3
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 ........................................................................................................ 9
4.1
Variable power cooking control ........................................................................................................................ 9
4.2
Autoweight defrost, autoweight 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.......................................................... 10
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
Temp sensor (thermal protector).................................................................................................................... 13
6.7
Door disassembly........................................................................................................................................... 14
6.8
Turntable motor .............................................................................................................................................. 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
Temp sensor (Thermal protector)................................................................................................................... 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. DIGITAL PROGRAMMER CIRCUIT....................................................................................................................... 28
16. DIGITAL PROGRAMMER CIRCUIT - PARTS LIST .............................................................................................. 30
FEATURE CHART
FEATURES
Microwave
6
Weight Defrost
3
Weight Reheat
2
Weight Cook
1
Stage Cooking
3 stage
Delay Stand
Yes
Clock
12 Hrs
Word Prompt
English
Summary of Contents for NN-T259CB
Page 7: ...7 3 SCHEMATIC DIAGRAM ...
Page 28: ...28 15 DIGITAL PROGRAMMER CIRCUIT ...
Page 29: ...29 ...
Page 31: ...31 NOTES ...
Page 32: ...32 NOTES SM K PEN S 4L10BP Printed in the UK ...
