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Ok, Everything falls within specs,(I don't have a tone generator so I had to skip that part) I reinstalled the mods, and once again pin 10 does nothing, everything else works fine. pin 10 must be dead. Talked to my friend again after tweaking everything he said the audio sounded spot on. Think I...

Oh Mine has the PC-409 board would it still be the same allignment proceedure?

Thanks Rob, I'll give that a try tomorrow. Got a 5 o'clock start time in the morning, going to be a long day. I'll let you know how that turns out, and then I'll try putting the frequency mods back in.

I don't know anyone with one, I do have a frequency counter, and a 30mhz oscope that I inherited if that will help me get it lined up.

ok, I got the clairifier opened back up. I did'nt get the full 4kz down and 1 kz up. clarifier is off center, talked to a friend of mine a few miles away, he said it sounded great on all 3 bands. I tuned to him. so I guess everything must be close in allignment.

ok I had time to sit down and work on this thing today, I took all mods out including clairifier mod, all the components was still there they just lifted one leg and soldered jumper on bottom of board. evrything lined back up and radio worked flawlessly. So now I'm going to start over on the...

I will take it back to stock, lucky enough it looks as if nothing has actually been clipped out as far as tune ups, the clarifier mod is ok to the point that transmit and recv is alligned although the clarifier is not centered, but a little research should bring forth results on how to do that...

Ok guys no joy :( replaced switch no change, wired pin 10 directly to board ground still no change. PLL is MB8719 (Japan model) I think before I go through all the hassle of finding, puchasing, and replacing the pll I will just find another mobile. Being I've been out of the loop so long any...

Ok, I will give that a try, I happen to have a new one I piked up at the rat shack last week.

Ok, I took a look and it has the 11.3258 mixing crystal so it sounds as if there is a problem with pin 10. So what would cause this problem? I'm not a tech but I do have a few bench tools I inherited, if they will be any help.

Ok, I rewired and ohmed out all the switches, changed the old wires with new wires (some cat5 cable i had extra). tried adjusting L19 but nothing. It's like the switch does nothing at all, no frequency change at all. It remains on the same frequency with the switch on or off. Did they use...

Ok guys I picked this mobile up at a flea market, It has the PC409 board with the MB8719 chip. it has 3 SPST switches mounted in the case, and the clairifier has been opened. here's the problem Switch one connects pin 11-12, switch 2 connects pin 10 to board ground, switch 3 connects pin 16 to...