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23

Service Manual

M A R 1

Power Amplifier

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Summary of Contents for MAR1

Page 1: ...23 Service Manual MAR1 Power Amplifier...

Page 2: ...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 The exclamation point withi...

Page 3: ...needed allowing for quiet operation and reduced ambient noise in the studio l Extremely low noise and distortion suitable for quiet applications such as recording studio church and museum Precautions...

Page 4: ...eakers and damage them l Thermal protection on the heatsink If the amp overheats thermal shutdown protects the circuitry until the temperature is reduced to a safe level l Short circuit protection The...

Page 5: ...and 1 4 inputs which are commonly used for both mobile and installation set ups They provide a good combination of ease of connection and resistance to corrosion The XLR inputs are wired as per the fo...

Page 6: ...connected components Deficiencies in other components grounding will affect the sound and a serious electric fault with the amplifier could damage other components in the system For the best combinat...

Page 7: ...l for driving near field or other reference speakers For auditorium and live music use the MAR 1 has sufficient power to drive a set of small to medium size club speakers outputs outputs inputs speake...

Page 8: ...cy by splitting the audio signal into two different channels One MAR1 drives a low frequency speaker system and the other a high frequency speaker system Impact 12 Crossover High Frequency Outputs Low...

Page 9: ...ohms 1kHz 1 T H D both drive 8 ohms 1kHz 1 T H D both drive 150W 120W Input sensitivity 8 ohms 1kHz rated power 100W 0 775V Input impedance 30k ohms balanced 15k ohms unbalanced Voltage Gain 31 2 dB M...

Page 10: ...9 PC Board Layout MAR1 Input Output Power Supply Board...

Page 11: ...10 PC Board Layout MAR1 Power Amplifier Board...

Page 12: ...11 MAR1 BLOCK DIAGRAM...

Page 13: ...12 Schematic Diagram 1 MAR1 Power Amplifier Input Output MAR1 Input Output Power Supply Board...

Page 14: ...13 Schematic Diagram 2 MAR1 Power Amplifier Power Supply MAR1 Input Output Power Supply Board...

Page 15: ...14 Schematic Diagram 3 MAR1 Power Amplifier ch1 2 Power AMP MAR1 Power Amplifier Board...

Page 16: ...mm CN3B 212 10090 340 0 CONN 1 4 WAFER PLUG 9 PIN 370mm CN4A 211 10081 130 0 CONN 1 4 WAFER SOCKET 8 PIN 2532 08 CN4A 1 2 212 10080 420 0 CONN 1 4 WAFER PLUG 8 PIN 270mm CN4B 211 10091 160 0 CONN 1 4...

Page 17: ...W 150K 5 R65 000 33326 400 0 RES CF 1 4W 33K 5 R66 003 33003 601 0 RES CEMENT 5W 0 330 5 U R8 R12 000 43306 400 0 RES CF 1 16W 43K 5 R9 R14 R31 R37 R46 R60 R62 000 10306 400 0 RES CF 1 16W 10K 5 RL1 0...

Page 18: ...PS1 PS3 211 24503 000 0 CONN 1 4 SCREW TERMINAL 5 PIN PS2 211 24903 000 0 CONN 1 4 SCREW TERMINAL 9 PIN R39 000 10326 400 0 RES CF 1 4W 10K 5 R52 003 33003 600 0 RES CEMENT 5W 330 5 R52 R55 2 322 050...

Page 19: ...CONN 1 4 WAFER SOCKET 2 PIN A3963WV 2P CN103 211 10091 160 0 CONN 1 4 WAFER SOCKET 9 PIN 2532 09 D101 D102 D105 D106 D113 D115 D117 D118 090 00002 001 0 SEMI DIODE RECT 1N4002 D103 D114 090 00017 000...

Page 20: ...0 TR104 TR111 TR114 121 00006 100 0 SEMI TRANSISTOR PNP MJE350 TR105 120 00001 200 0 SEMI TRANSISTOR NPN BC550 TR107 120 00001 400 0 SEMI TRANSISTOR NPN 2N5551 TR108 120 00008 800 0 SEMI TRANSISTOR NP...

Page 21: ...8 428 355 561 60001 100 0 GIFT BOX 535 415 155 MAR1 565 60014 000 0 POLYLON 150 410 87 568 00003 000 0 BAG PLASTICS 240 340 0 05 10 PCB 15 568 30005 000 0 BAG PLASTICS 640 530 0 05 CUBOSS 2 XLR J 4 57...

Page 22: ...21 B B 631 60003 000 0 HEMECON 10 360mm C C B34 34010 230 1 MAR1 PHONIC AC 120V UL CAS...

Page 23: ...527 11000 000 0 STRAN RELIEF BUSHING 6W3 4 R 619 06380 320 0 PLA RIVET ST 3L Parts List Power Requirement Classification AC240V BS FUSE1 4 280 3E216 001 0 FUSE 3 15A 250V SSA BEL5ST3 15 FUSE1 4 280 6...

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