Chris, You say your Motorola shop "soldered across the trace"... I guess I need to know HOW they did this. We have an MSR2000 UHF machine, and our PA has failed twice in about 6 months also. The local tech tried to do the "I'll solder across the trace" fix, and it also failed. To have the PA repaired properly, we sent it to the Motorola shop (Chicago Communications). They have a "hot air" solder system, which is apparently needed for this type of repair. I'm told the failure was on a board that has a ceramic substrate, and if not repaired PROPERLY, it will continue to fail, as ours did. Improper heating and/or pressure during repair can >>crack the substrate<< and ruin the circuit board.
I just got the PA back, and haven't even had a chance to get it back on the air yet; nor do I know what this repair has cost us. Just something you might want to look into. Mark - N9WYS -----Original Message----- From: Chris Peterson [mailto:[EMAIL PROTECTED] Sent: Monday, June 07, 2004 8:29 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] MSR-2000 parts/repair needed All, Our local EOC has an MSR-2000 repeater, converted to 146.745- Mhz. It has always had a flaky PA. The local Motorola shop says there is a crack in the board that broke a trace. This has failed about every 6 months and the Motorola shop has simply soldered across the trace and temperarily solved the problem. Now, though, we're having a different problem. When it gets hot, the repeater TX drops out completely, sometimes for a couple minutes. This, to me, sounds like an exciter problem, or possibly a bad connection between the exciter and PA, but the Motorola shop has tried to blame the RC-850 that is connected to the repeater. We've disconnected the RC-850 and still have the problem using the internal controller, so we believe we've mostly ruled out the modification as being the problem. I'm looking for replacement PAs, exciters, or any other MSR-2000 parts. I'd also be interested to know if any other Motorola parts will directly drop in. I.E. Mitrek parts? It's storm season now, so we'd like to get the repeater functioning properly as soon as possible. Thanks and 73, Chris Peterson, KG0BP Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
