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820-01041 - works only with battery

Palhano

Palhano

Member
Only the board on the charger doesn't turn on. It is at 20v 0.08a.

The board with a charged battery turns on. When I connect the charger, it stays at 20v, goes 4a for 1 second and drops again.

I checked all CD3215s and they are OK. In all of them I have the 1.1, 1.8 and 3.3v line.

Just the board on the charger, the voltages on the SLPS2R and AWAKE lines rise and then reset, in a loop.

Any tips?
 
2informaticos

2informaticos

Administrator
Staff member
Test the machine without USB_C meter; connect charger directly to the machine ports.
I saw some of these testers failing.
For this reason I bought 4 different models...
 
2informaticos

2informaticos

Administrator
Staff member
"Just the board on the charger, the voltages on the SLPS2R and AWAKE lines rise and then reset, in a loop."
USB-C meter shows steady 20V/0.08A?
What about PPBUS_G3H and 3V3_G3H_RTC at same time?
All USB-C ports have the same behavior?

Just in case, check resistance over C7020/23 (ohm scale).
 
Palhano

Palhano

Member
Sorry, but I hadn't noticed. but it fluctuates between 0.03 and 0.08.

I have PPBUS_G3H (12.3v) and 3V3_G3H (3.3v) together.

Yes, all USB-C ports the same.

C7020 - 4.7ohms
C7023 - 4 ohms
 
Palhano

Palhano

Member
Did not work. I mounted the logic board on another Mac, it turns on with a charged battery, but it doesn't charge. The board doesn't turn on by itself!
 
2informaticos

2informaticos

Administrator
Staff member
Does it switch to 20V without battery connected?

Post U7000 basic voltages: P_IN, AUX_DET, SMC_RST_IN, VDDA/P, EN_MVR, AUX_OK, A/BMON.
Check them w/ and w/o battery connected.
Also check Q7065 voltages (with battery and charger).
 
Palhano

Palhano

Member
I had 20v, no battery. but during testing, it changed. Now I only have 5.2v and 0a. PPBus dropped to 1v.

I was checking the voltages and disconnected the source, when I connected it again, it was pulling 5.2v. What I managed to measure until I lost 20v.

P_IN - 20v
AUX_DET - 0
SMC_RST_IN - 0
VDDA - 0
VDDP - 0
 
Palhano

Palhano

Member
Sorry, I haven't checked yet. But CD3215 have changed. Do I test the U7000 even with them strange?

I checked the LDO lines in diode mode and all four are OK. But the voltages are strange. I no longer have any of the 1.1v LDO line (with charger in the port for the CD3215). The 1.8v line only appears when I have the charger in the port of the tested CD3215, on the others there is no voltage.

I no longer have the PP3V3_G3H_RTC

I was completely lost.
 
Palhano

Palhano

Member
Now I have some voltages that before, with 20v, I didn't have.

P_IN - 5.2v
AUX_DET - 1v
SMC_RST_IN - 0
VDDA - 5v
VDDP - 5v
EN_MVR - 0
AUX_OK - he is an NC, is that right?
AMON - 0
BMON - 0
 
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