Replacing Memory Backup; Dspii-U10 Daughter Board - NEC Electra Elite IPK II System Hardware Manual

Document Revision 3
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LED Indication
LED5 LED4 LED3
On Blinking Blinking
Blinking Off Off
Blinking Off Off
Blinking Off On
Blinking Off On
Blinking On On
Blinking Blinking Blinking
Blinking Off Off
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.
Table 6-3 CPUII( )-U10 Status
LED2 LED1
Off On
Off On
On On
Off On
On On
On On
Blinking On
Off On
Electra Elite IPK II
Status
Finish format (SRAM,
Flash)
DRAM error
FPGA version error
SRAM error
Flash memory boot error
Flash memory data error
System Program reading
error
System starting up
Installing ETUs (Circuit Cards)