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Gday Voltage on pin 11 of pll is 5v pa/cb display doesn’t change regardless of switch postion tried on both pc122xl the working and non working the mic socket looks fine i have the facia off pa doesn’t work at all my problem is voltages missing at 15/16 of pll and q32 pulled transistor and its...

Gday I dont lose channel readout it stays on regardless of cb/pa switch position this must be the issue, i only did a continuity test on the switch and its switching but most likely no power being supplied Mike ic4 voltages are good checked against another pc122xl have checked voltage on pin...

Gday I have tried pa with external speaker plugged into jack and nothing,im missing voltage on pin 15/16 pll i dont lose channel display when switching between pa/cb should i ! also missing 5v at base of q32 ,tried different mic no difference still no tx or rx pll wont work without 5v at pin 16...

Gday Have found both pin 15/16 of pll has no voltage and channel display is missing segments like theres not enough voltage there to power the display Thanks joe

Hi I have found no voltage at pin 16 of pll and ic5 has 6 volts at pin 6 so i think the ic5 is working im still to track down the missing voltage some other component has failed any ideas Thanks joe

Gday This is the transistor i pulled its a toshiba 2sb753 checked it with dvm and its working im guessing it just a bad cap finding it is a different story i was thinking of an esr meter so i can test them all in circuit Thanks joe

Hi Pin 15 16 of the pll (ic2)voltages show 5 volts at first and then drop to 3.5 volts like its unstable it seems like theres an issue there Thanks joe

Hi thanks for the service manual

Gday I do hear a tiny pop when i power on but no volume even at max,squelch is set to minimum checked mic with multimeter and its switching checked pa with external speaker no audio,no tx light,checked cb/pa switch and it working,when i key the mic theres nothing like its not even there tried...

Gday The internet is a wealth of information and i believe somebody here can help Eg a friend of mine is a mechanic we have a electrical problem with the car taking out the headlights we need lights to drive home 2 hours there is a short in the wiring but where is the short within 5 minutes...

Gday Tx light doesnt illuminate! replaced c101 still nothing im still to check voltages on pll ill post back when ive carried out those measurements Thanks joe

Thanks for finding that thread ill check it out

Gday Not much glue was used in this radio just a bit around the caps i replaced no corrosion anywhere in the radio i think maybe caps that have degraded in storage just a guess

Gday I have a dvm,freq counter several radios watt meter dummy load what i dont have is an esr meter to test caps incircut without replacing all caps and no oscilloscope but im willing to get one any suggestions! Thanks joe

Not sure how to check notes

Thanks i will check voltages at pll

Hi Checked voltage at ic4 and have 13.5 at one pin and 8 volts at the other also i have no way of checking frequency at the pll do i need a scope for this measurement also no popping when radio is powered up no volume with squelch down at max volume its like its not switching between pa and...

Hi Microphone has been checked and is the original mic signal meter doesnt move on rx or tx totally dead radio sat idle for a few years and then i switched it on and nothing Thanks to everyone for your input ill carry out some voltage checks

Radio is not worth sending it to a tech i would like to give it a go myself just for fun Thanks joe

Hi Just looking for a few hints as to where i should start i found one bad cap but that didnt fix it i dont know how to fault find all i know there is no tx no rx checked mic seems ok channel display comes on no tx light when i key up I have Very limited electronic experience Thanks joe