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MAINTENANCE
Model 2001
still more than 2 MHz, loosen the screw holding the TAPE
-
IDLER
GUIDE and rotate the GUIDE so the TAPE can be disen-
I
gaged from the sprockets o n the TAPE DRIVE. Disengage
the TAPE from the TAPE DRIVE sprockets and advance
the tape one sprocket i n the opposite direction o f the fre-
quency error.
Engage the TAPE o n the sprockets, reposi-
tion the TAPE GUIDE and tighten the screw. Again disen-
gage the IDLER and turn the TAPE DRIVE t o indicate zero
frequency. The Front Panel frequency control thumb
wheel must be held against its mechanical stop during the
IVE
ON
entire adjustment procedure.
Figure 5-7. Tape Drive
POWER
PLUG
REMOTE
JACK
Figure 5-8. Power Supply
5.5 CALIBRATION PROCEDURE
calibrating. I n general, calibration must be performed in the
sequence given. Refer t o Figures 5-8, 5-9 and
5-17
for
ad-
Remove top cover, bottom cover, left side panel and M2H
justment and test point location.
module cover. Allow a 15 minute warm-up period before
MAINTENANCE
still more than 2 MHz, loosen the screw holding the TAPE
GUIDE and rotate the GUIDE so the TAPE can be disen-
gaged from the sprockets on the TAPE DR I VE. Disengage
the TAPE from the TAPE DRIVE sprockets and advance
the tape one sprocket in the opposite direction of the fre-
quency error.
Engage the TAPE on the sprockets, reposi-
tion the TAPE GUI DE and tighten the screw. Again disen-
gage the IDLER and turn th.~ TAPE DRIVE to indicate zero
frequency.
The Front Panel frequency control thumb
wheel must be held against its mechanical stop during the
entire adjustment procedure.
TAPE
TAPE
DR/V£ SPROCKET
TAPE
GUIDE
FRONT~
PANEL
-'''-.
Model 2001
r -
IDLER
:CL£R SPl<JN6
Figure 5-7. Tape Drive
R9
DI<IV.f'
PINION
POWER
PLUG
REMOTE
JACK
Figure 5-8. Power Supply
5.5 CALIBRATION PROCEDURE
Remove top cover, bottom cover, left side panel and M2H
module cover. Allow a 15
minute
warm-up period before
5-8
calibrating
.
In general, calibration must be performed in the
sequence given. Refer to Figures 5-8, 5-9 and 5-17 for ad-
justment and test point location.
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