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FlowChartofTroubleshooting
7-9
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7-2. LCD Working
Insert Power
NG
LCD Display
OK?
NO
YES
NO
NO
6pin in
U200(Sub)
=High?
Change U200(Sub)
YES
Check
LCD Sub B'd & LCD
YES
Back Light
OK?
NO
YES
4,5pin in U805
= High?
NO
YES
Check LCD Sub B'd &
Slide FPCB
1pin in U805
= 12V?
NO
YES
Check U805 &
neighboring circuits
Check
LCD Sub B'd & LCD
TSP
OK?
NO
When touch screen
46pininUCD501
=High?
NO
YES
Check
LCD Sub B'd,
Slide FPCB & LCD
Check 1,3,4,6 pin in ZD717 &
neighboring circuits
2pin in
U200(Sub)
=High?
NO
Check LCD Sub B'd &
Slide FPCB
YES
1pin in
U200(Sub)
=High?