7-20
NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS
SERVICED FOR ANY REASON.
(3) CHECKOUT PROCEDURES FOR CIRCUIT
BOARD
The following symptoms indicate a defective circuit
board.
1) 1) The start function fails to operate but the high
voltage Systems, the interlock switches, the door
sensing and the relay check good.
2) The unit with a normal relay continuously operates.
3) Proper temperature measurement is not obtained.
4) The buzzer does not sound or continues to sound.
5) Some segments of one or more digits do not light
up, or they continue to light up, or segments light
when they should not.
6) Wrong figures appear.
7) The figures of all digits.
8) Some of the indicators do no flicker light up.
9) The clock does not keep time properly.
Summary of Contents for NN-S251WL
Page 9: ...5 1 SCHEMATIC DIAGRAM OVERALL CIRCUIT DIAGRAM ...
Page 10: ...MATRIX CIRCUIT FOR TOUCH KEY BOARD 5 2 ...
Page 36: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Page 37: ...8 2 PRINTED CIRCUIT BOARD ...
Page 38: ...3 2 1 EXPLODED VIEW DOOR PARTS MODEL NN S251 4 1 9 7 65 6 5 8 ...
Page 39: ... 2 ESCUTCHEON BASE ASSEMBLY 12 10 13 14 11 67 60 66 ...
Page 40: ... 3 OVEN CAVITY PARTS 26 64 63 65 66 18 16 21 23 24 25 66 66 19 17 15 20 64 22 22 27 ...
Page 41: ... 4 DOOR HOOK PARTS 31 28 32 69 30 29 61 ...
Page 42: ... 5 INTERIOR PARTS I 65 42 33 35 36 37 62 63 34 39 41 38 60 43 63 60 40 63 44 60 60 60 ...
Page 43: ... 6 INTERIOR PARTS II 45 53 46 48 49 51 65 65 60 55 50 47 54 52 ...
