Qhov tsis txaus ntawm cov khoom siv hluav taws xob thiab cov nqi nce. Nws muab sijhawm rau cov neeg cuav.
Niaj hnub no, cov khoom siv hluav taws xob cuav tau dhau los ua neeg nyiam. Muaj ntau cov khoom cuav xws li capacitors, resistors, inductors, MOS raj, thiab ib leeg-chip computers tau ncig hauv khw. Ntxiv rau kev nrhiav qee tus neeg ua haujlwm tsis tu ncua los yuav ntau li ntau tau, engineers thiab buyers yuav tsum qhib lawv lub qhov muag thiab kawm paub txog cov fakes!
Txawm li cas los xij, yog tias koj xav paub qhov txawv ntawm cov khoom siv hluav taws xob tiag thiab cuav, koj yuav tsum xub nkag siab qhov txawv ntawm cov khoom qub thiab cov tshiab.
1. Dab tsi yog cov khoom lag luam qub qub?
Cov khoom lag luam tshiab yog cov lus qub ntawm lub Hoobkas thawj, cov khoom ntim thawj, cov thawj LABLE (cov qauv ua tiav, batch naj npawb, hom, LOT tooj (IC ntim khoom sib dhos kab thiab tshuab siv), pob kom muaj nuj nqis, code (tau Yuav Tshawb xyuas ntawm nws lub vev xaib), barcodes (feem ntau yog rau kev tiv thaiv cuav).
Tag nrho cov kev txwv yog tsim nyog los ntawm cov chaw tsim khoom, suav nrog cov khoom qub hauv tsev. Qhov zoo ntawm cov khoom no yog zoo heev, batch tooj yog uniform, thiab cov tsos yog zoo nkauj. Cov neeg siv khoom txaus siab txais nws, tab sis tus nqi kuj yog siab heev.
Cov khoom qub qub yog thawj cov khoom ntim ncaj qha los ntawm lub Hoobkas thawj. Cov pob thawj yuav tau qhib los yog tsis muaj pob thawj, tab sis nws tseem yog cov khoom qub qub.
Shoddy bulk tshiab (piv txwv li cov khoom tsis raug)
Sub-chips yog cov chips uas raug tshem tawm los ntawm IC los ua ke kab vim kev ua haujlwm sab hauv thiab lwm yam teeb meem, tab sis tsis tau dhau qhov kev tsim qauv tsim qauv. Los yog vim kev ntim khoom tsis raug, cov tsos ntawm cov yeeb yaj kiab raug puas, thiab cov nti kuj raug tshem tawm.
● Cov yeeb yaj kiab tawm los ntawm kab sib dhos. Nws yog cov yeeb yaj kiab uas tau txiav tawm thaum lub sijhawm kuaj xyuas los ntawm cov chaw tsim khoom. Cov yeeb yaj kiab tsis tau txhais hais tias yuav tsum muaj teeb meem zoo, tab sis qee qhov tsis muaj qhov yuam kev loj heev.
Vim tias cov tuam txhab tsim khoom feem ntau muaj cov kev xav tau siab rau qhov tseeb ntawm cov yeeb yaj kiab, xws li voltage thiab tam sim no, thiab qhov kev tso cai yuam kev yog nyob rau hauv ntxiv lossis rho tawm 0.01, ces thaum tus qauv zaj duab xis yuav tsum yog 1.00, 1.01 thiab 0.99 yog tag nrho cov khoom tiag, thiab 0.98. los yog 1.02 yog cov khoom tsis raug.
Cov yeeb yaj kiab no tau raug xaiv thiab dhau los ua cov yeeb yaj kiab tshiab tawg. Ib yam li ntawd, vim yog qhov tsis muaj zog ntawm cov yeeb yaj kiab, cov yeeb yaj kiab qub yuav ua rau muaj kev hloov pauv me me ntawm qhov kev ua yuam kev thaum lub sijhawm ua haujlwm. Qhov no yog vim li cas qee zaum cov khoom qub, qee cov neeg siv khoom siv, thiab qee cov neeg siv khoom siv. .
● Nyob rau hauv tus txheej txheem ntawm kev soj ntsuam zoo, vim hais tias cov kab sib dhos dhau los ntawm lub computer thaum lub sij hawm soj ntsuam los ntawm phau ntawv ntxiv ntawm lub computer, tej zaum cov zaj duab xis yog tsis tshua muaj teeb meem, tab sis thaum nws yog daig, cov neeg ua hauj lwm xav tua ib txhiab los ntawm yuam kev tshaj. tso nws. Tom qab ua yeeb yaj kiab tsis zoo, yog li koj plam ntau, ces cov no dhau los ua kev sib cais tshiab.
2. Dab tsi yog cov khoom thauj tshiab ntau?
Sanxin tuaj yeem muab faib ua cov xwm txheej hauv qab no raws li kev ua lag luam:
★ Hauv qhov tseeb ntawm cov khoom loj (piv txwv li cov khoom qub yam tsis muaj cov ntim khoom qub)
● Cov neeg siv khoom xav tau tsawg dua ib pob tag nrho. Vim yog tus nqi tsav, tus neeg muag khoom disassembles thawj pob tag nrho thiab muag ib feem ntawm cov nti ntawm tus nqi siab, thiab qhov seem ntawm cov nti tsis muaj cov pob qub.
● Vim yog vim li cas kev thauj mus los, tus neeg muag khoom disassembles cov khoom ntim khoom qub kom yooj yim rau kev thauj mus los. Cov khoom qub zoo li Hong Kong yuav tsum tau xa mus rau Shenzhen thiab lwm qhov chaw. Txhawm rau nkag mus rau kev lis kev cai thiab txo cov nqi se, cov ntim khoom qub raug tshem tawm thiab ntau tus neeg raug coj mus rau hauv kev lis kev cai.
● Cov khoom tshiab thiab qub: Feem ntau ntawm cov khoom no yog cov uas tau khaws cia rau lub sijhawm ntev thiab muaj qhov tsis zoo. Lawv tsuas yog siv tau rau kev pov tseg ntau.
● Tseem muaj qee qhov chaw ntim khoom. Thaum muaj coob tus wafers raug xa mus rau lub Hoobkas ntim khoom ntim, tom qab ua tiav ntawm IC tsim chav tsev yuav tsis tuaj yeem tau txais tag nrho cov ntim wafers vim muaj teeb meem nyiaj txiag, ces qhov no ntawm lub Hoobkas ntim yuav muag nws tus kheej. , vim tsis yog Lawv yuav tsum tau kos lawv tus kheej cov ntawv thiab yuav tsis ua cov ntim kom nce nqi, yog li lawv yuav muag lawv ntau.
● Vim muaj teeb meem kev tswj hwm ntawm lub Hoobkas ntim khoom, cov yeeb yaj kiab uas nws cov neeg ua haujlwm thauj khoom tawm ntawm lub tuam txhab los ntawm cov kab txawv txawv, muag thiab yuav cov yeeb yaj kiab, tau ntws mus rau hauv lub tebchaws. Cov yeeb yaj kiab zoo li no tsis muaj kev ntim khoom sab nraud vim tias tsis muaj txheej txheem ntim khoom zaum kawg, tab sis tus nqi yog qhov zoo dua thiab qee zaum zoo dua tus nqi ntawm lub koom haum hauv tebchaws.
★ Cov khoom cuav (piv txwv li cov khoom siv kho dua tshiab)
Cov khoom siv refurbished yog refurbished los yog disassembled qhov chaw. Lawv tau ua tiav thiab rov ua dua tshiab, yog li cov neeg hauv kev lag luam feem ntau hu lawv cov khoom kho dua tshiab.
● Qee qhov tshwm sim raug puas tsuaj, tab sis qhov kev puas tsuaj saum npoo tsis loj heev, thiab cov yeeb yaj kiab uas tsis yooj yim rau txheej txheem tseem tuaj yeem raug muag raws li cov yeeb yaj kiab tshiab tom qab kho dua tshiab.
● Ceev faj txog cov yeeb yaj kiab thib ob uas zoo nkauj zoo nkauj. Cov yeeb yaj kiab no feem ntau yog cov yeeb yaj kiab uas muaj teeb meem sab hauv. Cov neeg yuav khoom ntawm cov yeeb yaj kiab no feem ntau yuav tsum ceev faj.
● Kev kho dua tshiab ntawm cov yeeb yaj kiab qub feem ntau yog los ntawm kev rov ua cov yeeb yaj kiab qub, xws li kev sib tsoo, ntxuav, rub cov taw, plating taw, txuas taw, sib tsoo cov cim, ntaus ntawv, thiab lwm yam. Cov tsos ntawm zaj duab xis yog ua tiav los ua kom cov yeeb yaj kiab zoo nkauj dua.
Feem ntau cov khib nyiab txawv teb chaws, uas yog, cov khoom siv hauv tsev txawv teb chaws, khoos phis tawj, routers thiab lwm yam khoom siv hluav taws xob tau ua tiav rau cov chaw khaws khib nyiab hauv zos. Cov khib nyiab no raug thauj mus rau Hong Kong, Guangdong, Taiwan, Zhejiang, thiab Chaoshan cheeb tsam kom rov ua dua tshiab ntawm tus nqi qis heev.
Kev kho dua tshiab ntawm cov cim qub tsuas yog ua kom cov tsos ntawm cov yeeb yaj kiab ua kom cov yeeb yaj kiab zoo nkauj dua. Cov khoom zoo li no yog qhov zoo dua thiab pheej yig dua, feem ntau yog ib nrab ntawm tus nqi net lossis pheej yig dua.
● Cov khoom siv, disassemble qhov chaw. Cov khoom tau raug siv, thiab tshem tawm ntawm lub rooj tsavxwm los ntawm cov cua kub los yog kib. Ob txoj hauv kev rau kev rhuav tshem cov yeeb yaj kiab qub:
Cov txheej txheem cua kub, txoj kev no yog ib txoj kev tsis tu ncua, siv rau kev huv thiab huv si, tshwj xeeb tshaj yog muaj txiaj ntsig SMD boards.
"Frying" txoj kev, qhov no yog qhov tseeb. Siv cov roj ntxhia hauv siab kom "kib". Cov laus lossis cov khib nyiab khib nyiab feem ntau siv cov qauv no.
Cov khib nyiab tsim tawm hauv cov txheej txheem ntawm kev sib cais thiab rov tsim cov yeeb yaj kiab qub yuav ua rau muaj kuab paug rau ib puag ncig yog tias nws tsis raug kho kom raug, thiab tus nqi ntawm "tsim pov tseg" yuav siab dua tag nrho cov nyiaj tau los rov qab los.
Yog li ntawd, qee lub tuam txhab hauv cov teb chaws tsim kho tau zoo dua siv nyiaj thiab xa cov khoom xa tuaj "xa" e-khoom pov tseg rau Tuam Tshoj thiab qee lub tebchaws hauv South Asia dua li pov tseg lawv tus kheej. Tus nqi sib txawv ntawm cov chips qub thiab tshiab yog deb ntawm kev rov qab los ntawm kev poob ntawm ib puag ncig cov pa phem!
Ntau lub lag luam hauv kev lag luam hluav taws xob feem ntau piav qhia txog cov khoom siv kho dua tshiab raws li cov khoom tshiab, uas yuav tsum ua kom lawv lub qhov muag qhib thiab tso siab rau qee qhov kev txawj me me kom paub qhov txawv ntawm lawv.
3. Qhov txawv ntawm cov khoom tshiab thiab cov khoom siv kho dua tshiab
Qhov zoo ntawm cov khoom loj tiag tiag tuaj yeem paub tseeb.
Cov khoom puas yuav txawv ntawm cov khoom qub nyob rau hauv cov nqe lus ntawm seem seem thiab stability. Vim tias ob hom khoom no yog cov tshiab, nws yog qhov nyuaj heev kom paub qhov txawv.
Cov khoom siv kho dua tshiab yog qhov teeb meem ntau dua. Tej zaum nws yuav muag dev nqaij. Lawv zoo ib yam, tab sis qhov tseeb, lawv muaj cov haujlwm sib txawv kiag li.
Yog li ntawd, nws yog qhov zoo tshaj plaws rau koj kom tsis txhob muaj cov khoom lag luam tshiab, tshwj tsis yog tias koj yuav los ntawm qee qhov kev lees paub.