Duex hadrware problem - FAN/LED7 output not switching

developerOI

Hi

I'm using a DueX PCB. It's a new board and I'm noticing that it doesn't switch the output FAN/LED 7. It's always shorted to GND. I've tested my printer with another, fresh Duex and it' fine with that one. The problematic board doesn't respond to M42 P27 S0/1, the output doesn't change its state.

droftarts

@developerOI Is this the same board as your other thread? https://forum.duet3d.com/topic/35266/duex-hadrware-problem-driver-5-not-working
Again, need to see your config.g, response to M115, and ideally a picture of the board to see how jumpers are set etc.

Are you running a fan or LEDs from this output, and how is the Fan Voltage jumper set, ie VIN, 12V or 5V? There is a current limit that you may be exceeding if you are running a lot of LEDs on the fan headers.

Ian

developerOI

I have RepRapFirmware published by Duet3D, which is Duet2CombinedFirmware.bin. M115 in my terminal prints:

FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 2.05 ELECTRONICS: Duet Ethernet 1.0 or 1.01 + DueX5 FIRMWARE_DATE: 2019-12-13b1<LF>

To simplify the situation, I've made a basic config just to control these pins:
M106 P7 S0 I-1 ; Disable Fan7
M106 P8 S0 I-1 ; Disable Fan8

All of those outputs are left unconnected. I'm checking Fan7 output and Fan8 for comparison, I measure voltage on pins using a multimeter. Fan8 switches correctly, Fan7 always stays on. I'm switching them using commands:
M42 P27 S0<LF> ;Fan7
ok<LF>
M42 P27 S1<LF>
ok<LF>
M42 P28 S0<LF> ;Fan8
ok<LF>
M42 P28 S1<LF>
ok<LF>

The jumper is in position: VIN.
I'm including two pictures

Best Regards

Phaedrux

@developerOI said in Duex hadrware problem - FAN/LED7 output not switching:

FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 2.05 ELECTRONICS: Duet Ethernet 1.0 or 1.01 + DueX5 FIRMWARE_DATE: 2019-12-13b1<LF>

Is there a reason for using such ancient firmware?

developerOI

We use this firmware because we already have a system built upon it and we don't want to change it when it works well. The situation is not dependent on firmware. The exact same version goes on other printers and this FAN output operates correctly.

Phaedrux

@developerOI said in Duex hadrware problem - FAN/LED7 output not switching:

I've tested my printer with another, fresh Duex and it' fine with that one.

When and where was the Duex purchased? A warranty replacement seems in order if it's within the time frame.

developerOI

@Phaedrux it was purchased directly from Duet3D.
Date: 08.01.2024
Invoice number: INV-2489

Phaedrux

Please send an email to warranty@duet3d.com and CC your reseller. Include a link to this forum thread and the details of your original purchase. You'll receive a reply with a form to fill out.