Need to do that to get acces to the pins.
In case, the same pins do not have another available test points on their traces.
In case, the same pins do not have another available test points on their traces.
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A1708 820-00840-A 5V 400ma
- Thread starter briancomputerdoctor
- Start date
briancomputerdoctor
Member
I have replaced the charging port and now I get 20v 200ma however there is no post. I check the traces and they are good. I then checked all the old readings and there is no change.
Do you get voltage on big coils now?
briancomputerdoctor
Member
GTVR_SW3 0v
PPVCCGT_S0G_PH3 0v
GTVR_SW1 0v
PPVCCGT_S0G_PH1 0v
GTVR_SW2 0v
PPVCCGT_S0G_PH2 0v
PPVCCGT_S0G_PH3 0v
GTVR_SW1 0v
PPVCCGT_S0G_PH1 0v
GTVR_SW2 0v
PPVCCGT_S0G_PH2 0v
briancomputerdoctor
Member
I'm not getting voltage on SMC anymore.
SMC_USBC_INT_L gives 0v
SMC_RESET_L gives 0v
SMC_USBC_INT_L gives 0v
SMC_RESET_L gives 0v
briancomputerdoctor
Member
Checking everything again this morning. Now not getting some LDO rails and not getting PP3V3 or PPBUS. Still at 20v 200mA.
U3100 Pin 2 PP1v8_UPC_XA_LDOD = 1.8v 0.452,, Pin 12 PP3v3_UPC_XA__LDO = 3.284v 0.477,, Pin 35 PP1v1_UPC_XA_LDO = 0v 0.461,, Pin 75 PP1v8_UPC_XA_LDO = 1.78v 0.483
U3200 Pin 2 PP1v8_UPC_XB_LDOD = 1.79v 0.448,, Pin 12 PP3v3_UPC_XB__LDO = 3.32v 0.478,, Pin 35 PP1v1_UPC_XB_LDO = 0v 0.457,, Pin 75 PP1v8_UPC_XB_LDO = 1.8v 0.48
PP3V3_G3H = 0v 0.338
PPBUS_G3H = 0v 0.394
U3100 Pin 2 PP1v8_UPC_XA_LDOD = 1.8v 0.452,, Pin 12 PP3v3_UPC_XA__LDO = 3.284v 0.477,, Pin 35 PP1v1_UPC_XA_LDO = 0v 0.461,, Pin 75 PP1v8_UPC_XA_LDO = 1.78v 0.483
U3200 Pin 2 PP1v8_UPC_XB_LDOD = 1.79v 0.448,, Pin 12 PP3v3_UPC_XB__LDO = 3.32v 0.478,, Pin 35 PP1v1_UPC_XB_LDO = 0v 0.457,, Pin 75 PP1v8_UPC_XB_LDO = 1.8v 0.48
PP3V3_G3H = 0v 0.338
PPBUS_G3H = 0v 0.394
The problem is not in USB-C area, if you get 20V on both USB-C ports.
Do you get R7020 voltage?
Post diode mode to ground at F7000 and L6995.
For the future, do not waste time searching for iGPU voltage; nor even on working board!
Do you get R7020 voltage?
Post diode mode to ground at F7000 and L6995.
For the future, do not waste time searching for iGPU voltage; nor even on working board!
Last edited:
briancomputerdoctor
Member
I thought I was that was the "big coils". Where are the big coils then?
briancomputerdoctor
Member
Test pad: PPDCIN_G3H 20v 0.522
Last edited:
briancomputerdoctor
Member
F7000 0.394
L6995 0.338
L6995 0.338
"I thought I was that was the "big coils""
And you've only seen L7410/20/30 ont the board?
I said big, not biggest.
There are some other smaller coils, which enter in the same "big" category.
You've just stopped on the irrelevant ones.
Post D6905 voltages...
And you've only seen L7410/20/30 ont the board?
I said big, not biggest.
There are some other smaller coils, which enter in the same "big" category.
You've just stopped on the irrelevant ones.
Post D6905 voltages...
briancomputerdoctor
Member
briancomputerdoctor
Member
D6905
PPBUS_G3H_R 13v
PPDCIN_G3H_CHRG_R 19.99v
PPVIN_G3H_P3V3G3H 19.68v
PPBUS_G3H_R 13v
PPDCIN_G3H_CHRG_R 19.99v
PPVIN_G3H_P3V3G3H 19.68v
briancomputerdoctor
Member
The only big coil with voltage is L7690 with 3.3v
So you have 13V at PPBUS_G3H.
That implies correct 3V3_G3H also.
"PP3V3_G3H = 0v 0.338
PPBUS_G3H = 0v 0.394"
Can you tell us which is the actual situation for sure?
That implies correct 3V3_G3H also.
"PP3V3_G3H = 0v 0.338
PPBUS_G3H = 0v 0.394"
Can you tell us which is the actual situation for sure?
briancomputerdoctor
Member
PP3V3_G3H 3.4v
PPBUS_G3H 13.05v
PPBUS_G3H 13.05v
briancomputerdoctor
Member
I was getting different readings due to my power tester. Sometimes when I unplug from the board and reinsert the tester will say 20v but amperage was 50mA (which I did not see). Power cycling the tester brings it back to 200mA.
Apologies.
Apologies.
Do you get 3V3_S5G?
Trigger SMC_ONOFF_L and check for pulse at PM_SLP_S5_L.
Trigger SMC_ONOFF_L and check for pulse at PM_SLP_S5_L.
briancomputerdoctor
Member
No PP3V3_S3G
and no pulse.
and no pulse.
Did you check at same time when trigger SMC_ONOFF_L?
Do the same for PM_PWRBTN_L; should catch a drop pulse there.
Do the same for PM_PWRBTN_L; should catch a drop pulse there.