Agilent Technologies 87130A Switch User Manual


 
6-4 Agilent 87130A Operating and Service Manual
Troubleshooting
Fuse and Power Supply Check
Fuse and Power Supply Check
Fuse Check If the attenuator/switch driver fails to respond when the power switch is
turned on, the power line fuse should be checked. The 1 A, 250 V time delay,
power line fuse (part number 2110-0782) is located inside the AC input
module.
You will have to remove the top cover of the instrument to check the power
supply fuses. Two 3A, 250 V fuses, one with black and white wires
(+ 24 Vdc line) attached to the fuse holder and the other with violet and gray
wires (+ 5 Vdc line) attached to the fuse holder, are located on the deck, next
to the power supply board.
WARNING For continued protection against fire hazard, replace the power line fuse with
the same type and ratings only (1A/250V time delay).
Figure 6-2 Power Supply Test Points
Power Supply Check The power supply (part number 0950-2252) may be checked by measuring
the voltages between TP3 (ground) and the following test points:
TP1 24 V + 10%
5%
TP2 5.1 V
± 2%