To Replace A Current Input Fuse; Electrostatic Discharge (Esd) Precautions; Table 5-2 Type Of Current Input Fuse - Agilent Technologies U3401A User's Manual And Service Manual

5 Disassembly and Repair

To Replace a Current Input Fuse

Both the mA and the A current input terminals are fuse protected. The
fuse for the mA input terminal is located on the front panel (see
The fuse is a 0.63 mA, 500 V fuse (refer to
that the fuse is faulty, replace it with one of the same size and rating.
The fuse for the A current input terminal is located inside the multimeter
(see
is a 25 A, 440 V fast- acting fuse (refer to
that the fuse is faulty, replace it with one of the same size and rating.

Table 5-2 Type of current input fuse

Electrostatic Discharge (ESD) Precautions

Almost all electrical components can be damaged by electrostatic discharge
(ESD) during handling. Component damage can occur at electrostatic
discharge voltages as low as 50 volts.
The following guidelines will help prevent ESD damage when servicing the
instrument or any electronic device.
• Disassemble instruments only in a static- free work area.
• Use a conductive work area to reduce static charges.
• Use a conductive wrist strap to reduce static charge accumulation.
• Minimize handling.
• Keep replacement parts in original static- free packaging.
• Remove all plastics, foam, vinyl, paper, and other static- generating
• Use only anti- static solder suckers.
74
page 79) and requires partial disasembly of the multimeter. The fuse
Type of fuse
0.63 mA, 500 V fuse
25 A, 440 V fast-acting fuse
materials from the immediate work area.
Table 5- 2). If you determine
Table 5- 2). If you determine
Part number
2110-1432
2110-1431
U3401A User's and Service Guide
page 15).