Dab tsi yog txoj kev txij nkawm ntawm kev hloov hluav taws xob
STR-F6454 STR-F6454 yog ib qho tshwj xeeb tuab zaj duab xis Circuit Court rau hloov hluav taws xob, uas muaj oscillation circuit, overcurrent, overvoltage, voltage stabilization tswj thiab switching mem tes amplification circuits. Daim ntawv thov Circuit Court ntawm no tuab zaj duab xis thaiv hauv Changhong CN-11 core xim TV (H25K6O, 25Kl8, 29Kl9, C-29E6 thiab lwm yam qauv) yog pom nyob rau hauv daim duab. Kev saib xyuas cov kauj ruam ntawm cov xim TV nrog qhov kev txav no rov ua kom kub hnyiab STR-F6454 yog raws li hauv qab no:
1. Xyuas lub rectifier thiab lim circuit. Yog hais tias sab hauv ntawm lub fuse yog dub thiab STR-F6454 (NQB21) tawg thiab puas, xyuas lub rectifier diodes VD801A ~ VD8O4A, surge absorbing capacitors C805 ~ C808, ntxiv rau 300V lim capacitor C810, ncov absorbing capacitor C810 (C810), ncov absorbing capacitors Cov qauv tsis muaj C827, R823, R824, UB822).
2. Txheeb xyuas qhov hluav taws xob sab nraud ntawm STR-F6454 (4) tus pin STR-F6454 (4) tus pin yog lub tshuab hluav taws xob hluav taws xob rau lub zog pib, thiab qhov hluav taws xob ib txwm yog 18.2V. Yog tias qhov hluav taws xob ntawm tus pin no tsawg dua 11V thiab ruaj khov, xyuas cov hluav taws xob hluav taws xob hluav taws xob hluav taws xob nrog cov khoom siv xws li V801, VD808 (18V), VD803 (22V) raws li cov tub ntxhais; Yog tias nws hloov pauv ntawm 11V ~ 15V, nws txhais tau hais tias qhov hloov hluav taws xob hloov pauv tau pib oscillate, tom qab ntawd xyuas qhov hloov pauv hloov pauv theem ob rectifier, lim Cheebtsam thiab thauj khoom Circuit Court rau luv luv, tshwj xeeb tshaj yog cov kab hluav taws xob.
3. Txheeb xyuas qhov voltage stabilization tswj voj. Yog tias qhov ntxiv B voltage poob los ntawm 160V mus rau xoom thaum lub sijhawm fais fab tuag, xyuas qhov voltage stabilization tswj lub voj voog. Koj tuaj yeem ua ntej hloov lub optocoupler N830, thiab tom qab ntawd hloov qhov yuam kev amplifier N831. Nws yog qhov zoo tshaj los xyuas seb R807 qhib.
Lus Cim: Schottky diode AKO3 yog sab nraud txuas ntawm tus pins (4) thiab (5) ntawm IC no. Hauv kev xyaum, lub diode no yuav tsis raug ntsia, lossis RU2, RU4, 55295 thiab lwm yam diodes yuav siv tau.
