Panasonic EY6506-U1 4 TROUBLESHOOTING GUIDE

EY6506-U1

4 TROUBLESHOOTING GUIDE

(Refer to WIRING CONNECTION DIAGRAM)

< TROUBLE >			< CHECK >		< REMEDY >
Does not operate.			<CHECK BATTERY PACK.>	NO	Replace battery pack.
	→ If no less than 12V DC is available across the (+) and (-) terminals,			→
		the battery pack is OK.
		NOTE:	The battery pack is sold separately as an optional accessory.
			See the nearest sales dealer for details. The battery pack has a
			limited life.
			The pack should be replaced if;

-after being charged for the rated charging time the battery voltage is less than 12V DC or the usable time is extremely short.

-the battery leaks. Check battery for leaks and terminals for corrosion.

↓OK

<CHECK TERMINAL CONNECTIONS BETWEEN MAIN UNIT		NO	Repair contacts.
	AND BATTERY PACK.>	→
Check for proper terminal contacts.
	↓ OK
		NO
	<CHECK SWITCH BLOCK.>		Contacts in switch block
	(See WIRING CONNECTION DIAGRAM.)	→	are defective.
Check continuity between following terminals.			Replace switch & FET
* Inspection of the forward / reverse selection switch.			block.
When switch handle is depressed all the way:
-	There should be 0Ω between (A) - (D) , and between (B) - (C) ;
	when switch lever is set to forward side.
-	There should be 0Ω between (A) - (C) , and between (B) - (D) ;
	when switch lever is set to reverse side.
* Inspection of the brake.
When switch handle is not depressed:
-	There should be 0Ω between (A) - (B) .
	↓ OK
		NO
	<CHECK MOTOR BRUSH.>		Replace motor
A. Check the condition of carbon brush.		→	brush assembly.
(Do not touch between brush holder and holding spring.)
B. There should be 0Ω between motor lead wire and
terminal of brush holder.
	↓ OK
		NO
	<CHECK MOTOR ROTOR.>		Replace motor
Check the condition of rotor if there is any wear, crack and deformation.		→	rotor assembly.
	↓ OK
		NO
	<CHECK MOTOR STATOR.>		Replace motor
Check the condition of motor case if there is any crack and deformation.		→	stator.

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