Mackie ART300A Service Manual

You must perform the following leakage test before returning any active speakers to your customer. Take every safety precaution to protect yourself while doing this test. 1. Make a small loading RC circuit as shown in the diagram below, and connect the AC volt meter between the AC power source ground and any exposed metal on the unit under test. 2. Connect the unit under test to an AC power source using a ground-lift adaptor, leaving the unit’s safety ground fl oating. Turn the unit on. 3. The meter reading should be less than 750mVAC (note: this is equivalent to 0. ...

You must perform the following leakage test before returning any active speakers to your customer. Take every safety precaution to protect yourself while doing this test. 1. Make a small loading RC circuit as shown in the diagram below, and connect the AC volt meter between the AC power source ground and any exposed metal on the unit under test. 2. Connect the unit under test to an AC power source using a ground-lift adaptor, leaving the unit’s safety ground fl oating. Turn the unit on. 3. The meter reading should be less than 750mVAC (note: this is equivalent to 0. ...

17 D22 1N4007 D30 1N4007 D31 1N4007 R67 2K2 +15V R56 2K2 2 DL3 LED D24 R54 2K2 Q17 2N5551 R57 6K8 C30 33p R59 2K2 Q16 2N5401 R55 2K2 R58 2K2 D23 2 DL4 LED 3 D26 R82 0.33 5W Q23 TIP35C 2 3 R77 Q27 BD179 2 1 R72 22 2R7 1/2W R80 2K2 1/2W R76 47 R69 1K R62 100 R68 470 D25 Q21 BC550 Q20 BC550 C26 100n R74 1K8 2 R65 560 R73 1K 3 R60 2K2 390 D29 C31 10p D28 Q19 2N5551 2 Q24 2N5401 3 3 1 R70 1K R81 0.33 5W Q26 BC560 2 2 R79 2K2 1/2W 1 3 3 1 C33 47n C29 100n R86 10 5W CF3 CF4 L2 4uH R84 10 3W F4 2.5AT -40V OUT HIGH R66 100 D32 R71 22 Q22 TIP36C 1 Q18 2N5401 2 3 R75 2R7 1/2W Q28 B ...

Introduction About this Manual This manual contains the basic repair information for the ART series loudspeakers. For each model, the following information is supplied: • Safety information • Overview • Rear panel view and features • Specifi cations and test details • Parts list, containing a master parts list and sub-assembly parts • Parts list differences between RCF and Mackie Industrial ART speakers • Schematics • PCB layout drawing It is essential that you have a copy of the user’s manual as this contains the complete operating instructions. Ser ...