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Intermittent Problems
Intermittent problems are typically caused by open circuits, resulting from a cold solder
joint, contamination (dirt, oil, oxide, etc.) on a connector pad, a loose connection, broken
street from a sharp fold in a flex, or a partially seated connector.
For intermittent failures involving the Ranging and LCD Boards, Figure 4-3 shows initial
“quick check” tests.
Figure 4-3. Initial test procedure for ranging board and LCD board
Check Continuity:
Ranging Module to Rest of Camera
Loosen & Retighten Screws
Retest
Remove LCD Board and Elastomer
• Inspect Gold Fingers & Elastomer
• Check Finger Alignment: LCD to
Ranging Module
• Attach Known Good LCD and
Connector. Retest Camera.
LCD to Ranging Module
Continuity Check
Original LCD or Connector
failure:
• Change LCD Board & retest
• Change elastomer & retest.
• Lift Ranging Module: Check
Continuity
• Examine Burndy Connectors for
Cold Solder Joints & Shorts.
• Analyze Rest of Camera.
Good
Bad
Good
Good
Bad
Bad
Bad
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