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Joined Nov 2010
1,545 Posts
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Joined Jan 2013
2 Posts
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808 11 HD KeyChain not working
Hi to all,
I have problem with my camera 808-11-HD-Lens-DVR-Car-Keychain..., it`s only red LED working and nothing else. So, the cause for not working is the fact that the CAM was accidently forgotten in the pocket in one of my clothes and put into the washing machine... After being washed i took out of housing the PCB and dry it, and after that the CAM worked normaly. But not for long, after 3-4 days it has stop working, only red LED "on" when on USB... Status: - only red LED on when on USB(battery Charging status, when battery full - LED "off") - when on USB, the device or SD storage not recognized by PC, nothing happens - LiPo is normaly charging when conected on USB - voltage seems normal on PCB, on USB(4.88V), uSD (3.30V), IC`s (1.8-3.30V) History on what had been done so far: - all kind of combinations for "start-up", "ON"..., "reset then ON",... etc - uploaded firmware FW96630A.bin (bought new same camera and uploaded same firmware, and CAM is working normaly) - bought "WINBOND W25Q16BVSSIG" eeprom and replace it with the procedure described on http://g--labs.blogspot.com/ site I don`t have any idea anymore what else to try, so i kindly ask you to give some hint or solution, or maybe similar expirience because the CAM still not working... Best regards, Matic |
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Joined Sep 2012
4 Posts
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I have a 808 car key micro camera #16. I don't know how to access the configuration tool that the manual says it should have. I don't know how to adjust the correct time and date as well as the volume setting. I would appreciate any help in order to be able to fix my camera settings. Thanks in advance.
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The #16 thread - read the first post, and faq that follow
MikeQuote:
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Joined Nov 2010
1,545 Posts
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If the firmware was running, even partially, you should get some indication of life. The red LED is controlled by the charger IC so has nothing to do with the rest of the circuit. At least it shows that the charging IC is working. What happens without the lens ribbon cable connected? Still nothing? When you connect the camera to the PC, does it get briefly recognized. It should, even if all the circuitry isn't working properly. So long the yellow LED doesn't even blink, I suspect a hardware failure or corrupted firmware (in the SPI). You can measure most of the resistor and capacitor values on the board, but a few you will have to desolder to check. You can also check the transistors for short circuits. And are you sure you programmed the SPI with a valid dump? I haven't tried it, but there are also three RS232 solder points on the board. The TX might give you additional information, but only if the firmware is running. There is also a slight possibility that the CMOS module/cable is defective. If you have a spare module it would be easy to check. |
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Austria
Joined Jan 2004
3,433 Posts
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Do you have a picture of these points ... I would be curious to see what it show on serial port
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Joined Nov 2010
1,545 Posts
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Like I said, I haven't tried this on the new design. On the original #11 the points were situated at the edge of the board next to the processor. On the new design there are three points, instead of four, next to the processor. These look suspicious and could well be TX, RX and GND. If you have a TTL to RS232 converter you could try hooking up the TX (I'm sure it's one of them) and a ground point.
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Joined Jan 2013
2 Posts
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. Regarding valid dump - it`s a great chance that the dump is not right one, tomorow when i go to work if there will be some free time i will use company profesional equipment and do some measurements... also remove ribbon cable and give it a try, and when pluged into USB there is no even so small indication of any activity, no blink of a LED, no PC status of a new device,... nothing at all. So tomorow if any free time, new measurements, for now i will paste some images of a module and those 4 pads for RX-TX levels...![]() ![]() ![]() ![]() Best Regards, Matic |
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Austria
Joined Jan 2004
3,433 Posts
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Here is my latest video from my #11
Now that I did find a good vibration free platform ... I think it is still quite good the #11 for his job.
As camera for feed my Video TX I'm using this ... http://www.hobbyking.com/hobbyking/s...mp_420TVL.html ... it is as heavy as an AV cable from #18 to a video TX ... so ... not a big change Tchuss e_lm_70 |
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Joined Nov 2010
1,545 Posts
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Unfortunately I can't remember what happens when the ribbon cable is removed, but I remember I had a terrible struggle to remove the cable from one of my cameras since the cable was additionally glued to the board! Most of the problems with the early #11s was due to a defective ribbon cable / contact, but your problem is different in that your camera suddenly stopped working after the water damage. If you want, you can send me your dump and I'll try and verify if it's valid. You can also do this yourself if you have the different firmware versions and bootloaders. As you may be aware, the firmware is appended to the bootloader in the SPI dump. I doubt very much that you will be able to source a spare lens module, and I doubt that an adapter for the new lens modules exists - if it did, that would be more than cool! |
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