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Deze versie is geschreven door: Minho ,

Tekst:

Alright, you have a lot stuff in this in this question so let's attack it one by one.
 
* Have you checked FL1166? It is also important.
 
* FerriteFerrite Beads, or Filters, are supposed to measure 0 Ohms when measuring in DC. They They will get resistive as the frequency increases...that is essentially what they are designed to filter; high frequency noise. So if you are testing continuity on filters with your multimeter, it should read a dead short. IF you are seeing any resistance, then the bead may be bad.
* FerriteFerrite Beads, or Filters, are supposed to measure 0 Ohms when measuring in DC. They They will get resistive as the frequency increases...that is essentially what they are designed to filter; high frequency noise. So if you are testing continuity on filters with your multimeter, it should read a dead short. IF you are seeing any resistance, then the bead may be bad.
 
* Your VCC_MAIN seems low. If the device is plugged into a charger, VCC_MAIN should be ~4.2V. If it is battery powered only, then it should be at the same voltage as the battery.
* Jumping pins 1 and 2 of U2301 (with U2301 removed) allows full VCC_MAIN voltage to get to the cameras. This may have damaged the cameras further. U2301 is a buck converter who's purpose is to take VCC_MAIN and regulate it down to 2.85V.

Status:

open

Origineel bericht door: Minho ,

Tekst:

Alright, you have a lot stuff in this in this question so let's attack it one by one.

* Have you checked FL1166? It is also important.

*  Ferrite Beads, or Filters, are supposed to measure 0 Ohms when measuring in DC. They will get resistive as the frequency increases...that is essentially what they are designed to filter; high frequency noise. So if you are testing continuity on filters with your multimeter, it should read a dead short. IF you are seeing any resistance, then the bead may be bad.

* Your VCC_MAIN seems low. If the device is plugged into a charger, VCC_MAIN should be ~4.2V. If it is battery powered only, then it should be at the same voltage as the battery.
* Jumping pins 1 and 2 of U2301 (with U2301 removed) allows full VCC_MAIN voltage to get to the cameras. This may have damaged the cameras further. U2301 is a buck converter who's purpose is to take VCC_MAIN and regulate it down to 2.85V.

Status:

open