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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Samsung > Samsung Hardware Repair

Samsung Hardware Repair Post here your Hardware Repairing Hints or Problems with Samsung Phones.

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Old 03-18-2018, 21:56   #1 (permalink)
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G930f galaxy s7 dead and shorted


hello,

i have to try to repair a g930f s7. no reaction when pluged in : no diode, no vibration, not recognize by pc.
it is hot

i have tested some caps and i have found many caps shorted. all caps around u7000 and u7001. i also find cap c8012 short.
not tested all caps but this is.

can anyone can help me find the faulty one.
the board was not water damaged.
the voltage at the battery connector is 1.8V

thank you
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Old 03-20-2018, 23:26   #2 (permalink)
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up,

i have found a faulty caps near pmic, removed it, now the phone charge and works.
but it becomes very hot near by the pmic but not always, the battery drain not very fast but it drains
i found a line that it is at 0.35 in diode mode : all the coils a the left of the pmic ( the phone horizontal and the start buton down)
but i can't find the reason why. maybe pmic but i don't want to remove it

do you think that can be the reason ?

thx
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Old 03-21-2018, 01:07   #3 (permalink)
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maybe it is c7099, but it seems to be attached on ground on two extremities, strange..
can anyone can mesure indiode mode the values at each point of c7099 please ??
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Old 03-21-2018, 06:02   #4 (permalink)
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both sides of C7099 are attached to the ground. it is a so called "dummy cap"

look at the schematics about this. the C7099 has no purpose.
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