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Hardware Support Vu+ duo2 motherboard repair

bellejt

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just tried with my gmail account and awaithing confirmation.You must be doing something wrong.
 

Piotrekop

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and what, have you logged in? It is also not possible to log into gmail from Poland.
 

bellejt

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already asked the question on the forum for you about the values of the R's
 

Piotrekop

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Divinely. Great. And you can ask the administrator why people from Poland are unable to register?
We are waiting until tomorrow.

He probably means U822

Johnny B. wrote back to you and posted my picture of resistors but I don't know what he means ..
 
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Piotrekop

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I understood as if J.B. objected that the same question was asked in another forum ...
 

John-2k10

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@Piotrekop

As i already had given on my forum, when you sent me a email with your email address and user name you like, then I could create a account for you.
After done, you should receive a email to activate it, and after that you could/should change the password etc.
 

bellejt

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got answer :

Ah, okay how nice of you.
But yes, somehow, some, could not register on this forum, but can read all the postings on the forum.
And I have no real idea why it is.

In that case when he/see like to register then it could sent a email message to me with the email and forum name it like to use, and then I, or also someone else could also create a account.
It will/should receive a email to activate it, and can afterwards change the password etc.
 

Piotrekop

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Thank you all for your help then. I will write to priv regarding the account on
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. I will inform about the resistance when I receive the message. Maybe it will be useful to someone.

I would like to add that I am replacing all capacitors according to the
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. I do not recommend anyone to do this. Cruelly difficult and very hard work. If I had known, I wouldn't be doing this.
 

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Piotrekop

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"Here it is...
R122=0 Ohm (zero ohm resistor mainly used for bridge or protection/fuse).
R123=0 Ohm
R124=33 Ohm (33.4 Ohms)".
 

bellejt

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it would work but do not know if it should be 603 or 805 .Only differance is that 805 is larger in size
 

Piotrekop

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Hi,
I want to ask you for help again. I'm still repairing the Duo2 motherboard. The problem is similar to the previous one, but this time it is not a resistor but a capacitor. I found no capacitor on the board. Designation C820. I attach a picture. Can you help me determine the parameters of this capacitor?
Thanks,
 

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Aliraza63

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Hi,
I want to ask you for help again. I'm still repairing the Duo2 motherboard. The problem is similar to the previous one, but this time it is not a resistor but a capacitor. I found no capacitor on the board. Designation C820. I attach a picture. Can you help me determine the parameters of this capacitor?
Thanks,
Its Johnny's field only he can reply
 

protox

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I have a problem with the white LED in Duo2. All the voltage in the motherboard is basically the same as given on the "Johnny B" forum, except for a few activated from the processor (Enable). But my bootstrap isn't working. Only the Rs232 port is active. Unfortunately, as my compatriot, I am from Poland and I cannot register on the website of an expert in this field, Johnny B, and ask him what to do next. Could someone from this forum help me with this? Thank you in advance.

Regarding my problems - I observed with an oscilloscope that there is no waveform on the quartz of the 54MHz processor. Should it be that way ? The processor is slightly warm. The current consumption from the external 12V power supply is approx. 0.6A.
 

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