<p>The pictures don't help much, and I don't know the board. But if it is as described here, <a href="http://www.elecfreaks.com/wiki/index.php?title=RAMPS_Melzi" rel="nofollow noreferrer">Elec Freaks Wiki - RAMPS Melzi</a>, then you need to look for the FTDI Chip FT232. The reset is caused by the DTR Signal. There needs to be a copper trace from pin 2 to the capacitor and then to the jumper. From the jumper a trace leads to pin 4 of the Atmel ATmega.</p>

<p>If it is a clone, the jumper might have been "optimized away". If so, desoldering the capacitor gives the same result.  Be certain to desolder the right one. If unsure keep the capacitor and solder it back in if it was the wrong one.</p>

CC BY-SA 3.0
2016-08-05T00:34:49.273Z
2017-02-13T01:03:21.910Z
2017-02-13T01:03:21.910Z
Lars Pötter
<p>I'm having some issues when connecting to the printer via USB, see <a href="https://3dprinting.stackexchange.com/questions/1588/wanhao-i3-plus-restarts-when-connecting-usb">Wanhao i3 PLUS restarts when connecting USB</a>. </p>

<p>After some research I thought I would try to remove the <code>auto-reboot</code> jumper. Now that the i3 Plus uses a custom board instead of the standard Melzi, I'm not sure where to find it. </p>

<p>See pictures attached:</p>

<p><a href="https://i.sstatic.net/4C5tg.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/4C5tg.jpg" alt="Closeup of Prusa i3 Plus custom board #1"></a></p>

<p><a href="https://i.sstatic.net/7K7aM.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/7K7aM.jpg" alt="Closeup of Prusa i3 Plus custom board #2"></a></p>

<p><a href="https://i.sstatic.net/PL2gW.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/PL2gW.jpg" alt="Closeup of Prusa i3 Plus custom board #3"></a></p>

<electronics>
Where is the auto-reset jumper on the Wanhao i3 PLUS?
JRomero
# Where is the auto-reset jumper on the Wanhao i3 PLUS?

(Asked by: username_0 on 2016-08-04)

I'm having some issues when connecting to the printer via USB, see [Wanhao i3 PLUS restarts when connecting USB](https://3dprinting.stackexchange.com/questions/1588/wanhao-i3-plus-restarts-when-connecting-usb).

After some research I thought I would try to remove the `auto-reboot` jumper. Now that the i3 Plus uses a custom board instead of the standard Melzi, I'm not sure where to find it.

See pictures attached:

[![Closeup of Prusa i3 Plus custom board #1](https://i.sstatic.net/4C5tg.jpg)](https://i.sstatic.net/4C5tg.jpg)

[![Closeup of Prusa i3 Plus custom board #2](https://i.sstatic.net/7K7aM.jpg)](https://i.sstatic.net/7K7aM.jpg)

[![Closeup of Prusa i3 Plus custom board #3](https://i.sstatic.net/PL2gW.jpg)](https://i.sstatic.net/PL2gW.jpg)

**Tags:** electronics

---

## 1 answers

### Answer by username_1 on 2016-08-05. Score: 2

The pictures don't help much, and I don't know the board. But if it is as described here, [Elec Freaks Wiki - RAMPS Melzi](http://www.elecfreaks.com/wiki/index.php?title=RAMPS_Melzi), then you need to look for the FTDI Chip FT232. The reset is caused by the DTR Signal. There needs to be a copper trace from pin 2 to the capacitor and then to the jumper. From the jumper a trace leads to pin 4 of the Atmel ATmega.

If it is a clone, the jumper might have been "optimized away". If so, desoldering the capacitor gives the same result. Be certain to desolder the right one. If unsure keep the capacitor and solder it back in if it was the wrong one.


---

