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User and Programming Manual - Rev H
California Instruments
May 2000
P Series
32
7. Service
7.1 General
This section describes the suggested maintenance and troubleshooting procedure. The
troubleshooting procedure is divided into two sections. The first section deals with basic
operation and connection of the equipment. The second section requires opening the unit and
using the LED indicators and a simple multimeter to troubleshoot the unit down to the module
level. Only a qualified electronic technician should attempt this level of troubleshooting.
7.2 Basic Operation
Table 3: Basic Symptoms
PARAGRAPH
PROBLEM
7.2.1
Poor Output Voltage Regulation
7.2.2
Overload Light On
7.2.3
Distorted Output
7.2.4
Unit Shuts Down After 3-5 Seconds
7.2.5
No Output and no lights on front panel
7.2.6
No output but “power on” LED on front panel is lit.
7.2.1 Poor Output Voltage Regulation
Table 4: Poor output voltage regulation
CAUSE
SOLUTION
Unit is overloaded
Remove overload
Unit is programmed to wrong voltage range.
Select correct voltage range.
Input line has fallen below spec. limit.
Check supply voltage.
7.2.2 Overload Light is On
Table 5: Overload light on
CAUSE
SOLUTION
Unit is overloaded
Remove overload
Unit is switched to high voltage range.
Select correct voltage range.
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