Vizio P50HDTV10A, Руководство по обслуживанию

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CONFIDENTIAL – DO NOT COPY Page 9- 18
File No. SG-0219
14
PDP DISPLAY NOTHING(Digital 2 U35 with PORT B without screen)
Is picture on screen?
BLOCK 1
Is picture color ok?
Check U35 pin 90 Î high
V sync Î R419
H sync Î R420
clock Î R421
No
Check +3.3V_SW Î
FB19,FB20,FB21,FB22
U41 Î +1.8V_HDMI1
Check Q44
source Î high(3.3V)
Check crystal Î
Y2=28.322MHz
Yes
No
Check input source?
Yes
Yes
Check U35 I2C bus Î
CSDA Î pin 39
CSCL Î pin 40
No
Check Q44
Gata
Î
high(5V)
No
Q44 fail
Yes
Check U35 all power U35 fail
Yes
I2C addr. Î R424
No
Check Block 2
No
No
Check U35’s RGB data bus
B Î RP10,RP11
G Î RP12,RP14
R Î RP16,RP17
Check U37 I2C bus
SCL Î Pin 6
SDA Î pin 5
Yes
No
Check U37 power
5V Î Pin 8
No
Check D66 and D65
Are there 5V output?
No
D66 fail
or
D65 fail
Is picture on screen?
No
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