No Display - PAT EI65 Troubleshooting Handbook

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EI65 TROUBLESHOOTING HANDBOOK

3.1 NO DISPLAY

PROBLEM: Blank console display with no warning light shown.
Start
Check fuse F1 in console.
Refer to Drawing 2, Connection Board, Section 5. Drawings.
Correct? No Replace fuse (2amp/250V)
Yes
Measure crane voltage on connection board between X1:1 (+UB) and X1:3 (ground).
Refer to Drawing 1, System Diagram, Section 5. Drawings.
Check crane power supply for faulty
Correct? No
crane electric or if supply is too low.
Yes
Measure voltage on connection board between MP4 (+5.25V) and MP1 (ground).
Refer to Drawing 2, Connection Board, Section 5. Drawings.
Defect on connection board. Replace
Correct? No
console connection board.
Yes
Measure voltage to main board between MP15 (+5.25V) and MP1 (ground).
Refer to Drawing 3, Main Board, Section 5. Drawings..
Replace console main board.
031-300-190-035 REVISION A 01/25/99