Duo / DuoLE Vu-duo is Dead
- Thread starter snellie1972
- Start date
You can not replace a regulator with a capacitor. Do not even try to do it.
Does someone know where to find a schematic diagram for VU+Duo
Matrix10
Administrator
Couple of information for those who need it
and know Electronics
Input voltage for all three regulators is abt 5.2 V on input coil s (left from ICs)
The capacity that they have changed is the input capacity (c807)
There is still more capacitors for filtering in input and output.
Oscilloscope is a good base to look at these voltages.
======================================================
Regulators :
output voltage at the ICs output PIN 8
or at the entrance of the filter coil (right from ICs) is
reg 1 >> 2.52
reg2 >> 1.27
reg 3>> 1.32
at the other end of the coil (output)
reg 1 >>2.50
reg 2 >> 1.25
reg 3 >> 1.27
So it is possible to determine by measuring where is the problem
Whether in the main part of power supply or in this dc-dc regulators.
So first measure input voltage to be sure that the issue is not before the regulators.
Do not change / replace components if you're not sure that they are defective.
and know Electronics
Input voltage for all three regulators is abt 5.2 V on input coil s (left from ICs)
The capacity that they have changed is the input capacity (c807)
There is still more capacitors for filtering in input and output.
Oscilloscope is a good base to look at these voltages.
======================================================
Regulators :
output voltage at the ICs output PIN 8
or at the entrance of the filter coil (right from ICs) is
reg 1 >> 2.52
reg2 >> 1.27
reg 3>> 1.32
at the other end of the coil (output)
reg 1 >>2.50
reg 2 >> 1.25
reg 3 >> 1.27
So it is possible to determine by measuring where is the problem
Whether in the main part of power supply or in this dc-dc regulators.
So first measure input voltage to be sure that the issue is not before the regulators.
Do not change / replace components if you're not sure that they are defective.
alaina
Vu+ Newbie
I am sure the regulator reg3 (No3 on photo) is dead (burned). On duo it's marked Pz 1021ai and universal name isAOZ1212 (cf previous post).
I have to remove it and replace it with the 330 uF but I don't know where to weld (souder) the 330 uF (1 pin of the 330 uF at the place of the Vin pin (pin 7) ? and the other one at the place of the fx pin (pin 1) ?. I don't know on wich pins I have to do that. It's a little bit chineze for me.
It should be easier for me if somebody could tell me : sample
Remove the aoz2012
You take the 330 uF and you weld (souder) it at the place of pin 1 and pin 8
connect the pin 4 and 2 and 5 together
I know that for electronician, it may look strange, but for me, it's the only way I can understand.
Thanks
I have to remove it and replace it with the 330 uF but I don't know where to weld (souder) the 330 uF (1 pin of the 330 uF at the place of the Vin pin (pin 7) ? and the other one at the place of the fx pin (pin 1) ?. I don't know on wich pins I have to do that. It's a little bit chineze for me.
It should be easier for me if somebody could tell me : sample
Remove the aoz2012
You take the 330 uF and you weld (souder) it at the place of pin 1 and pin 8
connect the pin 4 and 2 and 5 together
I know that for electronician, it may look strange, but for me, it's the only way I can understand.
Thanks
Matrix10
Administrator
My friend,
You can not replace regulator if it is broken
because simply you do not have experience and knowledge to do so.
You must have also equipment for soldering.
Maybe you can replace only the capacitor and see if the receiver working.
Pay attention capacitor has a plus and minus.
You can not replace regulator if it is broken
because simply you do not have experience and knowledge to do so.
You must have also equipment for soldering.
Maybe you can replace only the capacitor and see if the receiver working.
Pay attention capacitor has a plus and minus.
alaina
Vu+ Newbie
Hello,
Can you post the schema you used to for DIY regulator that converts 5v to 1.25
Thanks
Im also interested in this schema
Dzoni
BH Lover
Hello colleagues !
I have in last 2 months big problem with my DUO.
Started like freeze in working with red light ON. Every day it happen few times. Also happen that stoped working and no anything on display !
I contacted my friend @alpa which had first simular problem and he told me that change capacitors C807.
I made it and change for same capacitor like original - 220uf 16v. It work few days and after again problem.
After that I gave propose to change all 3 capacitors (C807, C814,C850) which are in same line on motherboard but with higher capacity 330uf 16v.
I made it but problem come back after 2-3 days. After it I made test for voltage from PS to motherboard and all values are normal.
Also I measured 3 regulators from @alpa tutorial but it gives normal voltage values.
On the last I made test with pure flash image without any connected on box and without any back up or universes. It work normal few days and same problem start again.
So, problem is HW but I really do not know what I need to do any more. I am tired and dissapointed. If someone have some ideas or same problem which are fixed please write here or if someone have contact from Vu+ engeener which can help in this situation.
All the best !
I have in last 2 months big problem with my DUO.
Started like freeze in working with red light ON. Every day it happen few times. Also happen that stoped working and no anything on display !
I contacted my friend @alpa which had first simular problem and he told me that change capacitors C807.
I made it and change for same capacitor like original - 220uf 16v. It work few days and after again problem.
After that I gave propose to change all 3 capacitors (C807, C814,C850) which are in same line on motherboard but with higher capacity 330uf 16v.
I made it but problem come back after 2-3 days. After it I made test for voltage from PS to motherboard and all values are normal.
Also I measured 3 regulators from @alpa tutorial but it gives normal voltage values.
On the last I made test with pure flash image without any connected on box and without any back up or universes. It work normal few days and same problem start again.
So, problem is HW but I really do not know what I need to do any more. I am tired and dissapointed. If someone have some ideas or same problem which are fixed please write here or if someone have contact from Vu+ engeener which can help in this situation.
All the best !
alaina
Vu+ Newbie
Hi all
The component is not a Pz1021ai but a AOZ1021ai from Alpha and Omega semiconductor. I will try to get one and replace the defective one. I will let you know.
alaina
Vu+ Newbie
Dzoni
BH Lover
Please, if You solved a problem with changing a regulators write it here and I'd asked you to send me the regulators that I try to fix problem, of course I would pay to You for them...I am from south Europe.
angelofsky1980
BlackHole Driver Specialist
I think you must use a 16V condensator and not an high voltage one.
Hi,
my VU+ Duo don't start. Only the red light on the front ist on.
I replace the C807 but the Output via Serial is the same as before
BCM73350010
012
Shmoo Version=1.9
MEMC-00000000 RW=00000010 WW=00000049 G=00000001 R=00000008 W=00000016
MEMC-00000001 RW=0000000E WW=00000047 G=00000001 R=00000007 W=00000000 #$
3
COPY CODE
A
the "A" is the last Char. The Red Light is on the Display say nothing. The box was running a half year. No Changes where made (Software etc..) since the last Image (half year). The Image was VTI Image.
Any Ideas what i can do???
(ps. USB stick flash (different Sticks) or VU Util Flash via LAN + Serial wont work)
LAN Port 8Yellow light is on but no Link when it is connected. If i Powered on the box the cooling fan don't work.
my VU+ Duo don't start. Only the red light on the front ist on.
I replace the C807 but the Output via Serial is the same as before
BCM73350010
012
Shmoo Version=1.9
MEMC-00000000 RW=00000010 WW=00000049 G=00000001 R=00000008 W=00000016
MEMC-00000001 RW=0000000E WW=00000047 G=00000001 R=00000007 W=00000000 #$
3
COPY CODE
A
the "A" is the last Char. The Red Light is on the Display say nothing. The box was running a half year. No Changes where made (Software etc..) since the last Image (half year). The Image was VTI Image.
Any Ideas what i can do???
(ps. USB stick flash (different Sticks) or VU Util Flash via LAN + Serial wont work)
LAN Port 8Yellow light is on but no Link when it is connected. If i Powered on the box the cooling fan don't work.
ripblade
Vu+ User
Try powering the USB stick with a USB Blackhole older image (http://vuplus-community.net/board/threads/blackhole-vu-duo-1-6-5.3242/) before the bootloader was needed.
if that flashes to your box and it starts make sure that if your upgrading the image to a newer version install the bootloader which lets you flash lager images.
the bootloader can be found some were in the forums just search!
Since your box is starting ok after you replaced the cap your new problem is not to find in the powersupply I guess.
Try to reinstall and see if you get the picture back.