Benutzeranleitung / Produktwartung SM-GA0005 des Produzenten Sanyo
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EM-W3000W Microwave Oven Service Manual REFERENCE NO. SM-GA0005.
1 INTRODUCTION This Microwave Oven Service Manual i s printed in a loose-l eaf format. Each p art is divided into se ctions relating to a general group of co mponents an d each section is su bdivided into various part s describing a p articular component or service procedure.
2 S S A A F F E E T T Y Y P P R R E E C C A A U U T T I I O O N N S S PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO A V OID POSSIBLE EXPOSURE TO EX CESSIVE MICROWA VE ENERG Y A. Do not operate or allow the oven to be operated with the door open.
3 E E M M - - W W 3 3 0 0 0 0 0 0 W W M M i i c c r r o o w w a a v v e e O O v v e e n n E E x x p p l l o o d d e e D D r r a a w w i i n n g g.
4 E E M M - - W W 3 3 0 0 0 0 0 0 W W M M i i c c r r o o w w a a v v e e O O v v e e n n P P a a r r t t s s / / C C o o m m p p o o n n e e n n t t s s L L i i s s t t P AR T NO.
5 1 1 . . T T H H E E H H E E A A T T I I N N G G P P R R I I N N C C I I P P L L E E O O F F M M I I C C R R O O W W A A V V E E Microwave is one kind of radio wave w hose wavele ngth is very short, frequency is very high. Therefore, it is called ultrahigh frequency electro magnetic wave.
6 120V K S tands for a constant E S tands for the microwave frequency . f S tands for the microwave frequency . tg δ S tands for loss angle tangent of the heated matter .
7 anode current I b (mA) a n o d e v o l t a g e e b ( k V ) m Fig.2-4 2 2 . . 2 2 M M I I C C R R O O W W A A V V E E G G E E N N E E R R A A T T E E R R . . Microwave generator is the heart of microwave oven. The quality of a mi crowave oven mostly depend s on the quality of the microwave generator .
8 door hook door release button pilot switch screw latch switch screw Fig.2-5（b ） door close d assistant lat ch switc h pilot swit ch main latch switch fuse S S S L E N 2 3 1 (a) Fig.2-5 transformer 4 S 5 S timer & power motor Fig.2-6 120V i tch w itch t ch holder latch swit ch holder latch switc h pilot swit ch door hook 2 2 .
9 those microwave oven which have the power control function. FIG .3-1 is the power control circuit diagram of brand microwave oven, WP700. This is a typical instance of conduction ratio control.
10 front door plate Fig.2-9 current- resistant constructu re oven door noise filte r 8). It is the most liable place where microwave leakage occurs. Especially , after a long time using, the microwave leakage would enlarge at the hinge and the hook. An yway , mechanic damage would also cause large amount of microwave leakage.
11 Fig.3–1 is the practical circuit diagram of a microwave oven. Its correspondin g working conditions are as follows: The door closed, SW1 and SW2 turned on, SW3 close d, power control relay has no power , R1, R2 is cut off. When cooking, touch the st arting switch to power the timer and the power relay .
12 six-angle screw oven hinge(up) Fig.4-2 door hook latch swit ch pilot swi tch latch swit ch holder latch swit ch holder latch switc h pilot swit ch door hook （a） Fig.4-3 （b） 4 4 . . 2 2 T T H H E E D D O O O O R R C C O O M M B B I I N N A A T T I I O O N N T o disassemble, 1.
13 FIG .4 – 1. 4. T ear off the adhesive prote ctive 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 doo r , tighten it wi th “+” – screws. After assembled, check whether the hook working in normal and whether the hinge (UP) is its position.
14 fan motor power supply cor d Fig.4-11 lead magnetron vertically , and also tighten the screws of the lampshade (FIG .4 - 8). 3. Plug in the two terminals of the magnet ron filament and the thermal cutout. 4 4 . . 5 5 T T H H E E T T R R A A N N S S F F O O R R M M E E R R .
15 earthing screw fuse housing power supply cord Fig.4-12 Fig.4-15 diode capacitor fan holder screw capacitor transformer H.V.fuse Fig.4-16 magnetron diode 1. Assemble the fan motor as FIG .4 – 14. Drip the gl ue 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.
16 Fig.4-17 Fig.4-18 1. Insert one end of the diode to one feet of the capacitor ’s connect piece. 2. Fix the diode with one screw (pay attention to the polarity of the diode, refer to FIG .4 - 16). 4 4 . . 9 9 T T H H E E T T U U R R N N T T A A B B L L E E C C O O M M B B I I N N A A T T I I O O M M .
17 front door pla latch switch hold screw Fig.4-21 Fig.4-22 light tough switch PC board control panel Fig.4-23 control pa nel light toug h switch door to check whether the door is flexible. If it does, back and front position of the holder should be adjusted.
18 Fig.5-1 glass tray 5 5 . . B B R R E E A A K K D D O O W W N N A A N N A A L L Y Y S S I I S S A A N N D D T T H H E E M M E E A A N N S S O O F F O O V V E E R R H H A A U U L L I I N N G G Before overhauling a microwave oven, you should judge the breakdo wn and the cause correctly , then you can repair it with correspondi ng ways.
19 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 exce ed 25mm per second, and the measuring direction should be the same with the outing direction of the microwave leakage (FIG .
20 5 5 . . 2 2 . . 5 5 E E X X A A M M I I N N E E T T H H E E S S T T A A R R T T I I N N G G A A N N D D T T H H E E 8 8 A A F F U U S S E E O O F F T T H H E E M M I I C C R R O O W W A A V V E E O O V V E E N N .
21 5 5 . . 3 3 R R E E P P A A I I R R I I N N G G M M E E T T H H O O D D O O F F S S E E V V E E R R A A L L B B R R E E A A K K D D O O W W N N 1. Repair when there occurred large amount s microwave leakage. There are many factor s which may cause microwave leaking.
22 the microwave leakage i s larger at those hole positi on of the window boa rd. The oven should be tu rned of f to inspect whether there are crack among them (fig.5 - 16) . If several holes formed a crack, it would enlarge the microwave leakage. If that is the case, it indicates the door has broken, and should be replaced with a new door .
23 (T o those 700W microwave oven) to make the ove n operatin g in normal. When the bell of the timer rin gs, 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 .
24 7 7 . . C C O O M M M M O O N N B B R R E E A A K K D D O O W W N N O O F F M M I I C C R R O O W W A A V V E E O O V V E E N N A A N N D D M M E E A A N N S S O O F F R R E E P P A A I I R R I I N N G G PHENOMENON CAUSE REP AIRING MEANS 1.
25 9. The door can’t open After long time usi ng, the wear and the rust –eaten enlarged the gap of the door shaft and the shaft hole, thus cau se the door crooked. The door hook broken. Adjust the hinge to rectify the position of the door . Change the hook.
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