Hi,
I am trying to revive an old UPS. It has 2 types of outlets. Surge Outlets providing just surge protection and battery outlets which provides the UPS shut down functionality in case of a power out. Surge outlets are working fine but battery outlets are not providing any power. (It was working fine until I shut the unit done). Replacing the batteries does not resolve the problem. Also not a fuse problem
As the unit is at least some 15 years I thought as a first trouble shooting step I will replace all the capacitors. The caps involved comprises of regular electrolytics and SMD V-chips. I am confused by the specs of these V chips and should be grateful for assistance.
They are only marked on the top, over 3 lines. Examples are:
4.7
25S
B13
22
16S
H92
10
35S
H23
I assume the first line denotes the capacitance, the second the voltage and the third the batch. So for the first example above, the values are 4.7uF, 25 Volts (no idea what the S is for, manufacturer perhaps), batch B13. The alternative is these markings needs to be referenced to some sort of conversion table for the actual specs.
I have searched the web extensively but with no joy and any help would be much appreciated.
Thanks
I am trying to revive an old UPS. It has 2 types of outlets. Surge Outlets providing just surge protection and battery outlets which provides the UPS shut down functionality in case of a power out. Surge outlets are working fine but battery outlets are not providing any power. (It was working fine until I shut the unit done). Replacing the batteries does not resolve the problem. Also not a fuse problem
As the unit is at least some 15 years I thought as a first trouble shooting step I will replace all the capacitors. The caps involved comprises of regular electrolytics and SMD V-chips. I am confused by the specs of these V chips and should be grateful for assistance.
They are only marked on the top, over 3 lines. Examples are:
4.7
25S
B13
22
16S
H92
10
35S
H23
I assume the first line denotes the capacitance, the second the voltage and the third the batch. So for the first example above, the values are 4.7uF, 25 Volts (no idea what the S is for, manufacturer perhaps), batch B13. The alternative is these markings needs to be referenced to some sort of conversion table for the actual specs.
I have searched the web extensively but with no joy and any help would be much appreciated.
Thanks
