SAMSUNG CM1019XET Service Manual

MICROWAVE OVEN

CM1019 / CM1029

SERVICE

Manual

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 Circuit Diagrams and Parts List

9. Wiring Diagram & Operating Sequence

+ 30sec

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(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.

any service test or inspection within the microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.

(d) Any defective or misadjusted

components in the interlock, monitor, door seal, and microwave generation and transmission systems 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 should be

performed on each oven prior to release to the owner.

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

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1. Precaution

1-1 Safety precautions ( )

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. All repairs should be done in accordance with the procedures described in this manual.

2. Microwave emission check should be performed prior to servicing if the oven is operative.

3. If the oven operates with the door open : Instruct the user not to operate the oven and contact the manufacturer and the centre for devices and radiological health immediately.

4. Notify the Central Service Centre if the microwave leakage exceeds 5 mW/cm2.

5. Check all grounds.

6. Do not power the microwave oven from a "2prong" AC cord. Be sure that all of the builtin protective devices are replaced. Restore any missing protective shields.

7. When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including: nonmetallic control knobs and compartment covers.

8. 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.

9. Inform the manufacturer of any oven found to have emmission in excess of 5mW/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.

10. Service technicians should remove their watches while repairing an microwave oven.

11. 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 door sensing switches, interlock monitor switch.

12. If the fuse is blown by the Interlock Monitor Switch: Replace all of the following at the same time: Primary and door sensing 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.

13. 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. Never alter or add to the mechanical or electrical design of the microwave oven. Any design changes or additions will void the manufacturer's warranty.

14. Always unplug the unit's AC power cord from the AC power source before attempting to remove or reinstall any component or assembly.

15. 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.

16. 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.

17. 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.

18.When checking the continuity of the switches or transformer, always make sure that the power is OFF, and one of the lead wires is disconnected.

19. Components that are critical for safety are indicated in the circuit diagram or parts list by shading, or .

20. Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.

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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 here)

2. The high-voltage capacitor remains charged about 30 seconds after disconnection. Short the negative terminal of the high-voltage capacitor 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.

Precaution

1-2 Special High Voltage Precautions

Note :Touch chassis side first then short to

the high voltage capacitor terminal by using a screwdriver.

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.

PRECAUTION

Servicemen should remove their watches whenever working close to or replacing the magnetron.

H.V.Capacitor

Negative Terminal

Screwdriver

Discharge the 2 High Voltage Capacitors before servicing !

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2. Specifications

2-1 Table of Specifications (CM1019)

MODEL

CM1019

ITEM

TIMER Max. 25 min

POWER SOURCE 230V/50HZ, AC

POWER CONSUMPTION MICROWAVE : 1,700W

OUTPUT POWER 1,000W (IEC-705)

OPERATING FREQUENCY 2,450MHz

MAGNETRON OM75P(20)ESS

COOLING METHOD FAN MOTOR

OUTSIDE DIMENSIONS 464(W) x 368(H) x 557(D)

NET WEIGHT 25 Kg

SHIPPING WEIGHT 28 Kg

2-2 Table of Specifications (CM1029)

MODEL

CM1029

ITEM

TIMER Max. 25 min

POWER SOURCE 230V/50HZ, AC

POWER CONSUMPTION MICROWAVE : 1,700W

OUTPUT POWER 1,000W (IEC-705)

OPERATING FREQUENCY 2,450MHz

MAGNETRON OM75P(20)ESS

COOLING METHOD FAN MOTOR

OUTSIDE DIMENSIONS 464(W) x 368(H) x 557(D)

NET WEIGHT 25 Kg

SHIPPING WEIGHT 28 Kg

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3. Operating Instructions

3-1 Features (CM1019)

OVEN LAMP (230V 25W)

DISPLAY

OVEN LAMP COVER

DOOR HANDLE

DOOR

+30sec PAD

STOP/CANCEL PAD

START BUTTON

CEILING COVER

SAFETY INTERLOCK HOLES

VARIABLE COOKING POWER CONTROL DIAL

TIMER DIAL

DOOR LATCHES PLATE TRAY

+ 30sec

OVEN LAMP (230V 25W)

DISPLAY

OVEN LAMP COVER

DOOR HANDLE

DOOR

CONTROL PANEL

+30sec PAD

STOP/CANCEL PAD

START BUTTON

CEILING COVER

SAFETY INTERLOCK HOLES

3-2 Features (CM1029)

DOOR LATCHES PLATE TRAY

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3-4 External Views

3-4-1 External Views (CM1019)

514

1000

368

444

464

486

530

557

514

1000

368

444

464

486

530

557

3-3 Control Panel (CM1029)

1. DISPLAY

2. PROGRAM PAD

3. PROGRAM LOCK PAD

4. NUMBER PADS(TIME, MEMORY PROGRAMMING)

5. POWER LEVEL SELECTOR PAD

6. DEFROST SELECTOR PAD

7. DOUBLE QUANTITY PAD

8. +30sec PAD (ONE TOUCH COOK PAD)

9. STOP/CANCEL PAD

10. START BUTTON

+ 30sec

1 2 4

3 5 6 7 8 9 10

Operating Instructions

3-4-2 External Views (CM1029)

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3-5 Operation Guide (CM1019)

Cooking/Reheating

1. Make sure the oven is plugged into a properly earthed electrical outlet and ÔONÕ appears in the display window.

2. Open the door. The oven lamp will be turned on.

3. Put the food into a suitable container, place it in the center of the oven and then close the door securely. Result: The oven lamp will go off.

4. Select the desired power level by rotating the COOKING POWER CONTROL DIAL. Result: The selected power level will be displayed in the display window.

5. Set the desired heating time by rotating the TIMER DIAL. Result: ÒONÓ blinks and the selected time is displayed in the display window.

6. Press pad: Result:The oven lamp and cooling fan will be turned on. Heating will start. The time on digital display will count down.

7. When all time is elapsed, the end of cycle Beep Tone will sound 4 times and all heating will stop. The oven lamp will go off. For 1 min, the display shows and the cooling fan will keep working in order to cool

down the interior parts. During the time, the fan will not stop even when you open the door. 1 min later it will stop and ON appears again. Food may be removed from oven whilst the fan is still running.

8. Open the door and take the food out.

9. Close the door. The oven lamp will go off.

NOTE: Whilst heating, one press on pad stops the oven. You can restart it by pressing the pad or a

second press on pad will cancel the selected program. When it is NOT in a heating cycle, one tap

on pad cancels the selected program. You can set the power level first and then the cooking time next, or vice versa. You can press +30sec button one or more times in order to add the cooking time by 30 seconds.

Operating Instructions

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3-5 Operation Guide (CM1019 continued)

To stop the cooking

You can stop cooking at any time so that you can:

· Check the food

· Turn the food over or stir it

· Leave it to stand

* Temporarily ; Open the door or press button once.

Result: Cooking stops. To resume cooking, close the door and press again.

* Completely ; Press the button twice.

Result: The cooking settings are cancelled.

If you want to cancel any cooking settings before starting cooking, simply press once.

Using the Defrost Feature

The Defrost feature enables you to defrost meat, poultry, fish.

NOTE: Only use containers that are microwave-safe.

1. Open the door.

2. Place the frozen food in the centre of the plate tray.

3. Close the door.

4. Rotate the Variable Cooking Power Control dial to the DEFROST HIGH( ) or DEFROST LOW( ) as you wish. Result: The DEFROST indicator appears on the digital display.

5. Rotate the TIMER dial to set the defrosting time. The Maximum time that can be set under defrosting mode is 50min.

6. Press button. Result: Defrosting begins.

Operating Instructions

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3-5 Operation Guide (CM1029)

Cooking/Reheating

NOTE: When you first plug in the power cord, the oven beeps once and all the indicators show for 5 sec in

the display window.

NOTE: When heating cycle is completed and you open the door, the oven lamp automatically turns on and

goes off 1 min later.

NOTE: When you open the door whilst in a heating cycle, the oven stops operating and the oven lamp

automatically turns on for 1 min and goes off 1 min later. If you leave the oven door open for more than 1 min, the oven beeps once every minute and after 5 min the power source check indicator ÔONÕ appears in the display window.

This oven is preset at the factory for automatic operation.

1. Make sure the oven is plugged into a properly earthed electrical outlet and ÔONÕ appears in the display window.

2. Open the door. The oven lamp will be turned on.

3. Put the food into a suitable container, place it in the centre of the oven and then close the door securely. Result: The oven lamp will go off.

4. Select the desired power level by pressing the Power Level Selector pad. Result: The selected power level will be displayed in the display window.

5. Set the desired heating time by pressing the Number pads. Result: The selected time is displayed in the display window.

6. Press START button: Result: The oven lamp and cooling fan will be turned on. Heating will start. The time on digital display will count down.

cool down the interior parts. During the time, the fan will not stop even when you open the door. 1 min later it will stop and ÔONÕ appears again. Food may be removed from oven whilst the fan is still running.

8. Open the door and take the food out.

9. Close the door. The oven lamp will go off.

Operating Instructions

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3-5 Operation Guide (CM1029 continued)

Using the Defrost Feature

NOTE: When the oven was operating for longer than 25 min under Defrosting cycle, you can NOT change

the power level from Defrosting to Heating(Cooking/Reheating) mode.

* Use only containers that are microwave-safe.

1. Open the door.

2. Place the frozen food in the centre of the plate tray.

3. Close the door.

4. Press the Defrost selector pad to set DEFROST HIGH ( ) or DEFROST LOW ( ) as you wish. Result: The selected DEFROST indicator appears in the display.

5. Press the Number pads to set the defrosting time. (Max. 50 min)

6. Press button. Result: Defrosting begins.

NOTE: It is not possible to set a defrosting time for longer than 50min. The defrost indicator will flash and it

is advisable to press CANCEL and enter a new defrost level and time.

Repeat Feature

You can repeat the previous cooking setting (regardless of manual or automatic memory heating) by pressing the START button. The oven starts with exactly the same heating time and power level that were used in the last operation. NOTE: The repeat feature will be cancelled once the power source is cut off.

Using +30sec Pad

This is a ONE TOUCH COOK pad. By touching the +30sec pad once, you can start heating instantly. You can increase the cooking time by pressing the +30sec pad while heating is being done. A cooking time increases by 30 seconds at each press on +30sec pad. But it can not exceed the maximum time. Like traditional cooking, you may find that, depending on the foodÕs characteristics or your tastes, you have to adjust the cooking times slightly. Before operating the oven, times can be increased/decreased using either the time pads or +30sec button. During the operating, time may only be added by using the +30sec button.

Operating Instructions

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3-5 Operation Guide (CM1029 continued)

Memory Pads Programming

1. Hold down PROGRAM LOCK pad and then press PROGRAM pad. Hold together for 2 sec. Be sure to press the pads firmly. Result: PROG indicator appears in the digital display.

2. Press appropriate NUMBER pad for the desired memory number. Result: Selected memory program code appears below the PROGRAM indicator.

3. Select power level by pressing the POWER LEVEL pad. Result:Default power level HIGH appears in the display at first press of the POWER LEVEL pad.

Press the POWER LEVEL pad one or more times until you get the desired power level.

4. Press NUMBER pads to set the cooking time. Result: The maximum time according to each cooking power level can be referred to in the title ÒPower Levels and Time VariationsÓ on page 8. The NUMBER pads will not operate or respond when you press a cooking time exceeding the maximum value.

NOTE: It is not possible to set a cooking time for longer than the maximum time allowed on the chosen

program. The power level indicator will flash and it is advisable to press CANCEL and to enter a new power level and cooking time.

5. Hold down PROGRAM LOCK pad and then press PROGRAM pad. Hold together for 2 sec once again. Result: PROG indicator and memory number indicator blink 3 times in the digital display with a beep

sound. And then the display goes blank.

Caution: Be sure to press the pads firmly in the right position.

6. When you want to program more, repeat the procedures above again. Memory programs are available up to 20 items. Make sure the unit is properly programmed. After programming is finished, all you have to do for memory cooking is to press the NUMBER pad. Then the selected memory program automatically starts cooking.

Operating Instructions

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3-5 Operation Guide (CM1029 continued)

How to Operate Memory Cooking

After having finished memory programming, just press the NUMBER pad of the memory number you want to select. The oven will automatically start heating according to the pre-programmed cooking time and power level after a short delay (5 sec).

1. Make sure the oven is plugged into a properly earthed electrical outlet and ÔONÕ appears in the display window.

2. Open the door. The oven lamp will be turned on.

3. Put the food into a suitable container, place it in the centre of the oven and then close the door securely. Result: The oven lamp will go off.

4. Press NUMBER pad. Result: After 2 seconds, the selected memory program automatically starts heating.

Stopping the Cooking

You can stop cooking at any time so that you can: ¥ Check the food ¥ Turn the food over or stir it ¥ Leave it to stand

To stop the cooking;

* Temporarily: Open the door or press pad once.

Result: Cooking stops. To resume cooking, close the door and press again.

* Completely: Press the pad twice.

Result: The cooking settings are cancelled.

If you want to cancel any cooking settings before starting cooking, simply press CANCEL pad once.

Operating Instructions

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