Contributor I

Sonos Sub main PCB - R37 resistor burnt (reopen)

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I saw a previous thread regarding this failure with burnt R37 on a Sonos sub main PCB, but it was closed perhaps due to inactivity. However, I was wondering if any other users also faced the same issue and possibly have an idea of the possible cause to this failure. I like to repair my unit, as the companion Sonos beam is still working fine. I bought the set in 2019, I have forgotten what generation that is, maybe someone here who is well versed with Sonos product could help me identify.

[new OC]

Have ordered replacement SMT parts since some of the parts are now end of life from the manufacturers of the components.

Details

  ┌─────┬───────────────────────────────────────┬─────┬────────────┐
  │ Ref │                 Part                  │ Qty │ Ext. price │
  ├─────┼───────────────────────────────────────┼─────┼────────────┤
  │ D15 │ Diodes B280-13-F                      │ 2   │ $1.74      │
  ├─────┼───────────────────────────────────────┼─────┼────────────┤
  │ Q10 │ Diodes ZXMP10A13FQTA                  │ 2   │ $2.88      │
  ├─────┼───────────────────────────────────────┼─────┼────────────┤
  │ Q16 │ onsemi MMBT2907ALT1G                  │ 2   │ $0.32      │
  ├─────┼───────────────────────────────────────┼─────┼────────────┤
  │ C85 │ KEMET C1210C105K1RACTU (substitute)   │ 2   │ $2.30      │
  ├─────┼───────────────────────────────────────┼─────┼────────────┤
  │ R77 │ Yageo RC1206FR-071RL (1 Ω, 1206, ¼ W) │ 10  │ $0.47      │
  ├─────┼───────────────────────────────────────┼─────┼────────────┤
  │ R37 │ Panasonic ERJ-3EKF1001V (substitute)  │ 10  │ $0.22      │
  └─────┴───────────────────────────────────────┴─────┴────────────┘

Thanks to : TheSchnibble for the Original parts list and the original thread:

Check out the Video repair link here: