How to replace fuses in the Siemens PS-35 Power Supply Module

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Replacing fuses in your Siemens PS-35 Power Supply Module requires careful attention to safety and procedure. Before you begin, always ensure all power is disconnected from the system. This means removing both the battery and the AC power supply. When restoring power, reconnect the AC power first, followed by the battery. For Fuses F2 and F3 within the PS-35 module itself: To replace fuse F2, which requires part number 105-224090 (a 15A fuse rated at 250V max), carefully slide the old fuse out of its holder and snap the new fuse into place. For fuse F3, use part number 105-284845 (a 2A fuse rated at 125V max). Like F2, simply slide out the old fuse and insert the new one. If you're also addressing a fuse in the TC-30U Transfer Module, the process is slightly different. Remove the fuse by pushing it in and turning it counterclockwise. The replacement fuse here is the same as F2 in the PS-35: use part number 105-224090, a 15A fuse rated at 250V max.