Table Of Contents; Schematic Diagram - Panasonic NN-CS894S Service Manual

NN-CS894S
CONTENTS
1 SCHEMATIC DIAGRAM
2 DESCRIPTION OF OPERATING SEQUENCE
2.1. Variable power cooking control
2.2. Inverter power supply circuit
2.3. Turbo defrost, Auto cook
2.4. Sensor cooking
2.5. Sensor and digital programmer circuit
2.6. Grill cooking control
2.7. Convection cooking control
2.8. Steam function
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 8
3.1. Check the grounding
3.2. Inverter warnings
3.3. Part replacement.
3.4. Confirm before repair
3.5. When the 15A fuse is blown due to the malfunction of the
short switch:
3.6. Avoid inserting nails, wire etc. through any holes in the
unit during operation.
3.7. Verification after repair
3.8. Sharp edges
3.9. Hot surface
4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 10
4.1. Cabinet body & Rear cover B
4.2. H.V. Inverter/Magnetron/Digital programmer circuit (D.P.C.)
(AU)/Fan motor/Stirrer motor
4.3. Upper Heater (Heater BU)
4.4. Steam Heater (Heater DU)
4.5. Door assembly/Digital programmer circuit (D.P.C) (FU) &
(D.P.C) (BU)
4.6. Convection motor and convection heater
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5 4.7. Pump
6 4.8. Front cover
6 5 COMPONENT TEST PROCEDURE
6 5.1. Primary, Secondary Latch Switch interlocks & Power
6 Relay RY1
6 5.2. Short Switch
6 5.3. Magnetron
7 5.4. FAN MOTOR
7 5.5. Inverter power supply (U)
7 5.6. Temperature thermistor
6 MEASUREMENTS AND ADJUSTMENTS
8 6.1. Adjustment of Primary latch switch, Secondary latch
8 switch and Short switch.
8 6.2. Measurement of microwave output
9 7 TROUBLESHOOTING GUIDE
7.1. (Troubleshooting) Oven stops operation during cooking 30
9 7.2. (Troubleshooting) Other problems
7.3. Troubleshooting of inverter circuit (U) and magnetron
9 7.4. Simple way of H.V. Inverter/magnetron troubleshooting 33
9 7.5. How to check the semiconductors using an OHM meter 33
9 7.6. H.V. INVERTER MAIN PARTS LIST (Z606YBH20GP)
9 8 EXPLODED VIEW AND PARTS LIST
8.1. EXPLODED VIEW
10 8.2. PARTS LIST
8.3. DOOR & ESCUTCHEON BASE ASSEMBLY
11 8.4. WATER TANK ASSEMBLY
16 8.5. WIRING MATERIALS
16 8.6. PACKING AND ACCESSORIES
9 DIGITAL PROGRAMMER CIRCUIT
17 9.1. SCHEMATIC DIAGRAM (D.P.CIRCUIT AU)
21 9.2. SCHEMATIC DIAGRAM (D.P.CIRCUIT BU & FU)
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