Panasonic NN-K574MF User Manual

ORDER NO.SIMMC0408030A3
Microwave Oven
NN-S554MF NN-S554WF NN-K593MF / NN-K574MF NN-
K574WF / NN-K544WF /
HPE(Hong Kong)
YPQ(Singapore)
MPQ(Malaysia)
TPE(Thailand, Indonesia)
LPK(Philippines)
YTE(Others)
KTE(UAE)
KUE(Egypt)
PTE( Iran)
KPQ(Kuwait, Doha, Qatar, Oman, Bahrain, Pakistan)
STM(Saudi Arabia)
ZPE(CIS Countries)
Please file and use this manual together with the service manual for
Model NN-S553/K593/K573/K543 (ORDER NO. SIMMC0306022C3).
1

Panasonic NN-K574MF Specifications

General

Turntable	Yes
Child Lock	Yes
Type	Microwave Oven
Control Type	Touch Control
Cooking Modes	Microwave

Summary

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

DANGER OF HIGH VOLTAGE AND HIGH TEMPERATURE (HOT/LIVE) OF THE INVERTER POWER SUPPLY (U)

INVERTER WARNING

Critical warnings about the high voltage inverter power supply circuit.

1. SCHEMATIC DIAGRAM

1.1. NN-S554MF/WF

1.2. NN-K593MF/K574/K544WF

2. CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING

2.2. Inverter warnings

3. MEASUREMENTS AND ADJUSTMENTS

3.1. Adjustment of primary latch switch, secondary latch switch and short switch.

Procedure for adjusting door latch and short switches for proper operation.

3.2. Measurement of microwave output

4. EXPLODED VIEW AND PARTS LIST

5. DIGITAL PROGRAMMER CIRCUIT

1. SCHEMATIC DIAGRAM (APH)

2. SCHEMATIC DIAGRAM (CPH)

4. PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE

4.2. Procedure for measuring radiation leakage

Step-by-step guide for measuring microwave radiation leakage.

12. DIGITAL PROGRAMMER CIRCUIT (NN-T583SF APH/CPH) SCHEMATIC DIAGRAM

13. DIGITAL PROGRAMMER CIRCUIT(NN-T563SF APH, / NN-T563SAF APH) SCHEMATIC DIAGRAM

14. DIGITAL PROGRAMMER CIRCUIT(NN-S*** APH/ CPH) SCHEMATIC DIAGRAM

15. DIGITAL PROGRAMMER CIRCUIT PARTS LIST

CONTROL PANEL

OPERATION AND DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE

2. Time Cooking for Two Stage

Instructions for performing two-stage cooking sequences.

3. Inverter Turbo Defrost

Procedure for utilizing the Inverter Turbo Defrost function.

4. Inverter Auto Cooking

Steps for operating the Inverter Auto Cooking feature.

7. Sensor Cooking (NN-S560BFAPH/CPH,NN-S560WFAPH/CPH)

5. Sensor Reheat (NN-S560BFAPH/CPH,NN-S560WFAPH/CPH)

WARNING OF INVERTER POWER SUPPLY (U) GROUNDING

WARNING OF DISCHARGING HIGH VOLTAGE CAPACITORS

DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE

1. Magnetron

Procedure for removing and replacing the magnetron.

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

Steps to remove the DPC and membrane keypad assembly.

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

Procedure for replacing the low voltage transformer and power relays.

5. Door assembly

8. Inverter Power Supply (U)

COMPONENT TEST PROCEDURE

1. Primary Latch Switch, Secondary (Secondary Latch Switch and Power Relay B) Interlocks.

Test procedure for door interlock switches and power relay B.

3. Magnetron

Test procedure for magnetron continuity and resistance.

5. Inverter Power Supply (U)for USA only

Specific test procedure for USA models of the Inverter Power Supply.

6. Steam Sensor and Digital Programmer Circuit

TROUBLESHOOTING GUIDE

2. Be careful of high voltage circuit.

Emphasizes caution when working with high voltage circuits.

3. Discharge high voltage capacitor.

Safety procedure to discharge high voltage capacitors before servicing.

6. 120V AC is present on the digital programmer circuit (Terminals of power relay's and primary circuit of low voltage transformer). When troubleshooting, be cautious of possible electrical shock hazard. Always touch yourself to ground while working on this panel to discharge any static charge in your body.

HOW TO CHECK THE SEMICONDUCTORS USING AN OHM METER

Troubleshooting of Inverter Circuit (U) and Magnetron NEW H.V.

NOTE: DO NOT try to repair this Inverter Power Supply (U) and also DO NOT RE-ADJUST PRESET VOLUME on the board.

Critical warning against repairing or adjusting the Inverter Power Supply.

Alternate way to troubleshoot oven with AC Ampere meter used

Trouble Related to Digital Programmer Circuit

No microwave oscillation at any power setting

H97/H98 appears in window and oven stops operation. Program High power for 1 minute and conduct following test quickly, unless H97/H98 appears and oven stops.

Auto sensor cooking does not operate normally. (Steam Sensor cooking does not detect steam from foods.)