Power Supply Unit For 32", 37", and 55" sets, power supply units should be repaired on component level. All other power supplies are a black box for Service. When any of these power supplies is defective, a new board must be ordered and the defective one must be returned, unless the main fuse of the board is broken. Always replace a defective fuse with one with the correct specifications. This part is available in the regular market. Replace safety components, indicated by the symbol , only by components identical to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard. PLDC-P109B (32" sets) and PLDD-P109A (37" sets) The output voltages to the chassis are: * V STB (+3.3 V; stand-by mode) * V SSB (+12.3 V; on-mode) * V SND (+12.3 V; audio circuit). Test instructions 32" & 37" * check fuse (F101) * standby check VSTB (C306), measure 3.3 V * PFC voltage check (C644), mea...