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Section 5
TTS 58AXPJ
Model
58BXPJ
TROUBLESHOOTING TABLE
SYMPTOM
1).
Meter remains at mechanical zero
setting when power is applied. (Pilot Lamp
is on in TTS 58AXPJ)
2).
If
TTS 58AXPJ; Pilot Lamp does not
light when power is applied.
3)
.
Unable to get meter to read on scale
.
(Indicates
>
100°)
4).
Unable to get meter to read on scale.
Indicates<< 1° with no input signal.
5).
No signal at output of .PHASE HITS
terminals
.
5-2
PROBABLE CAUSE
Power Supply failure.
Check power supply
voltages for +5VDC and +12 VDC
.
Check
CR-5
.
If
TTS 58AXPJ; check T-2, CR-106
Ul01
1
andU102, checkQlOl andQ102.
Power Supply failure.
Check fuse F-1,
power switch, S-3 and 115/230 VAC selector
switch S-6.
Loss of test signal or local osc. failure.
Use. oscilloscope to observe
waveforms
at
indicated points outlined in Fig. 5-1 in
order to localize problem area
.
Logic
waveforms
indicated are for properly
operating set.
<::;heck transistor circuits associated with
U8 and U9.
Follow same procedure as out-
lined in 3 above.
Check Ql3 and associated circuitry
.
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