Power Supply Voltages Check - HP 54501A Service Manual

6-14 . Power Supply Voltages Check
1 .
Remove top cover from instrument .
2.
Refer to figure 6-10 for locations of power supply test points .
3.
Check voltages on power supply test points for voltages in figure 6-10 .
4.
The power supply can be isolated to check output voltages with the following steps.
a.
Remove power cable from instrument.
b .
Disconnect cable W1 from power supply as in figure 6-10 .
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k
ti NRM
This procedure is to be performed only by service-trained personnel aware
of the hazards involved (such as fire and electrical shock) .
c.
Load +5 .15 V supply with resistor (see Recommended Test Equipment in section 1) .
Use alligator clips to connect one end of the resistor to any pin 1-4, and the other end
to any pin 5-8 .
d.
Connect power cable and check for voltages in table 6-1 .
WARNING
Corn
+12V +12V -12V -5.2V +3 .5V +5 .15V +5 .15V ADJ
mower Supply Test Points
HP 54501A SERVICE
6-17