hybridfree/eevblog-posts huggingface dataset:
Sony 21" Trinitron Monitor Fault [CPD-E530] - Page 1
Forum section: electronics / repair

author: steve30
author_rank: Frequent Contributor
timestamp: March 24, 2023, 08:04:53 am
content: I was just wondering if anyone could assist me with this 21" monitor.When I turn it on, the power light flashes orange. The service manual says this is indicative of a B+ issue.A few years ago I replaced a capacitor on the regulator circuit that powers the heater. That seems OK now. A while back it started having a lot of flickering in the picture. Its difficult to describe but it "looked" like there might be a bad connection in the video signal somewhere. Then it eventually just conked out completely with the flashing orange power light, and I haven't bothered looking at it again till now.I don't use this monitor much, but its a good quality monitor so I'd like to get it going again. Does anyone have any ideas? The problem is that its quite difficult to test any voltages when the monitor is turned on as it is very difficult to access the boards when everything is plugged in.I made a teardown video in case it is of any interest to anyone:Any suggestions are welcome.Thankssteve30.

author: inse
author_rank: Super Contributor
timestamp: March 24, 2023, 10:35:18 am
content: Just some general tips:Probably the horizontal transistor has died shorting the B+ voltage rail.The flickering indicates that there has been an issue with broken solder joints at the flyback transformer or the transistor.Also check for cracked capacitors in that area.The most unpleasant fault would be a broken flyback transformer that had been arcing inside.

author: shakalnokturn
author_rank: Super Contributor
timestamp: March 24, 2023, 12:32:58 pm
content: To add to inse's advice if it is a shorted horizontal output or flyback transistor it is important to understand why it failed. The cause can be broken solders, defective flyback transformer, bad B+ supply or poor base drive.It is worth checking the decoupling and series electrolytics in the base drive(s).

author: inse
author_rank: Super Contributor
timestamp: March 26, 2023, 08:29:19 pm
content: Nothing to be heard or seen anymore?

author: shakalnokturn
author_rank: Super Contributor
timestamp: March 26, 2023, 11:36:51 pm
content: It seems to happen to a lot of topics in the repair section

author: steve30
author_rank: Frequent Contributor
timestamp: April 01, 2023, 05:25:26 am
content: Thanks for the suggestions. I'll try and have another look at it when I get chance.I must admit the solder joints do all look OK but my eyes may well be deceiving me. I have in the past had a CRT monitor with a flyback transformer which had shorted. Fortunately I was able to get a schematic of the transformer so I was able to test it, but I was also able to purchase a replacement (albeit a non-OEM part, and it wasn't cheap).
Sony 50" TV KDL-50W800B LED TV Faulty - Page 1
Forum section: electronics / repair

author: WaynesWorld
author_rank: Contributor
timestamp: October 19, 2021, 11:25:33 am
content: Hi. I inherited one of these in a non-working order.The unit powered on. Backlight on, but no picture or sound.After a bit of reading on here and the internet in general, and some YT vids, I came to the conclusion it must be the T-con board. I think I even did some voltage tests to confirm this. Unfortunately, I didn't take note of the power LED diagnostics.I order an exact replacement from AE for about $11. Ordered a second from a different seller for about the same.The first one arrived and I just installed it. Initially it blinked the red LED 5 times. I reseated the cables to the T-con board and powered again.No backlight this time - just Continuous alternating orange(amber) and green light. I can't find any reference to this in the service manual or on the web.What did I mess up?

author: wraper
author_rank: Unknown
timestamp: October 19, 2021, 11:33:39 am
content: If you return the original board, does it work as it did previously? All of those T-CON boards on ebay are pulls from scrapped TVs, very likely untested. So there is a large chance you received a faulty board.

author: DavidAlfa
author_rank: Super Contributor
timestamp: October 19, 2021, 01:17:33 pm
content: Emmc issues are common in these models.Simply replacing and programming the emmc is not enough, the system is linked to the emmc unique ID.There's a way, but it's not public, only certain tools can do it.Search "Sony w800(b/c..) emmc" for more info.I have 55w808, crossing my fingers after 5 years...

author: WaynesWorld
author_rank: Contributor
timestamp: October 28, 2021, 10:55:58 am
content: Quote from: wraper on October 19, 2021, 11:33:39 amWith the original board, I get the back light only.According to some other sites, the flashing orange and green means it needs a software update. I downloaded the latest from Sony and followed the procedure in the service manual. The procedure on the Sony official site also included steps to reset. No luck either way.I was hoping to have the second board by now so I could report but still hasn't arrived.Quote from: DavidAlfa on October 19, 2021, 01:17:33 pmI've researched EMMC but can't find too much on it. What is it? How does one program the EMMC, and what more is required that being not enough?
Sony AC-V30 AC adaptor - water ingress - Page 1
Forum section: electronics / repair

author: qu1j0t3
author_rank: Regular Contributor
timestamp: October 17, 2020, 01:53:06 am
content: :-\Hi,Today in cheap but time-wasting purchases: A Sony Handycam TR5 and AC adaptor AC-V30.Camera didn't work. Discovered that the V30 is supposed to be putting out 7.5V but was actually 40V. After opening it, found it that there was water inside (!!). There is no visible damage to components and it didn't blow the fuse, but it appears that it will permanently be 40V now. The controller IC is on a perpendicular riser board and may not be damaged, but anything could have done wrong on the high voltage side… though I'd think if the transformer had shorted, the fuse might have blown. Anyone ever repaired one of these?The camera is another matter… I've ordered the service manual and I don't relish working on miniature electronics.

author: akimpowerscr
author_rank: Regular Contributor
timestamp: October 17, 2020, 12:36:42 pm
content: The first and best advice I could give you is to simply buy another charger.We can find it very cheaply, more or less 15 bucks ....But if you really want to fix it, the first thing to do is rinse it in distilled or deionized water, dry it very well.Watch out for water that remains below the components.It would then be necessary to make an insulation measurement between primary and secondary circuits with a 500V megger.If the insulation resistance is greater than 10 Mohms, you can test it by supplying it with 230Vac.Beware of the dangers of electrocution, if you are not qualified, never supply the charger with its case open.Measure the no load output voltage ..... if it is not 7.5V, it is better to abandon this repair, it is not worth it.
Sony AX-8000 Digital display / radio - Page 1
Forum section: electronics / repair

author: Carl E
author_rank: Regular Contributor
timestamp: August 12, 2021, 07:01:44 pm
content: Hi,Looking to see if anyone has any experience with this display. It's installed in a RV with cameras attached to see the left, right and backup. The display plugs into the main unit straight in. Unfortunately, the adjustments are up/down, tilt +/- 10 deg, in/out. There is no left/ right. The display is totally washed out from light from the passenger window making it useless for lane change and backup. Sony can not or will not provide any information on an extender cable or flex strip to add from the main unit to the display. The mechanical bracket is not an issue, its the electrical part that is the problem. I hesitate to disassemble anything because its still under warranty.Thanks

author: Rasz
author_rank: Super Contributor
timestamp: August 12, 2021, 08:36:46 pm
content: glue a paper sun cover to the size, problem solved
Sony BDV-E880 CEC/ARC not working - Page 1
Forum section: electronics / repair

author: kgvelkov
author_rank: Newbie
timestamp: April 24, 2021, 02:32:21 pm
content: The TV that was connected to the audio system was unfortunately killed by an electric shock some months ago.When I replaced it with a new one, I found out that the CEC function doesn't work anymore, no matter which TV I hook up the system to.However, I should note that there is a picture from the device. I've confirmed it's not the TVs, because my Chromecast controls them just fine.I found the service manual for the device and disassembled it, but there's nothing immediately obvious.I've also tested the resistors near the HDMI port, all of them have tested with the correct values.My only guess is that it could be either a capacitor (I'll be testing them tomorrow) or the HDMI port itself?However, if it's neither, I'm not sure where to continue from there. Could anyone give a tip? Thanks!
Sony Bravia KDL-52VE5 Repair Help/Red LED Flashes 6x - Page 1
Forum section: electronics / repair

author: dklemmer
author_rank: Newbie
timestamp: December 23, 2024, 01:23:25 am
content: Hi Folks,Newbie here with limited experience trying my hand to figure this tv out.Similar to edy's post from late 2017, I recently acquired a Sony Bravia KDL-52VE5 LCD TV, circa 2010. 5-10 seconds after startup, the red begins flashing 6x. I have 25v going through J6711 to the three VCC pins, through a 9 pin cable to the LH inverter board. The Protect pin has 5.9v before the red LED begins flashing, then there is 0V.If I disconnect the cable to the inverter board, all the backlights come on. I don't know if there is sound or any picture, I only see light coming through the case.Would anyone have suggestions or even a service manual with readable schematics?Thanks!D.

author: Paceguy
author_rank: Regular Contributor
timestamp: December 23, 2024, 06:29:32 pm
content: I re-flowed the circuit boards on mine and everything has worked fine since then.

author: dklemmer
author_rank: Newbie
timestamp: December 23, 2024, 08:35:30 pm
content: Thanks Paceguy,Which circuits boards are you referring to?
Sony Bravia XBR-65X900E TV Repair - Page 1
Forum section: electronics / repair

author: DDock
author_rank: Contributor
timestamp: July 29, 2022, 05:14:23 pm
content: Sorry if this is a duplicate post. When I tried to post, but it would just take me back to making a post and I couldn't see anything under my account were the previous post was actually made.I was given this TV as being bad and I'm trying to figure out if this will be an economical repair. I have a feeling the issue is with either the processor board or the T-Con board, but not sure which one would cause this issue.If anyone has seen this before and can tell me which board should be replaced, that would help so I don't just have to buy both, or heaven forbid if the issue is actually neither. You can see vertical sections along with the horizontal ghosting around the selection buttons. There are some artifacts around the "m" in Welcome.
Sony BVM-1410 Monitor Power Thermistor Replacement - Page 1
Forum section: electronics / repair

author: Bradley1023
author_rank: Newbie
timestamp: February 19, 2024, 12:29:53 am
content: Hey Everyone!I had an account here years ago, but it seems to have been deleted from inactivity I guess.Excited to finally get got hold of a Sony BVM, It was cheap enough but that's because it doesn't power on at all.Very quickly evident in the power supply that the protective thermistor TH1 and resistor R92 have got very hot and blown themselves to pieces. And it looks to me the reason for this is the rectifier network capacitor C81 has gone bad.My question is obtaining a suitable replacement for the Thermistor that will continue to provide the right protection. The manual specifies Sony part number 1-800-820-12 and Sonys official part website shows 1-800-820-00 & 1-809-531-11 as useable alternates but none are in production anymore. And I can't find any information on what the exact spec of this thermistor was. Is there a way I can work out what would be suitable based on the circuit?Many thanks in advanceThe service manual power supply schematichttps://archive.org/details/bvm-1410-pm-sm-sony-service-manual-en/page/n119/mode/2up

author: BlownUpCapacitor
author_rank: Frequent Contributor
timestamp: February 19, 2024, 07:10:07 pm
content: Do you know what the fuse ratings are? 1 amp 240v? 2 amps? This will help us determine the ideal current rating of the thermistor.

author: Bradley1023
author_rank: Newbie
timestamp: February 19, 2024, 11:32:58 pm
content: Its still setup for Japanese mains, so the installed fuse is 4Amp/125V. And the manual says to use a 2Amp/250v fuse if switched to 220v-240v use, which I might change to considering I'm in Australia.Some pictures for you of the board and whats left of the thermistor. The degaussing relay certainly felt the pinch to!
SONY BVM-9044D power button repair - Page 1
Forum section: electronics / repair

author: naujoks
author_rank: Regular Contributor
timestamp: May 16, 2023, 10:15:31 am
content: I have a SONY BVM-9044D with a faulty power button. When pressing it, it won't stay in the engaged position but goes back to "off" when letting it go. When pressing it and holding it, it works fine.As a workaround I wedged the button in the "on" position with a match and I turn the monitor on by means of plugging it in.I'd like to repair it though. Can the button be repaired or replaced with a new part? On the outside the button looks like the square version that can be found on virtually all PVM/BVM monitors.

author: FIXITNOW2003
author_rank: Regular Contributor
timestamp: May 17, 2023, 06:11:14 am
content: some picture of the switch would help ,but it will probable that you will need to source a replacement
Sony BVM20F1U ABL Circuit activating OVERLOAD alert. - Page 1
Forum section: electronics / repair

author: Mantrox
author_rank: Newbie
timestamp: July 30, 2020, 03:54:19 pm
content: Hey folks, complete novice here.I'm trying to pinpoint a fault on this quite complex CRT monitor.The unit, when you power it on, it light's up the OVERLOAD alert and doesn't turn on the tube.In the service manual there's a description of the ABL (Automatic Brightness Limiter) circuit, and it seems thatitis responsible for turning on the OVERLOAD alert when there's a specific problem.Here's some snippets from the manual:Can anybody help me in interpreting what this circuit is doing, and what steps could i take in order to diagnose the problem?Some additional information:Image of the block diagram of the whole monitor.The service manualhttps://cdn.retrorgb.com/assets/monitormanual/Sony_BVM_E_F_Service_Manual.pdfThere are 4 main boards that make up the overall monitor system:BK - RGBS Video InputBC - ISR (CPU\ROMS)E - DeflectionG - Power SupplyThere's also several smaller boards, including the ones mentioned on the diagram:PC - Flyback Transformer BoardPA - I don't know what this one does exactlyI already have switched the G and E boards with other working ones with no effect.I also recapped the PA board, since it seemed to be directly involved with the ABL circuit, also with no effect.Thank you for your time.

author: Mantrox
author_rank: Newbie
timestamp: July 31, 2020, 03:35:15 pm
content: No hope?
Sony CCD-FX300E Video-8 camcorder - no power on CAMERA setting - Page 1
Forum section: electronics / repair

author: philpem
author_rank: Frequent Contributor
timestamp: November 17, 2020, 03:13:22 am
content: I'm trying to figure out if this one's worth repairing...I've got a Sony CCD-FX300E Video-8 Handycam on the bench at the moment. Failure mode is it works fine in playback mode (albeit with poor video quality and occasional loss of sync). Switch to Camera and the camera begins to start up, then quickly shuts down.Has anyone worked on Handycams of this vintage (circa 1994)?Are there any common trouble spots?CheersPhil.

author: Rasz
author_rank: Super Contributor
timestamp: November 17, 2020, 05:55:40 am
content: unsurprisingly capacitors

author: samnmax
author_rank: Regular Contributor
timestamp: November 17, 2020, 09:28:31 am
content: Quote from: Rasz on November 17, 2020, 05:55:40 amExactly. I have in a similar Sony model in storage (can't recall, maybe the same model), and it has all SMD electrolytics leaking all over the PCB.

author: philpem
author_rank: Frequent Contributor
timestamp: November 17, 2020, 12:52:46 pm
content: I suspected as much.In that case I figure this one will end up on the scrap pile. Price for one refurbished and working is only £20, the capacitors and time spent will probably be far more than that. The smarter money's in grabbing a Digital8 deck, digitising all the tapes and re-selling the D8 camera.CheersPhil
Sony CD  - Page 1
Forum section: electronics / repair

author: ann2954
author_rank: Newbie
timestamp: June 02, 2025, 04:00:52 pm
content: Does anyone know where I can get this part and/ or can it be replaced?Thank you

author: AndyC_772
author_rank: Super Contributor
timestamp: June 02, 2025, 04:18:41 pm
content: Donor unit or 3d printer?

author: temperance
author_rank: Super Contributor
timestamp: June 02, 2025, 05:57:08 pm
content: Something like this:But with more steps to copy the still good part of the gear wheel.

author: ZGoode
author_rank: Frequent Contributor
timestamp: June 02, 2025, 06:44:25 pm
content: 3D printing is 100% the way to go here. Shouldn't be too hard to model up in CAD if you know how many teeth and OD/IDI did a similar fix for an OG XBox CD drive. Although FDM might not have the resolution needed. Might need to get it printed in resin or polyjet

author: David_AVD
author_rank: Super Contributor
timestamp: June 02, 2025, 08:28:19 pm
content: I searched for "Sony CD Roulette Gear" and found this 3D print:https://cults3d.com/en/3d-model/gadget/sony-cd-player-gear-wheelThere were also people selling ready made ones on eBay and Etsy.AliExpress has them too. Look for "Sony CD Gear" on there and match from the pictures.
Sony CDP-C425 CD changer not powering up properly - Page 1
Forum section: electronics / repair

author: amptub3ss
author_rank: Newbie
timestamp: February 06, 2023, 08:15:47 pm
content: Hello,I have a Sony CDP-C425 5-CD changer that sometimes works totally normally, but most of the time it will only show the tracks grid on the screen when it's powered on. The grid appears immediately when the power is turned on but then nothing more happens. This issue has gradually got worse and now it doesn't start up most of the time.I measured the power supply output voltage and it seemed reasonable. Any ideas on what could be wrong?

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: February 07, 2023, 01:38:30 am
content: Solder connections, grounds, power supply or?Jeff

author: David_AVD
author_rank: Super Contributor
timestamp: February 07, 2023, 09:26:49 pm
content: The grid section may be wired to always be on with power, so it could be that the micro is just not running when the rest of the display is blank.I just grabbed the service manual from Hi-Fi Engine, but other sources may have it too.Check the voltage to IC401 and also make sure /RST is high. You can find this signal on pin 13 of CN301 (should be on front board). It comes from pin 5 of IC202 on the main board.Some of these models develop cracked solder joints on the main PCB, especially around the RCA sockets and in the power supply section.

author: amptub3ss
author_rank: Newbie
timestamp: February 07, 2023, 10:09:45 pm
content: Thanks! Now I also found the repair manual. I noticed that if I disconnect the flex cable going to the BD BOARD with IC101 and IC102, it will start up perfectly. I can't see any obvious issues on this board, and there are motors attached to it so I guess I need to figure out how to remove it. The laser assembly seems to be attached to this board.

author: David_AVD
author_rank: Super Contributor
timestamp: February 08, 2023, 10:13:54 am
content: That may or may not be related to the issue. I still suggest checking /RST line and carefully resoldering any cracked joints.
Sony clock radio buttons not working - Page 1
Forum section: electronics / repair

author: tippytappy
author_rank: Newbie
timestamp: August 23, 2023, 08:36:36 am
content: Hello everyone. I have a Sony clock radio, model XDR-DS21BT with a strange problem. The display works and I can play music through it via bluetooth with a phone that was already set up. But none of the buttons work (and there's lots of them on this model). Volume, function etc. they do nothing. I've tried Sony support but they just sent me the manual. I tried Quora but the answers I got haven't worked. If it was totally dead I'd accept that but since it's alive in some respects I'd like to try to get the buttons working so it's more useful.Any advice you can offer would be great appreciated.

author: madires
author_rank: Super Contributor
timestamp: August 23, 2023, 11:28:13 am
content: Do you have any experience with repairing electronics? Which tools do you have (DMM, etc)?

author: xrunner
author_rank: Super Contributor
timestamp: August 23, 2023, 12:04:52 pm
content: Quote from: tippytappy on August 23, 2023, 08:36:36 amSony ain't going to help you with this.If youreallymean none of the buttons are workingat all(not intermittent, i.e dirty), but the main function (radio) is working, I'd say it could be a loose ribbon cable. Some of these devices have a main ribbon cable that will have a fan-out along the way to serve the top and other side buttons of the device on their own little PCB. If the cable is loose at the main PCB then the buttons won't work. If you can open it you can check it out, but it's up to your skills to do so.

author: tippytappy
author_rank: Newbie
timestamp: August 23, 2023, 02:45:26 pm
content: Hi, thanks for replying. I have no electronics repair experience or specialist tools unfortunately. I'm willing to take it apart (I've already tried), blow dust out, look for obvious stuff etc. And I'm willing to follow instructions. But I'm clueless by myself.

author: tippytappy
author_rank: Newbie
timestamp: August 23, 2023, 02:48:24 pm
content: Hi xrunner, thanks for the suggestion. I'll try that. I had the cover off recently but didn't do the whole way of disassembling the innards because I was hoping there was some 'magic' fix; hold down x+y button while switching off+on or the like, to reset something. Seems there isn't so I'll look for a mechanical issue.

author: madires
author_rank: Super Contributor
timestamp: August 23, 2023, 03:21:40 pm
content: And please post some pictures! Maybe we can spot anything obvious.
Sony CMD-Z1 (and plus) batteries QN-022BP and QN-023BP measure cells replacement - Page 1
Forum section: electronics / repair

author: sv3ora
author_rank: Regular Contributor
timestamp: December 02, 2020, 07:22:13 pm
content: Hi I have 2 sony phonesCMD-Z1 (battery Li-ion QN-022BP 7.2v 730mAH)CMD-Z1 Plus (battery Li-ion QN-023BP 7.2v 600mAH)Both of these are 2-terminal battery packs.1. I have a few QN-023BP spares but after 25 years the batteries are almost dead.How can I measure which of them is more alive than the others? Load them with some kind of resistor and measure the voltage? Please give me some info on this.These packs can be opened easily, so I think I can expose the cells inside and possibly change them.2. Suppose I change the cells with Li-ion ones, can I use the same sony charger used in the original batteries or there is some kind of "magic" that must be used on proprietary companies cells?3. What if the cells I get are of higher capacity, can I still use the charger I have and wait for more time for them to charge, or I should not do it at all?4. What If I find a Li-Po Cell, can I use the Li-ion charged to charge Li-po or a special one is required?
Sony D-511NE Discman "Hi DC In" error - Page 1
Forum section: electronics / repair

author: Rooster Cogburn
author_rank: Regular Contributor
timestamp: February 02, 2025, 10:02:34 pm
content: So, I'm a bit stumped with this one. This is a portable CD player that always displays the error from the subject line on it's display. This indicates that the user connected an out of spec DC PSU over the DC jack. It only does that, no other behavior like activating the focus servo when the lid is closed. It also does this when power is supplied over the battery compartment. Initially I had it show the 'Walkman' logo boot animation, but now it does nothing on either power supply option but show the error when the lid switch is engaged and the play button is pressed.Here's the full service manual:https://elektrotanya.com/sony_d-ne511.pdf/download.htmlThe player had pretty bad corrosion due to a battery leak. I cleaned everything as good as I could, fixed some traces, ran some bodges for a dead via and re-attached a knocked-off inductor and its neighbor with corroded pads:The error persists, though. None of these circuits should be responsible for it anyways.The player had apparently a previous repair attempt. The lid springs were missing and the lid was cracked to facilitate removal from the base plate hinge to access obstructed screws. Apparently I'm not the only one having issues opening these modelsFrom what I understand, the main micro MCU type chip does the DC voltage sensing on Pin 95:It's ~1.8V with DC power from the official unregulated PSU 4.5V (so more like 6V with little load) and around ~40mV when injecting 3V with a bench PSU over the battery contacts.I checked the circuit that generates the DC monitoring voltage:From what I can tell in-circuit the involved resistors seem Ok, nothing measures higher than the rated resistance. None of these areas seemed particular affected by the battery acid.The service manual doesn't indicate what the expected levels are and what is supposed to be measured at the test points. I have a second know-good mint condition unit that I haven't opened yet due to the risky nature of the opening procedure of these players. Working on that.Not really sure how to proceed here. It seems the DC high error is present at a wide range of values on the sense pin, maybe I'm missing something here.

author: Rooster Cogburn
author_rank: Regular Contributor
timestamp: February 03, 2025, 10:13:55 pm
content: Ok, partial success: After a lot of debugging a found a via that seems dodgy. Supplies VCPU to the IC801. Should be 2V, was often just 1V. Seems like this is what tripped the DC voltage alert. Sometimes it would actually all work fine and I even had the player boot, detect a disk, read the ToC and start playing, only for it to error out again seconds later and then revert to doing nothing at all. After running a bodge between the 0Ohm resistors right between the dogy via and Pin 100 to the ferrite bead it should connect to the player reliably boots, detects the disk and reads the ToC with both power supply methods. Can't get any further since the buttons have stopped workingFigure there's some more corrosion to fix there.
Sony DSC-RX0M2 service manuals level 2 and 3 - Page 1
Forum section: electronics / repair

author: vnegens
author_rank: Newbie
timestamp: March 16, 2023, 12:31:16 pm
content: Hello,Would somebody have the service manuals for the Sony RX0M2, please?I'm also looking for anybody that could have an archive of all previous firmware updates for this camera.Thanks.
Sony DVD player model DVP-S550D diagonal lines. - Page 1
Forum section: electronics / repair

author: Paceguy
author_rank: Regular Contributor
timestamp: June 08, 2024, 05:28:50 pm
content: My Sony DVD player model DVP-S550D has a problem. When first powered up, the image has thin or fine diagonal lines across the entire screen. As it warms up, the lines appear to get more faint and eventually disappear. It takes between 30 - 45 minutes for this to happen. It works ok until it's shut off but the problem re-occurs the next time that it's powered on.Could this be a problem caused by a bad capacitor or something that's off value and corrects once it heats up?Has anyone seen a similar problem with this model or any other model or brand? I own an ESR tester and was thinking to check all the electrolytic caps. Should I use my scope and if so what should I look for?Thanks in advance.

author: Paceguy
author_rank: Regular Contributor
timestamp: June 10, 2024, 10:36:59 am
content: Anyone?

author: Haenk
author_rank: Super Contributor
timestamp: June 10, 2024, 12:38:32 pm
content: Does this error move with the player? I.e. attached to another TV, does it show the same lines?If yes, I would assume a PSU "weakness", probably smoothing cap.However: as this is a switching PSU, high voltage is present, so poking around is lethal, unless you know what you are doing.Elektrotanya has the service manual including full PSU schematics (and measurement instructions throughout the whole unit, with waveforms). Maybe check the output signals according to service manual first, you will need a scope.

author: jzx
author_rank: Regular Contributor
timestamp: June 10, 2024, 02:44:25 pm
content: It can be ripple on the power supply. If you have an oscilloscope, check all the power supply voltages to see if they have too much ripple. Often this is caused by an electrolytic capacitor whith excesive internal resistence (cooked).

author: jzx
author_rank: Regular Contributor
timestamp: June 10, 2024, 03:02:39 pm
content: Of course, do this check only in the low voltage side. The big capacitor in the input side usually does not fail, if you want to check, do with the esr meter.As you say that can be a problem related with temperature, give time to the dvd for heat, unplug and check the temperature of electrolytic capacitor. High esr ones tend to be hot.
Sony ERA-110B Recell - Page 1
Forum section: electronics / repair

author: TonyBe
author_rank: Regular Contributor
timestamp: July 14, 2020, 12:19:17 pm
content: Hi folks,i once again run into a problem which i cannot solve by my self after hours of research and fiddeling with the hardware.I'm currently having a Sony Aibo RoboDog on my bench which works perfectly, except the dead batteries. This batteries are "Sony ERA-110B".After ordering fresh LiIon cells for the battery and fitting them into the plastic enclosure, i'm getting no voltage at the output. When trying to charge the battery, the station just shows "End of Life detected". Since the cells are definetly charged, there must be some FET Transistors on the electronic which kills the output voltage when the battery is stated "empty" (even though the cells are charged).After searching on google, i quickly found this guy, which does a great job on recelling the packs but sadly stoped his service last year. He have designed a reader tool for the batteries and provides the src to that:https://aibodoctor.com/2017/11/10/aibo-battery-refill-tool-for-era-110b/Even though it's a very great job that has been done there, there is not much information about the functionality in detail. He says that the pcb needs to be replaced once the battery is empty,.. but i really want to find out, why (and if it's possible to "reset" the hardware in any way).If I understand this correctly, there is a COM between the battery and the charger which gives a lot of information about the cell. To do this, a one-wire HDQ interface is used. Since non of the components on the batterys PCBs is labeled, i have no idea, which chip is doing that job there. I'm starting to think, that the controller on the pcb does have some kind of write protection on the registers, which forces a new PCB to be designed and takes care of charging controll a.s.o.Now my "question" (kind of):does anyone of you have any kind of information about the battery electronics? There is one big IC on the pcb (36-QFN) which says "SHARP LU5K811" on it,... can't find anything about that.. Does anyone of you may have some ideas what to do next?Really looking forward to your sugestionsThank you all in advance!Kind regards!Tony

author: amyk
author_rank: Super Contributor
timestamp: July 15, 2020, 12:09:40 am
content: If you look at the battery management ICs which do have datasheets (e.g. TI BQxxx series) you'll find that they do have self-destruct functionality and tamper detection as well as "password" protection (although for the laptop batteries that these are widely found in, someone may have bruteforced it.) It sounds like yours has a permanent protection, hence the need to replace the board with a new one. There is also a fuse that gets blown. Do research into laptop battery recelling for more information.
Sony G 500 Multisync Monitor - Page 1
Forum section: electronics / repair

author: Sabot68
author_rank: Newbie
timestamp: May 11, 2023, 04:48:48 am
content: HI all,About 12 months ago my Trusty Sony G500 Mulitsync monitor died, I have been using it in an arcade machine build to run MAME.it was working fine then there was a kind of high pitched squeal and the monitor went black, no pic, no smoke or burnt electronics smell.I assume its something to do with the high voltage part of the monitor. I have opened it up and had a look around, carefully as i know that the tube and associated caps can hold a charge. I have no experience with CRT's so I am reluctant to poke around too much.Is there anybody around the SE Qld area (Ipswich) that would be willing to have a look at it?Or offer any advice on what might be the cause, I have basic electronics knowledge and am handy with a soldering iron and DMM.Any help would be appreciatedAndrew

author: darkspr1te
author_rank: Frequent Contributor
timestamp: May 11, 2023, 02:08:13 pm
content: The first thing i would try is discharge all the caps and replace as many as you can, if it's never had a cap service then it's waaaay overdue for one, high pitch noise is often that failing or the Line output transformer.There are a few voltages you can check like B+ Hot and B- HotFull schematic herehttps://elektrotanya.com/sony_cpd-g500.pdf/download.htmlit has a voltages list and where to check them, worth a look if you can use you DMM.some personal advice , watch a few CRT repair video first to learn how to discharge them first before you stick hands inside, also thick rubber gloves wont hurt.darkspr1te

author: wasedadoc
author_rank: Super Contributor
timestamp: May 11, 2023, 04:28:51 pm
content: I would not assume a fault in the HV area.I would not start by replacing all the electrolytics willy-nilly.The internal fuse is possibly blown. Replacing that is very unlikely to be the only fix needed.I would look to the power supply section, Board G. Quite complex, not really something that an unexperienced person will troubleshoot easily. Check Q630 for shorts.

author: Sabot68
author_rank: Newbie
timestamp: May 13, 2023, 11:20:26 pm
content: yes unless its something obvious trouble shooting this will be a little beyond my skill level.
Sony HT-CT290 independent subwoofer wont power on - Page 1
Forum section: electronics / repair

author: Im_Tesla
author_rank: Newbie
timestamp: October 28, 2020, 03:50:37 pm
content: I've a 15 month old sony soundbar with independent subwoofer. The subwoofer wont turn on but the soundbar works fine. I've taken apart and did some measurements. Power supply board is producing 18.5V, I think main board has some problems. Can anyone help me what's wrong with the sub unit?I've attached the measurements.Second pic is of a component (4WHOVJ20865) which has 18.5V as input but output is 0V. Maybe this component is broken? Can anyone tell me exactly what is this 6 legged component?https://pasteboard.co/JxKzHXC.jpghttps://pasteboard.co/JxKBmft.jpg

author: akimpowerscr
author_rank: Regular Contributor
timestamp: October 28, 2020, 06:32:00 pm
content: Always start with the simplest:have you checked if the coil of your subwoofer speaker is not interrupted?If not:https://fr.ifixit.com/R%C3%A9ponses/Afficher/615901/Subwoofer+on+Sony+HT-CT290+sound+bar+not+working

author: Im_Tesla
author_rank: Newbie
timestamp: October 29, 2020, 01:48:07 am
content: Thanks a lot for the reply.I've checked the sub speaker coil is good.I've gone through the linked post and found that the Ti buck regulator is working fine and producing 3.27V. I think problem is something else.See my 1st picture, I've mentioned the region that has no voltage. What could be causing that?

author: akimpowerscr
author_rank: Regular Contributor
timestamp: October 29, 2020, 09:15:48 am
content: To continue the search for faults, it would be necessary to have the service manual.Unfortunately, I couldn't find it on the internet.Maybe you will have more chances than me?

author: andy3055
author_rank: Super Contributor
timestamp: October 30, 2020, 07:17:48 pm
content: This site seems to have it but one has to make an account there to see the high res files.https://servicemanuals.us/sony/audio/ht-ct370.html
Sony KD-49X9000G black screen  - Page 1
Forum section: electronics / repair

author: Piko87
author_rank: Newbie
timestamp: December 28, 2024, 04:28:27 am
content: Hi everyone,First, Merry Christmas!I purchased a Sony KD-49X9000G almost 5 years ago and I only use it with my laptop plugged in via HDMI. Last night, the connection between the 2 devices went on/off for some time as if the hdmi cable wasn’t working properly so I changed it with a new one but it kept doing it. I then turned off the tv.This morning, black screen, no leds… nothing can be done. I checked the fuse, tried other power sockets, tried all the possible resets I found online (60s push etc…) nothing.The power chord is fixed so I can’t check if that’s the issue unless operating on the tv.Based on all my research, it seems to be a power issue and I’m happy to try and DYI the thing (nothing to lose anyway…) throwing a 5 years old tv makes no sense to me, for principle’s sake. I now wish I still had my old Pana plasma which doesn’t seem to give in after 20 years.Thank you so much for your help if you have any guidance on my problem, have a great day all!François

author: Swake
author_rank: Frequent Contributor
timestamp: December 28, 2024, 09:52:18 am
content: Sounds plausible that there is some issue with the power supply.Crack it open and power on your multimeter.
Sony KD-55X7000E - Insect Infestation Inside LCD Panel? - Page 1
Forum section: electronics / repair

author: Mike Warren
author_rank: Unknown
timestamp: May 01, 2019, 04:12:42 am
content: One of my 2 KD-55X7000 TVs has developed a dark patch on the screen.Sony tell me this is caused by an insect infestation and therefore not covered by warranty.Is this correct? Are the LCD panels not sealed?

author: coromonadalix
author_rank: Super Contributor
timestamp: May 01, 2019, 07:50:46 am
content: The lcd panels aren't totally sealed, they are multi layered components, Ie backlight, light diffuser etc ...https://pid.samsungdisplay.com/en/learning-center/blog/lcd-structureMy solution woud be when the tv is dismantled, it will be a big task, you have to separate the front lcd glass, or slightly lift it...Try a can of compressed air, not air from a compressor (you may have oil residues in it) to see if you can move itbut the warranty will be void unless you do it cleanly, no markings no scuffs etc...

author: Kjelt
author_rank: Super Contributor
timestamp: May 01, 2019, 09:13:27 am
content: I have this issue with a Dell monitor where some ant crawled in and died.Very difficult to remove, I dismantled it and used compressed air etc. but did not dare to remove the plates from each other.

author: Mike Warren
author_rank: Unknown
timestamp: May 02, 2019, 10:03:07 pm
content: Quote from: coromonadalix on May 01, 2019, 07:50:46 amThat's more work and risk than I want to go to unless the only other option is to buy another TV. I think I'll just live with it for the moment.I'm just surprised that there are gaps for insects to get in.
SONY KD65X7000E - Page 1
Forum section: electronics / repair

author: geobee
author_rank: Contributor
timestamp: February 20, 2022, 06:00:34 am
content: Hi all, any tv techs out there who have performed back light replacements in LED sets. I have been given the challenge of doing the stated model, and just wondering if anyone has had the pleasure of doing one. It is an ''edge'' LED system, and any advice would be great. Owner doesn't care if the job is a success or not, as he was going to discard it originally.
Sony KV-4000 Portable Trinitron Reciever adjustments - Page 1
Forum section: electronics / repair

author: ultimatekaiser
author_rank: Newbie
timestamp: July 09, 2020, 11:28:13 pm
content: Hey all,I recently got one of these receivers, and it still works and is in pretty decent shape. it has a few minor scuffs in places, and the buttons don't work and need to be fixed. Also, (obviously) the rechargeable battery is long dead, but the set still works fine otherwise. The image is quite nice but it needs some adjustments, and I was hoping someone here might have a copy of the service manual and schematics for it, and that they might share some of their expertise with me. I know a bit about how TVs work, but by far no expert. Most of the deflection is on the upper board inside the CRT cabinet it looks like, but not all of them seem to be controlled by pots, and are probably based on specific cap values and such.The colors and such are all superb, but the geometry is off and the horizontal position is a bit off as well. The image is shifted to the left a bit, cutting off the left side of the screen a little and the horizontal and vertical image looks ever so slightly pinched at the center. The colors, particularly red, seem to smear a bit to the right as well just a tiny bit, so I think there are possibly some parts that have drifted with age.Any help or insight would be appreciated!
Sony mdp-550 laserdisc no power/capacitor question - Page 1
Forum section: electronics / repair

author: matt.zepess@gmail.com
author_rank: Contributor
timestamp: August 01, 2023, 02:20:29 pm
content: Went to play a movie and the disc kept speeding up and down maybe playing once every several tries, took the cover off to test while visually looking at it taking the disc and it kicked the bucket within the 10 feet I moved it. Now I get no power, went ahead and inspected all boards and only seeing one capacitor leaking, cables are all secure aswell. Tried scrubbing away the fluid but still getting no power. I know these units are famous for capacitor issues as with all Sony laserdisc players. Can one cap make the whole unit not power up? Part of me thinks it could be a further issue, part of me says change the bad cap and the 2 of the same variety right next to it, and the last part of me says recap the whole board albeit it would be disappointing if it doesn’t work after all that time and money. If I do the repair I plan to do it once with nichecons so cheap caps and swapping over to good quality isn’t really ideal. What do yall think with your more generalized knowledge. I understand nobody’s gonna be an expert on these nowadays but im not sure which part of my gut is the smartest to go with.

author: wasedadoc
author_rank: Super Contributor
timestamp: August 01, 2023, 04:50:38 pm
content: Replace that one cap and see if the player comes back to life.

author: benj38
author_rank: Frequent Contributor
timestamp: August 03, 2023, 06:16:49 pm
content: A single leaking capacitor can indeed bring down the whole unit.Assuming you have no way to test caps for ESR and capacitance, the best advice, from years of experience, I can give you is to replace that cap and the other two similar ones. Recapping the whole board is an overkill and rarely necessary.
Sony MHC-W55 fm presets lost after unplug from wall socket - Page 1
Forum section: electronics / repair

author: deepaksetohul
author_rank: Newbie
timestamp: March 17, 2023, 04:28:42 pm
content: HELLO .. my Sony MHC-W55 fm presets are lost when the unit is unplug from power.. Thanks send help

author: theHWcave
author_rank: Regular Contributor
timestamp: March 17, 2023, 06:30:13 pm
content: I suppose the main unit (not the remote) has a battery. After all, it appears from a quick glance at the manual the clock keeps running even if the power is lost. That battery is probably also used to store other settings. Sadly it is nowhere mentioned and it has probably finally died. You would need to open the thing up and look for it. If you are lucky its one of those CR2032 coin cells in a holder like PCs use for storing BIOS settings. It may be soldered in. I have seen that in a couple of motherboards and other electronic gear

author: SeanB
author_rank: Super Contributor
timestamp: March 17, 2023, 07:14:34 pm
content: Sony also used supercapacitors there, normally 0.22F 5.5V rated, you would find 2, one for the RTC and the other doing the presets. they do fail, or there is a CR2016 soldered to the board.

author: deepaksetohul
author_rank: Newbie
timestamp: March 18, 2023, 06:01:30 pm
content: Thanks ... it indeed used a supercapacitor and in the MHC-W55 is the C501 thats needs to be changed
Sony Mutaki Protect Mode - Page 1
Forum section: electronics / repair

author: Tumatauenga
author_rank: Newbie
timestamp: November 22, 2019, 06:50:30 am
content: So I have Sony Mutaki STR-KM7 and after being plugged into a specific power point in the house, we heard a big zap and now when you try to power it on, after a few seconds it goes into protect mode and shuts off (a similar situation has happened with a TV of ours and the same power point).How do I figure out what specifically is causing the issue? I've tried testing all of the IC's and the emitter resistors like the guy in the youtube video I was watching but mine all seem to be fine. What do I do next?

author: bingo600
author_rank: Super Contributor
timestamp: November 22, 2019, 05:07:33 pm
content: How old is it ??I had a STR-DB925 doing a large beep & overload , on most of the "turn on's"Solved by resoldering all the relay connections inside/Bingo

author: Tumatauenga
author_rank: Newbie
timestamp: November 24, 2019, 12:17:19 am
content: A fair bit Over 5 years old now, I can't see any obvious signs of something being blown or anything like that.