FS21iMB - Operator Panel IO PCB

[M.RISHIKESH]

Dear Experts

We have a VMC & in that 24VDC power supply was dropping down (LED on SMPS was getting OFF)
There are two Operator panel IO PCBs ( A20B-2002-0520 AND A20B-2002-0521)
Pin number A1 is M (ie Minus of Power Supply), B1 is 2L+ (Ie positive polarity of power supply), A24,A25, B24,B25 are 1L+

In A20B-2002-0521, resistance between A1,B1 is 246 ohms, A1- A25 is 0 ohms and A1-B25 = 0 ohms, due to 0 ohms, we are suspecting, this IO PCB got short and need replacement with new one

A20B-2002-0520, resistance between A1,B1 is 2465 ohms, A1- A25 is infinity ohms and A1-B3 = infinity ohms

Please comment

Regards

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[phucrobusl]

okay i will check for you pm me rd181993@gmail.com

[M.RISHIKESH]

Thanks
We replaced IO PCB A20B-2002-0521 and could fix the problem
Regards