SOLD - FOR SALE: Sansui 9090DB Extensively Restored!**SOLD
Item #649372456Info: Sansui 9090DB Extensively Restored!**SOLD
||28.00 (kg) Calculate Shipping
||71.12cm x 60.96cm x 35.56cm
||8 - Very good (?)
Aug 11, 17 10:53am (PST)
Edited: Sep 07, 17 11:03am
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Here is one of the best all round vintage receivers ever made.
The combination of great looks and great performance really comes together and makes the 9090DB a must have for vintage audio buffs.
In fact it was a 9090DB that is responsible for me pursuing this passion for so many years. Was at a garage sale and fell in love with it. Brought it home,didn't work. Took it to a so called reputable shop 3x before they kinda got it working and besides all the back and forth they put a big scratch in the faceplate. When I complained about the damage all I got was a blank stare.
And so with that great experience I said there is got to be a better way. Learning to work on these units myself! Thanks to the internet and connecting with several audio buddies along the way I have learned a lot about vintage audio restoration. I still have that 9090DB but I haven't got over the big scratch.
I digress. Now back to this piece. Well I know my way around this series as I have restored many. As great as the 9090DB is Sansui used what they called fusistors in most of the circuitry.
They are the leading cause of failure in this series most often leading to shorted outputs. And it is not just an occasional issue. It is rampant.
I removed 20 of them from this unit. So the gist of the 9090DB is you need to get rid of those fusistors sooner than later and replace with quality metal film resistors.This unit still has the original outputs. They were pulled tested and reinstalled with new mica and thermal compound.for improved thermal management.
I recapped the driver board ( formerly had 14 fusistors on that board),recapped the protection/relay board and upgraded a failure prone resistor that is known to fail thus losing the protection LED. Recapped the power supply board,selector/eq board,push switch board and more importantly the rf power supply board.
The RF section power supply circuit board provides power to the tuner and the Dolby board. All signals pass through the Dolby board. So this board is very important. Unfortunately it too needs special attention.It produces a lot of heat. To the eagle eye you can see darkened sections on the board under the two 5 watt ceramic resistors. You can see heat impacted electrolytic caps. The two 5 watt resistors have listed and have darkened the chassis from their heat. If you were to look at the underside of that board you will see where the 5 watt resistors overheating has basically resulted in them desoldering themselves. There are several other components that needed to be resoldered as well as a result of the heat. You cannot get rid of the heat but you can take steps to better manage it and improve on component longevity and reliability. To help dissipate the heat away from these components a single 25 watt resistor is installed in place of the two 5 watt resistors and mounted to the chassis away from the board.. As well a heat prone cap is mounted with long leads and mounted on its side on the chassis in order to keep it away from the hot transistor it normally would live beside. Heat is not a caps best friend.
Then the rf board is set to the correct voltage.
You cannot properly clean the controls and switches on this unit without a lot of disassembly. You can see by some of the pics provided that one has to remove the top and bottom,remove face plate ,remove the tuner section portion of the chassis and then removed the controls from the chassis you need to access. Even then its still a pain.
I only use top quality caps and where possible replace low value electrolytic caps with stacked film caps,either Wima or Panasonic.
I also resoldered the display lamp board and put in new lamps.
All the infamous Sansui glue removed!
Amp section set to specs.
Now the cosmetics. The face plate and knobs are near perfect. The wood case looks great, There are a few nicks and a few long shallow scratches on the top of the case. As the scratches are not deep if the new owner was so inclined they could be sanded out with lots of veneer to spare.
Go the above link to see this unit working!
Any questions fire away.
For shipping costs ,
The ad has enough info for you to calculate shipping by going to Canada Posts website.
It may just be over Canada's weight limit. Won't know till packed so it may have to go courier.
I will provide my phone # to serious buyers. I prefer to chat about my work and meet the new owner.
I also provide a short video of the unit taken just before packing to the new owner.
I am a pro shipper.
I prefer EMT.
pdf of service manual and owners manual
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