pin protect tv LG super slim chasis CW81A,ic SAA33469301/LV76213

Catatan lama 27 maret 2017 semoga bermanfaat :
Daftar kerusakan dan pin protect tv LG super slim chasis CW81A,ic SAA33469301/LV76213 :
Pin protect :
Pin 29 pin protect utama terukur normal +4.90V
Q301 C103 protect vertikal akan protect jika ic 301 STV9326 short
Q403 BF421 protect OCP/over current protection akan protect jika :
- R403 2.2 ohm naik hambatannya
- transistor Q402 C6090 short
- flyback 6174Z-6006 short
Daftar kerusakan dan solasi :
1. Gambar kembang kempis cek/ganti :
- C406 183/630V turun kapasitas
2. Transistor Q402 C6090 short saat start pertama cek/ganti :
- capasitor resonan C414 183/2000V turun kapasitas
- FBT 6174Z-6006H rusak/short
3. Ic 301 STV9326 pecah saat start cek/ganti :
- C406 183/630V
- cabut dulu salah satu kaki dioda D404 dari emittor Q405 A1659A
4. Buat tv/AV ada suara/tidak ada gambar OSD ada cek/ganti :
- ic 751 LA72730
5. Garis2 mendatar diatas layar cek/ganti :
- elco pump up C307 100uf/35V
6. Contrast dan brightness maximal tapi gambar suram cek/ganti :
- R547 100K ABL flyback biasanya naik hambatannya/G2 tegangan normal
7. Output PSU pertama normal lama2 hilang/gak sampai 1 menit cek/ganti :
- switch on/off biasanya rusak kadang nyambung/kadang gak
- elco C826 1000uf/16V biasanya turun kapasitas
8. Output PSU drop cuma 50-60VDC di + elco C814 220uf/160V cek/ganti :
- Q840 KIA431
- elco C847 1uf/250V turun kapasitas biasanya output PSU naik turun
9. Tv start gak lama mati total/1-2 menit cek/ganti :
- ic 810 STRW6554A
10. Garis2 hitam berdiri dilayar/saat blueback cek/ganti :
- elco C540 4.7uf/250V
Data tegangan normal :
Primer PSU ic STRW6554A :
Pin 1 : +279V
Pin 2 : GND
Pin 3 : +20.9V
Pin 4 : +4.01V
Pin 5 : +1.74V
Pin 6 : +0.77V
Sekunder PSU :
Katoda D826 : +124.5V
Katoda D823 : +12.31V
Katoda D804 : +16.96V
Ic 301 STV9326 :
Pin 1 : +2.14V
Pin 2 : +28.4V
Pin 3 : +1.34V
Pin 4 : GND
Pin 5 : +13.26V
Pin 6 : +28.6V
Pin 7 : +2.14V
Emittor Q405 A1659A : +12.46V
Ic 401 TDA8145 :
Pin 1 : +8.55V
Pin 2 : +5.70V
Pin 3 : + 8.55V
Pin 4 : GND
Pin 5 : +11.93V/EW out
Pin 6 : +28.4V vcc ew
Pin 7 : +3.02V para/in EW
Pin 8 : +2.93V FBP
Ic 601 LA42102
Pin 1 : +16.26V
Pin 2 : 0V in L
Pin 3 : GND
Pin 4 : 0V IN R
pin 5 : +5.01V mute
pin 6 : 0V ATT
Pin 7 : +16.96V
pin 8 : +7.92V SP R+
pin 9 : +8.06V SP R-
pin 10 : GND
pin 11 : +8.10V SP L-
pin 12 : +8.18V SP L+
Pin 13 : N.C
Ic 801 KIA78R09 :
Pin 1 : +12.31V input
Pin 2 : + +9.06V output
Pin 3 : GND
Pin 4 : +4.63V switch on/off
Ic 805 KIA7805 :
Pin 1 : +7.93V input
Pin 2 : GND
Pin 3 : +5.02V output
Ic 04 78L05 :
Pin 1 : + 4.94V output
Pin 2 : GND
Pin 3 : +12.04V
Heater : 5.94VAC
ABL flyback : +11.67V
Tuner :
AGC : +4.32V
ADR/GND
SCL : +4.65V
SDA : +4.56V
B+ : 5.10V
B+33V : +31.6V
IF out
G2/screen : +270V

Sumber: Oscar Permana