I bought a Crown D150A-II off Ebay so I could run it bridged with my D150A-II I've owned since new. It worked fine when I tested it but I never got around to setting up the two amps together, so I wrapped it up and set it aside. I recently got it out to hook up some new speakers (4412As) and lo and behold it had a loud hum on the right channel and then popped a fuse. I replaced the fuse and turned it back on without any input or output connected. The room lights dimmed and smoke came out of the right side as the replacement fuse blew. So I called a friend at a Crown authorized repair center where he works, but not on amps. He said he'd get their amp guy to look at it so I sent it up to him via another friend. They called back in two days and said it was ready and there was no charge. When I got it back the invoice said:
• replaced listed parts
• reflowed solder
• audio test: ok
• load test: ok
• checked bias and tensions
One hour labor at $75, and two part number MD21194 @ $12.00 each.
Total: no charge.
Bless their and my friend's little hearts but I'm still curious; what could an MD21194 be? Any ideas? My friend said he hadn't a clue.
Crown since 1974