Panasonic NE-1252 Service Manual Download Page 1

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Order Number MOD1206355CE

Commercial Microwave Oven

Model No.

NE-1252

Model No.

NE-1752

Model No.

NE-1772

Model No.

NE-2152

Model No.

NE-12521

Model No.

NE-12523

Model No.

NE-17521

Model No.

NE-17523

Model No.

NE-17723

Model No.

NE-21521

Model No.

NE-21523

TABLE OF CONTENTS

PAGE

1 Safety Precautions

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2 Specifications

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3 Technical Descriptions

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4 Location of Controls and Components

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5 Installation Instructions

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6 Operating Instructions

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7 Test Mode

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8 Troubleshooting Guide

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9 Disassembly and Assembly Instructions

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10 Measurements and Adjustments

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11 Schematic Diagram

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12 Exploded View and Replacement Parts List

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Summary of Contents for NE-1252

Page 1: ...521 Model No NE 17523 Model No NE 17723 Model No NE 21521 Model No NE 21523 TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions 2 2 Specifications 3 3 Technical Descriptions 4 4 Location of Controls and Components 5 5 Installation Instructions 6 6 Operating Instructions 7 7 Test Mode 12 8 Troubleshooting Guide 14 9 Disassembly and Assembly Instructions 17 10 Measurements and Adjustments 22 11 Schemat...

Page 2: ...2 1 Safety Precautions ...

Page 3: ...4 7A 230 V High frequency Output HIGH P10 1200 W 1700 W 2100 W MED P5 P4 Approx 55 45 Approx 55 45 Approx 55 45 DEFROST P1 340 W 340 W 340 W Microwave Frequency 2 450MHZ Timer Maximum programmable time for single stage heating P10 P2 power 15 min P1 DEF 30 min Outside Dimensions 16 5 8 inch W X 20 inch D X 13 1 4 inch H 422 mm W X 508 mm D X 337 mm H Inside Dimensions 13 inch W X 12 7 32 inch D X ...

Page 4: ...it 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 One complete ON and OFF cycle of the power relay is 44 seconds The relation between indications on the control panel and the output power of the microwave oven is as shown in Figure ...

Page 5: ...5 4 Location of Controls and Components 4 1 Outline diagram ...

Page 6: ...52 The oven must be on a SEPARATE 20 Amp 60 Hz 120V GROUNDED CIRCUIT 2 For Model NE 1752 NE 1772 NE 17521 NE 17523 NE 17723 This oven must be on a separate 60 Hz GROUNDED CIRCUIT minimum 15 amps 3 For Model NE 21521 NE 21523 NE 2152 This oven must be on a separate 60 Hz GROUNDED CIRCUIT minimum 20 amps Power Source Voltage Adjustment For 208V 230V models The microwave oven automatically detects 20...

Page 7: ...ng 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: ...nd the previ ously selected time and power level will appear in the dis play window NOTE Once the Memory area B has been selected it cannot be changed back to Memory area A If you do not require Memory area B cancel it by touching the cancel pad and begin again 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 a...

Page 9: ...9 5 Memory pad heating NOTE When program is locked heating can be started automatically by tapping memory pad 6 Programming Double or Treble Quantity Pad ...

Page 10: ...Treble Quantity Heat ing 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 9 To Activate Program Lock ...

Page 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: ...nuity for a short time and then indicate 9MΩ once the capacitor is charged 3 A shorted capacitor will show continuous continuity 4 An open capacitor will show constant 9MΩ 5 Resistance between each terminal and chassis should be infinite 7 1 3 Magnetron Continuity checks can only indicate an open filament or a shorted magnetron To diagnose for an open filament or shorted magnetron 1 Isolate magnet...

Page 13: ...e key board Membrane switch assembly Check continuity between switch terminals by tapping an appropriate pad on the key board The contacts assignment of the respective pads on the key board is as shown in digital pro grammer circuit 7 1 6 Temp sensor Thermal protector A temp sensor is mounted on exhaust guide Its purpose is to automatically shut off the oven in case the cavity overheats for any re...

Page 14: ...lops a malfunction be sure not to oper ate the oven until complete repairs are made If the oven is operated with any of these parts in imperfect con dition hazardous microwave leakage might occur 8 1 3 Warning about the electric charge in the high voltage capacitor For about 30 seconds after the oven is turned off an electric charge remains in the high voltage capacitor When replacing or checking ...

Page 15: ...roperly tight ened 2 Make sure that all electrical connections are tight before inserting the plug into the wall outlet 8 1 6 Avoid inserting nails wire etc through holes in unit during opera tion Never insert a wire nail or any other metal object through the lamp holes on the cavity or any other holes or gaps because such objects may work as an antenna and cause microwave leakage ...

Page 16: ...16 8 2 Troubleshooting guide ...

Page 17: ...l it on the new magnetron Lower magnetron 1 Discharge electric charge remaining on the high voltage capacitors 2 Remove the entire rear panel by removing screws as shown 3 Carefully place the unit on its left side H V Capacitor side 4 Remove the cover by removing 2 screws 5 Remove the 4 screws holding magnetron by inserting screwdriver through the 4 openings on bottom plate 6 Remove 2 screws holdi...

Page 18: ...ews holding PCB A U to detach it from its mounting bracket NOTE1 Please use care in handling the D P C board to avoid damage NOTE2 After replacing the PCB AU with new one set the power voltage 208V or 230V up as below procedure 1 Open the door and leave it open 2 While pressing START pad close the door and open it again 3 Press SHIFT A B C key within 10 second after openning the door 4 Press X2 or...

Page 19: ...e two plastic clips located on the antenna ring Next turn the antenna ring approx 1 8 turn clockwise to unhook the tabs and pull off 9 6 Replacement of floor shelf and lower antenna 1 To remove the floor shelf insert a screwdriver through the small opening on the left side of the oven cavity and care fully lift the floor shelf 2 For removal of lower antenna use the same procedure as upper antenna ...

Page 20: ...right hand corner 4 Remove 2 screws holding door handle and separate door A from door E by carefully freeing catch hooks 5 Remove door key door key lever door key spring and handle pins from door E 6 Assemble the door by taking the above steps in a reverse order Replacement 1 When mounting the door to the oven be sure to adjust the door parallel to the bottom line of the oven face plate by moving ...

Page 21: ...m 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 Disconnect CN17 connector from PCB H U 2 Remove 1 screw holding PCB bracket 3 Remove 2 screws holding PCB H U ...

Page 22: ...y 3 Reconnect the short switch safety switches A B and check the continuity of the monitor circuit and all latch switches again 10 1 2 Measurement of microwave output The power output of the magnetron can be determined by per forming IEC standard test procedures However due to the complexity of IEC test procedures it is recommended to test the magnetron using the simple method outlined below Neces...

Page 23: ...plied with the probe 9 Tap the start pad or set the timer and with the magnetron oscillating measure the leakage by holding the probe perpendicular to the surface being measured 10 Measurement with the outer panel removed Whenever you replace the magnetron measure for radia tion leakage before the outer panel is installed and after all necessary components are replaced or adjusted Spe cial care sh...

Page 24: ...24 ...

Page 25: ...25 11 Schematic Diagram 11 1 NE 12521 NE 12523 ...

Page 26: ...26 11 2 NE 1252 ...

Page 27: ...27 11 3 NE 17521 NE 17523 NE 17723 NE 21521 NE 21523 ...

Page 28: ...28 11 4 NE 1752 NE 1772 NE 2152 ...

Page 29: ...29 12 Exploded View and Replacement Parts List 12 1 Exploded view and parts list ...

Page 30: ...2 30 ANE11668U0AP BASE METAL 1 31 ANE11748U0AP SPACER 1 32 A200A 3850 OVEN 1 33 A2011 3470 CEILING PLATE 1 34 A202K 3850 ANTENNA 1 UPPER 35 A202V3310GP ANTENNA B 1 LOWER NE 12521APH NE 12523APH NE 1252CPH NE 17521APR NE 17523APR NE 1752CPR NE 17723APR NE 1772CPR 35 A202V 3850 ANTENNA B 1 LOWER NE 21521APR NE 21523APR NE 2152CPR 36 ANE21208U0AP SPACER 1 37 A8251 3180 SPACER 1 38 A3020 3850 DOOR HOO...

Page 31: ... AC CORD W PLUG 1 NE 17521APR NE 17523APR NE 1752CPR NE 17723APR NE 1772CPR 90 A900C3F00AP AC CORD W PLUG 1 NE 12521APH NE 12523APH NE 1252CPH 90 A900C3E60AP AC CORD W PLUG 1 NE 21521APR NE 21523APR NE 2152CPR 91 ANE9027510RN CORD BUSHING 1 92 ANE9035P60AP CORD BRACKET 1 93 ANE9035P60AP CLIP BLACK 1 95 ANE91448U0AP BRACKET 1 96 ANE91628U0AP CLIP B 1 97 ANE91658V0AP CLIP 4 98 XTC4 10BC SCREW 4 4X10...

Page 32: ...21 3290 CUSHION RUBBER 1 FOR SD SLOT NE 17723APR NE 1772CPR 121 A4898 3B40 SCREW 1 FOR SD SLOT COVER NE 17723APR NE 1772CPR 122 A8357 3D00 ESCUTCHEON 1 FOR SD UNIT NE 17723APR NE 1772CPR 123 A605S3E60AP PCB H U 1 FOR LED LIGHT Safety Ref No Part No Part Name Description Pcs set Remarks ...

Page 33: ...NE301A8U0AP DOOR A 1 D5 A301H 3850 DOOR KEY LEVER B 1 D6 A301Q 3500 DOOR E U 1 D7 A3018 3850 DOOR KEY A 1 D8 A3019 3850 DOOR KEY B 1 D9 ANE30218U0AP DOOR KEY SPRING 1 D10 ANE30562Q0AP HANDLE PIN 2 D11 A30703170GP HANDLE PEICE A 1 D12 ANE3081P60AP DOOR HINGE SPACER 1 D13 ANE30858U0AP DOOR C 1 D14 ANE30078U0AP HINGE 2 D15 ANE31348U0AP HANDLE PEICE B 1 D16 XYEA4 C16TSJ SCREW 2 4X16 ...

Page 34: ...on Pcs set Remarks E1 A83373E80AP ESCUTCHEON SHEET 1 E2 A603M 3B10 PCB B U 1 FOR DISPLAY TUBE E3 A6479 3B10 MEMBRANE SWITCH 1 E4 A6590 3E10 FLAT CABLE 1 E5 ANE80018U0AP ESCUTCHEON A 1 E6 A80023E20P3 ESCUTCHEON B 1 E7 A80063E20P3 ESCUTCHEON D 1 E8 A800L3E80AP ESCUTCHEON BASE 1 ...

Page 35: ...F40AP PACKING CASE PAPER 1 NE 12523APH P3 A01023F00CP PACKING CASE PAPER 1 NE 1252CPH P3 A01023E80AP PACKING CASE PAPER 1 NE 17521APR P3 A01023F30AP PACKING CASE PAPER 1 NE 17523APR P3 A01023E80CP PACKING CASE PAPER 1 NE 1752CPR P3 A01023E90AP PACKING CASE PAPER 1 NE 17723APR P3 A01023E90CP PACKING CASE PAPER 1 NE 1772CPR P3 A01023E60AP PACKING CASE PAPER 1 NE 21521APR P3 A01023F20AP PACKING CASE ...

Page 36: ...NE 1252CPH W1 A030A3E80AP LEAD WIRE HARNESS 1 NE 17521APR NE 17523APR NE 1752CPR NE 17723APR NE 1772CPR NE 21521APR NE 21523APR NE 2152CPR W2 A50966520UP FERRITE CORE 2 NE 1252CPH NE 1752CPR NE 1772CPR NE 2152CPR W3 ERZC10DK471U VARISTOR 1 W4 ERZV10D112 VARISTOR 2 W5 ANE0352 3280 LEAD WIRE 1 FOR ANTENNA MOTOR W6 A03823E90AP LEAD WIRE 1 FOR PCB A U PCB F U NE 17723APR NE 1772CPR ...

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