Elo TouchSystems ET1587C - C. CPU Service Procedure

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f. NO VIDEO START
G2,G1,G4 BOV
Correct
Check
FBT
No
No Video
START
Yes
12V
Correct
Check
12V Supply
No
Yes
Clamp
Signal Check
Check
Clamp Circuit
No
Yes
ABL
Signal Check
Check
ABL Circuit
No
Yes
Video Input
Signal Check
Replace Video
Signal Cable
No
Yes
Check
U201
Replace
No
Yes
Video
AMP Circuit
Correct
Check
Video AMP
Circuit
No
Yes
Correct CRT
Cut-off Circuit
Check CRT
Cut-off
Circuit
No
YesYes
Yes
END