PTC: How kuongorora kuti serviceability?

Kazhinji CRT TVs akashandisa degaussing gadziriro iri revatema PTC. Sei cheki dunhu kana kukundikana woga, unofanira kuziva varidzi, vanoda kuita igadziridzwe pachako. Eremendi ane utano ehupfumi kuti anogona kutarisa senguva ohmmeter.

eremendi ehupfumi

Zvinofanira kuongorora chii PTC ndiko, sei kuedza pawo cheni - zvichava zvakajeka gare gare. chaikosha ichi anokwanisa kuchinja zvivako zvichienderana tembiricha. Its chaiko kwazvo akayera nemishonga. At kamuri tembiricha tsika ohmmeter zvinoratidza zviumbu kana makumi ezviuru ohms.

Kana neshungu, asi mumweya zvikuru bato anotanga kuchinja. Values ohmmeter kare zvinoratidza mazana pounds, uye inoti chakaipa mamiriro ane ichocho - chakaremara PTC. How kuongorora kana pane fungidziro pamusoro hunonyengera redunhu? Nzira kugadzirisa dambudziko iri riri pasi apa.

Nokuda ehupfumi ayo PTC thermistors vari zvinowanzoshandiswa microelectronics zvinangwa zvakasiyana-siyana:

• Power kuchengetedzwa redunhu. With yakawedzera ano manwiro rinopisa kumusoro maatomu akafanana uye nemishonga inowedzera kuti vaifanira, kana paine ano cutoff.
• The kudziyisa matunhu. Nemhaka PTC thermistor iri rakatangwa zvaitika kudzora kudziyisa.
• Mumatunhu ose tembiricha sensors.

Yomukati nhengo mudziyo

Resistor anoshandura kurwisa wayo kupisa, uyewo PTC. How kutarisa chinhu chokutanga? Nyore ichi. Resistor tsika-chinja mukati chiduku-siyana. PTC thermistor anokwanisa kuvhara zvachose kuitika kupfuura napo sezvo temistor. Chete zvapedzisira ane Ivan Kuchin ukama kuti tembiricha.

Kuti vazive kuti kutarisa serviceability pamusoro PTC thermistor, unofanira kutsanangura huru unongotaura kwayo. Idzi dzinosanganisira:

• Chezita nemishonga pa ambient tembiricha (Kazhinji 20-25 madhigirii);
• nemishonga neshanduko kunotemwa panguva kurwisa unhu, zvichienderana tembiricha, apo wokutanga parameter iri yakawedzera 2 nguva kufananidzwa aizviti ukoshi;
• kufadza voltage kuti angakudzivisai chinhu pasina kukundikana;
• ano mutoro tsika: chezita nokuchinja, kufadza zvinogoneka uye zviputse; kuongorora parameters izvi zvinokosha chete kana PTC ichashandiswa munyika mazano mukuru rwakatwasuka.

Chinhu ari demagnetization redunhu

How kutarisa PTC paTV? Mhinduro yomubvunzo inotevera kubva nheyo huchishanda. The mhosva chaikosha mufananidzo kusarurama kunoratidzwa magnetization. Kubvisa ichi chakaremara magadzirirwo afoot sefa anoshandiswa ngaatevedzane, PTC thermistor. zvakagadzirwa ichi anonzi rokunze loop, kufukidza rose pose chidzitiro kubva mukati.

PTC rinowanzoshandiswa chisimbiso chidzitiro chifukidzo redunhu iyo zvinoomesa dzayo-panzvimbo kuongorora. Pamberi kuyerwa anofanira chisimbiso-kure kupfuura rumwe rutivi afoot. The yakanakisisa Ipfungwa yaizova dzokubudisa wakakwana kubva remudunhu.

Nokuti zvinoitika kushandiswa iri kudziyisa chinhu kana gungano makamuri. Kuti aone pasina zvokunze kudziyisa kunodiwa kuti vaungane redunhu dhayagiramu uye kuona kupenda mhando PTC. Unobva mudziyo nameplate Data yakatarwa rwendo kuitika maatomu akafanana uye runoenzanirana tembiricha.

Serviceability thermistor zvinogona pamadiro kuisa kana furidza kudziyisa. Kana nemishonga kunowedzera, ipapo ndikwane maatomu akafanana. Zvisinei, muna musimboti ichi zvazvinosarira kuti ndingangokuvara yakakanganiswa pakuongororwa. Nokuti kurwisa redunhu zvinhu zvichisiyana nezera, zvichitungamirira kusagadzikana basa gungano.

Nei tichifanira kuva wemuTesitamende CRT?

On terevhizheni pasina degaussing hurongwa mufananidzo zvaizotorwa kukanganiswe pamwe zvishoma pokudzora remagetsi munda. It dzinozopenya ose midziyo, pemvura paNyika iri yonhuwa nemafungu asingaoneki.

Sezvo amplifiers, vakurukuri huru, kudziyisa zvinhu kazhinji riri kurutivi TV. Pasina chidzitiro chifukidzo mufananidzo kwaizoratidzwa akavhiringika zvachose. In basa kwokutanga runoyerera kuburikidza PTC thermistor duku ano haana kukonzera muchidziisa nayo. Kana chifukidzo iri panyama kushushikana mupfungwa kunobva munda.

It is rakaiswa remagineti uye demagnetize kuti masiki panguva akatendeuka pamusoro TV. Kazhinji izvi pamwe kutinhira kwakafanana akarova ngo. The makuru chidzitiro saizi, dzakanga kukwirira kwenzwi nokurira. PTC thermistor panguva ino ichipfuura mukuru-amplitude razvino, zvichiita kuti vakuchidzire. Kuwedzera kurwisa kunoitika uye redunhu eremendi dzevhudzi.

Options mhosva pamufananidzo sepombi

Apo pakutanga akatendeuka pamusoro kana mufananidzo wacho akavhiringika uye ripples vakachengeta zvisungo, ipapo yakakwirira mukana mhosva posistor. How kutarisa multimeter chinhu chuma? On redunhu kutonhora chakareruka kuita, nokuti thermistor kuramba kushoma.

Kazhinji pokunamatidza contactsGoogle inongova idonhe basa kwenguva refu. PTC zvinoreva dzekuvamba zano, vari kuramba kushanda huru mamiriro. An ohmmeter Check chidzitiro chifukidzo chokuita nechirwere pamusoro thermistor makumbo wechipiri. Kana ari mashoma, inoratidza yakachengeteka kubatana. Zvichida chinhu asingashandi pamusoro chekawo-kure.

Kana PTC thermistor riri chakaremara uye pfupi-circuited, nguva yokutanga ukadzoka pamusoro fiyuzi anopisa akabudisa simba rive. Kunopiwa kuti kunoitika pasina pachena pfupi mudunhu cheni, tarisa mhosva inogona waipedza zvachose chidzitiro Mask uye PTC.

Chinhu No cheni

Kana asina neshungu rwemberi kutonhora - redhiyeta, ipapo kuzvidzora kugadziriswa vanofanira kuziva kuti asimbise PTC. The firiji angashandiswa 2 mhando actuators: a PTC thermistors pamwe remagetsi relays. Chikamu simba rokutanga vakapedza kuti vakuchidzire kurasikirwa ari kurwisa chinhu, wechipiri zvishoma rakavimbika, asi kwete kupopotedzana.

Most PTC mu sefiriji vanofanira kuva nemishonga vanenge 20-30 ohms. Ari makobvu mamiriro kungava kilohms anoverengeka. Kana tsika dziri zvikuru kupfuura kuratidzwa, ipapo chinhu anofanira kutsiviwa. Zvinokosha kupa thermistor kuchitonhora mumba tembiricha asati yakayerwa.