JCPenney Pinto 23 Channel SSB Transceiver No transmit or Receive.

[MindenJoe]

Hi everyone, I picked up a vintage CB on eBay, It looks great, has the original box and documentation. I have two questions, first I know that KQK-4794 is the call sign. What does the A1341 and US-69 signify? Next question and main concern, I have no transmit or receive on AM or SSB. Meter shows no activity and moves ever so slightly when I transmit but I can not hear anything on my handheld CB. No sound coming out of the speaker even when turned all the way up. you can hear the speaker pop when you adjust the squelch, I tried hooking it up to another speaker but no go. PA switch is set on CB. Looking inside, it looks like nothing has been modified. I did notice that one of the capacitors is bulging and leaking a little on top. I've ordered the SAM's service manual and will start with replacing all of the capacitors. Can bad capacitors cause no receive or transmit? I think this CB has been stored away in the box for decades. Unfortunately I don't have a scope, frequency counter or tone generator as part of my equipment. Thanks for your help!

 

[doctordialtone]

What does the A1341 and US-69 signify?

A1341: High Precision, Programmable Linear Hall Effect Sensor IC with EEPROM, SENT and PWM Output Protocols, and Advanced Output Linearization


A1341: Linear Sensor IC with Advanced Output Linearization

 

[WB9YBM]

Next question and main concern, I have no transmit or receive on AM or SSB. Meter shows no activity and moves ever so slightly when I transmit but I can not hear anything on my handheld CB. No sound coming out of the speaker even when turned all the way up. you can hear the speaker pop when you adjust the squelch, I tried hooking it up to another speaker but no go. I did notice that one of the capacitors is bulging and leaking a little on top.

Yes, bulging caps are certainly a concern; I'd start by replacing those. If nothing improves, I'd replace the audio amp I.C. (it usually does all the audio work--transmit, receive, PA).

 

[MindenJoe]

I've starting removing the caps before the new ones arrive later this week. Toughest cap replacement yet for me. I can't believe the amount of solder that was used. The board is pretty crowded also. Probably because it's vintage and SSB. This board is also not marked and the SAM's manual does not show all the caps. I'm taking my time to write down where I removed the ones not in the manual to make sure I replace the correct capacitors.