This listing is for a kit of
parts needed for Premium Restoration on the Sansui 9090. The parts
in the kit, will enable you to renew your unit to a high level of performance
and reliability. Any pictures showing an
9090 is an example. No complete units
are for sale on this listing.
Note: If your unit is in need of this level of service, and you do not wish to tackle it and have nobody to do it for you, you can send it to me for service. The first step would be to run a diagnostic to pin down the exact condition and needs of the piece. I shall be pleased to help you with it. For more information, check this listing: Vintage Audio Components-----Repair Service-----Bench Check and Report
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 9090
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-2541
Driver Circuit Board. F-2436
Tone Control Circuit
Board. F-2544
Power Supply Circuit Board (RF). F-2431
Protector Circuit Board. F-2547 (new relay included)
Power Supply Circuit
Board. F-2546
Tone Control Circuit Board (2). F-2543
C703, C704. Filter Capacitors
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.