hybridfree/eevblog-posts huggingface dataset:
Pioneer M-790 - Page 1
Forum section: electronics / repair

author: SAS73
author_rank: Contributor
timestamp: August 18, 2023, 05:02:38 pm
content: Trying to fix 4 ch. Pioneer amplifier,Output transistors was shorted, replaced transistors, emmiter resistors and driver op-amps, noticed no voltage on op-amps +-12v.Protection IC PIONEER PAC006C not providing op voltages ( mute circuit?)Any ideas to how to address this issue? I can't even find a datasheet for that IC.PS Replaced that IC, same issue.

author: benj38
author_rank: Frequent Contributor
timestamp: August 18, 2023, 07:32:03 pm
content: Here is the M-790 service manual with schematics:https://ia904501.us.archive.org/32/items/manual_M790_SM_PIONEER_EN/M790_SM_PIONEER_EN_text.pdf

author: SAS73
author_rank: Contributor
timestamp: August 18, 2023, 09:50:15 pm
content: Thanks for replying.I got the SM already , what I am looking for is the DATASHEET for Pioneer PAC006C protection IC, and maybe advice to how to troubleshoot protective circuit.The best I can understand this particular IC7201 inhibit OP amp voltages (+-12V) to go to preamp OP amplifiers.

author: m k
author_rank: Super Contributor
timestamp: August 24, 2023, 12:49:15 pm
content: If OP +/-12V is 0V it clearly indicates a mute situation.But you can't say how real that is.Have you measured any other voltages that are given in the manual?
Pioneer service remote GGF1067 using android IR blaster - Page 1
Forum section: electronics / repair

author: abhi1981
author_rank: Regular Contributor
timestamp: May 02, 2022, 06:38:53 am
content: Hello,I am planning to make a Pioneer service remote GGF1067 using my phone's IR blaster (Mi A3). The codes are available athttp://www.remotecentral.com/cgi-bin/codes/pioneer/cld-v2600/.But the codes are in Pronto hex format, which the android remote apps don't recognise.Is there any android app which recognises pronto hex?Please help.

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 02, 2022, 08:54:59 am
content: Worth reading:http://www.remotecentral.com/features/irdisp1.htm

author: abhi1981
author_rank: Regular Contributor
timestamp: May 04, 2022, 09:04:18 am
content: As per this page >>>http://www.remotecentral.com/features/irdisp4.htmNEC uses a discrete lead in and a discrete lead out, so the total code length will take 34 burst pairs to represent as a Burst Pair Sequence.But how will I apply the above formula to codes on this page >>>http://www.remotecentral.com/cgi-bin/codes/pioneer/dvl909/page-1/There are 68 burst pairs in this code
Pioneer sx-20K Possible Micro controller issue - Page 1
Forum section: electronics / repair

author: hazmoment
author_rank: Contributor
timestamp: April 17, 2022, 05:03:21 am
content: Hi, so Ive repaired one of these Pioneer stereo receivers before but this fault has got me stumped. I had the usual output transistors shorted which I've replaced along with some other passives which were efffected also. Ive come to power it up but Im not getting my standby led.There is a handy fault finding block diagram in the service manual, but leads me to asuming IC101 is at fault. IC101 is a: UPD78F0536GK micro controller.the standby transformer is running and 3.3v is being generated and regulated and is present at IC101, I should also have the pin relating to the standby led high, but is not. and I get no display, no sign of life when I hit the power button and it does not respond to a service mode "reset"either. I have gone ahead and replaced the MicroController not once, but twice from two sellers on Ali Express. And i have the same result. What should I be doing to move forward with my fault finding, and am I missing something obvious, i.e does this micro controller need programming before it will work?Hope someone can advise, I have only been able to determine 3.3v is present and the 3.3v on the power button pin goes low when switched on. CheersLink below to Service Manual which is actually pretty good and a full schematic is towards the end of the manaul:https://www.manualslib.com/manual/1911908/Pioneer-Sx-20-K.html?page=13#manual

author: David_AVD
author_rank: Super Contributor
timestamp: April 17, 2022, 07:19:47 am
content: The chips you bought as replacement microcontrollers would have been blank surely? That would explain why is does SFA now.Maybe the original micro was ok and you were (are) missing some critical signal such as the "power good" line?

author: hazmoment
author_rank: Contributor
timestamp: April 17, 2022, 07:57:14 am
content: Cheers David. You have basically confirmed my suspicions on the micro. I know nothing about them... So i guess they are programmed very specifically for the task in hand, and to have a blank one programmed by a third party would be uneconomical? So I guess its a good time to stop fault finding then..

author: David_AVD
author_rank: Super Contributor
timestamp: April 18, 2022, 08:29:50 pm
content: Unless you can get the original firmware (unlikely) the new micro is of no use.Is the original one destroyed?

author: Chris56000
author_rank: Frequent Contributor
timestamp: April 19, 2022, 01:44:17 am
content: Hi!The datasheet (if you could call it a "sheet!") runs to 983 pages, but it most definitely indicates this device contains flash memory and therefore would require programming before it could be used in any application, so a new device from Ali, etc., would be useless in your receiver!I would refit the original one back and look for a fault elsewhere – it may not necessarily have been destroyed!Chris Williams
Pioneer VSX 1131 over current protection - Page 1
Forum section: electronics / repair

author: Bigmike247
author_rank: Newbie
timestamp: March 14, 2024, 05:19:41 am
content: Hi Everyone,Noob here, hoping someone could help me out.My Pioneer VSX 1131 AV receiver went into protection mode while playing the other day.It now goes through diagnostic mode when turned on,and displays an error NG: (for all 7 channels)When I check the error, it shows: DET.PROTECT:IFrom the service manual this indicates over current detected, however the fact that it show this for all 7 channels seems a bit strange.If I cancel diag mode, the receiver will turn on and function OK, however I am not sure if that is safe to operate it with diag mode off?I have checked the main PSU (photo and diagram attached of PSU) and the +12VST pin shows 11.8V when receiver is in Standby, when turned on, this goes up to 17.8V. Is that too high or normal for AV receiver supplies?Could this high voltage possibly cause a false over current error on one of the other boards?If this is too high voltage,I checked the resistors marked in YELLOW on the diagram, they seem OK. Any other components I should check?Any suggestions to what I should test would be great.I'm not an expert, but know basics and can test some components with guidance.P.S I roughly checked all the large main transistors on the main board for all the channels, and didn't seem like any was shorted out.Thanks!

author: m k
author_rank: Super Contributor
timestamp: March 23, 2024, 02:03:09 pm
content: I can't find the page where those protection wires go.It clearly says earlier that there are separated checks for all channels.Picture (p18/113) is also included, but no schematics.Page 34/113, around a center of the top, has those protection signals to MCU.Maybe problem is there since all channels are the same.
Pioneer VSX-323-K not powering up - Page 1
Forum section: electronics / repair

author: Dr.Wily
author_rank: Newbie
timestamp: April 20, 2022, 02:05:19 pm
content: Hello EEV community !I have a problem with my old AVR companion Pioneer VSX-323-K.it no longer turn on. When I press power button, the power supply board relay clicks then powers off straight (the far right end of the display lights up very briefly then off)- pressing the power button generates a click caused by the relay on the standby PCB- a long press on this same power button, turns on the amp, which goes into protection after a few seconds by turning off and flashing the red "HDMI" LED- by performing a reset (power key + "advanced surround" for more than 3 seconds) we return to the original problem which is that the amp does not turn on.By disconnecting the processor card (HDMI + DSP) the amp turns on and stays on. But no sound is emitted, even with the tuner. Shorting the relay on the standby PCB card will force the amp to turn on and go into protection (HDMI LED flashing).this issue is not directly related to the amplifier card. I have checked absolutely everything in the amplifier and power supply. No component is burnt out or weakened.Do you know where to look? I have no idea.Thanks !

author: David_AVD
author_rank: Super Contributor
timestamp: April 21, 2022, 07:32:16 am
content: Sometimes the small transistors that detect excess amplifier current go leaky and trigger the over current protection. I have seen this with Yamaha and Denon amplifiers before.It will likely be a small SMD transistor wired to one emitter resistor in each channel. There is one transistor per channel. Sometimes replacing them all is the easiest / fastest way to proceed.The service manual should say if the flashing LED is an over current protection. If you can't get it into diagnostic mode, it's often an over current fault.

author: Dr.Wily
author_rank: Newbie
timestamp: April 21, 2022, 01:31:21 pm
content: Hey, tanks for your help !QuoteYes, but there no over current. All voltage are good and the AVR stay on when the HDMI card is removed. The chip who manage protection circuitry and check over current or others is on another PCB.Today, I reflowed some solders on HDMI card and the amp stay on and produce sound. But for powering up I must push the button more than 2 seconds otherwise the amp refuse to powering up and the power supply board relay clicks then powers off straight.Now the amp stay on but there still an issue somewhere who prevent the amp to powering up normally.QuoteI don't how to enter diagnosis mode on this model.

author: David_AVD
author_rank: Super Contributor
timestamp: April 21, 2022, 09:10:47 pm
content: You can download the service manual(s) for it on the hi-fi engine site. With Pioneer, check to see if the manual you download references another manual that you'll also need to download.

author: mzacharias
author_rank: Frequent Contributor
timestamp: April 26, 2022, 02:46:02 pm
content: Sounds like something on the HDMI board is loading down one of the power supplies.
Pioneer VSX-45 Amplifier Wifi Antenna Repair - Page 1
Forum section: electronics / repair

author: Peacefrog
author_rank: Contributor
timestamp: January 30, 2021, 10:21:37 pm
content: I have a Pioneer VSX-45 amplifier - and while I'm not quite sure how it happened, one of the wifi antennas on the rear panel has snapped off while moving it.The part number appears to be ADH7049, but I can't find a source online for it (in fact, I think I also tried a few years back without success). This isn't strictly an electronics repair, therefore - but is there anything to stop me adding a panel mounted BNC on there (possibly with some careful drilling) and adding a third party antenna?

author: perieanuo
author_rank: Frequent Contributor
timestamp: February 01, 2021, 03:49:34 pm
content: hi,of course, you can put any 2.4g antenna mecanically adaptedI also see some electrolyte capacitor in bizare position ...
Pioneer VSX-609RDS faulty "STK" modules, creative replacements - Page 1
Forum section: electronics / repair

author: VanMarco
author_rank: Contributor
timestamp: October 08, 2025, 12:31:44 pm
content: Hello!I bought this amplifier for spares and repair to have fun repairing it.I found an open thermal fuse inside the transformer, and after i bridged that, it turned out. My bad, for not checking, assuming everything was good, i connected a speaker, and it.. fried it. like, literal smoke out of the box!I went checking the voltage on the outputs... 45V on one, 32 on the other, and those were the surround ones. I also found voltage on the normal outputs, about 12v.ampifier schematic is herehttps://www.angelicaaudio.cz/wp-content/uploads//2016/03/Pioneer-VSX-609_709_RRV2274.pdfIt has 2 "pac" modules, very similar to "stk" type. I tested the amplifier with either disconnected, in both chips it gives voltage on the output, even up to 60V.the modules innocently test "good" on a DMM.with BOTH chips removed, i get about 2-2.5v on outputs, removing the INPUT board, it becomes zero. Yet, i dont think thats the source of these high voltages on the outputs.Now, assuming I don't want to buy expensive, and fake replacements from aliexpress I was thinking about changing with something like lm3886, but im unsure if voltage in input is too high.schematics lists 54v unloaded and 35v loaded.any idea/suggestion?Thanks!

author: coromonadalix
author_rank: Super Contributor
timestamp: October 08, 2025, 01:36:57 pm
content: buy some already made amplifiers module / boards from china Aliexpress, temu, etc .... maybe some of them are working with your given voltages ?
Pioneer VSX-923 - "FL OFF" error - Page 1
Forum section: electronics / repair

author: Halcyon
author_rank: Unknown
timestamp: July 16, 2021, 12:21:17 am
content: Hi guys, I'm asking for a friend because he is too lazy and was going to throw this unit out.He has a Pinoeer VSX-923 amplifier/receiver that shuts down shortly after power-on and flashes the FL OFF indicator and previously was also getting the "AMP OVERHEAT" error. Googling suggests that it's temperature or power supply related. I had a quick look inside but it's packed with boards and things. I couldn't see anything that was obviously a thermistor that could be bad. I should point out that the amp doesn't appear to be getting hot at all.Does anyone have any experience repairing this kind of fault? EE-noobs here.

author: floobydust
author_rank: Super Contributor
timestamp: July 16, 2021, 02:45:56 am
content: It takes an incredible amount of patience to rip these apart and fix them. You will likely die in the avalanche of screws, at least for Onkyo's.A real overheat can be from vents being blocked, a dead fan, shorted speaker wiring, or the idle current needs to be checked/adjusted if there is a hot channel. It's only 2mV of bias 8.5mA (measure at the 3-pin test header each channel has) which should not make a lot of heat.The receiver seems to have 7 SMT thermistors on the PCB pads next to the output transistors that mount on the heat sink. 95-105 °C before it shuts down. They are wired-OR in two groups (RADI and TH? =radiator/heatsink for front channels and ? for the surround channels) so finding a dud thermistor a little difficult but you could compare ohmeter readings between channels and see if they agree.Try (not my words):6. SERVICE MODE6.1 TEST MODE - Detected protection historyDuring Standby mode, simultaneously press and hold “MULTI-ZONE ON/OFF” and “ENTER” keys for 5 seconds to enter this mode. Turn off the power to this unit by setting the main volume level to “---dB” and Multi-zone to “OFF”. {tune up/down to scroll through list, fan test does not work}DC Display number of times DC is detected.OL Display number of times OVERLOAD is detected.COM Display number of times COMBINATION is detected. (Detects DC and OVERLOAD simultaneously)XPRT Display number of times Power abnormality is detected.STMP Display number of times AMP overheat is detected.DERR Display number of times Digital Power abnormality is detected.... more diags"Turning off the power or pressing the RETURN key returns to the normal mode. Pressing the RETURN key returns to the normal mode."
Pipe camera locator activation - Page 1
Forum section: electronics / repair

author: DC Jack
author_rank: Contributor
timestamp: October 16, 2019, 10:25:50 pm
content: Hi everyone,I'm playing around with one of those pipe cameras systems that has dead video and it has a spare head from a different model, so dramatic modification will be needed. I have been bench testing the spare camera head and everything seems to work. It has four connections (Gnd, 12v, Composite video, LDE brightness adjust) but I can't figure out how to activate the location signal. I have figured out that it is using something called a Sonde locator and that machines have a momentary switch on the base station somewhere that deactivates the CCD and activates the Sonde 512hz signal so it can be located and in turn know where a supposed pipe blockage it.Anyone here know their way around these camera heads? I'm guessing it's either a signal like a IR remote, or a pull up/down of the video line. I have no experience with these so I'm asking around here before I start to destructively digging into the dead camera as it is a sealed system to make it waterproof.
Pitch Tracker repair - Page 1
Forum section: electronics / repair

author: BigSexy
author_rank: Newbie
timestamp: January 04, 2020, 08:51:53 pm
content: I have a RevFire T1 Pitch Tracker. It took a pitch right to the front of the handheld unit breaking the TFT LCD. I have taken it apart and removed the LCD. My problem is finding a replacement LCD. Now unfortunately the company is no longer in business and the schematics are unavailable at the patent office because of a confidentiality request. I even went as far as contacting the PCB manufacturer for information but received a message from them stating they had no information about components used or anything else. I guess I was hoping they was contracted to assemble the PCB's in house since they made the boards. So if anyone can help me figure this problem out I would be greatly appreciative. I will also say, I have been looking for broken units for sale to take the screen out of. They are just not for sale used, the people that have them, love them and never get rid of them.FYI this system uses baseballs or softballs equipped with accelerometer sensors and small 900 mhz transmitters that send data about speed and ball rotations to a handheld unit. The screen in the handheld unit is what is broken. The screen has 2 rows of data the top row displays the speed in mph. and the bottom row revolutions per secondI had already posted this in the all about circuits forum and got virtually nowhere, so I am hoping more minds will be helpful.ThanksBigSexy

author: BigSexy
author_rank: Newbie
timestamp: January 04, 2020, 09:20:08 pm
content: Sorry for all of the edits and removing pics and relisting them. Having one heck of a time with them tonight for some reason.
PL310 power supply shows ofl on voltage display - Page 1
Forum section: electronics / repair

author: amateur_25
author_rank: Regular Contributor
timestamp: May 31, 2019, 05:44:37 pm
content: I knocked my power supply off my benchNow it shows ofl on the voltage display on power up.What could I of broken?

author: Chris56000
author_rank: Frequent Contributor
timestamp: May 31, 2019, 09:16:21 pm
content: Hi!Have you got the earlier type PL series power supplies in a brown case?The early PL310 uses an ADD3701 ±3.999 count DVM a/d converter & display driver IC, and one large control board in the chassis, whilst the later series uses a much more complex front panel display/control regulator board using an ICL7109/PIC16C55 combination for display, with a switchbank pcb mounted on the front panel, with a small 'driver' board in the chassis near the mains transformer.Service Manuals for both types are available, but I'll need you to let me know which version you have first!Chris Williams

author: amateur_25
author_rank: Regular Contributor
timestamp: June 30, 2019, 07:47:50 pm
content: it's the brown unit I have.I just noticed two axial components were broken off. Unfortunately the components that broke off must of dropped out when I took it apart.Any chance someone can advise on what they were?

author: Chris56000
author_rank: Frequent Contributor
timestamp: June 30, 2019, 08:39:11 pm
content: Hi!Here's the manual you need - unfortunately the schematic is atrocious, but the PCB layout-diagram is clear enough and the parts-lists are clear and complete!The missing items are 1N4003 diodes if you've a lower current PL310 version, or 1N5402 if you've a higher-current PL320 version - your picture suggests thin wires so you need 1N4003s!Chris WilliamsPS!I have a project in mind to draught new schematics for these but regrettably recent illness has prevented me beginning with it!
Planned Obsolescence - Dynamic Obsolescence - Page 1
Forum section: electronics / repair

author: SilverSolder
author_rank: Super Contributor
timestamp: January 20, 2022, 12:48:05 am
content: Interesting video from Veritasium... Nothing new under the sun, planned obsolescence has been with us for around 100 years...

author: whatboy
author_rank: Regular Contributor
timestamp: January 20, 2022, 06:57:05 am
content: Clearlly shows you, there are evil people who just care about money, and nothing else...

author: SL4P
author_rank: Super Contributor
timestamp: January 20, 2022, 07:16:03 am
content: … vs Poor Design,

author: Kleinstein
author_rank: Super Contributor
timestamp: January 20, 2022, 09:09:03 am
content: For the light bulbs the temperature of the filament effects the lamps lifetime and the efficiency. So while it is possible to make light bulbs that last longer, they would also consume more power or give less light. The 1000 h life time may be a reasonable compromise between the costs for a new bulb every now and than and the costs for the electricity. In later times with the cheap bulbs the 1000 hour bulbs were likely a little on the cold side and a bulb running hotter and lasting only 500 hours may have been more economic.Getting a standard for the bulb life, made the bulbs more comparable and this way even helped competiotion and consumers. So while they may have had bad intentions - the result was more like a good thing.

author: HighVoltage
author_rank: Super Contributor
timestamp: January 20, 2022, 09:23:15 am
content: Eastern German light bulbs and those from other east European countries lasted 5000 h or longer. Only the West had the cartels to regulate the lifetime of a light bulb. I think this is not a conspiracy anymore and has been proven fact for many years.

author: SilverSolder
author_rank: Super Contributor
timestamp: January 20, 2022, 04:47:21 pm
content: Interesting how the "fashion" aspect is referred to as "dynamic obsolescence" lol.Is that why Keysight's new instruments are black, vs. the previous white ones? (No prizes for guessing, LOL)

author: whatboy
author_rank: Regular Contributor
timestamp: January 20, 2022, 10:39:18 pm
content: It is also well known that printers and bateries have a counter, when it goes to zero, it is gonsky! even if there is still enough life on the devices!

author: SilverSolder
author_rank: Super Contributor
timestamp: January 21, 2022, 06:41:42 pm
content: Quote from: whatboy on January 20, 2022, 10:39:18 pmIn fact, Canon was charged in a class action lawsuit, for disabling all the functions of a multi-function device when the ink ran out, e.g. it could no longer be used as a scanner because it was low on ink!Lucifer himself will be inspired to innovate and create a completely new level of experience in hell just for the geniuses behind these kinds of ideas!
plasma TV detailed theory of operation - Page 1
Forum section: electronics / repair

author: TheMG
author_rank: Frequent Contributor
timestamp: September 26, 2020, 07:53:04 pm
content: I'm repairing a plasma TV at the moment and while I've located the fault and ordered components already (5 film capacitors on z-sus board toast), I'm interested in learning exactly how these things work. I know it's obsolete technology now but I'm curious to know, mainly because there seems to be a lot going on on the various boards, very high component count and a lot of power devices. What do they all do?Unfortunately, all I can seem to find on Google is nothing more than fairly high-level overviews (aimed at the general public).Does anyone know of a good article with in-depth descriptions of the circuit theory, with timing diagrams and maybe waveforms, explaining how the difference voltages and signals are applied to the plasma panel to create the image, and how each part of the circuit of a typical TV generates these signals.I already have the service manual, but although it does have full schematics and block diagrams and general troubleshooting info, it doesn't actually describe what anything does.

author: drussell
author_rank: Super Contributor
timestamp: September 26, 2020, 08:16:54 pm
content: Some of the LG training manuals have a reasonable overview, likethis 2006 version, for example.
plasma tv power board repair - Page 1
Forum section: electronics / repair

author: ant17
author_rank: Regular Contributor
timestamp: January 15, 2021, 09:44:15 pm
content: hi guys i have a faulty smps for a samsung tv the board is a BN44-00516a. But i am having trouble diagnosing the fault originally it a had 3 shorted transistors and a faulty Infineon-ICE3BR2565JF switch mode ic which were all replaced. I also had to run a wire to lifted pad on the switchmode ic and the short was gone and powered it up but still no standby voltages. So the high voltage side seems to about 320vdc and low voltage isolated side no voltages at all.Without a schematic i feel like i am bashing my head up against a wall my mind doesn't want to give up but where do you draw the line in repair when is something beyond saving? how do you guys get around not having a schematics?i am verry interested in peoples oppinions i have heard from other people they reverse engineer the board but thats alot of work and is worth hassle?

author: KevinA
author_rank: Regular Contributor
timestamp: January 15, 2021, 10:45:11 pm
content: Electrotanya claim they have the schematic, but I have no idea how accurate it is.Personally, I have never bothered to try and repair these types of boards - 90% of the parts will be pure unobtanium; Shove a reclaimed board in it; it is probably cheaper than sourcing the spare parts.

author: ttx450
author_rank: Regular Contributor
timestamp: January 16, 2021, 01:05:41 am
content: what is your time worth?

author: ant17
author_rank: Regular Contributor
timestamp: January 16, 2021, 01:32:40 am
content: ok guys i appreciatate your honest oppinion so its more of a spare parts source than trying to fix it

author: sean0118
author_rank: Frequent Contributor
timestamp: January 16, 2021, 03:56:25 am
content: This might be a similar issue? Which transistors blew up? There's schematics listed in the thread, not sure if they apply to your board or not.https://badcaps.net/forum/showthread.php?t=51520

author: ant17
author_rank: Regular Contributor
timestamp: January 16, 2021, 08:45:01 am
content: ok thank you for your reply

author: KevinA
author_rank: Regular Contributor
timestamp: January 16, 2021, 07:29:17 pm
content: TV repair kits, 107 Drury Ln, San Antonio, TX 78221 do a board repair kit.The Repair Kit Includes:Fuses (2) FS801S, FM802STransistors (4) QS802, QS804, QP804, QP802Integrated Circuits (4) IC801, UQ802, US801Diodes (1) DP802Capacitors (4) CS825, CX802, CX851, CX857

author: ant17
author_rank: Regular Contributor
timestamp: January 16, 2021, 09:12:22 pm
content: ok thanks all you that participated in conversation thank you
Plasma tv problem  - Page 1
Forum section: electronics / repair

author: jacko1970s
author_rank: Contributor
timestamp: August 28, 2020, 04:39:54 pm
content: Hi got a Panasonic th-p42x10a plasma tv red light flash no picture traced the x-sus board was shorted two transistor bad so ordered some but also seen same board on ebay for £4 so bought it. Fitted board screen comes on then after some time could be 30sec 3 mins etc then goes off.All caps look good on power supply board so a bit stuck now as to what to look for any help appreciated.Got a short video of it on then going off but can’t upload hereThanksJason
Plastic terminal covers AXIOMET AX-LCR42A - Page 1
Forum section: electronics / repair

author: ovidiu_vr
author_rank: Newbie
timestamp: July 12, 2024, 03:52:01 pm
content: Does anyone know where I could buy these red and black plastic terminal covers as in the picture below? Maybe someone knows a part number.

author: m k
author_rank: Super Contributor
timestamp: July 16, 2024, 04:12:12 pm
content: I guess one must be a language native to find a correct search phrase.Shrouded straight banana Jack pcb mount as a phrase had many results, but no cheese.

author: Poroit
author_rank: Frequent Contributor
timestamp: July 17, 2024, 07:51:37 am
content: Try searching for "Shrouded Banana Plug Receptacles with Skirt"Good luck

author: ovidiu_vr
author_rank: Newbie
timestamp: July 17, 2024, 03:01:40 pm
content: I searched on ELECTRO PJP website and other website. Maybe banana socket for 4mm diameter. I taked page by page in their catalog "Test & Measurement", nothing similar to mine own LCR. Axiomet does not sell to me. They don't even have an email address. I asked people from TME and they told me that they don't have it. I think I'll start drawing in 3D and then I'll see where I will make them.

author: Poroit
author_rank: Frequent Contributor
timestamp: July 18, 2024, 04:51:55 am
content: Try Pomona 73096 4mm Safety Jack for PCB
Play Station 2 Slim Cannot Read DVD - Page 1
Forum section: electronics / repair

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 18, 2023, 04:44:18 pm
content: i tried to repair this but still unsuccessful... internet suggesting replacing laser unit which i did, twice! both laser still cannot read. i managed to twist adjustment screw on 1st laser unit purchased. and slightly able to read dvd games, but it was only for a moment and next power cycle it cannot read anymore. thinking laser unit expired, i bought the 2nd laser unit, same thing, so i suspect something else is broken but i'm unable to get clue from internet. nor i have no clue yet as to where to probe he problematic signal. any of you have done this? or have any educated clues? where can i probe laser eye pattern? the net only provides diagnosis of much older PS1 unit.. need quick help here. cheers.
Playstation 2 FAT Multi AV Port - Page 1
Forum section: electronics / repair

author: ShmoeMo
author_rank: Newbie
timestamp: September 24, 2019, 02:59:57 am
content: Hey guys, not sure if anyone will be able to help but its worth a shot. I am looking for replacement Multi AV ports. I have looked all over Aliexpress, Ebay, Banggood, google and google images but i cannot find any replacement ports, only people who used to sell them before sony shut the doors on them. If anyone could point me to a seller that has them for reasonably cheap or if anyone has any they would sell that would be greatly appreciated as i am dire need of a few for an upcoming repairs. I preferably dont want to buy dead ps2's for the ports as i wont make any money back if i sell the fixed ps2.

author: wraper
author_rank: Unknown
timestamp: September 24, 2019, 03:24:39 am
content: Try taobao. Maybe ask some Chinese member for search term suggestion.
Playstation 4 controller repair - Page 1
Forum section: electronics / repair

author: ArcticPhoenix0
author_rank: Contributor
timestamp: March 20, 2020, 02:51:13 am
content: So I have a PS4 controller that's not charging the battery or lighting the LED when plugged into power. It's been used hard in a house with smaller kids that don't necessarily take care of things and I'm not sure where to begin diagnostics. It seems that power is making it to the board but it's not coming out of the other side to the battery pins. Anybody ever worked on one before? May be easier to just replace it.

author: ArcticPhoenix0
author_rank: Contributor
timestamp: March 23, 2020, 04:06:00 am
content: Bump

author: tszaboo
author_rank: Super Contributor
timestamp: March 23, 2020, 12:35:25 pm
content: Whats the voltage on the battery? Disconnected.

author: Haenk
author_rank: Super Contributor
timestamp: March 23, 2020, 12:40:11 pm
content: https://www.youtube.com/results?search_query=tronicsfix+ps4+controllerThat guy fixes stuff (mostly consoles) for a living and shows how to do it. Since he usually does a larger batch of the same item, some regular defects become obvious, i.e. those should be checked first.
Please can someone translate this to english? Rewind  armature dc motor diagram - Page 1
Forum section: electronics / repair

author: Bargainhunter
author_rank: Regular Contributor
timestamp: July 31, 2020, 02:35:26 pm
content: Hi,I am trying to rewind the armature on a dc motor for a tape deck. I found this diagram on the web but I can't read it. It's something =7 etc. I think it's arabic.I need to know where to start on the commutator and to what slot to start. I know the coils are wound around four slots. Photo is attached.I appreciate any help.Thank you,Chuck

author: pbarton
author_rank: Frequent Contributor
timestamp: July 31, 2020, 08:35:02 pm
content: Not Arabic, its Bangladesh.

author: amyk
author_rank: Super Contributor
timestamp: August 01, 2020, 02:34:22 am
content: There are some (very old but still relevant) books on archive.org about motor (re)winding, but if you are rewinding an existing armature then just follow the pattern it had from before.That picture you attached doesn't provide a lot of info in any case, and what it does can easily be guessed: 7 segments, 7 coils, skip 2 slots between each coil, 1 coil per segment (simplex lap winding.)

author: coromonadalix
author_rank: Super Contributor
timestamp: August 01, 2020, 12:40:48 pm
content: If you see this video it should be self explanatory ??and some explanations ?http://what-when-how.com/electric-motors/dc-motor-windings-electric-motors/

author: Bargainhunter
author_rank: Regular Contributor
timestamp: August 02, 2020, 05:52:41 pm
content: Thank you for all your help.I just wanted to make sure that I wound this correctly. This is my first attempt and I don't want to do it inncorectly.One final question. It's difficult to determine from the video where the start of the winding is on the commutator. It appears the person wraps the start of the coil one turn around the shaft and then to one of the slots. Is the start of the coil connected to the commutator directly above the start of the coil, in the middle of the coil or at the end of the coil?Thank you,Chuck

author: amyk
author_rank: Super Contributor
timestamp: August 02, 2020, 10:16:13 pm
content: What was the original winding configuration?
Please check my logic on Lolin D1 Mini V4 issue - Page 1
Forum section: electronics / repair

author: Peabody
author_rank: Super Contributor
timestamp: June 03, 2022, 10:26:33 pm
content: There's a guy over on the Arduino forum who has a new Lolin D1 Mini V4 which he bought directly from the Lolin store on Aliexpress. The problem is - when he powers with 5V from USB or from the 5V pin, he gets 5V on the 3.3V pin.https://forum.arduino.cc/t/wemos-d1-mini-high-consumption-in-deep-sleep/977126/20I've given him advice on what he might do to find the cause of the problem, which is to desolder and lift the output pin of the "3.3V" voltage regulator. If he still gets any voltage on the 3.3V pin, then the problem is not the regulator, and there must be a solder blob, or perhaps even a wrongly-placed trace, which feeds 5V to the 3.3V rail. The same would be the case if the voltage on the lifted output pin is now 3.3V - the regulator is fine, but something else is wrong on the board. He would then check for continuity between the 5V and 3.3V pins, and try to locate where the bridge is.But if the lifted output pin measures 5V, then either it has failed short (input to output), or they populated a 5V regulator instead of the correct 3.3V version. From what I can tell, markings don't say what you have. The regulator is the ME6211. To distinguish between these last two situations, I would apply 7V, or a 9V battery, to the 5V pin. If the ouput pin goes up to 7V or 9V, then the regulator has shorted. But if it stays at 5V, then the regulator is good, but they put in the wrong regulator.Does this make sense, or is there a better way to find out what's going on? Does anyone know of a reason why it would be appropriate to apply 5V to an ESP8266? Also, the Mini seems to actually work at 5V. Is that typical? I see nothing in the datsheet suggesting that is permitted. Would this be a chip you would trust in the future having been run at 5V?I have an earlier version, but not a V4. Is there any chance all the V4s are like this? Anybody have one on hand that they could check?

author: thm_w
author_rank: Super Contributor
timestamp: June 03, 2022, 10:59:25 pm
content: A lot of people have run the ESP8266 at 5V without issues:https://hackaday.com/2016/07/28/ask-hackaday-is-the-esp8266-5v-tolerant/Probably gets a bit hotter though.What you suggest makes sense, if they have soldering ability. They could also try probing for shorts with a multimeter.

author: Peabody
author_rank: Super Contributor
timestamp: June 04, 2022, 01:44:42 am
content: Thanks very much. But this is not just hitting the GPIO pins with 5V. This is running the 8266 on 5V on its Vcc pin(s). And the flash chip as well. The entire 3.3V net on the module is at 5V. That's a bit different from "5V tolerant" IO pins.

author: thm_w
author_rank: Super Contributor
timestamp: June 09, 2022, 10:13:14 pm
content: Quote from: Peabody on June 04, 2022, 01:44:42 amRead the comments in the link:Quote
Please explain what does this mean - Page 1
Forum section: electronics / repair

author: abdolah
author_rank: Regular Contributor
timestamp: September 26, 2023, 04:02:00 pm
content: what does "TRIPLE DIFFUSED PLANAR TYPE" mean in transistor?

author: ataradov
author_rank: Super Contributor
timestamp: September 26, 2023, 04:14:48 pm
content: This is just a regular power transistor. The phrase describes how it was manufactured and its type, but it has no bearing on actual use. I don't know why anyone would want to know how it is made as long as it meets the stated characteristics.Most of the transistors you see around (especially standalone ones) are planar, bringing it out at the top is just strange. And triple diffusion is something they needed to do to get the required characteristics. It is sort of meaningless information, more like a marketing thing.

author: TimFox
author_rank: Super Contributor
timestamp: September 26, 2023, 04:16:29 pm
content: Here is a recipe:https://users.encs.concordia.ca/~kabir/ELEC421/421labmanual.pdf

author: abdolah
author_rank: Regular Contributor
timestamp: September 27, 2023, 03:04:46 am
content: Thanks for the replyYou mean that this means nothing on the operation of the transistor. That's weird cause usually the put the important and useful info at the top of the first page

author: abdolah
author_rank: Regular Contributor
timestamp: September 27, 2023, 03:09:52 am
content: And if you can describe what "planner" mean in a transistor please and "standalone"Cause I don't know what does it mean . I only know BJT and mofet

author: ataradov
author_rank: Super Contributor
timestamp: September 27, 2023, 03:44:42 am
content: Planar is a manufacturing method. Read the linked lab document, it describes how planar transistors are made. It just means that it was manufactured on the plane of a silicon wafer. This is opposed to mechanically combining semiconductor materials, like they did when the transistors were first invented.And by standalone, I meant just a singe transistor in the package. With the advanced ICs, manufacturers get creative and making all sorts of 3D structures (FinFET and stuff like this).It is hard to put useful features in the header for a generic transistor. So, marketing got creative and put random stuff there. Happens all the time.
Please help! for repairing of Yokogawa GD402G/M1. - Page 1
Forum section: electronics / repair

author: RaymondRosas
author_rank: Contributor
timestamp: November 22, 2023, 10:19:27 am
content: Hello Everyone to define the model of the LCD screen of YokogawaI'll already check all components using the fados9f1 tester and ESR capacitormeter. I found out all capacitors of the power supply are failing inESR. I changed everything but he is still like that. There is a display,but you still need to use a flashlight on the screen. I suspect that theThe LCD screen needs to be replaced, but I can't find the model of the LCD screen.

author: RaymondRosas
author_rank: Contributor
timestamp: November 23, 2023, 03:16:26 am
content: The lcd does not have backlight, Behind the lcd there are two programmable ic PD7225 lcd, programmable controller,do you think that is the problem.Data Sheet ofPD7225https://pdf1.alldatasheet.com/datasheet-pdf/view/7013/NEC/UPD7225.html

author: jchw4
author_rank: Regular Contributor
timestamp: November 23, 2023, 09:24:29 am
content: Comparingtohttps://www.yokogawa.com/us/solutions/products-and-services/measurement/analyzers/gas-analyzers/gas-density-hydrogen-purity-analyzer/gd402-analyzer/:suggests that most of the display area is free of display segments and should be transparent (i.e. white background visible). Which means that the polarizer film is dead. Please also see the discoloration wround the edges.You can buy polarizing film and replace it. Seefor example. I would not personally recommend the exact method they use in this video. In my experience adding a drop of acetone between the polarizer and the glass helps a lot. Way less stress to the glass. But otherwise the video is correct.It is important that you buy a transflective polarizer. Please also read about different polarizer types on the Web before buying new film and trying to remove the old one.

author: RaymondRosas
author_rank: Contributor
timestamp: November 23, 2023, 02:53:45 pm
content: Thank you so much..sir....
Please Help Boot Eror lecroy Wavejett 334 osciloscope - Page 1
Forum section: electronics / repair

author: Wahyueko
author_rank: Contributor
timestamp: January 31, 2023, 08:30:18 pm
content: Please help, I have a lecroy Wavejett 334 osciloscope, but it's error. When it is turned on, only the words Lecroy appear, then it turns off, the relay clicks, and the beep sounds 3x repeatedly. And the AUTO, STOP/SINGLE lights alternate with beeps.I checked the voltage at the point where the voltage reads the same as what is written on the PCB label,what is the error because when mapping something is missing, because on the front panel the rotary encoder is missing, because I bought it used and there is no rotary encoder.I removed it, there was no value for the rotary encoder, but when I looked at the resistance, when I rotated it, it read 1Mohm.does anyone know how much the value of the rotary encoder is? or does anyone know the link for the sale?

author: Wahyueko
author_rank: Contributor
timestamp: February 01, 2023, 07:25:00 pm
content: now can run but eror on panel

author: Wahyueko
author_rank: Contributor
timestamp: February 18, 2023, 06:27:34 am
content: please help

author: GGMM
author_rank: Frequent Contributor
timestamp: February 18, 2023, 10:30:35 am
content: Hello,on the ney you can find service manual. to help you !!!https://www.opweb.de/english/company/LeCroy/WaveJet-A_Seriescdt
Please help - Executive Audio HA200 damaged SMPS - Page 1
Forum section: electronics / repair

author: stojke
author_rank: Regular Contributor
timestamp: December 04, 2020, 10:42:57 am
content: Device was worked on by someone and had damaged traces and incorrect components in the amplifier. All of that was traced and repaired as it is in the working channel. The Power Source IRFP450 blew and was replaced but also died diodes DZ0501 DZ0500 D0500 and D0501. MOSFET IRFP450 is tied Gate to Source over 30 ohms and an transformer, it relates to diodes in the following way Source goes to D0500 and then to DZ0500 and after that to Gate. (Same goes for the other one). Source ~ D0500 -|>|- . -|<|- DZ0500 ~ Gate .Diodes are MELF type with no markings. DZ are MELF and D are miniMELF.Any idea what are the diode values here?? The fuse blows right away, D0500 and D0501 were shorted and DZ0500 and DZ0501 were infinite resistance.
Please HELP - How to restore Windows on a Rohde & Schwarz FSP spectrum analyzer? - Page 1
Forum section: electronics / repair

author: guarneri0
author_rank: Contributor
timestamp: December 22, 2019, 05:18:36 am
content: Hi,I have an FSP38 (1164.4391.38) that runs Windows XP. However, when I turn it on, it now displays this error message:"Windows could not start because the following file is missing or corrupt:\WINTNT\SYSTEM32\CONFIG\SYSTEM"Can somebody please help me figure out how to fix the OS on the analyzer? Is there a doc on how to restore the OS (perhaps via USB, or LAN or GPIB, or RS232 etc.)Thanks a lot!

author: Psi
author_rank: Super Contributor
timestamp: December 22, 2019, 06:26:19 am
content: Sounds like it can't find the windows registry, which is probably due to disk corruption.First thing i would do is take an image of the entire disk. If it has corruption issues you want to take an image before they get worse.Do you know what sort of disk it uses? CF / IDE etc..This might help for trying to recover from the error.https://www.tek-tips.com/faqs.cfm?fid=5362

author: DaJMasta
author_rank: Super Contributor
timestamp: December 22, 2019, 07:12:09 am
content: Most of the R&S instruments I've worked on have a recovery mode from a bootloader that shows up for just a few seconds after the bios shows. All you have to do is put an input in with a keyboard and you should be able to recover the firmware from an image just like that.If you contact R&S support, they may be able to provide a recovery image as well - I've asked and gotten one for a different instrument before.

author: guarneri0
author_rank: Contributor
timestamp: December 22, 2019, 07:45:41 am
content: The hard disk is a Toshiba 1GB IDE drive (see that in the BIOS.) Thanks for the link - will check it out.Quote from: Psi on December 22, 2019, 06:26:19 am

author: guarneri0
author_rank: Contributor
timestamp: December 22, 2019, 07:51:00 am
content: I tried pressing F8 during the boot time and got the various boot options, including one that said "Analyzer Firmware" - tried this, but then got the same error again.R&S FSP quick start (https://cdn.rohde-schwarz.com/pws/dl_downloads/dl_common_library/dl_manuals/gb_1/f/fsp_1/FSP_KHB_en.pdf) guide says that I should see an "Analyzer Firmware Backup" option, but I don't see that. Only see "Analyzer Firmware" option.Thanks for your suggestion. I have also sent a message to R&S to ask for help.Quote from: DaJMasta on December 22, 2019, 07:12:09 am
Please help ID old capacitor (I think) - Page 1
Forum section: electronics / repair

author: watchmaker
author_rank: Unknown
timestamp: April 30, 2024, 11:55:57 am
content: I think this used to be a capacitor. It is out of a 50 year old machine.In looking up other capacitors for replacement, measurement units seem to have changed from mFD to uFD and I am not sure how to interpret the color code.THANKS!

author: Ian.M
author_rank: Super Contributor
timestamp: April 30, 2024, 12:03:42 pm
content: Mullard 'Tropical Fish' metallised PET or polyester film capacitor.https://www.petervis.com/electronics/capacitor/capacitor-colour-code.html

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: April 30, 2024, 12:04:50 pm
content: Hi watchmaker,100nF 250V (IMHO)

author: wasedadoc
author_rank: Super Contributor
timestamp: April 30, 2024, 12:28:38 pm
content: Brown, black, yellow is 1,0,4 and means 10 followed by 4 zeros pF. 100nF or 0.1uF. (Without a doubt because I used lots of these and other values back in the 1970s.)

author: watchmaker
author_rank: Unknown
timestamp: April 30, 2024, 05:11:09 pm
content: Thank you both. I thought the top color was just part of the body. Ya larned me sumpin!

author: themadhippy
author_rank: Super Contributor
timestamp: April 30, 2024, 05:43:11 pm
content: pity they no longer use the colour code instead of todays minuscule print

author: srb1954
author_rank: Super Contributor
timestamp: May 01, 2024, 10:23:30 am
content: Quote from: watchmaker on April 30, 2024, 05:11:09 pmIt was a common problem for the leads to break away from this type of capacitor when soldering into circuit. The heat from the soldering softens the weak solder used to connect to the capacitor electrodes and, apart from the solder on those electrodes, the only thing holding the leads on is a couple of layers of paint!If you want to replace this capacitor with the same type (for historical accuracy) you need to ensure that absolutely no sideways forces are applied to the leads when soldering.

author: wraper
author_rank: Unknown
timestamp: May 01, 2024, 10:43:21 am
content: Capacitor is likely still operational and measurable. Just stick a probe instead of missing terminal.