Table of Contents
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Troubleshooting
Function Specific Troubleshooting
To Check the USB (USBTMC) Interface
Procedure
Connect the USB cable between the controller PC and the E4981A. Turn the controller PC
on. If the E4981A cannot detect the controller PC, the problem seems in the USB
(USBTMC) Interface of the PPMC PCA is suspected.
To Check the Handler Interface Function
Perform this test only when troubleshooting the Interface Board. This test verifies the
handler interface functions.
Equipment
Table 4-5
Equipment List of the Handler Interface Function Test
Handler Simulator
Procedure
Step 1. Disconnect the power cable from the E4981A and allow 1 minute for the internal
capacitors to discharge.
NOTE
Dangerous energy/voltage exists when the E4981A is in operation, and for a time after it is
powered down. Allow 1 minutes for the internal capacitors to discharge.
Step 2. Remove the PSU Deck Assembly according to the procedure for describing in
Assembly Removale" on page
NOTE
The Interface Board contains electronic components that can be damaged by static
electricity through electrostatic discharge (ESD). To prevent ESD damage, maintain
frequent contact with any bare sheet metal surface on the chassis. A grounding wrist strap
(or similar device) is useful for this purpose. Handle the board carefully at all times. Avoid
touching electronic components or circuit paths.
NOTE
Before performing
order to return them to the same settings at the end of this function test.
Step 3. Set the jumpers and switch on the Interface board to the same settings as when the board is
shipped from the factory. Refer to
60
Keysight p/n 04278-65001
95.
Step
3, note the jumper and switch settings on the Interface Board in
Figure
4-9,
Table
4-6, and
Table
4-7.
"PSU Deck
Chapter 4
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Table of Contents
Troubleshooting
