Panasonic NE-1757CR User Manual

© 2000 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
NE-1257R/NE-1257CR
NE-1757R/NE-1757CR
NE-2157R/NE-2157CR
NE-1258R
Commercial Microwave Oven
ORDER NO. MOD0009238C1
E10

Panasonic NE-1757CR Specifications

General

Control Type	Electronic
Turntable	Yes
Weight	36 lbs
Frequency	2450 MHz
Voltage	120 V
Finish	Stainless Steel
Type	Commercial Microwave Oven
Category	Microwave Oven
Cooking Modes	Microwave
Exterior Dimensions (W x D x H)	21 5/8" x 19 1/4" x 12 1/4"

Summary

Specifications

1 OUTLINE DIAGRAM

2 OPERATION PROCEDURE

1. Manual heating for single stage

Step-by-step guide for operating the oven in manual single-stage heating mode.

2. Manual heating for 2nd or 3rd stage

Procedure for operating the oven in manual two or three-stage heating modes.

3 MEMORY SETTING FOR SINGLE STAGE

5 MEMORY PAD HEATING

4 MEMORY SETTING FOR 2ND OR 3RD STAGE

6 PROGRAMMING DOUBLE OR TREBLE QUANTITY PAD

7 MEMORY PAD HEATING FOR DPOUBLE OR TREBLE QUANTITY HEATING

8 TO READ THE CYCLE COUNTER

9 TO ACTIVATE PROGRAM LOCK

10 TO RELEASE PROGRAM LOCK

11 TO SELECT BEEP TONE OPTIONS

3 WIRING REQUIREMENTS AND POWER SOURCE VOLTAGE SELECTION

4 SCHEMATIC DIAGRAM (NE-1257R, NE-1258R)

5 SCHEMATIC DIAGRAM (NE-1257CR)

6 SCHEMATIC DIAGRAM (NE-1757R)

7 SCHEMATIC DIAGRAM (NE-1757CR)

8 SCHEMATIC DIAGRAM (NE-2157R)

9 SCHEMATIC DIAGRAM (NE-2157CR)

10 WIRING DIAGRAM (NE-1257R, NE-1258R)

11 WIRING DIAGRAM (NE-1257CR)

12 WIRING DIAGRAM (NE-1757R)

13 WIRING DIAGRAM (NE-1757CR)

14 WIRING DIAGRAM (NE-2157R)

15 WIRING DIAGRAM (NE-2157CR)

16 DESCRIPTION OF OPERATING SEQUENCE

17 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING

18 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE

18.1. Replacement of magnetrons (Upper and Lower)

Procedure for replacing the upper and lower magnetron components in the oven.

18.2. Replacement of power supply circuit board

18.3. Replacement of digital programmer circuit board

18.4. Replacement of upper antenna

18.5. Replacement of floor shelf and lower antenna

18.6. Replacement of temperature sensor (Thermal protector)

18.7. Disassembly of door assembly

19 COMPONENT TEST PROCEDURE

19.1. High voltage transformer

Procedure for testing the high voltage transformer's continuity and resistance.

19.2. High voltage capacitor

How to test the high voltage capacitor for continuity and shorts.

19.3. Magnetron

Testing methods for the magnetron's filament and case continuity.

19.4. Diode

Procedure for testing diodes using an ohmmeter for front-to-back resistance.

19.5. Membrane key board (Membrane switch assembly)

Checking continuity of membrane switch contacts on the keyboard.

19.6. Protector diode

Testing the protector diode for continuity in both directions.

19.7. Temp sensor (Thermal protector)

20 MEASUREMENTS AND ADJUSTMENTS

20.1. Installation of Safety switch A, Safety switch B and Short switch

Steps for mounting safety and short switches to the door hook assembly.

20.2. Measurement of microwave output

Procedure to measure microwave output power using a water load test.

21 PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE

21.1. Equipment

Lists necessary equipment for measuring microwave leakage.

21.2. Record keeping and notification after measurement

Guidelines for recording leakage readings and reporting excessive levels.

21.3. At least once a year, have the radiation monitor checked for calibration by its manufacturer.

Recommendation for annual calibration of radiation monitoring equipment.

22 TROUBLESHOOTING GUIDE

23 EXPLODED VIEW AND PARTS LIST

24 PARTS LIST

25 DOOR ASSEMBLY

26 ESCUTCHEON BASE ASSEMBLY

27 PACKING AND ACCESSORIES

28 WIRING MATERIAL

29 REF. NO. 89 L. V. TRANSFORMER (U)

30 REF. NO. 58 NOISE FILTER (U)

31 REF. NO. E2 P. C. BOARD (U)

32 DIGITAL PROGRAMMER CIRCUIT

33 DIGITAL PROGRAMMER CIRCUIT PARTS LIST