Oki IP-6620 Maintenance Manual page 250

5.5.15 System Error 1650: EEPROM Initialization Check Error
<Description>
Could not normally read the parameters stored in the EPROM on the PCB-ASSY-IPB5-100.
This error is detected when performing keyword check and checksum in the parameter area after
turning the printer on.
<Faulty part>
(1) IC(EEPROM)
(2) PCB-ASSY-IPB5-100
<Action>
Restart the printer.
If the error persists, check the Items to be Checked on the table below, and perform the actions
starting from the top until the problem is solved.
No
1 EEPROM
2 PCB-ASSY-IPB5-100
5.5.16 System Error 1660: RSM Mask Memory Read/write Error
<Description>
The PCB-ASSY-IPB5-100's RSM mask memory was not read or written normally.
This error is detected through the process below:
(1) The printer is started;
(2) The printer writes test data on the mask memory; and
(3) Though the printer reads the data on the band memory, the read data is not same as the
written data.
<Faulty part>
PCB-ASSY-IPB5-100
<Action>
Restart the printer.
If the error persists, check the Items to be Checked on the table below, and perform the actions
starting from the top until the problem is solved.
No
1 Firmware
2 PCB-ASSY-IPB5-100
Chapter 5 Troubleshooting (Engine Section and USB Controller Section)
Items to be Checked
Items to be Checked
OKI Data Infotech Corporation CONFIDENTIAL
Action
Re-insert the EEPROM.
If the problem persists, replace the EEPROM.
Replace the PCB-ASSY-IPB5-100.
Action
Upgrade the firmware to the latest version.
Replace the PCB-ASSY-IPB5-100.
5-91