Sanyo PLC-EF31 Service Manual

Also see for PLC-EF31: Owner's manual Service manual

-24-9V16V6.25VDELAYABNORMALVOL. DET.LATCHSTARTLOGICOC-RC OSCCONTROLREFOSC321ABNORMALTEMP. DET.PC612PC611D652D651IC652D655T621654 321654 321123PROTECTION8 9 15 21141210456117VccFETFETCONT G (L)G (H)OUTVinVOLTAGE CONTROLABNORMAL VOLTAGE DETECT-6VSTR-Z2156Switching regulator* NO POWER-2 TroubleshootingIC632If a temperature of thisframe reaches to 150˚C,the IC632 will be shutdown.If this Vcc voltage reaches toabnormal voltage (exceeds22V), the IC632 will be shutdown.If this voltage reaches toabnormal voltage (exceeds6.8V), the IC632 will be shutdown.Timing chartPin 4OSC OUTPin 2Pin 10Check the signal at pin 5of T621. (Switching powerIC output signal.)Caution : "HOT" Circuit !5CHECK !Check the switching regulator.