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Panasonic NE-1257CR manual

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Table of contents for the manual

  • Page 1

    © 2000 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthoriz ed copying and distribution is a violation of law. NE-1257R/ NE- 1257CR NE-1757R/ NE- 1757CR NE-2157R/ NE- 2157CR NE-1258R Commercial Microw a v e Oven ORDER NO. MOD0009238C1 E10[...]

  • Page 2

    1 OUTLINE DIAGRAM 4 2 OPERATIO N PROCEDURE 5 3 WIRING REQUIREM ENTS AND POWER SOURCE VOLTAGE SELECTIO N 10 4 SCHEMAT IC DIAGRAM (NE -125 7R, N E-12 58R) 11 5 SCHEMAT IC DIAGRAM (NE -125 7CR) 12 6 SCHEMAT IC DIAGRAM (NE -175 7R) 13 7 SCHEMAT IC DIAGRAM (NE -175 7CR) 14 8 SCHEMAT IC DIAGRAM (NE -215 7R) 15 9 SCHEMAT IC DIAGRAM (NE -215 7CR) 16 10 WIR[...]

  • Page 3

    14 WIRING DIAGRAM (NE -2 157 R) 21 15 WIRING DIAGRAM (NE -2 157 CR ) 22 16 DESCRIPT ION OF OPERATIN G SEQUENC E 23 17 CAUTIONS TO BE OBSERVE D WHEN TROUBLESHOOTING 24 18 DISASSEM BLY AND PARTS REPLACEM ENT PROCEDURE 26 19 COMPONE NT TEST PROCEDURE 30 20 MEASURE MENTS AND ADJUSTMENTS 32 21 PROCEDU RE FOR MEASURING MICROWA VE ENERGY LEAKAGE 33 22 TRO[...]

  • Page 4

    1 OUTLINE DIAGRAM 4 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 5

    2 OPERATIO N PROCEDU RE 5 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 6

    6 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 7

    7 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 8

    8 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 9

    9 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 10

    Wiring Requiremen ts No other applian ce should share the circuit with the microwave oven. If it does, the branch circuit fuse may overloa d and either cause the oven to heat slower than expect ed or blow the fuse. 1. For Mode NE-1257 The oven must be on a SEPAR ATE, 20 Amp, 60 Hz-120V GROU NDED CIRCUIT. 2. For Model NE-1757 a. This oven must be on[...]

  • Page 11

    4 SCHEMATIC DIAGRAM (NE-1257R, NE-1258R) 11 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 12

    5 SCHEMATIC DIAGRAM (NE- 1257CR) 12 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 13

    6 SCHEMATIC DIAGRAM (NE- 1757R) 13 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 14

    7 SCHEMATIC DIAGRAM (NE- 1757CR) 14 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 15

    8 SCHEMATIC DIAGRAM (NE- 2157R) 15 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 16

    9 SCHEMATIC DIAGRAM (NE- 2157CR) 16 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 17

    10 WIRING DIAGRAM (NE-1257R, NE-1258R) NOTE : When replacing, check the lead wire color as shown. 17 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 18

    11 WIRING DIAGRAM (NE-1257CR) NOTE : When replacing, check the lead wire color as shown. 18 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 19

    12 WIRING DIAGRAM (NE-1757R) NOTE : When replacing, check the lead wire color as shown. 19 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 20

    13 WIRING DIAGRAM (NE-1757CR) NOTE : When replacing, check the lead wire color as shown. 20 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 21

    14 WIRING DIAGRAM (NE-2157R) NOTE : When replacing, check the lead wire color as shown. 21 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 22

    15 WIRING DIAGRAM (NE-2157CR) NOTE : When replacing, check the lead wire color as shown. 22 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 23

    Variab le power cookin g contro l The coil of power relay A and B are energized intermittently by the digital progra mmer circuit, when the oven is set to MEDIU M or DEFRO ST power positio n. The digital progra mmer circuit contro ls the ON-OFF time of the power relay A and B contac ts in order to vary the output power of the microw ave oven. One c[...]

  • Page 24

    Unlike many other applian ces, the microw ave oven is high- voltage, high-cu rrent equipm ent. Thoug h it is free from dange r in ordina ry use, extrem e care should be taken during repair. 17.1. Check the grounding Do not operat e on a 2-wire extens ion cord. The microw ave oven is designed to be used in a comple tely ground ed condition. It is im[...]

  • Page 25

    17.5. Confirm after repair 1. After repair or replace ment of parts, make sure that the screws of the oven, etc. are neither loose nor missin g. Microwave might leak if screws are not proper ly tightened. 2. Make sure that all electrical connec tions are tight before insertin g the plug into the wall outlet. 17.6. Avoid inserting nails, wire, etc. [...]

  • Page 26

    18.1. Replacement of magnetrons (Upper and Lower) Upper magne tron 1. Discha rge electric charge remain ing on the high voltage capacitors. 2. Remov e the entire rear panel by removing screws as shown. 3. Discon nect all lead wires from magne tron and thermal cutout. 4. Remov e the 4 screws holding magne tron. 5. Remov e 2 screws holding thermal cu[...]

  • Page 27

    Removal of Positiv e Lock conne ctor The positiv e lock connec tor is a specially design ed loose free connec tor and you will find this connec tor in many lead wire connec tions. To remove this connector, pull the lead wire by pressin g an extruded lever in the center of recept acle terminal as shown. 18.2. Replacement of power supply circuit boar[...]

  • Page 28

    18.4. Replacement of upper antenna 1. Remov e ceiling plate by gently moving the left and right tabs inward while pulling the plate down and outwar d. 2. Using a small flat screwdriver or the like, remove two plastic clips located on the antenn a ring. Nest turn the antenn a ring approx . 1/8 turn clockwise to unhoo k the tabs and pull off. 18.5. R[...]

  • Page 29

    2. Remov e 2 screws holding temp sensor and replace with new one. 3. Solder the lead wires secure ly to the sensor termin als. 18.7. Disassembly of door assembly 1. Remov e each 2 bolts holding upper and lower hinges . 2. Open the door and while pulling the door outwar d, work upper and lower hinges out throug h the holes of the front surface of ov[...]

  • Page 30

    19.1. High voltage transformer 1. Remov e connec tions from the transfo rmer terminals and check continu ity. 2. Norma l (cold) resista nce readin gs should be as follows : Secon dary windin g Approx . 80 Ω —120 Ω Filame nt windin g Approx . 0 Ω Primary windin g Approx . 0 Ω —3 Ω 19.2. High voltage capacitor 1. Check continu ity of ca[...]

  • Page 31

    one or both directio ns. 19.7. Temp sensor (Thermal protector) A temp sensor is mount ed on exhaus t guide. Its purpos e is to autom atically shut off the oven in case the cavity overhe ats for any reason. The therma l protec tor will operate at 257°F (125°C ). The device is connec ted to the DPC on touch contro l models . When the thermal protec[...]

  • Page 32

    20.1. Installation of Safety switch A , Safety switch B and Short switch 1. When mount ing Safety switch A, Safety switch B and short switch to door hook assem bly, mount the Safety switch A, Safety switch B and the short switch to the door hook assem bl y as shown . (in Figure). NOTE: N o specific adjust ment during installation of Safety switch A[...]

  • Page 33

    NOTE: The U. S. Gover nment standa rd is 5 mW/cm 2 while in the custom er's home. 2 mW/cm 2 stated here is our ow n voluntary standa rd. (1 mW/cm 2 for Canad a) 21.1. Equipment Note before measu ring. 1. Do not exceed meter full scale deflect ion. Leakag e monito r should initially be set to the highes t scale. 2. To preven t false readin gs t[...]

  • Page 34

    34 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 35

    22 TROUBLE SHOOTIN G GUIDE 35 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 36

    23 EXPLODE D VIEW AND PARTS LIST 36 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 37

    24 PARTS LIST NOTE : When ordering replace ment part(s), please use part numbe r(s) shown in this parts list. Important safety notice: Compo nents identifi ed by mark have specia l characteristic s important for safety. When replaci ng an y of these compo nents, use only manuf acture 's specifi ed parts. Ref. No. Part No. Part Name & Descr[...]

  • Page 38

    Ref. No. Part No. Part Name & Description Pcs/ Set Remarks 37 A8251-3180 SPACER 1 38 A3020-3850 DOOR HOOK A 1 39 A3136-3470 HOOK SPACER A 1 40 A3137-3850 HOOK SPACER B 1 41 A3138-3470 HOOK SPACER C 1 42 A31863960CP DOOR PANEL 1 NE-1257CR 42 A31863960AP DOOR PANEL 1 NE-1257R 42 A31863990AP DOOR PANEL 1 NE-1258R 42 A31863970CP DOOR PANEL 1 NE-175[...]

  • Page 39

    Ref. No. Part No. Part Name & Description Pcs/ Set Remarks 83 A6408-3280 WASHER 1 84 ANE65448U0AP SPACER A 1 85 A6585-3280 P.C.B.HOLDER 1 86 ANE66038U0AP OVEN LAMP BRACKET 1 87 ANE66268U0AP THERMAL CUTOUT MOUNT 1 NE-1257R NE-1258R NE-1757R 88 A6688-3180 P.C.B.COVER 1 89 A692M3650AP L.V.TRANSFORMER (U) 1 NE-1257CR NE-1257R NE-1258R 89 A692M3660A[...]

  • Page 40

    25 DOOR ASSEMBL Y Ref. No. Part No. Part Name & Description Pcs/ Set Remarks D1 A3145-3500 DOOR SCREEN A 1 D2 ANE31468U0AP DOOR SCREEN B 1 D3 ANE30038U0AP DOOR FRAME(U) 1 D4 ANE301A8U0AP DOOR A 1 D5 A301H-3850 DOOR KEY LEVER B 1 D6 ANE301Q8U0AP DOOR E(U) 1 D7 A3018-3850 DOOR KEY A 1 D8 A3019-3850 DOOR KEY B 1 D9 ANE30218U0AP DOOR KEY SPRING 1 D[...]

  • Page 41

    26 ESCUTCH EON BASE ASSEMBL Y Ref. No. Part No. Part Name & Description Pcs/ Set Remarks E1 A8337-3280 ESCUTCHEON SHEET 1 E2 A603M3310GP PC BOARD B (U) 1 E3 A64793310QP MEMBRANE SWITCH 1 E4 A6590-3280 FLAT CABLE 1 E5 ANE80018U0AP ESCUTCHEON A 1 E6 ANE80028U0AP ESCUTCHEON B 1 E7 ANE80068U0AP ESCUTCHEON D 1 E8 A800L3310QP ESCUTCHEON BASE 1 41 NE-[...]

  • Page 42

    27 PACKING AND ACCESSO RIES Ref. No. Part No. Part Name & Description Pcs/ Set Remarks P1 A00033960CP INSTRUCTION BOOK 1 NE- 1257CR NE-1757CR NE-2157CR P1 A00033960AP INSTRUCTION BOOK 1 NE- 1257R NE-1258R NE-1757R NE-2157R P2 A04203960AP OPERATING GUIDE 1 P3 A01023960CP PACKING CASE PAPER 1 NE- 1257CR P3 A01023960AP PACKING CASE PAPER 1 NE- 125[...]

  • Page 43

    28 WIRING MATERIAL Ref. No. Part No. Part Name & Description Pcs/ Set Remarks W1 A030A3960CP LEAD WIRE HARNESS 1 NE-1257CR W1 A030A3960AP LEAD WIRE HARNESS 1 NE-1257R NE-1258R W1 A030A3970CP LEAD WIRE HARNESS 1 NE-1757CR W1 A030A3970AP LEAD WIRE HARNESS 1 NE-1757R W1 A030A3980AP LEAD WIRE HARNESS 1 NE-2157R NE-2157CR W1 A030A3980CP LEAD WIRE HA[...]

  • Page 44

    29 REF. NO. 89 L. V. TRANSFORMER (U) Ref. No. Part No. Part Name & Description Pcs/ Set Remarks ANE61158U0AP POWER RELAYBRACKET 1 ANE65448U0AP SPACER A 6 ANE65458U0AP SPACER B 2 A6338-3280 INSULATION SHEET B 1 XYN3+F25S SCREW 2 3X25 CN100 AEEMMF01F05W CONNECTOR 1 5PIN CN101 AEEMMF03F06W CONNECTOR 1 6PIN CN102 AEEMMD04907W CONNECTOR 1 7PIN CN103[...]

  • Page 45

    31 REF. NO. E2 P. C. BOARD (U) Ref. No. Part No. Part Name & Description Pcs/ Set Remarks CN250 AEEMHLIM21S CONNECTOR 1 21PIN DISP25 0 A64563080AP FLOURESCENT TUBE 1 FV443 ANE82848U2AP SPACER 1 45 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 46

    32 DIGITAL PROGRAMMER CIRCUIT SCHE MATIC DIAGRAM 46 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258R[...]

  • Page 47

    47 NE-1257R /NE-1257CR / NE-17 57R/N E-175 7CR / NE-21 57R/NE-215 7CR / NE-1258[...]

  • Page 48

    33 DIGITAL PROGRAMMER CIRCUIT PARTS LIST Ref. No. Part No. Part Name & Description Pcs/ Set Remarks BZ1 EFBRL37C20 BUZZER 1 3.7KHZ C10 35 36 37 ECA1HM471B ELECTROLYTIC CAPACITOR AL 4 470MF/50V C11 ECA1HM221B ELECTROLYTIC CAPACITOR AL 1 220MF/50V C12 13 15 28 34 AECF50F104Z CERAMIC CAPACITOR 5 0.1MF/50V C14 ECEA1CKA100B ELECTROLYTIC CAPACITOR AL[...]