820-2327 quick ask

[totosql]

Hi guys can I use a 30k res in 22k res MCP_VID<0> out to GND this line come from MCP 39 or U1400 I fix this from water damage some res and cap lost I m put back but I dont have 22k just 30k but a no sure if i can use in this case... thank you

 

[larossmann]

I have no idea, one way to find out. This looks like a basic termination resistor to keep reflections out of the signal, on something that regulates mcp vcore... yeah i wouldn't fuck with that. just find 22k.

 

[totosql]

I will get the right one thank you Louis

 

[totosql]

I got the res everything look good and boo white screen no chime no shit and think no the fuck res do some damage or something I take off from mb same, damm but a this mb work before install any cap o res so instinct i was cover two cap whit green shit because they little lose and i star from there c2531 c2535 i clean up around try boom the shit work wow but is kida rare i put some overcoat pen in little spot try it if i pick up some ohms nothing i m no sure w happen but it work now.

 

[totosql]

After I check everything run ok I found My usb front port fuck has power no broken line no aparente damage J4600 I follow the lines to u4650 this look like briged to smc debug mode i test the line pin 9 pp3v42_g3h pin 10 USB_DEBUGPRT_EN_L as power, that mean SEL=1 Choose USB s be work fine but no, any suggest ( other test j4600 pin1 5v pin2 3.33v pin3 3.32 v p4 gnd test p2,p3 = 0v look like they get some V front other place I did test the Other port was diferent p1 5v p2 0v p3 0v p4 gnd) any help is welcome thank's

 

[dukefawks]

Diode mode measurement on both data pins of USB connector?
You could remove U4650 and short R4651/52 to eliminate issue with debug MUX.

 

[totosql]

j4610 (good one) Diode mode measurement on both data pins of USB connector? = .931 j4600 (bad one) 1.630

 

[totosql]

j4610 (good one) Diode mode measurement on both data pins of USB connector? = .931 j4600 (bad one) 1.630

 

[dukefawks]

Both data pins are 1630 with positive to GND?

 

[totosql]

j4600 pin 2,3 data pin 1.660 between both of them, Gnd to pin 2, 1.265 pin 3 1.268 positive to gnd pin 2 0.555 pin 3 0.548 bad one

j4610 pin 2,3 data pin 0.921 between both of them, Gnd to pin 2, 0.524 pin 3 0.523 positive to gnd pin 2 0.545 pin 3 0.545 good one

 

[totosql]

umm look like one diode is gone probable the d4600

 

[totosql]

I changed the d4600 test same problem so I follow u step eliminate u4650 two little bridge and done work nice thank you for help duke