[andyh]

Summary:

1. Both DC converters are functioning as expected. No issues detected with the DC converters.

2. The extension cable is operating correctly.

3. The firmware is working as intended.

4. The dash cam is performing perfectly.

The failure is isolated to an internal short circuit in the DVR connection cable. Seems like factory defect.

Unfortunately I can’t fix it by myself due cable’s proprietary form factor. 😢

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[andyh]

Adiitional video:

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[andyh]

Hence the intermittent failure behavior – the defect appeared/disappeared based on cable bending

[andyh]

The issue has recurred. Further consultation with an electronics expert is required, as my expertise has been exhausted. Omg, i really tired.

Seems like USBC connector has bad soldering quality.

I will back tommorow after full invstigation

[andyh]

I found the problem—it was the extension cable! Just connect the dash cam directly to the DC converter without the extension cable, and now everything works as expected. It seems the service that installed the DVR made the cable too short, causing an improper connection.

Thank you all for your support and help!

[andyh]

Voltage test:

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[andyh]

Here is my full video explanation of the wiring and issue with switching ot Off mode:

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[andyh]

Can you ship directly from the UK via Royal Mail? It should take about a couple of weeks. The seller hasn’t responded to my request for a new cable yet

[andyh]

Hi Hans,

I will contact seller tomorrow.

[andyh]

Should DC converter disable ACC (1) and VCC (2) lines after 25 seconds to 0.00 volts? Or only disable ACC line (1)?

[andyh]

I’ll try to make hard reset and reflash software right now.

[andyh]

My be need just swap VCC and ACC lines?

[andyh]

Does this mean the new DC converter is also defective?

My new converter replaced with my previous, looks the same:

• This reply was modified 2 months ago by  andyh.
• This reply was modified 2 months ago by  andyh.

[andyh]

You right. Check it just now.
From DC:
ACC line = 0.00 volts. VCC line 5.36 volts. Yellow cable is disconnected (in my hand):

>>The power converter should continue outputing 5v for 25 seconds after ignition is switched off.
After 25 seconds converter must drop down voltage for both (VCC and ACC) lines?

• This reply was modified 2 months ago by  andyh.

[andyh]

I conducted a full investigation and even replaced the DC converter with a new one.
As a result, the DC converter is working perfectly. After disconnecting the yellow ACC wire, the voltage on the VCC (2) 5.36 and ACC (1) lines drops to 0.00 volts.

However, the dashcam still starts recording after the Wi-Fi shutdown waiting period (default: 5 minutes). I’m almost certain this is a software issue—the dashcam fails to power off themself completely after the Wi-Fi timeout.

Please verify this behavior on your K6 unit. Pretty sure its software bug and can be fixed at firmware.

• This reply was modified 2 months ago by  andyh.