Samsung CLX-8640 series Service Manual page 72

2. Product specifications and Description
3) MSOK
MSOK PBA is used to store all system information and consists of a serial flash memory, a EEPROM and a XCRUM. The
flash memory(4 MB byte) and EEPROM(256K bit) are used for all system operation (system parameter, device status,
tech information, and service information).
NOTE
When a main board needs to be exchanged, the MSOK PBA should be re-installed to the new main board to retain the system
information.
4) FAX JOINT PBA
The FAX JOINT PBA is used for interfacing between the main board and modem PBA. It uses UART for interface.
•
Information
-
Part Code : JC92-02439A
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Part Name : PBA-FAX JOINT
•
Connection
1
2
2-60
Main PBA I/F connector
Modem Card I/F connector
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