Chosen Solution
I could not find any entries for this brand and would like a manual for this if anyone has created this manual.
I don’t have a manual, but I have recently fixed one of these. The problem was 2 leaky capacitors (15uF 400V) in the PSU, which caused it to die slowly. It was tricky to get at the PSU as it is covered by a shield, which also limits the size of replacement capacitors. Another alternative is to replace the PSU with a similar 12V 1.5A one, or adapt the radio to use a wall wart PSU.
