-90-Chassis DescriptionPower failure detection systemdetection of Power failureProjector provides a protection circuit to prevent the secondary failure when the power failure, fans failure or tem-perature failure occurs on the projector. The power failure detection lines "P_FAIL_S5V", "P_FAIL_15V", etc. are con-nected to the main power supplies and fans. When the failure occurs, IC301 CONTROL> receives an errorinformation through the power failure detection lines and turns off the signal "LAMP_DC_ON" output from pin 111 tostop the power supply.The power failure detection signals are sent to IC1801 EXPANDER> and then sent to IC301 CON-TROL> .diagnosis Information of Power FailureIc1801detecting Signal Failure circuit/PartsP_FAIL_1.8V 1.8V, 1.V and peripheral circuit on the Main BoardP_FAIL_S5V S5V, S1V, S9V and peripheral circuit on the Main BoardP_FAIL_15V 15V, 5V and peripheral circuit on the Main BoardP_FAIL_S1.V S1.V and peripheral circuit on the Main BoardP_FAIL_S-5V S-5V and peripheral circuit on the Main BoardP_FAIL_PJ PJ-Network Board and peripheral circuit on the Main BoardFAN_SPEED Failure of Fan, FN901, FN90, FN903, FN904, FN905 connected to the Power(DC) BoardError information tableIc Pin Signal Name connection Lines error Information Failue AreaIC180161 P_FAIL_1.8V 1.8V, 1,V MAIN, 1./1.8V 3.3V, 1.V, 1.8V line onMain6 P_FAIL_S-5V S-5V MAIN, S-5V S-5V line on Main, AV63 P_FAIL_S1.V S3.3V/FPGA, S.5V/FPGA/S1.V FPGA, S1.V S3.3V, S.5V, S1.V line onMain64 P_FAIL_15V 15V, 5V MAIN, 15/9/5V 15V_PNL. 15V_LNS,9V_LNS, 5V line on Main65 P_FAIL_S5V S5V, S1V, S9V MAIN, SS5/S9/S1S5V_TEMP, S5V_AUDIO,S5V, S9V_AUDIO, S1V,S5V_PW line on Main66 P_FAIL_PJ PJ-Network Board, AV PJ_N/AV, 3.3/S5V PJ-Network Board, 3.3V,S5V line on AV, JointIC701103I108FAN_SPEED5(FAN_MTR5)IFAN_SPEED1(FAN_MTR1)FAN CONTROL FAN, FANLOCK Fan Control on Power(DC)
