Panasonic NN-S235WF Service Manual

ORDER NO.PHAMOS0506021C3
Microwave Oven
NN-S215WF / NN-S215MF / NN-S235WF / NN-S235MF / NN-
S235BF
QPQ(Australia & New Zealand)
HPE(Hong Kong)
YPQ(Singapore)
MPQ(Malaysia)
TPE(Thailand, Indonesia)
LPK(Philippines)
YTE(Others)
KTE(UAE)
PTE( Iran)
KPQ(Kuwait, Doha, Qatar, Oman, Bahrain, Pakistan)
STM(Saudi Arabia)
ZPE(CIS Countries)
SPECIFICATIONS
1

Panasonic NN-S235WF Specifications

General

Brand	Panasonic
Model	NN-S235WF
Category	Microwave Oven
Language	English

Summary

WARNING

CAUTION

1. FEATURE CHART

2. CONTROL PANEL

3. OPERATION AND DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE

3.2. Turbo Defrost

Instructions for using the Turbo Defrost function.

3.3. Auto Cook

Steps for operating the Auto Cook feature.

3.4. Auto Reheat

Procedure for using the Auto Reheat function.

3.5. To Set Child Safety Lock

Instructions on how to activate the child safety lock feature.

3.6. To Reset Child Lock

Steps to deactivate the child safety lock feature.

4. SCHEMATIC DIAGRAM

4.1. NN-S215 (QPQ, ZPE)

Schematic diagram for NN-S215 models specific to QPQ and ZPE regions.

4.2. NN-S215 (EXCEPT QPQ & ZPE)

Schematic diagram for NN-S215 models excluding QPQ and ZPE regions.

4.3. NN-S235

Schematic diagram for NN-S235 models.

5. DESCRIPTION OF OPERATING SEQUENCE

5.1. Variable power cooking control (NN-S235)

Details on how variable power cooking is controlled for NN-S235 models.

5.2. Variable power cooking control (NN-S215)

Details on how variable power cooking is controlled for NN-S215 models.

6. CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING

6.1. Check the grounding

Importance of proper grounding for safe microwave oven operation and repair.

6.2. Warning about the electric charge in the high voltage capacitor

Warning about residual charge in the high voltage capacitor and safe discharge procedure.

6.3. When parts must be replaced, remove the power plug from the outlet.

Mandatory step to disconnect power before replacing parts to prevent electrical hazards.

6.4. When the 8 Amp fuse is blown due to the operation of short switch:

Troubleshooting steps when the 8 Amp fuse blows, indicating potential switch issues.

6.5. Avoid inserting nails, wire, etc. through any holes in the unit during operation.

Prohibition of inserting foreign objects to prevent microwave leakage and damage.

6.6. Confirm after repair

Post-repair checks including screw tightness and microwave leakage test.

7. PROCEDURE

7.1. Magnetron

Step-by-step guide for removing and installing the magnetron.

7.2. Digital Programmer Circuit (DPC) and membrane key board.

Procedure for replacing the digital programmer circuit and membrane keyboard.

7.3. Low voltage transformer and/or power relays (RY1, RY2)

Steps for replacing the low voltage transformer and power relays.

7.4. Timer

Procedure for removing and replacing the timer assembly.

7.5. Fan motor

Instructions for removing and installing the fan motor.

7.6. Door assembly

Steps for disassembling and reassembling the microwave oven door.

7.7. Turntable motor

Procedure for removing and replacing the turntable motor.

8. COMPONENT TEST PROCEDURE

8.1. Primary Latch Switch, (Door Switch and Power Relay B) Interlocks.

Testing procedures for interlock switches and power relay B.

8.2. Short Switch & Monitor

Testing the short switch and monitor circuit for proper operation.

8.3. High voltage transformer

Checking the resistance of the high voltage transformer windings.

8.4. High voltage capacitor

Procedure for testing the continuity and resistance of the high voltage capacitor.

8.5. Magnetron

Diagnosing open filament or shorted magnetron conditions.

8.6. Variable power controller

Test procedures for the variable power controller.

8.7. Diode (U)

Testing the forward and reverse resistance of the diode (U).

8.8. Membrane key board (Membrane switch assembly)

Checking continuity of the membrane keyboard switch terminals.

9. MEASUREMENTS AND ADJUSTMENTS

9.1. Adjustment of Primary latch switch, Secondary latch switch and Short switch.

Adjusting door hook assembly and testing latch switches after mounting.

9.2. Measurement of microwave output

Method for measuring the microwave output power using a simple test.

10. TROUBLESHOOTING GUIDE

10.1. Trouble related to Digital Programmer Circuit

Troubleshooting specific problems associated with the Digital Programmer Circuit.

10.2. How To CHECK THE SEMICONDUCTORS USING AN OHM METER

Guidance on using an ohm meter to check various semiconductor components.

11. EXPLODED VIEW AND PARTS LIST

11.1. EXPLODED VIEW

Illustrated exploded view of the microwave oven showing component placement.

11.2. PARTS LIST

Detailed list of part numbers and descriptions for ordering replacements.

11.3. DOOR ASSEMBLY

Exploded view and parts list specific to the door assembly.

11.4. WIRING MATERIALS

List of wiring harnesses and materials used in the microwave oven.

11.5. PACKING AND ACCESSORIES

Components and materials included with the microwave oven for packing.

11.6. ESCUTCHEON BASE ASSEMBLY

Exploded view and parts list for the escutcheon base assembly.

12. DIGITAL PROGRAMMER CIRCUIT (NN-S235WF/ MF/BF)

12.1. SCHEMATIC DIAGRAM

Schematic diagram of the digital programmer circuit.

12.2. PARTS LIST

List of parts specifically for the digital programmer circuit.