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820-00239 no turn on.
- Thread starter Sr. Robot
- Start date
Diode mode to ground on PPBUS_G3H and coils?
Remove F7000 and check C7050 voltage.
Remove F7000 and check C7050 voltage.
"L7410 0.001
L7420 .0L
L7430 .0L"
Are you sure?
All these coils are tied together.
Post U7000 basic voltages: P_IN, AUX_DET, SMC_RST_IN, VDDA/P, SMC_RST*, AUX_OK, A/BMON.
L7420 .0L
L7430 .0L"
Are you sure?
All these coils are tied together.
Post U7000 basic voltages: P_IN, AUX_DET, SMC_RST_IN, VDDA/P, SMC_RST*, AUX_OK, A/BMON.
What about SMC_RST_IN (SMC_4FINGERS_RST)???
Also check diode mode to ground at VDDA/P.
Also check diode mode to ground at VDDA/P.
Looks like bad U7000.
Just in case, remove C7075/7 first.
If still low readings, change U7000.
Just in case, remove C7075/7 first.
If still low readings, change U7000.
Yeah, that's other problem.
You shouldn't have 0.028 anymore on VDDA/P.
You can try to find the short on 3V3_G3H using voltage injection method.
You shouldn't have 0.028 anymore on VDDA/P.
You can try to find the short on 3V3_G3H using voltage injection method.
Replaced U7000
there was a short on CB300, replaced now got 3.3v on 3V3_G3H
Still no turn on.
PPVIN_G3H_P3V3G3H = 19v
PPDCIN_G3H_CHGR = 20v
TBA_AUX_DET = 4.97v
TBA_VDDP = 0v
SMC_RST_L = erratic between 0v and 2.3 v
TBA_VDDA =0v
SMC_AUX_OK = 3.4v
CHGR_BMON = 0v
CHGR_BMON = 0v
SMC_4FINGERS_RST = 0v
there was a short on CB300, replaced now got 3.3v on 3V3_G3H
Still no turn on.
PPVIN_G3H_P3V3G3H = 19v
PPDCIN_G3H_CHGR = 20v
TBA_AUX_DET = 4.97v
TBA_VDDP = 0v
SMC_RST_L = erratic between 0v and 2.3 v
TBA_VDDA =0v
SMC_AUX_OK = 3.4v
CHGR_BMON = 0v
CHGR_BMON = 0v
SMC_4FINGERS_RST = 0v
Check diode mode to ground at VDDA/P.
If no short, resolder/replace U7000.
If no short, resolder/replace U7000.
Do you get correct PPBUS_G3H voltage now?
Check SMC_USBC_INT_L level.
Test if board turns on in SMC bypass mode.
Test if board turns on in SMC bypass mode.
Remove F7000 and check again C7050 voltage.
Check resistance over C7020/23.
Also check diode mode to ground at C7050.
Are you sure U7000 has good solders?
Also check diode mode to ground at C7050.
Are you sure U7000 has good solders?