Re: Fox 32DLE250 startup loop
Sorry I have never encountered a problem like this (with eeprom) can you explain how to freeze eeprom?
Thank you.
Morsus
Senior Member
Last Activity: 10-04-2017, 03:18 PM
Joined: 11-15-2016
Location: Zrenjanin
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Re: Fox 32DLE250 startup loop
Sorry about not explaining better. So when I plug it in it shows the FOX logo for like 5 sec and after that screen goes black and red led diode lights up for also a few seconds. This process repeats.Leave a comment:
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Re: Central lock car key
If I remove the transistor should I jumper connect the remaining contacts?Leave a comment:
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Fox 32DLE250 startup loop
Hello folks, I layed my hands on FOX 32DLE250 TV which is stuck in startup loop. I opened it up thinking its an board problem. I have checked every cap and transistor there is and it all turned up to be absolutely fine nor there are any damage marks.
I googled this problem and found that it could be a firmware fault. I've found that there is a full reset pin on TV boards but I can't seem to find it on this one. Also I tried to reinstall/repair firmware with USB stick but nothing new happened. Anyone had a similar TV problem?... -
Re: Central lock car key
I have just noticed the 5th pin of the ic should be but isn't connected to the SW1 and I connected it with a jumper, so that is fine now. And also the Q1 pins are shortened like on the picture. Is this good or bad?
Thank you so far....Leave a comment:
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Re: Central lock car key
Okay I took it off. Here is the image. Had some trouble soldering it back since the SW pins are so short they can barely get through the half of the board. (less than 1mm)...Leave a comment:
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Re: Central lock car key
The connection was bad and I soldered it a little bit better so its fine now. ic pin1 is connected to the ground.
Nope, not any of the diodes - any side.
This is correct. There is a connection between the points marked with the arrow.
Should I connect the marked pin on not-existing C6 to the D2 via jumper or something like that?...Leave a comment:
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Re: Central lock car key
Okay I did my best to make it as prettiest as possible xD
The big mess at to top actually does not have contact with huge track above it witch Image 2 proves.
The problem is that I have no idea where track on the Image 3 leads to. :/
Edit: The broken track on Image 3 is actually okay, just protection layer came off and its connected to the D2.
Tried it again, no blinking.
I added an image 4 where you can see all +12V readings while negative lead is on the battery....Last edited by Morsus; 06-15-2017, 05:49 AM.Leave a comment:
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Re: Central lock car key
Oh I see it. Just can't figure out where should the upper (thin) line lead to? Second pin of the SW3? (Image1)
Yes
It is glue-fixed to the board...yeah yeah I know xD
Red one is SW4
Not replaced, just glue mess, should be fine :/
The replaced SW should be SW1
I am not really sure. It could be but the owned would probably notify me about that....Leave a comment:
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Re: Central lock car key
This is what I had in mind. But I am not really sure about the damaged tracks. I can't really figure out witch ones are damaged and witch ones should not have contact. :/
eccerr0r: Yes, I would focus on getting the LED to blink....Leave a comment:
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Re: Central lock car key
Of course the same thing I have said. One of the switches (SW1) was broken, and he replaced it but messed up the board. LED does not blink at all.Leave a comment:
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Central lock car key repair
Hello folks.
My neighbor asked me if i can see whats going on with his central lock and alarm car key. He told me he tried to fix it himself but he actually made a mess. So the board contacts are ripped off on some places and I have no idea what should be connected and what shouldn't. I am guessing some of you already knows these small circuits and if you could give me a hint that would be great. So, all of the 4 micro switches work fine. Battery (12V) works too. It's just circuit connection problem I guess. The funny thing around SW3 is actually glue (he used it to fix the switch in the... -
Re: Inductor check
Wow, I was sure I uploaded the pictures. Sorry about that :/
Here they are (:...Leave a comment:
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Inductor check
Hello again folks.
I found an might-be-broken inductor in my Fox TV. I have 0 experience with inductors and don't know how to check it. It looks like its broken. When I placed it in my ESR meter it shows that it is an inductor (witch means it should be working) but the values measured don't match the one written on it. (or at least I don't know how to read them). Here are the pictures.
Also, the resistance on it is varying very much until it gets close to zero when I check it with my multimeter. -
Re: Identifying burned SMD resistors
Yes, same value in the [URL="http://www.hobby-hour.com/electronics/3-digit-smd-resistors.php"]table [/URL].
I understand now, thanks.
Markings on SMPS IC are UC3844A DP4J0100 which is probably this:
[url]http://pdf1.alldatasheet.com/datasheet-pdf/view/25565/STMICROELECTRONICS/UC3844A.html[/url]
Is there a way to test these to see if its broken or not? (I would love if not
)Re: Identifying burned SMD resistors
Yes, same value in the [URL="http://www.hobby-hour.com/electronics/3-digit-smd-resistors.php"]table...Leave a comment:
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Re: Identifying burned SMD resistors
I am still not sure witch element is that. I googled it but cant find anything similar. Sorry :/Leave a comment:
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Re: Identifying burned SMD resistors
Sorry I am a bit new to all of this, SMPS IC?
1R3 would be 1kOhm right?
Could all 3 resistors be the same or as gabiz_ro said could be one with different value?
Will take out and check the MOSFET in the morning, I will let you know.Leave a comment:
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Re: Identifying burned SMD resistors
I just checked and I get 0 resistance between any of 3 MOSFET pins aka short circuit. Could it be that the MOSFET is blown too?
The charger was probably on rain or something like that so it shorted out or similar.
Here are the pictures....Leave a comment:
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Identifying burned SMD resistors
Hello folks, respect to everyone.
I got a electric bicycle charger which got wet and died. After opening it I found some SMD resistors burned out. Here are the pictures. I want to replace these but I can't figure out what its written on them. My guess is "123" (this should be 12kOhms right?) but i'm not sure. I'm still not sure where can I find the exact new ones but if I don't is it much of a problem if I replace them with ones with similar values?
Thank you.... -
Re: Cannon IP4300
I have already tested the logic board caps (pictures 2-5) and all were very close to their initial value so must be good but still didn't check the mosfets. I see only one mosfet on that board and it's a 8pin on the very right side of the board (picture 4). Will check that tomorrow. Voltages of the power supply are about 10V witch is 1/3 of the actual voltage that should be outputted. Witch means the board is still in "sleep" mode and is not receiving the signal to "wake up".Leave a comment:
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