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Galaxy 919 DX no TX and the light does change to red

Discussion in 'General CB Services Discussion' started by Crossbow, Jul 11, 2018.

  1. Crossbow

    Crossbow Active Member

    Joined:
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    Had an old Galaxy 919 DX laying around that would not transmit. The light would turn from green to red when keyed up but no TX power. It will not transmit no wattage to the watt meter but it does have enough RF to make the freq counter lite up. On channel 20 I get 26.750.
    All the voltages check out on the PLL and have 10.2400 on pin 8. TP3 was correct having 16.4900.
    All voltages check out on IC2 and IC9. I know the final and driver are good as I can done the little trick of laying my bear finger across L44 and TP3 to make the radio key up letting me know these two are working.
    There has been no mods done to this radio at all and it is AM only no SSB. The board in this one is Ranger EPT092913Z I been using the voltage chart from EPT0696-10Z as that is the only chart I can find that is close to this model.
    Went through the whole TX side of the radio and everything was checking out fine until I came across TP5 not giving any frequency at all. Was getting 8 volts to the TP5 but not reading any frequency.
    This told me D97 and D95 was working but I checked them both and both had the correct voltage and working like they should be so I Un-Soldered the top of the 10.6975 crystal from the can it was attached to and it fell over into the radio.
    I had not un-soldered the legs from them main board yet and thought wow that was crazy how it just fell over. Both legs had corroded slam off. Picture attached.
    Replaced the crystal and the radio is now back up and running.
    I want to thank Andy for lending me a hand on steering me in the right direction to find this problem.
    Andy is going to make a graft for this layout. Hope this will help someone else out that runs into this same problem.
    IMG_0336.JPG


     
    Shadetree Mechanic and Dmans like this.

  2. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

    Joined:
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    Here's what I've got for you...

    Symptoms,

    No TX at all on AM,

    Galaxy919X4Top.png

    Graphic showing TP3 and TP5 and X4 - overlay on main PCB.

    Schematic of TX OSC...
    Galaxy919TXOSC.png

    Here ya' go!

    :+> Andy <+:
     
    #2 Handy Andy, Jul 11, 2018
    Last edited: Jul 11, 2018
    Shadetree Mechanic and Crossbow like this.
  3. Dmans

    Dmans Well-Known Member

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    Andy is the Man!

    73's
    David
     
    Crossbow likes this.
  4. Crossbow

    Crossbow Active Member

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    Thanks Andy! Looks great buddy!
     

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