Kev daws teeb meem rau kev ua txhaum ntawm cov khoom siv fais fab
1. Cov khoom siv hluav taws xob tswj tau muaj cov zis, tab sis nws tsis kuaj tus kheej thaum nws qhib
Qhov no feem ntau yog tshwm sim los ntawm kev ncua sij hawm tsis txaus lossis tsis muaj qhov tso tawm ntawm PW-OK teeb liab ntawm lub hwj chim mov. Tom qab pib, siv lub voltmeter los ntsuas seb puas muaj ntxiv 5V ntawm qhov tso zis tawm ntawm PW-OK (pin 8 ntawm lub hwj chim ntsaws). Lub sijhawm no, xyuas seb qhov sib piv LM393 puas puas. Yog tias qhov ncua sij hawm tsis txaus, xyuas cov resistor R104 thiab capacitor C60 hauv qhov ncua sij hawm.
2. Cov zis hluav taws xob ntawm cov khoom siv hluav taws xob tswj tsis raug
Yog tias tsuas yog ib lub iav qhov hluav taws xob sib txawv ntawm tus nqi ntsuas, thaum lwm qhov iav qhov hluav taws xob yog qhov qub, nws txhais tau hais tias kev sib txuas hluav taws xob hluav taws xob hluav taws xob lossis hluav taws xob rectifier diode ntawm lub iav voltage no puas. Yog tias txhua qhov sib txawv ntawm tus nqi ntsuas, nws yog qhov yuam kev amplifier ntawm tus pin 1 thiab tus pin 2 ntawm IC1, qhov tsis zoo tawm tswv yim voj ntawm qhov yuam kev amplifier ntawm R39 thiab C32, thiab cov qauv resistor R33, R34 thiab R35, uas yog qhov ntxiv 5V. thiab ntxiv rau 12V tsis siv neeg voltage stabilization tswj Circuit Court yog faulty.
Ua tib zoo saib thaum hloov lub diode nyob rau hauv cov tswj fais fab mov Circuit Court, vim hais tias lub inverter muaj ib tug siab khiav hauj lwm zaus, feem ntau ntau tshaj 20kHz, thiab lub load tam sim no kuj kuj loj, yog li ntawd lub ntxiv 5V ntau yam ntawm lub hwj chim mov siv ib tug Schottky high- zaus rectifier diode SBD , Tus so ntawm lub zog kuj siv high-frequency rectifier diodes FRD nrog cov yam ntxwv zoo. Yog li ntawd, sim nrhiav tib hom rectifier diode thaum hloov nws, thiaj li tsis ua kom puas nws dua.
3. Lub kiv cua tsis tig los yog ua suab nrov
Cov kiv cua ntawm lub computer tswj fais fab mov feem ntau yog siv lub kiv cua DC txuas nrog ntxiv rau 12V DC tso zis davhlau ya nyob twg. Yog hais tias lub zog tawm tswv yim thiab cov zis yog txhua yam, tab sis tus kiv cua tsis tig, kiv cua lub cev muaj zog yuav puas. Yog tias muaj suab nrov, ib qho ntawm cov laj thawj yog vim li cas plaub qhov kho cov ntsia hlau ntawm lub kiv cua yog xoob vim lub sijhawm ua haujlwm ntawm lub tshuab los yog kev vibration hnyav thaum thauj; Lwm qhov yog tias muaj plua plav ntau dhau hauv lub kiv cua lossis cov kabmob oily yog luv ntawm cov roj. Cov roj nplua nyeem zoo tshaj plaws, qhov txhaum tuaj yeem txiav txim siab.
4. DC fais fab mov tsis muaj cov zis tom qab tswj tau pib
(1) Lub laub raj VT3 thiab VT4 ntawm thawj sab ntawm T2 puas lawm, thiab tus nqi tsis kam ntawm R54 yuav loj dua; (2) Yam tsawg kawg yog ib qho ntawm cov raj hloov VT1 thiab VT2 ntawm ib nrab-bridge fais fab hloov hluav taws xob tau qhib; (3) Lub peev xwm ntawm kev tiv thaiv kev tsis ncaj ncees capacitor C8 ua me me los yog qhib Circuit Court.
5. Lub peev xwm thauj khoom ntawm kev tswj fais fab tsis zoo
Lub peev xwm tsis zoo ntawm cov khoom siv hluav taws xob tswj tau yog tshwm sim nyob rau hauv: lub hwj huam mov tuaj yeem ua haujlwm ib txwm nyob rau hauv lub teeb load, xws li thaum nws tsuas yog muab lub zog rau lub rooj tsavxwm thiab floppy drive, tab sis thaum nws nruab nrog lub hard disk loj. thiab lwm yam khoom siv tau nthuav dav, cov khoom siv hluav taws xob feem ntau tsis ua haujlwm li qub. Qhov xwm txheej no feem ntau yog vim kev ua haujlwm tsis zoo ntawm cov hlab hloov VT1 thiab VT2 ntawm lub zog hloov hluav taws xob, thiab lub peev xwm ntawm cov lim capacitors C5 thiab C6 tsis txaus. Thaum hloov lub lim capacitor, nws yuav tsum tau muab sau tseg tias lub peev xwm thiab withstand voltage ntawm ob lub capacitor yuav tsum zoo ib yam.
