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Samsung Electronics

6. Troubleshooting

6-1

PRECAUTION

1. CHECK GROUNDING BEFORE CHECKING FOR TROUBLE.
2. BE CAREFUL OF THE HIGH VOLTAGE CIRCUIT.
3. DISCHARGE THE HIGH VOLTAGE CAPACITOR.
4. WHEN CHECKING THE CONTINUITY OF THE SWITCHES OR TRANSFORMER, DISCONNECT ONE LEAD WIRE FROM THESE

PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON. TO DO OTHERWISE MAY RESULT IN A FALSE
READING OR DAMAGE TO YOUR METER.

5. DO NOT TOUCH ANY PART OF THE CIRCUIT OR THE CONTROL CIRCUIT BOARD, SINCE STATIC DISCHARGE MAY DAMAGE IT.

ALWAYS TOUCH GROUND WHILE WORKING ON IT TO DISCHARGE ANY STATIC CHARGE BUILT UP.

6-1 Electrical Maltunction

SYMPTOM

CAUSE

CORRECTIONS

Oven is dead.

1. Open or loose lead wire harness

Check fan motor when thermal cutout is defective.

Fuse is OK.

2. Open thermal cutout (Magnetron)

No display and no operation at all. 3. Open low voltage transformer

Check Ass'y PCB when LVT is defective.

4. Defective Ass'y PCB

No display and no operation at all. 1. Shorted lead wire harness

Check adjustment of primary, interlock monitor,

Fuse is blown.

2. Defective primary latch switch (NOTE 1)

power relay, door sensing switch.

3. Defective monitor switch (NOTE1)
4. Shorted HVCapacitor
5. Shorted HVTransformer (NOTE2)

NOTE 1: All of these switches must be replaced at the same time.

(refer to adjustment instructions)
Check continuity of power relay contacts and if it has continuity, replace power
relay also.

NOTE 2: When HVTransformer is replaced, check diode and magnetron also.

Oven does not accept

1. Key input is not in-Sequence

Refer to operation procedure.

key input (Program)

2. Open or loose connection of membrane

key pad to Ass'y PCB

3. Shorted or open membrane panel
4. Defective Ass'y PCB

Replace PCB main.

1. Off-alignment of latch switches

Adjust door and latch switches.

2. Open or loose connection of high voltage

circuit especially magnetron filament
circuit

NOTE: Large contact resistance will bring
lower magnetron filament voltage and

Timer starts countdown but no

cause magnetron to lower output and/or

microwave oscillation.

intermittent oscillation.

(No heat while oven lamp and

3. Defective high voltage components

Check high voltage component according to

fan motor turn on.)

H.V.Transformer

component test procedure and replace if it is

H.V.Capacitor

defective.

H.V.Diode, H.V.Fuse
Magnetron

4. Open or loose wiring of power relay
5. Defective primary latch switch
6. Defective power relay or Ass'y PCB

Replace PCB main.

Содержание M1732

Страница 1: ...Y SERVICEManual MICROWAVE OVEN CONTENTS M1732 M1733 1 Precaution 2 Specifications 3 Operating Instructions 4 Disassembly and Reassembly 5 Alignment and Adjustments 6 Troubleshooting 7 Exploded Views and Parts List 8 PCB Diagrams 9 Schematic Diagrams ...

Страница 2: ...hes interlock monitor switch 12 If the fuse is blown by the Interlock Monitor Switch Replace all of the following at the same time Primary door sensing switch and power relay as well as the Interlock Monitor Switch The correct adjustment of these switches is described elsewhere in this manual Make sure that the fuse has the correct rating for the particular model being repaired 13 Design Alteratio...

Страница 3: ...es 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 screwdrive...

Страница 4: ...UT POWER FROM 100 TO 800W IEC 705 TEST PROCEDURE OPERATING FREQUENCY 2 450MHz MAGNETRON OM75SH 31 COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 489 W x 275 H x 351 D 2 2 Comparison Chart MODEL FEATURE HOLD TIMER O M1733 MORE LESS AUTO COOK DISH AUTO DEFROST O TIME COOK O POWER LEVEL O INSTANT COOK O MEMORY BOOST O CHILD LOCK CLOCK O GRILL COMBI M1732 M1733 ...

Страница 5: ...ng and Serving Selection 6 Microwave Mode Selection 7 Start Button 8 Stop Cancel Button M1732 M1733 1 2 6 5 4 3 7 8 3 Operating Instructions 3 1 Control Panel 3 2 Features External Views LIGHT VENTILATION HOLES DOOR DOOR LATCHES ROLLER RING OPEN DOOR PUSH BUTTON SAFETY INTERLOCK HOLES COUPLER TURNTABLE 489mm 357mm 275mm 200mm 351mm ...

Страница 6: ...ve nuts from the back panel 7 Take out the fan motor 8 Remove the oven lamp by rotating to pull out from hole of air cover NOTE1 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 1 Discharge the hi...

Страница 7: ... the figure insert and bend a thin metal plate between Door E and Door A until you hear the tick sound Insertion depth of the thin metal plate should be 0 5mm or less Insert flat screwdriver into the gap between Door A and Door C to remove Door C Be careful when handling Door C because it is fragile Then remove the door assembly 4 3 1 Removal of Door C 4 3 2 Removal of Door E Door C Door A Door E ...

Страница 8: ... remount it in the correct position 8 Connect all the leads to the drive motor 9 Screw the deive motor cover to the base plate with a screw driver 10 Remount the coupler in the correct position 4 4 Replacement of Fuse 4 5 Replacement of Drive Motor Disassembly and Reassembly Screw Drive Motor Cover Base Plate Drive Motor After replacement of the defective component parts of the door reassemble it ...

Страница 9: ...e Ass y control box 4 When reconnecting the FPC connector make sure that the holes on the connector are properly engaged with the hooks on the Plastic Fastener 1 Window display should not be disassembled as its mounting tabs will be broken If repair work is difficult replace with Ass y control panel 2 The membrane key board is attached to the escutcheon base with doublefaced adhesive tape Therefor...

Страница 10: ...nal and magnetron case should read open 1 The low voltage transformer is located on the control circuit board 2 Remove the low voltage transformer from the PCB Ass y and check continuity 3 Normal resistor reading is shown in the table PRECAUTION 1 High voltage is present at the high voltage terminals during any cook cycle 2 It is neither necessary nor advisable to attempt measurement of the high v...

Страница 11: ...just the Latch Body by moving it so that the oven door will not have any play in it Check for play in the door by pulling the door assembly Make sure that the latch keys move smoothly after adjustment is completed Completely tighten the screws holding the Latch Body to the oven assembly 4 Reconnect to Monitor switch and check the continuity of the monitor circuit and all latch switches again by fo...

Страница 12: ...ional 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 factor of 91 times the of centigrade temperature The microwave heat distribution can be checked indirectly by measuring the water temperature rise at certain positions in the oven 1 Prepare five beakers made of Pyrex having 100 milliliters capacit...

Страница 13: ...r 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 mW cm2 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 check...

Страница 14: ...sing switch 3 Defective monitor switch NOTE1 4 Shorted HVCapacitor 5 Shorted HVTransformer NOTE2 NOTE 1 All of these switches must be replaced at the same time refer to adjustment instructions Check continuity of power relay contacts and if it has continuity replace power relay also NOTE 2 When HVTransformer is replaced check diode and magnetron also Oven does not accept 1 Key input is not in Sequ...

Страница 15: ...noise can be heard 1 Loose fan and fan motor Tighten screws of fan motor 2 Loose screws on H V Transformer Tighten screws of H V Transformer 3 Shorted H V Diode Replace H V Diode Turntable motor does not rotate 1 Open or loose wiring of turntable motor Replace turntable motor 2 Defective turntable motor Oven stops operation during cooking 1 Open or loose wiring of primary Adjust door and latch swi...

Страница 16: ... 7 1 Exploded Views 7 1 M1 M4 M3 M5 M9 M8 M11 M20 M21 M23 M25 M26 M18 M17 M16 M27 M28 M29 M32 M30 M6 M7 M10 M2 M33 M12 M13 M15 M12 M14 M22 M24 M19 M 31 D6 C1 C2 C3 C4 C5 C6 C7 D1 D2 D3 D5 D4 C1 C2 C3 C4 C5 C6 C7 D1 D2 D3 D5 D6 D4 M1732 M1732 M1733 M1733 ...

Страница 17: ...LER MW4370W D16 5 XAREX 1 M18 DE67 60075A COUPLER PPS 7G BRN M97G45 1 M19 DE73 90027A FERRITE CORE NI ZN T13 8 W21 0 L28 0 BNF 14 1 M20 2501 001011 C OIL 910nF 2100V BK 54x35x75mm 20mm 1 M21 DE61 50106A BRACKET HVC SECC T0 8 W31 L125 8 1 M22 DE59 40001A DIODE H V HVR 1X 32B 12 1 M23 DE91 70061B ASSY H V FUSE THV060T 0750 H 5KV0 75A RED 1 M24 DE26 10158A TRANS H V SHV 173EC 230V 2220 3 40V 50Hz 1 M...

Страница 18: ...S HSWR10 PI0 6 D6 0 L22 3 BLU 1 Ref No Parts No Description Specification Q ty Remarks D 1 DE64 40316B DOOR A TDS M1732 12 1 WHITE D 1 DE64 40316D DOOR A ABS 200G D GRY M1732 D AMF 3RD S1 1 GRAY D 2 DE67 20196A SCREEN DOOR S1 3RD 0 7 1 D 3 DE94 00124B ASSY DOOR SUB MW4593G BLK 3RD 0 7 1 D 4 DE64 40008B DOOR C PP T1 5 BLK CE745G 1 D 5 DE64 40006A DOOR KEY POM TC3005 T2 0 12GR BLK CE94 1 D 6 DE61 70...

Страница 19: ... 2 B LATCH DE60 10082H SCREW A 2S 4X12 TOOTHED 4 B PLATE DE60 10082H SCREW A 2S 4X12 TOOTHED 1 C BLOWER DE60 10082H SCREW A 2S 4X12 TOOTHED 2 C BOX DE60 10082H SCREW A 2S 4X12 TOOTHED 4 O PANEL DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRCH18A ZPC2 GLD W 1 CAVITY TCO DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRCH18A ZPC2 GLD W 2 D MOTOR DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRCH18A ZPC2 ...

Страница 20: ...8 P C B Diagrams 8 1 P C B Diagrams 8 1 Samsung Electronics ...

Страница 21: ... C10 P14 2401 000244 C AL 100uF 20 10V GP TP 6 3x7 5 1 C03 P15 2401 000914 C AL 22uF 20 16V GP TP 5x11 5 2 C05 C09 P16 2401 001212 C AL 4 7uF 10 50V GP TP 5x11 5 1 C08 P17 2401 002420 C AL 470uF 20 16V GP TP 10x12 5mm 1 C02 P 18 2401 002598 C AL 220uF 20 50V GP TP 10x16 5 1 C01 P19 2802 000161 RESONATOR CERAMIC 4MHz 0 5 TP 10 0x5 0x7 5mm 1 XTL1 P20 3711 000940 CONNECTOR HEADER BOX 4P 1R 2 5mm STRA...

Страница 22: ...cs 9 Schematic Diagrams 9 1 Schematic Diagrams RED RED BRN BLU FA F HIGH VOLTAGE TRANSFORMER H V FUSE HIGH VOLTAGE CAPACITOR HIGH VOLTAGE DIODE TO CHASSIS MAGNETRON SYMBOL COLOR ORG ORANGE BRN BROWN RED RED BLU BLUE RED RED ...

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