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TABLE OF CONTENTS
1. CONTROL PANELS.................................................................................................................................................................. 4
2. OPERATION AND DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE ........................................................................ 5
3. SCHEMATIC DIAGRAM............................................................................................................................................................ 7
4. DESCRIPTION OF OPERATING SEQUENCE ......................................................................................................................... 8
4.1 Variable power cooking control......................................................................................................................................... 8
4.2 Autoweight defrost, autoweight cook................................................................................................................................. 8
4.3 Auto Sensor cook ............................................................................................................................................................. 9
5. CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING............................................................................................ 10
5.1 Check the grounding ....................................................................................................................................................... 10
5.2 Inverter Warnings ........................................................................................................................................................... 10
5.3 When parts must be replaced, remove the power plug from the outlet........................................................................... 11
5.4 When the 10A fuse is blown due to the operation of short switch:.................................................................................. 11
5.5 Avoid inserting nails, wire, etc. through any holes in the unit during operation............................................................... 11
5.6 Confirm after repair ......................................................................................................................................................... 11
5.7 Sharp edges.................................................................................................................................................................... 11
6. DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE............................................................................................. 12
6.1 Magnetron....................................................................................................................................................................... 12
6.2 Inverter Power Supply(U) ............................................................................................................................................... 12
6.3 Digital Programmer Circuit (DPC) and membrane key board......................................................................................... 13
6.4 Low voltage transformer and/or power relays (RY1)....................................................................................................... 13
6.5 Fan Motor........................................................................................................................................................................ 13
6.6 Door disassembly............................................................................................................................................................ 14
6.7 Turntable motor............................................................................................................................................................... 14
6.8 Steam Sensor NN-T589WB ............................................................................................................................................ 14
7. COMPONENT TEST PROCEDURE........................................................................................................................................ 15
7.1 Primary Latch Switch, Secondary (Secondary Latch Switch and Power Relay B) Interlocks......................................... 15
7.2 Short Switch & Monitor Circuit ........................................................................................................................................ 15
7.3 Magnetron....................................................................................................................................................................... 15
7.4 Push button key board .................................................................................................................................................... 15
7.5 Inverter Power Supply (U)............................................................................................................................................... 16
7.6 Inverter Power supply (U) ............................................................................................................................................... 16
7.7 Steam Sensor and digital programmer circuit................................................................................................................. 16
8. MEASUREMENTS AND ADJUSTMENTS.............................................................................................................................. 17
8.1 Installation of Primary latch switch, Secondary latch switch and Short switch................................................................ 17
8.2 Measurement of microwave output................................................................................................................................. 17
9. TROUBLESHOOTING GUIDE ............................................................................................................................................... 18
10. EXPLODED VIEW AND PARTS LIST..................................................................................................................................... 22
11. PARTS LISTS.......................................................................................................................................................................... 23
12. DOOR ASSEMBLY.................................................................................................................................................................. 24
13. ESCUTCHEON BASE ASSEMBLY ........................................................................................................................................ 25
14. PACKING AND ACCESSORIES............................................................................................................................................. 26
15. TRIM KIT PARTS LIST............................................................................................................................................................ 27
16. DIGITAL PROGRAMMER CIRCUIT........................................................................................................................................ 28
17. DIGITAL PROGRAMMER CIRCUIT - PARTS LIST ............................................................................................................... 30
FEATURE CHART
FEATURES NN-T559 NN-T589
Microwave 6 6
Weight Defrost 3 3
Stage Cooking 3 stage 3 stage
Delay Stand Yes Yes
Clock 12 Hrs 12 Hrs
Word Prompt English English
Weight Reheat 2 -
Weight Cook 4 -
Sensor Reheat - 2
Sensor Cook - 14
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