Argantix KDC 100-100, User Manual

Page: 101 / 137

User Manual
KDC Series II DC Power Supplies 91
8 Service
8.1 General
This section describes suggested maintenance and troubleshooting procedures. 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.
8.2 Basic Operation
Table 8-1: Basic Symptoms
PARAGRAPH PROBLEM
8.2.1 Poor Output Voltage Accuracy
8.2.2 Poor Output Voltage Regulation
8.2.3 Unit Shuts Down After 3-5 Seconds
8.2.4 No Output and no lights on front panel
8.2.5
No output but “Display” on front panel is on
8.2.7
Can‟t program DC supply on GPIB or RS232
8.2.1 Poor Output Voltage Accuracy
If the power supply exhibits poor programmed voltage accuracy, the following item may be at
fault:
Table 8-2: Poor Output Voltage Accuracy
CAUSE SOLUTION
The calibration is incorrect. Calibrate the output.
8.2.2 Poor Output Voltage Regulation
If the power supply exhibits poor voltage regulation the following item may be at fault:
Table 8-3: Poor Output Voltage Regulation
CAUSE SOLUTION
The Remote Sense lines are not
connected at the same point monitored by
the external voltmeter used for load
regulation check. Connect DC voltmeter to Remote Sense
lines on the Rear Panel Power Output
terminal strip.
The External voltage sense connection is
open. Check the sense connections. Make sure
not to reverse the sense polarity or
damage to the unit may occur.