Panasonic NE-2140, Service Manual

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17. TROUBLESHOOTING GUIDE
CAUTION
1. Check grounding before checking for trouble.
2. Be careful of 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 230-240V/400V 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
3 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, NE-3240
32
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