Pumpkin Problem - Android Head-Units

After approx 20 minutes screen goes crazy and crashes.
Overheating?
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Probably. I once had to rewire a DVR built into a cabin mirror - it wanted to see +5v on its MicroUSB jack and I already had +12v on the barrel plug that I had rewired for another DVR previously and I didn't feel like wiring any more cables into the car. Since I needed to drop +12v down to +5v I opened up the mirror and soldered in an LM7805 voltage regulator in a TO220 case. Lo and behold, w/o a heat sink once the VR started heating up the LCD would go fuzzy, show coloured stripes and eventually crash.
I desoldered the VR from the PCB and soldered in a DC-DC converter instead. These converters consume very little current and can be had for around a buck a piece on ebay from China. No problems with the LCD since then. HTH.

Could be lose wire in the unit. Mine does that, but usually doesn't crash. Is the screen too hot to touch? Mine will get that hot and still work.

Related

Maze Alpha won't charge with new lead (SOLVED)

Hi guys, so after reading another thread on here I managed to get my phone charging. Like others I managed to catch the lead while charging and it damaged the USB-C plug on the lead, just enough so that (at first) it simply wouldn't charge. I managed to get charge by forcing the lead in a touch and having in the "right place" and of course, not touching the phone while it charges. I also wanted another lead so I could charge in the car.... but of course, it also doesn't work if the USB-C lead is plugged in upside down (sic)
I purchased replacement leads thinking the first was broke, the next didn't work either.
This is as some have pointed out because the USB-C socket on the Maze Alpha is sunk in further by about 1 mm. So no standard made lead works.
SO I took one of the other leads and trimmed off about 1mm of the rubber/plastic (See red line on image)
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Image link : https://ibb.co/kmD0QK
and it works perfectly. So I trimmed my existing official Maze Alpha lead and that also works perfectly now too.
Of course, if you wish to do this, don't buy one that has a metal shroud or surround on the base of the plug. Please also be careful not to cut yourself.

Blown Power Management Chip on 8227l Unit, maybe even fire hazard...

Today I was playing around with my newly purchased generic 8227L A10(fake) device, the flat ones with 9/10 inch touch buttons only.
And then device suddenly rebooted, a pop sound, screen went black and then a bit of smoke came out and smelled ... well like burned electronics smell.
Opened the device and found this (take a look at the chip in the center, if I encrypted the remains correctly that's a power management chip).
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When connecting to power, device starts smelling again, so chip will probably burn it's way through the board...
Edit: yep connected it back and it lit up like a orange led, didn't stop either, after 1/4 of the chip was burned my power supply cut of due to overcurrent. the boards main fuse never blew up...
Not sure what to make of it but I'll definitely change the wiring or add a hardware switch to my other Chinese Android Headunits so they are completely turned off when I leave the car.
Just wanted to share this info as, maybe it's just a one off kind of hardware flaw or maybe not and you just have to trigger your unit it in some way to blow it up.

Junsun - improving WIFI reception with external antenna

I own Junsun Android radio with standard I would say pinout on the back. Noticed that there is a pin for external WIFI antenna.
Has anyone tried this pin and installed external WIFI antenna?
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Hi,
you shold receive a small plug with your head unit. Its video RCA cinch and there are also two blue wires circa 3cm long. One is wifi antenna, the second is forBT.
wotii098 said:
Hi,
you shold receive a small plug with your head unit. Its video RCA cinch and there are also two blue wires circa 3cm long. One is wifi antenna, the second is forBT.
Click to expand...
Click to collapse
that is great, I was just going to post it, realized this last night.
The question I have: how do you connect commercial antenna with two part ( main conductor and shielding ) to this one wire?
@wotii098
should I solder the blue cable to the center pin of the WIFI antenna?.
should the shielding be connected to the pin 9 ( GND ) ?
I didnt connect(or solder) antything to these wires. I just use them as they are and I can't complain about wifi/BT range.

Help for possible installation!

How can I connect the connector in blue photos with the certhiato photo 2 connectors? This is to use the original MIC Tiguan Many thanks !!
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You should have the right connector to your head unit, mostly provided with ISO connectors for Power and speaker.
There you need an adapter from ISO to Quadlock. Search for your car... BTW: for VW you also need a CAN adapter to get clamp 15 and SWC working.
If you don´t have anything... Get in contact with the seller, ask for the right adapter cable or send this thing back.
rigattoni said:
You should have the right connector to your head unit, mostly provided with ISO connectors for Power and speaker.
There you need an adapter from ISO to Quadlock. Search for your car... BTW: for VW you also need a CAN adapter to get clamp 15 and SWC working.
If you don´t have anything... Get in contact with the seller, ask for the right adapter cable or send this thing back.
Click to expand...
Click to collapse
Very Thankss! now search...

Jonsun 1G Can Bus connections

Hi,
I just unboxed the Head Unit for my Ford Focus MK2 and found that the wiring does not look like the very simple diagram on the sellers page.
Going from the can bus connector there are 2 wires to a white plug. One wire is green/white and one wire is white/green. I am in doubt where to connect this plug.
Further, from the can bus there are two wires going to the head unit. Its a red wire and an orange wire. The wires are split and connects to a plug. From the plug that is supposed to connecting to the car there is a socket with a red and orange wire. I am in doubt what happens wether connecting or not.
There is also an orange/brown wire marked Key2
Maybe photo explains better:
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I would appreciate if someone could clarify for me.
Christian
Solved it myself
cl3884 said:
Solved it myself
Click to expand...
Click to collapse
They you may answer your questions here, to help other users.
Thank you.
It need to go in the free slot in the Head Unit but it is not shown on sellers page. There is only one slot that fits so its quite simple when you know.

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