Panasonic NE-C1275 Service Manual
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Panasonic NE-C1275 Service Manual

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NE-C1275
NE-C1475
© 2005 Matsushita Electric Industrial Co., Ltd. All
rights
reserved.
distribution is a violation of law.
・CORDER NO. MOD0510275C2

Microwave Oven

Unauthorized
copying
and

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Summary of Contents for Panasonic NE-C1275

  • Page 1: Microwave Oven

    ・CORDER NO. MOD0510275C2 Microwave Oven NE-C1275 NE-C1475 © 2005 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.

  • Page 2: Table Of Contents

    NE-C1275 / NE-C1475 CONTENTS Page Page 1 CONTROL PANEL 10 TROUBLESHOOTING GUIDE 2 OPERATION PROCEDURE 11 EXPLODED VIEW AND PARTS LIST 3 SCHEMATIC DIAGRAM 12 PARTS LIST 4 WIRING DIAGRAM 13 DOOR ASSEMBLY 5 DESCRIPTION OF OPERATING SEQUENCE 14 ESCUTCHEON BASE ASSEMBLY...

  • Page 3: Control Panel

    NE-C1275 / NE-C1475 1 CONTROL PANEL...

  • Page 4: Operation Procedure

    NE-C1275 / NE-C1475 2 OPERATION PROCEDURE...
  • Page 5 NE-C1275 / NE-C1475...
  • Page 6 NE-C1275 / NE-C1475...
  • Page 7 NE-C1275 / NE-C1475...
  • Page 8 NE-C1275 / NE-C1475...

  • Page 9: Schematic Diagram

    NE-C1275 / NE-C1475 3 SCHEMATIC DIAGRAM...

  • Page 10: Wiring Diagram

    NE-C1275 / NE-C1475 4 WIRING DIAGRAM...

  • Page 11: Description Of Operating Sequence

    NE-C1275 / NE-C1475 5 DESCRIPTION OF OPERATING SEQUENCE 5.1. Variable power cooking output of the microwave oven is as shown in table. NOTE 1: control The ON/OFF time ratio does not correspond with the percentageof microwave power since approximately 2 The coil of power relays are energized intermittently by the seconds are required for heating of magnetron filament.
  • Page 12 NE-C1275 / NE-C1475 power relays alternately again. 5.2. Convection cooking control NOTE 1: The digital programmer circuit controls the ON-OFF time of When convection is selected with temperature setting of upper and convection heater inorder to control the oven cavity 100-250°C, off period of both heaters is also programmed...
  • Page 13 NE-C1275 / NE-C1475 power relay 1, 3 contol signal so that microwave activity 5.4. Combination cooking control continue at predetermined duty ratio as shown in figure. The microwave activity continue to cycle until entire cooking Combination cooking is accomplished by operating the programme is completed.

  • Page 14: Cautions To Be Observed When Troubleshooting

    NE-C1275 / NE-C1475 6 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING Unlike many other appliances, the microwave oven is a high WARNING voltage, high current apparatus. There is high-voltage present, with high-current capabilities in the circuits of the high voltage winding and filament winding of the high Although it is safe to operate, extreme care should be taken voltage transformer.

  • Page 15: Disassembly And Parts Replacement Procedure

    NE-C1275 / NE-C1475 WARNING Important Note Never operate the oven until the following are confirmed: 1. High voltage (above 250 volts) exists at following parts during (A) The door is tightly closed. oven operation. (B) There is no broken hinge or door arm.

  • Page 16: Door Assembly

    NE-C1275 / NE-C1475 NOTE 1: The membrane key board is attached to the escutcheon base with double faced adhesive tape. Therefore, applying hot air from A hair dryer is recommended for smoother removal. NOTE 2: When installing new membrane key board, make sure...
  • Page 17 NE-C1275 / NE-C1475 6. Separate the door A from door E by carefully freeing catch 4. Disconnect motor lead wire. hooks on door A while pulling outward. 7. Remove the door key spring and the door key. 8. Remove 2 screws holding door handle.

  • Page 18: Component Test Procedure

    NE-C1275 / NE-C1475 7.7. Convection Heater 1. Remove 10 screws holding back panel. 2. Disconnect heater and circulation fan motor lead wire connector. 3. Remove a screw holding exhaust guide. 4. Remove 5 screws holding heater panel. 5. Slide up heater panel unit to release from oven cavity.

  • Page 19: High Voltage Capacitor

    NE-C1275 / NE-C1475 8.2. High voltage capacitor 8.4. Magnetron 1. Check continuity of capacitor with ohmmeter on highest Continuity checks can only indicate an open filament or a OHM scale. shorted magnetron. To diagnose for an open filament or shorted magnetron.

  • Page 20: Measurements And Adjustments

    NE-C1275 / NE-C1475 8.6. Protector diode 8.7. To test the oven temp sensor thermistor 1. Isolate the protector diode assembly from the circuit by disconnecting its leads. This sensor monitors the heat produced by the heater circuit 2. With the ohmmeter set on the highest resistance scale, and maintains the oven temperature the user has selected.

  • Page 21: Troubleshooting Guide

    NE-C1275 / NE-C1475 TABLE (1 litre-1min. test) RATED OUTPUT TEMPERATURE RISE 1100W (IEC-705) Min 9.4°C 1300W (IEC-705) Min 11.1°C 10 TROUBLESHOOTING GUIDE CAUTION 1. Check grounding before checking for trouble. 2. Be careful of the high voltage circuit. 3. Discharge high voltage capacitor.
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  • Page 26: Exploded View And Parts List

    NE-C1275 / NE-C1475 11 EXPLODED VIEW AND PARTS LIST...
  • Page 27 NE-C1275 / NE-C1475...

  • Page 28: Parts List

    NE-C1275 / NE-C1475 12 PARTS LIST NOTE: When ordering replacement(s), please use part number(s) shown in this parts list. Do not use description the part. Important safety notice: Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacturer’s specified parts.
  • Page 29 NE-C1275 / NE-C1475 Ref. No. Part No. Part Name & Description Pcs/set Remarks A22583230BP ADIABATIC MATERIAL C A22593230BP ADIABATIC MATERIAL D A22603230BP ADIABATIC MATERIAL E A22613230BP ADIABATIC MATERIAL F A22773230BP LOWER HEATER PANEL A22783230BP UPPER HEATER PANEL A23793230BP ADIABATIC MATERIAL G...
  • Page 30 NE-C1275 / NE-C1475 Ref. No. Part No. Part Name & Description Pcs/set Remarks MS212854KW91 H.V.CAPACITOR NE-C1275 BPQ 0.85MF MS212105KW91 H.V.CAPACITOR NE-C1475 EUG 1.0MF XNG4EVSL NUT, COUNTER CLOCKWISE HEATER FAN MOTOR M4 SUS XNW5EFN SHELF SUPPORT SPACER XST4+6VS SCREW (4×6) LAMP GLASS PLATE...

  • Page 31: Door Assembly

    NE-C1275 / NE-C1475 13 DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks A300A3230BP DOOR B A300B3230BP UPPER HINGE A30013C50BP DOOR A (U) A301H-3850 DOOR KEY LEVER B A302K3230BP DOOR E (U) W/DOOR SCREEN A A30183230BP DOOR KEY A...

  • Page 32: Escutcheon Base Assembly

    NE-C1275 / NE-C1475 14 ESCUTCHEON BASE ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks A01573C50BP NAME LABEL NE-C1275BPQ A01573C60EU NAME LABEL NE-C1475EUG ANE0962000AH CUSHION RUBBER D A603L3C50BP D.P.CIRCUIT (U) NE-1275 BPQ RTL(W/COMPONENT) A603L3C50EU D.P.CIRCUIT (U) NE-1475 EUG RTL(W/COMPONENT)

  • Page 33: Packing And Accessories

    NE-C1275 / NE-C1475 15 PACKING AND ACCESSORIES Ref. No. Part No. Part Name & Description Pcs/Set Remarks A00033C50BP INSTRUCTION BOOK NE-C1275BPQ A00033C60EU INSTRUCTION BOOK NE-C1475EUG A01023C50BP PACKING CASE, PAPER NE-C1275BPQ A01023C60EU PACKING CASE, PAPER NE-C1475EUG A01043840AP UPPER FILLER A01053840AP LOWER FILLER...

  • Page 34: Wiring Material

    NE-C1275 / NE-C1475 16 WIRING MATERIAL Ref. No. Part No. Part Name & Description Pcs/Set Remarks A030A3C50BP LEAD WIRE HARNESS A03603C50BP LEAD WIRE A61393230BP INSULATION TUBE A50966520UP FERRITE CORE A606V3230BP PROTECTOR DIODE A A606W3230BP PROTECTOR DIODE B Ref. No. Part No.

  • Page 35: Digital Programmer Circuit

    NE-C1275 / NE-C1475 17 DIGITAL PROGRAMMER CIRCUIT SCHEMATIC DIAGRAM...
  • Page 36 NE-C1275 / NE-C1475...

  • Page 37: Digital Programmer Circuit

    NE-C1275 / NE-C1475 18 DIGITAL PROGRAMMER CIRCUIT PARTS LIST Ref. No. Part No. Description Pcs/Set Remarks DISP110 A66173C50BP Display holder D27, D220, B0AACK000004 Diode, Si 0.1A AESS133T-77 D222, D223, D224, D225, D226, D227, D229, D230, D231, D232, D233, D311, D312, D313...
  • Page 38 NE-C1275 / NE-C1475 R10, R182, D0GB222JA002 Chip Resistor 2.2K, 1/16W, 5%, AERJ3GSYJ222 R313, R381 D0GB223JA002 Chip Resistor 22K, 1/16, 5%, AERJ3GSYJ223 R211, R233, D0GB272JA002 Chip Resistor 2.7KΩ, 1/16W5%, AERJ3GSYJ272 R235, R237, R239, R241, R243, R245, R247, R249 R315 D0GB333JA002 Chip Resistor...

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Ne-c1475

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