Yuav ua li cas los xyuas qhov voltage tso zis ntawm USB chaw nres nkoj?

Ua ntej, nkag siab txog cov yam ntxwv hluav taws xob yooj yim ntawm USB chaw nres nkoj yog qhov kev paub tseem ceeb ua ntej. Feem ntau cov chaw nres nkoj USB muab 5 volts ntawm qhov ncaj qha tam sim no, tab sis muaj kev zam, xws li USB them downstream chaw nres nkoj (CDP) uas tuaj yeem muab hluav taws xob ntau dua thiab tam sim no. Tus qauv USB 2.0 chaw nres nkoj tuaj yeem muab tau txog 500 milliamperes (mA) ntawm tam sim no, thaum USB 3.0 chaw nres nkoj tuaj yeem muab tau txog 900 milliamperes. Tsis tas li ntawd, qee qhov tshwj xeeb tsim los them cov chaw nres nkoj, xws li Power Delivery (PD) chaw nres nkoj, tuaj yeem muab tau txog li 100 watts ntawm lub zog tso zis.

Ua ntej ua qhov ntsuas hluav taws xob, thov npaj cov cuab yeej thiab khoom siv hauv qab no:

Digital Multimeter (DMM): siv los ntsuas qhov voltage thiab tam sim no.
USB xeem cable lossis connector: Yog tias tsim nyog, siv los txuas DMM rau USB chaw nres nkoj.
USB ntaus ntawv: siv los ua lub nra rau simulate qhov kev tso tawm hluav taws xob ua haujlwm raws li kev ua haujlwm tiag tiag.

Cov hauv qab no yog cov kauj ruam tshwj xeeb los kuaj xyuas qhov hluav taws xob tawm ntawm USB chaw nres nkoj:

1. Kev npaj kev nyab xeeb

Xyuas kom tseeb tias qhov ntsuas tau ua nyob rau hauv qhov chaw ua haujlwm qhuav thiab ruaj khov, thiab tsis txhob siv cov khoom siv hluav taws xob hauv qhov chaw ntub dej lossis cov nplaim taws.
Tshem tawm tag nrho cov kev sib txuas hluav taws xob tsis tsim nyog los tiv thaiv kev sib tsoo luv luv lossis overloads.

2. Teeb lub multimeter

Tig lub digital multimeter thiab tig lub pob qhov rooj mus rau DC Voltage Measurement txoj haujlwm.
Yog hais tias lub multimeter muaj qhov tseeb RMS muaj nuj nqi, xaiv hom no kom raug nyeem cov qauv voltage waveforms.

3. Kev ntsuas kev sib txuas

Txuas cov hlau lead liab (zoo) ntawm lub multimeter mus rau qhov zoo (feem ntau yog liab hlau) ntawm USB chaw nres nkoj, thiab cov hlau lead dub (tsis zoo) rau qhov tsis zoo (feem ntau yog xim dub lossis dawb hlau) ntawm USB chaw nres nkoj.
Xyuas kom meej tias qhov kev sib txuas ruaj khov thiab tsis xoob kom tsis txhob ntsuas qhov yuam kev.

4. Kev ntsuas hluav taws xob zoo li qub

Sau cov nqi hluav taws xob zoo li qub ntawm USB chaw nres nkoj yam tsis tau txuas nrog USB li. Qhov no yuav tsum yog tus nqi ze li 5 volts.
Yog hais tias qhov hluav taws xob zoo li qub deviates deb ntawm 5 volts, nws yuav yog ib qho teeb meem ntawm kev siv fais fab lossis kev puas tsuaj rau qhov chaw nres nkoj USB.

5. Load xeem

Ntxig qhov paub siv hluav taws xob siv USB rau hauv qhov chaw nres nkoj USB, xws li tus qauv USB tsav lossis xov tooj.
Saib thiab sau cov kev hloov pauv ntawm qhov chaw nres nkoj USB thaum lub sijhawm ua haujlwm. Raws li ib txwm muaj, yuav muaj qhov txo qis hauv qhov voltage, tab sis nws yuav tsum tsis pub tshaj 10%.

6. Kev ntsuas tam sim no (yog tias xav tau)

Yog tias koj xav tias qhov chaw nres nkoj USB tsis tuaj yeem muab tam sim no txaus, koj tuaj yeem siv qhov ntsuas tam sim no ntawm multimeter los kuaj.
Txuas lub multimeter nyob rau hauv series hauv Circuit Court, ceev faj tsis txhob luv luv Circuit Court tej terminals, thiab tom qab ntawd soj ntsuam cov kev hloov nyob rau hauv tam sim no thaum txuas lub USB ntaus ntawv.

7. Kev txheeb xyuas qhov tshwm sim

Raws li kev ntsuas ntsuas, txiav txim siab seb qhov tso zis hluav taws xob ntawm USB chaw nres nkoj puas yog qhov qub. Yog tias qhov hluav taws xob qis dhau los yog siab dhau, nws yuav ua rau cov khoom siv tsis raug lossis puas.
Yog tias pom muaj qhov txawv txav, sim hloov qhov chaw nres nkoj USB lossis hu rau cov kws tshaj lij cov neeg ua haujlwm rau kev tshuaj xyuas.

8. Kev daws teeb meem

Yog tias nws tau txiav txim siab tias muaj teeb meem nrog lub chaw nres nkoj USB, koj tuaj yeem sim rov pib dua lossis hloov kho lub khoos phis tawj lub kaw lus software txhawm rau xyuas seb tus tsav tsheb yog qhov tseeb.
Xyuas seb lub cev qauv ntawm USB chaw nres nkoj puas los yog corroded, uas yuav cuam tshuam rau nws cov kev ua tau zoo.

Hauv cov ntsiab lus, txheeb xyuas qhov hluav taws xob tso zis ntawm USB chaw nres nkoj yog ib qho yooj yim tab sis cov txheej txheem tseem ceeb heev. Los ntawm cov kauj ruam saum toj no, cov neeg siv tuaj yeem xyuas kom meej tias lawv cov khoom siv tau ruaj ntseg txuas rau USB chaw nres nkoj thiab tau txais lub zog tsim nyog. Kev soj ntsuam tas li tuaj yeem pab tiv thaiv cov khoom siv puas tsuaj thiab ua kom cov ntaub ntawv muaj kev ncaj ncees thiab cov khoom ruaj khov. Nrog rau kev txhim kho ntawm USB thev naus laus zis, tej zaum yuav muaj ntau qhov voltage thiab tam sim no specifications nyob rau hauv lub neej yav tom ntej, tab sis cov txheej txheem tshawb nrhiav thiab kev ceev faj yuav nyob twj ywm tsis hloov. Yog li, kev paub txog yuav ua li cas txhawm rau txheeb xyuas qhov hluav taws xob tawm ntawm USB chaw nres nkoj yog qhov txuj ci tseem ceeb rau txhua tus neeg siv uas tso siab rau USB kev sib txuas.

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