Cable Testing And Repair - Honeywell VXP System Maintenance Manual

Repair and Cleaning
The battery replacement procedure is as follows.
1. Disconnect the Acquisition Unit from all cabling.
2. Remove the front end cap.
3. Pull the two PCB assemblies and the isolation plate forward approximately 1-2
inches.
4. Remove the four screws that attach the two 78-pin D connectors to the isolation
plate.
5. Carefully disconnect the two 78-pin D connectors from the Main PCB assembly and
lift them out of the isolation plate. The PCB assemblies are now free from the
harness and isolation plate.
6. Remove the two PCB assemblies from the chassis.
7. Carefully separate the two PCB assemblies from each other by disconnecting the
board-to-board connectors on each side and near the center of the boards.
8. Remove and replace the battery located at the rear of the Power Supply & Expansion
PCB assembly (the bottom board). Replace with C-H Part No. 764-B04 or
equivalent. See Table 5-1 for specifications.
9. Re-assemble in reverse order.
10. After applying power to the unit, examine the fault log to ensure that no battery
failure indication is present.
Specification
Chadwick-Helmuth Part No.
Battery Type
Battery Size
Voltage Rating
Current Rating

5.2 CABLE TESTING AND REPAIR

All cables should be inspected prior to operating or testing the VXP. If there is any obvious
damage to a cable, it must be repaired in accordance with Chadwick-Helmuth MPI-001. This
document covers all aspects of cable repair.
The cables can be tested using common equipment and the diagrams and schematics in this
chapter. Repair of the cables will be in accordance with the guidelines set forth in MPI-001. The
cables are shielded heavy-gauge wiring, with military standard connectors on each end. As some
of the cables are connected to optional equipment, the number and type of cables will vary.
Please note that the cable for the Strobex is connected directly to that equipment, and cannot be
repaired in the field. For this reason, no pinouts or schematic are provided for that accessory.
5-2 Honeywell
Table 5-1. Battery Specifications
Value
764-B04
Lithium
½AA
3.6
850 mAh