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Galaxy 22b

MonsterAudio

Member
Mar 17, 2011
22
0
11
hello all,

I have a 22b here that i was having an audio issue with, after transmitting for a short time, the audio would get really trashy, like off freq trashy.
so, i went over the whole board and touched up every solder joint on the board. i did fine 3 cracked solder joints that was the cause of my audio problem.
however after i got done with that, i plugged it up and NO AM RX!
ssb,fm all rx fine, just AM i have no RX and no white noise in the speaker.
I thought that i had some solder touching that shouldn't be somewhere in the radio, so i took out another 22b i have here and compared the 2.
I can see nothing touching (i may be overlooking) but i have looked it over several times.
My question is, where in the radio do i need to look, or what part/parts do i need to replace to fix the NO RX on AM only?
its apparent that I'm in the wrong part of the radio, because i ha ve already replaced,
c102,c103,c58,ic11,q29,vc1,c21,r22-23, you get my point..

does anybody know what causes the RX on AM to not work at all? while letting ssb and fm work fine? this is a really great radio and would really like to get this fixed, but I'm out of ideas and places to look, so I'm hoping that somebody here can point me in the right direction.
 

I think that you have inadvertently made this happen. How fortunate for you that you have another radio just like it to compare! And yes; it is a bridged solder joint somewhere on the board. You will need to compare all of the solder joints once again. Hope you have a magnifying glass a a large dose of patience - that will git'er done.

Once you find the bridged solder joint and fix it, make notes of it. Because if you fix the traces and it still doesn't work; then something in that circuit got voltage or was grounded that shouldn't have been - and now is probably fried. But it will be a lot easier to fix to use a schematic to trace all of the parts that could have been affected.
 
I think that you have inadvertently made this happen. How fortunate for you that you have another radio just like it to compare! And yes; it is a bridged solder joint somewhere on the board. You will need to compare all of the solder joints once again. Hope you have a magnifying glass a a large dose of patience - that will git'er done.

Once you find the bridged solder joint and fix it, make notes of it. Because if you fix the traces and it still doesn't work; then something in that circuit got voltage or was grounded that shouldn't have been - and now is probably fried. But it will be a lot easier to fix to use a schematic to trace all of the parts that could have been affected.

o no doubt, once i plugged it up and no am rx i knew i shit something up.
However, after replacing all those parts, i figured that seeing as how its a pretty centralized (am Rx only) problem, somebody would know where to "start looking" for the am Rx, because other than that I'm looking for a needle in a stack of needles, just trying to make it as easy on myself as i can.


i did look at that galaxy database thing, it says something about ic3 for a similar problem, so ill just replace IC3 and that transistor, however the transistor that it says replace is NOWHERE near the IC in my 22b, its all the way up front, but i will replace that one as well as the one near the IC, ill also replace the diodes as well.

not unless of course anybody has another idea? because I'm allll ears @ this point lol
 
o no doubt, once i plugged it up and no am rx i knew i shit something up.
However, after replacing all those parts, i figured that seeing as how its a pretty centralized (am Rx only) problem, somebody would know where to "start looking" for the am Rx, because other than that I'm looking for a needle in a stack of needles, just trying to make it as easy on myself as i can.


i did look at that galaxy database thing, it says something about ic3 for a similar problem, so ill just replace IC3 and that transistor, however the transistor that it says replace is NOWHERE near the IC in my 22b, its all the way up front, but i will replace that one as well as the one near the IC, ill also replace the diodes as well.

not unless of course anybody has another idea? because I'm allll ears @ this point lol

well i did find 1 solder bridge, it was on ic20, i replaced the chip, as well as the 4.7uf cap (c109) and still nothing, i also replaced ic3, im @ a loss, still no am rx, can anybody help?
 
well i did find 1 solder bridge, it was on ic20, i replaced the chip, as well as the 4.7uf cap (c109) and still nothing, i also replaced ic3, im @ a loss, still no am rx, can anybody help?

well i have replaced everything i can see, ic's and everything, still no AM rx, does anybody know a Galaxy tech that can help on this?
 

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