cara modifikasi inverter backlight tv led

Transistor LG Slim 21 in
C5149, C5296, C5885. C6090, C6092, C6093, TT2138, TT2140, TT2222, J6810, D2499, BU2520AF

lampu led
https://shope.ee/8pM4KrLPZ2

variasi led
https://shope.ee/4AaEmLopSj

asesoris lampu led
https://shope.ee/kfokpsOP

led dan spearpart
https://shope.ee/kfokpsOP

jilbab anak led
https://shope.ee/2ApAOudBVK

led motor
https://shope.ee/B461HIywa

led master
https://shope.ee/4fWVNj6Ct1


TV LG ultra slim
model : 21LS2RD
chasis : CW81A
ic 02 : 24C16/epprom
ic 04 : KIA78L05/vdd +5V micom
ic 301 : LA78141
ic 401 : KA393
ic 501 EAN60681601/LV76211 3C 5AL5
ic 601 : LA42012
ic 810 : STRW6553
ic 804 : KIA78R09/+9V
ic 805 : KIA7805/+5V
FBT : BSC25N0329
pin 1 colector
pin 2 B+180V
pin 3 B+115V
pin 4 GND
pin 5 inner/N.C
pin 6 B+26V
pin 7 N.C
pin 8 ABL
pin 9 Heater
pin 10 AFC
kerusakan awal start LED standby hanya nyala sekejap dan bunyi cit cit,terus ilang,bongkar chasing cek :
T403 C6090 tidak short
D406 tidak short
FBT tidak short
D823,D824,D826 tidak short
ic 601 tidak short
cek lagi ketemu elco C826 1000uf/16V turun kapasitas/ESR juga naik
C834 2200uf/25V juga kembung
ganti C826,C834 tv start alhamdulillah clink
Data tambahan :
A. proteksi :
pin protek utama pin 29/ABN/abnormal terukur normal +4.96V
sensor protect Q403 BF421/protect OCP/over current protection,proteksi arus/beban berlebih pada PSU,penyebab protek bisa dari output PSU drop,karena T403 konslet,D406 konslet,FBT konslet,ic 301 konslet,Q405 K2961 konslet,FR403 2.4 ohm 2 watt naik hambatnnya
Q301 proteksi sync vertikal,akan protec jika ic 301 konslet/tidak bekerja normal,yoke vertikal putus,FR391 putus
nonaktifkan protect cabut solderan colector transistor Q16 C5343
B. data tegangan normal :
1. PSU :
primer PSU ic 810 :
pin 1 +264VDC
pin 2 gnd
pin 3 +19.4VDC
pin 4 +4.1VDC
pin 5 +1.7VDC
pin 6 0 V
ic 802 :
pin 1 +11.43V
pin 2 +10.39V
pin 3 +7.07V
pin 4 +19.4V
Sekunder PSU :
katoda D826 +115.2V
katoda D823 +11.44V
katoda D824 +20.4V
2. ic 301 LA78141 :
pin 1 : +2.26V
pin 2 : +29.1V
pin 3 : +2.82V
pin 4 gnd
pin 5 : +15.27V
pin 6 : +29.4V
pin 7 : +2.26V
3. ic 401 KA393 :
pin 1-4 gnd
pin 5 : +3.12V/in EW
pin 6 : + 3.04V/FBP
pin 7 : +2.11V/out gate
pin 8 : +29.1V/vcc in
Q405 K2961 FET EW :
drain : +13.89VDC
4. primer travo driver horisontal saat ON : +56.7V
5. ic 804 KIA78R09 :
pin 1 : +11.44
pin 2 : +8.91V
pin 3 gnd
pin 4 : +4.67V
C. daftar kerusaka dan solasi :
1. tv start gambar melebar menyempit mengikuti terang redup gambar cek/ganti :
C415 333/630V
2. tv start TR T403 langsung short cek/ganti :
C414 183/2000V
D406 RS4HF
3. gambar melebar kanan kiri cek/ganti :
D407 RU4AF
Q405 K2961
4. gambar melengkung kedalam cek/ganti :
401
5. EW tidak bisa diadjuzt cek/ganti :
C415 333/630V
C412 364 250V
C413 563/630V
L401
Q405 K2961
ic 401 KA393
6. ic 301 pecah saat start B+115V normal cek/ganti :
C415 333/630V
C412 364 250V
C413 563/630V
C414 183/2000V/turun kapasitas dikit maka semua out FBT tegangan akan naik
7. tv start gak lama mati total cek/ganti :
ic 810 STRW6553
C826 1000uf/16V
DC to DC input 5 sampai 20 volt
output 38 volt

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