On board B1D1X (both PCBs), replace R104 with Classe part number 3299X-1-202. If you need a complete PCB, please replace the (x) in the Classe part number with the revision number printed on the board.
#Classe cam 350 serial number#
If you need to order a specific part, please contact Classe Audio with the part location, PCB number, and model and serial number of the unit. It is a list of major chassis parts and PCBs.
Parts List This is not a detailed part list. Adjust trimpot R104 to get a 10mV reading. Turn on amplifier, and let it warm up for 15 minutes on idle. Turn trimpot R104 counterclockwise until it reaches 0ƻ. On positive heatsink, connect a multimeter to R111 leads and set the multimeter to mV scale. When replacing outputs transistors, the technician should first disconnect both outputs and main board to check if the blown outputs were caused by a faulty component on the amplifier’s base.Ĭalibrations and Adjustments Bias adjustment: Note: Bias adjustment should be made without any load connected to the amplifier’s output, and no signal connected to the amplifier’s input. You should check all pin combinaisons, as there is a chance that only one side of the transistor is short. DO NOT PERFORM THESE TESTS ON MOSFET DEVICES, AS THEY ARE LIKELY TO BECOME SHORT DURING THE TEST. Output Transistors Testing and Replacement PLEASE NOTE THAT THESE TESTS ARE ONLY EFFECTIVE ON BIPOLAR TRANSISTORS.
Troubleshooting Guide Symptom Unit won’t turn on Smoked and/or burned components Blown fuses No output Unit turn into protection Excessive buzz and/or hum Oscillation Intermittent signal PRO-SVR_LEGACY Possible cause Check connections Check fuses Check soft-start circuit Check relays Check power supply circuits (positive rail, negative rail, supply). In the event that one or more of these fuses would blow, the technician will first need to identify and cure the cause of failure (please report to troubleshooting guide). The CAM350 is equipped with four Mosfet protection fuses. If there is a fault, the LED will go to a FLASHING GREEN LED. When starting up normally, the CAM350 will show a FLASHING RED LED for about 15 seconds and if all is normal, the LED will go SOLID RED. Protection Modes and Indicators The front LED shows the status of the amplifier. Proceed with a post repair visual inspection. Once this step is done, follow these steps, known as the start-up procedure, to ensure that everything in the unit is in working condition. Using the troubleshooting guide, find the problem and proceed to the repair. Do not connect the unit without analysing the symptoms reported by the customer and the results of the inspection. Start Up Procedure When receiving a unit, an assiduous visual inspection must be performed. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.īlock diagrams PRO-SVR_LEGACY of 13
#Classe cam 350 manual#
Introduction Please read this manual carefully before commencing servicing! Only qualified and authorized personnel should attempt to service this product.
Table of Contents Introduction 3 Important Notes on Servicing 3 Ordering Replacement Parts 3 Block Diagrams 4 Start up Procedure 5 Protection Modes and Indicators 6 Troubleshooting Guide 7 Output Transistors Testing and Replacement 8 Calibrations and Adjustments 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 5070 François Cusson Lachine, Québec Canada H8T1B3, Date: AugModel Number: CAM-350 Subject: Service manual Classé Audio, Inc.
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