Maintenance - Bell System Practices Plant Series Installation, Operation And Maintenance Manual

e Yell ow off-normal leads are placed across
loudspeaker (P3 and P4 leads) in speakerphone
installations.
Telephone Set Connections
5.03 Fig. 13 shows typical connections to rotary
and TOUCH-TONE telephone sets.
Key Equipment Connections
The KS-16844 Rapidial may be connected
5.04
to 4A key equipment or 400-type mountings
as shown in Table F.
Switchboard Connections
The KS-16844 Rapidial may be connected
5.05
to the various type switchboards listed in
Table G.
6.

MAINTENANCE

Disconnect power cord before removing
housing.
disconnected when not required for
immediate maintenance operations.
6.01 Maintenance on Rapidial is limited to items
covered herein.
6.02 Housing is removed from Rapidial in the
following manner:
einvert Rapidial, loosen scan knob locking
screw, and remove scan knob (Fig. 6).
eLoosen four captive housing screws.
eTurn Rapidial right side up and remove
housing.
S h o u ld R a p i d ia l f a il to operate after
6.03
depressing start bar, check the following:
eAC power source.
e24C, 2-ampere fuse located on terminal strip
in power supply (Fig. 4).
e Voltage between terminals 2 and 1, and 2
and 3 on terminal strip in Rapidial with
voltmeter (Fig. 5).
Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Apr 29, 2012
BSP 512-115- 100-i04 1970-10..0 7.jpg
P o w e r should r e m ain
eBurnish K1 relay contacts (Fig. 7).
eStart bar travel with housing in place (see
3.04 and 3.11).
6.04 Replacement of parts in List 1 or List 10
Rapidial is limited to tape assembly.
remove tape assembly, proceed as follows:
(1) Disconnect recording head plug from jack
(Fig. 8). On List 12 cartridges disengage
scan motor power lead plug from jack (Fig. 9).
(2) Release three base-locking clamps by turning
screws 1/4-turn counterclockwise (Fig. 7, 8,
and 10).
(3) Loosen retaining screw on front right side
of tape assembly (Fig. 7 and 11).
(4) Grasp tape assembly with right hand on
either side of writing tape window frame.
Lift slowly, carefully disengaging recording head
carriage pin from hole in draw tape tab (Fig. 7,
8, and 10).
6.05 To insert tape assembly in Rapidial, proceed
as follows:
(1) Make certain start bar mechanism is not
operated. If operated, plug in power cord
momentarily until Rapidial has recycled.
(2) Grasp tape assembly as explained in 6.04.
Carefully lower tape assembly into position,
making certain recording head carriage pin
properly engages hole in draw tape tab (Fig. 7,
8, and 10).
(3) Lift front of tape assembly sufficiently to
allow record bar leaf spring to clear record
bar latch. Hold spring up with 3 - 112 inch
screwdriver and lower front of tape assembly
into position, allowing record bar leaf spring to
rest upon record bar latch (Fig. 7 and 11).
(4) Grasp in right hand and position tape assembly
over unit.
(5) Place wiring from motor around the front
and left side of the cartridge assembly.
21:43:05
ISS 4, SECTION 512-115-1 00
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