Classe Audio CA-301 Service Manual Download Page 1

Page: 1 / 26

PRO-SVR_LEGACY

Page 1 of 13

Date:

July 17, 2007

Model Number:

CA-301

Classé Audio Inc.

Subject:

Service manual

Classé Audio, Inc. 5070 François Cusson Lachine, Québec Canada H8T1B3,

www.classeaudio.com

Summary of Contents for CA-301

Page 1: ...PRO SVR_LEGACY Page 1 of 13 Date July 17 2007 Model Number CA 301 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: ...e or more supply are not within 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 v...

Page 6: ... 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 look for damaged or burned components If no other components than the fuses appear to be damaged the technician can then replace the broken fuses with the same value and rating please repo...

Page 7: ...ircuits positive rail negative rail Mosfet supply No output Check connexions Check output relays Check power supply circuits positive rail negative rail Mosfet supply Check output transistors Unit turn into protection Check for smoked and or burned components Check power supply circuits positive rail negative rail Mosfet supply Check source and load Check protection circuit Check sensor wires betw...

Page 8: ...e 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 Emit...

Page 9: ...d with signal and load 6 Remove signal and load and reconnect the multimeter setted to mV scale to R8 leads Note the reading 7 Connect the multimeter to R9 R10 R11 and R12 leads Note the reading 8 Input the results into this formula 120 mVR8 mVR9 mVR10 mVR11 mVR12 5 mVR8 9 Connect the multimeter to R8 leads and adjust RV1 to match the reading to the formula result 10 Results should be around 24mV ...

Page 10: ...nted on the board Parts Description Classe part number B1DAX Complete PCB power switch B1DAXR x B01GX Complete PCB filter B01GXR x B022X Complete PCB capacitor B022XR x B023X Complete PCB control B023XR x B015X Complete PCB input B015XR x B027X Complete PCB output bottom B027XR x B B027X Complete PCB output top B027XR x T B028X Complete PCB output middle B028XR x B019X Complete PCB sensor B019XR x...

Page 11: ...3 5 On board B028X both PCBs replace D2 D4 D5 and D6 with Classe part number A205 1016 6 On board B02AX check C115 and C117 for damage and replace them if necessary with Classe part number A201 1162 7 On board B022X remove brackets and install 4 stand off Classe part number A307 1089 8 On board B023X replace PO11XR02 program with 040AR3 Classe part number and drop rail sensor voltage from 500mV to...

Page 12: ...oltage Change EXTRA PRECAUTIONS SHOULD BE TAKEN WHEN REPAIRING 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 ava...

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...

Page 14: ...B015XR06 sch 1 Tue Jul 17 11 32 18 2007 ...

Page 15: ...B019XR02 sch 1 Tue Jul 17 11 28 08 2007 ...

Page 16: ...B01GXR02 sch 1 Tue Jul 17 11 31 27 2007 ...

Page 17: ...B022XR04 sch 1 Tue Jul 17 11 30 53 2007 ...

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Page 19: ......

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Page 21: ...B027XR05_B028XR04 sch 1 Tue Jul 17 11 29 30 2007 ...

Page 22: ...B02AXR01 sch 1 Tue Jul 17 11 29 00 2007 ...

Page 23: ...B1D6XR01 sch 1 Tue Jul 17 11 30 02 2007 ...

Page 24: ...B1D8XR00 sch 1 Tue Jul 17 11 30 27 2007 ...

Page 25: ......

Page 26: ...B20BXR00 sch 1 Tue Jul 17 11 31 54 2007 ...

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