820-00165 MBA, only missing bluetooth

[2informaticos]

Check continuity from U3510 to J3501.

Check for 3V at pin 4.
Did you try another airport card?

 

[Neil250]

U3510
1: 0 V
4:3.32 V
5:3.32 V
Tried another airport card off ebay

Continuity using diode mode
10 and J3501 PIN 17: GOOD so my jumper looks good
9 and J3501 PIN 16: GOOD

 

[2informaticos]

Check voltage and diode mode readings on pins 6/7 and 9/10.
You can also remove U3510 and bypass these pins...

 

[Neil250]

Can you explain what you mean by:

You can also remove U3510 and bypass these pins...

VOLTAGES:
6: 0
7: 0
9: 0
10: 0
4: 3.4
5: 3.4

That can't be good.

DIODE:
6: 0.40V
7: 0.40V
10: 0V
9: 0.70V

 

[2informaticos]

So you have 29 ohm to ground at USB_BT_CONN_P?
"10: 0V"
Does this mean 0.000 in diode mode?
I was expecting 0.015-0.030 in diode mode, for 29 ohm...

Check there removing airport card too.

BTW, you didn't put "V" for voltage, but for diode mode; any reason for that???
Always post diode mode in format xxx, if less than 1.000; we will understand 0.xxx for sure (no V needed).

 

[Neil250]

Problem solved
jumper pin 10 on U3510 to J3501 pin 17 brings back functioning Bluetooth