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6300/6310 Treadmill Electronics Repair Manual – Testing
Thermal Fuse Operation
Display Board
Drive Board
Motor
Thermal Fuse
Signal
CLK
Thermal Fuse
Thermal Fuse
Signal
THERMAL FUSE.02
1. When the motor temperature gets too high, the thermal fuse “breaks,” cutting continuity to the thermal
fuse circuit.
2. The break in continuity serves as a signal, which travels to the drive board then to the display.
3. The display main program IC reacts: “Service required” indicator lights on the display. On later units,
the motor is shut off too. For details, see above right.
Design Change Implementation
Model, Date, IC, Serial Number
6300, 03/30/04, M63T-4B, 0077981;
6310, 04/27/04, B631H-4B, 0078117;
6320, 0091593, B632H-4B, 0091593;
Information above marks the start of a
thermal fuse operation design change.
Before the change, the “Service
Required” would light on the display
after the thermal fuse was tripped.
After the change, the motor would be
shut down as well so the unit could not
be used.