Panasonic NN-S262SF Service Manual

Also see for NNS252BF - MICROWAVE OVEN/OTR: Service manual Operating instructions Service manual

10.5. Inverter power supply (U)DO NOT try to REPAIR this H.V. Inverter power supply(U).Replace as whole H.V. Inverter(U) Unit.DANGER HIGH VOLTAGETest if failure codes of H97 or H98 appears by doing thefollowing procedure. It is recommended to use an AC line inputcurrent Ampere meter for testing.Test11. Program DPC.a. Tap Clockb. Tap Timerc. Tap Startd. Tap Power Level2. Place 1 liter of water load into oven cavity.3. Unplug 2 pin H.V. lead wire connector CN703 frommagnetron tube.4. Program oven at High power for 1 minute and press start.a. After approximately 23 seconds, oven stops.b. During oven operation, input current is approximately0.5 to 1A. If both a and b are OK, please proceed to test2.INPUT AMPERE FAILURE CODEUnplug CN703 0.5 to 1A Oven stops in 23seconds after started.Test2Continued from Test 11. Unplug 3 pin connector CN701, CN703 remains unplug.2. Set oven at High power for 1 minute and start.a. After approximately 3 seconds, oven stops.b. During oven operation, input current is approximatelyless than 0.4A.INPUT AMPERE FAILURE CODEUnplug CN701 <0.4A Oven stops in 3seconds after started.If both a and b are OK, the Inverter Power Supply (U) can bedetermined OK.19NN-S262SF / NN-S262BF / NN-S262WF / NN-S252BF / NN-S252WF