Sansui 9090DB-----PARTS KIT FOR PREMIUM RESTORATION

Description

This listing is for a kit of parts needed for Premium Restoration on the Sansui 9090DB.
The
parts in the kit, will enable you to renew your unit to a high level of performance and reliability.
Any pictures showing an 9090DB is an example.
No complete units are for sale on this listing.
BIG BONUS!!!!! I can hear you thinking: “What if I start this and get stuck and don’t know what to do next?”
Fear not!
This kit comes with a well detailed instruction sheet which will be very helpful to you or your technician.
Also,purchase of this kit entitles you to one free fifteen minute phone consultation.
Compile your questions, contact me so we can set up a time to talk, and I will point you in the right direction.
When you buy my kits, you are not left out in the cold!
Check my feedback!
I have serviced the Sansui 9090DB since they first came out.
I see them frequently now for restoration work so I know exactly what they need at this time in their lives.
Service needs change over time.
When a lovely piece like this gets to forty years old, it needs some general help.
Most of the 9090’s that come in for service are not outright blown up.
They frequently work…..somewhat.
They are, however, full of old capacitors, noisy signal path transistors, heat fatigued voltage regulators, and bad relays.
Of course, they are in dire need of cleaning and alignment.
This sort of job can be undertaken by a qualified technician or a serious hobbyist.
Of course it helps to have the precise parts needed in hand, along with their precise locations.
This kit is meant to supply that need.
It is not a “paint by number” for those with no experience, but with moderate test equipment and some technical skill and patience, good results can be had.
Recommended Test Equipment:
Multimeter, Variac
with ammeter (5 amp or greater), an oscilloscope is useful if you need to signal trace, but is not always necessary.
The service manual is invaluable and may be had on line.
Try HiFi engine.
The kit includes the standard and usual parts required on the following boards.
The parts will be in individual bags for each board.
There will be a list of parts for each of these boards with schematic designation.
There will be a procedural instruction sheet.
You will find the instruction sheet to be very useful as it will contain a lot of information derived from the service experience on this model for forty years.
This kit is not guaranteed to solve any and all problems.
If your unit has an outright defect, it may be something in addition to the standard and usual.
Great care should be taken to get polarities and transistor basing correct.
Careful and tidy workmanship pays off.
Be prepared to trouble shoot if you make a mistake or have additional problems.
Equalizer Circuit Board.
F-2653
Driver Circuit Board.
F-2624
Tone Control Circuit Board.
F-2544
Power Supply Board of RF Section.
F-2619
Power Relay Circuit Board.
F-2657 (new relay included)
Power Supply Circuit Board.
F-2656
C704, C705.
Filter Capacitors
The dolby board has been ignored because nobody uses that any more.
The capacitors in the kit will vary
but will be selected from the following:
Power supply applications will be mainly Nichicon VZ, PW, and FW.
On the other boards, they will be Nichicon FG, KW, FW, KT, VZ or Elna Cerafine or Silmic II.
Filter Capacitors will be usually Nippon Chemi Con or Kemet, and some others.
The capacitors will all be electrically appropriate but will often be different in physical size from the originals. The semiconductors in the kit will be well vetted substitutes for the original Japanese numbers.
I have been using all of these parts for quite some time, and they perform very well.
The kit does not contain lamps as some folks want incandescent and others want LED so lamps should be purchased separately.
The kit does not contain tuner section parts as tuner work should only be attempted by tuner experts.
The kit does contain the power supply filter capacitors.
When all of these parts are replaced, and the unit is cleaned up and alignments are done, reliability is enhanced, and the sonic quality is astounding.
They knew how to do stereo back in the old days.
So why should you purchase a kit like this?
How will it solve your problem?
If you do not want to ship it to someone who is an expert in dealing with this specific model, or if you think your local tech doesn’t know the model quite well enough, this parts kit is just what you need.
You can present your tech with the precise parts that must be replaced.
That will certainly help.
What is more important though is the instruction sheet.
The instruction sheet starts with general procedural instructions, then goes on to discuss each of the PC boards.
What to do….what to watch out for….how to be sure that it is done correctly, that it performs like it hasn’t in years, and that it is stable, it will perform well for years.
What could be better?
With this kit, and with a patient and reasonably competent installer, you can get the kind of results you would not have thought possible.