4-1
CHAPTER 4
MAINTENANCE AND TROUBLESHOOTING
4.1 INTRODUCTION: If you encounter a
problem, the troubleshooting hints listed in
TABLE 4-1 below will help isolate the
nature of the problem.
4.2 MAINTENANCE: The amplifier
compartment, particularly areas around high
voltage components should be cleaned often
(using a soft bristled brush and vacuum
cleaner) to prevent visible accumulation of
dust. DO NOT blow air directly into the fan
input: this can over rev the motor and
damage the bearings.
SYMPTOM
POSSIBLE CAUSE/CURE
1. Will not turn on: nothing happens
when the ON switch is activated.
A] Fuse missing or open.
B] House wiring incorrect or breaker open.
C] Power cable to amplifier disconnected.
D] Fuse on HV-AC board A9 (81945) open.
E] Problem with low voltage power supply
on QSK board A11 (81949)
2. Lights turn on but no high voltage.
A] No HV will be present until amp is
switched to OPERATE mode (and timed out).
3. Relays A9K2 and A9K3 on 81945 HV-
AC board close but relay K1 does not.
Plate Voltage drops when RF is applied.
A] A9Q1 on 81945 HV-AC board is
defective.
B] A9K1 on 81945 is defective.
4. Relays A9K1, A9K2, A9K3 on 81945
HV-AC board close but no high voltage
when switched to OPERATE mode.
A] Interlock open, cover not tight
B] A9K2, A9K3 defective.
C] HV short to ground.
D] High voltage transformer disconnected.
E] High voltage bridge open.
TABLE 4-1 TROUBLESHOOTING HINTS
Summary of Contents for TITAN III 417
Page 19: ...2 6 BAND FREQUENCY LOAD TUNE ANTENNA NOTES FIGURE 2 2 MODEL 417 TUNING LOG ...
Page 20: ...2 7 FIGURE 2 3 TITAN III FRONT VIEW FIGURE 2 4 TITAN III REAR VIEW ...
Page 21: ...2 8 FIGURE 2 5 TITAN III TOP VIEW ...
Page 22: ...2 9 FIGURE 2 6 TITAN III BOTTOM VIEW ...
Page 40: ...5 15 FIGURE 5 21 SCHEMATIC DIAGRAM MODEL 417 ...
