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The USB port is
marked "+" (yellow wire)
and "-" (black wire).
Note: The "+" spade lug is larger than the "-" lug
*USB operated 11.5v-12.5V nominal power IN, 5V OUT. The LED indicates there is power IN,
But does not guarantee the USB 5V out is working.
< Table of Contents
Testing USB Port
1. Power ON Mower.
2. Set DMM to measure DC Volts.
3. Connect a scrap USB cord with one end removed.
4. Measure 5V between the red and black wire
USB power indicator LED*
Measure 12V where indicated below.
If LED indicator is not on,
USB port is bad.
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Questions and answers
both blade motor controllers smoked after replacing batteries with lifepo4 batteries. are there any ways to fix this and still use lifepo4 batteries
To fix the blade motor controllers on a Ryobi Homelite RY48ZTR75/100 after they smoked from using LiFePO4 batteries:
1. Check Fuse: If a fuse is blown, replace it with the same physical size, Amperage, and Voltage rating.
2. Inspect Wiring and Connectors: Check for loose or bad connections, especially around the blade motor controllers and related wiring.
3. Test Components: Use a Digital Multi Meter (DMM) to test power, key switch, and DC-DC converter. Ensure the mower is fully charged if possible.
4. Controller Communication: Blade motor controllers have a master-slave setup. If one controller fails, both shut down. Replace the damaged controller(s) as needed.
5. Use Correct Battery: Ensure the battery used is compatible with the system’s voltage and current specifications. LiFePO4 batteries may not be suitable if they caused damage.
6. Disassembly and Inspection: Remove the instrument panel cover to access and inspect the key switch and other connections.
If the controllers are visibly damaged or not functioning after checking these steps, they likely need replacement.
This answer is automatically generated