TS101 only working in QC mode with PD3.1 Powerbank about ironos HOT 21 OPEN

QC cant do 28V (Spec only goes to 20V); so what is likely happening is that the PD profile is "stuck" and so therefore PD negotation fails and we assume its QC.

To force QC you set PD timeout to 0

from ironos.

Thank you for your quick reply.

I tried setting the PD timeout to OFF (0 not selectable, lowest is 1 on my build) with no apparent effect.
The TS101 still cycles through the voltages from 5 to 28 displaying PD 28.6V in the end with the same problem occurring.

If it sporadically ends up displaying QC with 28V it functions as intended pulling peaks of 80-100W as indicated on the iron as well as on the powerbank. So it seems to utilize the full 28V even though it assumes it´s on QC mode.

Any advice on how to investigate this problem further?

from ironos.

Any advice on how to investigate this problem further?

Absolute best step is to get a capture of the USB-PD packets being exchanged to debug what is going on.

otherwise next best is to boot up the iron holding the rear button to start the PD debug menu that should show what options your power supply is advertising, and make sure all advertised options match the label.
This will also show a state number that can be used to trace where its getting to in negotiating USB-PD

from ironos.

Unfortunately tracking the PD packets is out of reach for my expertise and equipment.

The PD-Debug Menu seems to show nohing unexpected either. Maybe you can spot something strange:
After negotiating it shows the following in the PD-Debug menu:
State 12 No VBus
1 5V 3.00A
2 9V 3.00A
3 12V 3.00A
4 15V 3.00A
5 20V 5.00A
6 3-21V 5.00A
8 28V 5.00A

Only thing odd is that that the "State 12 No VBus" display flickers every 5-10sec, and displays "State 2 No VBus" for a fraction of a second (litterally 1/10th of a second) before rerutning to State 12.

Something else i discovered is that starting to heat immediately after plugging in the Iron, greatly increases my chances of it functioning "normally" while displaying the odd QC 28V. It seems that starting to preheat before PD is finished negotiating greatly improves the chance of working.

Also note that it only shuts off and reboots while heating. Also the power pulse can trigger the reboot if set too high (i lowered it to mitigate that problem)

Any further advice?

from ironos.

I have a newly purchased TS101 (90W). I am experiencing similar symptom of iron rebooting while heating up on 140W Apple PD3.1 brick with EPR lead in 28v mode. This happens with V2.22, I haven't tried older firmware.
If I try another apple brick that only does 20v 5A, issue does not reproduce.
Issue also does NOT reproduce using stock firmware.

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