QSC-KSeries-spk-sm 维修电路原理图.pdf

Product Model: K8, K10, K12, KSubDocument #: TD-000487-00Initial Release: February 2015Revised Release: Revision: AService ManualQSC Audio Products, LLC Costa Mesa, California, USA K SeriesDownloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库2QSC Audio Products, LLCDownloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库3TD-000487-00 K Series Service ManualTable of Contents1. Introduction .51.1 Restriction of Hazardous Substances Directive (RoHS) .51.2 Revision history .51.3 Service bulletins .51.4 Serial Numbers .51.5 The well-equipped service bench .62. Product specification and images .73. Firmware .83.1 Firmware revisions and program numbers .83.2 Firmware programming instructions .94. Operational description .114.1 Series description .114.2 Top-Box Models .114.3 KSub .124.4 Bucket of power (BOP) amplifier module.125. Top-box disassembly instructions .155.1 Bucket of power .155.2 Front grille .165.3 Front baffle .165.4 High frequency transducer.175.5 Low frequency transducer .185.6 Handles, feet, and pole mount .186. KSub disassembly and repair procedures .206.1 Bucket of power .206.2 Low frequency transducers .206.3 Handles, threaded pole mount, and casters.217. BOP disassembly and repair procedures.237.1 Faceplate .237.2 PSU/amplifier board .247.3 Input/DSP board.257.4 Power inlet, power switch, and fan .258. Testing .268.1 Requirements .268.2 Bucket of power testing .268.3 Loudspeaker testing .299. Troubleshooting guide.319.1 General tips and tricks.319.2 Line filter - broken components (BOP) .339.3 Broken capacitor C45 (BOP) .349.4 Input op-amp damage (BOP) .349.5 Amplifier section, MOSFET failure (BOP) .359.6 Power supply, MOSFET failure (BOP) .369.7 Fan behavior.379.8 Internal wiring harness .379.9 Front LED .389.10 Transducer issues .399.11 Broken baffle .4010. Service updates .4110.1 Inductor reinforcement, L13 .4110.2 XLR combo jacks with locking tabs .4111. Schematics and PCB images .4211.1 Schematic with notes (all models) .4211.2 PCB image with notes (all models) .4612. Component identification .4812.1 Top-box assembly components .4812.2 KSub assembly components .4912.3 BOP components .50Downloaded from www.M manuals search engine 4QSC Audio Products, LLCQSC Audio Products, LLC Technical Services Group 1665 MacArthur Blvd. Costa Mesa CA 92626 USAK Series Powered Loudspeakers Service ManualCopyright 2014 by QSC Audio Products, LLC. All Rights Reserved. QSC and the QSC logo are trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark Office and other coun-tries. Patents may apply or be pending. Windows is a registered trademark of Microsoft Corp. Audio Precision is a registered trademark of Audio Precision, Inc. All other trademarks are property of their respective owners.+1 (714) 957-7150 1-800 QSC AUDIO (USA only) +1 (714) 754-6173 (fax) (main web site) (Technical Service Group web site) (parts and accessories sales)13. Exploded view drawings .5213.1 K8 exploded view .5213.2 K10 exploded view .5313.3 K12 exploded view .5413.4 KSub exploded view .5614. Replacement parts .5714.1 FG-003300-01 (120V) or FG-003320-01 (230V), K8 .5714.2 WP-003300-01, K8 speaker assembly .5714.3 FG-003302-01 (120V) or FG-003322-01 (230V), K10 .5814.4 WP-003302-01, K10 speaker assembly .5814.5 FG-003304-01 (120V) or FG-003324-01 (230V), K12 .5914.6 WP-003304-01, K12 speaker assembly .6014.7 WP-00330 x-00, BOP module assembly (K8, K10, K12 only) .6114.8 WP-00331x-00, BOP PCB assembly (K8, K10, K12 only) .6114.9 FG-003306-01 (120V) or FG-003326-01 (230V), KSub .6414.10 WP-003306-01, KSub speaker assembly .6514.11 WP-003310-00, KSub BOP module assembly .6514.12 WP-003314-00, KSub BOP PCB assembly .66Downloaded from www.M manuals search engine 5TD-000487-00 K Series Service Manual1. Introduction1.1 Restriction of Hazardous Substances Directive (RoHS) QSC K Series loudspeaker products are manufactured to conform to the European Unions RoHS Directive, which reduces the amount of hazardous substances allowed in products for sale within its member nations. In electronic equipment such as audio processors, this applies primarily to certain toxic heavy metals, such as lead, which may be present in electronic components, solder, and other parts.RoHS-compliant materialsWhen servicing RoHS-compliant electronic products, it is important for the service technician to use only RoHS-compliant components and solder (lead-free). All replacement parts provided by QSC for RoHS-compliant products are certified as RoHS compliant.RoHS-compliant toolsSoldering irons and desoldering apparatus used on RoHS-compliant products must also not be contaminated by hazardous substances, such as lead. Therefore, you cannot use the same soldering and desoldering tools for RoHS-compliant products and solder as you do for non-compliant products and solder. You must either use separate soldering irons, desoldering tools and braid, etc., or at the very least designate separate tips and braids and use only the appropriate ones. If you contami-nate a tip or braid, even inadvertently, by using it on a non-compliant product or solder, you should no longer use it with RoHS-compliant products or solder.1.2 Revision historyNo revision history yet.1.3 Service bulletinsAt the publish date of this service manual, two service bulletins concerning the K Series loudspeakers have been issued. Check or contact QSC Technical Services Group (TSG) for the latest information on applicable service documents. For a quick summary, refer to “10. Service updates” on page 41. 1.4 Serial NumbersSerial numbers on QSC K Series loudspeakers are nine digits long. The second digit represents the month of manufacture, and the third digit represents the year; use the decoder chart on the right to find the manufacture date. (The first digit is an individual factory code, and the fourth through ninth digits are the sequential identifying number for each individual speaker.) For example, a serial number of GJCxxxxxx would indicate that the speaker was built on 10/12, or October 2012.The speakers serial number can be found on a label on the amplifier modules face plate.MODEL:KW122,BLK100240 V 2.31.1 A 50/60HZQSC AUDIO PRODUCTS, LLCCOSTA MESA, CA. USAMADE IN CHINAGJC669897YearMonthGX X 5xxxxxMonth YearA = JanB = FebC = MarD = AprE = MayF = JunG = JulH = AugI = SepJ = OctK = NovL = Dec9 = 2009A = 2010B = 2011C = 2012D = 2013E = 2014F = 2015G = 2016Downloaded from www.M manuals search engine 6QSC Audio Products, LLC1.5 The well-equipped service benchHardware and Software Personal computer (PC) running Windows 7 or newer operating system with available USB2.0 or newer port Total Phase Aardvark I2C host adapter (for programming) Digital multimeter (DMM) Oscilloscope Audio sine wave generator 8ohm resistive load, capable of 500 W power handling SPL meter Soldering iron K Family test adapter Distortion analyzer (Audio Precision recommended) Class D output filter for distortion analyzerTools required Electronic screwdriver Various hand tools for electronic repair, including Phillips screwdrivers, needle-nose pliers, etc. 2.5x or higher magnifier with lamp ROHS-compliant (lead-free) soldering iron RoHS-compliant electronic solder ROHS-compliant desoldering equipment or desoldering braidDownloaded from www.M manuals search engine 7TD-000487-00 K Series Service Manual2. Product specification and images1 For comparison purposes and in accordance with common industry practice, maximum peak SPL specifications are theoretical calculations based upon transducer sensitivity and peak available amplifier power. 2 Independent of limiters and driver protection circuits.Specifications subject to change without notice.K SeriesSpecificationsK8K10K12KSubConfigurationTrapezoidal 2-wayMultipurpose 2-wayMultipurpose 2-way4th Order BandpassTransducers Low-frequency High-frequency8 cone transducer1.75 diaphragm compression driver10 cone transducer1.75 diaphragm compression driver12 cone transducer1.75 diaphragm compression driver2 x 12 cone transducersFrequency Response (-6 dB)66 Hz 18 kHz60 Hz 18 kHz52 Hz 18 kHz48 Hz 134 HzFrequency Range (-10 dB)61 Hz 20 kHz56 Hz 20 kHz48 Hz 20 kHz44 Hz 148 HzNominal Coverage (-6 dB)105 conical90 conical75 conicalMaximum SPL 1127 dB peak129 dB peak131 dB peak130 dB peakAmplifiers Power Output 21000 W continuous Class D (500 W LF, 500 W HF), 2000 W peak1000 W continuous Class D (2 x 500 W), 2000 W peak Input Impedance ()XLR/:40kbalanced/20kunbalancedXLR/MICmode:2260balancedRCA:10k ControlsPowerGainAGainBMic/LineLFMode(ExtSub/Norm/DEEP)HFMode(Flat/VocalBoost) FrontLED(On/Off/Limit)PowerGainLFMode(Normal/DEEP)Polarity(Normal/Reverse)FrontLED(On/Off/Limit) IndicatorsPowerSignalASignalBStandbyLimitMicPowerSignalStandbyLimit ConnectorsBalancedfemaleXLR/line/miclevelinputBalancedfemaleXLR/linelevelinputDualBalancedmaleXLRfullrangelineleveloutBalancedmaleXLR“mix”outStereoRCAlinelevelinputRemotegaincontrolLockingIECpowerconnectorDual balanced female XLR / line levelinputDualBalancedmale XLRfullrangelineleveloutRemotegaincontrolLockingIECpower connector CoolingOn demand, 50 mm variable speed fan Amplifier ProtectionThermallimitingOutputovercurrentOvertemperaturemutingGuardRail Transducer ProtectionThermallimitingExcursionlimiting AC Power InputUniversalpowersupply100240VAC,5060Hz AC Power Consumption 1/8 Power100VAC,2.3A120VAC,2.01A230VAC,1.13AEnclosureImpact resistant ABSPainted birch plywood FinishBlack PaintBlack textured paintGrille Black powder coated 18 gauge steel Dimensions (HWD)17.7 x 11 x 10.6450 mm x 280 mm x 269 mm20.4 x 12.6 x 11.8519 mm x 320 mm x 300 mm23.7 x 14 x 14603 mm x 356 mm x 356 mm26 x 14 x 28.1 (including casters)665 mm x 356 mm x 714 mmWeight (Net)27 lb (12.2 kg)32 lb (14.5 kg)41 lb (18.6 kg)74 lb (33.6 kg)Available AccessoriesK8TOTEK8YOKE KSERIESM10KITK10TOTEK10YOKE KSERIESM10KITK12TOTEK12YOKE KSERIESM10KITKSubCOVERDownloaded from www.M manuals search engine 8QSC Audio Products, LLC3. FirmwareVery infrequent DSP firmware updates have occured to K Series loudspeakers during production. While firmware can be up-dated from the programming header using an Aardvark I2C programmer, its not recommended and almost never needed to perform updates on the DSP firmware after a repair. What is more important is understanding the behavior of the particular DSP firmware revision that is loaded in the speaker being serviced. Use the table below to see all firmware changes. 3.1 Firmware revisions and program numbersCurrent firmware revision at the publication of this service manual (January 2015) is: revison FRevisionEffective DateS/N rangeDescription of changesAMarch 11, 2009GC9xxxxxx onlyProduction releaseBMarch 25, 2009GD9xxxxxx GE9xxxxxxIncreased mute turn-on time to avoid signal passing through when the system powers off with certain AC input situationsCApril 21, 2009GF9xxxxxx GAAxxxxxxIncreased the fan turn-on voltage because some fans wouldnt come on with lower voltageDJanuary 28, 2010GBAxxxxxx GLAxxxxxxAdjusted fan thresholds to accommodate hardware chang-es and modified limiters based on amplifier updates. The fan no longer spins until its absolutely needed.FDecember 16, 2011GABxxxxxx and newerTest mode changes only to shorten burn-in times. The firmware revision for K-Series loudspeakers is printed on a small label near the channel A gain pot. Remove the chA gain knob to locate the DSP firmware revision that the amplifier was originally manufacutred and programmed with. K8K10K12KSubQSC PG- numberPG-000210-00PG-000211-00PG-000212-00PG-000213-00Same DSP board for K8, K10, and K12 - different firmwareK8, K10, and K12 models have exactly the same DSP board. There is no physical difference between the boards and the components stuffed on the PCB. The only difference between them is the firmware code that is programmed into the DSP. This means that you can program a DSP/input board that was originally programmed as a K8 into a K10, K12, or vice-versa. The KSub DSP/input board is the exception to this rule since less components are stuffed on the PCB. Please note the PG- numbers in the table above for the correct firmware files. Important Note: Due to component changes between board revisions, it is not recommended to upload a different firmware revision than the revision that is printed on the small label on the DSP board. The firmware will upload into the DSP fine, but temperature sensing, limiting, speaker voicing, and fan speed may behave strangely due to the component changes between board revisions.Downloaded from www.M manuals search engine 9TD-000487-00 K Series Service Manual3.2 Firmware programming instructionsWarningIf the instructions are not followed carefully, there is a possibility that the amplifier inside the loudspeaker will stop work-ing. Because House of K loudspeakers use DSP technology, all audio signals are routed through the DSP controller. If the firmware is not programmed into the DSP controller correctly, then the amplifier will fail to pass audio. While performing a firmware update, never plug the ribbon cable into the programming header with the amplifier turned on.Equipment neededTotal Phase Aardvark I2C Host Adapter, TP240141Ribbon cable adapter, 6 pin to 10 pin (not needed for some older K models)USB cable, A-type to B-type (included with Aardvark)Computer with Windows XP, Vista, or 7 operating system (32 bit or 64 bit okay)Software neededTotal Phase USB driver setup file: TotalPhaseUSB-v2.10.exeK Programmer Utility (32 bit or 64 bit)HEX file which contains specific loudspeaker firmwareInstalling the Total Phase Aardvark USB DriversThis step must be performed before any programming takes place. The installation file for the USB drivers will work on Windows XP, Vista, 7 (32 bit and 64 bit), and 8. 1. Disconnect the Aardvark if youve already connected it.2. Open the installer file named TotalPhaseUSB-v2.10.exe.Important Note: There is a known bug in the installer that affects Windows Vista only. You must run the installer in a different mode. Right-click on the install file Total-PhaseUSB-v2.10.exe and click on Properties. Click the Compatibility tab and mark the box titled “Run Compatibility mode for Windows XP (Service Pack 3)”. Click OK to save the changes. 3. Mark the box titled “Install USB Drivers” and continue with the installation utility until complete.4. Connect the Aardvark to the computer with the USB cable.5. The Total Phase USB drivers will install automatically. You may skip any Windows Update notification as you do not want Windows to look for USB drivers via the Internet. Windows will let you know that the drivers installed correctly with a pop-up window.Note: If you want to check that the USB drivers installed correctly, go to the Device Manager under the Control Panel menu and look for “Total Phase Aardvark I2C/SPI Host Adapter” under Universal Serial Bus controllers.Downloaded from www.M manuals search engine 10QSC Audio Products, LLCProgramming a House of K LoudspeakerIn order to program the loudspe