Panasonic NE-7920 Service Manual Download Page 23 | Manualshive

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Summary of Contents for NE-7920

Page 1: ...ximate Outside Dimensions 24 3 4 W x 18 1 2 D x 14 3 4 H 63 0 cm W x 47 0 cm D x 37 5 cm H Approximate Oven Cavity 15 1 2 W x 15 1 2 D x 9 1 2 H Dimensions 39 5 cm W x 39 5 cm D x 24 0 cm H Approximat...

Page 2: ...ritical parts should be re placed with manufacturer s specified parts to prevent microwave leakage shock fire or other hazards Do not modify the original design SPLLS LMI PSD ASP LSD LP LY FSI XL Inst...

Page 3: ...ee Clock Set Button Power Time Stage Indicator Lights _proveimonan A errae Auto Sensor Status Indicator Lights Timed Defrost Indicator Light Digital Readout Display Window P Indicator Light RPP eee em...

Page 4: ...AB Froz Veg Chops AG Chops Hamburgers Longuit Genius Gumtefor penper cooking procedures A2 Beel Lamb Well A2 Beel Lamb Well Pork l i Cenius MICROPROCESSOR CONTROL Fig 3 NOTE When the oven is first pl...

Page 5: ...of powers DELAY HIGH LOW Delay to combination of any power and Stand DELAY HIGH STAND of powers Defrost Select Pad When Defrost is selected the cycle will also program an automatic stand time equal t...

Page 6: ...ing resumes as soon as the door is closed and Start Pad is tapped The oven light will turn on whenever the door is opened OPERATION PROCEDURE SUMMARIZED DIRECTIONS Time Cooking NE 8020 NE 7920 NE 7920...

Page 7: ...ng the appropriate Time Pads Refer to Step 2 under OneStage Cooking First stage cooking time appears in the Display Window Step 3 Step 4 Step 5 Step 6 Step 7 AT Set second stage cooking power by tappi...

Page 8: ...to blink When Auto Sensor COOK WARM is over WARM Status Indicator Light turns off a beep sounds 5 times and oven shuts off automatically TOD reappears in the Display Window an When Auto Sensor progra...

Page 9: ...Light turns off Oven light turns off and turntable stops TOD reappears in the Display Window AQ NE 7920 NE 7920C AUTO SENSOR COOKING For proper cooking results on Auto Sensor program be sure to cover...

Page 10: ...t TOD simply follow the clock set instructions OQ Q on OQ OQ M High Med M Low Low Warm Fig 4 ae CF OFF fas Oo fas jam jos oO High M High Med M Low Low Warm Fig 5 CAUTION WHEN USING 1 Do not use metalw...

Page 11: ...IMPORTANT FOR PROTECTION FROM MICROWAVE RADIATION FIRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IT IS ESSENTIAL THAT ONLY MANUFACTURERS SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE S...

Page 12: ...rmer through the power relay contacts which are closed by the digital programmer circuit Fan motor starts rotating and cools the magnetron by blowing the air coming from the intake on the back panel o...

Page 13: ...switch A primary and latch switch B secondary open to cut off the primary voltage to the high voltage transformer to stop microwave oscillation B Power indicator light NE 7920 and NE 7920C or stage in...

Page 14: ...to the test or inspection within the microwave generating owner CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING Unlike many other appliances the microwave oven is high voltage high current equipment Tho...

Page 15: ...T PROCEDURE 1 Removal of outer panel Remove the four screws from the front section and seven screws from the rear section The outer panel must now be pushed backward to be lifted off 2 Replacement of...

Page 16: ...tal programmer circuit you must unsolder the two wires from the humidity sensor Never unsolder the wires from the digital pro grammer circuit board itself B When reconnecting the two wires to the humi...

Page 17: ...pro grammer circuit board itself B When reconnecting the two wires to the humidi ty sensor follow the wiring of the sensor on page 11 of this service manual C Remove three screws holding the escutcheo...

Page 18: ...7 Replacement of the door assembly A Remove the 4 bolts holding the upper hinge and lower hinge to the oven assembly B Open the door and while pulling the door toward you work the upper hinge out thr...

Page 19: ...witch to the door hook Mount latch switch A to the door hook assembly by securing the screws as shown in fig 29 30 Door hook assembly Fig 29 B Installation of the door hook assembly to the oven assemb...

Page 20: ...the magnetron s output The power output of the magnetron can be measured by performing a simple water temperature rise test Equipment needed for the Test Two 1 liter beakers One glass thermometer B6 N...

Page 21: ...ning and air inlet openings Electromagnetic radiation monitor Glass thermometer 100 C or 212 F 600cc glass beaker 2 Procedure for measuring radiation leakage A Pour 275 15cc 9 ozs 1 2 oz of 20 BC 68 9...

Page 22: ...icular to the surface making sure the probe end at the base of the cone does not get closer than 2 inches 5cm from any metal If it does erroneous readings may result When high leakage is suspected do...

Page 23: ...you use the microwave oven Insert microwave oven plug tightly Output power is too low Sparks occuring Uneven cooking Low power voltage Food temperature is too low Using metallic ware and allowing it t...

Page 24: ...ammer circuit 12 13 14 ono 8 WOW N 2 Of N D D P C Incomplete segments A Segments missing B Partial segments missing C Digit flickering other than normal fluorescent slight flickering D Colon does not...

Page 25: ...B secondary and short switch and the other and incorrect continuity switch B NOTE 1 Check continuity of Open or shorted Replace digital primary winding of winding programmer low voltage circuit transf...

Page 26: ...replace Adjust or replace Replace Faulty contacts of power relay or open relay coil Open winding Defective digital programmer circuit Replace Replace Replace TROUBLE 4 Oven does not cook at all even t...

Page 27: ...n NOTE 3 The following chart shows the timing periods of the variable power switch POWER 24 V ON TIME 24 V OFF TIME 22 seconds 0 seconds 2 20 7 15 REMEDY Customer education Replace Replace depending o...

Page 28: ...y disconnecting the leads B With the ohmmeter set on the highest resistance scale measure the resistance across the diode terminals Reverse the meter leads and again observe the resistance reading Met...

Page 29: ...ensor heater terminals Normal cold resistance should read about 6 ohm B In order to make sure if the auto sensor function of digital programmer circuit is in working order or not do the following test...

Page 30: ...or NE 7920 NE 7920C stops blinking Timer stops counting down Microwave activity stops Fan motor and turntable stop functioning Oven light turns off 8 Touch Start pad again Oven operates as item 6 9 Ta...

Page 31: ...NE 8020 NE 7920 FOR EXPLODED VIEW AND PARTS LIST For screws washer and nut see page 35 EXPLODED VIEW FOR NE 7920 NE 7920C SEE PAGE 32 FOR NE 8020 SEE PAGE 32...

Page 32: ...en packing OVEN WALL Tray PACKING REF NO 12 DOOR ASSEMBLY For screws washer and nut see page 35 DIGITAL PROGRAMMER CIRCUIT FOR NE 8020 FOR NE 7920 NE 7920C For screws washer and nut see page 35 HIGH V...

Page 33: ...NE9080 730 ia2M 15yM2 7 sees ONE iiooeeneen pea Menosin cover 58 ANE601LB60AP Sensor element 209 ANESOOZSTOAP J Teil ANE6040B60AP ANE6238B60AP Fuse holder Cushion rubber Latch switch bracket Lateh swi...

Page 34: ...ol Vinyl cover ANE0107580AP Door sheet ANE0601B60AP Glass cooking tray ANEO602B60AP Warming rack Rack instruction sheet Lead wire harness Lead wire Lead wire Lead wire Lead wire Lead wire Varistor sey...

Page 35: ...al programmer circuit NE 8020 Low voltage transformer Digital programmer circuit i ANE8249G 10AP ANE8164G20AP ANE803MG20AP ANE8122G20AP Metal shield Ground metal Metal bracket Ground metal B XTNANE4 1...

Page 36: ...rts list S M Order No MOD 7904 003 A A2 A2 A 3 A 3 A10 Ait A1l2 A13 A14 Be B1 B 4 B 5 B 6 B 7 8B 8 BY B10 B13 C 1 C 3 C 5 0 8 C 9 014 NO 1142 deutsch MODELL NE 79 20 NE 7920C NE 8020 Technische Daten...

Page 37: ...Panasonic MATSUSHITA ELECTRIC 4 3 3 Printed in Japan...

Page 38: ...nhalt Mode NE 3920 Peewee eoeooseresereoseocceseeWeedeesesesesseseseGecseGoccceMecsceseveveeseeey SSSHSSOHHSHHSHHH SHEESH HES HHEHEHESSEESHEEEHSH HERES EEHH EE EESEREHHHTESESOE EE HEED SSS HSHAESSHEHS...

Page 39: ...e ce ssssssescscscsesesescsesssssesssssesscssescsesesseesees Farbe der Koptzeile cc scecssssescssscssssessscssesssesssseseseeseeseseseenees WAM COL KOPIZ OIG des ciehces covarecuceeadiauns csiiseer si...

Page 40: ......

Page 41: ...Verfilmungsplan 1 2 3 4 5 6 Noole NE F920 C KNE 020 oe 0C Cie bes fee ee Se el er _ ua _ ap e Gua Leer Frame Zeichenerklarung Information A 4 Index FESZSED Information A 3 A4 quer O...

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