I called Icom and no luck. They don't have any PA boards left and they don't even have most of the parts. I will have to comb Ebay and wait I guess. Thanks for watching.
Call a US Navy Electronic Technician qualified as a 2M technician to fix it. a must do if at sea. Looks like a lightening strike. Been there done that several times.
I would say it was a lightning strike except that the rest of the radio works fine. No idea but keep watching. I have a new idea on how to fix this thing.
Where did you get that repair / service manual you start using about 11 minutes in to the video? I have an IC718 that is DOA - just won't turn on, and I could sure use that kind of info - thanks.
Wow, that would be a project! What caused the fire, any failed components? Looks like those resistors got hot but why? A big problem would be that the top and bottom layers are stitched together with lots of vias. I think I would try to find a donor unit.
I just noticed, did icom use the same corrosive glue on the board, that uniden used on the 2510??...so what's the dill, pickle, u gonna fix it or not??
I would try to power up the radio without the PA board and see if everything else works. If other things don't work then it is probably more work then is worth it.
Looks like something got a little toasted from the looks of the case. I'll bet is smells as toasty as it looks. When you first pulled the fuse I saw 6 amps so I was wrong. Still a good fuse! Someone must have left it out in the rain and it got struck by lightning. Cheers & 73 from W Rusty Lane K9POW in eastern TN
Just borrow someone's Icom-718, take out the board than install it in yours for testing purposes. If it's working OK then order a new board from Icom directly. The cover can be repainted easily. The tuner, display, looks fine. Let us know what is your decision.
First thing is CLEAN the board, and then clean the board. Makes it easier to see what is actually bad/burnt. Looks like radio was NOT fused and Q4 and/or Q5 shorted - OR - not fused and electrolytic caps shorted. Check Q4 and Q5 and see if they are good, if so, I would say electrolytic caps caused the issue. If it was the caps shorting, board can most likely be repaired. I have worked on worse! Mac KB7QKS
I tried to clean it. The problem is that the board is so charcoaled that I have high resistance just between board chunks.i have another idea though. Stay tuned.
Before you consider it check all the Pa Devices. If they are good then maybe, I mean what fault could exist to cause a fire apart from a direct short to ground. and if so why didnt the supply fuse blow? If the PA devices are good go for it. I guess Icom no longer have any spare pa boards.
One of the output transistors is bad but the rest of the trannies test ok at least in circuit. I have looked all over the place for a PA board and no luck. If I want this thing to work it looks like I may have to fix the PA board. Fun times.
It could be but usually a lightning strike that could start a fire like that would take out the receiver too and that works just fine. I have a new idea on how to fix that radio. Keep watching.
Not good I am afraid. There seems to be something wrong with the transmit section. I don't have anything coming out. But on the other hand it makes a dandy receiver.
Found a board and it all works now. I did try to cut out the burnt parts but even then there was a measurable resistance internally and since that area is where all the high power RF goes I figured it would never work right.
Trust me, I have tried. I even went straight to Icom and was informed that there were no boards, parts or any hope of ever being. I have a 180 watt PA kit and a 3 watt driver that will fit in the case I just have to get time to do it.
@@AERVBlog i just bought a 718 and i like it but it aint no yaesu ! i keep going back to my 757 ... the 718 is a great radio for the money with a proven past ... i didnt spend much for it and it works well .. its getting harder and harder to find good bench techs ..parts availibility is going from bad to worse with no hope n site ..ttfn
I wouldn't use it. I would just get a new one. Too unsafe. You could always order one off ebay and or make your own rf deck. Those transistors are still available.
