shunde Md Microwave Oven E8528P-B Microwave Oven User Manual Users manual

shunde Md Microwave Oven Manufactory Co., ltd. Microwave Oven Users manual

Users manual

INSTRU~TIONSSAFETYMPORTANTservice facilily for examina~on, repair or replacement.Do not attempt to service or repc.ir this appliance.10. Do not cover or block any openings on theappliance. Do not store items on top of microwaveoven ii there are louvers on top of oven.11. Do not store this appiiance outdoors. Do notusa this product near water-for example, neara kitchen sink, in G wet basement, or near aswimming pool, and the like.i 2. Do not immerse cord or plug in water.i 3. Keep cord away from heated surfaces..14. 00 not Jet cord hang over edge of table or counter.15. When cleanina surlaces of door and oven thatcome togethe; on dosing the door, use only miid,nonabrasive soaps or detergents applied with asponge or soft cloth.16. To reduce the risk oj fire in the oven cavity:a. Do not overcook food. espe~ially starc.~yitems such as potatoes and fatty items suchas bacon. Carefully attend appliance ii paper,plastic, or other combustible materials are.placed inside the oven to facilitate cooking.b. Remove wire twist.Ues from paper or plasticbag before placing bag in oven.c. If materials inside the oven should ignite, keepoven door closed, turn oven oft, and disconneclthe power cord, or shut off power at the fuse orcirC'uit breaker panel.d. Do not use the cavity for storage purposes.Do nolleave paper products: cooking ulensils,or food in Ihe cavily when not in use.e. 00 nol put metal inside the oven, except asspe~ifica"y descnbed In the manual orcookbook if supplied \vith this oven.When using electrical appliances. basic safetyprecautions should be follo"/ed. incluo1ng the following:VvARNING- To reduce the risk of bums. electricalshock. firs. injury iO persons or exposure to excessivemic:-ow2ve energy:,. READ ALL. THE INSTRUCTIONS SEFORE USINGTHE APPLIANCE:.2. Read and iollow the specific "?rero...autions to avoidpossible exposure to excessive mic.-owave energy"found above.3. Tnis appliance must be grounded and properlypolarized. Connect only to a propeliy grounded andp::>iarize-:i ouUsl Sse -G(ouncing Ins\rlJC:jons- on page 3.4. Install or locate this appiiance only in ac:ordancev/ith the installation instructions described in thismanual.5. Some products such as ,,/hole eggs and sealedcontainers, such as closed glass jars. may explodeand shouid not be heated in this oven.6. Vse this appliance only for its intended use asdescribed in the manual. 00 not use corrosivechemicals or vapors in this appliance. This type ofoven is specifically designed to heat, C:IOk, dry, ordefrost food. It is not desioned for industrial,laboratory, or commercial-use. It is intended forhome use only. Do not use for drying ctothes,linens.newspaper. or similar non-load type items.7. Make sure thaI all persons using this appliance, 'especially chiidren, are closely supervised andproperly instructed on how to use this appliance.I 8. Do not operate this appliance ij it h2S a damagedc:>rd or plug. ii i: is nOI working propeny, or if it hasbeen oamagcd Or oropped.9. This appliance should be serviced onl)' by qualifiedzervic~ per:oonne!. Conlac; the nearest authoriz,erJA. Do not attempllo operate this oven with C. Do not operate the oven if it is damaged.the door open since open-door operation It is par1icularly impor1an~that the oven doorcan result in harmful exposure to microwave close properly and that there is no damage toenergy. It is important nol to deieat or the (1) Door (bent), (2) hinges and latchestamper "vilh lhe safely interlocks. (broken or loosened), (3) door scals andi . sealing surfaces.i 8. Do nol place any obJecl belweenoven front face and the door or allow D. The oven should not be adjusted or repairedsoil or cleaner residue to accumulate on by anyone except properly qualified serVicesealing suriaces. personnel.
TABLE OF CONTENTSIntroduction and Safety precautions001234512345I ntrod uctionSafety PrecautionsExploded ViewsSchematic Diag ramsParts List1.0 Heating Principle of Microwave 6Trou bleshooting Proced ures2.0 7Common breakdown and means of repairing3.0 12Critical Parts Servicing 13important things to do prior to critical parts servicinginterlock assembly replacement and adjustmentdoor and hinge replacement and adjustmentmagnetron replace ment13131313123414Safety checks and tests after servicing5.0123141415constructional checksinsulation resistance testmicrowave leakage test
This Microwave Oven Service Manual is printed in a loose leaf format. Each part isdivided into sections relating to a general group of components and each section issubdivided into various parts describing a particular component or service procedure.The subdividing of the subject matter plus the loose leaffonn Will facilitate Ute updatingof the manual as new or revised components and service procedures are introduced.Each page of this service manual will be identified in the lower right hand comer and asnew or revised pages are published it will be easy to keep the manual up to date byfollowing the filing instructions on the cover letter.This Service Manual is a valuable service tool and .care should be taken to keep it up todate by prompt and proper filling of subsequent pages as they are issued.
SAFETY PRECAUTIONS!PRECAUTIO,NS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOIDIPOSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY:IA. 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 activatingthe 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.C. Before turning on microwave power for any service test or inspection withinthe microwave generating compartments, check the magnetron, wave guideor transmission line, and cavity for proper alignment, integrity, and connections.D. Any defective or misadjusted components in the interlock, monitor, door sealand microwave generation and transmission systems shall be repaired. replaced.or adjusted by procedures described in this manual before the oven is released tothe owner.E. A microwave leakage check to verify compliance with the Federal performancestandard should be performed on each oven prior to release to the owner.F. Operate the oven from a properly grounded AC outlet capable of supplying 120volts at 15 amperes.THIS MANUAl, AS WELL AS THE INFORMATION CONTAINED IN IT, IS TO BE USED ONLY BYAN AUTHORIZED SERVICE TECHNICIAN FAMILIAR WITH AND KNOWLEDGEABLE OF;PROPER SAFETY AND SERVICING PROCEDURES AND POSSESSING HIGH QUALITY TESTEQUIPMENT ASSOCIATED WITH MICROWAVE AND ELECTRICAL APPLIANCE REPAIR.ALL INDIVIDUALS WHO ATTEMPT REPAIRS BY IMPROPER MEANS OR ADJUSTMENT,SUBJECT THEMSELVES AND OTHERS TO THE RISK OF SERIOUS OR FATAL INJURY.2
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THE HEATING PRINCIPLE OF MICROWAVEMicrowave Is one kind of radio wave wlKlSe wavelenctll is very shurt. frequency is very hiBh. Therefore. It Is called ultrahi~hfrequency electromagnetic waye. Microwave can hcat fc)()(1 mainly result in the Inutual afrect or the rood in the microwave fieldand the microwave field itself.under the .ffect of microwave field. the tl\C~.1 effect mechanism produced from tile mutual affect or the microwave and thef~ Includes two aspects: One is Dielectric loss or (lCllar molecule. the olher is clJOducti.e Ius.. or ion.Usually. f~ is constitute of fH"~anisnl( plant and aninlall. The QfJ:inism is foroled by all kinds of poiar ~ater 111OIecule, polarprotein molecule, and all S()rts of salt ioll. Tile centcr uf i=rayity or Ibe positive and neptiye charge in the molecule is not coin-cide. In normal condition. the tn~cculc Is in irrCl~llar IN"der due to its thermal action, thlls the (ood do not appear JX)larily.(r:IG.l - la). Undcr thc actiOtI or outcr clectric ficld. the (lClSitive end or the lJ()Iar molecule trrnd to the negative electricfield, tbe negativc end or ~1ar Itloleculc trend to the pusitive clcctric field. and sonlcwhat arraDle In order througl' the dlrec-tim or the electric field( FJ(j.1 - Ic). l"Ilis phenolneCtfl11 usually be called MTORQUE POLARITY". WllCn the. outcr elcctri~rield apply for tile op~itc polarity, thc polar D,olecule Illcn arrange an OI)po5ile dircclion ()r"dcr accordlnlly( FIG. J -Ib). IfIlle direction of the outer electric field changed ref)Catcclly. the polar molec"le WCKlld ref)Caledly sway accordingly. During theswa,iRl, it is undentalKllIIg Ihnt the pular muleculC! ,vlII)ld prUl.luce heat due to Sllnle~hat similar fricliun .0.00& Ihem. When- 1+I i - J_-::-II -(ct~-J (b)Fi~J - I, lhe electric field is applied ror ultrahigh rrcquent lulcruwave neld rrom tile outside. its direction would change tens hilUm1times per second. so do the mol~ule. This kind of nllllccuic ~waylng producing: sinlilar frictiooal heat fnJRI the interfercnccQnd block of the action slrenst" anionS the molecule, and,changed to mocrnscopic nalcmw.ve heating. Microwave heating nfJtunly concerned thc nature or the nlatter itselr. but Dls" ck1SCdly connected with thc clcctric field strength and rrequency. WhcnChe rrequency Is low, thc nKJlecule swaying rate and the acute degree or lhe mutual fricl!lln am~ the n1O1«ute is low, andwwld pnMiu~c much heat. When tile frequency is too Iligh. 115 thc swin, or tl1e pular looleculc is with rotaCing inertia. it madethe swinK do not in line wiCIJ the changin~ ..h,lhol or lhc: electric field because or tate frlciiUt", drag. thus. actually lowed lile po-lar molecule swaying spced. l"he frictiOfI d.-aging delle\: L, concerning abouC the magnelectric wave frequency. (MJlar moleculeshape, and tile matter' s sti~ky degree, To dirfcrentJJlaCICr' s nloleculc. there are dlfferenC .cpecial rrcquency zone, Those ahoabsorb microwave enctgy rrom tlle.~e zone are nwst callable to tum microwave ener~y to heat energy-Apart from the above said acCjon. there Is another actiun which is electric ion under tbe action of microwave field. act nercelyaccocnpanied with the aeccleration of electric field. Tllc positive iOfI transfer to the negative pJlarity or the field while the 11eg-ati~e Ion do opposite, Accompaninl with tile clt8nBln~ electric field. the electric Ion chaRging accordingly. During the trans.fcrlnl. beat produced with tile crash anM1ng the ion. Thi5 kind of actiwa take the nlain erfcct to Ihose mlcrowaye heating ofhigh lalt molecule.No matter It II the pol.r molecule Iw8ylnl or the loa ttansfering. they bot It are turninl the microwave encrJY whicb the Kat.ina ...atter lOt frOln the IIllCfOWllye neld to heat ene~y. I":ronl the analasl- of thellrY, we e8n draw .uch 8 cuncluaion th8t thepower which a 'Init of volume nlatte.. absorbed from tile Inicrowave field a.~ the followiol foftlula:Pa - KE fErt~aPa'Stands for the power tile heated matter absorbed fr(M.. tile loicrowave field.K St_. for a canstantE Staad fcw microwave field strengthr Stands for the ml~rvwaYe frequency.la~ ~f.ftd. 1- r_- ___I. -, ~L- L__&_.J --,.--~

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