Summary: When replacing the AC power board PAIA/PAIB on the MA5610/MA5616, if the operator
removes the power board without powering off it beforehand (removing the 220 V AC power connector
on the panel), there are potential safety hazards.
Keywords: MA5610/MA5616 PAIA PAIB AC power board security specifications
When replacing of the AC power board PAIA/PAIB on the MA5610/MA5616, the operator removes the AC
power board without powering off the board beforehand (disconnecting the 220 V AC power plug from the
Removing the power board before disconnecting the 220 V power plug from the board panel causes
potential safety hazards.
The MA5610s/MA5616s installed with the PAIA or PAIB power boards that are delivered to sites before
September 1, 2009 are affected.
The safety specifications of the H831PAIA/H831PAIB AC power boards used on the MxUs cannot fully
meet the requirements, which may produce potential safety hazards to operators who remove the power
boards without complying with safety rules.
Impact and Risk
There are potential safety hazards.
Measures and Solutions
The safety specifications of the AC power boards delivered after September 2009 have been strengthened.
Use the inspection tool to check the boards on the live network. Rectify the board with potential safety
For the inspection tool script, detailed delivery data, rectification method, contact CS coordinator Xue
Guoqiang (Employee ID: 98735) for China market and Nie Bo (Employee ID: 92548) for markets outside
Prewarning Expiration Condition
This prewarning will expire after the board check is complete.