
Chapter 2: Troubleshooting 11
MICR
Assembly
Positioning
Boss
Silicone
Fluid
Silicone
Fluid
Push
Read Head
Caution: When replacing the read head assembly, make sure that the
cantilever mounting area contains a third locating hole for the
positioning boss. This positioning boss was added to newer read head
assemblies. If the locating hole is not present in the cantilever (as was
the case for early models of the 7156), cut off and completely remove
all remnants of the boss protrusion on the lower-left corner of the
replacement read head bracket. The positioning boss is shown in the
illustration above.
• If the test result continues to indicate a catastrophic read failure,
reconnect the buck coil lead and continue checking the following
conditions to determine the cause of the problem.
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