Frigidaire PLMV178HC Service Manual Download

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MODEL : PLMV178HC

OVER - RANGE MICROWAVE OVEN

SERVICE MANUAL

! ATTENTION !

This service manual is intended for use by persons having electrical and mechanical training

and a level of knowledge of these subjects generally considered acceptable in the appliance

repair trade. Electrolux Home Products cannot be responsible, nor assume any liability, for

injury or damage of any kind arising from the use of this manual.

Part # 316439267

Publication # 5995526752

October 2008

Summary of Contents for PLMV178HC

Page 1: ...ectrical and mechanical training and a level of knowledge of these subjects generally considered acceptable in the appliance repair trade Electrolux Home Products cannot be responsible nor assume any liability for injury or damage of any kind arising from the use of this manual Part 316439267 Publication 5995526752 October 2008 ...

Page 2: ...ane Panel 16 5 9 Sensor 17 6 Alignment and Adjustments 18 6 1 High Voltage Transformer 18 6 2 Magnetron 18 6 3 High Voltage Capacitor 19 6 4 High Voltage Diode 19 6 5 Main Relay and Power Control Relay 19 6 6 Adjustment of Primary Switch Door Sensing Switch and Monitor Switch 19 6 7 Vent Exhaust Blower Motor 20 6 8 Thermal Cutout TCO S 21 6 8 1 Oven Thermal Cutout Flame sensor 21 6 8 2 Hood Therma...

Page 3: ...nd 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 shal...

Page 4: ... 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 and power relay as well as the Interlock Monitor Switch The correct adjustment of these switches is described elsewhere in this manual Make sure that the fuse has the correct rating for the particular model being repaired 13 Design Alteration Warning Use...

Page 5: ...in specified limits by close tolerance safety related components and adjustments If the high voltage exceeds the specified limits check each of the special components Fig 1 1 Discharging High Voltage Capacitor PRECAUTION There exists HIGH VOLTAGE ELECTRICITY with high current capabilities in the circuits of the HIGH VOLTAGE TRANSFORMER secondary and filament terminals It is extremely dangerous to ...

Page 6: ...NDS POWER SOURCE 120V 60Hz AC POWER CONSUMPTION MICROWAVE 1 650W OUTPUT POWER 1 000 W OPERATING FREQUENCY 2 450MHz MAGNETRON OM75P 10 COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 29 7 8 W x 16 1 2 H x 15 1 4 D NET WEIGHT 45 4 lbs SHIPPING WEIGHT 54 2lbs 46 7 lbs 52 0 lbs ...

Page 7: ...Page 4 3 Operating Instructions 3 1 Control Panel ...

Page 8: ...External Views OOR ANDLE ODEL AND 3ERIAL UMBER 0LATE 7IRE 2ACK 7INDOW WITH ETAL 3HIELD LASS 4URNTABLE OOKING UIDE 6ENT RILLE VEN ONTROL 0ANEL OOKTOP IGHT REASE ILTER OOR 3AFETY OCK 3YSTEM 387 3 mm 758 8 mm 419 1 mm 400 mm ...

Page 9: ...Page 6 3 3 Accessory Glass tray Roller guide ring Registration card Top template Wall template Installation instructions Use and Care Guide Hardware kit Grease filter Charcoal filter ...

Page 10: ...weight of 114 pounds This product cannot be installed to cabinet arrangements such as an island or peninsula It must be mounted to both a top cabinet and wall VENT BLOWER The vent or exhaust blower is located at the top of the oven It is shipped for recirculating exhaust but can be changed to rear exhaust or vertical See installation instrustions on how to change and or blower section on how to re...

Page 11: ... much heat rising from the cooktop below it If you have turned the fan on you may find that you cannot turn it The fan will automatically turn off when the internal parts are cool If may stay on for 30 minutes or more after the cooktop and microwave controls are turned off GRILLE REMOVAL The top full width grille is removable for service to some components such as oven light cavity T C O vent moto...

Page 12: ... the H V Trans 5 2 Replacement of Magnetron Remove the magnetron including the shield case permanent magnet choke coils and capacitors all of which are contained in one assembly 1 Disconnect all lead wires from the magnetron 2 Remove nuts 4 securing the magnetron to the wave guide 3 Take out the magnetron very carefully NOTE1 When removing the magnetron make sure that it antenna does not hit any a...

Page 13: ...ey door 5 3 4 Reassembly Test After replacement of the defective component parts of the door reassemble it and follow the instructions below for proper installation and adjustment so as to prevent an excessive microwave leakage 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 the upper hinge and lower hinge in the directio...

Page 14: ...ge transformer is defective FUSE 5 5 Replacement of Drive Motor 1 Disconnect power and remove bottom plate screws 7 2 Remove bottom plate and disconnect the turntable motor drive 3 Remove turntable motor screws 2 and pull the turntable motor out 4 When replacing the drive motor be sure to remount it in the correct position with the coupler 5 Connect all the leads to the drive motor DRIVE MOTOR 5 6...

Page 15: ...d pull the stirrer motor STIRRER MOTOR 5 7 Removal of stirrer The stirrer is motor driver and located on the upper side of the cavity The oven uses a top feed wave guide The stirrer is located in the wave guide and the motor is located on the wave guide 1 Disconnect power and open the door 2 Remove the clip and turn the stirrer cover left 3 Remove stirrer cover and the stirrer will come with it CL...

Page 16: ...ol circuit board from the Ass y control box 4 When reconnecting the FPC connector make sure that the holes on the connector are properly engaged with the hooks on the Plastic Fastener 5 8 3 Removal of Window Display Membrane Panel 1 Window display should not be disassembled as its mounting tabs will be broken If repair work is difficult replace with Ass y control panel 2 The membrane key board is ...

Page 17: ...ocated in the vent area at the top left hand corner of the cavity behind the grille To Service 1 Disconnect power and remove grille 2 Remove the sensor by removing screws 3 Mount the new sensor to the duct SENSOR TEST QUICK TEST 1 With 2 fingers touch and hold the following pads at the same time and 2 Observe diagnostic number in display Numbers approximate ex 33 Vs 39 Vout Vout Vaule 10 150 Norma...

Page 18: ...ck continuity 2 Normal resistance readings are as follows SHV U5164A Secondary Filament Primary 102 Ω 2 Shows Continuity 0 4 Ω 2 Room temperature 20 C 6 2 Magnetron 1 Continuity checks can indicate only an open filament or a shorted magnetron To diagnose an open filament or shorted magnetron 2 Isolate the magnetron from the circuit by disconnecting its leads 3 A continuity check across the magnetr...

Page 19: ...e with the wiring diagram and be sure to use the correct part number for the following switches Primary and secondary interlock switches and the interlock monitor switch replace all together Then follow the adjustment procedures below After repair and adjustment be sure to check the continuity of all interlock switches and the interlock monitor switch 1 When mounting Primary switch and Interlock M...

Page 20: ...h slower TO TEST THE CAPACITOR 1 Remove grille discharge capacitor and disconnect one capacitor lead 2 Make appropriate capacitor check with analog meter needle should rise then fall cap is charging then discharging TO TEST BLOWER WINDINGS 1 Disconnect power and remove grille 2 Open control panel and discharfe capacitor 3 Disconnent two wires to run capacitor Continuity test across the two wires s...

Page 21: ...se removed OVEN THERMAL CUTOUT 6 8 2 Hood Thermal Cutout This cutout will protect the touch control from excessive heat by turning the vent fan on at low speed If the surface units of the range are used for long periods of time heat will build up and could damage the microwave control In order to prevent this a thermal cutout is installed on the duct behind the control This cutout will close 158 F...

Page 22: ...e control box assembly 3 Remove two wire leads and unscrews one screw capturing cutout on base plate BOTTOM THERMAL CUTOUT HOOD THERMAL CUTOUT 6 8 4 Magnetron Thermal Cutout The magnetron thermal cutout is located above the leads to the magnetrons It is designed to prevent damage to the magnetron if an overheated condition develops in the tube to cooling fan failure obstructed air ducts dirty or b...

Page 23: ...et the oven to high power and operate for 45 seconds exactly 3 seconds included as a holding time of magnetron oscillation 4 When heating is finished stir the water again with the thermometer and measure the temperature T2 5 Subtract T1 from T2 This will give you the water temperature rise T 6 The output power is obtained by the following formula Output Power 4 187 x 1000 x T 0 55xMcx T2 T0 45 Hea...

Page 24: ...in a beaker which is graduated to 600cc and place the beaker in the center of the oven 3 Start the oven 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 compon...

Page 25: ...d HVTransformer NOTE2 Check adjustment of primary interlock monitor power relay door sensing switch NOTE 1 All of these switches must be replaced at the same time refer to adjustment instructions Check continuity of power relay contacts and if it has continuity replace power relay also NOTE 2 When HVTransformer is replaced check diode and magnetron also Oven does not accept key input Program 1 Key...

Page 26: ...PCB 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 int...

Page 27: ...Page 27 24 7 2 Error Code ERROR ERROR CASE SE Key Short Error 10 seconds E61 Open error Sensor unpluged wiring or smart board E62 Short error Shorted sensor or smart board ...

Page 28: ...ed Views 52 57 53 56 54 55 81 59 23 77 72 79 63 6 4 65 66 68 67 35 17 18 22 28 29 32 38 30 43 69 39 19 16 20 24 61 21 40 41 42 31 58 51 26 62 25 70 37 36 27 9 78 10 8 7 11 12 80 60 4 84 71 83 2 1 5 3 13 76 75 74 73 33 48 44 46 50 82 14 15 34 45 49 47 6 ...

Page 29: ...1629B ASSY DOOR 1 97 00600A ASSY BRACKET C PANEL 1 51 DE31 00033F MOTOR VENTILATION 1 SM7MGV 01 PCB 1 52 DE92 90508A ASSY HOLDER NUT 2 64 00766B WINDOW DISPLAY 1 53 DE64 01686A PANEL OUTER 1 94 01631E ASSY CONTROL BOX 1 54 DE71 60051B COVER DAMPER 1 96 00400A ASSY NOISE FILTER 1 55 DE72 40022A DAMPER MAIN 1 64 01816B INLAY DOOR 1 56 DE92 90242D ASSY HOOD DAMPER 1 64 01439D DOOR A 1 57 DE96 00218A ...

Page 30: ...Page 30 0 1 Schematic Diagrams 9 Schematic Diagrams 9 1 Schematic Diagrams ...

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