Agilent Technologies Comprehensive Guide for Troubleshooting Agilent Power Supply Models 6031A and 6032A

	AC Input Wire	Terminal Destination
from	color	designator	location
L6 (chassis)	white	P	left rear
RFI filter	white/gray	N	behind A1K1
Circuit breaker	white/brown/gray	L	behind A1K1
L6 (chassis)	white		A1K1 front armature

c.Remove the following mounting screws, all Pozidriv:

2 (1 each) from the output bus bars

7 from the A1 board

4 from transformer AlT2

4 from transformer AlT3

2 from relay AlK1

4 inside-cover mounting posts 5/16 hex

d.Lift the A1 board up and toward the rear, then remove the wires from the front panel switch A3S1.

A1 Designator	Wire color	A3S1 Position (Rear View)
A	white/gray
B	gray	S1
C	white/brown/gray	B - - A
D	white/red/gray	C - - D

Install the A1 board by reversing the above steps. Be careful to follow the wire color code.

Overall Troubleshooting Procedure

The overall troubleshooting procedure for the unit involves isolating the problem to one of several circuit blocks and troubleshooting the block individually. The GPIB/microprocessor related circuit blocks are located on the A3 (front panel) and the A8 (GPIB) boards. They are referred to collectively as the GPIB section. The power supply circuit blocks are on the A1 (main), the A2 (control), the A4 (FET), and the A5 (diode) boards. They are referred to collectively as the power section.

The flowchart of Figure 3-1 provides troubleshooting isolation procedures to guide you either to the appropriate circuit or to one of the detailed troubleshooting procedures in this section. The purpose of the flowchart is only to isolate the problem to a specific area of the power supply. If you have already isolated the problem, proceed directly to the applicable troubleshooting section.

Table 3-1 lists the error codes that may appear on the front panel when the unit performs its internal selftest. Along with the error codes, the table also identifies various circuits or components that may have caused that error code to appear.

In the Power Section Troubleshooting, Tables 3-10 and 3-11 give various power supply symptoms that identify the corresponding board, circuit or components that may have caused that symptom. The symptoms in Table 3-10 may become apparent when running the Performance Tests in Section 2.

GPIB Section Troubleshooting

The GPIB section troubleshooting consists of primary and secondary interface troubleshooting. Signature analysis is required to troubleshoot the primary and secondary processor as well as the front panel board. Other circuits on the GPIB board, such as the voltage and current DACs, can be checked using either signature analysis or the front panel controls. The readback circuits cannot be checked using signature analysis. Figure 3-2 illustrates the test setup that allows access to the GPIB board components for troubleshooting.

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