Crest_Audio_Pro_II_Series_Owners_Manual电路图.pdf

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1、owners manual Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652 USA TEL: 201.909.8700 FAX: 201.909.8744 *A4400076* v. 1.0 4/29/98 Ch ACh B -80 -30 -15 -10 -6 -3 -1 dB -80 -30 -15 -10 -6 -3 -1 dB 8002Professional Power Amplifier Status Signal ACL 8002 power amplifier RadioFans.CN 收音机爱 好者资料库 1 Sav

2、e the carton and packing materials! Should you ever need to ship the unit, use only the original factory packing. For replacement packaging,call Crest Audios Customer Service Department directly. 2 Read all documentation before operating your equipment. Retain all documentation for future reference.

3、 3 Follow all instructions printed on unit chassis for proper operation. 4 Never hold a power switch in the on-position, if it wont stay there by itself! 5 Do not use the unit if the electrical power cord is frayed or broken. The power supply cords should be routed so that they are not likely to be

4、walked on or pinched by items placed upon or against them. 6 Always operate the unit with the AC ground wire connected to the electrical system ground.Precautions should be taken so that the means of grounding of a piece of equipment is not defeated. 7 Damage caused by connection to improper AC volt

5、age is not covered by any warranty.Mains voltage must be correct and the same as that printed on the rear of the unit. 8 Do not ground any hot (red)terminal. Never connect a hot (red)output to ground or to another hot (red)output! 9 Power down and disconnect units from mains voltage before making co

6、nnections. 0 Do not drive the inputs with a sig- nal level greater than that required to enable equipment to reach full output. Do not run the output of any ampli- fier channel back into another channels input. Do not parallel- or series-connect an amplifier output with any other amplifier output. C

7、rest Audio is not responsible for damage to loudspeakers for any reason. Do not connect the inputs or out- puts of amplifiers to any other voltage source: such as a battery, mains source, or power supply, regard- less of whether the amplifier is turned on or off. Connecting amplifier outputs to osci

8、lloscopes or other test equip- ment while the amplifier is in bridged mono mode may damage both the amplifier and test equipment! Do not spill water or other liquids into or on the unit,or operate the unit while standing in liquid. Do not block fan intake or exhaust ports. Do not operate equipment o

9、n a surface or in an environment which may impede the normal flow of air around the unit: such as a bed, rug, weathersheet, carpet, or completely enclosed rack. If the unit is used in an extremely dusty or smoky environment: the unit should be periodically “blown free” of foreign matter. Do not use

10、the unit near stoves, heat registers, radiators, or other heat producing devices. The power cord of equipment should be unplugged from the out- let when left unused for a long peri- od of time. Service Information Do not remove the cover! Removing the cover will expose you to potentially dangerous v

11、oltages.There are no user serviceable parts inside. Equipment should be serviced by qualified service personnel when: A.The power supply cord or the plug has been damaged. B.The equipment has been exposed to rain. C.The equipment does not appear to oper- ate normally,or exhibits a marked change in p

12、erformance. D.The equipment has been dropped, or the enclosure damaged. To obtain service: contact your nearest Crest Audio Service Center, Distributor, Dealer, or Crest Audio at 201.909.8700USA or visit for addi- tional information. This symbol is used to alert the operator to follow important proc

13、edures and precautions detailed in documentation. This symbol is used to warn operators that uninsulated “dangerous voltages” are present within the equipment enclosure that may pose a risk of electric shock. important precautions RadioFans.CN 收音机爱 好者资料库 p.1 table of contents 1 2 3 4 5 6 7 how to us

14、e this manual p.2 introduction p.3 installation p.5 unpacking mounting cooling and ventilation powering maintenance features overview p.11 front panel rear panel operation modes p.17 stereo parallel bridged connections p.21 input output safety p.27 tourclass protection precautions user responsibilit

15、y service and support p.33 support contact us registration specifications p.36 block diagram p.37 wire gauge charts p.38 a b c contents appendixes RadioFans.CN 收音机爱 好者资料库 p.2 Pro II owners manual how to use this manual1 conventions terms official Crest Audio features and each indicator or control on

16、 the amplifier will appear as:terms actions specific actions or selections the user can execute will appear as:actions tasks are broken down into steps1 2 3 warnings indicators tips see seerefers to other sections of the manual containing supplementary information on the current topic or a related i

17、ssue note notesupplimentary feature information Prefered methods. Helpful hints. Feature insights. + Procedures not to attempt. Issues or hazards to keep in mind when operating the equipment. a What to look for on the equipment display. Alerts, indicators, or prompts that may appear. p.3 introductio

18、n1 welcome Congratulations on your purchase of a new Pro II Series professional power amplifier,and thank you for your confidence in Crest Audio prod- ucts.You are among the growing number of audio professionals who have made Crest Audio one of the worlds leading suppliers of professional and commer

19、cial/industrial audio systems. For your safety, please read the Important Precautions section before installing and operating the amplifier.The Crest Audio Pro II Series is based on the same advanced circuit topologies that have made Crests original Professional Series amplifiers the choice of touri

20、ng professionals world- wide.Pro II Series amplifiers are designed for high operating efficiency and accurate sonic performance across the full audio bandwidth,even under stressful conditions. The Pro II Series heralds a major advance in amplifier design from Crest Audio, providing the extreme relia

21、bility and hallmark sonic accuracy for which Crest products are famous,in a rugged package but at only half the weight of previous models of similar power.These dramatic weight savings are made possible by PowerLok, a radical new power-supply technology that provides significant performance and flex

22、ibility advances over conven- tional designs.PowerLok is Crest Audios unique implementation of Power Factor Correction, which allows current to be drawn throughout the entire cycle of the AC line-frequency, providing maximum output power, while drawing significantly smaller peak currents from the AC

23、 line. Compared with an amplifier using a conventional power-supply,PowerLok requires less peak power to produce identical output power,and because PowerLoks current peaks are smaller,a Pro II amplifier can be serviced by a lower-rated breaker than a conventional amplifier of similar wattage.See sep

24、arate literature for full details on the benefits of PowerLok technology. In order to maintain strict quality assurance standards, all Crest Audio power amplifiers are built in our state-of-the-art USA manufacturing facili- ty.Internal components are the finest available and key sub-assemblies are p

25、re-tested before final assembly. Each amplifier is “burned in” and thor- oughly tested (using precision audio test equipment)before shipping. In addition,all Pro II Series amplifiers incorporate Crests exclusive TourClass protection features to safeguard both internal circuitry and connected loudspe

26、akers. This proven combination of advanced design, quality construction, and comprehensive circuit protection is your guarantee of fail-safe reliability. You can depend on consistent,stable performance even when your Pro II Series amplifier is subjected to punishing extremes in the most demanding fi

27、xed or mobile sound reinforcement applications. p.4 p.5 installation2 unpacking mounting cooling and ventilation powering maintenance / what to do with the shipping carton / proper rack-mounting technique / keeping the amplifier cooled / grounding the amplifier / required AC line voltages / routine

28、maintenance practices Pro II owners manual p.6 installation2 unpacking Please inspect the amplifier carefully immediately after unpacking.If you find any damage, notify your supplier/dealer immediately. Only the shipper may file a damage claim with the carrier for damage incurred during shipping.Be

29、sure to save the carton and all packing materials for the carriers inspection. If the packing materials are in good condition, please save them. If you ever need to ship the unit back to Crest Audio or an authorized ser- vice center,you should use only the original factory packing. For replacement p

30、ack- aging, call Crest Audios Customer Service Department directly. seeservice and support + p.7 installation2 mounting All Pro II Series amplifiers mount in standard 19-inch racks.Four front-panel mounting holes are provided on each amplifier.Rear mounting ears give addi- tional support,and use of

31、rear supports is highly recommended in all mobile and touring sound systems.Handles are fitted standard. Ch ACh B -80 -30 -15 -10 -6 -3 -1 dB -80 -30 -15 -10 -6 -3 -1 dB 8002Professional Power Amplifier Status Signal ACL front height 5.25/ 133mm front width 19/483mm 8002 shown 8002 shown 35mm rear w

32、idth 17/432mm (19”/483mm to rack ears)depth 18/457mm rear height 5.25/ 133mm Pro II owners manual p.8 installation2 To ensure optimum cooling of the amplifier, periodically clean its fan filters. These are removable without tools. Make certain that there is enough space around the front of the ampli

33、fier to allow the heated air to escape. If the amplifier is rack-mounted, do not use doors or covers on the front of the rack; the exhaust air must not be impeded In racks with closed backs: for every four amplifiers, allow at least one standard- rack-space opening in the front of the rack. a coolin

34、g and ventilation Pro II Series amplifiers use a twin-tunnel forced-air cooling system to main- tain a low,even operating temperature. Drawn in by dual 105 CFM (cubic feet-per-minute)DC fans on the rear panel, air flows through the cooling fins of the channel heat-sinks,dissipating power transistor

35、heatthen exhausts through the front panel slots. Heat sink temperature-sensing circuits control the “intelligent” variable- speed fans.Fan speed increases only as required by heat-sink temperatures keeping fan noise to a minimum. Under extreme thermal load,the fans will force a very large volume of

36、air through the heat sinks. If either heat-sink surpasses the maximum allowed temperature,the sensing circuit will open the output relay,disconnecting the load from that channel. If the power supply overheats, another sensing circuit opens both channel output relays,until it has cooled to a safe tem

37、perature. p.9 installation2 powering Unless otherwise specified when ordered,Pro II amplifiers shipped to cus- tomers are configured as follows: North America 90255 VAC 5060Hz Europe 180255 VAC 5060Hz Asia 180255 VAC 5060Hz Australasia180255 VAC 5060Hz South America 90255 VAC 5060Hz Japan 90255 VAC

38、5060Hz maintenance A Pro II Series amplifier requires no routine maintenance other than the occasional cleaning or replacement of the fan intake filters on the rear of the amplifier.(This operation does not require any tools.)Filters must be kept clear and clean to ensure proper ventilation through

39、the unit. If the amplifier is used in an extremely dusty or smoky environment,the fil- ter should be cleaned or changed frequently and the unit should be period- ically “blown free” (using compressed air)of any foreign matter that may have penetrated the filter. Users will not need to make any inter

40、nal adjustments to the amplifier dur- ing its lifetime. There are no user-serviceable parts or adjustments that require opening the power amplifier. Always turn off and dis- connect the amplifier from mains voltage before mak- ing audio connections. As an extra precaution, have the attenuators turne

41、d down during power-up. a Cover removal exposes the risk of shock, so refer all servicing to qualified service technicians autho- rized by Crest Audio. a p.10 p.11 features overview3 front panel rear panel / location of connectors and controls / legend of panel symbols Pro II owners manual p.12 feat

42、ures overview3 Ch ACh B -80 -30 -15 -10 -6 -3 -1 dB -80 -30 -15 -10 -6 -3 -1 dB 8002Professional Power Amplifier Status Signal ACL 8002 shown 12384756 p.13 features overview3 front panel 1Rack Mounting Ears Two front-panel mounting holes are provided on each mounting ear. 2Rack Handles 3Fan Outlet G

43、rills Pro II Series amplifiers are cooled by two,rear-mounted fans.Cool air flows over the heat sinks and exhausts through the front grills.Make sure these outlets remain clear to allow unrestricted airflow. 4Signal LED A variable-intensity LED that illuminates to indicate that a signal (above a min

44、imum threshold)is present at the amplifier input,and that the sig- nal is being amplified. 5Input Attenuators Two input attenuators adjust level for their respective amplifier chan- nels.In Bridged Mono mode,the channel A attenuator controls signal level. 6Status LED A bi-color LED.When green,it ind

45、icates that AC power is connected and the amplifier is turned on.When red,the channel is in Protect mode (speakers disconnected by output relay). 7ACL LED Illuminates at the clipping threshold.Continuous illumination also indi- cates that ACL ACTIVE CLIP LIMITINGprotection circuitry is engaged. 8AC

46、Power Switch/Circuit Breaker Pro II Series amplifiers have a front-panel combination AC switch/cir- cuit breaker.(No fuses are used.)If the switch shuts off during normal use,push it back to the on-positiononce.If it will not stay on,the ampli- fier needs servicing. noteall LEDs are one per channel

47、Never try to hold the circuit breaker/power switch in the on-position, if it wont stay there itself! a Pro II owners manual p.14 features overview3 rear panel 1Output Connectors Pro II Series power amplifiers are supplied with both high-current five- way binding posts and Speakons installed. Binding

48、 posts: one pair per channel. Speakons: one connector per channel, plus a third connector configured for bridged-mono operation. Connection to the binding posts can be made with bare wire or spade lug terminations.Make connections to both the channelA and channel B terminals for Stereo or Parallel m

49、ode,or a single connection across the red (hot)terminals only of channels A and B for Bridged Mono mode. Using cables terminated with Speakon connectors, attach to both the channel A and channel B connectors for Stereo or Parallel mode,or to the Bridged mode connector/s for Bridged Mono mode. seeoperation modes 2Mode Selection Switch This recessed,three-position switch configures the amplifier for Stereo, Parallel or Bridged Mono mode operation. Amplifiers are factory-config- ured for Stereo mode. seeoperation modes Do not adjust the mode selec