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Kamis, 20 Oktober 2011

3250 Mati Total dg problem komplikasi laen (copas Djawir)

3250 Mati Total dg problem komplikasi laen .. 
ponsel masuk dlm keadaan mati konyol .. (telanjang)
Informasi dr user,.. bekas kemasukan air n sdh 2 minggu dibiarin mati tergeletak.

Dicheck dg PSU, arus dlm kondisi Full Short ..
Langkah:
Disemprot cairan pembersih karatn, d'diamin bbrp wkt n terakhir dicuci dg thiner.
Dicheck ulang dg PSU, masih short.
*Angkat RETU, check -> short
*Cabut Z7520 (PA) -> check = short
*Cabut L7502 (AHNE) -> check = short
*Cabut L2301, L2306 n V2302 (TAHVO) -> check = arus 0.03A
*Ganti TAHVO n pasang kembali RETU n semua L n Z xg dicopot -> check = masih 0.03A

Dg arus 0.03A dicoba hidupkan = arus bgerak naik 2 tahap 0.08A -> 0.25A (sdh hidup)
Dilanjutkan check dg UFS = Check Boot -> OK n Info -> OK
Langkah lanjutan:
*Cabut L2305 (LED N2301) -> check = arus 0.03A
*Cabut L2309 (LED N2302) -> check = arus 0.03A
*Cabut Driver MMC -> check = arus 0.03A
*Cabut Bluetooth -> check = arus 0A
*Ganti Bluetooth -> check = arus 0A
*Pasang kembali kedua L sblm'y n drvir MMC
*Mgunakan MTBox,.. check product n rebuild PMM BT.

Dihidupkan dg Batt, kondisi OffLine n No MMC ..
*Kondisi jalur Conn SimCard keliatan OK -> ganti Emif R2700
*Check ConnMMC -> hambatan dioda pd pin 3, 4, 5 n 7 OK (R3200 OK)
*Ganti Driver MMC (N3200)

Dhidupkan kembali, kondisi Profil n MMC tdetect OK
Penyakit lain'y gx ad signal ..
*Search manual, gx ad pgerakan arus n dlm tempo hitungan bbrp detik az No Operator
*Asumsi xg rusak area VCO, check pd T7501 = signal Full Noise (VCO OK)
*Ganti C7511
*Dinyalakan.. signal muncul n drop
*Search manual = dapat all provider
*Ganti PA -> check = gx ad indikator signal sama sx (PA gx bagus)
*Ganti PA 2x -> check = signal ad n drop
*Ganti PA 3x (copotan) -> check OK n stabil

Pasang kembali n check kondisi laen, Buzzer, Speaker, Mic, BT, Camera, Charg n arus standby

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