3
Disassembly
3-1
3.1 Introduction
The information in this section explains how to disas-
semble the Model 2001. Also discussed are handling
and cleaning considerations as well as the procedure to
change the main CPU Þrmware in the event of an up-
grade. This section is organized as follows:
3.2 Handling and cleaning precautions
Covers
general precautions to take when troubleshoot-
ing inside the unit, and cleaning procedures
when replacing parts.
3.3 Static-sensitive devices
Explains handling
procedures for static-sensitive devices.
3.4 Case cover and shield removal
Explains how
to remove the case cover. Also covered is the re-
moval of the top shield of the analog board to al-
low access to analog circuitry for trouble-
shooting.
3.5 PC-board removal
Provides the procedures
for removing the digital board, A/D converter
board and the analog board.
3.6 Front panel disassembly
Explains how to re-
move the display board and/or the front panel
switch pad.
3.7 Cooling fan removal
Explains how to remove
the cooling fan from the chassis.
3.8 Firmware replacement
Provides the proce-
dure to change Þrmware.
3.9 Instrument re-assembly
Provides some gen-
eral guidelines to follow when re-assembling the
Model 2001.
3.10 Assembly drawings Ñ
Provides mechanical
drawings to assist in the disassembly and re-as-
sembly of the Model 2001.
3.2 Handling and cleaning precautions
When servicing the instrument, care should be taken
not to indiscriminately touch PC board traces to avoid
contaminating them with body oils or other foreign
matter. Mother board areas covered by the shield have
high impedance devices or sensitive circuitry where
contamination could cause degraded performance.
3.2.1 PC-board handling
Observe the following precautions when handling PC-
boards:
¥ Wear clean cotton gloves.
¥ Handle PC-boards only by the edges and shields.
¥ Do not touch any board traces or components not
associated with the repair.
¥ Do not touch areas adjacent to electrical contacts.
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