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The "blistering" just above the spots you solder the audio and Mic Pin 1 (Shield/Ground/Common) where the White (audio to Mic amp) and Black (foil ground) in my photos are from the "glue" so it is possible that it can "peel" off the foil - a simple fix is to locate Pin 3 follow it to the ferrite beads (L553) top soldering spot and solder a jumper to that switch's middle pin closest to the mic jack - refer to photo for location - provided if the glue hasn't shredded the traces to the bead from the Mic Pin 3 jack.

If that restores TX - sorry about all the Transistor stuff - for Kaos was correct to check the CB PA switch, for the pole closest to the mic jack, is your CB/PA TX switch - for it then simply "grounds" No switching - TR30 "ON" and audio then shows up thru the Volume control - the other column of pins in the photo simply route the speaker out to the EXT Speaker jack in the back of the radio. There is nothing to force the TX mode - so essentially the radio is on, but the Transmit side is never turned on.

So with D38 never "on" let alone "off" - told me the TX side is still goofy and something is not making the Diode "Mute" the audio amp.

<blockquote data-quote="Handy Andy" data-source="post: 632593" data-attributes="member: 52309">The &quot;blistering&quot; just above the spots you solder the audio and Mic Pin 1 (Shield/Ground/Common) where the White (audio to Mic amp) and Black (foil ground)&nbsp; in my photos are from the &quot;glue&quot; so it is possible that it can &quot;peel&quot; off the foil - a simple fix is to locate Pin 3 follow it to the ferrite beads (L553) top soldering spot and solder a jumper to that switch&#039;s middle pin closest to the mic jack - refer to photo for location - provided if the glue hasn&#039;t shredded the traces to the bead from the Mic Pin 3 jack.If that restores TX - sorry about all the Transistor stuff - for Kaos was correct to check the CB PA switch, for the pole closest to the mic jack, is your CB/PA TX switch - for it then simply &quot;grounds&quot; No switching - TR30 &quot;ON&quot; and audio then shows up thru the Volume control - the other column of pins in the photo simply route the speaker out to the EXT Speaker jack in the back of the radio. There is nothing to force the TX mode - so essentially the radio is on, but the Transmit side is never turned on.So with D38 never &quot;on&quot; let alone &quot;off&quot; - told me the TX side is still goofy and something is not making the Diode &quot;Mute&quot; the audio amp.</blockquote>

[QUOTE="Handy Andy, post: 632593, member: 52309"] The "blistering" just above the spots you solder the audio and Mic Pin 1 (Shield/Ground/Common) where the White (audio to Mic amp) and Black (foil ground) in my photos are from the "glue" so it is possible that it can "peel" off the foil - a simple fix is to locate Pin 3 follow it to the ferrite beads (L553) top soldering spot and solder a jumper to that switch's middle pin closest to the mic jack - refer to photo for location - provided if the glue hasn't shredded the traces to the bead from the Mic Pin 3 jack. If that restores TX - sorry about all the Transistor stuff - for Kaos was correct to check the CB PA switch, for the pole closest to the mic jack, is your CB/PA TX switch - for it then simply "grounds" No switching - TR30 "ON" and audio then shows up thru the Volume control - the other column of pins in the photo simply route the speaker out to the EXT Speaker jack in the back of the radio. There is nothing to force the TX mode - so essentially the radio is on, but the Transmit side is never turned on. So with D38 never "on" let alone "off" - told me the TX side is still goofy and something is not making the Diode "Mute" the audio amp. [/QUOTE]

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