Call for service E7-90
Content - ICU communication trouble (PCU
detection)
Detail - Communication setup
error/framing/parity/protocol error
Cause - Slave unit PWB connector improper
connection
Slave unit PWB - ICU PWB harness
trouble
Slave unit PWB mother board connector
pin breakage
Check and remedy
Check the slave unit PWB and the ICU
PWB connector connection.
Check the copier earth
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