Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]

Announcement

Collapse
No announcement yet.

User Profile

Collapse

Profile Sidebar

Collapse
LENOVO-A880
LENOVO-A880
Not A Bad BIOS
Last Activity: 04-19-2024, 12:27 AM
Joined: 02-19-2014
Location: SELANGOR
  •  
  • Filter
  • Time
  • Show
  • Source
Clear All
new posts
  • LENOVO-A880
    replied to Need help to buy replacement for toasted diodes
    in General Electronics Technical Discussion
    Re: Need help to buy replacement for toasted diodes



    Hi Jiroy,
    Thanks a lot for your responses, the info you given here is very much useful and correct. I'll post some of the follow up repairs of the VDO odometer circuit board which i'm currently working on after i buy the replacement parts frm my local online store. Cheers!
    ...
    See more | Go to post

    Leave a comment:

  • LENOVO-A880
    started a topic Need help to buy replacement for toasted diodes
    in General Electronics Technical Discussion

    Need help to buy replacement for toasted diodes

    Hi! I hope someone can help me out cause I'm looking into replacing one of the barrier diode that is faulty on my VDO odometer circuitboard due to short circuit lately. The part has marking on its body which reads "SJ" on the upper row while "39" on the lower.

    Close-up photos included for the part and the numbers but the problem i can't find this part for sale anywhere. Oh! I don't even know if this part has any datasheet available for free online. So I wonder does anybody know any suitable replacement ot something equivalent to it?

    Thanks ahe...
    See more | Go to post
    Last edited by LENOVO-A880; 06-14-2023, 10:55 PM.
  • LENOVO-A880
    replied to Conform Coatings Application On Motherboard /Circuit board
    in Equipment Usage, Soldering, Techniques, and Reviews
    Re: Conform Coatings Application On Motherboard /Circuit board


    Will it be truly necessary to completely remove the existing coat on these memory module before even applying the new acrylic coat. What will happen if I don't remove the coatings as I don't have the necessary tools to do it?...
    See more | Go to post

    Leave a comment:

  • LENOVO-A880
    started a topic Conform Coatings Application On Motherboard /Circuit board
    in Equipment Usage, Soldering, Techniques, and Reviews

    Conform Coatings Application On Motherboard /Circuit board

    Hi Badcapers,
    Would like to ask I'm having a few boards which some are memory modules PC100/PC133, motherboard from Acer Aspire V76M desktop system, wireless card and laptop memory modules which are not working properly likely due to minor shorts causing crashes on systems. Can any light conformal coatings usage in aerosol/spray mode be used on these circuits boards as a protective layer/film to prevent from dusty environment? What kind of brands available out there will be specialised for insulating boards against chemical or corrosive attack? THANK YOU..
    See more | Go to post
  • LENOVO-A880
    started a topic Suspected DWM156 D-LINK USB Adapter Mainboard With Leaky Transistor
    in Troubleshooting & Designing Networks

    Suspected DWM156 D-LINK USB Adapter Mainboard With Leaky Transistor

    Hello Badcaps.net,

    Does anyone has any clues what the value of this SMD transistor([B]PIC01[/B]). I suspected it's a leaky transistor where the mainboard of this DWM-156 DLINK USB Adapter failed to read the SIM card whenever I tried to use it to access the internet service. BTW I have attached some of the photos of the adapter mainboard and other parts([B]PIC02,PIC03,PIC04[/B]) so if you guys have any ideas for fixing it you're always welcomed to post them here. THANKS AHEAD OF TIME..
    Hello Badcaps.net,

    Does anyone has any clues what the value of this SMD transistor([B]PIC01[/B]).    ...
    See more | Go to post
    Last edited by LENOVO-A880; 06-04-2018, 06:14 AM.
  • LENOVO-A880
    replied to Suspected leaky cap causing fast draining batt for SAMSUNG GT-I8552
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    Re: Suspected leaky cap causing fast draining batt for SAMSUNG GT-I8552

    Hi R_J Badcaps.net,

    Do you have any ideas how does the C518 ceramic capacitor of the mainboard GT-I8552 connect to the rest of the circuit for instance, THE CHARGING CIRCUIT of this phone and also if possible can you pls explain in briefly how and where it leads to. Here would like to attach the PCB diagram of SAMSUNG GT-I8552 for your reference..THANKS AGAIN HERE


    From,
    LENOVO-A880...
    See more | Go to post
    Last edited by LENOVO-A880; 05-15-2018, 02:11 AM.

    Leave a comment:

  • LENOVO-A880
    replied to Suspected leaky cap causing fast draining batt for SAMSUNG GT-I8552
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    Re: Suspected leaky cap causing fast draining batt for SAMSUNG GT-I8552



    Hi R_J Badcaps.net,

    First of all I'm saying thanks for the very useful link you have posted here for me which will definitely provide the exact value of the C158 capacitor. I'll be likely ordering it at soon as possible as well as posting some photos of the repair here in this forum later on. Another thing is on the previous post I've mistakenly spotted a wrong ceramic capacitor label, it is C518. BTW thanks a lot for looking up the precise value here for me so that I can repair it...
    See more | Go to post
    Last edited by LENOVO-A880; 05-13-2018, 09:41 AM.

    Leave a comment:

  • LENOVO-A880
    started a topic Suspected leaky cap causing fast draining batt for SAMSUNG GT-I8552
    in Troubleshooting Laptops, Tablets, and Mobile Devices

    Suspected leaky cap causing fast draining batt for SAMSUNG GT-I8552

    Hi Badcaps.net,

    Does anyone here has any idea what the value of this ceramic capacitor (C158). I do able to download the schematic for my Samsung GT-I8552. They included only the part lists but not able to provide the values for the use of anyone who attempting to fix their useless product...that's the reason I'm here to post the photo of my SAMSUNG GT-I8552 mainboard asking for just little help from you guys. Thanks in advance if any kinds of help available to fix my leaky ceramic capacitor issue on my phone!

    From,
    LENOVO-A880...
    See more | Go to post
    Last edited by LENOVO-A880; 05-08-2018, 06:47 AM.
  • LENOVO-A880
    replied to Win7 updates for upgrading to Win10
    in General Computer & Tech Discussion
    Re: Win7 updates for upgrading to Win10

    LINK: [url]https://www.lewrockwell.com/2016/08/gary-north/losing-privacy/[/url]

    In case if you don't know..Windows 10 sucks our data into its database. The Windows 10 agreement is clear:

    [B] Finally, we will access, disclose and preserve personal data, including your content (such as the content of your emails, other private communications or files in private folders), when we have a good faith belief that doing so is necessary to [/B]:

    1: comply with applicable law or respond to valid legal process,...
    See more | Go to post
    Last edited by LENOVO-A880; 12-24-2016, 11:34 AM.

    Leave a comment:

  • LENOVO-A880
    replied to Win7 updates for upgrading to Win10
    in General Computer & Tech Discussion
    Re: Win7 updates for upgrading to Win10

    [url]http://www.theverge.com/2016/1/16/10780876/microsoft-windows-support-policy-new-processors-skylake[/url]

    "You Vill Buy Windows 10!"..believe me..Re: Win7 updates for upgrading to Wi.....believe me..Re: Win7 updates for upgrading to Win10

    [url]http://www.theverge.com/2016/1/16/10780876/microsoft-windows-support-policy-new-processors-skylake[/url]
    See more | Go to post

    Leave a comment:

  • LENOVO-A880
    replied to Motherboard schematics archive?
    in Schematic Requests ONLY!
    Re: Motherboard schematics archive?

    HELLO ALL BADCAPPERS,
    Does anyone here has found a schematic for ASUS P5KPL-AM EPU Socket 775 G31 with DDR2 motherboard? I have no luck finding it from the web...
    See more | Go to post
    Last edited by LENOVO-A880; 08-24-2016, 01:42 AM.

    Leave a comment:

  • LENOVO-A880
    replied to Own Custom Build Computer With ECS Motherboard-No POST
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
    Re: Own Custom Build Computer With ECS Motherboard-No POST

    Hi [B]Agent24[/B],

    I had previously managed to desolder one of this array capacitor (flat pins) that ties to the ic ST75185CTR for pulling the logic level low as motherboard drive PS_ON# normally with this open collector driver that can pull the signal level down. However, unfortunately while trying hard to remove it from the motherboard, a few pins of the array capacitor have been destroyed by overheating them. Here, I would really like to know if you have any idea of what kind of tip should be used to rework...
    See more | Go to post
    Last edited by LENOVO-A880; 06-14-2016, 05:38 AM.

    Leave a comment:

  • LENOVO-A880
    replied to Own Custom Build Computer With ECS Motherboard-No POST
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
    Re: Own Custom Build Computer With ECS Motherboard-No POST

    ....so lately I resoldered the[B] ST75158CTR[/B], an SOP-20 ic but unfortunately I lifted 2 tiny pads on the motherboard while using my soldering iron with temperature control. The reason is that it doesn't have any auto-reset on the temperature setting and i kept increasing the temperature till it was around 400°C. This is a big mistake and I had previously messed with its' setting so the temperature is all the way out of range..(refer [B]PIC-A)

    [/B]...you can actually notice that I rewired the lifted pads...
    See more | Go to post
    Last edited by LENOVO-A880; 06-06-2016, 06:56 AM.

    Leave a comment:

  • LENOVO-A880
    replied to I need biostar G31-M7. schematic.
    in BIOS & Schematic Requests!
    Re: I need biostar G31-M7. schematic.

    Hi [B]banchi99[/B],
    I found the schematic diagram for your motherboard from here or link ([url]http://kythuatvitinh.vn/forum/mainboard-pc/th%E1%BA%A3o-lu%E1%BA%ADn-s%E1%BB%ADa-ch%E1%BB%AFa-mainboard-pc-repair-discussion/12256-c%E1%BA%A7n-xin-schematic-c%E1%BB%A7a-main-biostar-g31-m7[/url]). I uploaded the whole PDF file and post it here..not really sure if the version is the one you're looking for but I hope it will help. If you don't mind can I know the symptoms or troubles of your board..it might be interesting if there are pictures...
    See more | Go to post

    Leave a comment:

  • LENOVO-A880
    replied to Own Custom Build Computer With ECS Motherboard-No POST
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
    Re: Own Custom Build Computer With ECS Motherboard-No POST



    Hi [B]Agent24[/B],

    Do you have any idea about the correct soldering temperature for ST75185CTR or 686-4954. It should be an SOP-20 ic if not mistaken. The datasheet does not provide any reliable information on the reflow temperature for the ic. Can you please help me on this one? I'll still try to work on it this weekend...

    Thank youRe: Own Custom Build Computer With ECS Motherboard-No POST



    Hi [B]Agent24[/B],

    Do you have any idea about the    ...
    See more | Go to post
    Last edited by LENOVO-A880; 04-05-2016, 10:15 PM.

    Leave a comment:

  • LENOVO-A880
    replied to Own Custom Build Computer With ECS Motherboard-No POST
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
    Re: Own Custom Build Computer With ECS Motherboard-No POST

    Hi [B]Agent24[/B],

    It has been a while since the last post on testing the discrete signal through the capacitor EC49's positive lead. The EC49 capacitor is working perfectly but I found a badly overheated SMT package I.C. which happens to be the ST75185CT-S. From the schematic (page 25), it controls the COM port by getting a dual switching power deriving from the 5V and +12V PSU (flyback converters). It's a serial port controller, the one with label [B]U1[/B] from the picture I've attached...

    [U]Questions...
    See more | Go to post
    Last edited by LENOVO-A880; 11-26-2015, 10:44 AM.

    Leave a comment:

  • LENOVO-A880
    started a topic Need Help Understanding TRIAC In AC Circuit
    in General Electronics Technical Discussion

    Need Help Understanding TRIAC In AC Circuit

    Hello,

    This is one of the electronic course project which I'm currently doing so first I'll tell you what I think I have learned but not really helpful and then I'll ask a few questions.

    --A [B]TRIAC[/B] is an AC device when voltage is applied to the gate, it allows AC to pass through it.

    [U]Own Understanding Of How TRIAC Works In AC Voltage Circuit
    [/U][COLOR=DarkOrange][COLOR=Red]"Don't be afraid to insult me--if I have this wrong. Please just spell it out to me as I'm still learning a bit more"
    [/COLOR][/COLOR][LIST=1][*][U]Situation-A[/U]:...
    See more | Go to post
    Last edited by LENOVO-A880; 11-12-2015, 01:47 PM.
  • LENOVO-A880
    replied to Own Custom Build Computer With ECS Motherboard-No POST
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
    Re: Own Custom Build Computer With ECS Motherboard-No POST



    [U]D9431-S SHUNT REGULATOR[/U] (HA17L431ALTP)

    PIN_C (CATHODE): 2.47V

    As for the resistors ER10 and ER11, I found out that both of the resistors are having the same 2.47V which is slightly lower here whenever I measured them towards the gnd or towards the Ref pin of the D9431-S SHUNT REGULATOR. BTW, I too tried to measure up ER10 towards the other end which also happened to be [B]VREF1_05V[/B] output and both of the ER10 and ER11 showed 1.067V. Here it's slightly the same voltage that...
    See more | Go to post
    Last edited by LENOVO-A880; 06-30-2015, 10:51 AM.

    Leave a comment:

  • LENOVO-A880
    replied to Own Custom Build Computer With ECS Motherboard-No POST
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
    Re: Own Custom Build Computer With ECS Motherboard-No POST



    [U]DAC-AS358 SOIC-8[/U] (Pg.11 schematic)

    PIN_03 (inverting input): 2.25V
    PIN_02 (non-inverting) : 1.06V

    ......as U4A is part of the digital-analog converter, thus the ref signal 1_05V is pegged as HIGH by the +12V rail of the PSU. If the ref signal is available the 1_8VSTR will be present too and this voltage can be obtained frm the Q21's transistor Drain pin.

    [U]FET-APM2055N[/U] (Pg.11 schematic)

    Q21's drain pin (output) : 2.94V
    Q21's source...
    See more | Go to post
    Last edited by LENOVO-A880; 06-22-2015, 09:11 AM.

    Leave a comment:

  • LENOVO-A880
    replied to Own Custom Build Computer With ECS Motherboard-No POST
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
    Re: Own Custom Build Computer With ECS Motherboard-No POST



    ...wow do you mean that I'm getting into all this suspected TCC sensor broken will likely be wrong...? Do you have any ideas to actually locate the right Southbridge_VCC or other voltages on the motherboard? For the voltage of the Southbridge_VCC, I abruptly measure the positive legs of all those 3 Nichicon capacitor located between the Southbridge and the ram slots, then I just get one of the capacitors reading which is [B]EC49[/B], so am I measuring the correct [B] VCC voltage[/B] here?Re: Own Custom...
    See more | Go to post
    Last edited by LENOVO-A880; 06-11-2015, 02:30 AM.

    Leave a comment:

No activity results to display
Show More
Working...
X