Philips QCS1.0S Service Manual page 15

5.2.2 Repair flow chart
Not OK
Check CN2
pin10 > 2V?
OK
Check cable
connection between
PWB and Panel
OK, Well
connection
Service Modes, Error Codes, and Fault Finding
No Image appear
LED Bright ?
OK
Orange
Check LED status
Green
Not OK
Check CN7
pin1 > 3.3V?
Check CN7
pin9/20=12V?,
CN2 pin7/8
=24V?
Not OK
Check LCD
Back Light
Disconnected the
Signal cable, Is
the screen show
"No Signal"?
Check CN1(MB)
cable connection
Replace Main
board
Not OK
OK
Not OK
Check CN2 cable
connection
OK
Replace Power
board
OK
NG
Connected the Signal
cable again,
Check Image
OK, Well
connection
QCS1.0S LA 5.
Check CN7 pin6 = 5 V?
Not OK
Check cable from
CN7(MB) connection
OK, Well
connection
Check Power
Board AC power
OK
Not OK
Check P1(PWB)
connection
OK
Not OK
END
I_17540_042.eps
EN 15
OK
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