NEC ELECTRA ELITE IPK II - DSPII-U10 Daughter Board; Replacing Memory Backup

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6 - 12 Installing ETUs (Circuit Cards)
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Document Revision 3 Electra Elite IPK II
4.1.6 Replacing Memory Backup
The battery on the CPUII( )-U10 ETU is used to retain the Clock/
Calendar and Last Number Redial (LNR) buffers for each station
when the CPU encounters a power loss. When the battery is fully
charged, the settings are retained for approximately three years.
The Lithium (CR2032) battery should be replaced every two years.
The system programmed memory (Customer Database) is stored in
Non-Volatile Memory and can only be erased by a First Initialization.
1. Turn off the KSU power.
2. Remove the CPUII( )-U10 ETU from the KSU.
3. Remove the battery from connector CN6.
4. Install new CR2032 battery in CN6.
5. Install the CPUII( )-U10 ETU in the KSU.
6. Turn on the KSU power.
4.1.7 DSPII-U10 Daughter Board
Systems that use VRS or In-Mail require the daughter board. VRS
and In-Mail are provided on a Compact Flash card that plugs into the
daughter board. The DSPDBU plugs into the CN7 connector on the
CPUII( )-U10 ETU.
On Blinking Blinking Off On
Finish format (SRAM,
Flash)
Blinking Off Off Off On DRAM error
Blinking Off Off On On FPGA version error
Blinking Off On Off On SRAM error
Blinking Off On On On Flash memory boot error
Blinking On On On On Flash memory data error
Blinking Blinking Blinking Blinking On
System Program reading
error
Blinking Off Off Off On System starting up
Table 6-3 CPUII( )-U10 Status
LED Indication
Status
LED5 LED4 LED3 LED2 LED1