15 TROUBLESHOOTING GUIDE
CAUTION
1.
Check grounding before checking for trouble.
2.
Be careful of the high voltage circuit.
3.
Discharge high voltage capacitor.
4.
When checking the continuity of the switches or the high voltage transformer, disconnect one lead wire from these parts and then check
continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
When disconnecting a plastic connector from a terminal, you must hold the plastic connector instead of the lead wire and then disconnect it,
otherwise lead wire may be open or the connector cannot be removed.
5.
Be sure to ground any static electric charge built up in your body, before handling the D.P.C.
6.
A 208-230V AC is present at the shaded area ( ) of the power supply circuit board (Terminals of power relays and primary circuit of low voltage
transformer). When troubleshooting, be cautious of possible electrical shock hazard.
First of all operate the microwave oven following the correct operating procedures described on pages 4 of this service manual in
order to find the exact cause of any trouble.
NOTE:
If the unit shows faulty symptom as shown below, check the parts listed in possible cause column depending on
failure indication e.g. F81, F82 in the display
.
[TROUBLE] Oven does not operate at all or oven does not start cooking. NE-3280
DISPLAY
CONDITIONS
POSSIBLE CAUSE
TIMING OF FAILURE INDICATION
F33
Open temperature
sensor (exhaust)
1.
Temperature sensor failure
2.
Digital programmer circuit failure
3.
Loose connector CN5
It is appeared when failure occured.
F34
Short temperature
sensor (exhaust)
1.
Temperature sensor failure
2.
Digital programmer circuit failure
It is appeared when failure occured.
F44
1.
Shorted membrane switch
It is appeared 2 minutes after failure
occured.
F01
(With continuous
beep sounds)
Exhaust temperature
exceeds 120°C
1.
Burning food in the oven due to over cook
It is appeared when exhaust temperature
exceeds above 120°C.
F03
Input voltage exceed
+ 12.5%
1.
Increase in power source voltage
It is appeared when the unit is plugged in.
Note that it returns normal operation mode
by tapping the STOP pad.
F04
Input voltage is less
than — 12.5%
1.
Decrease in power source voltage
It is appeared when the unit is plugged in.
Note that it returns normal operation mode
by tapping the STOP pad.
F05
Memory failure
1.
Digital programmer circuit failure
No display
1.25A fuse blown
1.
Low-Voltage transformer failure
No display
1.25A fuse is OK
1.
Thermal cutout failure
2.
Low voltage transformer failure
3.
Digital programmer circuit failure
F81
No voltage supply to
high voltage trans.
(lower/left)
1.
Relay failure RY-3 (A)
2.
Loose connector CN256, CN257
3.
Digital programmer circuit failure
It is appeared when failure occured.
F82
No voltage supply to
high voltage trans.
(lower/right)
1.
Relay failure RY-5 (B)
2.
Loose connector CN258, CN259
3.
Digital programmer circuit failure
It is appeared when failure occured.
F83
No voltage supply to
high voltage trans.
(upper/left)
1.
Relay failure RY-7 (C)
Loose connector CN260, CN261
2.
Digital programmer circuit failure
It is appeared when failure occured.
F84
No voltage supply to
high voltage trans.
(upper/right)
1.
Relay failure RY-9 (C)
Loose connector CN262, CN263
2.
Digital programmer circuit failure
It is appeared when failure occured.
F86
Shorted contacts of RY-
3
1.
Relay failure RY-3 (A)
2.
Digital programmer circuit failure
It is appeared when failure occured.
F87
Shorted contacts of RY-
5
1.
Relay failure RY-5 (B)
2.
Digital programmer circuit failure
It is appeared when failure occured.
F88
Shorted contacts of RY-
7
1.
Relay failure RY-7 (C)
2.
Digital programmer circuit failure
It is appeared when failure occured.
26
NE-3280 / NE-2180 / NE-2180C
Содержание NE-2180C
Страница 4: ...1 CONTROL PANEL 4 NE 3280 NE 2180 NE 2180C ...
Страница 5: ...2 OPERATION PROCEDURE 5 NE 3280 NE 2180 NE 2180C ...
Страница 6: ...6 NE 3280 NE 2180 NE 2180C ...
Страница 7: ...7 NE 3280 NE 2180 NE 2180C ...
Страница 8: ...8 NE 3280 NE 2180 NE 2180C ...
Страница 9: ...3 SCHEMATIC DIAGRAM NE 3280 USA 9 NE 3280 NE 2180 NE 2180C ...
Страница 11: ...5 SCHEMATIC DIAGRAM NE 2180C CANADA 11 NE 3280 NE 2180 NE 2180C ...
Страница 13: ...7 SCHEMATIC DIAGRAM NE 2180 USA 13 NE 3280 NE 2180 NE 2180C ...
Страница 28: ...16 EXPODED VIEW AND PARTS LIST 28 NE 3280 NE 2180 NE 2180C ...
Страница 29: ...29 NE 3280 NE 2180 NE 2180C ...
Страница 37: ...21 WIRING MATERIAL 37 NE 3280 NE 2180 NE 2180C ...
Страница 41: ...41 NE 3280 NE 2180 NE 2180C ...
Страница 42: ...23 DIGITAL PROGRAMMER CIRCUIT PARTS LIST 42 NE 3280 NE 2180 NE 2180C ...
