Rapiscan TSA TPM-903B Operation And Service Manual - 6.0 Troubleshooting

TSA TPM903 Operations and Service Manual 

Doc: # 5058 Rev. A 

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This document is the exclusive property of Rapiscan Systems. 

Unauthorized use or distribution is strictly prohibited 

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6.0 TROUBLESHOOTING 

This guide is designed so that on-site personnel can service the TPM-903B and effect necessary 

minor repairs. It covers procedures and parts down to the board level. Any other problems should 

be referred to Rapiscan’s technical staff. 

When a problem occurs, it is important to isolate the cause as much as possible. This is 

accomplished by a step by step procedure which checks each of the assemblies for proper 

function and works upwards through the system. 

Begin with a physical inspection of the unit, then check the power supply and cabling. Examine 

the exterior of the enclosure for physical damage, faulty wiring, loose connections, etc. Open the 

enclosure and do the same inside, checking all wiring. If the physical inspection shows no 

obvious cause for the problem, proceed by checking the detectors, controllers, and other 

individual assemblies, as outlined in the following steps. 

After repairs have been made, a field calibration must be performed. (See Section 3.4.2.7. 

Calibration.) 

6.1. COMPONENT ACCESS 

The TPM Controller is mounted on the "#1" vertical pillar (Drawing 1). 

The IR occupancy detector is mounted on the controller on the "#1" pillar. To remove the 

occupancy detector, remove the two wing-nuts holding the mounting bracket to the controller 

back plate. Disconnect the connector, and the electronic assembly will be freed. Replace the 

electronic assembly and reverse the process to reassemble the detector. 

The LEDs are installed on the mounting plate for the controller circuit board. Desolder the wires 

and remove the LED. 

Install the replacement LED, and resolder the wires. 

The pillars contain the detector assemblies, the detector module, and the high voltage module. 

Verify problems by substituting the detectors. Return the defective pillar to Rapiscan for repair.