Roberts R9954 AM-FM radio.

[Turnip]

Hi folks,

Got one in as customer had dropped it into a bucket of water - 'Normal for Norfolk' some say.

When dry it 'motor-boated' due perhaps to a duff audio chip. Legend on the 8 pin chip was CHMC S.80 D820. Naturally couldn't get a schematic as doubtless made in China. Checked about a bit where a chap with a Steepletone radio suggested it might be a TBA820M.

As the only suggestion, got some - Total silence. Thought check about as pinning was identical. Noticed pin 7 had no 56 Ohm to +ve as the TBA820M

does. Success a bit, but noticed instability, so sorted around with a 22nf ceramic where from pin one to -ve - Normal working

Used to like Roberts radios, but not much - Chris.