Ohaus Indicator T71P

Unplug the Indicator from the AC power source

Remove the four screws from the Bottom Housing

Carefully separate the Top Housing and Bottom Housing

Disconnect cables from the Main PCB

Loosen terminal block’s set-screws and remove leads from Scale 2 Load Cell Connector J7

Remove hex screws connecting the RS232 Interface port to the Bottom Housing (T71P)

Verify communication parameters

Connect the Indicator to an external printer or computer

Check if printing occurs on the external device

Describe any issues encountered during the test

Separate the Top and Bottom Housing

Extract the plastic ribbon cable from the PCB’s Keypad Connector on the T71XW

Remove the protective backing from the new Membrane Switch and position it on the Top Cover

Re-position the Main PCB over its screw holes and tighten the screws

Reconnect the cables removed in previous steps

Re-insert the hex screws connecting the RS232 Interface port to the Bottom Housing on the T71P

Close the Housing and re-insert the four screws

Plug the AC Adapter or line cord into a suitable power source

Press the ON/ZERO Off button with the Indicator connected to power

Check the display during the self-test

If the display did not appear, check AC input and adapter/cord functionality

If the display was erratic, replace the PC board

Ensure the Indicator is ON and no mass is on the scale base.

Lift up on the scale base platform and check if the display indicates Error 8.2.

Release the platform and check if the display returns to zero.

Place a mass on the scale base platform that slightly exceeds the capacity of the scale base.

Check if the Indicator display indicates Error 8.1.

Remove the mass and check if the display returns to zero.

Ensure not to exceed Load Cell capacity during the test.