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1. 14 TEST PROGEDURBE uu L uuu up et eae eas 16 TOUCH CONTROL PANEL ASSEMBLY 20 nennen nennen nnns waa 28 COMPONENT REPLACEMENT AND ADJUSTMENT 2 34 PICTORIAL DIAG RAM conri tii pta osas ews 42 POWER UNIT CIRCUIT S 43 ESAU CUR GUT uu O E E E KAA WAWA EEE 44 PRINTED WIRINGBOARD u uuu iia 45 PARIS 46 PACKING AND ACCESSORIES ica add 48 This document has been published to be used for after sales service only The contents subject to change without notice ELECTROLUX HOME PRODUCTS INC P O Box 212378 Augusta GA 30917 800 944 9044 Publication 5995506226 P N 316439265 PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPO SURE TO EXCESSIVE MICROWAVE ENERGY a Do not operate or allow the oven to be operated with the door open b Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source and make repairs as necessary 1 interlock operation 2 proper door closing 3 seal and sealing surfaces arcing wear and other damage 4 damage to or loosening of hinges and latches 5 evidence of dropping or abuse c Before turning on microwave power for any service test or inspection within the microwave ge
2. BLK MAG TEMP FUSE ORG E BLK BLK ORG BLK NOE IE OVEN THERMAL 120VAC OVEN TH RED 60 Hz u a CONTROL UNIT mo N O com Do AS 52 771 R SECONDARY INTERLOCK y 7i RELAY 3 x RY4 o HOOD FAN POWER THERMAL RYS SWITCH TRANSFORMER CUT OUT NC amp RY3 5 I OVEN 5 RY6 RYT RY7 i I 5 HOOD RELAY 2 gt E CAPACITOR TURN s TABLE Stuf a an RELAY 51215 5 52 id wa ee HUMIDITY 28 A3 A9 7 N O COM c1 com ilz 55 3 SENSOR COM 5 9 3 HIGH 5 VOLTAGE H 2 CAPACITOR s H amp S xx UF TS de E E y 5 loo zi er E zi I WA TURN OVEN STIRRER HIGH z ga TABLE 2 LAMP MOTOR VOLTAGE 3 motor P RECTIFIER H 8 i aj E zo a gt lt x 55 a 777 177 Blu TEO war COM NOISE FILTER NOTES PRIMARY A INTERLOCK 1 Circuits subject to change without notice 2 Terminal with projection or opposite blue mark on lamp socket must be connected to neutral wire 3 Only certain models use the absolut
3. MAG TEMP FUSE ORG BLK ORG BLK no ORG OVEN THERMAL CUT OUT a RED e CONTROL UNIT Fa 20 N O d AS RY SECONDARY INTERLOCK x g RELAY HOOD FAN POWER s s THERMAL gt ars FATTOH TRANSFORMER CUT OUT NC amp RY3 5 9 RYD ane RY6 i z HOOD RELAY RY7 2 3 2 5 CAPACITOR TURN NC E zlii En 28 RELAY MONITOR E amp 5 5 is SWITCH E afele 5 2 4 HUMIDITY z 28 Ai as a9 a7 m o cifcom SENSOR ile 58 3 019 3 HIGH E MOTOR a RAE 5 VOLTAGE uw 3 2 2 CAPACITOR 5 amp xx UF 01515 E gt E EE Ir I 5 n 5 HOOD 3 3 33 ajale 5 LAMP 41915114 5 211 5 us 28 OVEN STIRRER FAN Ti HIGH z i LAMP MOTOR JI MOTOR ZE VOLTAGE an RECTIFIER 38 E 55 E 3 GRY 3 a WHT WHT 77 9 0 com NOISE FILTER NOTES PRIMARY 1 Circuits subject to change without notice SWITCH 2 Terminal with projection or opposite blue mark on lamp socket must be connected to neutral wire 3 Only certain models use the absolute humidity sensor 4 Power Transformer Start Lead terminal must be connected to hot wire RED Figure O 1 Oven Schematic Off Condition SCHEMATIC NOTE CONDITION OF OVEN 1 DOOR CLOSED 2 COOKING TIME PROGRAMMED 3 VARIABLE COOKING CONTROL HIGH
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5. lt 1S31 HOSN3S 3AVNOHOIN NOLLIQNOO nal 330 NOILIGNOO 15 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C PROCEDURE LETTER A TEST PROCEDURES COMPONENT TEST MAGNETRON ASSEMBLY TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 To test for an open filament isolate the magnetron from the high voltage circuit A continuity check across the magnetron filament leads should indicate less than 1 ohm 5 To test fora shorted magnetron connect the ohmmeter leads between the magnetron filament leads and chassis ground This test should indicate an infinite resistance If there is little or no resistance the magnetron is grounded and must be replaced Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions MICROWAVE OUTPUT POWER The following test procedure should be carried out with the microwave oven in a fully assembled condi tion outer case fitted HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE SO EXTREME CAUTION SHOULD BE OBSERVED Power output of the magnetron can be measured by performing a water temperature rise test T
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7. Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Isolate the switch and connect the ohmmeter to the common COM and normally open NO terminal of the switch The meter should indicate an open circuit with the door open and a closed circuit with the door closed If improper operation is indicated replace the door sensing switch Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions NOTE If the door sensing switch contacts fail in the open position and the door is closed the cooling fan motor stirrer motor and oven light will be activated by RY1 SECONDARY INTERLOCK RELAY RY2 Y O Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Disconnect two 2 wire leads from the male tab terminals of the Secondary Interlock Relay Check the state of the relay contacts using a ohmmeter The relay contacts should be open If the relay contacts are closed replace the circuit board entirely or the relay itself Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed R
8. Discharge high voltage capacitor Remove the hood exhaust louver from the oven cavity by pushing the right and left tabs of the hood exhaust louver Refer to the procedure of HOOD EXHAUST LOUVER REMOVAL 5 Remove door assembly refer to Door Replacement Replacement of door components are as follows 6 Place door assembly on a soft cloth with latches facing up Note Asthe engaging part of choke cover and door frame are provided at 15 places do not force any particular part CHOKE COVER 7 Insert a putty knife thickness of about 0 5mm into the gap A between the choke cover and door stopper and between the choke cover and the door frame as shown Figure C 3 to free engaging parts 8 Pry the choke cover by inserting a putty knife in order shown in Figure C 3 9 Now choke cover is free from door panel and door frame DOOR FRAME 10 Remove six 6 screws holding the door panel and the door handle to the door frame assembly 11 Release the door frame assembly from the door panel NOTE Itis easier to release the engaging parts of the upper or lower door hinge pin side at first 12 Now door frame assembly is free 41 LATCH SPRING LATCH HEAD AND DOOR PANEL 13 Release the latch spring from the tab of the latch head and tab of the door frame 14 Release the latch head from the door frame 15 Now the latch spring latch head and door frame are free Door Frame Figure C 3 Door Disassembly
9. Push Hood exhaust louver Tab right to remove 5 1 2 3 RO 8 9 Remove the louver covers A B and C from the hood 6 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C exhaust louver Now the hood exhaust louver is free REMOVAL OF OVEN FROM WALL Two persons recommended to remove the oven Remove the turntable tray and support from the oven cavity Remove the one 1 screw holding the exhaust damper assembly to the rear stay and remove the exhaust damper assembly by sliding it backward Remove the two 2 screws holding the oven outer case cabinet to the top cabinet Remove the hood exhaust louver referring to HOOD EXHAUST LOUVER REMOVAL While supporting the front of the oven unfasten the two Disconnect the power supply cord and uncoil the power supply cord 2 unit mounting screws holding the oven to the unit mounting plate Remove the oven by sliding it into the arms of the unit mounting plate and pull the power cord out of the wall cabinet The oven is now free and can be placed on the work surface selected for servicing the oven Installation is the reverse of this procedure OUTER CASE REMOVAL Remove the oven from the wall and proceed as follows Disconnect the power supply cord Open the door and block it open Remove three 3 screws holding the hood exhaust louver to the oven and pull it forward to remove by pushing
10. The oven will not operate unless the door is securely closed 7 Auto Touch control panel 8 Time display Digital display 99 minutes 99 seconds 050 SOV 9 Ventilation openings 10 Light Cover 11 Grease filters 12 Removable turntable The turntable will rotate clockwise or counterclockwise Only remove for cleaning 13 Removable turntable support 14 Power supply cord CONTROL PANEL SENSOR COOKING Baked Potatoes ensor Reheat Beverage Popcorn Frozen Entrees Frozen Ground 4 Veggie Meat Fresh Veggie i m anl um cu M A Dinner d Items Breakfast Items Spee Auto Defrost Defrost Memory Cook Timer Pause GLMV169GBB GLMV169GSB GLMV169GQB PLMVZ169GCC Colors will vary OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions dur ing oven operation OFF CONDITION Closing the door activates the door sensing switch and secondary interlock switch In this condition the monitor switch contacts are opened When oven is plugged in 120 volts A C is supplied to the control unit Figure O 1 1 The display will show WELCOME PRESS CLEAR AND PRESS CLOCK To set any program or set the clock you must first touch the STOP CLEAR pad The display will clear and w
11. DOOR GLASS 16 Remove the glass stopper from the door frame by releasing the tab of door frame 17 At first slide the door glass toward the glass stopper side and then slide it up And release it from the right and lower long tabs of the door frame 18 Release the door glass from the upper long tab of the door frame 19 Release the door glass from the long tabs of the door frame 20 Now the door glass is free GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C e14019Id 1 5 91NBIY HOLON ANGLIN Buppen bye enig me OO TH3LNI AMV aseg 1uBr 5137005 9 1109 HOLIMS YOLINOW 351314933 3SV11OA YOLIOVAVO 3SV11OA H9IH SININOdAWNO9 HOIH asna NOY L3N9OVMN o Y3MOd 1no 1n9 LINN IOHLNOO IVAY3HL ALIAVO YOLOW Y3IYHLLS 191205 9 dNV1N3AO LHM Bupe enig
12. Power 9 P 90 30 sec 2 sec approx 90 power Power 8 P 80 26 sec 6 sec approx 80 power Power 7 P 70 24 sec 8 sec approx 70 power Power 6 P 60 22 sec 10 sec approx 60 power Power 5 P 50 18 sec 14 sec approx 50 power Power 4 P 40 16 sec 16 sec approx 40 power Power 3 P 30 12 sec 20 sec approx 30 power Power 2 P 20 8 sec 24 sec approx 20 power Power 1 P 10 6 sec 26 sec approx 10 power Power 0 0 sec 32 sec 0 power 2 220 0 2 Note The ON OFF time ratio does not correspond with the percentage of microwave power because approx 2 seconds are needed for heating of the magnetron filament GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB PLMVZ169GCC BREAKFAST LUNCH DINNER BREAKFAST LUNCH DINNER will automatically compute the microwave power and cooking time the desired pro gram bytouching one ofthe BREAKFAST LUNCH DINNER pads and number pad to select menu Enter the weight or quantity by touching the Number pads When the START pad is touched the following operations occur 1 The COOK indicator will light 2 The cooking time will appear on the display and start counting down to zero The cooking time is adjusted automatically according to the weight of the food The shut off relays RY1 RY2 and RY3 are energized turning on the oven lamp turntable motor cooling fan motor and convection motor The pow
13. COM2 Connected to LCD signal COM2 Common data signal COM1 Connected to LCD signal COM1 Common data signal COM0 Connected to LCD signal COMO Power source voltage input terminal Standard voltage for LCD GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB PLMVZ169GCC NOTES 31 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C ABSOLUTE HUMIDITY SENSOR CIRCUIT 1 Structure of Absolute Humidity Sensor ventilation opening for sensing The absolute humidity sensor includes two thermistors as shown in the illustration One thermistor is housed in the closed vessel filled with dry air while another in the open vessel Each sensor is provided with the protective cover made of metal mesh to be protected from the external airflow Thermistors Sensing part Open vessel Sensing part Closed vessel ZE bal lt 44 O O SN 2 Operational Principle of Absolute Humidity Sensor The figure below shows the basic structure of an absolute humidity sensor A bridge circuit is formed by two thermistors and two resistors R1 and R2 The output of the bridge circuit is to be amplified by the operational amplifier Each thermistor is supplied with a current to keep it heated at about 150 C 302 F the resultant heat is dissipated in the air and if the two thermistors are placed in different humidity conditions they show different degrees of
14. of the terminals and case If it is shorted replace the capacitor Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions ONDA CAVITY THERMAL CUT OUT TEST Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor A continuity check across the thermal cut out terminals should indicate a closed circuit unless the temperature of the thermal cut out reaches approximately 293 F 145 C An open thermal cut out indicates overheating of the oven exchange the oven thermal cut out and check inside of oven cavity and for improper setting of cooking time or operation of control unit Check for restricted air flow through the vent holes of the oven cavity especially the cooling fan and air guide Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions MAGNETRON TEMPERATURE FUSE TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Acontinuity check across the magnetron temperature fuse terminals should indicate a closed circuit unless the temperature of the magnetr
15. the touch control panel assembly is divided into two units Control Unit and Key Unit and also the Control Unit is divided into two units LSI Unit and Power Unit and troubleshooting by unit replacement is described according to the symptoms indicated Before testing 1 Disconnect the power supply cord and then remove outer case Refer to procedure of HOOD EXHAUST LOUVER REMOVAL REMOVAL OF OVEN FROM WALL and OUTER CASE REMOVAL 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure re connect the power supply cord 1 Key Unit NOTE 1 Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Check key unit ribbon connection before replacement Reconnect all leads removed from components during testing Re install the outer case cabinet Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions The following symptoms indicate a defective key unit a When touching the pads a certain pad produces no signal at all b When touching a number pad two figures or more are displayed c When touching the pads sometimes a pad produces no signal If the key unit is defecti
16. Remove one 1 screw holding the hood duct to oven cavity 6 Release the wire leads from the hole of the hood duct 7 Lift up the fan motor side of the hood duct 8 Remove the two 2 screws holding the fan motor to the hood duct 9 Remove the fan blade from the fan motor shaft according the following procedure 10 Hold the edge of the rotor of the fan motor by using a pair of groove joint pliers CAUTION Make sure that any pieces do not enter the gap between the rotor and the stator of the fan motor because the rotor is easily shaven by pliers and metal pieces may be produced Do not touch the pliers to the coil of the fan motor because the coil may be cut or injured Do not disfigure the bracket by touching with the pliers 11 Remove the fan blade from the shaft of the fan motor by pulling and rotating the fan blade with your hand 37 12 Now the fan blade will be free CAUTION Do not reuse the removed fan blade because the hole for shaft may be larger than normal 13 Now the fan motor is free Coi Groove joint pliers Q O 9 N Stator Gap Bracket Rotor Jl d Rear View Sha al are the positions Axis Gr that should be pinched Sui with pliers Rotor A Side View INSTALLATION 1 Install the fan blade to the fan motor shaft according to the foll
17. WARNING The oven should be fully assembled before following procedure 1 The oven should be plugged in at least two minutes before sensor cooking 2 Room temperature should not exceed 95 F 35 C 3 The unit should not be installed in any area where heat and steam are generated The unit should not be installed for example next to a conventional surface unit Refer to the INSTALLATION INSTRUCTIONS of the operation manual 4 Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity To permit adequate ventilation be sure to install so as not to block these vents There should be some space for air circulation 5 Be sure the exterior of the cooking container and the interior of the oven are dry Wipe off any moisture with a dry cloth or paper towel 6 The Sensor works with food at normal storage temperature For example chicken pieces would be at refrigerator temperature and canned soup at room temperature 7 Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings The sensor will detect the vapour given of by the spray and turn off before food is properly cooked 8 If the sensor has not detected the vapour of the food ERROR will appear and the oven will shut off Water load cooking test WARNING The oven should be fully assembled before following procedure Make sure the oven has been plugged in at least two minutes before checking sensor cook oper
18. current contact with following parts may result in a severe possibly fatal electrical shock Example High Voltage Capacitor High Voltage Power Transformer Magnetron High Voltage Rectifier Assembly High Voltage Harness etc Read the Service Manual carefully and follow all instructions Before Servicing 1 Disconnect the power supply cord Z and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor WARNING RISK OF ELECTRIC SHOCK DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING The high voltage capacitor remains charged about 60 seconds after the oven has been switched off Wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver Whenever troubleshooting is performed the power supply must be disconnected It may in some cases be necessary to connect the power supply after the outer case has been removed in this event 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect the power supply cord Don t Touch
19. final air discharge is directed horizontally through the upper front of the oven into the kitchen IN this case the accessory charcoal filter RK 230 must be provided to filter the air before it leaves the oven AIR FLOW HOOD EXHAUST CHARCOAL FILTER HOOD FAN MOTOR LOUVER ae tessa ee cee a HOOD INTAKE DUCT SENSOR COOKING CONDITION Using the SENSOR function food is cooked without figur ing time power level or quantity When the oven senses enough steam from the food it relays the information to its microprocessor which will calculate the remaining cooking time and power level needed for best results When the food is cooked water vapor is developed the sensor senses the vapor and its resistance increase gradually When the resistance reaches the value set according to the menu supplementary cooking is started The time of supplementary cooking is determined by experi ment with each food category and inputted into the LSI An example of how sensor works Potatoes 1 Potatoes at room temperature Vapor is emitted very slowly 2 Heat Potatoes Moisture and humidity is emitted very rapidly You can smell the aroma as it cooks Mic AH SENSOR Roy S Cooking Sequence 1 Touch one of the Sensor Cooking pads And then touch START TOUCH ON pad NOTE The oven should not be operated on Sensor Cooking immediately after plugging in the unit Wait two minutes
20. high voltage capacitor 4 Push the lever of positive lock connector 5 Pull down on the positive lock connector CAUTION WHEN CONNECTING THE POSITIVE LOCK CONNECTORS TOTHETERMINALS INSTALL THE POSITIVE LOCK SO THAT THE LEVER Terminal Positive lock connector Lever Positive lock connector DOOR SENSING SWITCH SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open Discharge high voltage capacitor Remove the control panel assembly referring to the procedure of CONTROL PANEL ASSEMBLY CONTROL UNIT AND KEY UNIT REMOVAL Remove the two 2 screws holding the latch hook to the oven cavity front flange Remove the latch hook from the oven cavity front flange Disconnect the wire leads of each switch Remove each switch from the latch hook by pushing the one 1 stopper tub holding each switch 39 9 Now each switch is free Re install 1 Re install each switch its place The secondary interlock switch is in the lower position door sensing switch is in the upper position is in the upper vertical position and the monitor switch is in the middle position Re connect wire leads to each switch Refer to pictorial diagram Secure the latch hook with two
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22. lead of the transformer from the 16 Remove the lamp socket from the lamp angle 17 Pull the wire leads from the oven lamp socket by pushing the terminal hole of the oven lamp socket with a small flat type screw driver 18 Now the oven lamp socket is free 19 Release the harness of the AH sensor assembly from three 3 wire holders of the hood duct 20 Remove two 2 screws holdingthe AH sensor assembly to the hood duct 21 Now the AH sensor assembly is free Oven lamp socket RN s lt lt Terminal hole Flate type small magnetron screw driver 9 Remove the power transformer from the right base plate referring to POWER TRANSFORMER REMOVAL Carefully remove four 4 mounting screws holding the magnetron to waveguide When removing the screws hold the magnetron to prevent it from falling 11 Remove the magnetron from the unit with care so the magnetron tube should not be hit by any metal object around the tube 12 Remove the one 1 screw holding the magnetron air guide to the magnetron 13 Remove the magnetron air guide CAUTION WHEN REPLACING THE MAGNETRON BE SURE THE R F GASKET IS IN PLACE AND MOUNTING SCREWS ARE TIGHTENED SE CURELY 10 HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL 1 Disconnect the power supply cord remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal 2 Open the door and block it op
23. the digital read out displays the time still remaining in the cook cycle when the door was opened 7 The monitor switch is electrically monitoring the operation of the primary interlock switch and door sensing switch is mechanically associated with the door so that it will function in the following sequence 1 When the door opens from a closed position the secondary interlock relay door sensing switch and primary interlock switch open their contacts and then the monitor switch contacts close 2 When the door is closed from the open position the monitor switch contacts open first Then the contacts of the primary interlock switch and door sensing switch close And contacts of the relay RY1 open If the primary interlock switch and secondary interlock relay RY2 fail with the contacts closed when the door is opened the closing of the monitor switch contacts will form a short circuit through the monitor fuse primary interlock switch relay RY1 and secondary interlock relay RY2 causing the monitor fuse to blow POWER LEVEL P 0 TO P 90 COOKING When Variable Cooking Power is programmed the 120 volts A C is supplied to the power transformer intermittently through the contacts of relay RY2 which is operated by the control unit within an interval second time base Microwave power operation is as follows VARI MODE OFFTIME Power 10 32 sec 0 sec 100 power
24. the wave guide or oven cavity are not intact 3 If the door is not closed 4 If the outer case cabinet is not fitted WARNING FOR WIRING 3 Sharp edge Bottom plate Oven cavity Waveguide flange Chassis support and other metallic plate 4 Movable parts to prevent a fault Fan blade Fan motor Switch Switch lever Open button 3 Do not catch the wire leads in the outer case cabinet 4 Insert the positive lock connector until its pin is locked and make sure that the wire leads do not come off even if the wire leads are pulled 5 To prevent an error function connect the wire leads correctly referring to the Pictorial Diagram Please refer to OVEN PARTS CABINET PARTS CONTROL PANAL PARTS DOOR PARTS when carrying out any of the following removal procedures THE FOLLOWING ADJUSTMENTS OR COMPONENT REPLACEMENT CAN BE PERFORMED WITHOUT REMOVING THE OVEN FROM THE WALL Hood lamps sockets and grease filter Oven lamp base cover and hood lamp glass assembly Turntable motor N HOOD EXHAUST LOUVER REMOVAL k Disconnect the power supply cord Open the door and block it open 3 Remove the three 3 screw holding the hood exhaust louver to the oven cavity 4 Pull the hood exhaust louver from the oven cavity by pushing the right and left tabs of the hood exhaust louver 4 Hood exhaust louver 5 Control panel assembly or components 6 Stirrer cover and stirrer fan
25. to the oven door being closed Connect an external power source to the power input terminal of the touch control panel then it is possible to check and repair the controls of the touch control panel it is also possible to check the sensor related controls of the touch control panel by using the dummy resistor s Servicing Tools Tools required to service the touch control panel assembly Soldering iron 30W Itis recommendedto use a soldering iron with a grounding terminal Oscilloscope Single beam frequency range DC 10MHz type or more advanced model Others Hand tools Other Precautions Before turning on the power source of the control unit remove the aluminium foil applied for preventing static electricity Connect the connectors of the key unit to the control unit being sure that the lead wires are not twisted 3 After aluminium foil is removed be careful that abnormal voltage due to static electricity etc is not applied to the input or output terminals 4 Attach connectors electrolytic capacitors etc to PWB 5 making sure that all connections are tight Be sure to use specified components where high precision is required GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING AGAINST HIGH VOLTAGE Microwave ovens contain circuitry capable of producing very high voltage and current contact with following parts may result in severe po
26. wire leads from transformer 10 Remove two 2 screws holding the transformer to right base plate Re install 2 3 5 6 Install by sliding the transformer on the right base plate with its primary terminals toward the outer case Secure the transformer with two 2 screws to right base plate Re connect wire leads primary and high voltage to the transformer and filament leads of transformer to magnetron and high voltage capacitor Refer to PICTORIAL DIAGRAM Re install the hood duct holding the fan motor to the oven cavity front flange with one 1 screw Re connect the wire leads to the chassis support and the fan motor referring to PICTORIAL DIAGRAM Re install the outer case and check that oven 15 operating properly CAUTION MAKE SURE THE WIRE LEADS NEVER TOUCH THE FAN BLADE HOOD FAN MOTOR HOOD DUCT OVEN LAMP SOCKET REMOVAL AND AH SENSOR REMOVAL 1 Disconnectthe power supply cord and remove the ovenfrom wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal of the base model Service Manual 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the 6 pin connector of the hood fan motor from the main wire harness located at the right edge of the hood duct and release the snap band from the hood duct 5 Remove the hood fan motor from the hood duct by lifting it up 6 Now the hood fan mo
27. 2 balance the bridge circuit is deviated to increase the voltage available at AN1 terminal of the LSI Then the LSI observes that voltage at AN1 terminal and compares it with its initial value and when the comparison rate reaches the preset value fixed for each menu to be cooked the LSI causes the unit to stop sensor cooking thereafter the unit goes in the next operation automatically When the LSI starts to detect the initial voltage at AN1 terminal 16 seconds after the unit has been put in the Sensor Cooking mode if it is not possible to balance of the bridge circuit due to disconnection of the absolute humidity sensor ERROR will appear on the display and the cooking is stopped 1 Absolute humidity sensor circuit 300k R100 150k R102 37 4k C Thermistor in closed vessel S Thermistor in open vessel VC 5V VA 15V 15V GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C SERVICING 1 Precautions for Handling Electronic Components 4 Re install the outer case cabinet This unit uses CMOS LSI in the integral part of the circuits 5 Re connect the power supply cord after the outer When handling these parts the following precautions case is installed should be strictly followed CMOS LSI have extremely 6 Run the oven and check all functions high impedance at its input and output terminals For A On some models the power supply cord between the this reason it is easily influen
28. 2 mounting screws to oven cavity front flange Make sure that the monitor switch is operating properly and check continuity of the monitor circuit Refer to chapter Test Procedure and Adjustment procedure GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C DOOR SENSING SWITCH PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open Discharge high voltage capacitor Remove the control panel assembly referring to the procedure of CONTROL PANEL ASSEMBLY CONTROL UNIT AND KEY UNIT REMOVAL If the door sensing switch primary interlock switch and moni tor switch do not operate properly due to a misadjustment the following adjustment should be made 5 Loosen the two 2 screws holding latch hook to the oven cavity front flange With door closed adjust latch hook by moving it back and forth and up and down In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0 5mm The vertical position of the latch hook should be adjusted so that the door sensing switch secondary interlock switch are activated with the door closed The horizontal position of the latch hook should be adjusted so that the monitor switch is activated with the door closed Secure the screws with washers f
29. 26 When a key pad is touched a signal is completed through the key unit and passed back to the LSI through P43 P44 P45 and P46 to perform the function that was requested Control Unit Control unit consists of LSI power source circuit synchro nizing signal circuit reset circuit buzzer circuit relay circuit indicator circuit and back light circuit 1 LSI This LSI controls the key strobe signal relay driving signal for oven function and indicator signal 2 Power Source Circuit This circuit generates voltages necessary for the control unit from the AC line voltage In addition the synchronizing signal is available in order to compose a basic standard time in the clock circuit Symbol Voltage VC 5 3V Application LSI IC1 3 Synchronizing Signal Circuit The power source synchronizing signal is available in order to compose a basic standard time in the clock cir cuit It incorporates a very small error because it works on commercial frequency 4 Reset Circuit A circuit to generate a signals which resetting the LSI to the initial state when power is applied 5 Buzzer Circuit The buzzer is responds to signals from the LSI to emit audible sounds key touch sound and completion sound 6 Door Sensing Switch A switch to inform the LSI if the door is open or closed 7 Relay Circuit To drive the magnetron fan motor turntable motor hood motor and light the oven lamp and hood lamp 8 Indicator Circ
30. Danger High Voltage When the testing is completed 1 Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Reconnect the leads to the primary of the power transformer 5 Reinstall the outer case cabinet 6 Reconnect the power supply cord after the outer case is installed 7 Run the oven and check all functions After repairing 1 Reconnect all leads removed from components during testing 2 Reinstall the outer case cabinet 3 Reconnect the power supply cord after the outer case is installed 4 Run the oven and check all functions Microwave ovens should not be run empty To test for the presence of microwave energy within a cavity place a cup of cold water on the oven turntable close the door and set the power to HIGH and set the microwave timer for two 2 minutes When the two minutes has elapsed timer at zero carefully check that the water is now hot If the water remains cold carry out Before Servicing procedure and re examine the connections to the component being tested When all service work is completed and the oven is fully assembled the microwave power output should be checked and microwave leakage test should be carried out A 1 gt MICROWAVE MEASUREMENT PROCEDURE Requirements Microwave leakage limit Power density limit The power density of microwave radiation emitted by a microwave ov
31. ELECTROLUX SERVICE MANUAL S37M277MV169G OVER THE RANGE MICROWAVE OVENS MODELS GLMV169GSA GLMV169GSB GLMV169GBA GLMV169GBB GLMV169GQA BLMV169GQB PLMVZ169GCA PLMVZ169GCB PLMVZ169GCC GLMV169GBB In the interest of user safety the oven should be restored to its original condition and only parts identical to those specified should be used WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of producing very high voltage and current Contact with the following parts may result in a severe possibly fatal electrical shock High Voltage Capaci tor High Voltage Power Transformer Magnetron High Voltage Rectifier Assembly High Voltage Harness etc TABLE OF CONTENTS Page PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE INSIDE FRONT COVER BEFORE SERVICING uu au huy y n m lancia INSIDE FRONT COVER WARNING TO SERVICE PERSONNLLLI r EEES Ana ear ie iniia nenene EiE 3 MICROWAVE MEASUREMENT PROCEDURBE Tl 4 FOREWORD AND 5 PRODUCT SPEGCIFIGATIONS labia cial sten aues sten ieina 6 GENERAL INFORMATION ia ii AA esc oe xe stes tu ed ED 6 OPERATION uu Z Au lala 9
32. TIFIER TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Isolate the rectifier from the circuit Using the highest ohm scale of the meter read the resistance across the terminals and observe reverse the leads to the rectifier terminals and observe meter reading If a short is indicated in both directions or if an infinite resistance is read in both directions the rectifier is probably defective and should be replaced Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions NOTE Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6 3 volts D HIGH VOLTAGE CAPACITOR TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 If the capacitor is open no high voltage will be available to the magnetron isconnect input leads and check for short or open between the terminals using an ohmmeter Checking with a high ohm scale if the high voltage capacitor is normal the meter will indicate continuity for a short time and should indicate an open circuit once the capacitor is charged If the above is not the case check the capacitor with an ohmmeter to see if it is shorted between either
33. Y1 and RY2 Relay Test These relays are operated by D C voltage Check voltage at the relay coil with a D C voltmeter during the microwave cooking operation DC voltage indicated Defective relay DC voltage not indicated Check diode which is connected to the relay coil If diode is good control unit is defective RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS RY1 Approx 24 0V D C Oven lamp Fan motor Stirrer motor RY2 COOK Approx 24 0V D C Power transformer RY3 Approx 24 0V D C Turntable motor ____8 4 Approx2e40VD C Hood motor __________________ RY5 Approx 24 0V D C Hood motor HIGH LOW selection 8 Disconnect the power supply cord and then remove outer case 9 Open the door and block it open 10 Discharge high voltage capacitor 11 Reconnect all leads removed from components during testing 12 Re install the outer case cabinet 13 Reconnect the power supply cord after the outer case is installed 14 Run the oven and check all functions N COMPU DEFROST TEST 1 Place one cup of water in the center of the turntable tray in the oven cavity 2 Close the door touch the Auto Defrost pad twice and touch the Number pad 5 And then touch the START pad 3 The oven is in Compu Defrost cooking condition 4 The oven will operate as follows WEIGHT 1ST STAGE 2ND STAGE 3RD STAGE 4TH STAGE LEVEL TIME LEVEL TIME LEVEL TIME LEVEL TIME 0 5165 70 30sec 50 30sec 40 30sec 30 30sec 5 If im
34. Z00 NL v0 0 H rSi vd ALLPOOL ISYA ircui Figure S 2 Power Unit C 43 HUN IST S 430 81 HOSN3S 000 zzwazztwsaoty 097 GLMV169GSB GLMV169GBB GLMV169GGB PLMVZ169GCB C 44 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C Figure S 5 Printed Wiring Board 45 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C 5 INT OVEN AND CABINET PARTS 46 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C DOOR PARTS 5 6 CONTROL PANEL PARTS MISCELLANEOUS 47 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C PACKING AND ACCESSORIES TOP PAD DOOR PROTECTOR 38 TURNTABLE TRAY tom INSTALL MATERIAL ASSEMBLY OPERATION MANUAL gt RACK WALL TEMPLATE RACK HOLDER lt gt INSTALLATION INSTRUCTION ES TOP TEMPLATE lt gt GREASE FILTER x 2 lt gt DAMPER ASSEMBLY A BOTTOM PAD ACCESSORY HOLDER Non replaceable items PACKING CASE GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C ELECTROLUX COPYRIGHT 2007 BY ELECTROLUX HOME PRODUCTS INC ALL RIGHTS RESERVED No part of this publicatio
35. al is input to P43 P46 terminal while one of G7 line keys on key matrix is touched Key strobe signal Signal applied to touch key section A pulse signal is input to P43 P46 terminal while one of G6 line keys on key matrix is touched Terminal not used Terminal not used Key strobe signal Signal applied to touch key section A pulse signal is input to P43 P46 terminal while one of G3 line keys on key matrix is Key strobe signal Signal applied to touch key section A pulse signal is input to P43 P46 terminal while one of G2 line keys on key matrix is touched Key strobe signal Signal applied to touch key section A pulse signal is input to P43 P46 terminal while one of Gi line keys on key matrix is touched Terminal not used Hood lamp driving signal To turn on and off relay RY5 L level During Hood lamp ON H level During Hood lamp OFF Terminal not used Hood motor driving signal To turn on and off relay RY4 L level During Hood motor ON H level During Hood motor OFF P13 P11 Terminal not used 48 50 SEG24 SEG22 Terminal not used SEG21 SEGO Segment data signal Connected to LCD The relation between signals are as follows LSI xd No LCD Pin No LSI signal Pin No LCD Pin No SEG 10 62 SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG Connected to VC Terminal not used Common data signal
36. al power source 2SB1238 KRC243M Disconnect the touch control panel completely from the cB oven proper and short both ends of the door sensing 3 Servicing of Touch Control Panel switch on PWB of the touch control panel which We describe the procedures to permit servicing of the touch control panel of the microwave oven and the precautions you must take when doing so To perform the servicing power to the touch control panel is available either from the power line of the oven itself or from an external power source 1 Servicing the touch control panel with power supply of the oven CAUTION THE HIGH VOLTAGE TRANSFORMER OF THE MICROWAVE OVEN IS STILL LIVE DURING SERVICING AND PRESENTS A HAZARD Therefore before checkingthe performance ofthe touch control panel 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure re connect the power supply cord After checking the performance of the touch control panel 1 Disconnect the power supply cord 2 Open the door and block it open 3 Re connect the leads to the primary of the power transformer 2 2 3 5 1 2 activates an operational state that is equivalent
37. ation The cabinet should be installed and screws tightened 1 Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup 2 Place the container on the center of tray in the oven cavity 3 Close the door 4 Touch Sensor reheat pad once and touch the Start pad Now the oven is in the sensor cooking condition and SENSOR REHEAT and COOK will appear in the display 5 The oven will operate for the first 16 seconds without generating microwave energy NOTE ERROR will appear if the door is opened or Clear Off pad is touched during first stage of sensor cooking 6 After approximately 32 seconds microwave energy is produced and the display should start to count down the remaining cooking time and oven should turn off after water is boiling bubbling If the oven does not turn off replace the AH sensor or check the control unit refer to explanation below TESTING METHOD FOR AH SENSOR AND OR CONTROL UNIT To determine if the sensor is defective the simplest method is to replace it with a new replacement sensor 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Remove the AH sensor 5 Install the new AH sensor 6 Reconnect all leads removed from components during replacing 7 Re install the outer case cabinet 8 Reconnect the power supply cord after the outer case is installed 9 Reconnect the o
38. be used to assure compliance with proper microwave radiation emission limitation standards 4 5 6 7 After any servicing make sure of the following 1 Door latch heads smoothly catch latch hook through latch holes and that latch head goes through center of latch hole Deviation of door alignment from horizontal line of cavity face plate is to be less than 1 0mm Door is positioned with its face pressed toward cavity face plate Re install outer case and check for microwave leakage around door with an approved microwave survey meter Refer to Microwave Measurement Procedure Note The door on a microwave oven is designed to actas an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle This function does not require that door be air tight moisture condensation tight or light tight Therefore occasional appearance of moisture light or sensing of gentle warm air movement around oven door is not abnormal and do not of themselves indicate a leakage of microwave energy from oven cavity GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB PLMVZ169GCC Upper Door Hige Pin Lower Door Hige Pin Figure C 2 Door Replacement and adjustment DOOR DISASSEMBLY 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open
39. before cooking on Sensor Cooking 2 The coil of shut off relays RY1 and RY3 are energized the oven lamp turntable motor and cooling fan motor are turned on but the power transformer is not turned on 3 After about 32 seconds the cook relay RY2 is energized The power transformer is turned on microwave energy is produced and first stage is started The 32 seconds is the cooling time required to remove GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C any vapor from the oven cavity and sensor NOTE During this first stage do not open the door or touch STOP CLEAR pad 4 When the sensor detects the vapor emitted from the food the display switches over to the remaining cooking time and the timer counts down to zero At this time the door may be opened to stir food turn it or season etc 5 When the timer reaches zero an audible signal sounds The shut off relay and cook relay are de energized and the power transformer oven lamp etc are turned off 6 Opening the door or touching the STOP CLEAR pad the time of day will reappear on the display and the oven will revert to an OFF condition GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB PLMVZ169GCC SCHEMATIC NOTE CONDITION OF OVEN 1 DOOR CLOSED 2 CLOCK APPEARS ON DISPLAY BLK
40. but also to insure that any leakage is measured accurately Set the cooking control on Full Power Cooking Mode Close the door and select a cook cycle of several minutes If the water begins to boil before the survey is completed replace it with 275 ml of cool water Leakage test Closed door leakage test microwave measurement 1 2 3 4 Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven Move the probe slowly not faster than 1 in sec 2 5 cm sec along the gap watching for the maximum indication on the meter Check for leakage at the door screen sheet metal seams and other accessible positions where the continuity of the metal has been breached eg around the switches indicator and vents While testing for leakage around the door pull the door away from the front of the oven as far as is permitted by the closed latch assembly Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW cm and that the primary interlock switch secondary interlock relay does turn the oven OFF before any door movement NOTE After servicing record data on service invoice and microwave leakage report SERVICE MANUAL ELECTROLUX OVER THE RANGE MICROWAVE OVEN GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCC FOREWORD This Manual has been prepared to provide Electrolux Home Prod ucts Service Personne
41. ced by the surrounding touch control panel and the oven itself is so short that high voltage power source static electricity charge in the two can t be separated For those models check and clothes etc and sometimes it is not fully protected by repair all the controls sensor related ones included of the built in protection circuit the touch control panel while keeping it connected to In order to protect CMOS LSI the oven 1 When storing and transporting thoroughly wrap them in B On some models the power supply cord between the aluminium foil Also wrap all PW boards containing them touch control panel and the oven proper is long enough in aluminium foil that they may be separated from each other For those 2 When soldering ground the technician as shown in the models it is possible to check and repair the controls of figure and use grounded soldering iron and work table the touch control panel while keeping it apart from the oven proper in this case you must short both ends of the door sensing switch PWB of the touch control panel with ajumper which activates an operational state that is equivalent to the oven door being closed As for 2 Shapes of Electronic Components the sensor related controls of the touch control panel checking them is possible if dummy resistor s with resistance equal to that of the controls are used 2 Servicing the touch control panel with power supply Transistor Transistor from an extern
42. e 7 Now the hood fan thermal cut out is free GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C THERMAL CUT OUT CAVITY REMOVAL 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open Discharge high voltage capacitor Remove two 2 unit mounting screws Remove the hood duct Refer to the procedure of HOOD FAN MOTOR HOOD DUCT AND OVEN LAMP SOCKET REMOVAL 6 Straighten the tab holding the thermal cut out to the top plate of the oven cavity Release the thermal cut out cavity from the one slit of the oven cavity top plate 8 Disconnect the wire leads from the thermal cut out cavity OP 9 Now the thermal cut out cavity is free NOTE When the tab is broken or turned off use the another tab which is fixed near the slit when the new thermal cut out is replaced Top of Oven Cavity E Thermal Cut Out Cavity Thermal Cut Out Thermal Cut Out 86 Tab COOLING FAN MOTOR REMOVAL 1 Disconnect the power supply cord remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open Discharge high voltage capacitor Disconnect the wire leads from the fan motor and the chassis support 5
43. e humidity sensor 4 Power Transformer Start Lead terminal must be connected to hot wire RED Figure O 2 Oven Schematic Cooking Condition 12 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by pulling the door handle refer to the Figure D 1 Door Sensing Switch Monitor Switch Primary Interlock Switch Figure D 1 Door Open Mechanism DOOR SENSING SWITCH PRIMARY INTERLOCK SWITCH The primary interlock switch is mounted in the lower position of the latch hook the door sensing switch in the primary interlock system is mounted in the upper position of the latch hook is mounted on upper position of the latch hook They are activated by the latch heads on the door When the door is opened the switches interrupt the circuit to all components A cook cycle cannot take place until the door is firmly closed thereby activating both interlock switches The primary interlock system consists of the door sensing switch and secondary interlock relay located on the control circuit board MONITOR SWITCH The monitor switch is activated the contacts opened by the latch head on the door while the door is closed The switch is intended to render the oven inoperative by means of blowing the monitor fuse when the contacts of the second ary interlock relay RY2 and primary interlock switch fail to open when
44. en 3 Discharge high voltage capacitor 4 Disconnect the wire leads from the fan motor and the chassis support and release them from the holes of hood duct 5 Remove the one 1 screw holding the hood duct to the oven cavity front flange and lift up the fan motor side of the hood duct 6 Disconnect the high voltage wire leads with high voltage rectifier from the magnetron 7 Disconnect filament lead of the transformer from high voltage capacitor 8 Disconnect high voltage wire from capacitor 9 Remove one 1 screw holding capacitor holder and high voltage rectifier to the hood intake duct 10 Disconnect the high voltage rectifier assembly from the high voltage capacitor 11 Now the high voltage rectifier assembly is free 12 Remove capacitor from the holder 13 Now the high voltage capacitor is free CAUTION WHEN REPLACING THE HIGH VOLTAGE RECTIFIER ASSEMBLY THE GROUND SIDE TERMINAL MUST BE SECURED FIRMLY WITH A GROUNDING SCREW HOOD FAN THERMAL CUT OUT REMOVAL 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal 2 Open the door and block it open 3 Discharge high voltage capacitor 36 4 Disconnect the wire leads from the hood fan thermal cut out 5 Remove one 1 screw holding the thermal cut out to the right base plate 6 Remove the hood fan thermal cut out from the right base plat
45. en remove outer case Open the door and block it open Discharge high voltage capacitor Reconnect all leads removed from components during testing Re install the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions O1 GQ N L KEY UNIT TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 If the display fails to clear when the STOP CLEAR pad is depressed first verify the flat ribbon cable is making good contact verify that the door sensing switch stop switch operates properly that is the contacts are closed when the door is closed and open when the door is open If the door sensing switch stop switch is good disconnect the flat ribbon cable that connects the key unit to the control unit and make sure the door sensing switch is closed either close the door or short the door sensing switch connecter Use the Key unit matrix indicated on the control panel schematic and place a jumper wire between the pins that correspond to the STOP CLEAR pad making momentary contact If the control unit responds by clearing with a beep the key unit is faulty and must be replaced If the control unit does not respond it is faulty and must be replaced If a specific pad does not respond the above method may be used after clearing the control unit to determine if the cont
46. en should not exceed 1mW cm at any point 5cm or more from the external surface of the oven measured prior to acquisition by a purchaser and thereafter through the useful life of the oven 5 mW cm at any point 5cm or more from the external surface of the oven Safety interlock switches Primary interlock relay switch shall prevent microwave radiation emission in excess of the requirement as above mentioned Secondary interlock relay and door sensing switch shall prevent microwave radiation emission in excess of 5 mW cm2 at any point 5cm or more from the external surface of the oven B Preparation for testing Before beginning the actual measurement of leakage proceed as follows 1 Make sure that the actual instrument is operating normally as specified in its instruction booklet Important Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for microwave ovens 21 CFR 1030 10 c 3 i must be used for testing 2 3 wa SHE C Place the oven tray in the oven cavity Place the load of 27515 ml 9 8 oz of tap water initially at 20 5 C 68 F in the center of the oven cavity The water container shall be a low form of 600 ml 20 oz beaker with an inside diameter of approx 8 5 cm 3 1 2 in and made of an electrically nonconductive material such as glass or plastic The placing of this standard load in the oven is important not only to protect the oven
47. er supply voltage is applied to the heating element 4 Now the oven is in the microwave cooking mode COMPU DEFROST COOKING The COMPU DEFROST key is a special function key to defrost meats and poultry faster and better COMPU DE FROST automatically defrosts roast beef etc Touch the COMPU COOK pad and number pad to select menu and enter the food weight by touching the number pads When the START pad is touched the oven will cook according to the special cooking sequence VENTILATION METHODS HOT AIR EXHAUST 1 VERTICAL VENTING Forthis venting method hotair rising from the conventional range below is drawn in by the hood fan motor through the grease filters at the right and left sides of the base cover up through the right and left sides of the oven cavity then discharged vertically at rear center top of the oven into the customer s vent system AIR FLOW TO DUCT HOOD FAN MOTOR 4 r 2 p US HOOD DUCT 4 4 7 Ya 4 GREASE 4 FILTER 2 HORIZONTAL VENTING The air handing is the same as VERTICAL VENTING except that the final air discharge is directed horizontally out from the top rear of the oven into the customer s vent AIR FLOW HOOD FAN MOTOR 4 bocce Fo AE 7 t GREASE FILTER 3 RE CIRCULATION INSIDE VENTING The air handing is the same as VERTICAL VENTING except that the
48. ey are damaged loosened or removed ELECTROLUX HOME PRODUCTS INC PRODUCT DESCRIPTION GENERAL INFORMATION OPERATION TROUBLESHOOTING GUIDE AND TEST PROCEDURE TOUCH CONTROL PANEL COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDUR WIRING DIAGRAM PARTS LIST PRODUCT SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts 14 2 Amperes 60 Hertz Single phase 3 wire grounded Power Output 1000 watts IEC 705 TEST PROCEDURE Operating frequency of 2450MHz Case Dimensions Width 29 15 16 Height 16 3 8 Depth 14 15 32 Not including the door handle Cooking Cavity Dimensions Width 21 Height 8 7 8 1 6 Cubic Feet Depth 14 7 16 Hood lamp 2 bulbs 20W x 2 Incandescent light bulbs Hood fan Approx 300 C F M Control Complement Touch Control System Clock 1 00 12 59 Timer 0 99 min 99 seconds Microwave Power for Variable Cooking Repetition Rate Full power throughout the cooking time 90 of Full Power 80 of Full Power 70 of Full Power 60 of Full Power 50 of Full Power 40 of Full Power 30 of Full Power 2096 of Full Power 1096 of Full Power No power throughout the cooking time SENSOR COOKING pads DEFROST pads ONE TOUCH COOKING pads Memory Cook pad Number selection pads Power Level pad Timer Pause pad Clock pad Auto Fan Plus 1 Miute pad Turntable On Off pad START pad Work Light pad Night Light pad FAN HI LO pad Clear Off pad Oven Cav
49. h plunger of select switch for more than 3 seconds This condition is same as judgement by AH sensor 9 4 After approximately 3 seconds the display shows X X X X which is the remaining cooking time and the display count down If the above is not the case the control unit is probably defective If the above is proper the AH sensor is probably defective Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Disconnect the dummy resistor circuit from the sensor connector of control panel Carry out necessary repair Reconnect all leads removed from components during testing and repairing Re install the outer case cabinet Reconnect the power supply cord after the outer case installed Run the oven and check all function Carry out Water load cooking test again and ensure that the oven works properly Pl R1 R2 220 1 1 2 R3 4 3kQ 5 1 4W NC R4 1MQ 5 1 4W NO T tor F on Control Unit c 1 P NO E2 c L 1 R1 F 3 AM iil ji NC CONNECTOR R22 R3 R4 Sensor Dummy Resistor Circuit 26 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C TEST PROCEDURES COMPONENT TEST P NOISE FILTER TEST Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Disc
50. heat conductivity leading to a potential difference between them causing an output voltage from the bridge circuit the intensity of which is increased as the absolute humidity of the air increases Since the output is very minute it is amplified by the operational amplifier Absolute humidity vs Operational output voltage characteristic R1 amplifier Output voltage Output voltage Thermistor open vessel C Thermistor closed vessel Absolute humidity g m2 3 Detector Circuit of Absolute Humidity Sensor Circuit This detector circuit is used to detectthe output voltage of the absolute humidity circuit to allow the LSI to control sensor cooking of the unit When the unit is set in the sensor cooking mode 16 seconds clearing cycle occurs than the detector circuit starts to function and the LSI observes the initial voltage available at its AN1 terminal With this voltage given the switches SW1 to SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with R98 R102 of IC2 Changing the resistance values results in that there is the same potential at both F 3 terminal ofthe absolute humidity sensor and ANO terminal of the LSI The voltage of AN1 terminal will indicate about 2 5V This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode As the sensor cooking proceeds the food is heated to generate moisture by which the resistance 3
51. his test should only be used if above tests do not indicate a faulty magnetron and there is no defect in the following components or wiring silicon rectifier high voltage capacitor and power transformer This test will require a 16 ounce 453cc measuring cup and an accurate mercury thermometer or thermocouple type temperature tester For accurate results the following procedure must be followed carefully 1 Fill the measuring cup with 16 oz 453cc of tap water and measure the temperature of the water with a thermometer or thermocouple temperature tester Stir the thermometer or thermocouple through the water until the temperature stabilizes Record the temperature of the water 2 Place the cup of water in the oven Operate oven at POWER 10 HIGH selecting more than 60 seconds cook time Allow the water to heat for 60 seconds measuring with a stop watch second hand of a watch or the digital read out countdown 3 Remove the cup from the oven and again measure the temperature making sure to stir the thermometer or thermocouple through the water until the maximum temperature is recorded 4 Subtract cold water temperature from the hot water temperature The normal result should be 29 2 to 54 2 F 16 2 to 30 19C rise in temperature If the water temperatures are accurately measured and tested for the required time period the test results will indicate if the magnetron tube has low power output low rise in water temperature which would ex
52. ill appear COOKING CONDITION Program desired cooking time touching the NUMBER pads When the START pad is touched the following operations occur 1 The contacts of relays are closed and components connected to the relays are turned on as follows For details refer to Figure O 2 RELAY CONNECTED COMPONENTS RY1 Oven lamp Fan motor Stirrer motor RY2 Power transformer RY3 Turntable motor RY4 H fan motor 2 120 volts A C is supplied to the primary winding of the power transformer and is converted to about 3 3 volts A C output on the filament winding and approximately 2000 volts A C on the high voltage winding 3 The filament winding voltage heats the magnetron filament and the H V winding voltage is sent to a voltage doubler circuit 4 The microwave energy produced by the magnetron is channelled through the waveguide into the cavity feed box and then into the cavity where the food is placed to be cooked 5 Upon completion of the cooking time the power transformer oven lamp etc are turned off and the generation of microwave energy is stopped The oven will revert to the OFF condition 6 When the door is opened during a cook cycle monitor switch door sensing switch primary interlock switch and secondary interlock relay are activated with the following results The circuits to the stirrer motor the cooling fan motor the turntable motor and the high voltage components are de energized and
53. irmly Check all of the switches operation If any switch has not activated with the door closed loosen screw and adjust the latch hook position 6 After adjustment check the following 1 In and out play of door remains less than 0 5mm when inthe latched position First check upper position of latch hook pushing and pulling upper portion of door toward the oven face Then check lower portion of the latch hook pushing and pulling lower portion of the door toward the oven face Both results play in the door should be less than 0 5mm The door sensing switch and primary interlock switch interrupt the circuit before the door can be opened 3 Monitor switch contacts close when door is opened 4 The contact of door sensing switch and primary interlock switch open within 1 2mm gap between right side of cavity face plate and door when door is open Re install outer case and check for microwave leakage around door with an approved microwave survey meter Refer to Microwave Measurement Procedure 2 Sensing Switch Monitor Switch Prima Interlock Switch Figure C 1 Latch Switch Adjustments DOOR REPLACEMENT DOOR ASSEMBLY REMOVAL 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open Discharge high voltage capacitor Rem
54. ity Light 20W x 1 Incandescent light bulb Safety Standard UL Listed FCC Authorized DHHS Rules CFR Title 21 Chapter 1 Subchapter J Weight Approx 56 Ibs GENERAL INFORMATION GROUNDING INSTRUCTIONS This oven is equipped with a three prong grounding plug It must be plugged into a wall receptacle that is properly installed and grounded in accordance with the National Electrical Code and local codes and ordinances In the event of an electrical short circuit grounding reduces the risk of electric shock by providing an escape wire for the electric current WARNING Improper use of the grounding plug can result in a risk of electric shock Electrical Requirements The oven is equipped with a 3 prong grounding plug DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE GROUNDING PIN FROM THE PLUG The power supply cord and plug must be connected to a separate 120 Volt AC 60 Hz 15 Amp or more dedicated line using a grounded receptacle The receptacle should be located inside the cabinet directly above the Microwave Oven Hood system mounting location 3 Pronged Plug Grounded Receptacle Box Grounding Pin 3 Pronged Receptacle OVEN DIAGRAM Oven door with see through window Door hinges Stirrer cover Turntable motor shaft Oven lamp It will light when oven is operating or door is open 6 Door latches BON
55. l while not cooking In other cooking modes variable cooking the signal turns to H level and L level in repetition according to the power level Signal coming from touch key When either G12 line on key matrix is touched a corresponding signal out of P20 P21 P22 P25 and P26 will be input into P46 When no key is touched the signal is held at H level Signal similar to P46 When either G11 line on key matrix is touched a corresponding signal will be input into P45 Signal similar to P46 When either G10 line on key matrix is touched a corresponding signal will be input into P44 Signal similar to P46 When either G9 line on key matrix is touched a corresponding signal will be input into P43 Signal synchronized with commercial power source frequency This is the basic timing for time processing of LSI 16 7 msec Terminal not used Connected to GND through the pull down resistor R100 Auto clear terminal Internal clock oscillation frequency input setting The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XOUT terminal Internal clock oscillation frequency control output Output to control oscillation input of XIN Power source voltage 5 0V GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C CIEN Key strobe signal Signal applied to touch key section A pulse sign
56. l with Operation and Service Information for the ELECTROLUX OVER THE RANGE MICROWAVE OVENS GLM V169GSB GLMV169GBB GLMV169GQB PLMVZ169GCC It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service Check the interlock switches and the door seal carefully Special attention should be given to avoid electrical shock and microwave radiation hazard WARNING Never operate the oven until the following points are ensured A The door is tightly closed B The door brackets and hinges are not defective C The door packing is not damaged D The door is not deformed or warped E There is not any other visible damage with the oven Servicing and repair work must be carried out only by trained service personnel DANGER Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing Service personnel Do not contact the following parts while the ap pliance is energized High Voltage Capacitor PowerTransformer Magnetron High Voltage Rectifier Assembly High Voltage Harness If provided Vent Hood Fan assembly Cooling Fan Motor All the parts marked on parts list are used at voltages more than 250V Removal of the outer wrap gives access to voltage above 250V All the parts marked A on parts list may cause undue microwave exposure by themselves or when th
57. n cavity Remove the base cover from the oven cavity by pulling 7 Now the turntable motor is free STIRRER MOTOR REMOVAL Disconnect the power supply cord and remove the oven REMOVAL from wall and remove outer case Refer to procedure 5 Disconnect the wire leads from the stirrer motor of Removal of Oven from Wall and Outer case 6 Remove the two 2 screws holding the stirrer motor to Removal the waveguide of the oven cavity Open the door and block it open 7 Remove the stirrer motor from the waveguide Discharge high voltage capacitor 8 Now the stirrer motor is free Remove the hood fan motor and the hood duct fromthe 9 When installing the stirrer motor the shaft of stirrer oven cavity referring to the procedure of HOOD FAN motor must be inserted to the stirrer fan shaft Refer to MOTOR HOOD DUCT AND OVEN LAMP SOCKET the procedure of STIRRER COVER AND STIRRER FAN INSTALLATION STIRRER COVER AND STIRRER FAN INSTALLATION Putthe stirrer fan on the stirrer cover to match the stirrer fan shaft to the center of the stirrer support CAS Shaft Insert the shaft of stirrer fan to the shaft of stirrer lt 277 Slirrer Fan motor Stirrer Cover Insert the cutout of stirrer cover to the tabs on the ceiling Install the stirrer cover to the oven cavity and secure it Canoe Clip Disconnect the power supply cord Remove three 3 screws holding the hood exhaust louver Remove the hood e
58. n may be reproduced stored in retrieval systems or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher
59. n remove outer case 2 Open the door and block it open 3 4 If the motor does not turn touch the FAN HI LO pad once set hood fan motor power HIGH and Discharge high voltage capacitor check voltage between pins 1 and 2 Blue and Black wires of the 6 pin connector If 120 Volts appear and the hood capacitor is good replace the hood fan assembly If 120 Volts does not appear check the motor circuit The resistance values of motor terminals are as follows Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions Resistance between YLW BLU 770 21 BLU 1 AND YLW 4 00 Shorted HOOD FAN BLK 2 AND YLW 4 320 CAPACITOR BLU 1 AND BLK 2 320 3 32 1 BLK 2 AND WHT 3 200 WHT 3 AND RED 5 450 O 24 2 I RED u K dh 5 6 CONNECTOR OF HOOD FAN MOTOR WHT OOO lt 2 m 20 PROCEDURE LETTER K TEST PROCEDURES COMPONENT TEST TOUCH CONTROL PANEL ASSEMBLY TEST The touch control panel consists of circuits including semiconductors such as LSI ICs etc Therefore unlike conventional microwave ovens proper maintenance cannot be performed with only a voltmeter and ohmmeter In this service manual
60. nerating 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 genera tion and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner e A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner RD2110U BEFORE SERVICING Before servicing an operative unit perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual If microwave emissions level is in excess of the specified limit contact ELECTROLUX HOME PRODUCTS INC immediately If the unit operates with the door open service person should 1 tell the user not to operate the oven and 2 contact ELECTROLUX HOME PRODUCTS INC and Food and Drug Administration s Center for Devices and Radiological Health immediately Service personnel should inform ELECTROLUX HOME PRODUCTS INC of any certified unit found with emissions in excess of 4mW cm The owner of the unit should be instructed not to use the unit until the oven has been brought into compliance RD8100U WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro ducing very high voltage and
61. ng guide given below if indicator does not light up after above check and repairs are finished 1 6 7 Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Disconnect the leads to the primary of the power transformer Ensure that these leads remain isolated from other components and oven chassis by using insulation tape After that procedure re connect the power supply cord Follow the troubleshooting guide given below for repair STEPS OCCURRENCE CAUSE OR CORRECTION The rated AC voltage is not present between 1 Pin No 7 of the 4 pin connector A and the Check supply voltage and oven power cord common terminal of the relay RY1 2 The rated AC voltage is present at primary Low voltage transformer or secondary circuit defective side of low voltage transformer Check and repair 8 10 11 12 13 14 Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Reconnect all leads removed from components during testing Re install the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions 24 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C TEST PROCEDURES dica COMPONENT TEST P AH SENSOR TEST Checking the initial sensor cooking condition
62. on temperature fuse reaches approximately 302 F 150 C An open magnetron temperature fuse indicates overheating of the magnetron Check for restricted air flow to the magnetron especially the cooling fan air guide ONDA 17 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C PROCEDURE LETTER TEST PROCEDURES COMPONENT TEST Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions CAUTION IFTHETEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOMTEMPERATURE REPLACE TEMPERATURE FUSE PRIMARY INTERLOCK SWITCH TEST N Y O Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Isolate the switch and connect the ohmmeter to the common COM and normally open NO terminal of the switch The meter should indicate an open circuit with the door open and a closed circuit with the door closed If improper operation is indicated replace the secondary interlock switch Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH Q N Y O
63. onal electric or gas range over which it is installed This air is then expelled either vertically or horizontally through the customer supplied duct system or discharged back into the kitchen GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C STIRRER MOTOR The stirrer motor drives the stirrer fan to stir the microwave radiation from the waveguide HOOD LAMP The hood lamps are mounted at the hood lamp angle on the base cover The hood lamps can be turned off and on by touching the WORK LIGHT padorthe NIGHT LIGHT pad And also the brightness can be varied to high or low by touching the WORK LIGHT pad or the NIGHT LIGHT pad TROUBLESHOOTING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is con nected When troubleshooting the microwave oven it is helpful to follow the Sequence of Operation in performing the checks Many of the possible causes of trouble will require that a specific test be performed These tests are given a procedure letter which will be found in the Test Procedure section IMPORTANT If the oven becomes inoperative because of a blown monitor fuse check the monitor switch relay RY1 secondary interlock relay RY2 door sensing switch and primary interlock switch before replacing the moni tor fuse If the monitor fuse is replaced the monitor switch must also be replaced Use part FFS BA016 KIT as an assembly IMPORTANT Whenever troubleshooting is perfo
64. onnect the leads to the primary of the power transformer Using an ohm meter check between the terminals as described in the following table H MONITOR N NOISE FILTER UNIT RESISTOR FUSE i e e LINE CROSS CAPACITOR e P E NOISE SUPPRESSION COIL LINE BYPASS CAPACITOR LINE BYPASS CAPACITOR e 0 0033uF 250v 0 0033uF 250v ji UV LOAD LOAD MEASURING POINT INDICATION OF OHM METER Between N and load Open Circuit Between terminal N and load Short Circuit Between terminal H and load Short Circuit If incorrect readings are obtained replace the noise filter Reconnect all leads removed from components during testing Re install the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions OND 27 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as shown in the touch control panel circuit 1 Key Unit 2 Control Unit The Control unit consists of LSI Unit and Power U nit The principal functions of these units and the signals com municated among them are explained below Key Unit The key unit is composed of a matrix signals generated in the LSI are sent to the key unit through P20 P21 P22 P25 and P
65. ove the hood exhaust louver from the oven cavity by pushing the right and left tabs of the hood exhaust louver Refer to the procedure of HOOD EXHAUST LOUVER REMOVAL Insert a putty knife thickness of about 0 5mm into the gap A between the door stopper and the choke cover as shown in Figure C 3 to free engaging parts 6 Lift up the door stopper 7 Now the door stopper is free from the door assembly 8 Lift up the door assembly to release the upper and lower door hinge pins from the upper and lower oven hinges 9 Now the door assembly is free Note When the individual parts are replaced refer to Door Disassembly DOOR ASSEMBLY RE INSTALL 1 Onre installing door insertthe lower oven hinge to lower door hinge pin 2 Insert the upper oven hinge to the upper door hinge pin 40 3 Shut the door close the contacts of interlock switches Make sure upper and lower oven hinges are inserted into the upper an lower door hinge pins Make sure the door is parallel with oven face lines left and upper side lines and door latch heads pass through latch holes correctly Re install the door stopper to the door assembly Re install the hood exhaust louver to the oven cavity front face plate Note After any service to the door A Make sure that door sensing switch and secondary interlock switch are operating properly Refer to chapter Test Procedures B An approved microwave survey meter should
66. owing procedure GLM GLM GLM V169GSB V169GBB V169GQB PLMVZ169GCB C 2 3 4 5 CA Hold the center of the bracket which supports the shaft Make sure that the axis of the shaft is not slanted of the fan motor on the flat table 6 Install the hood duct to the oven cavity with the one 1 Apply the screw lock tight into the hole for shaft of the screw fan blade 7 Re install the wire leads to the hole of the hood duct Install the fan blade to the shaft of fan motor by pushing 8 Connect the wire leads to the fan motor and chassis the fan blade with a small light weight ball peen hammer support referring to the pictorial diagram or rubber mallet 9 Refer to procedure of OUTER CASE REMOVAL And Install the fan motor to the hood duct with the two 2 reverse their procedure And re install the outer case screws l Shaft UTION Do not hit the fan blade strongly when installing because the bracket may be disfigured 7 Make sure that the fan blade rotates smooth after installation Table m 2 TURNTABLE MOTOR REMOVAL 7 7777 Disconnect the power supply cord down and moving to the left slightly Open the door and block it open 5 Disconnect the wire leads from the turntable motor Remove the three 3 screws holding the base coverto 6 Remove one 1 screw holding turntable motor to the the cavity ove
67. proper operation is indicated the control unit is probably defective and should be checked FOIL PATTERN ON THE PRINTED WIRING BOARD TEST To protect the electronic circuits this model is provided with a fine foil pattern added to the primary on the PWB this foil pattern acts as a fuse 1 Foil pattern check and repairs 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Follow the troubleshooting guide given below for repair 23 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C 6 7 8 9 Fol TEST PROCEDURES PROCEDURE COMPONENT TEST STEPS OCCURRENCE CAUSE OR CORRECTION 1 Only pattern at a is broken Insert jumper wire J1 and solder 2 Pattern at a and b are broken Insert the coil RCILF2003YAZZ between c and d 5 Make a visual inspection of the varistor Check for burned damage and examine the transformer with a tester for the 21 presence of layer short circuit check c e b the primary coil resistance which 15 approximately 780y 10 If any 2 d abnormal condition is detected replace ki the defective parts f 3 gt 2 Ww Reconnect all leads removed from components during testing Re install the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions low the troubleshooti
68. rmed with the power supply cord disconnected It may in some cases be necessary to connect the power supply cord after the outer case has been removed in this event Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Disconnect the leads to the primary of the power transformer Ensure that the leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect the power supply cord OQ m When the testing is completed Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Reconnect the leads to the primary of the power transformer Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions O GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C Replace Check RE e e Bunue1s Jaye spuooes zg ye sdois T 10sues Aq si Jayem JO dno yo jou SBOP uonipuoo Bunooy Josuas pue seop Jo pue sdojs ay e e e peisoJjep
69. rol unit or key pad is at fault 5 Reconnect all leads removed from components during testing 6 Re install the outer case cabinet G5 H 1 G6 157 G8 G9 H G 10 G11 672 7 Reconnect the power supply cord after the outer case is installed 0 9 8 7 Beverage Baked Sensor 6 8 Run the oven and check all um functions H Hi Lo Fan Help Poultry Fish Cook Rice Clock Night Dinner Lunch Breakfast Auto Work Turntable Timer Light Items Items Items Defrost Light On Off Pause om START uem Vege dee TMm 5 4 3 2 Defrost 1 Veggie Popcorn 22 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C TEST PROCEDURES COMPONENT TEST M RELAY TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure re connect the power supply cord 7 Remove the outer case and check voltage between Pin No 7 of the 4 pin connector A and the common terminal of the relay RY1 on the control unit with an A C voltmeter The meter should indicate 120 volts if not check oven circuit R
70. ssibly fatal electric shock Example High Voltage Capacitor Power Transformer Magnetron High Voltage Rectifier Assembly High Voltage Harness etc ing the oven E Avoid possible exposure to microwave energy Please follow the instructions below before operat 1 Disconnect the power supply cord 2 Visually checkthe door and cavity face plate for damage dents cracks signs of arcing etc Carry out any remedial work that is necessary before operating the oven Do not operate the oven if any of the following conditions exist 1 Door does not close firmly 2 Door hinge support or latch hook is damaged 3 The door gasket or seal is damaged 4 The door is bent or warped To prevent an electric shock take the following pre cautions 1 Before wiring 1 Disconnect the power supply cord 2 Open the door block it open 3 Discharge the high voltage capacitor and wait for 60 seconds 2 Don t let the wire leads touch to the followiong parts 1 High voltage parts Magnetron High voltage transformer High voltage capacitor and High voltage rectifier assembly 2 Hot parts Oven lamp Magnetron High voltage transformer and Oven cavity 5 There are defective parts in the door interlock system 6 There are defective parts in the microwave generating and transmission assembly 7 There is visible damage to the oven Do not operate the oven 1 Without the RF gasket Magnetron 2 If
71. tend cooking time or high power output high rise in water temperature which would reduce cooking time Because cooking time can be adjusted to compensate for power output the magnetron tube assembly should be replaced only if the water temperature rise test indicates a power output well beyond the normal limits The test is only accurate if the power supply line voltage is 120 volts and the oven cavity is clean ON O gt POWER TRANSFORMER TEST Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Disconnect the primary input terminals and measure the resistance of the transformer with an ohmmeter Check for continuity of the coils with an ohmmeter On the R x 1 scale the resistance of the primary coil should be less than 1 ohm and the resistance of the high voltage coil should be approximately 83 2 ohms the resistance of the filament coil should be less than 1 ohm Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions N Y O 16 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C TEST PROCEDURES BROCEDURE COMPONENT TEST LETTER HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL SO DO NOT ATTEMPT TO MEASURE THE FILAMENT AND HIGH VOLTAGE C HIGH VOLTAGE REC
72. the door is opened Functions 1 When the door is opened the monitor switch contact close to the ON condition due to their being normally closed At this time the secondary interlock relay RY2 primary interlock switch are in the OFF condition contacts open due to their being normally open contact switches And the contacts of relay RY1 are in the ON condition contacts close 2 Asthe door goes to a closed position the monitor switch contacts are first opened and then the door sensing switch and the primary interlock switch contacts close On opening the door each of these switches operate inversely 3 If the door is opened and the secondary interlock relay RY2 and primary interlock switch contacts fail to open the monitor fuse blows simultaneously with closing of the monitor switch contacts CAUTION BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH SECONDARY INTERLOCK RELAY RY2 RE LAY RY1 PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION REFER TO CHAPTER TEST PROCEDURE NOTE MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY THERMAL CUT OUT HOOD This thermal cut out located on the right base plate It is designed to automatically turn on the hood fan motor whenever the hot air rising from the conventional range below causes the temperature at the thermal cut out to rise to 140 F 60 C or higher thus removing this hot air from around microwave o
73. the right and left tabs of the hood exhaust louver Refer to procedure of HOOD EXHAUST LOUVER REMOVAL Remove four 4 screws holding the rear stay to the hood fan motor or the oven and remove it Remove the four 4 screws from the rear of the outer case cabinet Slide the outer case cabinet back about 1 inch 3 cm 7 8 CAUTION 1 to free it from retaining clips on the cavity face plate Disconnect the three 3 pin connector of the power supply cord from the wiring harness and remove the power supply cord together with the outer case Discharge high voltage capacitor DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE 2 DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING POWER TRANSFORMER REMOVAL Disconnect the power supply cord remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer Case Removal And proceed as follows Open the door and block it open Discharge high voltage capacitor Remove one 1 screw holding the hood duct to the oven cavity front flange Disconnect the stop switch harness from the chassis support and disconnect the wire leads from the fan motor Lift up the fan motor side of the hood duct Disconnect filament leads of transformer from the magnetron and capacitor Disconnect high voltage leads of capacitor from the transformer Disconnect
74. tor is free GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C 7 Disconnect the connector CN F from the control unit 8 Remove one 1 screw holding the hood duct to the oven cavity front plate 9 Release the 6 pin connector and the 3 pin connector of the main harness A from the hood duct 10 Disconnectthe wire leads from the fan motor and chassis support and release the wire leads from holes of the hood duct 11 Remove the two 2 unit mounting screws from the chassis support right side and the hood duct left side 12 Remove the one 1 screw holding the chassis support 13 Remove the chassis support 14 Remove the hood duct from the oven cavity by lifting it up 15 Screw the oven lamp off from the lamp socket MAGNETRON REMOVAL 1 Disconnect the power supply cord remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open Discharge high voltage capacitor Disconnect the wire leads from the fan motor and the chassis support and release them from the holes of hood duct 5 Remove the one 1 screw holding the hood duct to the oven cavity front plate and lift up the fan motor side of the hood duct 6 Remove the one 1 screw holding the capacitor holder to the hood intake duct 7 Disconnect the high voltage wire leads of the high voltage rectifier assembly from the magnetron 8 Disconnect the filament
75. uit This circuit consists of 22 segments and 3 common electrodes using a Light Crystal Display 9 Back Light Circuit A circuit to drive the back light Light emitting diodes LD1 LD4 DESCRIPTION OF LSI LSI The I O SS of the LSI is detailed in the following table VL1 Power source voltage input terminal Standard voltage for LCD AN7 AN4 Terminal to change cooking input according to the Model By using the A D converter contained in the LSI DC voltage in accordance with the Model in operation is applied to set up its cooking constant GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C Pin No Sia Vo Besep on Back li ircuit Light emitting diodes driving signal To input signal which communicates the door open close information to LSI Door close H level signal OV Door open L level signal 5V Terminal not used erminai NOt u Signal to sound buzzer 2 0 kHz A key touch sound B Completion sound Terminal not used Oven lamp fan motor and turntable motor driving signal Toturn onandoffshut off relay RY1 Thesquare waveform voltage is delivered to the RY1 driving circuit and RY2 control circuit During cooking P51 P50 Terminal not used P47 Magnetron high voltage circuit driving signal To turn on and off the cook relay RY2 The output signals holds L level during microwave cooking and H leve
76. uld indicate an open circuit If improper operation is indicated the switch may be defective After testing the monitor switch reconnect the wire lead to the monitor switch COM terminal and check the continuity of the monitor circuit Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions Y O Y O Screw Driver Dal Monitor Interlock Sa e Switch Switch GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C PROCEDURE LETTER TEST PROCEDURES COMPONENT TEST HOOD THERMAL CUT OUT TEST N Y O Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Acontinuity check across the thermal cut out terminals should indicate an open circuit unless the temperature of the thermal cut out reaches approximately 140 F 60 C or more At that temperature the contacts will close The thermal cut out opens automatically at approximately 113 F 45 C Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions HOOD FAN MOTOR TEST Y O 1 Disconnect the power supply cord and the
77. un the oven and check all functions GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C TEST PROCEDURES in COMPONENT TEST H MONITOR SWITCH TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Before performing this test make sure that the secondary interlock switch and the primary interlock relay are operating properly according to the above Switch Test Procedure Disconnect the wire lead from the monitor switch COM terminal Check the monitor switch operation by using the ohmmeter as follows When the door is open the meter should indicate a closed circuit When the monitor switch actuator is pushed by a screw driver through the lower latch hole on the front plate of the oven cavity with the door opened in this condition the plunger of the monitor switch is pushed in the meter should indicate an open circuit If improper operation is indicated the switch may be defective After testing the monitor switch reconnect the wire lead to the monitor switch COM terminal and check the continuity of the monitor circuit Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions of the oven cavity with the door opened in this condition the plunger of the monitor switch is pushed in the meter sho
78. ve 1 Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor Replace the key unit 2 3 4 5 6 7 Reconnect all leads removed from components during testing Re install the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions 21 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C TEST PROCEDURES dr COMPONENT TEST 2 Control Unit The following symptoms indicate a defective control unit Before replacing the control unit perform the Key unit test Procedure M to determine if control unit is faulty 2 1 In connection with pads a When touching the pads a certain group of pads do not produce a signal b When touching the pads no pads produce a signal 2 2 n connection with indicators a At a certain digit all or some segments do not light up b Ata certain digit brightness is low c Only one indicator does not light d The corresponding segments of all digits do not light up or they continue to light up e Wrong figure appears f A certain group of indicators do not light up g The figure of all digits flicker 2 3 Other possible problems caused by defective control unit a Buzzer does not sound or continues to sound b Clock does not operate properly c Cooking is not possible When testing is completed 1 Disconnect the power supply cord and th
79. ve two 2 screws holding the power unit to the key fixing plate 15 Release the two 2 tabs holding the power unit to the 7 8 key fixing plate 16 Release the one 1 tab holding the LCD to the LCD holder 17 Release the four 4 tabs holding the LSI unit to the LCD holder 18 Remove the LCD holder and the LED sheet 19 Now the control unit is free 20 Remove the one 1 screw holding the key fixing plate to the control panel 21 Release the six 6 tabs holding the key fixing plate to the control panel 22 Remove the key fixing plate from the control panel 23 Tear the key unit from the key fixing plate 24 Now the key unit is free NOTES FOR KEY UNIT REPLACEMENT 1 Do not reuse the torn key unit because the performance of the adhesive becomes weak Before attaching a new key unit wipe off remaining adhesive on the key fixing plate surfaces completely with a soft cloth soaked in alcohol When attaching the key unit to the key fixing plate adjust the upper edge and right edge of the key unit to the correct position of key fixing plate Stick the key unit firmly to the key fixing plate by rubbing with soft cloth not to scratch 2 POSITIVE LOCK CONNECTOR NO CASE TYPE REMOVAL 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal 2 Open the door and block it open 3 Discharge
80. ven When the temperature around the thermal cut out drops to 113 F 45 C or lower the thermal cut out shuts off the hood fan motor THERMAL CUT OUT CAVITY This thermal cut out is located on the top of the oven cavity It is designed to prevent damage to the oven unit if the food in the oven catches fire due to overheating produced by improper setting of cooking time or failure of control unit Under normal operation the thermal cut out remains closed However the thermal cut out will open at 293 F 145 C causing the oven to shut down TURNTABLE MOTOR The turntable motor rotates the turntable located on the bottom of the oven cavity so that the foods on the turnta ble cook evenly during cooking Turntable will turn in either direction The turntable motor can be turned off by touching TURNTABLE ON OFF pad COOLING FAN MOTOR The cooling fan motor drives a blade which draws external cool air This cool air is directed through the air vanes sur rounding the magnetron and cools the magnetron This air is channelled through the oven cavity to remove steam and vapors given off from the heating foods It is then exhausted through the exhausting air vents at the oven cavity HOOD FAN MOTOR The hood fan motor is a two speed single phase double pole induction type requiring a hood fan capacitor It is located outside the upper rear part of the oven cavity is to remove from around the oven hot air rising from the conventi
81. ven to the power supply cord and check the sensor cook operation proceed as follows 9 1 Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup 9 2 Place the container on the center of tray in the oven cavity 9 3 Close the door 9 4 Touch Sensor reheat pad once and touch the Start pad 9 5 The control panel is in automatic Sensor operation 9 6 The display will start to count down the remaining cooking time and the oven will turn off automatically after the water is boiling bubbling If new sensor dose not operate properly the problem is with the control unit and refer to explanation below 25 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C CHECKING CONTROL UNIT 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the sensor connector that is mounted to control panel 5 Then connect the dummy resistor circuit see fig to the sensor connector of control panel 6 Disconnect the leads to the primary of the power transformer 7 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 8 After that procedure re connect the supply 9 Check the sensor cook operation proceed as follows 9 1 Touch Sensor reheat pad once and touch the Start pad 9 2 The control panel is in the sensor cooking operation 9 3 After approximately 32 seconds pus
82. xhaust louver from the oven by by one canoe clip OVEN LAMP REMOVAL Lift the oven lamp cover up Now the oven lamp and the socket are found Screw the oven lamp off from the lamp socket Now the oven lamp is free to oven cavity front flange pushing the right and lefttabs ofthe hood exhaust louver Refer to procedure of HOOD EXHAUST LOUVER REMOVAL 38 GLMV169GSB GLMV169GBB GLMV169GQB PLMVZ169GCB C CONTROL PANEL ASSEMBLY CONTROL UNIT AND KEY UNIT REMOVAL 1 Disconnect the power supply cord Open the door and block it open Remove one 1 screw holding the hood exhaust louver to oven cavity front flange Remove the hood exhaust louver from the oven by pushing the right and left tabs of the hood exhaust louver Refer to procedure of HOOD EXHAUST LOUVER REMOVAL Remove one 1 screw holding the control panel to the oven cavity front face plate Release the control panel from the oven cavity front face plate by lifting it up Disconnect the wire leads from the relays RY1 and RY2 Disconnect the connectors CN A CN B and CN E from the control unit 9 Remove the control panel assembly from the oven 10 Now the control panel assembly is free 11 Disconnect the connector CN G from the control unit 12 Release the two 2 tabs of LCD holder from the two 2 holes of the key fixing plate 13 Release the four 4 tabs holding the LCD holder to the tcontrol panel 14 Remo

before servicing

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