ARMY TM 5-6675-238-14
MARINE CORPS TM 08839A-14/1
Table 8-8. Tape Reader Testing and Troubleshooting Procedure - Continued
Malfunction indication/
Test procedure
Normal indication
corrective action
.
4.4e.
waveform B Same as step 4.4d
4.4f.
4.4g.
4.4h.
Connect oscilloscope than- Oscilloscope displays
nel A probe ground return to
shown in figure 8-5
ground (TB2 terminal 10,
TP5) and connect same
channel A probe to either
side of R10 on TB1 (TP33).
Refer to figure 8-3, sheet 2
of 2
Remove A4 and place AS
into A4 card cage position
Connect oscilloscope than- Oscilloscope displays
nel A probe ground return
shown in figure 8-5
to ground (TB2 terminal 10,
TP5) and connect same
channel A probe to either
side of R10 on TB1 (TP33).
Refer to figure 8-3, sheet 2
of 2
Connect oscilloscope than- Oscilloscope displays
nel A probe ground return
shown in figure 8-5
to ground (TB2 terminal 10,
TP5) and connect same
channel A probe to either
side of R9 on TB1 (TP35).
Refer to figure 8-3, sheet 2
of 2
waveform B Same as step 4.4d
waveform B Same as step 4.4d
4.4i.
4.4j.
4.4k. Connect oscilloscope chan-
Oscilloscope displays waveform B Same as step 4.4d
Press SPU REVERSE switch- REVERSE switch-indicator light Refer to table 8-6
indicator to off
goes off
Press SPU MEMORY LOAD MEMORY LOAD switch-indicator Refer to table 8-6
switch-indicator to on
lights
4.4l.
4.4m.
8-72
nel A probe ground return
shown in figure 8-5
to ground (TB2 terminal 10,
TP5) and connect same
channel A probe to either
side of R9 on TB1 (TP35).
Refer to figure 8-3, sheet 2
of 2
Connect oscilloscope channel Oscilloscope displays waveform B Same as step 4.4d
A probe ground return to
shown in figure 8-5
ground (TB2 terminal 10,
TP5) and connect same chan-
nel A probe to either side of
R10 on TB1 (TP33). Refer to
figure 8-3, sheet 2 of 2
Set tape reader SPOOLING
switch S1 to DISABLE po-
sition
