Author Topic: Youyue 858D+ some reverse engineering + custom firmware (Read 419394 times)

bitseeker · « **Reply #300 on:** May 05, 2016, 09:48:23 pm »

It's not so hot here, so I'm not sure. At this price/quality range, I would not rely too much on anything being significantly better or worse. It could change in the next production run.

spinkidiver · « **Reply #301 on:** May 05, 2016, 10:42:17 pm »

good, thanks

.
I can see two models yihua 8786D.
1) http://www.amazon.com/dp/B015ODWOJC/ref=twister_B015ODWO6U?_encoding=UTF8&psc=1
2) http://www.amazon.com/YiHUA-8786D-Display-Rework-Soldering-Station/dp/B00O40NO50/ref=sr_1_2?ie=UTF8&qid=1462487625&sr=8-2&keywords=yihua+8786d
Wich is the original? the first one or the second one? the difference is the logo logo CE, 1 in the right and the other in the left.

bitseeker · « **Reply #302 on:** May 05, 2016, 11:26:45 pm »

I'm not sure. It's really hard to tell with these things. They could both be fakes or just different batches or something in between. Some people have even received devices with a different name or different microcontroller, but functionally the same thing.

Sorry I don't have more definite information. This market is just so crowded with variants that anything is possible. Amazon is pretty good about returns, though, in case you are not satisfied. But verify what return policies apply in your country.

happydad · « **Reply #303 on:** May 17, 2016, 08:55:32 pm »

Hi Madworm,
I am thinking of adding a perf board to do the BLDC fan speed mod, and am trying to clarify some connections. Looking at the fan-speed mod schematic, is the input (I_BLDC) connected to the pig-tail resistor attached to the upper right side of the main board? And I'm assuming v_out goes to pin28 of the Atmel?
Thanks in advance.

madworm · « **Reply #304 on:** May 23, 2016, 10:10:45 am »

You'll find more info here: http://blog.spitzenpfeil.org/wordpress/2015/10/23/youyue-858d-hotair-station-bldc-fan-speed-mod/

Mostly images.

mixih · « **Reply #305 on:** May 28, 2016, 08:41:29 pm »

Hello everyone,

Recently, I bought a Youyue 858D in the hopes of applying this mod to it. Only problem is that the internals don't match. Like kcbrown, I have a one sided board with the MK1841D3 processor. The board layout looks very similar to the Kaleep. I'm wondering whether they changed the insides or if this is just a re-branded Kaleep. Is there anywhere I can get the original with the Atmel?

Edit: The board revision is 858D04.PCB 2015.08.21

bitseeker · « **Reply #306 on:** May 28, 2016, 10:02:31 pm »

Is that the LED display that looks like it's not even soldered on?

mixih · « **Reply #307 on:** May 28, 2016, 10:26:22 pm »

Yes, that is. It seems to be soldered on the reverse side.

bitseeker · « **Reply #308 on:** May 28, 2016, 11:21:57 pm »

Yeah, just looks funny. Single-sided board and really long leads left on.

Tausif36198 · « **Reply #309 on:** June 04, 2016, 01:18:10 pm »

Hi sir I have quick 858 D so my hot gun not work display not work total hot gun death haw this repair

doctormord · « **Reply #310 on:** June 05, 2016, 03:42:03 am »

Change fuse?

Tausif36198 · « **Reply #311 on:** June 05, 2016, 12:59:00 pm »

Sir , fuse is OK sir 858D04 PCB new available .and haw many programing IC in PCB .and haw to programing system and software.

Tausif36198 · « **Reply #312 on:** June 05, 2016, 01:40:35 pm »

Sir, I have quick 858d 220 volt my machine fuse OK .I check PCB components remove n check found OK .now display is showing nothing and machine is not working..5 volt supply is taken by IC..so guide me about that it's hardware problem or programing problem.. I have no programing tool to ...so gudie me what should I do to repair my machine.

bitseeker · « **Reply #313 on:** June 05, 2016, 10:49:22 pm »

Are all the power supply output voltages correct? If not, then the problem may be the power supply or something after the power supply causing the voltage to be incorrect (usually lower than what it should be).

Did I read correctly that you removed and checked all the PCB components? All of them?

Tausif36198 · « **Reply #314 on:** June 06, 2016, 03:00:52 am »

Sir, My means I will try to 5volt power supply directly to all PCB IC spark the circuit no PCB line damage it's OK. My machine ic( mk1841D3c1y21535) this is a programable ic?I think so IC program is empty? Haw many programing IC in PCB board. and sir system to program details .

bitseeker · « **Reply #315 on:** June 06, 2016, 03:09:27 am »

If you recently purchased this and the IC is empty, you should return it.

I don't know how to program that IC. Read the old posts here about how others modified their machine. I don't remember if anyone programmed it or replaced it with an ATmega.

Tausif36198 · « **Reply #316 on:** June 06, 2016, 03:19:57 am »

No sir this is machine company ic

Tausif36198 · « **Reply #317 on:** June 06, 2016, 05:01:14 am »

Sir can I purchase 858D Mk 1841DAtmega328p IC board online .In INDIA .purchase details plz sir.

bitseeker · « **Reply #318 on:** June 06, 2016, 07:14:28 am »

You can check the earlier posts in this thread for more information. The board is made by forum member wguibas, so you may want to check with him if he has any more boards available.

Tausif36198 · « **Reply #319 on:** June 06, 2016, 08:51:21 am »

Sir 858d display work anode or cathode working position

bitseeker · « **Reply #320 on:** June 06, 2016, 05:36:06 pm »

I don't have the same model as yours. Some ways to find out:

1. Turn it on and use a multimeter to see which way it is.
2. If there is no power to the display, follow the traces on the PCB to determine how it's configured.

Tausif36198 · « **Reply #321 on:** June 13, 2016, 05:06:28 am »

Sir can I purchase 858D PCB board in INDIA online ? Website name plz post immediately plz sir.

bitseeker · « **Reply #322 on:** June 13, 2016, 07:02:59 am »

I don't know. You'll have to look through the messages here to contact the person who made the PCB.

mixih · « **Reply #323 on:** June 16, 2016, 02:17:00 pm »

Ok. Just bought another one from a totally different seller. It also had that MK1841D3 chip. As @kmlee posted, I think they've switched to this design.

Oh well. Is there such a thing as a "Fake" YOUYUE?

Gixy · « **Reply #324 on:** June 16, 2016, 04:16:54 pm »

For the rework station with MK1841D3 chip, the adaptation board of Wayne (wguibas) works perfectly with the software of madworm.
Unfortunatelly the calibration and the PID parameters are not adapted for the 230V version. I have to work on it as soon as I have time...


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Author Topic: Youyue 858D+ some reverse engineering + custom firmware (Read 419394 times)

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