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D i s a s s e m b l y G u i d e
Introduction
Tools Required
Replacement Level Supported
Prior to Disassembly
NPB-40
The NPB-40 can be disassembled into to all major component parts, including:
•
Front case with front panel keypad
•
Rear bottom
•
Display PCB
•
CPU PCB
•
Battery compartment door
Note: Some spare parts have a business reply card attached. Please fill out and
return the business reply card.
Caution: Observe ESD (electrostatic discharge) precautions when
disassembling and reassembling the NPB-40 and when handling any
components of the NPB-40.
The tools required to disassemble and reassemble the NPB-40 are:
•
Number one (medium) Phillips screwdriver
•
Torque driver, four inch/pounds (10 cm/kg)
The replacement level supported for the NPB-40 is to the printed circuit board
(PCB) and major subassembly level. When the problem has been isolated to a
suspected PCB, follow the procedures in Disassembly Guide on page 43, to
replace the PCB with a known good PCB. Check to see if the trouble symptom
disappears and that the NPB-40 passes all performance tests. If the trouble
symptom persists, swap back the replacement PCB with the suspected
malfunctioning PCB (the original PCB that was installed when you started
troubleshooting) and continue troubleshooting.
The NPB-40 the batteries must be removed prior to disassembly. Perform the
following procedure to remove the batteries.
1. Press the Power button to turn the NPB-40 off.
43
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Table of Contents
Troubleshooting
