Post some U7000 voltages; P_IN, AUX_DET, VDDA/P, SMC_AUX_OK, CHGR_A/BMON.
Post ohm resistance over C7020/23 caps.
Try to start in SMC bypass mode.
Post ohm resistance over C7020/23 caps.
Try to start in SMC bypass mode.
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820-00840 liquid damage, no power
- Thread starter Victor Holley
- Start date
Victor Holley
Member
P_IN = 20.56
AUX_DET = 4.92
VDD/A = 3.01
VDD/B = 5.11
SMC_AUX_OK =_3.41
CHGR_AMON = 3.4
CHGR_BMON = 0
c7020 2.9
c7023 2.9
SMC BYPASS was unsuccessful for fan spin
AUX_DET = 4.92
VDD/A = 3.01
VDD/B = 5.11
SMC_AUX_OK =_3.41
CHGR_AMON = 3.4
CHGR_BMON = 0
c7020 2.9
c7023 2.9
SMC BYPASS was unsuccessful for fan spin
Last edited:
"VDD/A = 3.01"
Check R7075.
Check R7075.
Victor Holley
Member
I replaced earlier the two corroded resistors 7022 and R7021 before I took the U7000 area measurements and reported them here.
On inspection, I realize that U7000 was not even--I must have nudged it during resistor replacement. I reballed it and returned it to the board.
Now Usbc port activity is 20v, 0.03A switching to 0A and back to 0.03A, or steady 0A
PPBUSG3H = 0.08v
PPBUSG3H diode mode =0.400
VDD/A = 1.09v
VDD/P is same 1.09v
On inspection, I realize that U7000 was not even--I must have nudged it during resistor replacement. I reballed it and returned it to the board.
Now Usbc port activity is 20v, 0.03A switching to 0A and back to 0.03A, or steady 0A
PPBUSG3H = 0.08v
PPBUSG3H diode mode =0.400
VDD/A = 1.09v
VDD/P is same 1.09v
"VDD/A = 1.09v
VDD/P is same 1.09v"
You get now worst values.
Post the other (above) mentioned voltages for U7000.
VDD/P is same 1.09v"
You get now worst values.
Post the other (above) mentioned voltages for U7000.
Victor Holley
Member
Would it be possible for you to post a list instead of the correct values?
You have the list on your second post.
Just write the actual values.
Just write the actual values.
Victor Holley
Member
My preference would be to understand what U7000 does so that I can troubleshoot on my own.
For example, I can see that U7000 has power in from usbc charger, after it passes current sensing resistor R7020
I see CSIN and CSIP which are the two sides of the input current sensing circuit.
I see AUX_DET which probably stands for something like auxiliary detection which must be when something other than a charger is plugged into usbc
SGATE and AGATE I recognize them as common in chips that control mosfets--I guess this is how the chip switches the mosfets
I don't know MPM Detection
PP3v3_G3H seems like another power in
I see a couple of data lines where U7000 talks to SMC
I see HPWR_EN_L which is an enable for U7000, I'm not sure where it is from
CHGR AMON and BMON I recognize as common lines for charging chips but I don't know what they do. I would like to know these lines.
There is an output PM_EN_P3v3G3H which probably tells the power management chip that usbc has been plugged in?
BGATE line probably goes with SGATE and AGATE to control the mosfets
CSOP and CSON are current sense circuits for the chip outputs?
Ultimately U7000 talks to SMC and if it is told yes then it switches the mosfets to generate PPBUS_G3H from the DCIN and/or from the Battery, and it uses DCIN to charge the battery. Is this right?
For example, I can see that U7000 has power in from usbc charger, after it passes current sensing resistor R7020
I see CSIN and CSIP which are the two sides of the input current sensing circuit.
I see AUX_DET which probably stands for something like auxiliary detection which must be when something other than a charger is plugged into usbc
SGATE and AGATE I recognize them as common in chips that control mosfets--I guess this is how the chip switches the mosfets
I don't know MPM Detection
PP3v3_G3H seems like another power in
I see a couple of data lines where U7000 talks to SMC
I see HPWR_EN_L which is an enable for U7000, I'm not sure where it is from
CHGR AMON and BMON I recognize as common lines for charging chips but I don't know what they do. I would like to know these lines.
There is an output PM_EN_P3v3G3H which probably tells the power management chip that usbc has been plugged in?
BGATE line probably goes with SGATE and AGATE to control the mosfets
CSOP and CSON are current sense circuits for the chip outputs?
Ultimately U7000 talks to SMC and if it is told yes then it switches the mosfets to generate PPBUS_G3H from the DCIN and/or from the Battery, and it uses DCIN to charge the battery. Is this right?
Victor Holley
Member
Are you saying the previous post has all correct values listed except for VDD/A?
What does VDD/A do?
No datasheet available.
But you can compare with an old chip, like ISL6255/57; VDD/P described there.
I said to check R7075, take your time.
If good, then should get equal values in second post too.
You've got wrong voltages after reballed U7000.
So chip is fried, or bad solders.
But you can compare with an old chip, like ISL6255/57; VDD/P described there.
I said to check R7075, take your time.
If good, then should get equal values in second post too.
You've got wrong voltages after reballed U7000.
So chip is fried, or bad solders.
Victor Holley
Member
Replaced u7000.
Usb-c port "A" 20v .03a
Usb-c port "B" restarts
Relatively new OEM from Apple Store 96watt Macbook charger block stopped working.
Replaced two cd3215 with CD3215C0068AQ4CW from China
Both USB-C port status returned identical results. 5V 0.03a.
Usb-c port "A" 20v .03a
Usb-c port "B" restarts
Relatively new OEM from Apple Store 96watt Macbook charger block stopped working.
Replaced two cd3215 with CD3215C0068AQ4CW from China
Both USB-C port status returned identical results. 5V 0.03a.
Why did you change CD3215 chip where you've got 20V?
Put back that chip.
Possible bad new chips, or incorrect solders.
Put back that chip.
Possible bad new chips, or incorrect solders.
Victor Holley
Member
"Why change a CD3215 that is getting 20v"
Because before changing U7000, I had 20v on BOTH ports.
Then I changed U7000 and now the usbc ports have changed.
Now one is 20v lowA and the other is restarting.
This means something happened with ELECTRICAL damage. I can not trust chips that I know have electrical damage.
It sounds like if 5v is on the ports this is CD3215 problem. I am posting here to see if that is true, or if there is something else to think about given the history of this case. I also am not sure if there is compatibility problems with CD3215 so I posted the whole number.
For example, in iPhone 5 tristar is A1608A1 and is not compatible with A1610A1, however A1610A1 can be swapped with A1610A2,A3 etc.
Because before changing U7000, I had 20v on BOTH ports.
Then I changed U7000 and now the usbc ports have changed.
Now one is 20v lowA and the other is restarting.
This means something happened with ELECTRICAL damage. I can not trust chips that I know have electrical damage.
It sounds like if 5v is on the ports this is CD3215 problem. I am posting here to see if that is true, or if there is something else to think about given the history of this case. I also am not sure if there is compatibility problems with CD3215 so I posted the whole number.
For example, in iPhone 5 tristar is A1608A1 and is not compatible with A1610A1, however A1610A1 can be swapped with A1610A2,A3 etc.
C00 termination is what matters here.
If USB-C ports behaviour changed after replacing U7000, then should be corrosion problem.
One port is more affected than other.
Your previous post stated to have 5V on both ports...
If USB-C ports behaviour changed after replacing U7000, then should be corrosion problem.
One port is more affected than other.
Your previous post stated to have 5V on both ports...
Victor Holley
Member
Scroll up--maybe I have been unclear?
My goal was to give as much history as possible.
Copy/paste from above: I searched forum and read posts. Learned that step one is make both usb c ports the same.
Diode mode of LDO rails showed a short on PP3v3_UPC_XA_LDO.
Replaced only this CD3215
NOW BOTH usbc ports are THE SAME
20v, 0.00A
This was before I replaced U7000.
After replacing U7000
Usbc Master 20v 0A
Usbc Secondary restarting---this is the original condition.
Replaced BOTH because I must conclude there was electrical insult.
Now BOTH 5v with chinese CD3215. CD3215C0068AQ4CW
I will change CD3215 with stock from Louis and report back
My goal was to give as much history as possible.
Copy/paste from above: I searched forum and read posts. Learned that step one is make both usb c ports the same.
Diode mode of LDO rails showed a short on PP3v3_UPC_XA_LDO.
Replaced only this CD3215
NOW BOTH usbc ports are THE SAME
20v, 0.00A
This was before I replaced U7000.
After replacing U7000
Usbc Master 20v 0A
Usbc Secondary restarting---this is the original condition.
Replaced BOTH because I must conclude there was electrical insult.
Now BOTH 5v with chinese CD3215. CD3215C0068AQ4CW
I will change CD3215 with stock from Louis and report back
Victor Holley
Member
3215 replaced again.
USB port"A" back to 20v
USB port "B" shows 5v, 20v then restarts and repeats.
USB port"A" back to 20v
USB port "B" shows 5v, 20v then restarts and repeats.
Usually board restarts when tries to boot and a problem is detected in a secondary power supply.
See what happens in SMC bypass.
Check for short on any big coil.
See what happens in SMC bypass.
Check for short on any big coil.