I just fixed two of these MPS-AC supplies. No thanks to Symmetricom who considers the schematic proprietary even though they didn't invent the thing.
There are two 220uF electrolytics on the board.
#1 C14, near the 8-pin dip next to the backplane connector had leaked on both my units. You may want ...
Search found 2 matches
- Fri Apr 27, 2012 9:26 am
- Forum: Base Stations, Repeaters, General Infrastructure
- Topic: Effratom Powersupply repair
- Replies: 16
- Views: 4358
- Fri Aug 12, 2011 7:19 pm
- Forum: General Motorola Solutions & Legacy Radio Discussion
- Topic: SyntorXX lowband
- Replies: 6
- Views: 1533
Re: SyntorXX lowband
Several posts refer to solving low band sensitivity problems. Recently I have seen several
radios exhibiting sensitivities down by 6 to 10 dB. In evry case the problem was traced to
CR102 and CR103 in the pre-amplifier module. The incoming RF is switched by several
PIN diodes in the power amplifier ...
radios exhibiting sensitivities down by 6 to 10 dB. In evry case the problem was traced to
CR102 and CR103 in the pre-amplifier module. The incoming RF is switched by several
PIN diodes in the power amplifier ...