WEBSTER CHICAGO 79 - Page 4

bVICBSTER
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CH IC AG 0
BULLETIN 79P038
MODEL 79 AND MODEL 80
MECHANICAL SERVICE NOTES
Model 80 Wire Recorders and Model 79 Founda-
tion Unit mechanisms are accurately adjusted,
lubricated and tested at the factory. However,
adjustments in the field will be necessary if parts
are replaced or specific troubles indicate misad-
justment. The recommended corrections given
should be made only by a qualified radio service
technician. Service parts are available from your
distributor. All parts must be ordered by part
number, model number and serial number, stamp-
ed on the name plate.
A — TO REMOVE FROM CASE
MODEL 80 — SERIAL Nos.
5000 TO 11000
Remove Top Plate. Place small piece of
cardboard under Control Lever ( Fig. 1) so
panel will not be scratched in removing.
Remove knobs ( pull off). Remove 2 screws
and 4 hex nuts holding panel. Take out the
5 wood screws on each side in order to re-
move the unit. Entire unit may then be re-
moved from case by lifting straight up. DO
NOT TAKE OUT COUPLING SCREWS. The
coupling screws are the two hexagon screws
on each side that hold the Mechanical unit
to the Electrical unit. After the entire unit
has been removed from the case, these
screws may be removed if it is desired to
separate the Mechanical unit from the Elec-
trical Unit.
B — TO REMOVE FROM CASE MODEL
80 — SERIAL Nos. 11000 UP
Remove four screws from the bottom of the
case and one from each side. This permits
easy removal of the entire chassis assembly.
The sled type construction protects all work-
ing parts during service operations.
C— SPOOLS AND HEAD
If wire spills over the top or bottom of both
the take-up drum and the supply spool when
recording or rewinding, adjust the stroke of
the recording head by means of the record-
ing head adjusting screw ( illustration 80,
Fig. 11). This screw is reached by removing
the top cover ( Fig. 2) and inserting a screw
driver through the small hole shown in Fig.
11.
D — SHAFT ADJUSTMENTS
If wire spills over the top or bottom on only
the Drum or the Supply Spool, adjust the
proper shaft.
To adjust the height of the Take-up Drum or
Supply Spool shaft, follow the instructions of
Fig. 3. Be sure that there is proper clearance
between the collar and the main plate.
Wire recorders ( Serial Nos. 5000 — 11000)
may be adjusted through the holes provided
in the bottom of the case. Use care in mak-
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