SW904Interlock sw.SW902Thermal sw.F601Fuse 1131 4 7112124 7335531 31 3 1 2PowerOscillatorCircuit15.5V15.5V6V-6VFN901FN902FN903FN904FN905FN906BALAST_AC1LAMP_SW1LAMP_BST_SW1LAMP_BST_SW1P-FAILP-FAIL5V_SW5V_SWFAN DRIVE1FAN DRIVE1Fan ControlIC681IC671IC801SUB CPUIC1881BUFFERIC1871BUFFERIC2881TEMP.SENSORIC4881TEMP. SENS.TEMP. SENSORBOARD9-1013-1415-1611-12121247 80 8148823391415391218 28111715Q66137-38P.F BOARDPOWER BOARD MAIN BOARDLAMP BALLAST UNITAC INK6DK6EK6FK6JK6KK6MK6LK6S K8SK6S K8SK8B K8EK48EK8NK8PCB1CB2LAMP Ass'yLAMP_ERRSDASCLIC611P.F.CONTROLTSW611LAMPOn: HighOn: HighFailure: Low Failure: LowFailure: HighOn: HighOn: HighOn: LowOn: HighOn: HighF601SW902SW904IC2881IC4881-36-TroubleshootingPower supply drive and protection diagrams and locations