Syntech I VCO Mod/Adjustment??
Posted: Mon Dec 01, 2008 2:39 am
I have a Syntech I 70-530 that was programmed:
442.000 RX
447.000 TX
We just changed it to:
449.850 RX
444.850 TX
Display shows 95 after powering up, that was expected, VCO unlock.
According to the service manual i should adjust L702 while monitoring the test point T701 and set it for 5.5v. Can't do it, its at 6.89v and that's where it stays, i moved that slug from top to bottom three times in a small increments and watching the meter while moving it up and down, voltage doesn't change.
What do i need to do to get the VCO to lock???
442.000 RX
447.000 TX
We just changed it to:
449.850 RX
444.850 TX
Display shows 95 after powering up, that was expected, VCO unlock.
According to the service manual i should adjust L702 while monitoring the test point T701 and set it for 5.5v. Can't do it, its at 6.89v and that's where it stays, i moved that slug from top to bottom three times in a small increments and watching the meter while moving it up and down, voltage doesn't change.
What do i need to do to get the VCO to lock???