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did you clean and flux the joints before re-soldering, if not could this lead to failure in the future?
Thanks very much for this thread.
My wife has not had a clock in her Legacy since it was 18 months old. Subaru did not know what the problem was and by the time they had a proper look it was out of warranty....
I have spent the evening resoldering resistor R4 (511) with the help of failing eyes and a patient daughter to help.
Now fully fixed. Give yourself a pat on the back!
You've most likely found your fault... the resistors solder points are clearly dry jointed. ideally they need to be carefully removed and their ends re-tinned, otherwise a liquid flux pen applied to the resistor leads on both sides of the circuit board and fresh solder will enhance reliability,
R4 is apparently marked 511. That means 51 * 10^1 = 510 ohms.
We know it's a surface mount resistor, but we can be longer see @Graphite's images so I can't tell you what size it is.
If you can post a photo showing the pads with something nearby for scale (say, mm marks on a rule) then we can tell you.
haInteresting. It looks larger than 1206, and there's another one which appears to be the same size in the second picture (R18).
And it may be the light, but one end of R18 may not be soldered properly...
If I had to guess, I'd say a 1210 size 510 ohm resistor. However 1210 is an unusual size...
Search for "1206" on this page and see what size is closest to R18.