Sanyo PLV-Z4000 Service Manual

Also see for PLV-Z4000: Owner's manual Specifications Specifications Quick reference guide

Contents

- 81 -● description of Power supply circuitWhen the projector is in the super standby mode, the Main power supply circuit is not working. And IC4801(Sub CPU),remote control, and Power LED are only working for saving the power consumptionWhen the projector is connected to outlet with AC power cord and the Mains SW is switched to ON, SS3.3V line is suppliedto standby circuit, including IC4801. IC4801 is waiting for the POWER ON/STAND-BY key input or remote control signal.When the projector is turned on, "STANDBY_SW" signal (Power ON:H) is sent to the ECO POWER board, and then theswitching power supply circuit starts operation. "POWER_ON_SW" signal (Lamp ON:H) from pin 25 of IC301 is also sent tothe POWER board, and then the lamp power supply circuit starts operation.The "1.8V_SW", "3.3V_SW", "15V_SW" and "FAN_SW" signals are also sent to the power supply circuits.Power failure protection of secondary power circuitThe projector provides a protection circuit to prevent the secondary failure when the power failure, fans failure or tempera-ture failure occurs on the projector. The power failure detection lines are connected to the main power supplies. When afailure occurs, IC301 receives the power failure detection signals "POWER_FAIL" through the power failure detection linesand "POWER_ON_SW" signal (Lamp OFF:L) is supplied to the POWER board to stop the power supply operation, and thelamp operation is stopped with "LAMP_SW" signal (Lamp OFF:H).Chassis Block DiagramsS5V5~9K8A1.2V_DS D52820.9V_REF_DETECTIC52031.2VDS_ON_PW1.2VDS_ON_FPGA3.3VDS_ON_PW3.3VDS_ON_FPGA3.3V_DS D5281IC52041.8V_DS1.8V_DDRD5283IC5207 D52831.2V_DSIC52032.5VDS_ON_PW2.5VDS_ON_FPGAIC5208 0.9V_DDR0.9V_REFIC301SYSTEMCONTROLPower Fail : LPFAIL_GROUP1Power supply circuit and Protection circuit (2)