Hisense plasma TPW3208 black screen fault repair example - android - Phones Developers

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Electronic scale crystal oscillator 3.2*2.5mm 3225 16M (16.000MHZ) 12PF 10PPM 20PPM 30PPM

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Model: Hisense Plasma TPW3208
Movement: Plasma-MST6
Fault phenomenon: black screen fault point: C68
Analysis and repair: measure D52 positive pole to ground voltage is 0V, measure DC-DC converter circuit output voltage, VSC is 130V normal. When measuring DC-DC conversion circuit composed of IC35 (LM2585S-ADJ), find each output The voltage is 0. Check that the FS4 fuse is open, indicating that there is overcurrent. When checking IC36, IC37, IC38, IC39 in sequence, find IC37 short circuit, remove IC37, the retest line is still short circuit, and the line is disconnected. When the C68 is disconnected, the resistance value returns to normal. Remove the C68, install the FS4 fuse, and remove the power supply.