-15-
rear housing (base) from the bezel. Lift the keyboard
assembly out through the bezel.
C.
Separate the two circuit boards by gently
pulling them apart.
D.
Disconnect the green wire at the stud on
the keypad circuit board.
E.
Observe the slide switch connector’s orien-
tation and then disconnect the slide switch connector.
F.
After repair or replacement, reconnect the
green wire and slide switch connector. Ensure the
slide switch connector is reconnected in the proper
orientation—white wire toward the edge of the
circuit board and the connector’s wires away from the
component side of the lower circuit board. Reas-
semble the control head using the previously re-
moved screws. Reassemble the control head in its
bracket (if used), and insert the modular connector in
the receptacle.
6-3. SLIDE SWITCH REPLACEMENT.
1.
Disassemble the control head as described
in paragraph 6-2.
2.
Observe the orientation of the slide switch.
Remove and retain the knob, the two torx head
screws and the switch bezel.
3.
Place the new switch in position with the
same orientation as the old switch.
4.
Secure the switch in position using the
previously removed switch bezel and phillips head
screws. Install the switch knob.
5.
Reassemble the control head as described
in paragraph 6-2.
6-4. AMPLIFIER/SIGNALMASTER/RELAY UNIT.
A.
General.
Any competent TV repairman or electronic
technician should have little difficulty in tracing a
malfunction, should any occur. For emergency
replacement of any of the small components, care
must be used when soldering. Heat easily damages
transistors, capacitors and circuit boards. It is
therefore advisable to use longnose pliers or a similar
heat sink on the lead being soldered.
6-1. GENERAL.
For warranty service, contact your local Dis-
tributor.
The factory can and will service your equipment
or assist you with technical problems that cannot be
handled satisfactorily and promptly locally.
Communications and shipments should be
addressed to:
Service Department
Federal Signal Corporation
2645 Federal Signal Drive
University Park, IL 60466
1-800-433-9132
6-2. CONTROL HEAD.
The SS2000-LMS control head consists of two
circuit boards stacked on top of each other. See figure
6-1. To disassemble the control head, proceed as
follows:
A.
Disconnect the control head cable at the
control head. Remove the control head from its
bracket (if used).
B.
Remove and retain the four screws from the
rear of the control head. Separate the control head
Figure 6-1. Control Head Disassembly.
S
mart
S
ystem
®
-
LMS
OF
F
1 2
3
290A3913-17
BEZEL
(TOP)
BASE
4-40 x 5/8" PHILLIPS
ROUND HEAD MACH.
SCREWS (4)
KEYBOARD ASSEMBLY
Ra
pid
be
ep
in
dic
ate
s lo
w v
olta
ge
.
CO
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