Whirlybird
Newbie level 3
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Hi can any body help. I am trying to repair a GM340 that someone has connected to a battery the wrong way around with no fuse! I have replaced the protection diode and Q3411 & Q0661. The radio now switches on and receives OK however it does not Tx (Tx led on and current draw 500mA). My question is what is the chance of the PA device u/s as I can’t do any meaningful test because when the cover is removed the radio cannot Tx anyway! All voltages seem OK and resistance measurements all look sensible. I fix radios all day but this one has me flummoxed is their a special jig to simulate the cover being on in order to fault find?
Hi can any body help. I am trying to repair a GM340 that someone has connected to a battery the wrong way around with no fuse! I have replaced the protection diode and Q3411 & Q0661. The radio now switches on and receives OK however it does not Tx (Tx led on and current draw 500mA). My question is what is the chance of the PA device u/s as I can’t do any meaningful test because when the cover is removed the radio cannot Tx anyway! All voltages seem OK and resistance measurements all look sensible. I fix radios all day but this one has me flummoxed is their a special jig to simulate the cover being on in order to fault find?