6
SYMPTOM
PROBABLE CAUSE
CORRECTIVE ACTION
Malfunction Overlay, Button Switch or Operation
Button board
Replace Overlay, Button Switch or Operation Button board.
Display Console
Keys do not function
and unit does not
respond.
Defective MPU board
Test with substitute MPU board. Replace if necessary.
Defective MPU board
Test with substitute MPU board. Replace if necessary.
Defective Drive board
Test with substitute Drive board. Replace if necessary.
During MANUAL
program, excessive
resistance loading
occurs.
Worn or damaged wire harness
Inspect wire harness. Replace worn or damaged harness.
During MANUAL
program, resistance
variance occurs
Pedaling is too slow
Pedal faster.
Loose hardware
Verify that unit is level on the floor.
Verify that all hardware has been tightened. Apply Loctite where
necessary.
Worn bearings
Replace bearings and associated shaft.
During exercise
program, loud noise
issuing from unit
Drive Belt is too loose
Inspect Belt. Replace Belt if necessary.
Summary of Contents for M770E
Page 24: ...23 3 1 How to Replace the LCD Screen in Model M770EL Fig 3a CONSOLE POST ...
Page 25: ...24 Fig 3b CONSOLE ...
Page 33: ...32 7 Install new AUDIO INTERFACE DOWNLOAD Board 24 in reverse order ...
Page 40: ...39 4 1 Cable Connection Block Diagram 1 MPU PCB on M770EL MPU_FRONT Display MPU_BACK MAIN ...
Page 41: ...40 2 MPU PCB on M770E ...
Page 42: ...41 3 A D BOARD on M770EL ...
Page 43: ...42 4 POWER BOARD 4 1 M770EL DRIVE Board SMPS 5V LCD POWER ADAPTER 4 2 M770E DRIVE Board ...
Page 60: ...59 RCA 6A YELLOW Video Input ...
Page 69: ...68 ...