CAUTION
TERMINALS 1, 2, AND 3 OF AR2 ARE AT B+ POTENTIAL. USE A
MEASURING DEVICE NOT HAVING A COMMON GROUND WITH THE
POWER SOURCE. USE A GROUND ISOLATING TRANSFORMER WHEN
USING AC POWERED TEST EQUIPMENT TO PREVENT DAMAGE TO THE C-
6533 UNDER TEST. (See Figure 10.)
Figure 10. Terminals 1 through 5.
(2)
Using your ME-30, measure the amplitude of the signal between AR2 terminals
2 and 1, and between terminals 2 and 3. A normal reading is 11.5 to 15.5 volts RMS. If the
reading is normal you would replace T4 (output transformer).
(3)
Perform equipment settings.
(a)
Remove signal input.
(b)
Turn DC POWER switch on MK-994/AR to OFF.
(4)
Measure the resistance between AR2 terminal 1 and 2 and between AR2
terminal 2 and 3, the normal reading should be 23-43 ohms.
(a)
If you have a normal reading you would perform step (4).
(b)
If your readings were abnormal, you would check for a shorted capacitor C22 by
using continuity checks. If the recorded resistance value is abnormal:
1.
Replace AR2.
2.
Replace transformer T4.
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