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QSC 1100, Руководство пользователя

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V:  MAINTENANCE AND SERVICE

5.1 CLEANING

The faceplate and chassis can be cleaned with a soft cloth and mild non-abrasive cleaning solution, such as Windex.  Avoid
cleaning powders or scrubbing pads, as these will scratch and dull the paint.  Be sure to unplug the unit prior to cleaning.
Do not apply liquid directly to the surface.  Dampen the cloth with the cleaning solution and wipe gently.  You may wish
to buff the surface lightly with a dry soft cloth.

5.2 DUST REMOVAL

After prolonged use, especially in dusty environments, the heat sinks may become clogged with dust.  This will interfere
with cooling and lead to higher temperature operation and reduced life.  Dust build-up can be most easily removed by
brushing or directing an air jet between the fins of the heat sinks.

5.3 USER MAINTENANCE

There are no periodical “tune-up” adjustments required;  the amplifier should provide stable performance until parts fail
from age.  Internal servicing must be referred to qualified personnel.  The amplifier may be inspected for loose screws on
the outside.  If any loose parts rattle around on the inside when the amp is turned over in all directions, please have it
serviced immediately, as a loose part could lodge in a dangerous place and cause further damage or shock hazard.

5.4 OBTAINING SERVICE

If the amplifier isn’t working properly, please consult the troubleshooting chart in Section 3.9.  If proper operation cannot
be restored, the amplifier may require service.  This must be performed by qualified technical personnel, to avoid shock
hazard or improper repairs.  To obtain the location of the nearest authorized Service Center, please contact your QSC
dealer or the QSC Service Department—1-800-772-2834.

Please note that the Series One warranty does not cover repairs made by non-authorized service personnel, and that
improper repairs may void future warranty coverage.

If the amplifier is returned to the factory for service,  you must first obtain an R.A. number (“Return Authorization)
from the QSC Service Department. The amplifier must be sent in the original type shipping carton. If you have not saved
your carton, see if your dealer has one, or call the QSC Service Department to have an empty carton sent for shipping.
The Series One warranty does not cover shipping damage caused by returning an amplifier in the wrong carton.

Содержание 1100

Страница 1: ...1 Owner s Manual A U D I O Rev C Model 1100 Model 1200 Model 1400 Model 1700 SeriesOne TD 000027 00 ...

Страница 2: ...r enviter les risques d incendie ou d electrocution n exposez pas cet article a la pluie ou a l humidite AVIS RISQUE DE CHOCK ELECTRIQUE NE PAS OUVRIR SAFEGUARDS Electrical energy can perform many useful functions This unit has been engineered and manufactured to assure your personal safety Improper use can result in potential electrical shock or fire hazards In order not to defeat the safeguards ...

Страница 3: ...e to include a copy of the sales receipt your name return address and phone number Mark the package Attention Service Department 2 Call QSC s Service Department 1 800 772 2834 and obtain a Return Authorization R A number Ship the product prepaid to QSC Audio Products We recommend UPS 3 We will determine if the product is under warranty a If it is we will repair and ship it back to you at no charge...

Страница 4: ...LRplugs screwlugstothebarrierstrip or1 4 inchphone plugs ring tip sleeve for balanced inputs Speaker connections are made with 5 way binding posts The steel chassis of the 1200 1400 and 1700 is a 14 gauge single piece design with integral rack mounting ears The 1100 chassis features single piece aluminum extrusions that form the sides of the chassis and feature integral rack mounting ears and heat...

Страница 5: ...spect 2 2 IMPORTANT PRECAUTIONS 2 21 The power must be OFF when making any connections If you connect plugs with the power on especially in dry environments static sparks or bad cables can cause pops or hums which can damage speakers 2 22 When first powering up the amp have the amplifier Gain controls all the way off in case of defective cables or hookups Turn the Gain controls up gradually until ...

Страница 6: ...ed on the rear panel see the rear panel illustration for details They come factory set for normal stereo operation switches 1 2 and 7 8 up See section 3 5 for other cases 2 35 Octal Socket For normal operation nothing should be plugged into the octal socket It comes from the factory with a protective label to prevent corrosion of the pins 2 36 Input Connections The input polarity is as follows 1 4...

Страница 7: ... Diode indicators monitor the operation of the amplifier A green LED serves as the pilot light to indicate that power is on Each channel has a red Clip indicator that will show any distortion in the amplifier Uponpowerup thesemaynotflashsymmetrically Thisdoesnotnecessarilyindicatethattheremaybeaproblem The muting circuit blocks the sound for three seconds after turn on and immediately after turn o...

Страница 8: ... may cause heat build up unless good access to cool air is provided at the sides of the rack If side clearance and or louvers cannot be provided some space should be provided over and under the amplifier for air circulation PILOT LIGHT AC BREAKER CLIP INDICATORS AC SWITCH MODEL 1200 1400 FRONT OCTAL SOCKETS GAIN CONTROLS XLR INPUTS 1 4 INCH INPUTS BARRIER STRIP INPUTS MONO BRIDGE SWITCH AC CORD SP...

Страница 9: ...erances Series One amplifiers are designed for safe operation at AC voltages l0 higher than rated however temperature rise and transformer hum may increase somewhat Operation on lower than normal AC voltages is not harmful to the amp but performance will be progressively lost For voltages down to 75 of rated voltage no effect other than loss of peak power should be noticed If voltage declines furt...

Страница 10: ...ut Figure 3 34b 3 Pin XLR Balanced Output Connection 3 35 Unbalanced inputs Since the input signal responds to the difference between the plus and minus signals if only a single ended unbalanced signal is available the unused input terminal must be grounded for operation without loss of gain The ability to reject cable induced hum and noise is lost but this may not be needed in well shielded envir...

Страница 11: ...nefits of a balanced line input can still be obtained Special cables will need to be made as follows Amp Input Figure 3 36 1 4 inch Quasi balanced Output Connection The cable end which connects to the power amplifier would be made as described in Section 3 34 using balanced line cable At the other end using whatever plug matches the unbalanced output connect the plus conductor to the signal termin...

Страница 12: ...the QSC Sales Department for details on availability 3 44 Octal Module Installation Peel away the protective cover and plug in the module observing correct alignment of the guide post in the middle The input bypass switches for that channel must be turned off See Section 3 5 Certain other switches may need to be set in accordance with the type of module and combination of channels desired See the ...

Страница 13: ...undly crimped These must then be screwed firmly under the binding posts Dual banana plugs are more convenient for portable systems and will normally accept at least 12 gauge wires 3 65 Cable Polarity Be sure to observe correct polarity at both the speaker and amplifier end Most present day speaker cable is color coded or polarized in some way Adopt a consistent wiring convention and stick to it We...

Страница 14: ... 1 00 2 00 67 33 14 0 050Ω 0 63 1 25 89 44 12 0 032Ω 0 40 0 80 111 56 10 0 020Ω 0 25 0 50 133 67 20 ft 18 0 252Ω 3 15 6 30 27 14 16 0 160Ω 2 00 4 00 40 20 14 0 100Ω 1 25 2 50 57 29 12 0 064Ω 0 80 1 60 77 38 10 0 040Ω 0 50 1 00 100 50 40 ft 18 0 504Ω 6 30 12 60 15 7 16 0 320Ω 4 00 8 00 22 11 14 0 200Ω 2 50 5 00 33 17 12 0 128Ω 1 60 3 20 48 24 10 0 080Ω 1 00 2 00 67 33 8 0 050Ω 0 63 1 25 89 44 80 ft...

Страница 15: ... EQ s active crossovers and mixers 3 8 PROTECTION FEATURES 3 81 Summary We have ensured that accidents mistakes and abuse will have the minimum possible chance of harming the amplifier or speaker The major challenge was to do this without impairing the audio performance into normal loads 3 82 Short Circuit Protection The active region in a power transistor is surprisingly small perhaps 1 5 of a in...

Страница 16: ... on After turn off or loss of power for any reason the amplifier will mute within a quarter of a second The outputs of all Series One power amplifiers are DC protected and the circuits have no inherent turn on or turn off thumps Protective muting for the Model 1100 is handled by a small relay at the input The signal does not pass through the relay contacts but is shunted to ground during the mutin...

Страница 17: ...dard signal level and at a standard distance from the speaker can really tell if you are getting the expected output 3 98 UNWANTED NOISES Hum in this case defined as a fairly rounded 60 cycle tone Severe hum usually is caused by broken cables or jacks with a disconnected ground shield This problem can also be caused by corroded connectors espe cially 1 4 inch types For this reason high reliability...

Страница 18: ...h as breath pops dropped microphones etc 4 3 HORN DRIVER PROTECTION The compression drivers used with horns for high frequency reproduction have special protection requirements These devices are more delicate than large cone speakers and more vulnerable to overload damage In particular the driver has a low frequency limit which must be carefully observed Below this frequency the driver diaphragm c...

Страница 19: ...cuits or at least fuses Fuses can be added which will blow in case of overloads the problem is to select a fuse with the correct time lag and overload characteristics to match the speaker limitations The speaker manufacturer is in the best position to specify these values the following table is presented for rough guidance only The fuse values shown are calculated for fast blow fuses which will ca...

Страница 20: ...arts rattle around on the inside when the amp is turned over in all directions please have it serviced immediately as a loose part could lodge in a dangerous place and cause further damage or shock hazard 5 4 OBTAINING SERVICE If the amplifier isn t working properly please consult the troubleshooting chart in Section 3 9 If proper operation cannot be restored the amplifier may require service This...

Страница 21: ...21 ...

Страница 22: ...22 A U D I O QSC is a registered trademark of QSC Audio Products Inc 1675 MacArthur Blvd Costa Mesa CA 92626 714 754 6175 FAX 714 754 6174 ...

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