SECTION 6.0 - TROUBLESHOOTING
(FOR QUALIFIED SERVICE PERSONNEL ONLY)
DANGER! NEVER ATTEMPT TO PERFORM
REPAIRS IF THIS INSTRUMENT IS
PLUGGED IN! TO AVOID SERIOUS ELEC-
TRIC SHOCK OR ELECTROCUTION, THIS
INSTRUMENT MUST BE DISCONNECTED
FROM THE SOURCE OF AC POWER BEFORE
REMOVAL OF ANY PROTECTIVE COVERS.
Unit will not operate;
Cause:
Fuse blown.
Remedy:
Replace fuse with proper size and type.
(See fuse replacement).
Cause:
Supply voltage low or at zero.
Remedy:
Check house receptacle with a voltmeter.
Cause:
On/Off power switch in "off' position.
Remedy:
Switch power switch to "on" position.
Motor runs but roller(s) will not turn;
Cause:
Drive and/or deck gear pulley(s) loose.
Remedy:
Tighten gear pulley(s) with allen wrench.
Cause:
Belt(s) worn or broken.
Remedy:
Replace defective belts.
Switch on but motor fails to rotate;
Cause:
Speed control set too low.
Remedy:
Increase motor speed as required.
Cause:
Motor control board defective.
Remedy:
Replace defective board.
Switch on but motor fails to rotate;
Cause:
Drive motor defective.
Remedy:
Replace defective motor.
Motor fails to maintain constant rotation speed;
Cause:
Motor control board defective.
Remedy:
Replace defective board.
Cause:
Drive motor defective.
Remedy:
Replace defective motor.
Cause:
Line voltage varying by more than ±10%.
Remedy:
Have mains checked by qualified electrician.
6.1 MOTOR REPLACEMENT (SEE FIGS. A and B)
1. Unplug unit from the power source.
2. Remove the screws that secure the cover to the control
housing and remove cover.
3. Locate and unplug the red and black motor leads.
4. Loosen the four screws which secure the motor to the
control housing. Do not remove screws.
5. Remove the drive belts from the motor drive gears.
6. Using a 3/32" Allen wrench, loosen the set screws secur-
ing the drive gears to the motor shaft (two per gear),
then remove the gears.
7. Remove the four screws that were loosened in Step four.
8. Carefully remove the motor from the base unit.
9. For reassembly, reverse the above procedure using the
new motor.
Model 4862 Cell Roller____________________________________________________________________Troubleshooting
6 - 1
Содержание 4862
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