Hello,
im actually trying to save a d1500 delay from yamaha. I found the service manual but schematic is missing and BOM list is a bit unclear as components listed have no reference linked to the pcbs... In my case, one zener diode was broken (114 code on the pcb in attached file) and couldn't be repaired : it was a zener type package. In the BOM list i found 3 reference on this board : 1S555 (can be replaced by 1N4148), RD4.7EB2 (approx 5v rectifier), RD7.5EB3 (approx 7v rectifier)...
Actually the cathode goes to VCC of sram M5M5118P, without this diode missing, i have...
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by MDSIHello.
I have an Asus X705UV which no longer starts since the last Windows update. I suspect Windows Update of having tried to update the bios and having corrupted it, because currently, I have the charging indicator when I plug in the charger and I have the power indicator when I press the on/off button but nothing more, not even a fan running.
Could someone check this bios and if it is broken, repair it?
Sorry in advance, google translate is useful but not perfect. 😂
Thank you in advance ! 🙏...-
Channel: BIOS Requests ONLY!
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by nickstyleHi, i have this laptop and in device manager the RTX 3050TI has an exclamation mark
Tried windows 11 and 10 and same thing
Any ideea what is the problem?Today, 08:51 AM -
by fedeRaiderHello everyone
My TV no longer shows signs of life, but if I unplug the motherboard, the backlight works.
I bought a CH341A USB Programmer, and this is my dump (BN41-02568B):
Could someone help me fix it?...Today, 06:05 AM -
by orgamishoHello!
I am still learning on laptop repairs and I am currently working on the above mentioned device.
Currently the laptop is dead (no power on). The device takes 2-3 mA when 20v are injected onto the charging plug.
Main power rail is present (20v), but no other power rail is present, including the 3v and 5v. I noticed that when no power is connected the 3v and 5v coils have large (normal) resistence to ground, but when I plug the power, both are being shorted to ground.
I wonder is that an expected behavior or there is an outer protection activated.
...Today, 08:22 AM -
by KartowlHi, my TV image started showing those lines and the image faded away, but sound is still coming from it, what could be the cause and is it fixable? I thought it could be the tcon board but I red on the internet that it could be a failing panel
[ATTACH=JSON]{"data-align":"left","data-size":"custom","height":"375","title":"WhatsApp Bild 2024-04-22 um 21.04.21_00336065.jpg","width":"500","data-attachmentid":3258095}[/ATTACH]...Yesterday, 12:57 AM -
by petehall347have been looking at earth leakage clamp meters and its like a minefield out there . i wondered if anyone here had bought one that actually works properly ?...04-17-2024, 01:31 PM
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by abajorI've gotten into the habit of Looking at peoples Mechanical Hard drives with a Ubuntu thumb drive to boot their system.
I understand the raw values are not really uniform between manufacturers, but I have noticed that high seek and read error raw values at the very least correlate to a drive that is going to have sub par access time, and extremely slow OS booting.
The odd thing is I've often seen very high seek and read error rates on drives with fairly low on time.
Does anybody have any other takes on evaluating smart data? I've used Crystal Disk Info, It seems to present...-
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Yesterday, 11:43 PM -
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by frankusbThe receiver is going into protect mode when switching inputs or enabling/disabling A or B speakers on the front panel. I removed the protect signal from the main microprocessor and the system played normally on FR and FL speakers from an analog input. I measured the protect signal and it's attached.
[ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3242189}[/ATTACH]
I checked the idle current adjustment on each of the 5 channels and adjusted them slightly (less than 2mV). I checked the DC offset...-
Channel: Troubleshooting Audio Equipment
03-25-2024, 02:11 PM -
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by RofixHi everyone, I wanted to kindly ask you for help, I have a problem with my Dell vegas/turis mlk kbl-r 17841-1 wx2rr PC, it turned off and I was no longer able to turn it back on, I'm checking the various voltages, unfortunately I found the 19 v up to the input components PU4411, PQ4401, thank you all for any advice
[ATTACH=JSON]{"alt":"Click image for larger version Name:\tIMG_20240424_111713072.jpg Views:\t0 Size:\t855.7 KB ID:\t3258866","data-align":"none","data-attachmentid":"3258866","data-size":"custom","height":"843","title":"IMG_20240424_111713072.jpg","width":"1124"}[/ATTACH]...Today, 03:48 AM
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by fedeRaiderHello everyone
My TV no longer shows signs of life, but if I unplug the motherboard, the backlight works.
I bought a CH341A USB Programmer, and this is my dump (BN41-02568B):
Could someone help me fix it?...Today, 06:05 AM -
by MDSIHello.
I have an Asus X705UV which no longer starts since the last Windows update. I suspect Windows Update of having tried to update the bios and having corrupted it, because currently, I have the charging indicator when I plug in the charger and I have the power indicator when I press the on/off button but nothing more, not even a fan running.
Could someone check this bios and if it is broken, repair it?
Sorry in advance, google translate is useful but not perfect. 😂
Thank you in advance ! 🙏...-
Channel: BIOS Requests ONLY!
Today, 06:38 AM -
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by alford111Hi. Can any one help me with a schematic for Predator Helios 300 G3-571-77QK. Many thanks in advance.
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Today, 02:35 AM -
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by Zhab27Всім доброго дня!
Режиму очікування немає.
Перепаяв SPI 25Q40 і прочитав прошивку. У дампі перші байти не стираються. Записав дамп донора BN94-12399N, режим очікування з'явився з , але телевізор все одно не виходить в робочий режим. Будь ласка, допоможіть відновити рідний дамп!Today, 05:55 AM -
by timonix20hello everyone I am looking for a solution for my tv, I think corruption of the eemc,
the TV starts, LG logo, then nothing (rear backlight)
no reaction to rear command or infrared
the usb procedure that I tried on the LG site is a procedure with the screen and the remote control so I can't.
I have a chance with a usb procedure or other if you have .bin
if any people have this main board
Sony LG 60la620s EAX64797004 (1.1)
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"1713895782944.jpg","data-attachmentid":3258485}[/ATTACH]...Yesterday, 01:52 PM -
by debidoobsHello,
im actually trying to save a d1500 delay from yamaha. I found the service manual but schematic is missing and BOM list is a bit unclear as components listed have no reference linked to the pcbs... In my case, one zener diode was broken (114 code on the pcb in attached file) and couldn't be repaired : it was a zener type package. In the BOM list i found 3 reference on this board : 1S555 (can be replaced by 1N4148), RD4.7EB2 (approx 5v rectifier), RD7.5EB3 (approx 7v rectifier)...
Actually the cathode goes to VCC of sram M5M5118P, without this diode missing, i have...-
Channel: Troubleshooting Audio Equipment
Today, 09:01 AM -
-
by nickstyleHi, i have this laptop and in device manager the RTX 3050TI has an exclamation mark
Tried windows 11 and 10 and same thing
Any ideea what is the problem?Today, 08:51 AM -
by orgamishoHello!
I am still learning on laptop repairs and I am currently working on the above mentioned device.
Currently the laptop is dead (no power on). The device takes 2-3 mA when 20v are injected onto the charging plug.
Main power rail is present (20v), but no other power rail is present, including the 3v and 5v. I noticed that when no power is connected the 3v and 5v coils have large (normal) resistence to ground, but when I plug the power, both are being shorted to ground.
I wonder is that an expected behavior or there is an outer protection activated.
...Today, 08:22 AM -
by abajorI have the above mentioned MBP, quick scan with thermal camera revealed that only U3200 was heating up. I found that C3208, C3219 and C3205 were all reading ~6.8ohms to ground.
so I swapped U3200.
I connected the PSU again for a quick check on thermal it's drawing about the same amount of current but now I'm seeing only heat radiating from U7800 and the T2 chip from under the black shielding fabric, and the bottom of the board.
It's hard to judge the actual temperature without removing the shielding.
Does anybody have any insights?
PPBUS_G3H is...Yesterday, 06:07 PM -
by RofixHi everyone, I wanted to kindly ask you for help, I have a problem with my Dell vegas/turis mlk kbl-r 17841-1 wx2rr PC, it turned off and I was no longer able to turn it back on, I'm checking the various voltages, unfortunately I found the 19 v up to the input components PU4411, PQ4401, thank you all for any advice
[ATTACH=JSON]{"alt":"Click image for larger version Name:\tIMG_20240424_111713072.jpg Views:\t0 Size:\t855.7 KB ID:\t3258866","data-align":"none","data-attachmentid":"3258866","data-size":"custom","height":"843","title":"IMG_20240424_111713072.jpg","width":"1124"}[/ATTACH]...Today, 03:48 AM