Re: Lenovo V310-15IKB please bios
Thank you for this build.
I used this on Lenovo V310-15IKB 80T3
S/N:LRLR09BPZ6
Mfg Date:17/06/21
DA0LV6MB6F0 REV:F
CPU: i7-7500U
BIOS: MX25L12805
After burning this dump, after a few slow reboots, there were problems when entering Bios Setup which were fixed by writing the official ME from Lenovo 2wme06ww.exe. Also, after enabling Bios downgrading in Setup, I was able also to write the bios.cap from 2wcn46ww.exe (only a very small portion of it was written since it matches...
badrianiulian
Member
Last Activity: 10-02-2022, 02:10 PM
Joined: 04-27-2012
Location: Neamt
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Dell 1800FP Power Supply Question
Hello
I don't know where to find this answer
I found a working Dell 1800FP Power Supply ( 6870t445d10 ) and I was wondering if anyone knows it's specifications ? I mostly would like to know how many amps do the 5V and 12V provide?
Thank you -
Need help finding flash rom for Fujitsu SOUNDSYSTEM DS P2100 Tube
Hy
I got a friend that has a "Fujitsu SOUNDSYSTEM DS P2100 Tube"
The main IC that controlls just about everithing is dead. It is a AT89C2051-24SU.
I removed it from the circuit, added a couple of 0 value resistors on the volume IC (that was controlled through I2C protocol by the main IC) and now the hole system sounds like crap ... just a regular high pass in the two small speakers and a low pass in the subwoofer ... no surround
So I was hoping that someone had a firmware for the thing so I can program another AT89C2051-24SU
Thanks -
Re: Help finding schematic for ITE UP30432
Yes I can confirm that connecting a lab supply is safe... I used a DIY power supply I build a while ago [URL="https://www.facebook.com/media/set/?set=a.487168201448114.1073741829.486189244879343&type=1&l=8c07373402"]https://www.facebook.com/media/set/?set=a.487168201448114.1073741829.486189244879343&type=1&l=8c07373402[/URL]Re: Help finding schematic for ITE UP30432
Yes I can confirm that connecting a lab supply is safe... I used a DIY power supply I build a while...Leave a comment:
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Re: Help finding schematic for ITE UP30432
The voltage variation at pin 7 was done by me manually from the lab power supply and well, the schematic in fig 35 isn't the same as this power source... I'll try to build one and post it... I still was hoping someone had itLeave a comment:
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Re: Help finding schematic for ITE UP30432
By now I've triple checked all the resistors, the active components and the capacitors are measured to their markings. I once had a case where some electrolytics leaked on the board and the smps went haywire with a variable output... After cleaning all was good. Could this be a cause?
I ask this becouse I don't have a history of this power source and to remove all components to clean the board will take foreverLeave a comment:
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Re: Help finding schematic for ITE UP30432
It seems I misjudged the transistor on the heatsink... It is actually a NPN Transistor: TIPL760A
Measurement one:
pin 1:5,92v pin 2:2,49V
pin8: 5V [COLOR="Red"]pin7: 10,33V pin6:8,93V[/COLOR]
BUZ71A Gate pin 7,57V
Measurement two:
pin 1:5,92v pin 2:2,49V
pin8: 5V [COLOR="Red"]pin7: 13,13V pin6:11,77V[/COLOR]
BUZ71A Gate pin 9,98V
Measurement three:
pin 1:5,92v pin 2:2,49V
pin8: 5V [COLOR="Red"]pin7:...Leave a comment:
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Re: Help finding schematic for ITE UP30432
I've been poking, replacing, measuring all components (including capcacitors with a 20000mF max capacimeter) and I'm begining to think my transformer may be bad.
I've compared some windings on at least four transformers from some dvd players smps I have laying arround for parts and I think that my primary may be the cause... maybe a short?
I've measured the AUX winding from all transformers and it's about 0,4 ohms to 0,8 ohms... The primary varies from 1 ohm (big transformer) to 2,2 ohms (smaller transformer)... As for my readings...Leave a comment:
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Re: Help finding schematic for ITE UP30432
So, a recap for IC measurements, since I missed some answers:
Voltage Feedback (2) = 0v to 0,8V variable
Vcc (7) = 11,7 to 14V variable
Vref (8) = 0,3V to 1,4VLeave a comment:
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Re: Help finding schematic for ITE UP30432
The one without a heatsink is a BUZ71A 13A/ 50V/ N-Channel Power MOSFET ... it is fed by the AUX winding
Vrev is variable from 0,3V to 1,4VLeave a comment:
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Re: Help finding schematic for ITE UP30432
Here are more pictures:
[ATTACH]122997[/ATTACH]
[ATTACH]122998[/ATTACH]
[ATTACH]122999[/ATTACH]Re: Help finding schematic for ITE UP30432
Here are more pictures:
[ATTACH]122997[/ATTACH]
[ATTACH]122998[/ATTACH]
[ATTACH]122999[/ATTACH]Re: Help finding schematic for ITE UP30432
Here are more pictures:
[ATTACH]122997[/ATTACH]
[ATTACH]122998[/ATTACH]
[ATTACH]122999[/ATTACH]...Leave a comment:
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Re: Help finding schematic for ITE UP30432
No... when I connect a fan on 12V it does not run at full speed since there are voltage the drops... ticking still there
When I checked on pin 7 of ic (VCC), the voltage varies from 11,7v to 14v... very weird...Leave a comment:
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Re: Help finding schematic for ITE UP30432
It may appear that way but all the output caps are not bloated ... they look normalLeave a comment:
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Re: Help finding schematic for ITE UP30432
The 8-pin DIP IC is UC3842B
No other electrolytic caps are in the primary side
The resistance varies between GND and +5V and +12V... between the GND and -5V is about 8k.
Diode mode:
+ to GND - to 5V = 155, - to GND + to 5V = 833 going up slowly
+ to GND - to 12V =138, - to GND + to 12V = beyond 1999
+ to -5V + to GND = 715, - to -5V + to GND = 1947 going up slowly...Leave a comment:
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Re: Help finding schematic for ITE UP30432
What do you mean... there is the first heatsink that has the mos-fet
There is another TO220 transistor witch did not have a heatsink in the first place in the hight voltage area.
On the second heatsink there are the shotky rectifier diodes.. two for 5V and two for 12V... the -5V has only one small diode on the board and a 7905 regulator...Leave a comment:
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Re: Help finding schematic for ITE UP30432
Those were the ones I replacedLeave a comment:
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Re: Help finding schematic for ITE UP30432
Here are the pictures... these are the best I can do
[ATTACH]122962[/ATTACH]
[ATTACH]122963[/ATTACH]
[ATTACH]122964[/ATTACH]
[ATTACH]122965[/ATTACH]
[ATTACH]122966[/ATTACH]
[ATTACH]122967[/ATTACH]Re: Help finding schematic for ITE UP30432
Here are the pictures... these are the best I can do
[ATTACH]122962[/ATTACH]
[ATTACH]122963[/ATTACH]
[ATTACH]122964[/ATTACH]
[ATTACH]122965[/ATTACH]...Leave a comment:
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Help finding schematic for ITE UP30432
Hello
Some time ago I bought a power supply model ITE UP30432 +5V/-5V/+12V 3A/0.3A/2A Power Supply 5 Pin just like the one in this link: [URL="http://www.ebay.co.uk/itm/ITE-UP30432-5V-5V-12V-3A-0-3A-2A-Power-Supply-5-Pin-/311474055288?hash=item48854ce878:g:ts8AAOSw-7RVELkT"]http://www.ebay.co.uk/itm/ITE-UP30432-5V-5V-12V-3A-0-3A-2A-Power-Supply-5-Pin-/311474055288?hash=item48854ce878:g:ts8AAOSw-7RVELkT[/URL]
Since I bought it, there was a problem with it... it did not power up
The previous owner replaced the 12v shotky diodes with two regular rectifier diodes and... -
Re: Proview 700P RPC-787KC/October 2006
Even though the caps on the power board looked OK I replaced them. There were 2 caps of 680uF/25V on one voltage side and another 2 of 680uF/25V on the other and I replaced them with caps of 1000uF/25V + 470uF/25V on each side. Also there were another 2 caps of 470uF/25 witch I also replaced.
So far it's looking fine and no flickering has appeared in the last 12 hours (while it was working)Leave a comment:
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Re: Proview 700P RPC-787KC/October 2006
Hello again
So the flickerin' is back and I took a picture of the main board
There is no 1.8v regulator though, only a 3.3v
[ATTACH]71325[/ATTACH]...Leave a comment:
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