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Performance Verification
Accessing Test Points
This section describes how to disassemble your programmer so you can access
the test points, which are located inside the programmer.
CAUTION: Disassembling the programmer may void the service
warranty. Proceed at your own risk.
CAUTION: Many of the components in the programmer are static
sensitive. Observe standard handling precautions at all times.
Follow the steps below to check the calibration of your programmer:
1. Ground yourself and the programmer as described on page A-1.
2. Make sure the programmer is unplugged and that the power is off.
3. Position the programmer as shown in Figure A-1.
4. Using a #1 Phillips screwdriver, remove the two rear panel screws shown in
Figure A-1. Set the screws aside.
Figure A-1. Removing the Rear Panel Screws
BACK
PANEL
SCREWS
POWER
SWITCH
AC RECEPTACLE
PARALLEL PORT
REMOTE PORT
GROUND
CONNECTOR
TERMINAL PORT
0532-3
Note: Some early 2900s may have a third screw (represented by
the dotted circle in Figure A-1) that must be removed.
5. Position the programmer so the front (round) half is facing you.
6. Remove the three screws shown in Figure A-2 and set them aside.
Note: On some early 2900s, you must carefully fold back the black
foam to access the three screws.
7. Remove the top cover by lifting it straight up. Set the top cover aside.
8. Locate the waveform board inside the programmer. The rectangular
waveform board is located in the back half of the programmer and is shown
in Figure A-3.
A-2
3980xpi/3980/3900/2900 User Manual