Philips MRD300/37 Service Manual page 9

REPAIR INSTRUCTIONS
BAD
CHECK JK301 OK
CHAGE JK301
CHECK
BAD
ZD300~ZD309 CN300 CHECK L300~L304
CHECK IC100 AND
ITS AROUND PART
Can't OPEN CLES
CHECK CN802 TO
BAD
RE-INSERT AND FIX
DVD LOADER CABLE
THE CABLE
LOOSEOR BAD INT
CHECK IC801 pin1,pin7 CHECK CN802 pin1,2
NO
is HI or LO is HI or LO
NO YES
CHECK CHECK OPEN-M
CHECK IC801/pin4,5
CN802
YES
CHECK IC803 pin20,21 (11.0582MHz)
2-3
C
DVD
NO SOUND
DVD
NO VIDEO
NO
RE-INSERT AND FIX
OR BAD THE CABLE
OK
CHECK
NO
IC900/IC903/IC901
IC905
0K
CHECK IC800
YES
YES
CHECK IC800 pin4,5
is HI or LO
YES
CHECK SPIN-M
SLED-M IS RUN
CHECK pickup if light up
DVD
SHECK CN805 PIN1
NO READING
RF OUT
pin2,5,6,7,9,10,11,12
CHECK CN805 CN806
check IC100 OF IC804
TO DVD LOADER CABLE
TO CN805
LOOSEOR BAD INT
YES
CHECK IC900 pin3=8V
IC903 IC901 pin1=5V
IC905 pin3=3.3V
YES
The disc changer can't run
CHECK CN803
RE-INSERT AND FIX BAD
DVD LOADER CABLE
THE CABLE
LOOSEOR BAD INT
YES
CHECK IC800 pin1,pin7 CHECK CN803 pin1,2
NO NO
is HI or LO is HI or LO
YES
YES
CHECK CN803 CHECK OPEN-M
CIRCUIT
2-3
NO CHECK IC805 OK
CIRCUIT
YES
CHECK Q808 Q807
NO OK
Q803,Q804 TO CN805
CIRCUIT
OK
NO
CHECK LOADER
CN805
OK
CIRCUIT
RE-INSERT AND FIX
BAD
THE CABLE
CHECK IC802 pin1,pin7
NO
is HI or LO
YES
CHECK
CHECK IC802/pin4,5
CN802
YES
CHECK LOADER
CHECK LOADER
Can't LOAD UP DOWIN
CHECK CN804 TO
DVD LOADER CABLE
LOOSEOR BAD INT
YES
CHECK CN804 pin1,2
is HI or LO
YES
loda up down-M