWB EEPROM access
circuit trouble.
1. To prevent against
deletion of the counter
data and the adjustment
data, record them with
the simulation. (When a
printer option is installed,
use SIM 22-1 to record
the counter data and the
adjustment data.)
2. Replace the ICU PWB.
3. Use SIM 16 to cancel the
error.
FAX backup SRAM
memory check sum error
SRAM trouble
Initialize the one-touch dial
and the FAX soft switch
registered in the SRAM.
Cancel the trouble with SIM
16.
Control circuit freeze by
noises.
Access circuit trouble.
Replace the FAX PWB. Use
SIM 16 to cancel the error.
The production No.
recorded in the PCU differs
from that recorded in the
ICU.
—
EEPROM is not exchanged
when replacing the PCU/
ICU PWB.
Check that the EEPROM is
properly installed. When
replacement, check that the
EEPROM before
replacement is inserted to
the board after
replacement.
AR-BC260 TROUBLESHOOTING 11 - 25
Main Sub
Title

EEPROM read/write error (SCN)

code code
U2 80 Display Lamp/Message
Phenomenon Detail
Section
Case 1 Cause
Check &
Remedy
Case 2 Cause
Check &
Remedy
Main Sub Adjustment value check sum error
Title
code code (SCN)
U2 81 Display Lamp/Message
Phenomenon Detail
Section
Case 1 Cause
Check &
Remedy
Case 2 Cause
Check &
Remedy
EEPROM version error
EEPROM write error
—
EEPROM trouble, Insertion
of EEPROM which is not
initialized or defective.
1. Check that the EEPROM
is properly inserted.
2. Use SIM 16 to cancel the
error.
SCN PWB EEPROM
access circuit trouble
1. To prevent against
deletion of the counter
data and the adjustment
data, record them with
the simulation. (When a
printer option is installed,
use SIM 22-1 to record
the counter data and the
adjustment data.)
2. Replace the SCN PWB.
3. Use SIM 16 to cancel the
error.
EEPROM (SCN) check sum
error
—
EEPROM trouble
1. Check that the EEPROM
is properly inserted.
2. Use SIM 16 to cancel the
error.
SCN PWB EEPROM
access circuit trouble
1. To prevent against
deletion of the counter
data and the adjustment
data, record them with
the simulation. (When a
printer option is installed,
use SIM 22-1 to record
the counter data and the
adjustment data.)
2. Replace the SCN PWB.
3. Use SIM 16 to cancel the
error.