820-3115-b board, ppbus_g3h 14.24v!!

[turbo]

820-3115 board, there was no green light then i notice u7000 not good, i changed it , now green light , and ppbus_g3h im getting 14.-15 v, b4 doing all the work i took out f7040 fuse,



why its 14.5 v ? what do i check

 

[aprendiz]

Check sense resistors R7020, R7021, R7022, R7050, R7051, R7052....

 

[larossmann]

Your multimeter's batteries are dead. Fucked up R7050/R7051/R7052 will cause battery not charging or quarter fan spin, R7020/R7021/R7022 are the only ones that will cause voltage change, and that's voltage drop, not increase.

Is it turning on?

 

[turbo]

all R7020, R7021, R7022, R7050, R7051, R7052.... is good, yes it turns on if i connect the the fuse... i didnt run it more then one min what if 14v do some harm,.... my multimeter is good...

 

[turbo]

louissssssssss i fixed it ..!!!!!! r7051 and r7052 was disconnected from r7050,,.... i had to do jumper.... chk picture!!!!!

 

[turbo]

louissssssssss i fixed it ..!!!!!! r7051 and r7052 was disconnected from r7050,,.... i had to do jumper.... chk picture!!!!!

 

[aprendiz]

Good work, just one advice, don't run wires over ISL, go around it....

 

[turbo]

now everything is fine but battery not charging... computer work all good, no yellow light , green light on all the time.. any advice?

 

[JorgePayar]

did you try a smc reset? If nothing happens...check u7000 pins 27/28 on resistance mode and write down values 17/18 pins too, I had the same problem on the same board 2 days ago.

 

[aprendiz]

As I told you from the first time, check sense resistors and traces of course, also check voltage on pins 4 and 6 from J6950, both should have about 3.4V......

 

[turbo]

CHGR_BGATE pin from U7000 going to Q7055 good, and 12v, which should be 5 v to turn on q7055. why chgr_bgate 12V???

 

[aprendiz]

Could be a bad battery too.....

 

[turbo]

i put a good battery , still same thing CHGR_BGATE pin from U7000 going to Q7055 good, and 12v, which should be 5 v to turn on q7055. why chgr_bgate 12V???

 

[aprendiz]

Can you measure resistance on C7050 (one probe on pin 1 the other in pin 2), report value...

 

[turbo]

2.6ohm on c7050

 

[larossmann]

check current sensing circuit for charger as well. if it charges when it is OFF but not when it is ON, R7020/R7021/R7022/traces between them may be broken

 

[dukefawks]

Is the battery detected in OSX?