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Hi,
My 940 was working good for while, but now the S-Meter lights and the VFO display have started to flicker. They flicker at random times very quickly (all at once). The LCD display bulbs don't flicker, but they have both burnt out now. And I just replaced them less than 2 years ago (with Kenwood factory replacements). I checked the voltage to the power amp and it reads 28.6 volts. The S-Meter (lights) read 13.6 volts and when the flicker occurs the voltage very quickly varies from ~6 to 13 volts - never above 13.6 volts. Is this some kind of voltage regulation issue? I can't get it to do this by moving wires around and pushing on things. It does only seem to effect the lights the are controlled by the dimmer switch. On a side note, I've been reading several posts about the 2N5885 that regulate the 28v supply for the power amp failing and wiping out the MRF-485 transistors that are no longer available. Does it make sense to preemptivly change the 2N5885 transistors to help prevent damage to those MRF-485? I use my 940 daily - and its on most of the day. -Scott,WU2X |
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