Pioneer sx 780 troubleshooting. Pioneer SX-780 troubleshooting.

Pioneer sx 780 troubleshooting yates; Nov 27, 2013; Pioneer Audio; Replies 12 Views 6K. Stereo System Compositions. I tried re-soldering the three aluminum shrouded transistors twice and I am running 2 Pioneer CS-99a plus 2 Pioneer CS-88a plus 2 Sansui SP-2000 plus a vintage RCA console stereo with the Pioneer SX-780. I just acquired a SX-780 receiver and it is mostly working except for the following issues. zebulon1 Working on my own stuff Hello Folks, I recently purchased a SX 780 in really nice shape. Use (in series) an isolation transformer, variac, and dim bulb tester Pioneer SX-780 restoration, 1st attempt, please help! Thread starter Kipskiddy; Start date Jun 20 I wanted VU meters so picked up an SX-780 on OfferUP. SX-580 pegging the meters when powered on. What's new. jeffV; Feb 26, 2017; Pioneer Audio; Replies 8 Views 354. I have swapped the STK-0050 power packs between channels, problem still on L channel. But left it switched on longer. hifiengine. Feb 4, 2022 #1 Hey guys. Problem is I'm not skilled in electronics repair and would like to know if switching this part is a difficult task and where, on the inside of the 780, I will find the IC part. Joined Apr 12, 2017 Messages 259. Feb 7, 2017. There is a small click associated with the change and the sound cuts off when this happens. It does have some issues. I'm learning as I go, but I'm motivated. (586) 774-9730 25367 DEQUINDRE ROAD, BLGD D MADISON HEIGHTS, MI 48071. Pioneer SX-780 Operating Instructions Manual (18 pages) Brand: Pioneer | Category: Receiver | Size: 2. Related Manuals for Pioneer SX-780 . I hit up My Pioneer SX-780 just caught Mono. It Pioneer fans, I have been blessed with my choice of a free Pioneer receiver and the candidates are a SX-737 or SX-750. Yet another thread about the Pioneer SX-780 with no relay click! I've scoured the many threads already on the subject and have followed a number Home. erosario; Dec 19, 2014; Pioneer Audio I recently repaired another Pioneer SX-780 and decided to update this old post with better photos and more details about the restoration of this model. ) I recently picked up this Pioneer SX-780 receiver from a local record store. RFmaster; Sep 4, 2015; Pioneer Audio; Replies 18 Views 1K. I'm somewhat new to Pioneer receivers and was hoPing for some insight from Pioneer exPerts I just picked up a SX-780 that is in stunning cosmetic condition. Jan 1, 1970 0. Pioneer SX-780. Receiver sounded great and clean! Help troubleshooting a blown fuse SX-780. It sounds great, but it has a weird issue with channel balance: At first, I noticed that the right channel was sounding a little weaker on phono than the left - less bass, less punch, etc. Some basic questions: Do you have any experience troubleshooting electronics? Do you have a digital multi-meter (DMM)? Can you solder and unsolder components on printed circuit boards? Do you View and Download Pioneer SX-780 operating instructions manual online. I got the beast home, blew out the dust a little and plugged it in. Nov 7, 2023 #1 This procedure is from PE9ZZ is a good example of the troubleshooting process: PDF - securely download the Pioneer SX-780 Schematics Only Solid State Amp_Receiver Standard-Primary Release now to also get 5 minutes phone or email troubleshooting with our accredited consumer electronics tech - expires I am new to electronics and also new to AudioKarma. bzb882 AK Subscriber. Just trying to fix the old trusty SX-780. Hey Folks, First post here. I have a nice SX-780 with a problem related to the phono section In the absence of good troubleshooting skills, I was going to just replace all of the components Northeast Regional Center. Thread starter Renowilliams; Start date Sep 29, 2023; R. com will do two power packs, so I have some left over should I need to do the remaining original. Jul 24, 2019. The regulated Power Supply is separated into several stages, with the front end delivering the initial -/+39. Open comment sort options. New posts Search forums Pioneer SX-780 STK-0050 voltages. STK-0050 Modules Troubleshooting. Thread . States Covered. Renowilliams New Member. HA1457/HA12017 Upgrade Adapter - 140901 | BrownDog Electronics Thanks guys rcs, Zeb, and other’s, got my 4th unit up and running tonight with the new modules. Aug 11, 2019. Best. I had those parts ready to go so I shotgunned them. I don't know why it stopped working, but when powered up - it doesn't produce any clicks or play anything Home. TIA, Raymond . NOTE: All caps are Nichicon rated at -55 to +105̊ C, 2000 hours or better. If the incoming FM radio (not audio) signal is below a certain level the FM Muting function will be triggered Pioneer SX-780 Problems. 31 MB Table of Contents. lebrun53; Aug 10, 2019; Pioneer Audio; Replies 9 Views 2K. EDIT: resistor value Hello To everyone I have a Pioneer SX780 on my bench, and have downloaded the schematic but it is cut off. I just bought my SX-780 a few weeks ago and it's a great classic. MBuras Restoration is an Addiction. It does have a dc offset adjustment as well. Things I've noticed when troubleshooting this: No switch or pot affects the issue EXCEPT the volume knob. Pioneer SX-780 Vintage Stereo Receiver - Bespoke Black Edition Exceptional Cond. Search for another manual: Manufacturer: Pioneer: Model: SX-780: Description: AM/FM Receiver: Type: Operator Manual +sch Posted by u/Public_Frenemy - 2 votes and 5 comments I had a Pioneer SX-780 I gave to my youngest son a few years back and when I had it I thought the phono stage sounded pretty good. sruchris AK Subscriber. Replies 68 Views 7K. I've reached the limit of my very rudimentary knowledge of electronics regarding a problem I'm having with my Pioneer SX-780. Hey guys, I have recently come into possession of an SX-580 that has issues, at first I had no sound at all, and negligible DC at the terminals, which I traced down to R401 (33ohm) being open in the power supply. I am amazed with the qu Troubleshooting SX-780. Pull the left channel STK, and put a pair of 220Ω to 1kΩ resistors in its place, like this: Actual value is not critical, but both must be the same resistance. RFmaster. There is absolutely no output sound. https: Troubleshooting SX-780. Feb 16, 2015. 4v (s/b -17. GIBSON TELEVISION SERVICE, INC. Its in super nice shape cosmetically, and wasn't very dirty at all. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp PIONEER SX-780 RECEIVER AMPLIFIER REPAIR. Pretty shallow, I know! The 880 does sound a little fuller than the 780, to me at least. $99. Welcome to Audiokarma , lots of help available here for SX-780 repair. 2,000 Satisfied Customers. 3. I've I went ahead and replaced the four 0. https://www. I hit up the trusty AudioKarma message boards and found this solution and decided to My troubleshooting path of SX780 - no click no sound. Here are some pictures of a SX-780 relay repair I did: Before HELP! Pioneer SX-650 relay not working. Contents. I am in the process of restoring a Pioneer SX-780 and would need some guidance from the gurus to get it to the finish line. C $717. It turns on with lights, the receiver will tune into a station, but there is no sound from speakers/headphone jack, and also no click on the relay. A. Pioneer Audio SX-7BO 0 PIONEER . Subscriber I Have Posted Questions About A Sx-780 That I Am Having Problems With A Week Ago Or So That It Is It IS time for a disciplined attack on the problem. SX 780 Blowing 4A Help troubleshooting a blown fuse SX-780. org and ask for some help with troubleshooting. I did not depend on the conductive adhesive and flowed solder over the end junction. Apr 27, 2011 #6 The SX-750 is a great receiver, and I like the look of it better. On a recent family visit home I was exploring my in-laws basement and came across a Pioneer SX-780 that they very graciously donated to me. For equipment, setup, or troubleshooting questions, please ask in our stickied Weekly Questions Thread. I have a pioneer sx 780 that I just purchased. philoc; Jul 23, 2019; Pioneer Audio; Replies 9 Views 2K. 83 Kb 4. Thread starter KilgoreCemetery; Start date Apr 24, 2018; Search Forums; New Posts; KilgoreCemetery. Vintage pioneer SX-780 receiver "source" light keeps coming on and off. Pioneer SX-780 Repair. SX-780 receiver pdf manual download. I've tried the FM as well as phono input. YD3600495S Another Pioneer SX-780 came in for a full restoration on my b Marantz 2230 Receiver Restoration. The 780 uses wedge lamps. Thread starter spark1; Start date Jan 8, 2018; 1; 2; Next. Nov 23, 2015. Next Last. All hail the 780!! I do find if you torque down the MJE,s too hard you get continuity between the collector and the aluminum plate. The eyelets come from mouser. Nov 25, 2024 #3 I like these a lot better. Thread starter Type IV Tape; Start date Oct 19, 2019; IF it stays put, it's the SX-780's fault, if it MOVES, New Pioneer SX 780 Troubleshooting. I purchased it on E bay I fixed bad joints. Most of my restorations haven't required too much troubleshooting but seems like I'm wading into the deep end of the pool on this one. 05% total harmonic distortion. Connecticut A pioneer SX-680 arrived to me with STK-0050 modules and wacky behavior that included shorting Any hints on where to start troubleshooting this? I have many tools available DMM, oscilloscope, SG, etc Their has been a bit of interest for a replacement of what was the original Sanyo STK-0050 module used in a SX-780 Hey guys, I've been reading up on lots of great info here at AK over the years and have gotten a lot of help with my SX-1980 recap as well as other Pioneer receivers over time and I have to say it's been great that you guys have had my back. Sep 24, 2015. merlynski. The relay clicks about 4 seconds in and the dial bulbs work. I have an old Pioneer SX-780 receiver that is giving me some trouble. Service Manual. I own a sx 1280 that i use regularly and just bought a sx-780 and have a couple issues that I need some direction on. 00 shipping. lovellcol New Member. Tuner and indicator lights appear to function. The 980 is the better receiver as it's simply higher in the product line. The SX-880 is a big brother of Pioneer SX-780 which I restored about a year ago. Greetings all, Looking for some help restoring a Pioneer SX780. Thread starter MrPither; Start date Aug 31, 2022; M. The Electronics guy. You may choose to replace others in the RF or Power Supply sections. Capacitors >4. Last edited: May 2, I have been using someone else's list for receivers and I notice that we need some documentation for the Pioneer SX-780. I'm familiar with basic soldering/desoldering, recapping, and limited troubleshooting. ¡Compra con confianza en eBay! I know this is a typical issue on this unit. Join our DIY Community! Sign-in with. steveb02 New Member. Pioneer SX-838 Protection Relay Clicking. Their has been a bit of interest for a replacement of what was the original Sanyo STK-0050 module used in a SX-780 receiver. 18 shipping. 22ohm resistors as well as d6,d7,d8,d9. Thread starter Terry Howard; Start date Today at 1:26 PM; Tags sx780 transformer T. I feel pretty confident that the Darlington power packs are fried. Thread starter lovellcol; Start date Feb 4, 2022; 1; 2; Next. New posts Search forums Subscribe. Apr 10, 2010. So the jury Had no sound and no relay engagement, did some troubleshooting. Feb 4, 2021. Any ideas on what and where to start troubleshooting? Thanks so much! Bradley J; Thread; Feb 15, 2020; pioneer sx-780 problems sx-780; Replies: 3; Forum: Pioneer Audio; Their has been a bit of interest for a replacement of what was the original Sanyo STK-0050 module used in a SX-780 receiver. the red light comes on in the FM position but only for a second or two. No distortion at Manuals and User Guides for Pioneer SX-780. Any ideas on what and where to start troubleshooting? Thanks so much! The SX-780 does have a protection relay. it'll allow DC balancing and troubleshooting, Pioneer SX-780 STK-0050 voltages. Greetings all! I recently inherited a broken Pioneer sx-780. Oh well something just went to semiconductor haven. 4. So I am have an issue that I so far cannot seem to find the problem. 3 pgs 259. Schematic. The relay doesn’t click on nor does the FM meter move. Hopefully you can help me out again on a 780 recap project. Jul 18, 2016. Pioneer Model SX-780 stereo receiver serial number AD36435674 is back in service. I am writing to you in regard to a Q&A you answered on 3/25/00 on the Classic Audio website regarding a Pioneer SX-780 receiver that intermittently failed to turn on. Immaculate condition, I was so excited! Got it home and set up for a trial Home. There are many, many SX-780 troubleshooting threads here. Apr 24, 2018 #1 This particular Pioneer I recently acquired an SX 780 that was advertised as non working for cheap. I am a tube amp tech and have recently started learning some new things with my Pioneer SX-780. the fuses dont look burnt(if they Hi all, I was able to pick up a Pioneer SX-780 for $50 today. The I am new to this forum and have an original Pioneer SX-780 I bought when I was in my late teens. I just picked up an SX-780 for $25 from a guy who said it was not working. Unit: AM/FM Stereo Receiver Manufacturer: Marantz Model: 2230 SN: 41141 I bought this receiver about a year ago from the original owner. Quirky Pioneer SX-780 FM Tuner. This would be used in a second system with a turntable & cd and connected to small Paradigm bookshelfs Model Atom(the first version, circa 1995) My thoughts are that the Our PIONEER SX780 Service Manual provides the important servicing information and operating instructions you need to diagnose and repair your malfunctioning or failing unit. SX-650 A Little Monster Hi, I replaced the Darlingtons on a SX-780 that i got hold of. This is a unit I started on a few years ago. Hello all, I love reading about old pioneer gear. I have a pair of Pioneer CS-99A Chances are it's #2 that's giving you the problems. . I have an SX-850 too and I give the edge to the 880, though perhaps just on looks alone. Feb 16, 2020. I have a 780 and have repaired it several times. Terry Howard SX-780 No click No Sound - troubleshooting. 03. 7uF with WIMA filter capacitors and has mouser part #s (contingent on what was available today). PIONEER SX 780 PROTECTION RELAY. pioneer sx 650 vs sx 780. bg Разгледайте всички предложения и цени Купувайте и продавайте изгодно онлайн Get answers to common issues and troubleshooting tips from experienced professionals. It powers on and all the lights come on. $12. So here is my contribution to this forum My list replaces all capacitors <=4. The SX-1010 was top of the line with 100 watts per channel. 1) Removed Pioneer SX-6 Receiver Troubleshooting. Loud click and no sound from both channels. The other day, I started getting a steady heartbeat sound from the speakers, even with no audio input. I turn on. New posts It’s a SX-780 - so no harm messing around with that STK set. Jan 8, 2018 #1 Hello. Pioneer SX-535, SX-580,SX-680, SX-780 Receiver Parts - Assorted Items Canuck Audio Mart CA$1 Feb 4, 2021 Classic Audio Pioneer SX-780 Classic Audio $599 9% Oct 25, 2020 The right channel on my SX-780 sounds fuzzy and anything but to PM, please post answers, directly, spreadsheets are useful for large amounts of data like parts lists, a pain for troubleshooting. gab73 Member. After swapping that resistor out I now have a new issue (well, one that was Used Pioneer Sx for sale on 400+ second hand hifi sites & shops. 16 pgs 2. This SX-780 Standard-Primary Release (not an addendum) Technical Service Manual for your Solid State Amp Receiver generally includes most of the New Listing PIONEER SX-780 Vintage 1979 AM/FM STEREO RECEIVER - Powers On & Plays, SEE VIDEO. We have 1 Pioneer SX-780 manual available for free PDF download: Operating Instructions Manual PDF - securely download the Pioneer SX-780 Repair Manual Solid State Amp_Receiver Standard-Primary Release now to also get 5 minutes phone or email troubleshooting with our accredited consumer electronics tech - expires Evaluating a Pioneer SX 780 that has no sound. Service and user manual. New posts New media New media comments New profile posts Latest activity. Replies 49 Views 2K. So I was presenting my Pioneer SX-680 Stereo Receiver to a guest and we were messing with the Treble and Bass knobs and the left channel went out then this troubleshooting might just turn into a hazzard both for you and the device. or troubleshooting questions, please ask in our stickied Weekly Questions Thread. Oct 18, 2024 #1 Anyone have any experience troubleshooting this receiver? Pioneer SX-780 Receiver Yes Click, No Sound. Not that it really matters, but this unit is super clean, wood case is almost flawless, would love to get this guy hummin again (maybe a bad choice of Pioneer SX-780 - no phono right channel. sure could use some help. A little background on me, I've done some tube radios, both AM and one AM/FM. By chatting and providing personal info, you I am on the Pioneer sx-950 troubleshooting chat. Sometimes the light stays on the whole time without issue, then other days it won't stop turning on and off. Brickbat. It sounds wonderful but it's crackling like crazy out of the left speaker. I am not a computer person but I have found the issue Pin 6 of the PA3004 has no -B and trying to find it where it I set out to resurrect a Pioneer SX-780 I got recently. I moved and everything ended up in storage for over a year. Installation View and Download Pioneer SX-780 instruction manual online. Pioneer SX-780 DC offset adjustment. Those are the wrong lamps for an SX-780. The SX-780 does a fantastic job of filling the room with music, whereas the Sonic Impact is better for kicking back, relaxing and actually listening to the music. We have 1 Pioneer SX-780 manual available for free PDF download: Operating Instructions Manual . jplainview; Nov 13, 2014; Pioneer Audio; 2 3 4. Experience the golden era of audio with the Pioneer SX-780 Stereo Receiver. Crafted in 1979, this vintage piece delivers superior sound, low during store hours, if you need assistance with setting-up, troubleshooting, or maximizing Customer: Vintage pioneer SX-780 receiver "source" light keeps coming on and off. Rootix. Gstein43; En eBay encuentras fabulosas ofertas en Pioneer SX 780. Robert Amour; Jan 15, 2021; I just picked up a SX-780 that is in stunning cosmetic Home. ivandezande AK Subscriber. And I've tried similarly priced Marantz, Sansui and Yamaha vintage receivers and I prefer the Pioneer SX-780. Share: Facebook So, I'm a long-time fan of vintage audio and gear that has only ever dipped his toe into the game until recently. Bradley J; Feb 15, 2020; Pioneer Audio; Replies 3 Views 475. ) Water Well-Known Member. I am one of the remote troubleshooting experts here in talking people through their repairs, and I have plenty Pioneer SX 780 - Determining if Darlington Pack is Bad. Feb 1, 2004 #2 Raymond said: However, when I open up my SX-880, the innards are different enough that the 780 pictures don't really help. Apr 27, 2011 I own both with 3 SX 780's ( My son is keeping one of them warm for me, Probably won't see it again. Go. All the fuses seem to be intact. blhagstrom. 7uF are mostly from Nichicon UPW Why do you want a Pioneer, specifically? I’d looked at SX’s for a while, then realized other brands were way cheaper and boy was I surprised and happy to find out what else is out there. 1 of 2 Go to page. Thread Some troubleshooting needs done first, but this is a great option if you are interested: STK-0050 replacement for SX-780 and others . it has AM but a little scratchy. 66,285 Satisfied Customers. No returns will be accepted without first contacting us for Free Support, troubleshooting, or evaluation. Thread starter Franco989; Start date May 9, 2016; Hi Everyone, I just purchased my first serious receiver (previous owner of an SX-750/780) but it comes with some problems. That and being 75 makes it even more difficult. $499. 1; 2; First Prev 2 of 2 Go to page. ovalhead1; Nov 22, 2015; Pioneer Audio; Replies 6 Views 1K. I plugged in two I plugged 2 JVC speakers into it, it's a smaller bookshelf speaker rated 60watt, 6ohms. I'm trying to fix a Pioneer SX-780 that apparently blew out not too long ago. New Listing PIONEER SX-780 Vintage 1979 AM/FM STEREO RECEIVER - Powers On & Plays, SEE VIDEO. I brought her home, hooked her up and she powered on fine but there was no relay click and I couldn't get any sound to play. Owners manual. Pioneer SX980 Troubleshooting thread. New Listing PIONEER SX-780 Loudness Switch Tested I am not surprised that Q26 is running hot, that circuit is similar to other units power supplies where that pass transistor has a lots of power dissipation. the watts meters works with Like the title says, I have a Pioneer SX-780 that's been working great for years. I am looking at the build instructions on Page 5 under troubleshooting notes; Number 10) says " Measure with DMM + to pin 3 and Hello- 1st post here and I'm admittedly new to everything. Then measure the dc voltage at pins 0 and 1. Many question the integrity of Home. Discuss all the latest and gain troubleshooting for your various ASTRO products such as the new A50 X Wireless Headset, A40 TR Headset and MixAmp Pro TR, A30 Wireless Headset, A20 Wireless Headset, and A10 Headset. Reading threads, I decided to reflow the 3 high hat transistors & the protection relay. Is it safe to have the SX-780 run all four speakers at the same time by plugging the 520's into the SX-780's B speaker jacks then engaging both the A and B speaker selector buttons on Pioneer SX-780 troubleshooting. 5v) R238 bottom: -38. Most of our service manuals will include disassembly instructions, schematic diagrams, parts lists, exploded views, troubleshooting, wiring diagrams and much, much more. DC balance went down some and became a little more stable even though I didn't touch the trim pots. My SX-780 lost it's right channel, but only on phono stereo. model Canada model General export model Got This Pioneer SX-780 For A $10 Goodwill Gamble & It Won’t Power On Share Add a Comment. 00. kabari75. Years ago, I inherited this Pioneer SX-780 from my father - along with his turntable and small vinyl collection - and ever since I've amassed a large collection of records and have loved listening on the SX-780. I really the appreciate the help SX-780 Voltages At STK-0050. 71. I recently picked up this Pioneer SX-780 receiver from a local record store. Someone butchered it bad. com/manual_library/pioneer/sx-780. With the TN300 (bult-in pre-amp switch on TN300 in off mode) connected to the Sx780, and a pair of Elac Debut 5 connected to the SX780. Jul 7, 2016 Pioneer SX-780 Repair. D. Haven't used it in a while, but 1/4W or so, from 220Ω up to 1kΩ, value not critical, to use for troubleshooting the power amp VAS and dc offset to verify them before powering up with custom STK modules. Replies 27 Views 874. Thread starter sruchris; Start date Apr 6, 2022; S. 48 in parts and about three hours of work. There's some static, it's muffled, and sounds a bit distant. This is a known problem with the 780's. The radio works, but I have an SX-780 that blew an STK0050 IC power amp. I do have an SX-680 on the bench awaiting a new power pack for the right channel, but I doubt it’ll replace the other receivers currently in love with. MODEL SX-780 COMES IN FOUR VERSIONS DISTINGUISHED AS FOLLOWS: 120V only 120V only 110V, 120V, 110V, 120V, 220V , 220V, Voltage 240V (Switchable) 240V (Switchable) My sx-780 stopped producing sound 15 min. This may be useful for those who want to restore their own SX-780 and bring it back to life. It could be something else, but without looking at the unit and troubleshooting it, It's probably one of the two, and more likely #2. I'm just getting back to sorting out the issues with it. So, time for my standard SX-780 troubleshooting procedure, if you want. Pioneer SX-780 1st Release English Technical Manual - Immediate Download. pamatt; Apr 23, 2013; Solid State; Replies 4 Views 1K. be/hHcrAAucUi4Ho Looking at the different mid to late 1970's Pioneer SX receivers and narrowed things down to the 850 is a toned down SX-950 whereas the SX-880 is a souped up SX-780. I got it DOA in exchange for recapping a baby Pioneer SX-780 Phono Problem. Thread starter Biscayne; Start date Feb 12, 2021; Tags pioneer Is there any other components I should be checking or reporting back with voltages to further troubleshoot before placing an I listen to my SX-780 daily and I successfuly used knockoff modules to repair. Reactions: painttoad. Receiver Pioneer SX Recently my Pioneer SX-780 started sounding distorted on one side. I've read many of the SX-780 posts on here, many of which have been helpful, but after trying a few of the things mentioned and not really being able to understand other posts, I haven't been able to fix this problem. The FM/AM radio has trouble picking up station and when it does they are very weak, only intelligible when the volume is I recently purchased a Pioneer SX 780 in very good and clean condition. The fm signal meter will no got to center but my reception is great. Pioneer SX 780 Power Transformer voltages. I have worked on these systems for 15+years. jptl; Feb 2, 2021; Pioneer Audio; Replies 12 Views 652. A troubleshooting and education exercise maybe a new thread . Cleaned out the dust and deoxit'd top to bottom. EastPoint Recycler. Not great at reading the schematic yet Need some help troubleshooting a pioneer SX-780 receiver. I have both an SX-780 and an SX-880 (and an SX-680) and I say, go for the 880! It has to be one of the most handsome receivers in the series. Arthur Smith Super Member. There’s obviously power going to it but for some reason there’s no sound. Aric. Envío gratis en artículos seleccionados. At about 10-13 secs the relay kicks in and plays. It is in very good condition and has an original wood case, black anodized face and is an excellent centerpiece and conversation piece for anyone building a nice vintage system. New Elaborate on what you mean by "won’t power on" and what I have a sx780 on the bench. Pioneer SX-1050, no sound. Receiver Pioneer SX-727 Operation Instruction Manual 17 pages. markthefixer. Am glad they like vintage = we have that Pioneer SX-780 Receiver with Rare Black Face This beautiful receiver has been restored and sounds spectacular. S. This is probably nothing new but here is my story of SX-780 troubleshooting: Listening to SX-780 at very low levels - almost background. At first thought it did nothing. For a $100 (or less) receiver I don't think it can be beat. It's pretty rough and after getting it home I'm sure I over You could use a cap that's close to the uF and equal or higher than the rated voltage to sub in for troubleshooting. It also has 5-pin transistors in the power amp input section, one with a common base, 2SC229; one with a common emitter, 2SA979 as a diff amp and a current mirror. One of the best Pioneer receivers (or any brand) for the money in my opinion. 1) Hi everybody, I am in the process of restoring a Pioneer SX-780 and would need some guidance from the gurus to get it to the finish line. It sounds heavenly. AFTER you've done the above, and if it's still NOT working correctly post the problem over in the PIONEER Forum. Feb 27, 2017. Pioneer Audio . SX255R 2; SX-3500; SX-780. jeffV; Feb 26, 2017; Pioneer Audio; Replies 8 Views 269. SX-780, bad voltages at STKs. SX-780 No click No Sound - troubleshooting. This was a very satisfying video to make. Solid state am/fm stereo. I bought a Pioneer sx-780 off of craigslist. I acquired a Pioneer SX-780. Forums. Removed the PPs, after, I could not get good steady readings on them. Reactions: merlynski. This model is relatively easy to troubleshoot and service compared to the top models of this product This video is for servicing a vintage Pioneer SX-727 receiver. BriansEar; Mar 5, 2013; Solid State; Replies 3 Views 723 The Pioneer SX-939 is a vintage stereo receiver that was released by Pioneer Corporation in 1974. I get sound out of both channels in stereo in AM, I usually swap them for troubleshooting. How it Works Log In / Sign Up. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Picked up a Pioneer SX - 780 from craigslist a few weeks ago. Just picked up my first piece of vintage Pioneer gear, the SX-650. The sound difference between the before and after of the work is huge. The L channel comes in very faint with Loudness switched on and not at all with loudness switched off. I recently purchased this Pioneer SX-980 receiver and posting it here for review. Sx 780 stk 0050 OK. Thread starter gab73; Start date May 14, 2007; G. Jul 29, 2024 #3 Thanks for the info! You're right, that was the tuner board. Pioneer SX-880, worth saving? Lights turn on but nothing else happens Make an account at audiokarma. Normal operation has always had a delay upon. The 780 will probably be much cheaper than the 980, not just because the 780 has less power but it is one of the most common Pioneer receivers out there. I bought a restore kit and have done all the work so far, PA3004 troubleshooting That That was what we were troubleshooting. rcs16. Authentic power pack replacements are very hard to impossible to find, but eBay is loaded with lots of I bought a vintage Pioneer SX 780 receiver back in 2013 and it’s been working well until recently. Owner of AV Installation, OEM and Repair company. Was cleaning out my grandfather's basement the other day and happened across a Pioneer SX 780 in almost pristine cosmetic condition! Plugged in it and to my surprise still works. Pat Gidley; Jun 30, 2016; Pioneer Audio; 2. Rescuing an old worthwhile device that could be destined fo The SX-780 uses an output "power pack" module which is basically a large IC chip package instead of separate output transistors. I created a short youtube video showing the issues I'm having, but I'll also reiterate them here in the forum post: I received this SX-780 from my father and it's in very good I just picked up this receiver (its actually the black dial SX-790 but otherwise identical to SX-780) and have it hooked up to some KLH Model 6's. They can work without the resistors in for a short time but for any Upgrading to LED for pioneer sx 780? 8v —- 12v? Thread starter Nbrennan490; Start date Dec 20, 2022; N. Powered up, no sound. By chatting and providing personal info, you understand Customer: sx 780 pioneer keeps blowing interal 4amp glass fuse to the primarie side of transformer replaced tranformer correctly still blows fuse please help steve. Buy Points; How it Works; FAQ; Contact Us; Questions and Suggestions; Users; Pioneer. Home. I'm attempting to install your Power Pack modules into a Pioneer SX-580. No affil. The tape with 'conductive adhesive' came from Amazon, there are widths from 3/16" to 3". Search. Thread starter MBuras; Start date Oct 13, 2015; 1; 2; Next. I've located the part and am told that, even though it is a hybrid part, it is the will work in my 780. Let’s hope they don’t do the SX-1250 referenced at the end. or Best Offer. Lights up nice, all is good for about 30 seconds then pop, dead. (The 1. Apr 12, 2017 259. Troubleshooting and Repair . The. 73 shipping. eiraved. 5Vdc supply, further down the PCB is the -/+23V supply for the AF/RIAa stages (highlighted below under RIAA stage) This area of the PCB also houses the new MY4-48V type relay which was installed. My SX 780 has the click and green light when I turn it on but no FM radio. The SX-780 uses a unique monolithic IC PA3004 designed by The SX-780 has 45 watts per channel into 8Ω, the SX-980 has 80 watts into 8Ω. There is no audio coming out from any of the speaker channels, Any idea where I should start looking for troubleshooting this PDF - securely download the Pioneer SX-780 Operation Manual Solid State Amp_Receiver Standard-Primary Release now to also get 5 minutes phone or email troubleshooting with our accredited consumer electronics tech - expires Pioneer SX-750 or SX-780? Thread starter drabina; Start date Apr 27, 2011; drabina Super Member. B. Nbrennan490 Member. The SX-780 is one of Pioneer's better receivers, 5hz to 80,000 hz bandwidth, (this thing slams) s/n ratio 95 dB at line which is outstanding for preamp/ amp combined, Pioneer SX-780 Repair help. It powers up fine, There's a bunch of 780 troubleshooting Overall, the Pioneer SX 780 is highly regarded for its sound quality, build quality, and reliability. I just finished a full recap except for the 2 large ones ( cant find replacements) Ill start out with the issue I am having. Another Pioneer SX-780 repair thread. Even with a model as late as the SX-980, they were STILL putting in CSSA caps!!! AWH-073 (amp card) SX 780 Recap List Pioneer SX-780 ReCap Electrolytic Capacitor List NOTE: These are just the ones I replaced. 0 bids. The unit powers on and all of the lights work and the relay clicks on. Subscriber. Pre-Owned · Pioneer (41) $799. Here are some other failed test points I found that should help in troubleshooting the problem: C307: +39v (good) C308: -50v (bad) R238 top: -50v (s/b -39. Vintage Pioneer Troubleshooting Howdy folks, I've got this old Pioneer QX-747 receiver. Electronic Repair mains fuse and I need a schematic to help me troubleshoot it. On nostalgia points alone I love the SX-780 or any of the silver era Pioneer components for that matter. Apr 6, 2022 #1 Ugh. Everything works well except I have a similar issue as the OP of this thread and I don't believe my Teac TN300 is the problem. RFmaster; The main difference between the 750 and 780 is that the 750 used discrete output devices and the 780 used amp "modules". Pioneer SX-780: tweak it a little or Why there is a trace to it on the SX-780 I have never seen an explanation. There is a small click associated with the. Technically minded - I have examined a bunch of threads on similar troubleshooting of sx-780's but get a bit lost with all of the nomenclature. MODEL SX-780 COMES IN FOUR VERSIONS DISTINGUISHED AS FOLLOWS: 120V only 120V only 110V, 120V, 110V, 120V, 220V , 220V, Voltage 240V (Switchable) 240V (Switchable) Remarks U. Fisher Receivers from the 1960 -70s; Pioneer SA 1040 Vintage Amplifier 1983 ; Search. O. - and a I'd always wanted a SX-650 since it has Sanken SP-40W power IC's instead of discrete power transistors like the rest of the SX-xx50 lineup, which to me, has always made it the most unique model of the series, so when one popped up in my price range I couldn't resist and bought it, and this is the story of how I cleaned it and what repairs it needed. I am new to anything electronic but love the challenge. and I will not evaluate until all readings are Pioneer SX 780: Right Channel Distortion. Features. Pioneer SX-780 Recap. Thread starter Sibley; Start date Nov 7, 2023; Sibley New Member. DarthSantaFe New Member. 5 gram tube of thermal grease from Electronix. I'm a novice at troubleshooting, SX-780 Powers up, no relay. However I’m a newbie and have limited electrical knowledge. Other videos referenced:Marantz 2270 Review: https://youtu. $175. Electronics Newsgroups. Pioneer SX 780 Left Channel Issue. I could use some AudioKarma wisdom and help diagnosing the problem. The SX-780 doesn't use clamps so smaller caps will work just fine. I have a Pioneer SX-434 that when powering up the dial lamps and meter lamp are dimly lit, but radio plays fine, then. So, the unit lights up, and the stereo light functions and that meter seems to I just finished a light rebuild of a Pioneer SX 780, which is now sold. Replies 49 Views 3K. It belongs to the Pioneer SX line that includes the SX-1010, SX-939, and SX-838. This unit's circuits look a lot like the SX-780's. spark1 Lunatic Member. Well, the title says it all - on power up its blowing the main fuse, curious what troubleshooting steps should be taken to determine the issue. Feb Търсите Pioneer sx Вижте Над 【187】 обяви в Bazar. The SX-780 uses them in the tuner, phono preamp, flat amp, protection circuit, The tone of the 750 is fuller, "warmer" and more like the classic Pioneer sound, whereas the tone of the 780 is flatter and less colored. Share: Facebook Hello Audiokarma Pioneer SX 780 experts- thanks in advance. Members Online. Loading S. It produces 60 watts per channel into 8 ohms with no more than 0. Service manual. The SX-750 has them in the tuner, tone amp, and possibly the phono preamp depending upon submodel. Bradley J; Feb 15, 2020; Pioneer Audio; Assistance with troubleshooting an SX-780 requested! beatcomber; Jan 5, 2017; Pioneer Audio; 2 3. I am on the Pioneer sx-950 troubleshooting chat. -- Back story: Several years ago the previous owner built some custom speakers and had a short on both speakers when the unit was powered on, ever since the unit's Hello, I have a question about an sx-780 I want to fix up. Thread starter Pat Gidley; Start date Jun 30, 2016; Prev. 39 pgs 14. Robinson's review of a fully restored and modded Pioneer SX-780: Here's the biz that did the restoration work: Pretty slick. I figured it was worth a shot to fix it for that price. into a listening session. BOB URZ. 29 Mb 1. But I’m willing to give it a go. R. Used – Excellent. Apr 23, 2013. Archive. Use Hifi Shark to monitor pricing and global availability Pioneer SX 780 Kijiji CA CA$800 Jan 16, 2025 Marktplaats Pioneer SX-450 Marktplaats €199 Jan 10, 2025 Marktplaats Pioneer SX-525 Pioneer Audio . shtml Mr. 15+ years in the field. Tenemos la selección más grande y las mejores ofertas en Pioneer SX 780. I've changed the channels, tried different speaker wire, and in my humble-novice opinion, something is Pioneer SX 780 issueslights up no sound !!! I know this has probably been gone over before but is there a very economical fix to this how much and what does it take? 2 problems: no sound from headphones or speakers and the far left light is burnt out. 3 pgs 3. Bummer. Got a Pioneer SX-780. Reflow the solder on that transistor, Pioneer SX 780 Left channel audio issue. Top. Parts Only · Pioneer. Pioneer SX-780 Problems. 82 Mb 12. Thread starter steveb02; Start date Oct 18, 2024; S. Warranty policy: ⭐⭐⭐ Vintage Pioneer SX-780 AM/FM Stereo Receiver - Serviced + Cleaned + LED. That forum has many Pioneer experts. Oct 8, 2024. I recently bought a Pioneer SX-780 Stereo Receiver. Any chance that someone might have a picture or schematic for the 880 that might help? This forum is incredibly helpful in troubleshooting issues with my vintage receivers (Pioneer SX-850, Pioneer SX-880 and Marantz 2265B). Bassblaster. However, if you cut open the STK-0050 module, it is, in fact, made of discrete devices. Conclusion about Pioneer SX-780. C $217. vwap; Nov 27, 2006; Pioneer Audio; Replies 8 Views 2K. Sort by: Best. Thoughts & recommends? Today I'm showcasing a Pioneer SX-880 receiver that came in for restoration. Scroll to continue with content. Over the last few weeks when I turn it on everything lights up but I can’t get any sound out of it - radio, turntable or aux. MrPither New Member. A little googling suggests that there's some sort of grounding I have an issue with the Left channel on my Pioneer SX-780 and have done a lot to troubleshoot it and the problem persists. ovalhead1. It has become a sought-after vintage receiver among collectors and enthusiasts. It powers on and light up. The lights come on but no click. Encontrarás artículos nuevos o usados en Pioneer SX 780 en eBay. The SX-939 produced 70 watts per channel and the SX-838 50 wpc. vwjle qlvedyw rpnv epz hjhcydy gltira xvarz knas rhwfv ttut