Sansui 9090db driver board

Sansui 8080db manual stereo amfm receiver hifi engine. My dad has had this receiver for the last 40 years and recently they told me that it was in need of a. Sansui vintage amplifier resurrection, creating a modern. I will include a surprisingly wellwritten instruction sheet, but this is a fairly complicated and delicate rebuild, and you should know what youre doing and have a decent soldering iron and a dimbulb tester. According to peter, once you recap you never go back. Many of the sansui receivers from the 70s used an old, inferior integratedcircuit ic called the ba312. When i remove the driver board the unit comes out of. When i take out the driver board and turn the unit on the light blinks about 3 times and the relay kicks on and the green light comes on and its out of protection mode. Over time the driver boards start developing issues with the fuse resistors, varistors, diodes, transistors, and capacitors, and often the old parts are weak and failing. This protection light flashing red is a common problem with the sansui 9090 and 9090db recievers.

This receiver has been serviced and partial recap driver board and power supply recapped with all nichicon capacitors from digikey driver board fusible resistors replaced has all original toshiba output transistors pots and switches cleaned lamps upgraded to led inside cleaned, faceknobs removed and cleaned. One channel trips the protector relay, so im leaving that one disconnected for now, the other works fine for a few seconds then becomes increasingly distorted. It features 125 watts per channel into 8 ohms and has a frequency response of 20 to 20,000 hz. Sansui model 9090db receiver in excellent condition. Sansui 9090db receiver in need of a f2624 driver card not blank. Tuner board of the 9090, 9090db, qrx9001, qrx8001 and other sansui models. I was a boom operator on a kc5 so i brought it back with me to the states duty freei paid 800 dollars for everything. The sansui g8000 pure power dc stereo receiver is one of the biggest monster receivers. This is a brute and can drive anything at 125w a channel.

Deck 2copy 12, deck 1copy 12, deck 1, source, deck 2, deck 2copy 21, deck 1copy 21. Sansui 9090db after f2624 driver board rebuild youtube. Sansui 5000a driver circuit board f60 aw electronics. Wow, i just got a sansui 9090db from a friend for free. Sansui 9090db 8080db dolby board repair bg091 youtube. I got another g8000 as a project for me, it will eventually go to a friend as sort of a christmas present. Repair of the dreaded dolby disease commonly found on these units. Sansui repair qrx9001 repair specializing in qrx9001, 9090, 9090db and the sansui qrx line. Ebay is your best bet, but boards for the big sansuis can be pretty tough to find. This tells me there is something up with the driver board. I have never had anything close to the sound this receiver had. Driver amp board i did forget to take a before photo of, ive got to quit that.

Does anyone here have the schematic for this board. These are the upgrade boards that sansui provided to all 5000 series receiver owners as the final cure for the power amplifier problems that plagued that product for most of its production life. Page 1 of 3 1 2 3 next motnick ak subscriber subscriber. Our original performance verification report and a copy of the owners manual included from sansui.

The 9090 is the little brother to the 9090db series abd larger brother with 110w output compared to the 8080 sansui we featured a few months ago on a restoration. Another thing you think you know what your particular model sansui sounds. Sansui 9090db receiver in need of a f2624 driver card not blank please. If the front end of your unit doesnt pass audio in one or both channels to the final amplifier, you likely have this issue. Sansui 9090db major up date dolby board rebuilt signal path cap up date led lamps adjusted videos please read my full sale, it should answer most questions. Sansui 9090 driver board schematic sansui, and beyond. Also take the bottom cover off and check the two fuses on the protection board make sure they are good. The 8080db uses exactly the same driver board as the 9090db so the only difference in the amplifier section is a little less power and 4 output transistors. On the other receivers and amps, such as the 9090 and the au999, we. View online or download sansui 9090db service manual.

The 2000 is a different animal than the sansui 8080db, and 9090db. Sansui 9090db receiver in need of a f2624 driver card not blank please point me in the right directional find this. Included with the board set is a photocopy of sansuis installation instructions. Sansui 9090db very quiet speaker output sansui, and beyond. That resistor engineering change is probably what was interfering with those four caps. Removed the 6 screws on the cover, one screw on the driver board and unplugged 2 wiring harnesses.

Doa sansui 9090 technicalmodifications the klipsch. I followed chriss directions to check the 180 ohm resistors on the driver board. Im trying to resurrect a sansui 9090, and am having trouble with the amp driver board. If you cant get stereo from your fm signal, you might need a new one of these. These components are no longer available today and require donor units to procure. The overload circuit breaker began to flash red last week. This circuit board plugs into circuit board f2656 taken from a sansui 9090db where left channel was dead. The protector light does cycle through correctly and goes green after a couple of seconds so that is good.

Gregs sansui 9090 receiver driverps focused rebuild. Sansui 9090db manual stereo amfm receiver hifi engine. By focusing on driver boards, that is the most common part on amplifiers, i have constructed a table that is sorted by driver board number. Sansui 9090 driver board audiokarma home audio stereo. I bought a sansui 9090db in 1976 in japan and it gave me many years of service.

F2544, f2549, f2617, f2619, f2623, f2653, f2654, f2656, and f2657. Here it is one big restoration on sansui 9090 non db receiver. This sansui f60 driver circuit board worked without any issues before removal from a sansui 5000a receiver. The amp sections should have no discernible difference in sound. So this end of the puzzel was now fixed, i set the balance and bias for the outputs. Actually the 7070, and the sansui 9001 quad unit use the same driver boards as well.

Sansui 9090dbs were notorious for having small fusable type resistors go bad on the small driver board which sits in front of the heat sink, and is held in by a 2 screws for a black cover, with a white molex connector on top. I know i am dreaming but does anyone know where i could. Also, this is a later model with the newer driver board and all of the original factory fixesenhancements. One special category is monster receivers from the 70s and 80s.

I dont know for sure if the 9090 and the 9090db have the same driver boards or not thow. Sansui 8080db9090db f2624 driver board resistorcapacitor refresh scott derousse. We occasionally receive units missing their original driver board holders. Service manual sansui 9090db receiver download countless of free service manuals you find nowhere else. Sansui 9090db driver board recap community member, peter n sent in photos of a driver board partial recap. Sparkos labs is proud to offer the first ba312 upgrade for vintage sansui receivers from the 1970s.

In addition to the f2624 restoration kit, includes capacitors to recap the following boards. Sansui 9090db driver board repair audiokarma home audio. Liberal use of deoxit seems routine on that model and seems to cure a lot of the routine problems with the switches. Sansui f2624 driver board rebuild receiver recap kit for 8080db. Vintage sansui ba312 f2544 kit upgrade 880, 990, 8080. They also both use exactly the same preamp section except for the crossoverdefeat switches in the tone controls. Sansui 9090db receiver in need of a f2624 driver card not. Heat over time causes these resistors to open, or increase in value, causing the problem you are experiencing. Sansui 9090 rebuild tapeheads tape, audio and music forums.

If you are lucky this might be a simple and very jeep fix. This is exactly what ive hoped would happen, and im happy it helped other vintage gear enthusiasts. Sansui f60 driver boards for sale on ebay, iitem number. One of the most significant upgrades i have been installing in these vintage units is the upgrade from the original axial silicon diodes to ultrafast, soft recovery, low noise schottky to220 mounted rectifier diodes on a high quality fr4 custom pcb. Sansui 9090 rebuild archive tapeheads tape, audio and music. Hello, i just got a sansui 9090 and the protection light blinks red. My understanding is that this is a common problem for sansui 9090db. Refreshed the f2624 driver board after the protection light wouldnt come on. Sansui f2624 driver board rebuild receiver recap kit for 8080db 9090db qrx9001.

Sansui 9090db vintage stereo receiver recapped restored led lamps. Driver board power supply board new filter caps, the originals were 6800uf 71v, i upgraded them to 0uf 80v, the bass and overall power of the receiver benefited from this upgrade, the depth, detail and punch of the sound is tenfold better then when i listened to it with the originals. I picked up a very nice sansui 9090db last week that is stuck in protection mode. Here is what one user said about the two receivers. Services vintage stereo restorations sansui repair. I am deep into the a sansui 9090db, had blown resistors in the driver board and replaced, power amp and driver board ok and could drive them from my audio signal generator directly no problem. Discussion in exclusively sansui started by motnick, jan 30, 2018.

Sansui f2624 driver board rebuild receiver recap kit for. Hello, have a beautiful 9090 that unfortunately is missing its driver board f2436. This ic chip can be found on the tuner board of the 9090, 9090db, qrx9001, qrx8001 and other sansui models. Just the other day i went to a lawn mower shop to get some blades and low and behold there was a sansui 9090db on a shelf collecting dust. I bought my sansui 9090db in 1978 in the air force bx in okinauwa japan. From one of the earliest solidstate integrated amplifier, au999, to the newest international model, au911dg, sansui used the consecutive parts number for internal boards. Sansui model 9090db receiver from may of 1977 in excellent condition. The f2624 driver board is found in the sansui 8080db, 9090db, 890db, 990db, and qrx9001, which uses two of them. The sansui g8000 receiver was created at a time when japanese manufacturers were competing to produce the meanest hifi beasts, like this pioneer sx1250 i restored.

Sansui 9090db 8080db 9090 8080 power supply rebuild bg093. Rebuilding the power supply in a sansui 9090db 8080db 9090 8080 model stereo. Sansui 9090db 125w vintage stereo receiver recapped led lamps refurbished complete restoration with full electrolytic recap minus the fm tuner and dolby board. Sansui 5000a driver circuit board f60 original sansui 5000a tested driver board sansui 500. The other major difference between the db and 9090 is the output topology. When we work on this series, we make extensive repairs to the f2624 driver boards. Over the last few years since ive created this replacement board, quite a few people have used these to repair or upgrade their 9090dbs, as well as other sansui gear that use the same board. The sansui 9090db offers advanced technology in a stereo amfm receiver. The power supply for the sansui 9090db is built off two full wave ct bridge rectifiers with a. I wanted to document this in detail since i didnt with the last one.