Panasonic PT-44LCX65-K Service Manual

Also see for PT-44LCX65-K: Operating instructions

Contents

CHECKING THE POWER C.B.A.Disconnect all connector cables on the Power C.B.A., then take out the Power C.B.A. from the unit.Refer to Power C.B.A. Service Position, Figure 1.Check the following parts on the Power C.B.A. with the Tester.Connect a jumper wire between TP810 and TP811 on the Power C.B.A. by soldering.Replace any defective parts.Check the following parts with the Tester.D803 ~ 812, T801, RL801, RL802,Q801, R807, R808, R810Replace any defective parts.F801, F1001, IC1001 (Between Pin 1 and Pin 3), D1002, D1009, R1022, R1023, PR1001, PR1002, PR1003, PR1004,PR1005, PR1010, PR1011, PR1012, PR1013, D1028, R1025, R1029, D1020, D1011, D1012, D1014, D1005, D1006,D1007, D1010, D1013, D1017, D1015, D1019, D1018, D1016, IC1002, Q1001, Q1002, Q1003, Q1004, Q1005, Q1006P1006 (Pin 1)P1006 (Pin 6)P1006 (Pin 12)P1006 (Pin 17)P1006 (Pin 18)P1006 (Pin 20)P1006 (Pin 2)P1001 (Pin 5)P1001 (Pin 2):::::::::STBY+7VAMP+16VAMP-16VREG+30VUNREG+17VREG+9VAC STOPDC+19VDC+17V:::::::::Approx. +10VApprox. +15VApprox. -15VApprox. +30VApprox. +17VApprox. +9V(Refer to Figure. 1.)Approx. +18VApprox. +17VIs there a snap sound of the Relay turning ON?(Relay: RL801 on the Power C.B.A.)OKOKNGNGCheck the other parts on the Power C.B.A.and replace any defective parts.NGCheck the incorrect voltage line and surrounding parts.Replace any defective parts.NGStill NGNGPlug in the AC Cord.Plug in the AC Cord and turn the power ON.Does the Lamp light up?There is no problem with the Power C.B.A. However,the other C.B.A. is defective. Check the Main C.B.A.and Base C.B.A., and repair if necessary.(Check LAMP ON(H) signal(Pin 20 of IC6003),STANDBY(L)/POWER ON(H) signal(Pin 21 of IC6003),ATSC ON(H) signal (Pin 105 of IC6003), etc., on theMain C.B.A.)Check the Waveform between TP1008 andTP1007 on the Power C.B.A.Unplug the AC Cord.Remove the jumper wire between TP810 and TP811 on the Power C.B.A., and reconnect all connector cables, thenreinstall the Power C.B.A. into the unit.OKCheck the voltage at the following points.(Use Pin 30 of P1006 as GND.)OKOKThe Ballast C.B.A. is defective.(Refer to "CHECKING THE BALLAST C.B.A.")There is no problem with the Power C.B.A.PT-44LCX65-K / PT-52LCX65-K / PT-61LCX65-K112