Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for Sanyo SM-GA0005
Summary of Contents for Sanyo SM-GA0005
-
Page 1: Microwave Oven
EM-W3000W Microwave Oven Service Manual REFERENCE NO. SM-GA0005... -
Page 2: Table Of Contents
This Microwave Oven Service Manual is printed in a loose-leaf format. Each part is divided into sections relating to a general group of components and each section is subdivided into various parts describing a particular component or service procedure. The subdividing of the subject matter plus the loose leaf form will facilitate the updating of the manual as new or revised components and service procedures are introduced. -
Page 3: Safety Precautions
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE 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. -
Page 5: Em-W3000W Microwave Oven Parts /Components List
PART NO. PART CODE NO GA-1000AP30P01 GA-1000AP30P02 GA-1000AP30P03 Door release button GA-1000AP30P04 GA-1000AP30P05 GA-1000AP30P06 GA-1000AP30P07 GA-1000AP30P08 GA-1000AP30P09 GA-1000AP30P10 Bottom enclosure GA-1000AP30P11 GA-1000AP30P12 Microswitch mounting GA-1000AP30P13 GA-1000AP30P14 GA-1000AP30P15 Shock proof rubber GA-1000AP30P16 GA-1000AP30P17 GA-1000AP30P18 GA-1000AP30P19 GA-1000AP30P20 GA-1000AP30P21 H.V.capacitor holder GA-1000AP30P22 GA-1000AP30P23 GA-1000AP30P24 GA-1000AP30P25 COMPONENT NO. -
Page 6: The Heating Principle Of Microwave
Microwave is one kind of radio wave whose wavelength is very short, frequency is very high. Therefore, it is called ultrahigh frequency electromagnetic wave. Microwave can heat food mainly result in the mutual affect of the food in the microwave field and the microwave field itself. Under the affect of microwave field, the thermal effect mechanism produced from the mutual affect of the microwave and the food includes two aspects. -
Page 7: The Structure And Working Principle Of Microwwave Oven
At present, home use microwave oven adopt this high voltage rectifying circuit as shown at diagram 2-2.The circuit is a single phase, semi-wave, double voltage rectifying circuit. The circuit has only a high voltage capacitor, a high voltage diode, a magnetic leakage transformer besides the magnetron, is very simple. -
Page 8: Microwave Generater
Microwave generator is the heart of microwave oven. The quality of a microwave oven mostly depends on the quality of the microwave generator. A microwave generator is mainly composed of magnetron and its power supply circuit, FIG.2-3 is the typical circuit diagram of the present used microwave oven’s generator. The power supply circuit is composed of rectifying circuit and filament circuit. - Page 9 (S3) which is still at conducted condition, the monitor switch would immediately make the 120V voltage short-circuited and blow up the fuse, and will never let the microwave oven working when the door is open. From this we can understand the function of the interlock switch is when the door is unclosed, the oven wouldn’t work, when the door is...
- Page 10 30 seconds. When power select switch is set at “HIGH”, S5 is always conducted, the output of the microwave oven is 700W(full power) when the power select switch is set at defrost position, S5 would conduct for 14.4 seconds, and cut off for 15.5 seconds, and the average output of the oven is 336W.
-
Page 11: Typical Circuit Analyasis Of Microwave Oven
(include high subharmonic) have been much improved. We have introduced the structure and the working principle of the microwave oven previously. We shall analyze the complete set circuit of the microwave oven link with the practical circuit at this chapter. -
Page 12: How To Assemble And Disassemble Microwave Oven Components
Circuit diagram of computer controlled microwave ovens: Circuit diagram for mechanical controlled microwave ovens: In the following pages, we will introduce the ways in which the various parts of a typical microwave oven can be disassembled and assembled. To disassemble the cabinet Pull out the power plug. -
Page 13: The Door Combination
To disassemble, Pull out the power plug. Take off the cabinet. Loosen the two six –angle screws of left hinge (up) with a socket wrench (FIG.4 - 2). Push the door release button to have the hook out (FIG.4 -3). Pull the hinge with the door out of the oven together, and take off the washer of the hinge (low) shaft (FIG.4 - 2). -
Page 14: The Control Panel And The Door Release Mechanism
FIG.4 – 1. Tear off the adhesive protective paper of the lining and stick it on the door as FIG.4 – 1, slip the hook on the doorframe, and fix the doorframe on the door, tighten it with “+” – screws. After assembled, check whether the hook working in normal and whether the hinge (UP) is its position. -
Page 15: The Transformer
magnetron vertically, and also tighten the screws of the lampshade (FIG.4 - 8). Plug in the two terminals of the magnetron filament and the thermal cutout. Firstly, do as the 1,2,3, steps at Ⅲ of this part. Dismantling steps for the transformer: (as FIG.4 -9). Pull out all the terminal of the transformer. -
Page 16: The Capacitor
Assemble the fan motor as FIG.4 – 14. Drip the glue on the “★” place of the fan motor shaft, and fix the fan on the motor, make sure it must be fixed to the bottom of the shaft. Attention: The fan motor shaft should not be curved, the fan should have no abnormal stick up. -
Page 17: The Turntable Combinatiom
Firstly, do as the 1, 2, 3, stops of Ⅲ of this part. To disassemble, Turn the microwave oven over (FIG. 4- 17). Take off the two screws which fix the middle base board with a “+” – screwdriver and take off the middle cover (FIG.4 - 18). -
Page 18: The Control Panel Of A Typical Microwave Oven
door to check whether the door is flexible. If it does, back and front position of the holder should be adjusted. Provided the up hook is loose, the door should be pushed more closely to the oven, and pull the holder inside closely after loosen the screw which fix the holder, then, tighten the screw and check whether it is still loose. -
Page 19: Breakdown Analysis And The Means Of Overhauling
Before overhauling a microwave oven, you should judge the breakdown and the cause correctly, then you can repair it with corresponding ways. The overhauling must be proceed in order, any hasty conclusion is not recommendable, otherwise over-working would be done when repair. The microwave oven may occur compound breakdown due to all kinds of different reasons, thus, when overhaul, they all should be taken into consideration. - Page 20 speed of the probe should not exceed 25mm per second, and the measuring direction should be the same with the outing direction of the probe should not exceed 25mm per second, and the measuring direction should be the same with the outing direction of the microwave leakage (FIG.5 - 2)..
- Page 21 Pull out the power plug, take off the cabinet, discharge the capacitor, measure the resistance value of the primary winding and the secondary winding of the transformer with an avometer (FIG.5 – 10 and FIG.5 - 9). The resistance value of the primary winding should be about 2.2 ohms, the secondary winding should be about 130 ohms.
-
Page 22: Repairing Method Of Several Breakdown
Before repairing, check whether the above listed point are existed, if not, can you start the microwave oven. Place a graduate of about 275ml water at the middle of the glass tray, close the door, time set at 3 minutes, power at high, make the oven operating in normal. Rectify the microwave leakage measure, measure the amount of the microwave leakage around the oven with its probe. -
Page 23: The Characters Requirements Of Microwave After It Has Been Repaired
After being repaired, the microwave oven should have a 30 minutes trial operation. It can be used only when it has been demonstrated that it is in good conditions of safety, heating and defrosting. The oven must have the... -
Page 24: Critical Parts Servicing
(To those 700W microwave oven) to make the oven operating in normal. When the bell of the timer rings, open the oven door, the water should have boiled. If it have not been boiled yet, but is very hot, check whether the voltage is less than 120V. -
Page 25: Common Breakdown Of Microwave Oven And Means Of Repairing
PHENOMENON When starting oven, the lamp is not on, the turntable tray can’t rotate and the food can’t be heated 2.When starting oven, the lamp is on, the turntable rotating, the fan cycling but the food can’t be heated. food heated, but the lamp is not on food... -
Page 26: Specifications
After long time using, the wear and the rust –eaten enlarged the gap of the door shaft and the shaft hole, thus cause the door 9. The door can’t open crooked. The door hook broken. door release Worn out and aged after long time button fall off operating The earthing insulation resistance of all the...