Cpu Board Removal; Display Board Removal; Battery Replacement - Rice Lake 520 Installation Manual

2.6

CPU Board Removal

If you must remove the 520 CPU board, use the
following procedure:
1. Disconnect power to the indicator.
2. Unplug connectors J6 (load cell cable), J5
(serial communications), and J4 (digital I/O).
If an analog output board is installed,
disconnect the analog output cable. See
Figure 2-1 on page 7 for connector locations.
3. Remove brown and blue wire from J3
connector.
4. Unplug ribbon cable from J1.
5. Remove four Phillips head screws located in
each corner of CPU board.
6. Carefully lift CPU board out of enclosure.
To replace the CPU board, reverse the above
procedure. Be sure to reinstall cable ties to secure all
cables inside the indicator enclosure.
2.7

Display Board Removal

If you must remove the 520 display board, use the
following procedure:
1. Remove CPU board (see Section 2.6 above).
2. Remove four Phillips head screws in display
board and carefully remove display board.
To replace the display board, reverse the above
procedure. Be sure to reinstall cable ties to secure all
cables inside the indicator enclosure.
2.8

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.
System RAM data includes prompts and keyboard
locks. This information is lost if the battery loses
power and the indicator is disconnected from AC
power. To prevent loss of data, do the following:
• When battery voltage gets low, the indicator
display shows
low bat
this warning is displayed. The battery should
last seven years.
• Use the Revolution
EDP commands (see Section 10.1 on page 46)
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.
Caution
There is a risk of explosion if battery is
replaced by an incorrect type.
D is p o s e o f b at te ry p e r m an ufa c t u r e r
N O T E :
instruction.
. Replace the battery when
™
configuration utility or
Installation 9