Cpu Board Removal; Battery Replacement; Replacement Procedure - Rice Lake 720i Technical Manual

3.8

CPU Board Removal

If the 720i CPU board must be removed, use the following procedure:
1. Disconnect power to the indicator.
2. Remove the backplate as described in
3. Unplug connectors for power to the board, serial communications, digital I/O and any installed option cards.
4. Remove any installed option cards.
5. Remove the five Phillips head screws and the kep nut from the CPU board.
6. Remove CPU board from the enclosure. If necessary, cut cable ties to shift cables out of the way.
To replace the CPU board, reverse the above procedure. Be sure to reinstall cable ties to secure all cables inside the indicator
enclosure.
3.9

Battery Replacement

The lithium battery on the CPU board maintains the real-time clock and protects data stored in the system RAM when the
indicator is not connected to AC power.
Data protected by the CPU board battery includes time and date, truck and tare memory, and onboard database information.
Use Revolution to store a copy of the indicator configuration on a PC before attempting battery replacement. If any data is
™
lost, the indicator configuration can be restored from the PC.
Watch for the low battery warning on the LCD display and periodically check the battery voltage on both the CPU board and on
any installed memory option cards. Batteries should be replaced when the indicator low battery warning comes on, or when
battery voltage falls to 2.2 VDC. Life expectancy of the battery is ten years.
3.9.1

Replacement Procedure

For best results, replace the battery while in weigh mode and with AC power applied. Use care not to bend the battery retaining
spring.
If the battery must be replaced with power removed, do the following immediately after restoring power:
1. Enter setup mode.
2. Navigate to the Version menu and press the
reset by using monitor mode to enter the RESETCONFIGURATION command followed by the RS command.
See Figure 3-2 on page 10
There is a risk of explosion if battery is replaced with the incorrect type. Dispose of batteries per manufacturer
WARNING
instruction.
Section 3.2 on page
RSConfig
for CPU board battery location and orientation (positive side up).
7.
softkey. If connected using Revolution, configuration can be
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Installation
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