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Sansui 9090 Service bulletins

gklainer

gklainer

AK Subscriber
Subscriber
In looking at the service manual, my F2436-1 Driver board is a little different than what is shown. Mine has the fuses on it with the resistors on the back. Is there a specific bulletin that outlines the changes? I couldn't seem to find anything doing a few different searches.

Thanks,

Gary
 
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LBPete said:
There were changes made to both the driver board and the power supply board. They are covered in this bulletin.

- Pete
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Thanks Pete.

You have been very helpful with all of my 9090 questions. I thought you had posted the link before but I just couldn't seem to find it.

Hopefully, it will get here pretty quick.

Gary
 
Sansui

gklainer said:
Thanks Pete.

You have been very helpful with all of my 9090 questions. I thought you had posted the link before but I just couldn't seem to find it.

Hopefully, it will get here pretty quick.

Gary
Click to expand...

Pete's one of the best! Always willing to help around here, posts about the "G" series too.
Casey
 
gklainer said:
In looking at the service manual, my F2436-1 Driver board is a little different than what is shown. Mine has the fuses on it with the resistors on the back. Is there a specific bulletin that outlines the changes? I couldn't seem to find anything doing a few different searches.

Thanks,

Gary
Click to expand...
Does anyone have the Service Bulletin they can send to me? I am going through my 9090 now, and want to do all the upgrades, etc. I appreciate all the help. This is a great site.
 
robdunn said:
Does anyone have the Service Bulletin they can send to me? I am going through my 9090 now, and want to do all the upgrades, etc. I appreciate all the help. This is a great site.
Click to expand...
I no longer have the 9090 but I still may have the service bulletin. Let me check and get back to you tomorrow.
 
The bulletin is in Digital Docks. I've updated the link in post #2 above.

- Pete
 
Last edited:
Please post the serial number for the database. Click on the link in my signature block.

- Pete
 
Pete

Can one tell if their 9090 needs the Service Bulletin changes to both the driver board and the power supply board by serial number?

Thank you
Charlie
 
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To my knowledge there is no serial number but the bulletin says the countermeasure was applied in April 1976. Any unit produced after that date should already have it. It's also pretty obvious looking at the driver board itself. If the driver board has fuses in plastic sleeves, it has the modifications.

Based on what is on file in the database, it looks like production of the 9090 started in August 1975. So there is roughly 8 or 9 months production that probably doesn't have the production change.

- Pete
 
LBPete said:
To my knowledge there is no serial number but the bulletin says the countermeasure was applied in April 1976. Any unit produced after that date should already have it. It's also pretty obvious looking at the driver board itself. If the driver board has fuses in plastic sleeves, it has the modifications.

Based on what is on file in the database, it looks like production of the 9090 started in August 1975. So there is roughly 8 or 9 months production that probably doesn't have the production change.
Click to expand...
Thank you for that info... I've got one here now that was made in Jan 1976 and doesn't have the SB changes... I noticed in the SB it says Europe Service Information, but I assume this SB applies for all units before April '76, regardless of conditions/issues? (or lack there of)

The unit I have here is original and working condition... Should all of these changes in SB still be implemented?
 
I don't know if this bulletin was issued in the US or just Europe. Regardless, the changes were implemented in production. It's obviously gone a long time without the upgrade but it could also fail tomorrow. The components in your 9090 are almost 50 years old. How lucky do you feel?

- Pete
 
JoshHendi said:
Thank you for that info... I've got one here now that was made in Jan 1976 and doesn't have the SB changes... I noticed in the SB it says Europe Service Information, but I assume this SB applies for all units before April '76, regardless of conditions/issues? (or lack there of)

The unit I have here is original and working condition... Should all of these changes in SB still be implemented?
Click to expand...
Yes...
 
LBPete said:
The components in your 9090 are almost 50 years old. How lucky do you feel?
Click to expand...
It is getting a full restoration, just wanted to confirm the SB should be addressed 100% of the time (especially with this specific SB with many significant changes)
Thx for confirming
 
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