Inter-m M-500, M-1000, M-700 Operating Manual
OPERATING MANUAL
POWER
AMPLIFIER
M-500/700/1000
11
UNPACKING AND INSTALLATION
Although it is neither complicated to install nor difficult to operate your power Amplifier, a few
minutes of your time is required to read this manual for a properly wired installation and becoming
familiar with its many features and how to use them. Please take a great care in unpacking your set
and do not discard the carton and other packing necessary to return your set for when moving your
set and are required if it ever becomes necessary to return your set for service. Never place the unit
near radiators, in front of heating vents, to direct sun light, in excessive humid or dusty location to
avoid early damage and for your years of quality use. Connect your complementary components as
illustrated in the following page.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
This symbol is intended to alert the user to the
presence of uninsulated “dangerous voltage”
within the product’s enclosure that may be of
sufficient magnitude to constitute a risk of electric
shock to persons.
This symbol is intended to alert the user to the
presence of important operation and maintenancy (servicing) instructions in the literature
accompanying the appliance.
Caution: To prevent electric shock do not use this (polarized) plug
with an extension cord, receptacle or other outlet unless
the blades can be fully inserted to prevent blade exposture.
Attentions: Pour prévenir les chocs électriques ne pas utilizer cette
fiche polarisée avec un prolongateur, une prise de
courant on une autre sortie de courant, sauf si les
lames peuvent étre insérées à fond sans en laisser
aucune partie à découvert.
22
FEATURES
• SUBSTANTIAL PROTECTION CIRCUITRY
To insure stability and reliability against over current and overheating extra protection circuitry is
provided. In addition, turn on delay and DC detection circuitry is provided to protect the loudspeaker.
• BRIDGED MONO FUNCTION
These stereo amplifiers can be used for monoral powerful sound by selecting the mode switch.
• VARIOUS DISPLAY
To confirm the operating status, LED displays of protection, clip, and signals are provided on front
panel.
• COMPACT SIZE
For valuable saving in rack space and slim exterior view, these amplifier is designed within
compact size.
• SOFT-START SYSTEM
To prevent inrush current when turn on the amplifier, soft-start circuit is provided on primary power
lines.
33
FRONT PANEL CONTROLS
1. POWER SWITCH AND INDICA TOR
The power switch is used to turn on and off the AC main power.
The power indicator lights up when the amplifier is powered ON.
2. PROTECTION INDICA TOR
This red LED indicator lights up for approximately six seconds when the amplifier is powered
ON, indicating that the soft-start protection system is working. No sound is output during softstart up. If one of the protection systems is activated during normal use, this indicator lights up
and no sound is output. The speaker system is actually disconnected from the amplifier outputs
when this indicator lights up. The protection systems are activated when overheating occurs or a
DC voltage is present at the amplifier outputs. If the problem is corrected, the protection systems
deactivate automatically , this indicator goes out, and normal amplifier operation is resumed.
3. CLIP INDICA TORS
CLIP indicator on each channel illuminates when distortion reaches or exceeds approximately
0.1%, indicating that the amplifier is being driven by excessively high inputs.
4. OUTPUT LEVEL INDICA TORS
Output level indicating LEDs indicate the output level of this amplifiers. These LEDs illuminate
when the outputs are –40dB and –20dB of rated power.
5. INPUT ATTENUATORS
Separate level controls are provided for channel one and channel two input, clockwise rotation
of the controls increase level. These are 21-step detented input signal attenuators.
6. HANDLES
You can handle this amplifier easily by using these handles.
10111213141618212723456789
1112131416182127801001234567890
0
CHANNEL1
PROT
CLIP
-20dB
-40dB
10111213141618212723456789
1112131416182127801001234567890
0
CHANNEL 2
PROT
CLIP
-20dB
-40dB
POWER
POWER AMPLIFIER
1000
M
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