SERVICE: PM3000 does not run off batteries.

Last reviewed: November 02, 2006
Article ID: 061102sab

The information in this article applies to:

• Ranger Power Master PM3000 all versions.

Target Audience.

This article is aimed at:

• Qualified Service Personnel for the Ranger Product Line.

Symptoms

All of the following:

1. The PM3000 runs correctly when powered from the AC input or the DC charger
2. The screen goes blank immediately that power is removed.
3. Without power present, the Logger cannot be started by touching the screen.
4. Recorded data is lost when the power is removed.

Cause

This is usually due to one of the following:

1. The Logger has been subjected to a shock, causing the batteries to move far enough within their retaining clips to go open circuit. The charge test will fail if this is the cause.
2. The battery output diode "D514" has failed. The charge test will pass.

Resolution

1. Unplug any voltage or current connections from the Logger.
2. Remove the Logger board assembly from the case in accordance with the service manual.
3. Visually inspect the batteries to ensure they are correctly placed in the center of the retaining clips and contact is made at both ends.

This picture shows the underside of a PM3000 board assembly.

This diagram shows the PCB layout viewing the board assembly from below with the input connector on the left hand side.

Using a DVM measure the voltage appearing on the locations indicated with respect to the screen.

If around 5 volts is present at the point marked "A" but no voltage is present at point "B" then the diode D514 has failed.

If no voltage is present at point "A" then one or more batteries are (probably) incorrectly seated in their clips and are open circuit.

References

none.

Back to Knowledge Base index

• THE INFORMATION PROVIDED IN THE PRONTO FOR WINDOWS KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. OUTRAM RESEARCH LTD DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL OUTRAM RESEARCH LTD OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF OUTRAM RESEARCH LTD OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: November 02 2006
© 2006 Outram Research Ltd. All rights reserved.