Here we are selling a brand-new Schadow SDU3P power switch. This is a switch of extremely reliable quality. According to conservative estimates, this switch can withstand 8,000 cycles of operation.  We also considerately provide you with two dedicated mounting brackets for the switch. The hole pitch of one of them is 20 millimeters, and the hole pitch of the other is 25 millimeters. You just need to measure the hole pitch of the dedicated mounting bracket of the machine first. In this way, it will greatly facilitate your installation. You just need to align the hole pitch of the installation with the groove of the switch and insert it, and then press the four feet firmly to complete the installation.
This switch is an ideal substitute for some old-fashioned NAD, Realistic, Marantz, Concept, and Sanyo devices from the 1970s and 1980s. It will replace the power switch in the Sanyo Plus 35, Plus 55, Plus C20, Plus C55, JCX-2600K, and Sanyo JCX-2900K, as well as the Sansui A-5, A-7, A-9, AU-X1, 3900Z, 4900Z, 5900Z, the Carver C-1 and C-4000, the Realistic STA-2100D and STA-2200, and the NAD 1020, 3020, 3020A, 3060, 3120, 3140, 3150, 7020PE, and 7220PE.
If the appearance of your old switch is almost the same as that of this new switch, then it is highly likely to be the correct power switch suitable for your device. On the contrary, if the appearance of the old switch is quite different from this new switch, then this may not be the right choice.
The operation of replacing the switch involves the processes of soldering and testing. If you choose to replace it by yourself (DIY), make sure to unplug the power switch plug before performing any form of electrical work. Before disassembling the old switch, it is recommended that you take more photos of the old switch mounting bracket and the connection of the wires. These photos will be of great help for your subsequent installation of the replacement switch.