lenovo g50-45 charging problem

[menshawy]

hi my friends
lenovo g50-45
MB NM-A281
this machine working normally by dc adapter and battery
but when i bulged the adapter windows say bulged in ,and charging but battery present don't changing
i tried the battery on another machine and working normally
any help
pu4 (bq24737) values
ACN 1 20.3
ACP 2 20.3
CMPOUT 3 0.02
CMPIN 4 0.02
ACOK 5 0.02
ACDET 6 2.54
IOUT 7 0.01
SDA 8 3.33
SCL 9 3.33
ILIM 10 0.74
BM# 11 0.74
SRN 12 14.71
SRP 13 13.9
GND 14 0.01
LODRV 15 0.01
REGN 16 5.99
BTST 17 14.4
HIDRV 18 14.4
PHASE 19 14.4
VCC 20 20.3
changed pu4 without any result
thanks

[digitalpc]

Re: lenovo g50-45 charging problem

Check voltage in battery pin, and post.

[menshawy]

Re: lenovo g50-45 charging problem

Check voltage in battery pin, and post.

i will do
thanks for replay

[mcplslg123]

Re: lenovo g50-45 charging problem

your LODRV and HIDRV is not working. You need to check first your LOw and HIgh side fets connected to charger Ic.

[menshawy]

Re: lenovo g50-45 charging problem

Check voltage in battery pin, and post.

jbatt2
pin 1,2 15v
pin 3,4 3.3v
pin5 .3v
pin 6.7 gnd
thanks

[mcplslg123]

Re: lenovo g50-45 charging problem

jbatt2
pin 1,2 15v
pin 3,4 3.3v
pin5 .3v
pin 6.7 gnd
thanks

these measurements are perfectly ok.

[menshawy]

Re: lenovo g50-45 charging problem

these measurements are perfectly ok.

thanks friend
but what is the problem
may be ite8586?

[menshawy]

Re: lenovo g50-45 charging problem

another note
JDCIN1 pin3 (ADAPTER_id) value is 0v
but another mb is 1.9v

[mcplslg123]

Re: lenovo g50-45 charging problem

AD_ID must be ok for laptop to charge. So you need to probe AD_ID circuit.

[menshawy]

Re: lenovo g50-45 charging problem

AD_ID must be ok for laptop to charge. So you need to probe AD_ID circuit.

thanks friend

[menshawy]

Re: lenovo g50-45 charging problem


this is ADAPTER_ID circuit
pq28 pins
pin1 0v
pin2 0v
pin3 0v
pin4 gnd
pin5 3.3
pin6 3.3
pr420 ,pr424 1m ohm ok and replaced
pr420 pin1 vin 20v ok
ue1(ite8586)pin73 0v-ADAPTER_ID
pin84 - ADAPTER_ID_on# 3.3 ok
no pins short to gnd
what can i do ?

[menshawy]

Re: lenovo g50-45 charging problem

your LODRV and HIDRV is not working. You need to check first your LOw and HIgh side fets connected to charger Ic.

thanks friend
you are right
problem was solved
pq11 pin4 HIDRV must be 19v not 15v
i fond pq8 pin4(gate) not connected with pr56,pr57 i removed pq8 and clean its place and soldered another mosfet
pq11 pin4 19v ok
charging is ok
thanks for all