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Panasonic NE-1252 Service Manual

Commercial microwave oven
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TABLE OF CONTENTS

1 Safety Precautions----------------------------------------------- 2
2 Specifications ----------------------------------------------------- 3
3 Technical Descriptions ----------------------------------------- 4
5 Installation Instructions ---------------------------------------- 6
6 Operating Instructions------------------------------------------ 7
7 Test Mode ----------------------------------------------------------12
Commercial Microwave Oven
Model No.
Model No.
Model No.
Model No.
Model No.
Model No.
Model No.
Model No.
Model No.
Model No.
Model No.
PAGE
8 Troubleshooting Guide --------------------------------------- 14
10 Measurements and Adjustments -------------------------- 22
11 Schematic Diagram -------------------------------------------- 25
© Panasonic Corporation 2012 Unauthorized copy-
ing and distribution is a violation of law.
Order Number MOD1206355CE
NE-1252
NE-1752
NE-1772
NE-2152
NE-12521
NE-12523
NE-17521
NE-17523
NE-17723
NE-21521
NE-21523
PAGE

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Summary of Contents for Panasonic NE-1252

  • Page 1: Table Of Contents

    11 Schematic Diagram -------------------------------------------- 25 5 Installation Instructions ---------------------------------------- 6 12 Exploded View and Replacement Parts List ----------- 29 6 Operating Instructions------------------------------------------ 7 7 Test Mode ----------------------------------------------------------12 © Panasonic Corporation 2012 Unauthorized copy- ing and distribution is a violation of law.

  • Page 2: Safety Precautions

    1 Safety Precautions...

  • Page 3: Specifications

    2 Specifications Models: NE-12521 NE-1252 NE-17521 NE-1752 NE-21521 NE-2152 NE-12523 NE-17523 NE-1772 NE-21523 NE-17723 Power Source: 120 V AC Single Phase 60 Hz 208/230 V AC Single Phase 60 Hz Power Requirement: 1990 W, (17.3A) 1970 W, (17.1A) 2650 W, (13.6A) 2610 W, (13.5A)

  • Page 4: Technical Descriptions

    3 Technical Descriptions 3.1. Description of operating sequence Variable power cooking control The coil of power relays are energized intermittently by the digital programmer circuit, when the oven is set to MEDIUM or DEFROST power position. The digital programmer circuit controls the ON-OFF time of each power relay contacts in order to vary the output power of the microwave oven.

  • Page 5: Location Of Controls And Components

    4 Location of Controls and Components 4.1. Outline diagram...

  • Page 6: Installation Instructions

    If it does, the branch circuit fuse may overload CIRCUIT-minimum 20 amps. and either cause the oven to heat slower than expected or blow the fuse. 1. For Mode NE-12521/NE-12523/NE-1252 The oven must be on a SEPARATE, 20 Amp, 60 Hz-120V GROUNDED CIRCUIT. Power Source Voltage Adjustment...

  • Page 7: Operating Instructions

    6 Operating Instructions 6.1. Operation procedure 1. Manual heating for single stage 2. Manual heating for 2nd or 3rd stage NOTE: For a 3rd stage heating cycle, select a further power level and time between steps 3 and 4 above.
  • Page 8 3. Memory setting for single stage 4. Memory setting for 2nd or 3rd stage NOTE: For a 3rd stage heating cycle, select a further power level and dial in a time, between steps 3 and 4 above. TO PROGRAM MEMORY AREA B: Follow steps 1 above. Touch the Memory Shift pad twice and a small [B] will appear beneath the flashing [PROG].
  • Page 9 5. Memory pad heating 6. Programming Double or Treble Quantity Pad NOTE: When program is locked, heating can be started automatically by tapping memory pad.
  • Page 10 7. Memory Pad Heating for Double or Treble Quantity Heat- 8. To Read the Cycle Counter NOTE: Total cumulative number includes programming memory heating and manual heating number of times has been used. Cooking times over 99,999 times will be back 0.
  • Page 11 10. To Release Program Lock 11. To Select Beep Tone Options To select length of tone at end of heating cycle there are 3 options. 1. 3 beeps (factory setting) 2. 60 seconds of short beeps. 3. Beep sounds for 5 seconds, and 3 beeps 30 seconds later and 60 seconds later again.

  • Page 12: Test Mode

    7 Test Mode 7.1. Component test procedure 7.1.1. High voltage transformer 1. Remove connections from the transformer terminals and check continuity. 2. Normal (cold) resistance readings should be as follows: Secondary winding Approx. 80Ω-120Ω Filament winding Approx. 0Ω Primary winding Approx. 0Ω-3Ω 7.1.2.
  • Page 13 7.1.4. Diode 1. Isolate the diode from the circuit by disconnecting the leads. 2. With the ohmmeter set on the highest resistance scale, measure the resistance across the diode terminals. Reverse the meter leads and again observe the resis- tance reading. Meter with 6V, 9V or higher voltage batter- ies should be used to check the front-to-back resistance of the diode, otherwise an infinite resistance may be read in both directions.

  • Page 14: Troubleshooting Guide

    8 Troubleshooting Guide 8.1. Cautions to be observed when troubleshooting Unlike many other appliances, the microwave oven is high-volt- age, high-current equipment. Though it is free from danger in ordinary use, extreme care should be taken during repair. 8.1.1. Check the grounding Do not operate on a 2-wire extension cord.

  • Page 15: Confirm After Repair

    8.1.5. Confirm after repair 1. After repair or replacement of parts, make sure that the screws of the oven, etc. are neither loose nor missing. Microwave might leak if screws are not properly tight- ened. 2. Make sure that all electrical connections are tight before inserting the plug into the wall outlet.
  • Page 16 8.2. Troubleshooting guide...

  • Page 17: Disassembly And Assembly Instructions

    9 Disassembly and Assembly Instructions 9.1. Replacement of magnetrons (Upper and Lower) Upper magnetron 1. Discharge electric charge remaining on the high voltage capacitors. 2. Remove the entire rear panel by removing screws as shown. 3. Disconnect all lead wires from magnetron and thermal cutout.
  • Page 18 9.4. Replacement of PCB BU (for display tube) and membrane switch 1. Remove the grounding screw for membrane switch. 2. Disconnect 2 flat cables of membrane switch and PCB B(U) from PCB A(U). 3. Remove 3 screws holding control panel and detach it from the unit.
  • Page 19 9.5. Replacement of upper antenna 1. Remove ceiling plate by gently moving the left and right tabs inward while pulling the plate down and outward. 2. Using a small flat screwdriver or the like, remove two plastic clips located on the antenna ring. Next turn the antenna ring approx.
  • Page 20 9.7. Replacement of temperature sensor (Thermal protector) 1. Cut 2 lead wires at the top of sensor terminals. 2. Remove 2 screws holding temp sensor and replace with new one. 3. Solder the lead wires securely to the sensor terminals. 9.8.
  • Page 21 9.9. Replacement of PCB FU (SD card) 1. Disconnect CN22 connector from PCB F(U). 2. Remove 3 screws holding SD card unit. 3. Remove 2 screws holding PCB bracket. 4. Remove 2 screws holding PCB F(U). 9.10. Replacement of PCB HU (LED light) 1.

  • Page 22: Measurements And Adjustments

    10 Measurements and Adjustments 10.1. Measurements and adjustments ker (recorded as T2). The normal temperature rise (T2- T1) at High power output for each model is as shown in table. 10.1.1. Installation of Safety switch A, Safety switch B and Short switch 1.

  • Page 23: Procedure For Measuring Microwave Energy Leakage

    10.2. Procedure for measuring microwave energy leakage 10.2.2. Record keeping and notification after measurement 1. After any adjustment or repair to a microwave oven, a leakage reading must be taken. Record this leakage reading on the repair ticket even if it is zero. A copy of this repair ticket and the microwave leakage reading should be kept by repair facility.

  • Page 25: Schematic Diagram

    11 Schematic Diagram 11.1. NE-12521, NE-12523...
  • Page 26 11.2. NE-1252...
  • Page 27 11.3. NE-17521, NE-17523, NE-17723, NE-21521, NE-21523...
  • Page 28 11.4. NE-1752, NE-1772, NE-2152...

  • Page 29: Exploded View And Replacement Parts List

    12 Exploded View and Replacement Parts List 12.1. Exploded view and parts list...
  • Page 30 Safety Ref. Part No. Part Name & Description Pcs/set Remarks ANE00068U0CP WARNING LABEL NE-1252CPH,NE-1752CPR,NE-1772CPR ,NE-2152CPR A00063E80AP WARNING LABEL NE-12521APH,NE-12523APH,NE-17521APR,NE- 17523APR,NE-17723APR,NE-21521APR,NE-21523APR A00333E80AP FUSE LABEL ANE010T8U0AP SHELF ANE01728U0CP CAUTION LABEL A05243F00AP NAME LABEL NE-12521APH A05243F40AP NAME LABEL NE-12523APH A05243E80AP NAME LABEL NE-17521APR A05243F30AP NAME LABEL NE-17523APR...
  • Page 31 Safety Ref. Part No. Part Name & Description Pcs/set Remarks A603L3E80AP D.P.CIRCUIT (U) NE-17521APR,NE-17523APR,NE-1752CPR A603L3E90AP D.P.CIRCUIT (U) NE-17723APR,NE-1772CPR A603L3F00AP D.P.CIRCUIT (U) NE-12521APH,NE-12523APH,NE-1252CPH A603L3E60AP D.P.CIRCUIT (U) NE-21521APR,NE-21523APR,NE-2152CPR ANE60408U0AP OVEN LAMP SHEET 150 °C 10A, ANE61458U0AP THERMAL CUTOUT MAGNETRON ANE60708U0BP INSULATION SHEET A A60713310BP INSULATION SHEET B A63903F00AP...
  • Page 32 Safety Ref. Part No. Part Name & Description Pcs/set Remarks A603Y3F00CP PCB D(U) NE-1252CPH A61713A80BP INSULATION SHEET D A1221-3290 CUSHION RUBBER FOR SD SLOT, NE-17723APR,NE-1772CPR A4898-3B40 SCREW FOR SD SLOT COVER, NE-17723APR,NE-1772CPR A8357-3D00 ESCUTCHEON FOR SD UNIT, NE-17723APR,NE-1772CPR A605S3E60AP PCB H(U) FOR LED LIGHT...

  • Page 33: Door Assembly

    12.2. Door assembly Safety Ref. Part No. Part Name & Description Pcs/set Remarks A3145-3500 DOOR SCREEN A ANE31468U0AP DOOR SCREEN B ANE30038U0AP DOOR FRAME(U) ANE301A8U0AP DOOR A A301H-3850 DOOR KEY LEVER B A301Q-3500 DOOR E(U) A3018-3850 DOOR KEY A A3019-3850 DOOR KEY B ANE30218U0AP DOOR KEY SPRING...

  • Page 34: Escutcheon Base Assembly

    12.3. Escutcheon base assembly Safety Ref. Part No. Part Name & Description Pcs/set Remarks A83373E80AP ESCUTCHEON SHEET A603M-3B10 PCB B(U) FOR DISPLAY TUBE A6479-3B10 MEMBRANE SWITCH A6590-3E10 FLAT CABLE ANE80018U0AP ESCUTCHEON A A80023E20P3 ESCUTCHEON B A80063E20P3 ESCUTCHEON D A800L3E80AP ESCUTCHEON BASE...

  • Page 35: Packing And Accessories

    12.4. Packing and accessories Safety Ref. Part No. Part Name & Description Pcs/set Remarks A00033E80CP INSTRUCTION BOOK NE-1252CPH,NE-1752CPR,NE-1772CPR,NE-2152CPR A00033E80AP INSTRUCTION BOOK NE-12521APH,NE-12523APH,NE-17521APR,NE- 17523APR,NE-17723APR,NE-21521APR,NE-21523APR A04203E80AP OPERATING GUIDE NE-12521APH,NE-12523APH,NE-17521APR,NE- 17523APR,NE-17723APR,NE-21521APR,NE-21523APR A04203E80CP OPERATING GUIDE NE-1252CPH,NE-1752CPR,NE-1772CPR,NE-2152CPR A01023F00AP PACKING CASE PAPER NE-12521APH A01023F40AP PACKING CASE PAPER NE-12523APH A01023F00CP PACKING CASE PAPER...

  • Page 36: Wiring Material

    12.5. Wiring material Safety Ref. Part No. Part Name & Description Pcs/set Remarks A030A3F00AP LEAD WIRE HARNESS NE-12521APH,NE-12523APH A030A3F00CP LEAD WIRE HARNESS NE-1252CPH A030A3E80AP LEAD WIRE HARNESS NE-17521APR,NE-17523APR,NE-1752CPR,NE- 17723APR,NE-1772CPR,NE-21521APR,NE-21523APR,NE- 2152CPR A50966520UP FERRITE CORE NE-1252CPH,NE-1752CPR,NE-1772CPR, NE-2152CPR ERZC10DK471U VARISTOR ERZV10D112 VARISTOR ANE0352-3280 LEAD WIRE FOR ANTENNA MOTOR A03823E90AP...

This manual is also suitable for:

Ne-1752Ne-12521Ne-1772Ne-2152Ne-12523Ne-17521 ... Show all

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