Agilent Technologies DP111 Dokumentacja Strona 206

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CEX-Bus Interconnection Unit - BC810 Section 5 Maintenance
206 3BSE036351-510 A
CEX-Bus Interconnection Unit - BC810
Table 28. BC810 – Fault-Finding Procedure
Fault Possible Cause and Corrective Action
Fault LED is ON No 3.3 V caused by internal short circuit or
overvoltage from power supply
Check external 24 V voltage with voltmeter.
Send unit for repair.
Run LED is OFF Hardware error.
Send unit for repair.
Internal fuse blown (BC810)
External fuse blown (TP857)
EPOK LED is OFF when
external power is connected
Hardware error.
External fuse blown (TP857)
Send unit for repair.
C1 or C2 LED OFF despite
accessing CEX-units
CEX-Bus units using no interrupt (for example
CI851), no action is needed.
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