Service manual

CONFIDENTIAL – DO NOT COPY
Page10-17
File No. SG-0174
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 syncÎR419
H syncÎR420
clockÎR421
No
Check +3.3V_SWÎ
FB19,FB20,FB21,FB22
U41Î+1.8V_HDMI1
Check Q44
sourceÎhigh(3.3V)
Check crystalÎ
Y2=28.322MHz
Yes
No
Check input source?
Yes
Yes
Check U35 I2C busÎ
CSDAÎpin 39
CSCLÎpin 40
No
Check Q44
GataÎhigh(5V)
No
Q44 fail
Yes
Check U35 all power U35 fail
Yes
I2C addr.ÎR424
No
Check Block 2
No
No
Check U35’s RGB data bus
BÎRP10,RP11
GÎRP12,RP14
RÎRP16,RP17
Check U37 I2C bus
SCLÎPin 6
SDAÎpin 5
Yes
No
Check U37 power
5VÎPin 8
No
Check D66 and D65
Are there 5V output?
No
D66 fail
or
D65 fail
Is picture on screen?
No