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Classe Audio CAV-180, Service Manual

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Classe Audio CAV-180 Service Manual Download Page 20

B2E4XR00.sch-1 - Tue Jul 17 12:02:42 2007

Summary of Contents for CAV-180

Page 1: ...PRO SVR_LEGACY Page 1 of 13 Date July 17 2007 Model Number CAV 180 Classé Audio Inc Subject Service manual Classé Audio Inc 5070 François Cusson Lachine Québec Canada H8T1B3 www classeaudio com ...

Page 2: ...ustments 9 Parts List 10 Updates 11 Fuses 12 Voltage Change 12 IR Interface Information 13 Schematics 14 The contents of this document as well as the files associated with it contain confidential information that is proprietary to Classé Audio Incorporated and are intended solely for the purpose of servicing product No part of its contents may be used copied disclosed or conveyed to any party in a...

Page 3: ...t parts please contact your nearest service center always quoting the unit serial number North America Phone 978 664 2870 E mail classe bwgroupusa com Europe Phone 44 0 1903 221 700 E mail classe bwgroup com Asia Phone 852 2790 8903 E mail classe bwgroup hk Rest of the World Phone 514 636 6384 E mail cservice classeaudio com Important Notes on Servicing 1 ALWAYS observe ESD precautions when handli...

Page 4: ...PRO SVR_LEGACY Page 4 of 13 Block diagrams ...

Page 5: ...ithin specifications return to the troubleshooting guide 7 Slowly raise voltage until you hear relays click this point is around 55Vac Recheck every supply 8 If one or more supply are not within specifications return to the troubleshooting guide 9 Raise voltage to 120Vac Recheck every supply 10 If every supply is within specifications unplug the unit and bypass from the variable transformer Reconn...

Page 6: ...LID RED If there is a fault the LED will go to a FLASHING GREEN LED The CAV180 is not equipped with any protection fuses In the event that the protection is triggered the technician will first need to identify and cure the cause of failure please report to troubleshooting guide When the cause has been identified disconnect the unit from the system including the AC power Remove the top cover and lo...

Page 7: ...ail negative rail No output Check connexions Check output relays Check power supply circuits positive rail negative rail Check output transistors Unit turn into protection Check for smoked and or burned components Check power supply circuits positive rail negative rail Check source and load Check protection circuit Check sensor wires between sensor PCB and control PCB Check outputs transistors and...

Page 8: ...ase Blown output transistors should be replaced by kits not individually These kits contains matched transistors for both rails of one channel When replacing blown output transistors you must also replace positive and negative Mosfet drivers and bias transistor Carefully inspect 4 7ƻ resistor and 10ƻ soft start resistor and replace if necessary Replace any burnt component or board Pins 1 Base 2 Co...

Page 9: ...it warm up for 15 minutes on idle 4 Adjust trimpot RV1 to get a 10mV reading 5 Let the amplifier warm up for a 24 hours period with signal and load 6 Remove signal and load and reconnect the multimeter setted to mV scale to R5 leads Note the reading and readjust if necessary DC offset Note DC offset adjustment should be made without any load connected to the amplifier s output and no signal connec...

Page 10: ...art number with the revision number printed on the board Parts Description Classe part number B1D9X Complete PCB negative sensor B1D9XR x B1DBX Complete PCB positive sensor B1DBXR x B02AX Complete PCB amplifier B02AXR x B2E1X Complete PCB capacitors B2E1XR x B2E2X Complete PCB heatsink B2E2XR x B2E3X Complete PCB speaker terminal B2E3XR x B2E4X Complete PCB soft start B2E4XR x B2E5X Complete PCB i...

Page 11: ...e and connect it to position GND7 on B2E3X PCB 4 On board B2E2X 5 PCBs make sure that Q1 and Q2 are part number 2SK79 and 2SK216 They should be mounted on a small aluminium block which is mounted to the chassis see following pics If they are printed as ECX10N20 and ECX10P20 replace them using the following guide Parts needed G213 1029 Mosfet x5 G213 1031 Mosfet x5 G307 1078 Silpad x10 385 288 Scre...

Page 12: ...PAIRING MODIFYING OR TROUBLESHOOTING IN THE POWER SUPPLY AREA UNIT MUST BE DISCONNECT FROM MAIN SOURCE AND CAPACITORS MUST BE DISCHARGED USING A 100W INCANDESCENT BULB 1 Set the primary wires of the main transformer as described below 2 Replace the varistor according to new line voltage following Classe s recommendations If varistor is not available remove old varistor and leave it empty 3 Set the...

Page 13: ... 3 Turns on Amplifier 6 J3 J2 J1 J0 ADDRESS RC Button Auto ON Note X X X X 0 Amp1 No QC setting X X X Out 1 Amp2 No X X Out X 2 Amp3 No X X Out Out 3 Amp4 No X Out X X 4 Amp5 No X Out X Out 5 Amp6 No X Out Out X 0 Amp1 No X Out Ot Out 0 Amp1 Yes On with AC Out X X X 0 DC No Out X X Out 1 DC No Out X Out X 2 DC No Out X Out Out 3 DC No Out Out X X 4 DC No Out Out X Out 5 DC No Out Out Out X 0 DC No...

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