Panasonic NE1757R, NE2157R manual Technical Bulletin, Panasonic Home and Health Company

Technical Bulletin

Number: E10-2010-08

Date: September, 2010

Panasonic Home and Health Company

Home Appliance Group / Food service

Product: Commercial Mircowave Oven

Model: NE1258R NE1257R NE1757R

NE2157R

.

This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advice non-technical individuals of potential dangers in attempting to service a product.

Products powered by electricity should be serviced or repaired only by experienced professional technician. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Subject: Pro 1 Error Codes

1.Check for proper grounding before troubleshooting.

2.Use caution when servicing high voltage circuit.

3.Discharge high voltage capacitors prior to servicing.

4.When checking for continuity of the switches or the high voltage transformer, disconnect one lead wire from these parts and then check continuity with the AC plug removed. To do otherwise may result in false reading or may damage your meter.

5.Be sure to ground any static electricity charge built up in your body before handling the D.P.C. board.

6.120/208/230V AC is present in the shaded area on the power supply circuit board (Terminals of the power relay and primary circuit of the low voltage transformer). When troubleshooting be cautious of possible electrical shock hazard.

NOTE: If the unit is either dead or displays any of the error codes listed below, check the parts listed in possible cause column depending on failure indication e.g. F81, F82 in the display or no display (dead).

DISPLAY	CONDITION		POSSIBLE CAUSE (In order of probability)
		1.	Loose ground screw on the digital programmer circuit
F33	Open temperature sensor (exhaust)	2.	Loose connector CN4
		3.	Open temperature sensor (Should read 25k to 85k)
		4.	Digital programmer circuit failure
F34	Short temperature sensor (exhaust) (Rare)	1.	Digital programmer circuit failure
		2.	Temperature sensor failure
F44		1.	Shorted membrane sw itch
F01	Exhaust temperature exceeds 120° C	1. Burning food in the oven due to overcooking
F05	Memory failure	1. Digital programmer circuit failure
		1.	Right fuse open
		2.	Damaged short sw itch
No Display* (Dead)	No voltage supply to the LV transfomer	3. Shorted H.V capacitor, transformer, diode or magnetron (upper)
		4.	Shorted L.V transformer (Relay board)
		5.	Digital programmer circuit failure
	Excessive current comsumption	1.	Open primary latch sw itch
F81*		2.	Relay failure RY-3 (Relay Board)
	(upper H.V circuit)
		3.	Digital programmer circuit failure
		1.	Left fuse open
		2.	Open primary latch sw itch
F82*	Excessive current comsumption	3. Damaged short sw itch
	(lower H.V. circuit)	4. Shorted H.V capacitor, transformer, diode or magnetron (low er)
		5.	Relay failure RY-4 (Relay Board)
		6.	Digital programmer circuit failure
F86	Shorted contacts of RY-3	1.	Relay failure RY-3 (Relay Board)
		2.	Digital programmer circuit failure
F87	Shorted contacts of RY-4	1.	Relay failure RY-4 (Relay Board)
		2.	Digital programmer circuit failure

* Please see back of this page on how to troubleshoot F81/F82 error code or dead unit

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