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SERVICE

MICROWAVE OVEN

CONTENTS

MICROWAVE OVEN

1. Precaution

2. Specifications

3. Operating Instructions

4. Disassembly and Reassembly

5. Alignment and Adjustments

6. Troubleshooting

7. Exploded Views and Parts List

8. PCB Diagrams

9. Schematic Diagrams

Manual

CE2827NR

SRSC

Содержание CE2827NR

Страница 1: ...MICROWAVE OVEN 1 Precaution 2 Specifications 3 Operating Instructions 4 Disassembly and Reassembly 5 Alignment and Adjustments 6 Troubleshooting 7 Exploded Views and Parts List 8 PCB Diagrams 9 Schematic Diagrams Manual CE2827NR SRSC ...

Страница 2: ...s and latches 5 evidence of dropping or abuse c Before turning on microwave power for any service test or inspection within the microwave generating compartments check the magnetron wave guide or transmission line and cavity for proper alignment integrity and connections d Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems s...

Страница 3: ...hould remove their watches while repairing an MWO 11 To avoid any possible radiation hazard replace parts in accordance with the wiring diagram Also use only the exact replacements for the following parts Primary and secondary interlock switches interlock monitor switch 12 If the fuse is blown by the Interlock Monitor Switch Replace all of the following at the same time Primary door sensing switch...

Страница 4: ...Figure 1 1 2 The high voltage capacitor remains charged about 30 seconds after disconnection Short he negative terminal of the high voltage capacitor to to the oven chassis Use a screwdriver 3 High voltage is maintained within specified limits by close tolerance safety related components and adjustments If the high voltage exceeds the specified limits check each of the special components PRECAUTIO...

Страница 5: ... COOLING METHOD OUTSIDE DIMENSIONS OVEN DIMENSIONS CAVITY DIMENSIONS SHIPPING WEIGHT APPROX 60 MINUTES 230V 50Hz AC MICROWAVE 1 300W GRILL 1100W COMBI 2400W FROM 100 TO 850W IEC 705 TEST PROCEDURE 2 450MHz OM75P 31 ESS COOLING FAN MOTOR 489 W x 275 H x 415 D 330 W x 211 H x 329 D 557 W x 329 H x 451 D NET 15 0 kg CROSS 16 5 kg ...

Страница 6: ...ting Instructions 3 1 Control Panel 3 2 Features External Views 342mm 489mm 206mm 397mm 275mm VENTILATION HOLES LIGHT GRILL DOOR LATCHES HANDLE DOOR COUPLER ROLLER RING SAFETY INTERLOCK HOLES TURNTABLE METAL RACK ...

Страница 7: ... does not hit any adjacent parts or it may be damaged NOTE2 When replacing the magnetron be sure to remount the magnetron gasket in the correct position and make sure the gasket is in good condition 4 2 Replacement of High Voltage Transformer 1 Discharge the high voltage capacitor 2 Disconnect all the leads 3 Remove the mounting bolts 4 Reconnect the leads correctly and firmly PRECAUTION Serviceme...

Страница 8: ...ul when handling Door C because it is fragile Then remove the door assembly 4 3 3 Removal of Door E Following the procedure as shown in the figure insert and bend a thin metal plate between Door E and Door A until you hear the tick sound Insertion depth of the thin metal plate should be 0 5mm or less 4 3 4 Removal of Key Door Spring Remove pin hinge from Door E Detach spring from Door E and key do...

Страница 9: ...rate properly check if any other part such as the control circuit board blower motor or high voltage transformer is defective 4 5 Replacement of Drive Motor 1 Take out the glass tray guide roller and coupler from cavity 2 Turn the oven upside down to replace the drive motor 3 Remove a screw securing the drive motor cover 4 Disconnect all the lead wires from the drive motor 5 Remove screws securing...

Страница 10: ...ever touch the control circuit 2 Disconnect the connectors from the control circuit board 3 Remove screws securing the control box assembly 4 Remove the screw securing the ground tail of the keyboard 4 6 2 Removal of Ass y P C B Assembly 1 Remove screws securing the control circuit board 2 Lift up the control circuit board from the Ass y control box SCREWS ASSY PCB ...

Страница 11: ...ent or shorted magnetron 2 Isolate the magnetron from the circuit by disconnecting its leads 3 A continuity check across the magnetron filament terminals should indicate one ohm or less 4 A continuity check between each filament terminal and magnetron case should read open Primary Terminals Filament Terminals Secondary Terminal Magnetron Antenna Gasket Plate Cooling Fins PRECAUTION 1 High voltage ...

Страница 12: ...dy consult the figure 2 No specific adjustment during installation of Primary switch and Monitor switch to the latch body is necessary 3 When mounting the Latch Body to the oven assembly adjust the Latch Body by moving it so that the oven door will not have any play in it Check for play in the door by pulling the door assembly Make sure that the latch keys move smoothly after adjustment is complet...

Страница 13: ...edure will cause a variance in the temperature rise Additional power test should be made if temperature rise is marginal NOTE 2 Output power in watts is computed by multiplying the temperature rise step 5 by a factor of 91 times the of centigrade temperature 5 9 Microwave Heat Distribution Heat Evenness The microwave heat distribution can be checked indirectly by measuring the water temperature ri...

Страница 14: ...ven at the highest power level 4 Set survey meter dual ranges to 2 450MHz 5 Using the survey meter and spacer cone as described above measure near the opening of magnetron the surface of the air guide and the surface of the wave guide as shown in the following photo but avoid the high voltage components The reading should be less than 4mW cm2 5 12 Note on Measurement 1 Do not exceed the limited sc...

Страница 15: ... procedure Replace PCB main Timer starts countdown but no microwave oscillation No heat while oven lamp and fan motor turn on 1 Off alignment of latch switches 2 Open or loose connection of high voltage circuit especially magnetron filament circuit NOTE Large contact resistance will bring lower magnetron filament voltage and cause magnetron to lower output and or intermittent oscillation 3 Defecti...

Страница 16: ... main Loud buzzing noise can be heard 1 Loose fan and fan motor 2 Loose screws on H V Transformer 3 Shorted H V Diode Tighten screws of fan motor Tighten screws of H V Transformer Replace H V Diode Turntable motor does not rotate 1 Open or loose wiring of turntable motor 2 Defective turntable motor Replace turntable motor Oven stops operation during cooking 1 Open or loose wiring of primary interl...

Страница 17: ...C26 MC13 CUSHION GUIDE MD14 MD191 MD04 MD03 MD02 MD10 MD07 MD24 MC07 MD19 MM01 MM109 MM62 MM171 MM22 MM16 MM29 MM30 MM31 MM67 MM06 MM172 MM05 MM55 MM26 MM61 MM68 MM57 MM60 MM17 MM08 MM09 MM07 MM25 MM59 MM21 MM18 MM19 MM20 MM64 MM03 MM32 MM10 MM63 MD09 MD08 MM14 MM27 MM28 MB01 MB05 MB03 MB02 MM88 MB042 MB041 ...

Страница 18: ... 120 1 CAV TCO MM18 DE74 20102D TRAY COOKING GLASS T6 890g 1 MM19 DE97 00193B ASSY GUIDE ROLLER NC2000 0 6 T2 P1198 14PI 1 MM20 DE67 00140A COUPLER NC2000 0 6 0 8 PPS ESS840 3G BRN NEW 1 MM21 DE39 40409A WIRE HARNESS E 230V50HZ M9G45 CTW 1 H EART MM22 DE31 10154A MOTOR SYNCHRONOUS M2HJ49ZR02 ST 16 50 60HZ 1 MM25 DE65 20014A CABLE CLAMP NY 66 DA 6N 1 P CORD MM26 DE71 00148A COVER BLOWER MW850WA PP ...

Страница 19: ...M1727R CE2727R BWT PURE WHT CIS 1 MD02 DE64 00092F DOOR A CE2727R BWT ABS PURE WHT CTP 1 MD03 DE63 00017A SCREEN DOOR SAN SMOG M1727 M1777 1 MD04 DE94 00351D ASSY DOOR E COATING CE2877N XEC COATING 2ND NC2000 0 8CUFT 1 MD05 DE64 00221D FILM DOOR T0 15 W264 L143 NC08 GRILL 1 MD06 DE64 40008B DOOR C PP CE745G BLK 1 MD07 DE61 00198A SPRING KEY M1877 HSWR D6 23 1 4 23 1 4 T0 7 BLUING 1 MD08 DE61 00145...

Страница 20: ...4X12 TOOTHED 1 CON BOX DE60 10082H SCREW A 2S 4X12 TOOTHED 1 COVER AIR DE60 10082H SCREW A 2S 4X12 TOOTHED 4 OUT PANEL DE60 10098A SCREW ASSY TAP TITE GLD SWRCH18A ZPC2 PH TC M4X8 WT 1 BOTT TCO DE60 10098A SCREW ASSY TAP TITE GLD SWRCH18A ZPC2 PH TC M4X8 WT 1 CVT TCO DE60 10098A SCREW ASSY TAP TITE GLD SWRCH18A ZPC2 PH TC M4X8 WT 1 D MOTOR DE60 10098A SCREW ASSY TAP TITE GLD SWRCH18A ZPC2 PH TC M4...

Страница 21: ... 19 8 P C B Diagrams 8 1 P C B Diagrams ...

Страница 22: ...R01 02 04 05 13 14 1202 000141 IC VOLTAGE COMP 7033 SOT 89 3P SINGLE 0V P 1 IC03 1203 001037 IC VOLTAGE REGULATOR 78L05 SOT 89 3P 185MIL PLASTIC 1 IC02 1404 000230 THERMISTOR PTC 27ohm 20 265V 1 5A 360mA BK 1 PTC1 2007 000293 R CHIP 100OHM 5 1 8W DA TP 3216 7 R18 24 2007 000300 R CHIP 10KOHM 5 1 10W DA TP 2012 8 R02 05 11 13 17 2007 000468 R CHIP 1KOHM 5 1 10W DA TP 2012 4 R03 04 08 09 2007 000671...

Страница 23: ...APACITOR HIGH VOLTAGE DIODE TO CHASS MAGNETRON SYMBOL ORG BRN RED BLK COLOR ORANGE BROWN RED BLACK RED RED CONDITION OF OVEN DOOR IS OPENED BRN BROWN WHT WHITE RED RED BLK BLACK Y G YELLOW GREEN BLU BLUE ORG ORANGE YEL YELLOW COOK OFF WIRING COLOR 1 INPUT 230V 2 DOOR OPEN 3 LAMP ON 4 P C B PATTERN 5 P C B IN OUT POINT ...

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