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| Music Electronics General discussion about music electronics |
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10-08-2007, 08:03 PM
| #1 |
| Member Join Date: Aug 2007 Location: Richmond, VA
Posts: 73
| Mackie SRS1500
There are 4 green LEDs on the output PCB. When this amp is working are they all lit, all off, half lit? I asked Mackie and they weren't sure. Go figure.
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10-09-2007, 01:35 AM
| #2 |
| Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA
Posts: 10,352
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Does the amp work? Both channels? SOme LEDs are not for indicating, they are there for the voltage drop. What if there were no LEDs? How would you proceed then? DO it that way now.
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10-09-2007, 02:57 PM
| #3 |
| Member Join Date: Aug 2007 Location: Richmond, VA
Posts: 73
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This is a mono amp. I have 2 of them. One with +65vdc on output. the other with -65vdc on the output. Both have LED lit in this pattern lit-off-off-lit. Was just wondering if someone knew answer, b4 I start troubleshooting.
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11-28-2007, 09:56 PM
| #4 |
| Member Join Date: Aug 2007 Location: Richmond, VA
Posts: 73
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D36 on D14 Blinks with music D32 off D26 off D24 on D12 Blinks with music |
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12-07-2007, 05:49 PM
| #5 |
| Member Join Date: Aug 2007 Location: Richmond, VA
Posts: 73
| You are the weakest link
Q27 2SA1478 seems to be the weak link. It was shorted in both amps.
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