Another PC122XL TX Problem

[Low_Boy]

Walking out the door now bet will check what you mentioned if I get in early enough. I will take the front apart again and look that over also
Just seems funny the PA works with steady talking.
Thanks

 

[Low_Boy]

Andy, I got thinking about this. I checked a lot of transitors. Some were not installed like the silkscreen. I am wondering if I have one installed like the silkscreen but should actually be in the other way? I hope you understand this I'm doing it on my phone.

 

[Handy Andy]

That I do, both phone and orientation...

Can you give me the Transistor numbers of your TR 31, TR32 and TR33 stuff?

I can look up some pinouts and see if they are what you and I fear...

 

[Low_Boy]

So used to putting everything in the way they were showing on the board I may have put one in the right way by accident. Wow doing something right by accident LOL

 

[Handy Andy]

Wow...Usually it's me with that kind of luck...

You have a 50/50 chance of installing it right if the part number don't match - usually.

The Usually part, in my case, is a lot like a bad penny - never flips right and every time you try to get rid of it, another one takes it's place!

 

[Low_Boy]

TR 33 is the main transistor I am questioning. Does that sound like a symptom?

 

[Handy Andy]

Got a number for it?

 

[Low_Boy]

When I get home

 

[Low_Boy]

Andy. I checked out placement of all transistors last night and all are correct. I then pulled another radio apart and everything was in the same direction.

 

[Handy Andy]

Then I've done all I can...

 

[Low_Boy]

Oddest thing ever.

 

[Low_Boy]

Andy back on this. I checked voltages on the AN612 while keying the mic. All showes good eccept pin 1. Should be 0V but shows2.8v unkeyed. And 2.75V keyed up. All caps. new and installed correctly.

 

[Robb]

DID YOU INSPECT all SOLDER JOINTS?
DID YOU PROD THE BOARD WITH A PENCIL/ERASER?
DID YOU TRY THE WET FINGER TEST?
(sorry for the caps)

 

[OldTech03]

Did you try sitting on the radio while reading/studying the schematics to see if it will handle the weight of all that heavy thought? LOL Sorry, not much help am I.

 

[sonoma]

do you have another an612 you can try. I had a radio afew years ago that all voltages were right but the radio would not work and the an612 was bad. not letting the freq mix at it..
Andy is the best on these but just a thought until he chimes in.