Ac Line Fuse Replacement; Semiconductor Junction Measurements - HP 3476A Operating And Service Manual

Section III Model 3476A
3-30. SEMICONDUCTOR JUNCTION MEASUREMENTS.
b. Remove and replace fault t [ Ise.
To avoid possible damage to the Multimeter,
insure that the correct fuses are used for re-
placement in the Input Protection circuit.
c. Push fuses firmly into their receptacles and slide the
Input Panel forward to hold fuses in place and align the
input jacks.
NOTE
Multimeter test lead banana plugs can be used
as a tool to hold the fuses in place while sliding
the Input Panel forward.
3 28. AC Line Fuse Replacement.
3-29. Refer to Section V for instruction on the replace-
ment of ac line fuse.
3-31. Due to the low output current on the higher ohms
ranges, the Multimeter must be downranged to the lowest
ohms range in order to measure semiconductor junction
(diode) resistance. This can be easily accomplished by the
following procedure:
a. To measure the forward resistance, connect the cath-
ode of the diode to the COM terminal and the anode to the
sw
terminal.
b. Press the A pushbutton. This causes the instrument
to downrange.
c. Press the IcS2 pushbutton and read the forward resis-
tance on the display.
d. To measure the reverse resistance of a diode, reverse
the input connections to the diode and repeat Steps b and
c.
3-4