SERVICE Manual
Contents
1. NOISE 0 PRIMARY V P C FILTER M GT S W S W PET J BRN BRN 7 eo oe 0 0 1 L amp i HVD X VOLTAGE 2 E 3 FREG 2 BU CAPACITOR B n J iy 2 LAST i E oe AC 230V 77 9 177 E ie 50HZ WHT LU 4 4 L8 i war 77 t RESISTOR 64 J a 4 BUS BU uS BLU ducis EE T C 0 TIMER SECONDARY INRUSH MAGNETRON CAVITY S W S W SIW 7777 NOTE H DOOR IS OPENDS No BI ORE n UE NO BRN WHT NO BRN NO BK ORG ORANGE BN L BLU O0RG L BRN WHT WHT WHITE PRIM ARY SECON DARY MONITOR BLK BLACK LATCH S W LATCH S W LATCH S W High Voltage Circuit M AGNETRON HIGH VOLTAGE DIODE TO CHASSIS ml F PL A HIGH VOLTAGE CAPACITOR RED RED A RED H V FUSE BRN SYMBOL COLOR BRN BROWN RED BLK BLACK BLU RED RED BLU BLUE ORG ORANGE HIGH VOLTAGE TRANSFORM ER Samsung Electronics2. Ref No Parts No Description Specification Q ty Remarks D 1 DE64 40104F DOOR A ABS 200G WHT M 736 746 XET 1 D2 DE67 20151E SCREEN DOOR PET T0 188 W 166 L305 NO BEDA 1 D 3 DE92 50126B ASSY DOOR E COATING BLK CE745G 1 D 4 DE64 40008B DOOR C PP T1 5 W LG BLK CE745G 1 D5 DE01 00003A FILM DOOR PE FILM T0 15 W 143 L265 M 745 1 D 6 DE64 40006A DOOR KEY POM TC3005 2 0 1268 CE945G 1 D7 DE61 70033A SPRING KEY ES HSWR10 P10 6 D6 0 L22 3 BLUIN 1 7 4 Assembly Control Box Parts List Ref No Parts No Description Specification Q ty Remarks C1 DE66 20010E BUTTON PUSH ABS HR 0370D WHT W 9501 17 6G 1 C2 DE61 70076A SPRING BUTTON HSWR P10 6 1 C 3 DE64 10146A KNOB ABS WHT 5G NEW NEW GUAD 2 C4 DE72 70163D CONTROL PANEL ABS HR 0370U W 9501 PURE W HT 1 C5 DE45 10074A ER ASSY TM FK60M TAL 220 240V 50HZ CM 0 1 C 6 3501 000309 RELA Y POW ER CHP11 A240S 250V15A 240V 3750VA 1 7 5 Assembly Body Latch Parts List Ref No Parts No Description Specification Q ty Remarks Bl DE66 40001A LATCH BODY POM F20 02 40GR NTR 1 B 2 3405 000178 SWITCH MICRO 250V 15A 200gf SPST NO 2 B 3 3405 000175 SWITCH MICRO 250V 15A 200gf SPST NO 1 B 4 DE66 90001A LEVER SWITCH P 0 M F20 02 2 6 NTR 2ND W 1 Samsung Electronics 7 3 Exploded Views and Parts List 7 6 Standard Parts List Parts No Description Specification Remarks Zz DE60 10012A DE60 10012A DE60 10012A DE60 10
3. 800w 60 INSTANT REHEAT OPEN DOOR PUSH BUTTON Samsung Electronics 3 1 Operating Instruction 3 2 Features amp External Views SAFETY INTERLOCK HOLES VARIABLE COOKING POWER CONTROL KNOB TIMER KNOB OPEN DOOR PUSH BUTTON GLASS PLATE ROLLER RING 275mm le 200mm 34 4mm 3 3 Checking That Your Oven is Operating Correctly NOTE The oven must be plugged into an appropriate wall socket The glass plate must be in position in the ovn 1 Open the oven door by pushing the OPEN DOOR button Place a glass of water on the glass plate Close the door 2 Set the power level to 100 maximum by turning COOKING POWER CONTROL knob 3 Set the time to 4 to 5 minutes by turing TIMER knob Important If any problem is experienced in the operation of the oven please refer to the section on page 4 what to do if you are in doubt or have a problem 3 2 Samsung Electronics Operating Instruction 3 4 Variable Power Cooking Chart Operation Set the COOKING POWER CONTROL knob to the appropriate power level by turning it OUTPUT POWER LEVEL M 736 HIGH 100 800W MEDIUM HIGH 10 560W M EDIUM 50 400W LOW 30 240W DEFROST 20 160W WARM 15 120W 3 5 Adjusting the Cooking Time During Cooking Stopping the Cooking To stop the cooking Press Temporarily Open Door To resume coo
4. 7 Remove screws from the back panel 8 Take out the fan motor 9 Remove the oven lamp by rotating to pull out from hole of air cover When removing the magnetron make sure that its antenna does not hit any adjacent parts or it may be damaged NOTE2 When replacing the magnetron be sure to remount the magnetron gasket in the correct position and make sure the gasket is in good condition 4 2 Replacement of High Voltage Transformer 1 Discharge the high voltage capacitor 2 Disconnect all the leads 3 Remove the mounting bolts 4 Reconnect the leads correctly and firmly PRECAUTION There exists HIGH VOLTAGE ELECTRICITY with high current Capabilities in the circuits of the HIGH VOLTAGE TRANSFORMER secondary and filament terminals It is extremely dangerous to work on or near these circuits with the oven energized DO NOT measure the voltage in the high voltage circuit including filament voltage of magnetron PRECAUTION Never touch any circuit wiring with your hand nor with an insulated tool during operation Samsung Electronics Lamp Thermo S W Supporter M GT H V Trans Nuts or Screw H V Capacitor H V Trans Screws 4 1 Disassembly amp Reassembly 4 3 Replacement of Door Assembly 4 3 1 Removal of Door Assembly Remove hex bolts securing the upper hinge and lower hinge Then remove the door assembly 4 3 2 Removal of Door C Insert f
5. including nonmetallic control knobs and compartment covers Make sure that there are no cabinet openings through which people particularly children might insert objects and contact dangerous voltages Examples Lamp hole ventilation slots Inform the manufacturer of any oven found to have emmission in excess of 5 mW cm2 Make repairs to bring the unit into compliance at no cost to owner and try to determine cause Instruct owner not to use oven until it has been brought into compliance CENTRAL SERVICE CENTER Service technicians should remove their watches while repairing an MWO Samsung Electronics 11 12 13 14 15 16 To avoid any possible radiation hazard replace parts in accordance with the wiring diagram Also use only the exact replacements for the following parts Primary and secondary interlock switches interlock monitor switch If the fuse is blown by the Interlock Monitor Switch Replace all of the following at the same time Primary and secondary switches as well as the Interlock Monitor Switch The correct adjustment of these switches is described elsewhere in this manual Make sure that the fuse has the correct rating for the particular model being repaired Design Alteration Warning Use exact replacement parts only i e only those that are specified in the drawings and parts lists of this manual This is especially important for the Interlock switches described above
6. keys move smoothly after adjustment is completed i Completely tighten the screws holding the Latch Body a Lever Door to the oven assembly Body Latch Secondary Switch 4 Reconnect to Monitor switch and check the continuity of the monitor circuit and all latch switches again by following the components test procedures Door Open Door Closed pU is m 3 Primary switch oo 0 Confirm that the gap between the switch housing an the switch actuator is no more than 0 5mm when door Monitor switch COM NC 0 i is closed Secondary S W oo 0 5 2 Samsung Electronics Alignment and Adjustments 5 6 Output Power of Magnetron CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT ALLOW EXPOSWRE TO MICROWAVE RADIATION FROM MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING M ICROW AVE ENERGY The output power of the magnetron can be measured by performing a water temperature rise test Equipment needed Two 1 liter cylindrical borosilicate glass vessel Outside diameter of 190mm One glass thermometer with mercury column NOTE Check line voltage under load Low voltage will lower the magnetron output Make all temperature and time tests with accurate equipment 1 Fill the one liter glass vessel with one liter of water 2 Stir water in glass vessel with thermometer and record glass vessel s temperature as T1 10 1 C 3 After moving the water into another glass vessel place it on the cent
7. umm MICROWAVE OVEN 736 SERVICE MICROWAVE OVEN CONTENTS 1 Precaution 2 Statements 3 Operating Instructions 4 Disassembly and Reassembly 5 Alignmentand Adjustments 6 Troubleshooting 7 Exploded Views and Parts List 8 Wiring Diagrams 1 Precaution Follow these special safety precautions Although the microwave oven is completely safe during ordinary use repair work can be extremely hazardous due to possible exposure to microwave radiation as well as potentially lethal high voltages and currents 1 1 Safety precautions B pi 9 N 25 All repairs should be done in accordance with the procedures described in this manual This product complies with Federal Performance Standard 21 CFR Subchapter J DHHS Microwave emission check should be performed to prior to servicing if the oven is operative If the oven operates with the door open Instruct the user not to operate the oven and contact the manufacturer and the center for devices and radiological health immediatly Notify the Central Service Center if the microwave leakage exceeds 5 mW cm2 Check all grounds Do not power the MWO from a 2 prong AC cord Be sure that all of the built in protective devices are replaced Restore any missing protective shields When reinstalling the chassis and its assemblies be sure to restore all protective devices
8. Never alter or add to the mechanical or electrical design of the MWO Any design changes or additions will void the manufacturer s warranty 10 Always unplug the unit s AC power cord from the AC power source before attempting to remove or reinstall any component or assembly Never defeat any of the B voltage interlocks Do not apply AC power to the unit or any of its assemblies unless all solid state heat sinks are correctly installed Some semiconductor solid state devices are easily damaged by static electricity Such components are called Electrostatically Sensitive Devices ESDs Examples include integrated circuits and field effect transistors Immediately before handling any semiconductor components or assemblies drain the electrostatic charge from your body by touching a known earth ground Always connect a test instrument s ground lead to the instrument chassis ground before connecting the positive lead always remove the instrument s ground lead last 1 1 Pretaution 1 2 Special Servicing Precautions Continued 17 When checking the continuity of the witches or transformer always make sure that the power is OFF and one of the lead wires is disconnected 18 Components that are critical for safety are indicated in the circuit diagram by shading A 19 Use replacement components that have the same ratings especially for flame resistance and dielectric strength specifications A replacem
9. be less than 4mW cm after repair or adjustment M aximum allow able leakage is 5mW cm 4mW cm is used to allow for measurement and meter accuracy 5 11 Check for Microw ave Leakage 1 Remove the outer panel 2 Pour 275 15cc of 2045 C 68 9 F water in a beaker which is graduated to 600cc and place the beaker in the center of the oven 3 Start the oven at the highest power level 4 Set survey meter dual ranges to 2 450 2 5 Using the survey meter and spacer cone as described above measure arnear the opening of magnetron the surface of the air guide and the surface of the wave guide as shown in the following photo but avoid the high voltage components The neading should be less than 4mW cm2 5 12 Note on Measurement 1 Do not exceed the limited scale 2 The test probe must be held on the grip of the handle otherwise a false reading may result when the operator s hand is between the handle and the probe 3 When high leakage is suspected do not move the probe horizontally along the oven surface this may cause damage to the probe 4 Follow the recommendation of the manufacturer of the microwave energy survey meter 5 13 Leakage Measuring Procedure 5 13 1 Record keeping and notification after measurement 1 After adjustment and repair of a radiarion preventing device make a repair record for the measured values and keep the data 2 If the radiation leakage is more than 4
10. blows with H V Trans secondary open the transformer may be faulty 1 Fuse blown out Check fuse Replace the fuse 2 Poor contact of Check continuity of power supply cord Also check Adjust or replace the power cord whether the power cord is securely wired power supply cord 3 Defective lamp The fan motor rotates but lamp does not light Replace the lamp Oven lamp 4 Defective timer Check the terminals of timer for continuity Replace the timer does not contacts turning the timer knob ON and OFF repeatedly light 5 Thermal cutout In this case the oven lamp and fan do not Replace the S W open turn on thermal cutout S W 1 Defective If 220 230V is found at motor terminals the motor Replace the motor Fan does fan motor should be replaced not operate 2 Defective con tacts of timer The oven lamp does not light and fan motor does not operate Replace the timer NOTE Interlock monitor switch must be replaced when the fuse is blown out Samsung Electronics 6 1 Troubleshooting 6 1 Electrical Malfunction Continved Parts Cause Diagnosis Remedy 1 Too small If a small amount of food is heated for a long time To increase the oven a load period of microwave may turn off during operation load add a glass of M icrow ave water into the oven turns off during cook 2 Defective Check to see if the magnetron thermal cutout switch is Replace thermal cuto
11. mW lt after determining that all parts are in good condition functioning properly and the identical parts are replaced as listed in this manual notift that fact to CENTRAL SERVICE CENTER 5 13 2 At least once a year have the microwave energy survey meter checked for accuracy by its manufacturer 5 4 Samsung Electronics 6 Troubleshooting WARNING FOR HIGH VOLTAGE 4000 VOLTS EXIST AT THE HIGH VOLTAGE AREA DO NOT OPERATE THE OVEN WITH CABINET PARTS REM OVED DO NOT OVE THE CABINET PARTS IF THE POWER SUPPLY CORD IS PLUGGED IN THE WALL OUTLET UNPLUG THE POWER CORD BEFORE SERVICING 6 1 Electrical Malfunction Parts Cause Diagnosis Remedy Fuse blows Defective primary Check continuity of the primary switch terminals with Replace the primary out when interlock switch wire removed using a multimeter If there is continuity interlock switch door is ary winding between switch terminals when door is opened opened the switch is defective Defective interlock Check continuity of the monitor switch terminals Replace the interlock monitor switch with wire removed by using a multimeter monitor switch If there is continuity between switch terminals when the door is closed the switch is defective Fuse is Layer short of the The fuse will not blow right away but if it blows in a Replace H V Transformer open secondary coil of few seconds then there is a layer short H V Transformer If the fuse
12. source N Remove the 10A fuse in the fuse holder ies When replacing the 10A fuse be sure to use an exact replacement part If new 10A fuse blows out again after replacement check the primary interlock switch door sensing switch and interlock monitor switch 4 When the above three switches operate properly check if any other part such as the control circuit board blower motor or high voltage transformer is defective 4 5 Replacement of Drive Motor 1 Take out the glass tray guide roller and coupler from cavity Drive M otor Turn the oven upside down to replace the drive motor Remove a screw securing the drive motor cover Disconnect all the lead wires from the drive motor gg amp Remove screws securing the drive motor to the cavity Remove the drive motor N When replacing the drive motor be sure to remount it in the correct position Connect all the leads to the drive motor Drive M otor Cover Screw the deive motor cover to the base plate with screw driver 10 Remount the coupler in the correct position Samsung Electronics 4 3 5 Alignment and Adjustments PRECAUTION capacitor 1 High voltage is present at the high voltage terminal of the high voltage transformer during any cook cycle 2 It is neither necessary nor advisable to attempt measurement of the high voltage 3 Before touching any oven components or wiring always un
13. the cooking tray as illustrated in figure P D below and start heating 5 After heating for 2 minutes measure the temperatures of water each N beaker sa oL 6 Microwave heat distribution rate can be caicviated as follows Cooking Tray Minimum Temperature Rise Heat Distribution X 100 Maximum Temperature Rise The result should exceed 65 Samsung Electronics 5 3 Alignment and Adjustments 5 10 Procedure for Measurement of Microwave Energy Leakage 1 Pour 275 15cc of 20 2e5 68 94u water in a beaker which is graduated to 600cc and place the beaker in the center of the oven 2 Start to operate the oven and measure the leakage by using a microwave energy survey meter 3 Set survey meter with dual ranges to 2 450MHz 4 When measuring the leakage always use the 2 inch spacer cone with the probe Hold the probe perpendicular to the cabinet door Place the spacer cone of the probe on the door and or cabinet door seam and move along the seam the door viewing window and the exhaust openings moving the probe in a clockwise direction at a rate of 1 inch sec If the leakage testing of the cabinet door seam is taken near a corner of the door keep the probe perpendicular to the areas making sure that the probe end at the base of the cone does not get closer than 2 inches to any metal If it gets closer than 2 inches erroneous readings may result 5 Measured leakage must
14. 033A DE60 10033A DE60 10033A DE60 10080A DE60 10080A DE60 10082A DE60 10082A DE60 10082A DE60 10082A DE60 10082A DE60 10098A DE60 10098A DE60 10098A DE60 10098A DE60 10069A DE02 00029A SCREW TAP 3 M4L10 SWR10 ZPC2 TOO SCREW TAP 3 M4L10 SWR10 ZPC2 TOO SCREW TAP 3 M4 L10 SWR10 ZPC2 TOO SCREW TH TH M 4 L10 M SWR10 FEFZY SCREW TH TH M 4 L10 M SWR10 FEFZY SCREW TH TH M 4 L10 M SWR10 FEFZY SCREW W ASHER M 5 11225 SCREW W ASHER M 5 L12 25 SCREW A M 4 L12 25 THOOTHED SCREW A M 4 L12 25 THOOTHED SCREW A M 4 L12 25 THOOTHED SCREW A M 4 L12 25 THOOTHED SCREW A M 4 L12 25 THOOTHED SCREW ASSY TC M 4X8 SW RCH18A ZPC2 SCREW ASSY TC M 4X8 SW RCH18A ZPC2 SCREW ASSY TC M 4X8 SW RCH18A ZPC2 SCREW ASSY TC M 4X8 SW RCH18A ZPC2 SCREW TAP TH TH M 4 L10 FRFZY TAPE SCOTCHPAR POLY ESTER 3M 893 W 50 B DR M N F EA P C EA HI LOW HI UPP P RELY MGT TNS HV B PLTE BD LAT CV AIR PN OUT B HVC CV TCO M DRIV M G TCO TIM ER 36 DOOR wo FP N FY A N Lr N Ul A A Lr N N FY YF LE Samsung Electronics 8 Wiring Diagram Wiring Diagram
15. 6 2 Unsatisfactory Cooking Parts Cause Diagnosis Remedy 1 Open cathode Check the terminals with a multimeter to see Replace magnetron of magnetron if the heater circuit is open 2 Defective Check the H V Diode for continuity in the reverse and Replace V Diode Diode normal directions using megger If there is continuity in the reverse direction the V Diode may be faulty In this event H V Capacitor will be hot 3 Shorted Connect megger leads to quick connect terminal amp Replace magnetron magnetron body of the magnetron if there is continuity the magnetron may be faulty In this case the main fuse will be blown Food is 4 Defective If there is a crack in the magnetron antenna dome Replace magnetron not heated magnetron the magnetron is defective 5 Poor contact Check if the screws are secured well to the door hinge Replace or adjust of primay and pressing it ON and OFF repeatedly interlock switch 6 Open coil of Check the continuity of primary coil and secondary Replace the H V Trans Coil If there is no continuity H V Transformer is H V Transformer former defective 7 Shorted H V Check the continuity of capacitor Replace the capacitor If the capacitor shorts the fuse blows H V Capacitor 8 Monitor fuse Check the monitor fuse Replace the blown out on the noise filter M onitor fuse 6 3 Part Check List Symptom Related Parts Check Points R
16. N OM 75PH 31 ESS 1 M 9 DE93 20001A ASSY BODY LATCH 2ND W 1 M 97G45 M 9745 1 M 10 4713 001004 LAM P INCANDESCENT 230V 40W ORG 25x 1 M 12 DE71 60010A COVER AIR PP TB53 T1 7 WHT 646 M 745 1 M 13 DE27 10020A COIL MC CHOKE TC 101 1 M 14 DE66 90013A LEVER DOOR POM F20 01 NTR M W 5630T 1 M 15 DE26 10121B TRANS H V SHV 745EC1 230V 2230V 3 35V 50 1 A 16 DE61 50106A BRACKET HVC SECC T0 8 W 31 L125 8 1 M 17 2501 001036 C OIL 950nF 2100V BK 35x54x85 20mm 1 M 18 DE59 40001A DIODE H V HVR 1X 32B 12 1 M 19 DE91 70061B ASSY H V FUSE THV060T 0750 H 5KV 0 75A RED 1 M 20 DE61 40017A FOOT PP A353 M W 56307 2 M 21 DE31 10154A M OTOR DRIVE M 2HJ 49ZR02 ST 16 1V 5 6 1 M 22 DE80 10003A BASE PLATE SGCC1 Z T0 8 W 340 L550 745 1 M 23 DE47 20033A THERM OSTAT PN 2N 80 70 125V7 5A 187 1 M 24 DE71 60011A COVER M GT PP 12 0 WHT M 745 1 M 25 DE61 80004A HINGE LOW ER SCP1 T2 3 ZN COATING M 745 1 26 DE61 80005A HINGE UPPER SCP1 T2 3 ZN COATING 745 1 M 27 ASSY DOOR M 736 M 746 KET WHT S S BASIC 1 e A M 28 ASSY CONTROL BOX 230V50HZ M 736 XET WHT S S BASIC 1 e A M29 DE74 20102B TRAY COOKIN G GLASS T5 0 PI288 780G M 745 1 M 30 DE92 90436A ASSY GUIDE ROLLER D16 5 M W4370W 1 M 31 DE67 60002A COUPLER PPS 5GR BRN M 97645 1 A Warning Option Parts A Electrostatically Sensitive Devices 7 2 Samsung Electronics Exploded Views and Parts List 7 3 Assembly Door Parts List
17. emedy Microwave H V Transformer 1 Check if the primary and secondary coil is open or shorted Replace cooking does Resistance of primary coil Approx 2 308Y _ not work Resistance of secondary coil Approx 1238Y 2 Check if the M GT Heater Voltage is approx 3 3V AC Caution High voltage H V Capacitor Check continuity of capacitor between two Replace terminals with H V wire lead removed The resistance should be approx 10M it s failure H V Diode 1 If there is no continuity in forward direction the H V Diode is open Replace 2 If there is continuity in reverse direction it s shorted Fan motor Fan motor Check if the motor coil is open Replace does not rotate Samsung Electronics 6 3 7 Exploded Views and Parts List 7 1 Main Exploded View 31 7 1 Samsung Electronics Exploded Views and Parts List 7 2 Main Parts List Ref No Parts No Description Specification Q ty Remarks M 1 DE70 30116B PANEL OUTER SECC T0 6 W 351 7 L1014 7 WHT CO 1 M 2 DE63 90035G CUSHION RUBBER DFA20 T2 W 190 L100 BLK 1 M 3 DE39 20054D ASSY POWER CORD KKP 4819D B206 250V6A 11500 1 M 4 DE39 40539A ASSY WIRE HARNESS A 230V50HZ M 935 1 M5 DE91 40095A ASSY NOISE FILTER SN E10D 250V 10A 2 1 M 6 DE31 30031A FAN M OTOR SM F745EA 230V 50HZ ASSY FAN M OTOR 1 M 7 DE47 20009A THERM OSTAT CS 7SA 160 60 187Y 250V7 5A 160 1 M 8 DE03 30029A M AGNETRO
18. ent part that does not have the same safety characteristics as the original might create shock fire or other hazards 1 3 Special High Voltage Precautions 1 High Voltage Warning Do not attempt to measureany of the high voltages this includes the filament voltage of the magnetron High voltage is present during any cook cycle Before touching any components or wiring always unplug the oven and discharge the high voltage capacitor See Figure 1 1 2 The high voltage capacitor remains charged about 30 seconds after disconnection Short the negative terminal of the high voltage capacitor to to the oven chassis Use a screwdriver Fig 1 1 Discharging the High Voltage Capacitor 3 High voltage is maintained within specified limits by close tolerance safety related components and adjustments If the high voltage exceeds the specified limits check each of the special components 1 2 Samsung Electronics 2 Specifications 2 1 Table of Specifications M 736 POW ER SOURCE POWER CONSUM PTION OUTPUT POW ER OPERATING FREQUENCY TIMER COOLING M ETHOD M AGNETRON OUTSIDE DIM ENSIONS SHIPPING W EIGHT 230V 50Hz AC 1300W FROM 120W TO 800W 9 LEVEL POWER IEC 705 TEST PROCEDURE 2450M Hz 60 MINUTES COOLING FAN MOTOR OM 755031 489 W x 275 H x 344 D mm APPROX 14 5 Kg Samsung Electronics 2 1 3 Operating Instructions 3 1 Control Panel 400w 560w 0 120
19. er of the cooking tray Set the oven to high power and operate for 52 3 seconds exactly 2 seconds included as a holding time of magnetron oscillation 4 When heating is finished stir the water again with the thermometer and measure the temperature rise as T2 5 Subtract R1 from T2 This will give you the water temperature rise AT 6 The output power is obtained by the following formula 52 3 Heating Time sec Output W 100 x AT 4 187 x 1000 x AT 4 187 Coefficient for Water Output Power 1000 Water cc 52 3 Temperature Rise T2 T1 7 Normal temperature rise for this model is 9 C to 11 C at HIGH NOTE 1 Variations or errors in the test procedure will cause a variance in the temperature rise Additional power test should be made if temperature rise is marginal NOTE 2 Output power in watts is computed by multiplying the temperature rise step E by a power factor of 91 in case of centigrade temperature 5 7 Microw ave Heat Distribution Heat Evenness The microwave heat distribution can be checked indirectly by measuring the water temperature risen at certain positions in the oven 1 Prepare five beakers made of Pyrex having 100 milliliters capacity each 2 Measure exactly 100milliliters off water load with a measuring cylinder and pour it into each beaker 3 Measure the temperature of each water load Readings shall be taken to the first place of decimals op 4 Puteach beaker in place on
20. king close the door Completely Turn the TIM ER knob to 0 3 6 Manual Defrosting Food 1 Place the frozen food in the oven and close the door 2 Turn the COOKING POWER CONTROL knob to Defrost symbol 3 Turn the TIMER knob to select appropriate time Result Defrosting begins When Defrosting has finished the oven beeps 3 7 Instant Cook Guide 1 Place the food in the oven and close the door 2 Turn the COOKING POWER CONTROL knob to Max Power 3 Turn the TIMER knob to select instant cook drinks or jacket potatoes Samsung Electronics Adding Extra Time Simply move the timer knob to any increased setting that you require 1 400w 240w 560w S Q 120w 300w Symbol Recipes Serving Size Power level Standing Time gt Drink 150mL 100 2 3mins Soup 200 300 2 3mins 0 Sauce ml 100 Fresh 200 300 Vegetables 9 100 2 3mins 3 3 4 Disassembly amp Reassembly 4 1 Replacement of Magnetron M otor Assembly and Lamp Remove the magnetron including the shield case permanent magnet choke coils and capacitors all of which are contained in one assembly 1 Disconnect all lead wires from the magnetron and lamp 2 Remove a screw securing the magnetron supporter 3 Remove the magnetron supporter 4 Remove the air cover 5 Remove screws securing the magnetron to the wave guide 6 Take out the magnetron very carefully
21. lat screwdriver into the gap between Door E and Door C to remove Door Be careful when handling Door C because it is fragile 4 3 3 Removal of Door E Following the procedure as shown in the figure insert and bend a thin metal plate between Door E and Door A until you hear the tick sound 1 Insertion depth of the thin metal plate should be 0 5mm or less 4 3 4 Removal of Key Door amp Spring Remove pin hinge from Door E Detach spring from Door E and key door 4 2 crews Upper Hinge Lower Hinge Screws M Door E Samsung Electronics Disassembly amp ReaAssembly 4 3 5 Reassembly Test After replacement of the defective component parts of the door reassemble it and follow the instructions below for proper installation and adjustment so as to prevent an excessive microwave leakage 1 When mounting the door to the oven be sure to adjust the door parallel to the bottom line of the oven face plate by moving the upper hinge and lower hinge in the direction necessary for proper alignment 2 Adjust so that the door has no play between the inner door surface and oven front surface If the door assembly is not mounted properly microwave energy may leak from the space between the door and oven 3 Do the microwave leakage test 4 4 Replacement of Fuse Disconnect the oven from the power
22. plug the oven from its power source and discharge the high voltage 5 1 High Voltage Transformer 1 Remove connectors from the transformer terminals Filament Terminals check continuity 2 Normal resistance readings should be as follows Secondary Approx 131 50 Pilament ss Approx 0Q Primary Leid niat Approx 2 29Q Primary Room temperature 2040 Terminals 5 2 Magnetron 1 Continuity checks can only indicate an open filament or a shorted magnetron To diagnose an open filament or shorted magnetron 2 Isolate the magnetron from the circuit by disconnecting its leads 3 A continuity check across the magnetron filament terminals should indicate one ohm or less 4 A continuity check between each filament terminal and the magnetron case should read open Samsung Electronics Secondary Terminal M agnetron Antenna Gasket Plate Cooling Fins 5 1 Alignment Adjustments 5 3 High Voltage Capacitor 1 Check continuity of the capacitor with meter set at the highest ohm scale 2 Once the capacitor is charged a normal capacitor shows continuity for a short time and then indicates 10M2 3 A shorted capacitor will show continuous continuity 4 An open capacitor will show constant 10MQ 5 Resistance between each terminal and chassis should read infinite 5 4 High Voltage Diode 1 Isolate the diode from the circuit by disconnecting its leads 2 Wi
23. th the ohm meter set at the highest resistance scale measure the resistance across the diode terminals Reverse the meter leads and read the resistance A meter with 6V 9V or higher voltage batteries should be used to check the front to back resistance of the diode otherwise an infinite resistance may be read in both directions The resistance of a normal diode will be infinite in one direction and several hundred KQ in the other direction 5 5 Adjustment of Primary Switch Secondary Swithc and Monitor Switch Precaution For continued protection against radiation hazard replace parts in accordance with the wiring diagram and be sure to use the correct part number for the following switches Primary and secondary interlock switches and the interlock monitor switch all together Then follow the adjustment procedures below After repair and adjustment be sure to check the continuity of all interlock switches and the interlock monitor switch 1 When mounting Primary switch and Interlock Monitor switch to Latch Body consult the figure below 2 NOTE No specific adjustment during installation of Primary Interlock Switch Primary switch and Monitor switch to the latch body is necessary 3 When mounting the Latch Body to the oven assembly Interlock M onitor adjust to the Latch Body by moving it so that the oven Switch door will not have any play Check for play in the door by pulling the door assembly Make sure that the latch
24. ut ing cycle magnetron activated at a temperature higher than 1500C switch thermal cutout S W Electric Incomplete sure that grounding of the power supply cord has Rewire shock is qrounding been done properly felt Door does 1 Broken door Remove the cabinet for inspection Replace door hinges not operate hinges Check the door hinge properly 2 Missing or Check if the screws are secured well to the door hinge Fasten or tighten loose screw 1 Defective If the timer does not operate with 220 230V applied to the Replace timer Timer does timer motor terminals the timer motor amy be faulty not operate 2 Defective The lamp does not light Replace timer contacts of timer S W Cooking tray 1 Defective Check to see if 21A exists at the motor terminals Replace drive motor does not drive motor If so motor will be defective rotate 1 Blocking of Check if the air inlet or outlet ventilation is blocked Keep a distance of the ventilatior by the wall or other objects 100mm from the wall or the objects M agnetron 2 Defective If the fan motor does not operate with 220 230V applied Replace fan motor thermal fan motor to the terminal the motor may be faulty cutout switch 3 Too small a If a small amount of food is heated repeatedly over To increase the oven OFF load or no a long period of time microwave turns off during load place a glass of load operation water into the oven 6 2 Samsung Electronics Troubleshooting
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