Hi all,
I've been given an IC-R7000 that has been stored since several years and is not working...
I opened it and the RAM battery has been removed. I replaced it and have tested the receiver.
The VFO and keypad have no action on the RX, no valid frequency can be strored. The VFO has absolutely no action and with the keypad i can enter a frequency which is correctly displayed on the display. But when i press the ENT key, it changes to some garbage on the display.
This barbage can be stored in memories and be reset. So at least some parts are working.
I looked with a scope on several CPU pins and something is happening.. When i turn the VFO, i can see datas coming thru...
Where is the software saved ? Is it in the RAM or in the CPU ? Could it be corrupted ?
Any (good) idea is welcome... I would like to bring the baby back to live...
73, Patrick TK5EP
I've been given an IC-R7000 that has been stored since several years and is not working...
I opened it and the RAM battery has been removed. I replaced it and have tested the receiver.
The VFO and keypad have no action on the RX, no valid frequency can be strored. The VFO has absolutely no action and with the keypad i can enter a frequency which is correctly displayed on the display. But when i press the ENT key, it changes to some garbage on the display.
This barbage can be stored in memories and be reset. So at least some parts are working.
I looked with a scope on several CPU pins and something is happening.. When i turn the VFO, i can see datas coming thru...
Where is the software saved ? Is it in the RAM or in the CPU ? Could it be corrupted ?
Any (good) idea is welcome... I would like to bring the baby back to live...
73, Patrick TK5EP