PAT EI65 Troubleshooting Handbook page 10

EI65 TROUBLESHOOTING HANDBOOK
3.2 ANTI TWO BLOCK PROBLEM - continued
Continued from previous page.
With power off, measure the A2B signal in the console at the X1:9 and X1:10.
With the switch weight in position the ohm meter reads 4.7K ohms.
Refer to Drawing 4, Anti-Two Block Circuit, Section 5. Drawings.
Correct?
If the Anti-Two Block condition exists replace connection board.
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Fault in cable assembly. Check cable assemblies
No
Refer to Drawing 1, System Diagram, Section 5. Drawings.
Yes
With power on and the switch weight in position,
A2B relay defective on connection board.
Refer to Drawing 1 & 2, Section 5. Drawings..
and replace defective cable.
Yes
End
031-300-190-035 REVISION A 01/25/99
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