WHAT ARE TRANSFORMERS - Lexmark N5 (12J0020) Print Server

Wall socket power (high voltage) is known as AC (Alternating Current). Battery power (low voltage) is known as DC (Direct Current). Transformers are electrical converters that change AC input to DC output or DC input to AC output. This is required to charge or to supply mains power for most portable devices that use batteries when not plugged in, or devices that do not have batteries but still require DC power input. Examples of such devices are laptops, phones, tablets, printers, print servers etc. A transformer for your print server is most likely a black box in line with the power cable. In this case you will need a new power cable which will include the transformer. Some transformers are within the device itself with a power socket in the back of the device. If this is the case then replacement of the transformer (or sometimes the whole device) is required depending on the price of parts, sometimes replacing the whole device is cheaper.