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stuck in protection mode

  1. PE9ZZ

    IC chip HA12002 "stuck in protect" fix for Sansui AU-D11

    This is actually not exclusively Sansui related nor is the cause stuck in protect. The issue was that at powerup the Sansui AU-D11 amp on my workbench took ages (OK, several minutes) to switch on its output relays even though the amp's outputs were at zero. The cause was the voltage on C4 not...
  2. D

    CR-620 Stuck in Protection Mode

    Gang, I'm the original owner of a CR-620. Never over-worked, and always treated well. The only maintenance performed on it during its life was to clean the pots with Deoxit in attempt to fix "scratchiness", which worked perfectly. Turned it on in August 2018 and, low and behold, the output...
    • Demiglaz
    • Thread
    • cr-620 protection circuit relay stuck in protection mode
    • Replies: 38
    • Forum: Yamaha
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