Never skip this section. It outlines the Personal Protective
Modern industrial units communicate status via LED indicators or error codes. A blinking red light on the FH-MT410-B might mean a hardware fault, or it might simply mean a configuration error. The service manual contains the definitive decoder for these signals. Without it, troubleshooting becomes a game of chance rather than a systematic process.
Place the internal spacer back on the axle. Slide the freehub body onto the hub, turning it counter-clockwise to help the pawls engage. fh-mt410-b service manual
| Symptom | Possible Cause | Check Point | |---------|----------------|--------------| | No power | Fuse F1 open | Check continuity, replace with 10A | | No sound | Amp IC shorted | Measure between pin 4 and 12 of TDA7388 | | Bluetooth not found | Antenna disconnected | Verify antenna clip on PCB |
Check LCD backlight inverter. Backlight enable signal from main microcontroller. Fix: Replace 2–4 SMD LEDs on the side of the LCD panel. Part number in BOM: CL-425G. Re-solder ribbon cable. Never skip this section
: The right-side cap should be pulled outward and never unthreaded or subjected to angular loads, as this can cause damage.
Without it, even a simple fuse replacement can become a guessing game. The service manual contains the definitive decoder for
Cartridge-style (6903 in the hub shell; 6803 and 6802 in the freehub body) Required Tools & Materials
For detailed technical drawings, refer to the Shimano Dealer Manual or the Exploded View PDF .