Koblenz/Thorne Electric U-90, U-80 manual Problem, Possible Cause, Solution

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PROBLEM

PROBLEM	POSSIBLE CAUSE	SOLUTION

	1.- Not firmly plugged in.	1.- Check attachment plug.
A) Motor does not work	2.- Bad ON-OFF switch.	2.- Replace switch.
A) Motor does not work	3.- Line cord open	3.- Replace cord.
	4.- Motor open	4.- Check motor and wiring.
	5.- Fan blockage by material	5.- Remove obstruction
B) Motor works but cleaner	1.- Belt broken.	1.- Replace belt.
B) Motor works but cleaner	2.- Blockage air system.	2.- Remove obstruction.
does not pick up/has suction	3.- Fan broken.	3.- Replace fan.
	4.- Worn brush roller.	4.- Replace brush roller.
	5.- Motor slow.	5.- Check carbon brushes.
	6.- Bag full.	6.- Empty bag (or change paper bag).
C) Motor works incorrectly	1.- Worn carbon brushes.	1.- Replace brushes.
C) Motor works incorrectly	2.- Detective armature.	2.- Check spark, replace
	3.- Bad electrical connection.	3.- Check wiring.
	4.- Detective On-Off switch.	4.- Replace switch.
	1.- Ball bearing worn out..	1.- Replace
	2.- Ball bearing holder
D) Brush roll vibrates.	damaged	2.- Replace ball bearing holder.

5	DECEMBER-10

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Contents Page INDEX II.REPLACEMENT PROCEDURES I.-FINALTEST FOR PRODUCT SAFETY1.-ELECTRICTEST 2.-OPERATINGTESTIII.-TROUBLESHOOTING CHART WHEN ORDERING, DO NOT FORGET TO SPECIFYPART NUMBER DESCRIPTION MODEL NUMBER 11.-TOREPLACE YOKE ASSEMBLY 54, FIG.2 AND FIG.4POSSIBLE CAUSE PROBLEMSOLUTION AMPERES IV.-WIRINGDIAGRAM V.-ELECTRICALRATINGVOLTS DECEMBER-10DECEMBER-10 VI.- EXTERNAL PARTS UPRIGHT VACUUM CLEANER U-80FIG.1 DECEMBER-10 VII.- EXTERNAL PARTS UPRIGHT VACUUM CLEANER U-90FIG.2 EXTERNAL PARST OF PLASTIC UPRIGHT DECEMBER-10EXTERNAL PARST OF PLASTIC UPRIGHT DECEMBER-10 IX.- INTERNAL PARTS UPRIGHT VACUUM CLEANER U-80INTERNAL PARTS OF PLASTIC UPRIGHT X.-LISTINTERNAL PARTS UPRIGHT VACUUM CLEANER U-80DECEMBER-10 DECEMBER-10 XI.-INTERNALPARTS UPRIGHT VACUUM CLEANER U-90INTERNAL PARTS OF PLASTIC UPRIGHT DECEMBER-10