Pioneer Sx 780 No Sound

Pioneer SX-780 ; Pioneer SX-820 ;. ) Contact 768-0119. I think it largely depends on the speakers you are wanting to drive and the size of the room. Is this an easy fix? Its got no fuse, and says that I have no business being on the inside of this thing right on the back, so what do I do? Thanks. I recently picked up this Pioneer SX-780 receiver from a local record store. Here for sale is a fully restored and refurbished Pioneer SX-450 receiver. ? There are six possible causes. PIONEER SX-790 STEREO RECEIVER, VERY RARE BLACK VERSION. Found 200 records in Search of Vintage Asylum. (this unit has a bunch of fuses on a board, but I think this is the biggest one?) I replaced it and turned it on, and the fuse blew. Your query returned too many. Taxes are charged in the following regions either by the seller, per their tax. Carver Receiver 2000 (good sound, but not the Pioneer). Pioneer SX-780 no sound What is meant by 'does the relay pull in'. I heard this very powerful and clean sound pour out my speakers. I have a pioneer sx-950 with no sound output. The reliability, and sound quality post restoration is remarkable; honestly, you won't believe what you have been missing. eg the sx-1250 and the sx-1280, or the sx-750 and sx-780. On nostalgia points alone I love the SX-780 or any of the silver era Pioneer components for that matter. We are proud to offer repair parts and service for Vintage HiFi Audio. Produced in 1974 it churns out 35 watts per channel. please help me finding the manual. Hello--I've got a "vintage" Pioneer SX-780 stereo receiver that has bitten the dust. It had bad sound when tuned to FM stations and barely had any sound when using the record player with it. Brands / models of Classic / Vintage Stereo Receivers, 'Old-School' / 2-Channel stereo receivers, and Quadraphonic / Quad AM/FM receivers (sometimes referred to as "Radios" and / or "Tuners") such as Kenwood KR, MCS, Pioneer SX / Pioneer SX-1980 for sale, Sansui G, Sony STR, Yamaha CR and Stereo / home audio receivers from the 1960's, 1970's. Upgrade Kits and Parts ship FREE via USPS standard mail to US, International customers will incur a shipping fee, if you don't see shipping to your country please ask. We service and repair all Pioneer receivers and especially these ones. A NOTE FOR PCB Pioneer operating instructions audio multi-channel receiver sx-316-s (30 pages). It was manufactured from 1978 to 1980. 1% to a tiny 0. One thing I do think is that the ones ending with 80 are the same as the ones ending in 50, except the 80's have watts meters in addition to the tuning meters. I walked the entire sale and never noticed the reciever on a card table in the middle of the garage. can you recommend a service center here in Omaha ne 68144 to have the receiver repaired. Posted by tbcblues on April 15, 2003 at 11:15:24. The person submitting the question reported that the protection relay was failing to kick in and turn on the outputs. Pioneer SX-780 relay pin out Amp powers up, but no output to speaker terminals and headphone jack. Does anybody have the schematics or service manual for the Pionee SX-780 receiver. Find many great new & used options and get the best deals for Vintage Pioneer SX-780 Stereo Receiver at the best online prices at eBay! Free shipping for many products!. Not the best audio quality in this video but the subtle differences stand out. 780 'keep connecting cords as Short possible. I didn't quite know which receiver would sound better with the tt so I tried them both. Pioneer vintage stereo repair USA. 3% total harmonic distortion. Sometimes the light stays on the whole time without issue, then other days it won't stop turning on and off. I Bought A Pioneer Sx-780 Of Ebay It Was Discribed In Good Condition But With No Sound I Got It Today And Pluged It In, Sure Enough It Has No Sound, I Checked The Fuses And They Look Good, I Tried A And B Speakers Still No Sound. Stored and decided to sell it. If you see this ad it is still available. 1988 Elite Series Brochure 14 Mb. Pioneer SX-780 Stereo Receiver How to Troubleshoot and Fix LED LCD TV Vizio and Sharp flatscreen No Picture but sound Adventures in Vintage AudioThe Pioneer SX-780 Stereo Amplifier. We specialize in Vintage Marantz, Pioneer, and Sansui. 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. Back in the late 70's I purchased a Pioneer SX-980, had it for several months and sold it when the SX-1980 was on clearance as a discontinued model. The service manual functions as a repair guide for troubleshooting and sometimes contains tips for refurbishing and. vintageaudio) submitted 1 year ago by pl570man Whats up reddit,. Pioneer SX 850 Receivers user reviews : 5 out of 5 - 16 reviews - audioreview. I have an SX-780 that I believe is wired parallel though I am not totally sure. The fm signal meter will no got to center but my reception is great. View and Download Pioneer Sx-218-k operating instructions online. John I own a pioneer stereo receiver model sx1080. It was the last of Pioneer's 700 series receivers and was very well built. The internals were high quality with. micrfiche in or Best offer + $3. It's really very nice and has only the most superficial scuffs. Avoid magnetic fields, SX. Below you will found our manuals on the Pioneer SX-780. Here is another late 1970’s classic receiver. Craigslist Search, Craigslist is no longer supported. Larry (December 22, 2009): The 790 and 790w4 are Black dial face versions of the 780. Find many great new & used options and get the best deals for Pioneer SX-780 Vintage AM/FM Stereo Receiver at the best online prices at eBay! Free shipping for many products!. Condition is For parts or not working. The receiver considering it's age produces an outstanding crisp stereo image with clear Hi,Mid and Low frequencies. Duration : 2. Pioneer SX-780 AM/FM Stereo Receiver add a review (15 reviews) Pioneer SX-780 Description The SX-780 features a high output, low distortion power amplifier, a high fidelity equaliser amplifier with low noise and high gain, a high stability tuner section, tone controls with tone defeat function, built in protection circuits and independent power. I wanted to opt for a receiver with a built-in pre amp and came across a Pioneer SX-780 in good condition on Craigslist for 125. Pioneer SX-780 (most popular receiver of all time) Jul 20, 2019- Pioneer SX-780 (most popular receiver of all time) Discover ideas about Pioneer Audio. SX-780 S 3 Mb. The service manual functions as a repair guide for troubleshooting and sometimes contains tips for refurbishing and. I walked the entire sale and never noticed the reciever on a card table in the middle of the garage. Solid State Receiver Pioneer SX-316-S Operating Instructions Manual. The receiver turns on but no sound comes out of the speakers. Pioneer SX-780 Repair Tube. Does anybody have the schematics or service manual for the Pionee SX-780 receiver. Reply to Thread. Ad Description. https://www. The was a development case. I thought a nice SS unit for my friends to use as a comparision would be a nice toy to have. 1% to a tiny 0. I have one of those cool pioneer receivers from the 70's and its in great shape. PIONEER SX680, 980 gałka pokrętło balansu, PL. Reply to Thread. Download Pioneer SX-780 Much smaller version than other. they use the same owners and service manual. Why can't I get sound from my receiver? If you are not getting any sound from the receiver, check the following: 1. Pioneer SX-680 SX680 Audio AMP Amplifier Receiver Radio Test. Pioneer Sx-316 Manual View and Download Pioneer SX-727 operation instruction manual online. https://www. I Bought A Pioneer Sx-780 Of Ebay It Was Discribed In Good Condition But With No Sound I Got It Today And Pluged It In, Sure Enough It Has No Sound, I Checked The Fuses And They Look Good, I Tried A And B Speakers Still No Sound. You can scroll through the list to find the brand you are interested in and then read the titles for specific information on the model etc. 1: Re: pioneer receivers (15. Welcome to USAudioMart, a classifieds site for used audio and hifi. He also put a heat sink on the the transistor to bring down the temp. Followers 0. Found 200 records in Search of Vintage Asylum. It had bad sound when tuned to FM stations and barely had any sound when using the record player with it. On one of the websites, I saw that it was written PAC0101A=STK411-230E. They were the uncompromising top sellers in the international market receiver that you could buy in the HiFi-Studios. "Silver Era" Pioneer SX-780 Receiver Specifications Continuous Power Output: 45 watts per channel (8 ohms from 20Hz-20kHz with no more than 0. 1: Re: pioneer receivers (15. Most Pioneer model names can have the addition -S or -K. com Today were showcasing a customer Pioneer SX-780 Receiver. AM works fine too. If it ends up being a blown amp, and a Pioneer SX-780, it's worth repairing. it is pioneer SX-316. If you don't need those options, you can save yourself about. com/manual_library/pioneer/sx-780. Find many great new & used options and get the best deals for Vintage Pioneer SX-780 Stereo Receiver at the best online prices at eBay! Free shipping for many products!. Blew a fuse one day and no channel produces sound please help!? I have realized that the power goes through the board till it hits a resistor coated brown, grey, red, gold. Square buttons are sleek and small. Thanks or all your help so far. I was real impressed with the sound of the Unit. please help me finding the manual. Site Notices 2nd Amendment Rally - Fight or Lose Your Rights! Vintage pioneer rt-909 real/ pioneer sx-780 for. Find many great new & used options and get the best deals for Pioneer SX-780 Stereo Receiver - Very Clean Fully Restored, New Real Walnut Case at the best online prices at eBay!. Some minor issues to fix yet, but it sounds pretty good. The owners manual is used as an reference guide, instruction manual and instruction book. Very nice sound. There is 1 cherry case available. If your listening room is of average size, chances are that the Pioneer SX-650 will be just right. I should really be more of one, as I’ve made quite some great scores at them, as well as estate sales. I Bought A Pioneer Sx-780 Of Ebay It Was Discribed In Good Condition But With No Sound I Got It Today And Pluged It In, Sure Enough It Has No Sound, I Checked The Fuses And They Look Good, I Tried A And B Speakers Still No Sound. PIONEER SX-790 STEREO RECEIVER, VERY RARE BLACK VERSION. everything worked great. pioneer SX-780 stereo receiver. Must give name and number for a response and ask for an appointment to pickup. 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. I have my original SX-780 and C-77 speakers from the '70s. Followers 0. 3% total harmonic distortion. We specialize in Vintage Marantz, Pioneer, and Sansui. Brands / models of Classic / Vintage Stereo Receivers, 'Old-School' / 2-Channel stereo receivers, and Quadraphonic / Quad AM/FM receivers (sometimes referred to as "Radios" and / or "Tuners") such as Kenwood KR, MCS, Pioneer SX / Pioneer SX-1980 for sale, Sansui G, Sony STR, Yamaha CR and Stereo / home audio receivers from the 1960's, 1970's. Produced in 1974 it churns out 35 watts per channel. Rear and side s (Placing with rear against a improves bawl s that vibrations. It’s the Pioneer SX-980 and was produced from 1978 to 1979 and was the last of the 900 series receivers from Pioneer. PIONEER Tapa deck sure to instan when us. Search of Vintage Asylum I use my Pioneer SX-780. Find many great new & used options and get the best deals for Vintage Pioneer SX-780 Stereo Receiver at the best online prices at eBay! Free shipping for many products!. Find Pioneer Receivers Sx in Canada | Visit Kijiji Classifieds to buy, sell, or trade almost anything! New and used items, cars, real estate, jobs, services, vacation rentals and more virtually anywhere in Ontario. Pioneer SX-780 Stereo Receiver How to Troubleshoot and Fix LED LCD TV Vizio and Sharp flatscreen No Picture but sound Adventures in Vintage AudioThe Pioneer SX-780 Stereo Amplifier. I just acquired a SX-780 receiver and it is mostly working except for the following issues. My son said it just faded out over a couple of seconds and quit; we found the 4A slo-blo fuse out when we opened it up. If you don't need those options, you can save yourself about. Thanks or all your help so far. Hey so I bought a Pioneer VSX receiver about 4 months ago and it suddenly stopped working. Role Audio Sampan review. On one of the websites, I saw that it was written PAC0101A=STK411-230E. The SX-1980 IS the greatest by a landslide. FOR SALE: Pioneer SX-780. Pioneer Series 20 System. I measured the DC offset directly from the speaker terminals and all measured 0Vdc,also my ohmmeter measured no shorts across spkr terms or around the STK's. 25″ / 6mm too tall. Electric Guitars Acoustic Guitars Bass Guitars Amps Effects and Pedals Drums and Percussion Pro Audio Keyboards and Pioneer SX-727 Stereo Receiver. Get free help, tips & support from top experts on pioneer sx 316. The FM tuner is great too, it has no problem picking up stations over 120 miles away! The SX-780 had some of the same features the SX-980 had, but it was rated at less power. We are located in Vancouver, Washington. You wouldn't think this could be much of a "shootout", but, think again A recapped Pioneer SX-1250 (that are currently going for anywhere from $2-2. I still have and use my SX-1980 but I am bi-amping it with my Dynaco ST-70 tube amp. The SX-780, 1080, 1280 and 1980 are among the best receivers EVER built. They just go for to much money so I opted to try the Pioneer. 2-Channel Home Audio ; Anyone ever have a Pioneer SX-737? Sign in to follow this. Vintage PIONEER SX-880 Stereo Receiver 60 WPC NR. the audio left channel comes and goes in and out while in use. The receiver turns on but no sound comes out of the speakers. View and Download Pioneer SX-7 service manual online. they use the same owners and service manual. All lights work am am/fm signal work. This receiver was brought in by the original owner for trade in for a bigger model. These are on the schematic just to the right of the power packs. Pioneer SX-780 no sound What is meant by 'does the relay pull in'. I have compiled a list of recent sales for many of the popular vintage receivers. JVC JR S201 AM/FM Stereo Receiver Works Great, PIONEER SX 950 STEREO RECEIVER OWNERS MANUAL PRINTED, Excellent Vintage Sansui G 5000. Find many great new & used options and get the best deals for Vintage Pioneer SX-780 Stereo Receiver at the best online prices at eBay! Free shipping for many products!. Download Pioneer SX780 Audio Amplifier Car audio systems and stereo equipment, amplifiers, speakers, subwoofers, cd changer, mp3 player - Pioneer, Alpine, Sony, Kenwood, Clarion, JVC - service manuals and repair guides. 05% This unit came in with a faulty STK-0050 Power Pack. Browse items by group & manufacturer Electronics > Automobile > Audio > Pioneer > ( there are 472 files in this category ) Car audio systems and stereo equipment, amplifiers, speakers, subwoofers, cd changer, mp3 player - Pioneer, Alpine, Sony, Kenwood, Clarion, JVC - service manuals and repair guides. Marantz Sa8003 Super Audio Cd Player Sacd Rc002sa. Duration : 2. Company in Washington state service audio/ video home electronics. No sound from Pioneer SX 780 Post by NuBe2vintage » 06 Apr 2012 00:00 I am very new to electronics and am a definite noviceso please take it easy on me if possible. The black face is a deep black and shows no signs of fading. Stored and decided to sell it. Pioneer HPM-100s are a great match for the SX-1050 and are awesome in the bass. Click here for tips on using our search. Produced between 1977 and 1983, Series 20 components were based on simplicity of design, meticulous craftsmanship, and the finest parts available. 5K on fleabay) and a stock HK-730, that I cleaned, adjusted and Deoxit'd (bought this one for $250 about 6 months ago). Replacing the regulator is not hard; I like to mount them to the power amp heat sink, but this is more involved and the transistor must be insulated and wires run to the circuit board. 1988 Elite Series Brochure 14 Mb. Pioneer Sx-316 Manual View and Download Pioneer SX-727 operation instruction manual online. I am going to try to pick up some DeoxIT tomorrow at the only Radio Shack in town still open, to clean the pots and switches. I'm selling my Pioneer SX-780 Stereo Receiver, it is in very good condition, every single function works perfectly with no issues what so ever. AUDIO SERVICE MANUAL. So I picked up this beautiful Pioneer SX-780 stereo receiver at a garage sale for $5 yesterday, I was assured it worked but when I got home I couldn't get any audio out of my speakers or my headphones (Could hear very very faint audio out of my headphones). Here we have a nice Pioneer SX-3800 Receiver. Pioneer SX-780 Repair Replacing the shorted output darlington transistors STK 0050 of my AM FM Stereo Receiver Pioneer SX 780 by a new pair. Has fantastic sounding FM tuner and awesome non-switching amplifier for great sound and no audible distortion. Troublesome transistors have been replaced to make sure there will be no pops, crackles, or other unwelcome noises appearing on your sound stage for many. There is a small click associated with the change and the sound cuts off when this happens. Company in Washington state service audio/ video home electronics. Plenty of fakes about, however, and these are commonly. The FM sound is a bit darker than the Pioneer SX-727's, and the AM is richer than the 727's and is better for DXing. I bought a Pioneer SX 880 and have been happy with if for the couple of weeks I've been using it. 30 or 35 wpc, but I believe they are honest watts with low distortion. I got a very good bargain on my SX-980, so I didn't expect dramatic results. The case was made by VintageHifiAudio. The stereo light also does not come on, is this because it doesn't go to center. Vintage Pioneer SX-780 Receiver. I still have and use my SX-1980 but I am bi-amping it with my Dynaco ST-70 tube amp. Took it to the shop. You’ll notice that the meter faces are black instead of white to improve the. Has a few scratches, the end of the power plug has been cut on but still worked. Great sound. Followers 0. Also, the more power an amp has, it doesn't have to work as hard so it may last longer. Duration : 2. I was real impressed with the sound of the Unit. I have a pioneer sx-950 with no sound output. I bet it sound close myself. Do not recorded tape for long periods. Dale, MHF-139 has drawings of the PC boards, parts lists, schematic, dial cord stringing, etc. Produced in 1974 it churns out 35 watts per channel. Audio Asylum - General Asylum: REVIEW: Pioneer SX-890 Receiver by Tuneman - General audio topics that don't fit into specific categories. Stereo Receiver SX-780 Radio Pioneer Corporation; Tokyo, build 1978-1980, 1 pictures, 31 schematics, Japan, tubes, semiconductors, Broadcast Receiver. This amp uses STK modules instead of output transistors, and these very commonly fail, due to overload, etc. Reply to Thread. Tuning scanning is driven via the computer controlled LED's in rapid consession. In the late 70's Pioneer started using output IC's instead of discrete transistors, in the SX-780 for example. 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. I've tried the FM as well as phono input. There's obviously power going to it but for some reason there's no sound. Receiver sounds great, tune pulls in stations very well. I think that unit must have the most complicated front face in the universe! So, in went the SX-780 and out went the STR-AV 1020, currently on R&R. Some minor issues to fix yet, but it sounds pretty good. Register today and start selling your audio gear! Home > Classifieds > DIY and Repair Supplies > Pioneer SX-580,SX-680, SX-780 Receiver Parts - Assorted Items FOR SALE: Pioneer SX-580,SX-680, SX-780 Receiver Parts - Assorted Items. Does anybody have the schematics of the PIONEER receiver SX-780? After a long night of operation the relay is not engaged and of course no audio. Found 200 records in Search of Vintage Asylum. com/manual_library/pioneer/sx-780. Plug a set of headphones in, if they sound fine then it's not the amp, your problem is a patch cord or connection someplace. Get free help, tips & support from top experts on pioneer sx 316. with an exception of a little crackling when i turned up the volume. PIONEER SX. Plenty of fakes about, however, and these are commonly. Then after about 2-3 months of maybe once weekly use, no output, powers on but nothing. He also put a heat sink on the the transistor to bring down the temp. SX-780 Receiver pdf manual download. Equalizer in PIONEER STEREO RECEIVER SX 780 SERVICE MANUAL 42 PAGES ON A CD SX 255R, PIONEER STEREO RECEIVER SX 1250 OWNERS MANUAL FREE S/. This is the Pioneer SX-780. Please specify your question about PIONEER ACV-161-0 VOLUME POT SX-580 SX-680 SX-780 SX-880 SX-980 SX-550 100K:. About four years ago I started using it again after several years. Must give name and number for a response and ask for an appointment to pickup. Th guy who sold it to me was a complete moron. The Pioneer SX-790 is a receiver in the solid state amplifier category. Plenty of fakes about, however, and these are commonly. 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. All stereo units are shipped Fedex or UPS No USPS. Vintage Pioneer SX-780 sounds better than Outlaw Audio RR2150 * A little info on the Pioneer SX-780 and really love the sound of this thing. I just picked up a truly near mint SX-780 at my local Goodwill for a whopping 14. I would like to hook up a powered subwoofer using the B speaker terminals. Computer Controlled Stereo Receiver. SX-780 S 3 Mb. REPRINT of the manual listed in title. Read Details. I have an old Pioneer SX-780 stereo amp, and it works and sounds fantastic for speakers. I have a pioneer sx 780 that I just purchased. The SX-980 is basically a slightly restyled SX-950. Everything You Need to Know About Choosing a Pioneer SX 780. Postings are free for hobbyists. I thought a nice SS unit for my friends to use as a comparision would be a nice toy to have. The SX-780 is in the series of black dual black lit output meters, as well as tone defeat, integrated protection with a rating of 45W @. Loading Unsubscribe from Aaron Hartley? Cancel Unsubscribe. They were the uncompromising top sellers in the international market receiver that you could buy in the HiFi-Studios. Equalizer in PIONEER STEREO RECEIVER SX 780 SERVICE MANUAL 42 PAGES ON A CD SX 255R, PIONEER STEREO RECEIVER SX 1250 OWNERS MANUAL FREE S/. About four years ago I started using it again after several years. AM/FM Stereo receiver. We sell parts and components for TV and vintage audio gears. There is 1 cherry case available. Friend resoldered transistor that got so hot it melted solder. Marantz Sa8003 Super Audio Cd Player Sacd Rc002sa. Pioneer SX-780 (most popular receiver of all time) Jul 20, 2019- Pioneer SX-780 (most popular receiver of all time) Discover ideas about Pioneer Audio. I bought a vintage Pioneer SX 780 receiver back in 2013 and it’s been working well until recently. The person submitting the question reported that the protection relay was failing to kick in and turn on the outputs. Pioneer Stereo Receiver SX-780 (Vintage) Defective. It delivers a continuous power output of 35 watts per channel, min RMS at 8 ohms, from 20 to 20,000 Hertz, with no more than 0. This IC is available on ebay but because of currency exchange rate and freight charges to Malaysia, it is very expensive. 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. Ad Description. We specialize in Vintage Marantz, Pioneer, and Sansui. He had to buy a bulb kit no big deal $8. To my amazement, the SX-780 (at 45 watts/channel) sounds plain amazing. This stands for: -S (silver vesion)-K (black version) Forum topics on the Pioneer SX-780. Preview of PIONEER SX-780 [2nd page]. 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. Pioneer Sx 680 Schematic Pioneer SX-680 Pioneer Audio. com Today were showcasing a customer Pioneer SX-780 Receiver. It's the Pioneer SX-980 and was produced from 1978 to 1979 and was the last of the 900 series receivers from Pioneer. I think it largely depends on the speakers you are wanting to drive and the size of the room. Equipment Exchange » Electronics - Audio and Video. I Bought A Pioneer Sx-780 Of Ebay It Was Discribed In Good Condition But With No Sound I Got It Today And Pluged It In, Sure Enough It Has No Sound, I Checked The Fuses And They Look Good, I Tried A And B Speakers Still No Sound. The SX-780 was 1978-1980, 8 tracks were pretty much fizzling out in favor of Cassette decks, and of course everyone had a turntable as well. It was the last of Pioneer's 700 series receivers and was very well built. This unit made my cheap speakers sound. 28) Posted by Bold Eagle on 2003-06-23, 15:09:44 (162. Shop with confidence. This unit was working one year ago. I have a pioneer sx-950 with no sound output. Vintage Sound & Vision > Pioneer SX-780 Vintage AM/FM Stereo Receiver. I replaced protection board transistors and capacitors and I still have the same problem. Most Pioneer model names can have the addition -S or -K. If you don't need those options, you can save yourself about. The sound has been incomparable to my new amplifier. I will check the Vdc on the STK's and post. PIONEER SX. speakers to hear for myself. Pioneer SX-780 Receiver Owners Instruction Manual Reprint [Plastic Comb] on Amazon. One thing I do think is that the ones ending with 80 are the same as the ones ending in 50, except the 80's have watts meters in addition to the tuning meters. Pioneer SX-780 Stereo Receiver How to Troubleshoot and Fix LED LCD TV Vizio and Sharp flatscreen No Picture but sound Adventures in Vintage AudioThe Pioneer SX-780 Stereo Amplifier. The SX-780 has been just great. 28) Posted by Bold Eagle on 2003-06-23, 15:09:44 (162. The relay clicks about 4 seconds in and the dial bulbs work. with an exception of a little crackling when i turned up the volume. 30 or 35 wpc, but I believe they are honest watts with low distortion. Fantastic condition from a non smoking home. I have a really nice vintage Pioneer SX-780 stereo receiver for sale. Vintage Pioneer SX-780 Stereo Receiver Parts Or Repair Please Read | eBay Has an excellent deep rich sound, as expected, for a relatively low powered receiver. I assume this is a relay issue, am I correct and can I repair this myself?. Amply pioneer sx-780,nguyen zin như mới,5,7tr. Pioneer Sx 1980 - Classifieds: Pioneer SX 1980 Monster Receiver, PIONEER and JENSEN vintage audio, Vintage Pioneer SX 3700 Stereo, looking for vintage stereo receivers. I have a pioneer sx-780 with no sound. Larry (December 22, 2009): The 790 and 790w4 are Black dial face versions of the 780. You'll notice that the meter faces are black instead of white to improve the. As many 12 models, including the two stereophonics, from 2 x 65 watts for the SX-850 up to the SX-950 with a 2 x 85 watts. Find many great new & used options and get the best deals for Vintage Pioneer SX-780 Stereo Receiver at the best online prices at eBay! Free shipping for many products!. I rotated it in and out of my vintage system for quite a while until I bought a Fisher 500b. It was the last of Pioneer's 700 series receivers and was very well built. And what did my ears discover? The 450 actually sounded better. I thought a nice SS unit for my friends to use as a comparision would be a nice toy to have. I have a Pioneer amp model SX-780 (older) and need to have it repaired.