6. TROUBLESHOOTING page
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Model PRM-470B
6. TROUBLESHOOTING
This guide is designed so that on-site personnel can service the PRM-470B and effect necessary
minor repairs. It covers procedures and parts down to the board level. Any other problems
should be referred to factory authorized service personnel. Unauthorized repair voids warranty.
When repairs are completed and the instrument returned to operation, a copy of the Performance
Verification Checklist (section 5.4.) should be filled out and filed for future reference.
6.1. COMPONENT ACCESS
Refer to "PRM-470B Internal, 3D View" Drawing 2 (Appendix F.) for the following procedures.
6.1.1. PRCB-001 Board:
Refer to "PCRB-001 Control Board Schematic Diagram" Drawing 4 and "PCRB-001 Control
board Component Designator" Drawing 5 (Appendix F.)
The PRCB-001 board is mounted on standoffs on the lid of the enclosure. To access the PRCB
board, loosen the four screws securing the lid in place. The lid can now be removed to the limit
of the wiring harness.
To take out the board, remove the two Molex connectors on the top of the board and the four
phillips screws that secure the board to the standoffs. There is one additional connector on the
underside of the board which must also be removed before the board will be completely free.
To replace the board, attach the connectors and place the board on the standoffs. Replace the
four phillips screws to secure the board in place and re-attach the lid.
