Sanyo PLC-SW10 Service Manual

Also see for PLC-SW10: Owner's manual

Contents

-34-NO POWER1. Is fuse (F901) blown?Fuse may be opened when either the LAMP indica-tor or the READY indicator isn't Illuminated. Checkthe fuse. For continued safety, replace with a fuse of thesame type.TYPE T4.0AH 250V FUSE. (LITTLE FUSE INC.TYPE 215004)2. Is projection of lamp cover inside broken or not fit-ting?Check the INTER LOCK switch(SW904) and lampcover.SW904 ......................................... OPEN : abnormal3. Is thermal switch(SW902) operating?If temperatures periphery of lamp house reaches100˚C, the thermal switch will be turned off automat-ically.SW902 ......................................... OPEN : abnormal4. Is the WARNING TEMP. indicator flashing ? Thethermal sensor IC (IC2832) on the Temp. board orIC2831 on the main board may detect the abnormaltemperature inside of the projector. If one of theseICs detects the abnormal temperature, this projectorwill be turned off automatically.1. Are the LAMP indicator(red) and READYindicator(green) light?If the LAMP and READY indicators do not illuminat-ed, check the primary circuit and S6V of standbypower supply circuit.2. Check that the LAMP BST-SW signal is correct.Pin 12 of K6K ............................................... H : ON3. Check that the 5V_SW signal is correct.Pin 11 of K6K ............................................... H : ON4. Check that the POWER FAIL signal is correct.Pin 13 of K6K ....................................... L : abnormal5. Is thermal switch(TSW611) operating?If temperatures periphery of P.F.C. circuit reaches95˚C, the thermal switch will be turned on automati-cally.TSW611 .................................... SHORT : abnormal6. Check the signal at pin 5 of T651. (Switching powerIC output signal)POWER BOARDPERIPHERY OF CHASSIS1. Check that the 15.5V is observed at pins 1-3 of K3C.2. Check that the 6V is observed at pins 6-8 of K3C.3. Check that the -5V is observed at pin 9 of K3C.4. Check that the 5V is observed at pins 10-11 of K3C.5. Check that the 6V is observed at pins 2-4 of K3D.6. Check that the 15.5V is observed at pins 7-8 of K3D.7. Check that the 5V_SW signal is correct.Pin 11 of K3D................................................ H : ON8. Check that the LAMP BST_SW signal is correct.Pin 12 of K3D................................................ H : ON9. Check that the POWER FAIL signal is correct.Pin 13 of K3D ...................................... L : abnormal10. Check that the 12V is observed at test pointsTP6101. TP6102 and TP6103.11. Check that the LAMP_SW signal is correct.Pin 4 of K8CC ............................................. H : On12. Check that the LAMP_ERR signal is correct.Pin 1 of K8CC .............................................. L : On13. Check that the POWER FAIL signal is correct.Pin 2 of IC1851.................................. L : abnormal14. Check that the Sensor IC(IC2831) detects abnor-mal temperature inside the projector.1. Check Power Supply and switching circuitCheck ICs IC2641 to IC26912. Check that the POWER FAIL signal is correct.Pin 11-12 of K3A ................................. L : abnormal3. Check that the FAN_DRIVE signal is correct.Pin 7-8 of K3A ............................................... H : OnCOMPONENT BOARDMAIN BOARDTroubleshooting