Philips MC-D370/22 Service Manual page 14

2-2
MC-D370 REPAIR INSTRUCTIONS (1 of 2)
A
All Function
No Working
Check All System Yes RE-insert and fix
All cable is loose the cable
or bad INT
No
Not Check Back power PCB Bad
Panel stand LED show
F904 Bad Cause Damage
Working or Not
Ok
Check power pcb CN907 16pin No
5V if Right
Yes
Check Repair
Control PCB IC206
circuit
Work
Check Repair
Check IC902 IC903 Pin3=(5V) No
Switch Power Supply
Check IC114 Pin3=(3.3V)
Circuit (See B)
Correct
Check All Voltage 3.3V
and 5V give Circuit
B
Power Supply +5V Voltage
No Working
No Output
All Voltage No +12V -12V Voltage
No Output No Output
Yes
Check F904 +8 V Voltage
Bad Cause Damage
No Output
+20V -20V Voltage
No Output
No
Check RL901 No
Check RL901
Working or Not
and its conn circuti
Yes
Check F902 F903 F9041
F905 F906 F909
A B
All Function Power Supply
No Working No Working
Change F904
Repair Between
T901 to CN907
Circuit
Check D905 D912 and
its conjoint part
D
Check D901 D902 D903 D904 DVD Audio
No Sound
and its conjoint part
Check CN706 and
CN102 to DVD loader
Check D913 D914 and
Cable loose or bad INT
its conjoint part
Check IC106 IC400
Check D911 and Circuit affirm Correct
its conjoint part
Check Repair in
DVD Serve PCB Part
MAIN UNIT REPAIR CHART
C E
D F
Audio Output DVD Audio Aux in Tuner
No Sound No Output No Sound No Output
C
Audio Output
No Sound
Yes
Check CN907 and No Check IC501
its conjoint part
Pin1,3,6 Voltage=+20V -20V
Yes
Check Repair in +12V -12V
No Check IC403,IC404,IC405,
their Voltage
net its conjoint part
Correct is +12V -12V
Yes
Check +5v No Check IC400
Pin14 Voltage
its conjoint part
Correct is +5V
Yes RE-insert and fix
the cable
No
No
Repair in IC106 IC400 Circuit
Yes
2-2
G H I
J
Ear Head Phone Audio Line Subwoofer Line Digital Line
No Sound No Output No Output No Output
Yes
Check IC106 circuit
E
Aux in
No Sound
Check JK401
loose or bad INT
No
Check IC406 Pin16=+7v Check +7v and -7v
No
Pin7=-7v
give Circuit
affirm Correct
Yes
Check Repair Between
IC406 to JK401 Circuit