OHAUS RI Series, Maintenance Manual

Page: 30 / 84

01/09/2006
Page - 30 -
8.2
Replacing the main board on RI Series
Dismantling: see drawings 29270001 and 29270077.
- Switch off the scales, unplug the mains and external battery, remove internal battery.
- Remove the load cell support and fitted cross-piece assembly as indicated in paragraph 8.1
- Unplug all the cables that connect the main board.
CAUTION: carefully unplug the connectors and label them (especially the connectors for the
thermal print head).
- Unscrew the four EJOT PT K30X10 screws, using the n°15 Torx spanner.
- Remove the main board.
- Replace the load cell support and fitted cross-piece assembly (5 see drawing 29270001).
- Plug the main board /A/D board cable in on the main board.
- Replace the sensor support and fitted cross-piece assembly (5 see drawing 29270001).
- Tighten the four TBHC M4X20 screws (6 see drawing 29270001).
- Tighten the three screws which ground the load cell support to the main shell.
- Replace the 2 rubbers that are located behind the plate support cross-piece.
- Replace the fitted plate
- Plug the mains cable in again.
WARNING : recovering calibration parameters by license updating avoid the lost of
"GEO code" . Calibration on site is however possible by following calibration
procedure page 53 and 54
.
- Test for correct working.
Assembly:
- Install the new main board
-Tighten the four EJOT K30X10 screws.
- Plug in all the connectors (print head, key, serial
output, paper presence sensors, motor, keyboard,
displays, power supply, internal battery pack, cash
register).