Repair Instructions - Philips MCD139 Service Manual

REPAIR INSTRUCTION
A
All Function No
Work ing
Check all system all cable RE-insert and fix
YES
is loose or bad INT the cable
NO
Panel stand LED whether Check SW power
NOT Bad
light +5V out
OK
Din cable is loose
YES
or bad INT
YES
NO
Check CN3 and
control board
Check Q7 Q8 out + .5V Check Repair Q3 2 Q7
NO
+3.3V whether correct Q8 and conjoint part
Correct
Check MA IN PCB IC9
IC IC 3 IC 5
2-1
A
All Function No
Work ing
B
All Function No
Sound
Check RB5 Pin
NO
whether at +24V
YES
Check IC9 and Check Q5 PinC
NO
conjoint part whether at 5V
YES
RE-insert and fix Check IC5 IC5 2
the cabl e IC5 3 IC5 4 IC5 5
E
Aux In No Sound
Check U3 Pin 9 Pin24
NO
whether at 3.3V
YES
Check U3 and conjoint
part
MAIN UNIT REPAIR CHART
B C D
All Function No Audio Li ne Out Coaxial Out No
Sound No Ouput Sound
C
Audio Li ne Out
No Ouput
Check SW power IC9 DVD Function SP K
and conjoint part whether output
YES
Check IC5 and conjoint Check Q2 Q23 PinB
part whether at .7V
NO
Check IC2 and conjoint
part
F
Tuner Function
No Sound
Check FB9 Check U3 Pin 9 Pin24
whether at 3.3V
YES
Check CN3 Pin5
whether at 2V
YES
Check IC3 and TUNER
2-1
E F
Aux In No Sound Tuner Function
No Sound
D
Coaxial Out No
Sound
Check IC 3 Check IC8 Pin 4 whether
NO
at 5V
YES
Check Q 9 and conjoint Check IC8 and conjoint
YES
part part
Check FB9
NO
Check T3 and conjoint
NO
part
Check FB47
NO