KX-NTV150NE - Panasonic PBX Service Manual (repair manual). Page 12

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12
KX-NTV150 Series  
7.6.
Fail upgrading firmware
1. Check if Main Board PCB’A _U1 is damage.
*U1-(SOC, VVTK8112, VATICS)
Malfunction
Main Board exchange.
U1 
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