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AR-BC320 TROUBLESHOOTING 11 - 23

Main

code

Sub

code

Title

RTC read trouble

U1 02 Display Lamp/Message

Phenomenon Detail Abnormal value is read

from the RTC on the ICU

PWB.

Section —

Case 1 Cause RTC circuit abnormality

Check &

Remedy

Set the time again with the

key operation, and check

that time advances

properly.

Check the RTC circuit.

Main

code

Sub

code

Title

EEPROM read/write error (ICU

detection)

U2 00 Display Lamp/Message

Phenomenon Detail EEPROM version error

EEPROM write error

Section —

Case 1 Cause EEPROM trouble.

EEPROM is not initialized.

Check &

Remedy

1. Check that the

EEPROM is properly

set.

2. Use SIM 16 to cancel

the error.

Case 2 Cause ICU PWB EEPROM

access circuit trouble

Check &

Remedy

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.

Main

code

Sub

code

Title

EEPROM check sum error (ICU

detection)

U2 11 Display Lamp/Message

Phenomenon Detail EEPROM (ICU) check sum

error

Section —

Case 1 Cause EEPROM trouble

Check &

Remedy

1. Check that the

EEPROM is properly

set.

2. Use SIM 16 to cancel

the error.

Case 2 Cause Control circuit freeze by

noises.

ICU PWB EEPROM

access circuit trouble.

Check &

Remedy

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.

Main

code

Sub

code

Title

Production No. data discrepancy

U2 30 Display Lamp/Message

Phenomenon Detail The production No.

recorded in the PCU differs

from that recorded in the

ICU.

Section —

Case 1 Cause EEPROM is not

exchanged when replacing

the PCU/ICU PWB.

Check &

Remedy

Check that the EEPROM is

properly installed. When

replacement, check that

the EEPROM before

replacement is inserted to

the board after

replacement.

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[11] TROUBLESHOOTING 1
6. Details 3

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