820-02016 not working

[bartech]

there is short on ppvbat_aon_chgr_reg, i change u5200 but the same
i take out r5261/2 and short is alsow on chgr_cs_p/n

 

[2informaticos]

Remove F5200 and check which side the short remains.

 

[bartech]

at ppbus_aon

 

[2informaticos]

Then why replaced U5200???

What is the exact ohm resistance to ground?
Compare with the readings on all secondary coils.

 

[bartech]

1,2 ohm

 

[bartech]

?

 

[2informaticos]

"Compare with the readings on all secondary coils"
???

 

[bartech]

repaired , cr812 make short to ground on ppbus_aon_l_spkramp. thanks for help

 

[bartech]

come back again, it starting and work till you try to watch youtube... when you push play on youtube - pink screen and restart, now its not starting.when i connect power there is shot on F5200 and u5200 get hot but changing u5200 dont change anything

 

[2informaticos]

"when i connect power there is shot on F5200"
Are you checking in diode mode with power applied???

Allow 10-15s once power is removed (including battery), before checking in diode mode, or ohm scale.

 

[bartech]

ppbus_aon - 4.5v u5200 get hot, changed - the same
u5700 only pbus_aon - 4,5v i change it but the same

 

[2informaticos]

Remove F5200 again and check C5254 voltage.

 

[bartech]

c5254 - 5,28v

 

[2informaticos]

Then your problem is on U5200 area.
Check R/C/Q5230/40 and their traces.
Be sure all resistors around U5200 are good.

 

[bartech]

i change q5230and 40 and start working but still got problem that when i try to use youtube or even conecting charger it reset because of sound, i found problem - ur600 . i change that and now sound work and dont restart. thanks for help