[Solved] Navitel T700 3G - Displays the message "Too high charging voltage"

I have a small problem with the Navitel T700 3G tablet hardware, and more precisely with the charger and service.

After several (about 8) hours of operation in the truck (24 V), the message "Charging voltage too high. Disconnect the charger" appeared.

I disconnected it, after some time I connected it, but the effect was similar. I connected another charger and the problem disappeared.

The stairs began when trying to repair (replace) the charger which of the declared 2A can deliver max 460 mA,

and it has power surges.

The website said that I was to send the complete device, I asked the source, i.e. on the Navitel website, and I got it

information that

The procedure proposed by w-support.pl is correct - in the first batch of devices there was a problem with charging the device
- this was resolved with a software update. Therefore, in this type of notifications it is necessary to send the entire set.

For several years I have been dealing with electronics only amateurs and probably I'm not exactly "on the subject"

So I would like to ask if it is possible that in times of standardized USB power supply someone sells devices

with software that does not work with the factory hardware?

Other chargers (12-24 or mains) do not cause any problems.

I have some concerns after reading customer comments or sending the device

which works without any signs of abnormality.

Can anyone advise if the tablet may have a problem with only one charger?

If the problem occurs with one charger, it means it is damaged. I had such a case with the SE K770i phone, when the capacitor in the charger from it was damaged and there was a message that the charger is not original.

nomudrek wrote:

If the problem occurs with one charger, it means it is damaged.

I think so too, but why do the service and the manufacturer say that in the territory of the Republic of Poland there is for sale equipment with defective software that prevents cooperation with the factory hardware and should be sent for update immediately after purchase,
It would not be strange for me if some device did not accept "foreign" chargers,
but that it does not work with the factory and the service necessarily wants to rummage in a working device
is at least suspicious for me

Jacko9 wrote:

charger which of the declared 2A can deliver max 460 mA

It is not the fault of the charger, but of the connecting cable. Contacts D + and D- must be properly connected

Freddy wrote:

It is not the fault of the charger, but of the connecting cable. Contacts D + and D- must be properly connected

Factory charger, cable permanently.
The cable would have to be connected incorrectly during assembly. And the "miracles" started after about 8 hours of work under the voltage of about 28 V.

Jacko9 wrote:

In the event of a factory defect, it would be from the beginning

Not necessarily, it could have got damaged during use.

Freddy wrote:

Contacts D + and D- must be properly connected

Freddy wrote:

Not necessarily, it could have got damaged during use.

Are the contacts switching badly during use?
There is no philosophy. I have no chance of repair or replacement anyway. I will replace the capacitors and test

This 220 uF looks bad.
However, I am puzzled by the behavior of Navitel and service employees who persistently wanted to rummage in the tablet software.

Jacko9 wrote:

Are the contacts switching badly during use?

... how was I supposed to know that you have a permanent cable with a charger? You did not inform about this in the first post.

I informed you that it should be like that, because you also wrote about other chargers. What do you complain about?

Freddy wrote:

I informed you that it should be like that, because you also wrote about other chargers. What do you complain about?

I have no complaints.
In the first topic, I wrote that I connected a different charger and the problem disappeared.
I assumed that the charger went but I wanted to make sure because the website messed me up with this software a bit. In fact, this is not the first time that a device declared as 12-24V does not last. In this case, I thought that since it is a mid-range equipment and not the cheapest travel, it might work.
Apparently I was wrong.

Jacko9 wrote:

This 220 uF looks bad

If it's yellow underneath it, it's not glue and the damage and guts came out of it, then it's rather damaged. Better to invest in some UNITEK, SAMSUNG or BASEUS branded charger

Everything is fine, the charger can be repaired for a few pennies. But if the navigation was under warranty, the warranty is void when the charger is tampered with. The service is always given the whole received. When buying a phone, we get a phone, charger, USB cable, headphones and returning to repair, they must be these 4 things and it doesn't matter that it's only broken 1. I wish that nothing would be damaged in the navigation and that it would not have to be serviced ever.

nomudrek wrote:

I wish that nothing was damaged in the navigation and that it would not have to be returned to the website

A few posts above, I wrote that the navigation is efficient and works normally with other chargers for over a month, so it probably will be fine. I sent a lot of things for repair and it was different about the service requirements, but in this case my vigilance was aroused by a story about a bug. I looked for opinions about this site and found out a lot of interesting things.
As for the conditions of use or the warranty, there is no mention of dedicated power sources.
It is about 5V 2A power supply.
Here I wanted to know if it is possible that the device may have "allergies" to certain power sources.
And even if the navigation fails, you will have to send back the charger, not necessarily the one that was in the box because, unlike devices, they do not have serial numbers. In some cases, chargers, cables and handles are not covered by the warranty.
For now, I will use a replacement and "fight" with the manufacturer. The new charger costs about 40 coins and that's probably why the website wants to repair the navigation under warranty on this fault, and I will rather not risk sending them working equipment, as many reckless customers whose reviews I read did.

After the correspondence was exchanged between the so-called W-Support service, which still required a maniac to deliver the tablet and the manufacturer, Navitel, after receiving photos of the charger interior, decided to send a new one.