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15. LCD problem
Y
Check U507,J2
LCD
N
CRT can display?
Y
Check U507
N
Backlight ON?
Y
Check U507
N
+3V_LCD = 3.3V?
+5V_LCD = 5V?
Y
FPVDDEN = high?
Y
+12V_LCD = 12V?
N
Check
D8,R248,R43,C38,Q6,R33,Q7,
R38,C33,Q5,R23,Q4,C26,Q3
N
+12V = 12V?
VPP problem
Y
Y
FPVDDEN = high?
N
Check
R22,D9,R9,C20,Q1,Q2,R10
Check U507
N
Check U507
16. CRT problem
15/30
LCD can display?
N
Detect CRT?
Check
D5,D7,J501,J503,Q3,Q4,
R7,R8,L4,L5
HSYNC(J1 13pin)
VSYNC(J1 14PIN)
RGB correct?
Check U507
CRT
N
Y
LCD problem
Y
N
OK?
Y
Check
J501,J503,Q1,Q2,L506,
FA502,U507
N
Y
Check
U507,RP2,CP1,J501,J503,
RP501,CP501,FA502
16/30
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