Hi,
I'm troubleshooting a power supply board and one opto coupler seems shorted. It's a through-hole, marked with 3 lines:
1223
816A4
W
I'm not sure what replacement to buy for it. It resembles LTV-816 ([url]https://www.tme.eu/sk/en/details/ltv-816/optocouplers-analog-output/liteon/[/url]), but I'm not sure it's 100% that. The data sheet shows multiple sub-types like 816M, 816S, but 816A is not there.
I do have other functional pieces on the same board, so I could do some measurements on those, but I'm not sure what to check.
Any idea appreciated.Hi,...
Announcement
Collapse
No announcement yet.
Badcaps Electronics Repair Forum & Schematic Search
Collapse
Collapse
Please log in to your account to view your subscribed posts.
Directory | Topics | Posts | Last Post | |||
---|---|---|---|---|---|---|
Badcaps Capacitor & Electronics Repair Forum | ||||||
Frequently Asked Questions (No Posting)
All new members, PLEASE READ HERE FIRST! Posting only allowed by established members.
Topics: 45
Posts: 733
|
45 | 733 | ||||
Announcements & Related News
Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!
Topics: 236
Posts: 42,232
|
236 | 42,232 | ||||
Document & Software Archive | ||||||
Common Parts Library - Datasheets
Share or download datasheets or application notes for electronic components and other parts. Contribute your knowledge or ask questions. Before using please read our Terms of Service.
Topics: 1
Posts: 4
Last Post:
ncp81208 datasheet
|
1 | 4 | ||||
General Topics | ||||||
General Capacitor Questions & Issues
Questions and answers for identifying whether your device has bad capacitors. Also post general capacitor-related questions and issues here.
Topics: 3,190
Posts: 32,711
|
3,190 | 32,711 | ||||
General Computer & Tech Discussion
Have just a general computer question, post it here. This can be anything from an OS issue, hardware issue not related to capacitors, upgrade question, or whatever basic tech-related issue is on your mind.... This is also a good place to share your tech projects!
Topics: 4,503
Posts: 74,874
Last Post:
Need help DDR5 SPD got corrupted
|
4,503 | 74,874 | ||||
Troubleshooting Hardware & Devices and Electronics Theory | ||||||
General Electronics Technical Discussion
If you have a general question concerning basic electronics theory or component function & usage, here's where it goes.
Topics: 3,984
Posts: 44,455
Last Post:
opto something Liteon 816A4
|
3,984 | 44,455 | ||||
Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Technical discussions covering any type of desktop motherboard, video/graphics card, controller card, or whatever other desktop peripheral you need help with. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 6,855
Posts: 37,513
Last Post:
Need dell optiplex 5060 bios bin clean
|
6,855 | 37,513 | ||||
Sub-Forums:
| ||||||
Troubleshooting & Designing Networks
Post your computer network questions, ideas, gripes, and so on in here. This can be any type of network, whether its cabled, wireless, or whatever. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 501
Posts: 5,455
|
501 | 5,455 | ||||
Troubleshooting Laptops, Tablets, and Mobile Devices
Technical discussions covering any type of laptop, notebook, netbook, tablet, or smartphone. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 32,096
Posts: 306,680
Last Post:
Dell Latitude 7400 Bios Password
|
32,096 | 306,680 | ||||
Sub-Forums:
| ||||||
Troubleshooting Computer Displays
Technical discussions covering any type of PC/computer display, whether it be CRT, LCD, or anything else. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 5,328
Posts: 75,729
|
5,328 | 75,729 | ||||
Troubleshooting TVs and Video Sources
Technical questions about your defective television, projection screen, LCD/plasma, or any other type of video device. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 27,480
Posts: 375,105
Last Post:
Samsung Monitor Ls22A300B Rom
|
27,480 | 375,105 | ||||
Troubleshooting Power Supplies and Power Supply Design
Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 4,190
Posts: 65,286
Last Post:
Dell optiplex PSU problem
|
4,190 | 65,286 | ||||
Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices
Technical questions about your defective laser or ink printer, plotter, copier, scanner, and other imaging & printing devices. This section also includes digital cameras. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 304
Posts: 1,675
|
304 | 1,675 | ||||
Troubleshooting Audio Equipment
Technical discussion on audio equipment troubleshooting and installation. This can be anything from a home/car stereo, guitar amp, and so on. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 2,336
Posts: 27,569
Last Post:
Denon UCD77 schematic
|
2,336 | 27,569 | ||||
Troubleshooting Appliances and other Household Electronic Stuff
Technical discussion on household appliances & other household electrics & electronics; including troubleshooting and installation. This can be anything from a washer/dryer, dishwasher, microwave oven, other sordid kitchen electrics and so on. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 227
Posts: 3,952
Last Post:
BOSCH Microwave CFA634 error E1006
|
227 | 3,952 | ||||
Troubleshooting Game Consoles & Other Weird Devices
This can be anything from game consoles to arcade games to anything else that doesn't really fit into any of the above categories. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 1,008
Posts: 10,913
Last Post:
GPS Navigon A12XL not charging.
|
1,008 | 10,913 | ||||
Equipment Usage, Soldering, Techniques, and Reviews
Technical discussions concerning soldering techniques, usage of test equipment, how it works, what's best, and some pointers in using it all.
Topics: 1,381
Posts: 19,454
|
1,381 | 19,454 |
What's Going On?
Collapse
There are currently 399030 users online. 3984 members and 395046 guests.
Most users ever online was 1,342,976 at 10:51 PM on 04-26-2024.
- alfredosn ,
- flip_online ,
- karemkf ,
- tomsu666 ,
- munir100 ,
- JAFATAGNA ,
- HAFIZUR411983 ,
- original ,
- Dolapo1608 ,
- mrkmpn ,
- ciberkike kike ,
- Serhii Isakov ,
- slurpie ,
- Abi Abi ,
- AnnonDog ,
- leva2407 ,
- Luís Amaral ,
- xd2010 ,
- Blaze Tech ,
- diego2019 ,
- OneITGuy100 ,
- Rustam14 ,
- danish03334884781 ,
- Igor_IP ,
- saadna ,
- troudi ,
- dfragx ,
- maverikdj ,
- Mr.dialogue ,
- foudil ,
- ahmedmeer ,
- proteknik ,
- Crazystorm ,
- shlomim412 ,
- testinglaptops ,
- GamerLufy ,
- MICHAEL dsouza ,
- dylen ,
- osymatech ,
- jgabriel ,
- arora12 ,
- SebastianGil ,
- silver60618 ,
- freakorio ,
- Steven Pieter ,
- manga.daku191 ,
- arrozpegao ,
- tajnok ,
- suranga.sanjeewa ,
- mon2 ,
- qayyum786 ,
- Celular Madero ,
- Raka03 ,
- Blackam8899 ,
- kimiki ,
- Cornito ,
- MauroRendon ,
- Ukdigger ,
- Daniel Ley ,
- Rinxx ,
- hopkok ,
- winbond ,
- ahasuyana ,
- YOUNES MIH ,
- Oliver Kocsis ,
- Ariel Ruiz ,
- eDonkey ,
- mard312 ,
- huntom ,
- Edgars UK ,
- mouzied ,
- woji ,
- cheeky2 ,
- Jefftoro ,
- CpJohn ,
- hayrieker ,
- smart008 ,
- Evgeny Kuzmin ,
- yop_FR ,
- borzik ,
- RSKostya ,
- fernandonext ,
- anil2014 ,
- thesame ,
- yokrysty ,
- LunarEklipze ,
- vexarvf1s ,
- darckreign1984 ,
- skinner ,
- dacyr ,
- Hkekkonen ,
- vijayppatel017 ,
- cau12bebimu198 ,
- corneliusss ,
- Dereksk8 ,
- clearchris ,
- monkeynuts ,
- asker0485 ,
- lety ,
- DeniS182 ,
- darpor ,
- lemmer ,
- syedlaiq ,
- payam ,
- Arenz ,
- kcarval ,
- bari ,
- jikonik ,
- Oth Ar ,
- rafsad ck ,
- victor-r ,
- rfxcasey ,
- yassin1913 ,
- maloy2k4 ,
- vasyapuprin
Badcaps Statistics
Collapse
Topics: 102,627
Posts: 1,273,573
Members: 495,468
Active Members: 16,651
Welcome to our newest member, ciberkike kike.
Latest Topics
Collapse
-
by jm1234Today, 03:30 AM
-
by skinnerLooking for some help with a bios password. Any help would be appreciated.
Dell Latitude 9410
Service Tag - H803043
Board - LA-J541P REV 1.0...-
Channel: BIOS Requests ONLY!
05-17-2024, 04:02 PM -
-
by victor-rSamsung Monitor Ls22A300B , Please, I need the Bios file that works for this monitor.
thanksYesterday, 10:49 AM -
by matheus30When I took it out it broke, and I want to get the same one or one of good quality.
Where can I buy it? On AliExpress they do not indicate the maximum amperages, and on Mouser or TME.EU it is impossible to search without having the exact reference.
Inductor needed:
It is the PP5V_G3S Coil of an A2159, 820-01598 (L7670)
On the front it says: 1R5
and in the schematic:
1.5UH - 20% - 12.5A - 0.017Ohm
PIMB062D-SM
152S00268
Can someone tell me where to buy it?
Thank you so much.Today, 11:44 AM -
by luckydipWorking on this macbook, showing 5v 0A from charger - dead. Board is clean - no liquid, owner said he left it charging and died. Some voltages:
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3274001}[/ATTACH]
After looking at board closely found L8430 damaged/blown open circuit so replaced it. No change, still 5v 0A - I'm thinking over current on L8430 (PP3V8_AON_MPMU_ISNS_VIN) killed U8100?
Tried connecting to another macbook but not in...Yesterday, 01:39 PM -
by kingblade20Hi All,
Does anyone have schematic diagram for ASUS M3401QA please? I'm in a process of debugging my own laptop which does not show any display. Thank you so much!
Cheers!-
Channel: Schematic Requests ONLY!
Today, 11:33 AM -
-
by kingblade20Hi,
My M3401QA does not power on properly: no display (all black) and with white LED charging port blinking slowly (once every ~3 seconds).
Checked several points across the board and supplies are up and running but I need to double check when I get schematic.
Result is still the same even with DC jack inserted and battery connector removed.
Tried flashing the latest BIOS as of this date to no avail which I suspect has something to do with DMI but tools could not run properly on my machine and couldn't find manual copy of DMI through hex editor and not sure...-
Channel: BIOS Requests ONLY!
Today, 11:28 AM -
-
by mustangankcasper f650 f15kr_dsc rev 2.0
bios file not working;...-
Channel: BIOS Requests ONLY!
Today, 04:13 AM -
-
by JeroentjeHi
I try to repair a asus Asus X571GT (DA0XKTMB8C0) no power no lights.
I saw a burned (small hole in it) chip (JW10F) proberly a TPS22976DPUR, I removed it, now with power connected the laptop turns on and direct off again, power led and fn will light up.
I found on a donor lenovo board a G2898KD1U (wa9y), looks the same ..
Result is still the same, turns on and direct off again, first attempt is with backlight on all other direct attempts are only the power and fn led.
Could it be the chip is to diffrent to make the laptop work again ?
...04-28-2024, 10:59 AM -
by fredyjbiPlease help sir, this board does not turn on because VSYS_OUT is 9.2v, I compared it with a normal board VSYS_OUT is 10.2v, I have replaced the PQ101 and PQ102 mosfet and BQ 25700 which is known to be good, but the results are still the same, thank you
VSYS_OUT 9.2v
Meter in resistance mode auto range 6M ohm ok
NORMAL BOARD VSYS_OUT 10.2V
[COLOR=#8e44ad][B]LINK to schematic[/B][/COLOR] -> [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/77167-required-t480-nm-b501-schematic[/url]...05-06-2024, 10:48 AM
Tag Cloud
Collapse
Trending
Collapse
-
by ianbakHi,
I have an HP 255 G8 that runs for as long as its battery holds charge but won't accept AC power.
I have partially diagnosed the problem and the issue seems to be that there is no ACDRV output from the BQ24735 to turn on the two input MOSFETs. The 24735 has a VCC of 19.57 V, the ACDET input is at 2.93 V and the REGN 6V LDO is outputting 5.98 V, so everything looks good - but ACDRV is stuck at 28 mV.
I've already replaced the 24735 and both input MOSFETs and nothing has changed.
I'd appreciate some suiggestions as to what to try next.Today, 08:45 AM -
by danitoDell Latitude 5590 ST FH1MNQ2
DDM80 LA-F411P REV 1
pwb mp3pg rev A00
Can you help me?
Thx...-
Channel: BIOS Requests ONLY!
Today, 04:37 AM -
-
by vincelxHi,
This board has slight water damages. No fan spin.
When I power on, I got:
PM_SLP_S4_L
PM_SLP_S5_L
PM_SLP_S3_L
ALL_SYS_PWRGD
all go to 3.3V, then back to 0V after 1s
PP5V_S5=5V
PP3V3_S5=3.3V
SMC_S4_WAKESRC_EN remains at 0V.
With SMC bypass, fan spins full speed.
Can you help on troubleshooting SMC_S4_WAKESRC_EN missing?...Today, 09:37 AM -
by thesameThe unit had a battery replacement , it used to work with a 2200 mah battery that i have found swollen, i have replaced it with a 1500 mah battery( i couldn't find one available at 2200mAh), tested working, after 2 months of beeing used in the car always plugged to the charger the owner sayed that it's not charging, the battery had 3.3 v instead of 3.7 , i have installed a new battery of 1500mAh, the unit powers on , shows 1% battery and it only draws current when the display is on and only shows the charging icon when i first plug the cable in then it stops after 10 or 20 seconds,and if i turn...Today, 06:18 AM
-
by alex26I have a problem with an HP laptop model 250 G5, mainboard LA-C701P. The integrated PU2 is ok, being replaced, but the problem is with the 3.3v LDO voltage, the 5.5V LDO being ok. On pin 15, instead of 3.3V, I have 3.16V and a consumption of 150m, the integrated only supports 100mA, it gets very hot. I injected 3.3V on pin 15 and the consumption remained at 150 mA and there is nothing hot under the thermal chamber. I disconnected the resistance towards pin 125 from the integrated UK1 and the consumption dropped to 0, and I assumed that the consumption is from the integrated. I replaced it with...Today, 08:55 AM
-
by DeniS182Hi all,
I have here gaming laptop asus ROG with motherboard problem. Only orange LED is on, battery charging. 3.3V is on power button and on bios chip. 5V also present. All resistances on coils looks fine instead of GPU coils, only 0.5-0.6Ohms to ground. I don't know if gpu is dead. Can samoone help me to diagnose this problem? Thanks.
Have someone schematic/boardview for this board?
GX701GX REV. 1.6
[URL=filedata/fetch?id=3274440&d=1716210813][ATTACH=JSON]{"alt":"Click image for larger version Name:\tIMG_3026.jpg Views:\t0 Size:\t2.99...-
Channel: Schematic Requests ONLY!
Today, 07:15 AM -
-
by mustangankcasper f650 f15kr_dsc rev 2.0
bios file not working;...-
Channel: BIOS Requests ONLY!
Today, 04:13 AM -
-
by kingblade20Hi All,
Does anyone have schematic diagram for ASUS M3401QA please? I'm in a process of debugging my own laptop which does not show any display. Thank you so much!
Cheers!-
Channel: Schematic Requests ONLY!
Today, 11:33 AM -
-
by kingblade20Hi,
My M3401QA does not power on properly: no display (all black) and with white LED charging port blinking slowly (once every ~3 seconds).
Checked several points across the board and supplies are up and running but I need to double check when I get schematic.
Result is still the same even with DC jack inserted and battery connector removed.
Tried flashing the latest BIOS as of this date to no avail which I suspect has something to do with DMI but tools could not run properly on my machine and couldn't find manual copy of DMI through hex editor and not sure...-
Channel: BIOS Requests ONLY!
Today, 11:28 AM -
-
by EvetsHi,
I've been searching for a schematic for a Denon UCD77 without any luck, can anyone help?
Thank you-
Channel: Troubleshooting Audio Equipment
Today, 10:25 AM -