Philips LX3000D Service Manual page 8

REPAIR INSTRUCTIONS
A
B
All Function VFD Display Audio Output
No Working No Show No Sound
And Key Function
Not
Check Back power BD
Bad
Change F981
F981 Bad Cause Damage
OK
No
Check CN203 Yes
Pin3=(+5V)
No
Repair
Between T981 to IC982
Circuit
Check Repair
Control BD IC981
circuit
2-2
MAIN UNIT REPAIR CHART
F
C D E G
DVD Audio Aux/TV Tuner Ear Head Phone
No Output No Output No Output No Sound
A
All function
No Working
Check All System
Yes RE-Insert and fix
All cable is loose
the cable
or bad INT
No
Panel stanby LED show
Working or Not
Work
Check Main BD fuse F903
Bad
Change F903
Bad Cause Damage
OK
Check back power BD
Systm power control
CN203 Pin1 =(+ 5V)
Change T901
Yes
Bad
Check main BD
No
Check T901
IC903 Pin3 to
Bad Cause Damage
RB900 Pin1,3 = 5V
Ok
Change IC903
Yes
Check Mpeg BD section
All power supply Repair Mpeg BD section
No
All power supply circuit
All VCC=(+5V)
All VCC33=(+3.3V)
Yes
Check Mpeg BD
IC6(CPU) Pin24(Reset) and
Pin49(OSC frequency 27MHz)
Yes
Repair Mpeg BD
Between IC6(CPU) to
IC1,IC7,IC9 circuit
J K
H I
Audio Line Center Line Subwoofer Line Digital Line
No Output No Output No Output No Output
Check +5V
Check Test CN201
Pin7 No +5V
Power Supply Circuit
Pin9.11=AC1.2V
No
Check T901 CN904
And Fuse Resistor
R925. R926. R927
Power Supply Circuit
2-2
B
VFD Display
No Show
And Key Function
Check Control BD CN205
Yes RE-Insert and fix
And Standby BD RB202
the cable
Cable loose or bad INT
No
Check Control BD CN205 Pin6
No Check Back Power Bd
And Standby BD RB202 Pin3
Power Supply Circuit
Yes Or No (+5V)
Yes
Check Main BD CN201
Yes RE-Insert and fix
And CN904
the cable
Cable loose or bad INT
No
Check Test CN201 Data From
Pin7=+5V Mpeg BD CPU To RB102 Cable
No Data
Pin8=-26V Pin4/CE
Pin5/CLOCK
Pin6/DATA
Pin10=AC0V
Yes Yes
Check VFD Control BD Section Bad Cause Damage
Check RB102
Yes RE-Insert and fix
Cable loose or bad INT
the cable
No
Check Mpeg BD IC6(CPU)
And IC2 Bad Cause Damage
Note: BD=Board
Main BD = LVM0189C011
MPEG BD = LFF0205C001
Surround BD = LVA0192C001
Tuner BD = LVT0187C001