Bogen CHALLENGER SOLID STATE SERIES C10 - Manual (Page 3)

OPERATION MAINTENANCE
POWER: The POWER switch on the front panel turns the
amplifier ON or OFF.
MIC: The MiC control on the front panel is used to adjust
the volume of the microphone input. Rotate the control
clockwise (to the higher numbers) to increase volume. Set
the cnntrnl to the minimum position (0) when the
microphone input is not used.
AUX: The AUX control adjusts the volume of the auxiliary
input.
TREBLE: Use the TREBLE control to adjust the tonal
balance of the amplifier output. The maximum clockwise
position provides flat frequency response and counter­
clockwise produces high frequency attenuation. This
control can also be used to remove high-frequency noise
(such as record scratch) by rotating it in the counter­
clockwise direction.
ACCESSORIES
WMT-1 LINE MATCHING TRANSFORMER: The Bogen
WMT-J line-matching transformer provides an impedance
match between the amplifier and a 0 level, 500/600-ohm
line. This may be a telephone line connected to the
switchboard for internal paging or used with a wired music
system. No soldering is required to connect the WMT-1 to
the amplifier.
To connect the input from a balanced 500/600-ohm
telephone line, mount the WMT-1 on the rear panel of the
amplifier, using the holes indicated on the rear panel.
Connect the input line to the three-sciew terminal board on
the WMT-1, Connect the phono plug on the WMT-I cable
to the AUX jack on the rear of the amplifier. If this jack is
being used for other sound inputs, the WMT-1 may be
connected to the
MIC input. In order to do this, the WMT-1
wiring must be modified as described in the instruction
sheet supplied with the WMT-1,
MODEL BRC RECORD CHANGER: This accessory is a
3-speed ac operated record player and automatic record
changer. A tone arm housing a dual-stylus flip-over
cartridge for standard or LP records is furnished with the
unit.
RPK-35 RACK PANEL: The Bogen Model RPK-35 rack
panel is designed to mount the amplifier in a standard
19-inch sound rack. The rack panel is finished in gray
enamel.
WMK-1 IN-WALL MOUNTING KIT: The Bogen Model
WMK-1 In-Wall Mounting Kit is designed to mount the
amplifier flush in a wall. Depth of the mounted unit is 3V4
inches.
IT-1 IN-LINE MICROPHONE TRANSFORMER: The IT-1
features full frequency response 20 - 20,000 Hz, mag­
netically shielded, matches 150 - 250 ohm microphones to
Hi-Z inputs. The input connector is Cannon XLR-3-12 and
the output connector is Switchcraft 250-1F,
CAUTION
There are no user replaceable parts within the
unit. Have all internal servicing done by a
qualified technician.
BOGEN SERVICE
We are interested in your Bogen equipment for as long as
you have it. If trouble ever develops, do not hestitate to ask
our advice or assistance. Information can be obtained by
writing to Service Department, Bogen Division, P.O. Box
500, Paramus, N.J. 07552.
When communicating with us, give the model and scries
designation of your unit. Describe the difficulty and
include details on the electrical connections to associated
equipment, and list such equipment. When we receive this
information, we
Will send you service information if the
trouble appears to be simple. If the trouble requires
servicing, we shall send you the name and address of the
nearest Bogen
authorized service agency to which you can
send your unit for repairs.
When shipping your unit, pack the amplifier well, using
the original shipping carton, or a similar container and filler
niatedal, to prevent damage In transit. Send the unit, fully
insured and prepaid, via railway express. Do not ship via
parcel post unless so instructed. The unit will be promptly
repaired and returned to you express prepaid.
OVER LOAD PROTECTION
The amplifier output is protected against overload and
shorted speaker lines by a thermostat enclosed in the
power transformer. If the breaker opens, the amplifier will
have no output. Set the ac power switch to off and wait a
reasonable time for the breaker to reset. Return the ac
power switch to on. If the breaker trips again, do not
attempt to reset it but have the trouble investigated by a
qualified technician.
REPLACING TRANSISTORS
When replacing the output transistors, clean all foreign
matter from the heat sink, insulator, and transistor. Brush a
generous amount of silicon compound such as Dow Corning
No. 340 to completely cover both surfaces of the insulator
(Part No. 16-9278-01). Place the insulator between the heat
sink and the replacement transistor. Use the original
transistor mounting hardware to mount the replacement
transis Lur.
CAUTION
All transistors are soldered to ensure maximum
reliability. When soldering leads, use a heat sink
(such as a small alligator clip) between the
transistor and the source of heat.
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