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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 m965ce

Страница 1: ...anual MICROWAVE OVEN CONTENTS 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 SEAU ...

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: ...e terminal of the high voltage capacitor to to the oven chassis Use a screwdriver 3 High voltage is maintained within specified limits by close tolerance safety related components and adjustments If the high voltage exceeds the specified limits check each of the special components 1 2 Pretaution Samsung Electronics 1 2 Special Servicing Precautions Continued 1 3 Special High Voltage Precautions PR...

Страница 4: ...WER IEC 705 TEST PROCEDURE OPERATING FREQUENCY 2 450MHz MAGNETRON OM75PH 31 COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 517 W x 297 H x 385 D POWER LEVEL M965CE 10 100W 4 sec 26 sec 20 200W 7 sec 23 sec 30 300W 10 sec 20 sec 40 400W 13 sec 17 sec 50 500W 16 sec 14 sec 60 600W 19 sec 11 sec 70 700W 22 sec 8 sec 80 800W 25 sec 5 sec 90 900W 28 sec 2 sec 100 1000W 30 sec 0 sec ON TIME OFF TIM...

Страница 5: ...art Button More Less Button Sensor Reheat Drinks Pasta Memory I Hold Timer Clock AutoStart Memory II Sound Help Mate Auto Defrost Power Level One Minute More Less 1 2 3 4 5 6 7 8 0 Pause Cancel M965CE Start 9 Peeled Potatoes Baked Beans Frozen Vegetables Stewed Fruit Sensor Cook 3 Operating Instructions 3 1 Control Panel 3 2 Features External Views Door Ventilation Holes Safety Interlock Holes Con...

Страница 6: ...y 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 high voltage capacitor 2 Disconnect all the leads 3 Remove the mounting bolts 4 Reconnect the leads correctly and firmly 4 1 Replacement of High Voltage Transformer Lamp Magnetron H V Trans H V Capacit...

Страница 7: ...ndling Door C because it is fragile 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 Remove pin hinge from Door E Detach spring from Door E and key door 4 3 2 Removal of Door C 4 3 3 Removal of Door E 4 3 4 Removal of Key Door Spring Disassembly...

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: ...onnecting 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 Therefore applying hot air such as usi...

Страница 10: ...t terminal 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 Filament Terminals Secondary Terminal Primary Terminals Secondary Approx 130W Filament Approx 0W Primary Approx 1 700W Terminals Resistance 1 2 Input 1 000W 3...

Страница 11: ...djust 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 f...

Страница 12: ...n 4 When heating is finished stir the water again with the thermometer and measure the temperature T2 5 Subtract T1 from T2 This will give you the water temperature rise DT 6 The output power is obtained by the following formula 7 Normal temperature rise for this model is 9ûC to 11ûC at HIGH NOTE 1 Variations or errors in the test procedure will cause a variance in the temperature rise Additional ...

Страница 13: ...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 12 2 At least once a year have the microwave energy survey meter checked...

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: ... dishes Inform the customer touching on the oven wall 2 Ceramic ware trimmed with gold or Do not use any type of cookware with silver powder also causes sparks metallic trimming Uneven cooking Uneven intensity of microwave due to Wrap thinner parts of the food with its characteristics aluminum foil Use plastic wrap or cover with a lid Stir once or twice while cooking foods such as soup cocoa or mi...

Страница 16: ...d Parts List 7 1 Exploded Views 7 1 M1 M2 M32 M21 M22 M23 M31 M24 D1 D2 D3 D5 D6 M25 M26 M15 M14 M16 M18 M19 M20 M3 M4 M5 M33 M34 M35 M36 M37 M6 M7 M8 M30 M9 M10 M12 M13 M11 M29 B1 B2 B4 B3 M27 D4 D10 D7 D8 D9 M28 M17 C1 C2 C3 C4 C5 C6 C7 C8 ...

Страница 17: ...1 05uF 2 1KV BK 54x35x85 20 1 M18 DE59 40001A DIODE H V HVR 1X 32B 12 1 M19 DE91 70061A ASSY H V FUSE THV060T 0800 H 5KV 0 8A WHT 1 M20 DE61 40017A FOOT PP A353 BLK MW5630T 2 DVD EA M21 DE31 10154A MOTOR DRIVE M2HJ49ZR02 ST 16 50 60HZ 1 M22 DE80 10001B BASE PLATE SGCC T0 8 345 565 M965 XSA 1 M23 DE47 20173A THERMOSTAT PW 2N 90 60 30 187Y 250V7 5A 9 1 CV TCO M24 DE71 60382A COVER CEILING MICASHEET ...

Страница 18: ...175 MW5574W 1 Ref No Parts No Description Specification Q ty Remarks C 1 DE66 20006E BUTTON PUSH ABS VH 0855 P WHT M745 EUW 1 C 2 DE61 70076A SPRING BUTTON HSWR PI0 6 1 C 3 DE34 10223A SWITCH MEMBRANE PET 240V50HZ M965 XSA 89 9 185 1 C 4 DE67 40002A WINDOW DISPLAY RESIN ACRYLIC T2 3 M945 IDEO 1 C 5 DE72 70007B CONTROL PANEL RESIN ABS 120GR WHT VH 0800 M 1 C 6 RC W2 00 ASSY PCB MAIN 1 C 7 DE93 3053...

Страница 19: ...CREW WASHER M5 L12 2S 4 TNS HV DE60 10082H SCREW A 2S 4X12 TOOTHED 2 B PLTE DE60 10082H SCREW A 2S 4X12 TOOTHED 2 BD LAT DE60 10082H SCREW A 2S 4X12 TOOTHED 2 CN BOX DE60 10082H SCREW A 2S 4X12 TOOTHED 1 CV AIR DE60 10082H SCREW A 2S 4X12 TOOTHED 2 MO FAN DE60 10082H SCREW A 2S 4X12 TOOTHED 5 PN OUT DE60 10088A SCREW TAP PH PH M3 L8 FEFZY PLAIN 2 PCB DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRC...

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

Страница 21: ...ON 470OHM 5 1 8W AA TP 1 8X3 2MM 3 R01 R02 R12 P23 2001 000786 R CARBON 47KOHM 5 1 8W AA TP 1 8X3 2MM 5 R31 R32 R33 R34 R35 P23 2001 000786 R CARBON 47KOHM 5 1 8W AA TP 1 8X3 2MM 5 R36 R37 R38 R39 R40 P23 2001 000786 R CARBON 47KOHM 5 1 8W AA TP 1 8X3 2MM 5 R41 R42 R43 R44 R45 P23 2001 000786 R CARBON 47KOHM 5 1 8W AA TP 1 8X3 2MM 5 R46 R47 R48 R49 R50 P24 2001 000904 R CARBON 620OHM 5 1 8W AA TP ...

Страница 22: ...LAY INRUSH RELAY DOOR SENSING SWITCH DOOR SENSING SWITCH RESISTOR POWER RELAY MAIN RELAY F FA MAGNETRON NO COM NO COM NO NO COM BLU YEL BRN BRN BRN BLK BLU BLK 0V LAMP 230V40W L V TRANS PRIMARY LATCH SWITCH ORG ORG INTERLOCK MONITOR SWITCH L FM H V T H V D H V C H V FUSE 1mH BRN BROWN BLU BLUE ORG ORANGE RED RED WHT WHITE BLK BLACK YEL YELLOW GRN GREEN Y G YELLOW GREEN SYMBOL COLOR NOTE MAIN FUSE ...

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