Philips LX3000D Service Manual page 11

REPAIR INSTRUCTIONS
Tuner No Output
Check RB101
Check to tuner
No
Pin12=5V
Power supply Power supply
Pin11=12V
No
Check Q910/Q911/Q912
Check IC152 Data
From Main BD
Yes
Change
Q910 or Q911 or Q912 Q910 or Q911 or Q912
Yes
Check Mai n BD RB102 Check Mai n BD RB102
Cable loose or bad INT Cable loose or bad INT
YES
Check
IC152 Pin15=5V RE-Insert and fix
Between Main BD CN101 Between Main BD CN101
the cable
IC101 Pin8=12V
to RB102 Circuit to RB102 Circuit
No
Change Check Mpeg BD CPU IC6 Check Mpeg BD CPU IC6
L153 or L154/L104
And IC2/IC3 Bad Cause Damage And IC2/IC3 Bad Cause Damage
2-5
F
Yes
Yes Yes
Check tuner VT
From RB101 From RB101
From C161 From C161
Yes
Yes Yes
Pin3/CE
Low frequency=1.5-2.0V
No AM function
Pin4/DI
Higt frequency=8.0-9.0V
Pin5/CL
Pin6/DO
VT No Change
No
Check IC152 osc input
Pin13/AM input
Pin14/FM input Pin14/FM input
No
Check IC152 or Check IC152 or
Check
VT section Circuit
No
No
A: Repair Am osc section (T003) or
(Between IC101 Pin30 to IC152 Pin13 circuit)
B: Repair Fm osc section
(Between EF001 Pin8 to IC152 Pin14 circuit)
No FM function
Check tuner pack EF001
No
Power supply
Pin6=12V Pin6=12V
Yes
Check FM IF output Check FM IF output
No
Check AM IF T102/CF103
Q101/Q102
Yes
Check T105 Check T105
OK
OK OK
Yes
Check IC101 audio output
No
IC101 Pin16 to RB101 Pin13 (R-CH) IC101 Pin16 to RB101 Pin13 (R-CH)
IC101 Pin17 to RB101 Pin15 (L-CH) IC101 Pin17 to RB101 Pin15 (L-CH)
Yes
Repair tuner signal input circuit
(From Main BD) (From Main BD)
CN101 Pin13 to IC401 Pin4 (R-CH) CN101 Pin13 to IC401 Pin4 (R-CH)
CN101 Pin15 to IC401 Pin11 (L-CH) CN101 Pin15 to IC401 Pin11 (L-CH)
2-5
EAR Head Phone
Yes
Ear head phone BD RB301 Ear head phone BD RB301
Cnange Q103/Q104
Check Q103/Q104 Check Q103/Q104
To main BD CN301 To main BD CN301
Cable loose or bad INT Cable loose or bad INT
REpair FM IF section: REpair FM IF section: Ear head phone BD RB301 Ear head phone BD RB301
To main BD CN301 To main BD CN301
Between EF001 to Q101/Q102
to IC101 Pin1 circuit
Ear head phone BD Ear head phone BD
REpair FM IF section: REpair FM IF section:
Between EF001 to Q101/Q102 Between EF001 to Q101/Q102
Audio signal input Audio signal input
to IC101 Pin1 circuit
Pin6 from RB301 Pin4=(L/CH)
Pin7 from RB301 Pin5=(R/CH) Pin7 from RB301 Pin5=(R/CH)
Audio signal output Audio signal output
Pin3 to FB301=(L/CH) Pin3 to FB301=(L/CH)
Pin1 to FB302=(R/CH) Pin1 to FB302=(R/CH)
Change phone jack Change phone jack
G
No Sound
Check
RE-Insert and fix
Yes
the cable the cable
No
Check
Repair Power Supply Repair Power Supply
No No
Circuit
(From main BD) (From main BD)
Pin6=(+12V) Pin6=(+12V)
Yes
Check
No No
Repair Power Supply Repair Power Supply
IC304
(Q308) Circuit (Q308) Circuit
Pin2=(+6V)
Yes
Check IC304
Repair main BD
No No
Between R472, R478 Between R472, R478
to CN301 circuit
Yes
Check IC304
No No
Change IC304
Yes
JK301