Sharp LC-20AV7U Service Manual - Page 46

Main CBA Top View CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail. NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. 4A/125V CAUTION ! : For continued protection against risk of fire, replace only with same type 4 A, 125V fuse. ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V. NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. Because a hot chassis ground is present in the power supply circuit, an isolation transformer must be used. Also, in order to have the ability to increase the input slowly,when troubleshooting this type power supply circuit, a variable isolation transformer is required. MAIN CBA Ref No. Position ICS IC31 A-3 IC61 A-3 IC601 C-5 IC801 C-5 IC851 B-3 IC852 B-3 IC901 D-2 IC904 C-3 IC905 E-4 IC1202 E-1 IC1205 E-1 TRANSISTORS Q401 E-3 Q402 E-1 Q403 E-1 Q404 E-2 Q405 E-2 Q406 E-2 Q407 E-3 Q421 F-1 Q422 F-2 Q423 F-1 Q424 E-1 Q425 E-1 Q441 F-3 Q442 F-3 Q443 F-2 Q444 F-2 Q461 F-4 Q462 F-4 Q463 F-3 Q464 F-4 Q601 D-5 Q603 D-5 Q707 B-2 Q708 B-2 Q709 B-2 Ref No. Position TRANSISTORS Q802 C-5 Q901 E-2 Q902 D-1 Q903 D-2 Q905 D-2 Q906 D-2 Q907 D-2 Q908 D-3 Q909 D-3 Q910 D-1 Q913 D-4 Q916 C-4 Q917 D-2 Q918 D-2 Q919 D-1 Q923 D-2 Q1001 D-1 Q1002 D-1 Q1003 C-1 Q1004 D-1 Q1005 D-1 Q1006 C-1 C-1 CONNECTORS CN61 A-4 CN62 B-4 CN401 F-1 CN402 F-3 CN403 F-4 CN801 F-5 CN802 A-5 CN1201 A-1 CN1202 B-1 CN1301 D-1 CN1302 D-1 CN1303 E-1 9-12 BA7140F01013-1