Philips LX3000D Service Manual page 9

REPAIR INSTRUCTIONS
Aux/TV/Tuner
No output
See (E) and (F)
Repair chart
Change Amplifier IC Yes
IC501 or IC502 or IC503
Check IC409 IC410 IC411
Change
No Power supply Yes
R4105 or R4106
Pin4=(-12V) Pin4=(-12V)
Pin8=(+12V) Pin8=(+12V)
Yes
Check IC409 IC410 IC411
Bad Cause Damage
2-3
C
Audio output DVD audio
No Sound No output
All channel no oosund See (D)
Repair chart
Check all cable is loose RE-Insert and fix
Yes
the cable
or bad INT
No
Change fuse
Check fuse F901/F902 Bad
F901 orF902
Bad Cause Damage
OK
Check Amplifier
IC501/IC502/IC503
No
Change D901
Power supply
Pin1=-Vss(-17.5V to -20V)
Pin3=+Vcc(+17.5V to +20V) Pin3=+Vcc(+17.5V to +20V)
Yes
Check system power supply
Check IC901,IC902 or R901,R902
No
IC901 Pin3=(-12V)
Bad Cause Damage
IC902 Pin3=(+12V)
Yes
Check IC501/IC502/IC503
Audio signal input
IC501 Pin7 from C473(L-CH) IC501 Pin7 from C473(L-CH)
IC501 Pin11 from C478(R-CH) IC501 Pin11 from C478(R-CH)
IC502 Pin11 from C491(C-CH) IC502 Pin11 from C491(C-CH)
IC503 Pin7 from C483(SL-CH) IC503 Pin7 from C483(SL-CH)
IC503 Pin11 from C487(SR-CH) IC503 Pin11 from C487(SR-CH)
From C495 to subwoofer output From C495 to subwoofer output
No
Check IC408
Audio signal output Audio signal output
Pin31 to C471(L-CH) Pin31 to C471(L-CH)
Pin32 to C476(R-CH) Pin32 to C476(R-CH)
Pin33 to C489(C-CH) Pin33 to C489(C-CH)
Pin34 to C481(SL-CH) Pin34 to C481(SL-CH)
Pin35 to C485(SR-CH) Pin35 to C485(SR-CH)
Pin36 to C493(Subwoofer) Pin36 to C493(Subwoofer)
No
Check IC408
Check IC408 data
Power supply
Pin39 from RB102 Pin26(CE)
Ok Ok
Pin40 from RB102 Pin14(data) Pin30=(-7V) Pin30=(-7V)
Pin41 from RB102 Pin24(clk) Pin5=(+7V) Pin5=(+7V)
No
Check Mpeg BD section
Change
Change IC408
Between IC6(CPU) to IC2,IC3
R466 or R467
to CN102 circuit
At aux/TV, tuner mode
(Surround mode)
Yes Yes
Check Ic405 Ic406
Audio Signal input Audio Signal input
IC405 Pin12=P/L IC405 Pin12=P/L Pin2=P/R Pin2=P/R Pin5=P/C Pin5=P/C
IC406 Pin2=P/SR Pin12=P/SL IC406 Pin2=P/SR Pin12=P/SL
Pin5=P/subwoofer Pin5=P/subwoofer
No No
Check Surround BD CN601
No
Power Suply:
Repair power Supply circuit
Pin13=(+12V) Pin14=(-12V)
Yes Yes
Check Surround BD 6CH mode
Repair
Control voltage Pin9=(0v) Control voltage Pin9=(0v)
Yes
Between CN601 to
RB601 Audio Signal output RB601 Audio Signal output
IC405,IC406 circuit Pin6=C Pin6=C
Pin4=R Pin4=R Pin5=L Pin5=L
Pin7=SR Pin7=SR Pin10=SL Pin10=SL
No
Check surround BD CN601 Check surround BD CN601
Repair
Yes Audio Signal input Audio Signal input
Surround BD circuit Pin2=L/CH Pin2=L/CH
Pin3=R/CH Pin3=R/CH
No
Repair
At aux/TV, tuner mode
Between IC402 to CN601 Yes Check Ic401
Pin2 and Pin3 circuit Audio signal output Audio signal output
Pin13 to C412 = L/Ch Pin13 to C412 = L/Ch
And power supply circuit
Pin3 to C416 = R/CH Pin3 to C416 = R/CH
2-3
Check volume control IC408
Audio signal input
Pin15 from C437(L-CH) Pin15 from C437(L-CH)
Yes
Pin13 from C438(R-CH) Pin13 from C438(R-CH)
Pin11 from C439(C-CH) Pin11 from C439(C-CH)
Pin9 from C440(SL-CH) Pin9 from C440(SL-CH)
Pin8 from C441(SR-CH) Pin8 from C441(SR-CH)
Pin6 from C442(Subwoofer) Pin6 from C442(Subwoofer)
No
Check IC405. IC406
No
Repair IC405,IC406
Power Supply
Power supply Circuit
Pin16(VCC)=+7V
PIN7(VEE)=-7v
No
Yes
Check IC405 IC406
Switch control voltage
Between Ic405.406 Pin9.10.11 Between Ic405.406 Pin9.10.11
1: At aux/TV, tuner mode 1: At aux/TV, tuner mode
No
(Surround mode) (Surround mode)
To Ic408 Pin2 Circuit or
Ic405 Ic406 Pin9.10.11 = (0V) Ic405 Ic406 Pin9.10.11 = (0V)
1: At DVD dolby mode 1: At DVD dolby mode
(5.1 CH mode) (5.1 CH mode)
Ic405 Ic406 Pin9.10.11 = (+5V)
At DVD AC3 Dolbly Digital Mode At DVD AC3 Dolbly Digital Mode
Check IC405,IC406 Check IC405,IC406
Yes Yes
Audio Signal input Audio Signal input
IC405 Pin13=D/L Pin1=D/R
IC405 Pin13=D/L
IC406 Pin13=D/SR IC406 Pin13=D/SR
Pin3=D/subwoofer Pin3=D/subwoofer
Change IC405 , IC406
No
Check IC401 power supply
No
Pin16(VDD)=+7V Pin16(VDD)=+7V Power Supply circuit
Pin7(VEE)=-7V Pin7(VEE)=-7V
Yes
Check IC401Pin9 and Pin10
Switch control voltage Switch control voltage
No
Pin10=(A) Pin10=(A) Pin9=(B) Pin9=(B)
(Pin10=0V, Pin9=0V) for TV mode (Pin10=0V, Pin9=0V) for TV mode
(Pin10=+5V, Pin9=0V) for aux mode (Pin10=+5V, Pin9=0V) for aux mode
(Pin10=+5V, Pin9=+5V) for tuner mode
(Pin10=0V, Pin9=+5V) for DVD line out (Pin10=0V, Pin9=+5V) for DVD line out
Yes
Change Ic401
Repair
IC408 Circuit
Pin1=D/R Pin3=D/C Pin3=D/C
Pin1=D/SL Pin1=D/SL
No
See (D)
Repair chart
Repair Repair
Repair
Between IC401 Pin9,10 to
IC408 Pin3,4 Circuit or
IC408 Circuit