Model 1U71SABFRA Not amateur radio related but might serve as a reference for someone, and a future reference for me as I have 4 of these. The indoor unit started giving an error E7 flashing on the display and no cooling or heating – the outdoor fan was not starting at all. I managed to …
Tag: Repairs
Nov 23
Icom IC-7300 Over Voltage Repair
Parts of this repair could also be valid if you reversed polarity to the radio, though the survival for reverse polarity should be better as a diode (marked C further down) should just blow the fuses on your DC cable. Now to the over-voltage bit…. A linear power supply without a crowbar protection circuit is …
Nov 23
LimeSDR Mini Repair
Having been one of the initial backers on CrowdSupply, I received the LimeSDR Mini around mid-2019 and started playing with in the 2020 lock-down. Link to LimeSDR on Crowd Supply I was noticing that after using it for around 15 minutes, the received signal levels were getting lower and lower until eventually disappearing, the chips …
Nov 23
Icom IC-7300 Clock Repair
The Icom IC-7300 has an internal rechargeable battery to retain the running of the Real Time Clock – RTC. The battery charges when connected to your power supply, however drains deeply when left un-powered for a while. The issue seems to be that this Lithium Ion battery has a limited number of deep cycles and …