2017 Sansui Serial Number Database

[LBPete]

9090DB,817022275,vutd

Thanks, your 9090DB was built on assembly line 81 in February of '77. It was the 2,275th unit off that line that month.

@academia50, thanks every serial number improves the database.

@Reidy12, looks like you have been busy this month. Thanks for your detailed reporting.

- Pete

 

[Reidy12]

Hi Pete,

Just edited the previous post, maybe after you collected as I just saw your reply:
S-2100U,2687,Reidy12,FB Vintage Sansui Amplifiers USA

Yeah, busy catching up!

 

[academia50]

@academia50, thanks every serial number improves the database.

Pete

You are welcome !
I am working on this AU4900, and I have found differences between the installed components and those indicated on the circuit. Do you think I should open a new thread or comment here?

 

[Reidy12]

CD-alpha 607,608121709,Reidy12,FB Sansui Lounge
AU-222,831050402,Reidy12,FB S-P

 

[adrimen]

BA-F1,210030118,adrimen
CA-F1,210030142,adrimen
CA-F1,210100087,adrimen

 

[LBPete]

Hi Pete,

Just edited the previous post, maybe after you collected as I just saw your reply:
S-2100U,2687,Reidy12,FB Vintage Sansui Amplifiers USA

Yeah, busy catching up!

Bruce, please be more specific. What did you edit? Is this a new serial number or an edited serial number? I don't see anything like it in what you have posted this month.

- Pete

 

[LBPete]

@adrimen, Welcome to AudioKarma Exclusively Sansui. Thanks for making your first post a serial number!

You are welcome !
I am working on this AU4900, and I have found differences between the installed components and those indicated on the circuit. Do you think I should open a new thread or comment here?

The published service information and the actual unit are almost never 100% the same. If you look at the top right margin of any of the schematics, there is a statement in three languages saying: "Design and Specifications subject to change without notice for improvement." Small difference are very common but there are also cases where significant design changes occurred and those are worth tracking.

It's best to start a thread in the main Sansui forum. More people will see it there and it will be easier to find in a search.

- Pete

 

[academia50]

Yes, I agree, the warnings: We can improve everything, you are warned "...
However, there are incomprehensible cases... I suppose it must be one of those errors that no one wanted to take care of in those years, and consequently, today, no manufacturer provides service manuals or even circuits of what sells, something unfortunate.
I'll open a new thread with my "discovery", thanks!

Preview: "Only 3900"
"Only 4900"
But the two values of R are the same!

 

[LBPete]

I worked in the technical publications department of a large Japanese manufacturer company for many years. Service information is typically produced before production begins so it can be available at the time the product goes on sale so it often doesn't contain changes that are made during production. It's get one manual done and move on to the next because new products keep coming and you just can't keep going over the same model. It comes down to time and money.

It's enormously complicated to get all the details correct. You see these errors on schematics, board diagrams and the silk screening on the actual boards. Don't loose sleep over it. That said, you are certainly welcome to start a thread with what you have found. It's useful information and people working on that model will appreciate it.

- Pete

 

[LBPete]

OK, here some specs on October's serial numbers.

560 serial numbers posted.
538 after posted duplicates removed
333 new serial numbers added to the database after 195 existing serial numbers dropped out.

Here are the serial numbers in no particular order that need clarification due to conflicts or invalid numbers:

800L	819071052	Reidy12	FACEBOOK Sansui Classics USA 117V		can't find an L model
AU-V7600B	612073274	Reidy12	yahoo.aleado.com Japan JDM	T-tag SANSUI-F	can't find and example online
P-30	660030285	marktplaats.nl			can't find and example online
SC-1050C	322010812	Reidy12	FACEBOOK Marketplace Melb AUS		SR-1050C ?
9090DB	817194569​	Reidy12	FACEBOOK Vintage Sansui Amplifiers USA		invalid month
AV-7100	317430364​	Reidy12	FACEBOOK Marketplace Melb AUS		invalid month
AX-7	9171004547​	Reidy12	yahoo.aleado.com Japan JDM	T-tag SANSUI IN KANJI	10 digits
CD-X311ii	698001291​	marktplaats.nl			month digits are zero
MA-7	2380980072​	Reidy12	yahoo.aleado.com JDM	T-tag SANSUI IN KANJI	10 digits
SR-929	327680080​	Reidy12	ebay.com.au USA JDM		invalid date
AU-alpha 707L Extra	439124020​	Reidy12	ebay.com.au Japan JDM	T-tag AZUMI	L model? non L in database
AU-D707F	220090333​	Reidy12	Reverb JDM	T-tag SANSUI in Kanji	"Extra" in database
C-2301 Vintage	215050019​	Reidy12	FACEBOOK Sansui Electric Chile JDM	T-tag SANSUI IN KANJI	conflict with TU-D99AMX
MA-7	836070112​	Reidy12	ebay.com.au USA		Conflict, is 3rd digit correct, no others in '76, maybe 8
SP-3500	91102511​	Reidy12	FACEBOOK Marketplace Melb AUS		Conflicts with AA-3900

If you guys can clarify these numbers I'll get them in next month's report. Thanks!

- Pete

 

[Reidy12]

Bruce, please be more specific. What did you edit? Is this a new serial number or an edited serial number? I don't see anything like it in what you have posted this month.

- Pete

Added that new serial to the already posted list.

 

[academia50]

........ Don't loose sleep over it. That said, you are certainly welcome to start a thread with what you have found. It's useful information and people working on that model will appreciate it.

- Pete

Okay, here it is, thanks.

Sansui AU4900 Diagram inconsistencies Vs. installed components (or not)

I'm dealing with the now infamous pops and crackles from this amp. Only because I am very hard-headed and retired, I insist on repairing it. So far I have followed the advice I found on this forum (mostly) and others, but no success. I begin by pointing out that in the manual obtained (on the...

audiokarma.org

 

[Reidy12]

Hi Pete,

Apologize for my several errors and also happy to add confirmation that 3 items seem correct! You know I text file import the lists into Excel so I can see the separated columns to check for SN length and missing or incorrect delimiters ( , . ) and funny looking models and still missed some. Doesn't fix typos, or poor eyesight !!

So it's a 'team' effort and in the same no particular order, the corrected comma strings are below with my added comment. Also I have included photos where indicated.

800,819071052,Reidy12,FB Sansui Classics USA 117V	See Photo….drop the L?
9090DB,817101569,Reidy12,FB Vintage Sansui Amplifiers USA	19 should be 10 and 6th digit is 1
AU-alpha707L extra,439124020,Reidy12,ebay.com.au Japan JDM,T-tag AZUMI	Correct Model & SN, see photo
AU-D707F,220090333,Reidy12,Reverb JDM,T-tag SANSUI*	Correct Model & SN, see photo
AU-V7500B,612073274,Reidy12,yahoo.aleado.com Japan JDM,T-tag SANSUI-F	Yes, incorrect Model - should be AU-V7500B
AV-7100,317030364,Reidy12,FB Marketplace Melb AUS	4th digit is 0, not 4
AX-7,917100457,Reidy12,yahoo.aleado.com Japan JDM,T-tag SANSUI*	Extra 9th digit 4 Corrected in post 30/10 See photo
C-2301,215050019,Reidy12,FB Sansui Electric Chile JDM,T-tag SANSUI*	Correct SN, see photo
MA-7,238090072,Reidy12,yahoo.aleado.com JDM,T-tag SANSUI*	6th digit 8 added incorrectly
MA-7,238070112,Reidy12,ebay.com.au USA	Ist & 3rd digit incorrect 238, see photo
SR-1050C,322010812,Reidy12,FB Marketplace Melb AUS	Correct SR-1050C
SP-3500	Correct, is SN for AA-3900
SR-929,327080080,Reidy12,ebay.com.au USA JDM	4th digit maybe a 0, See poor photo

 

[Reidy12]

Hi Pete, just noticed this from another AK thread by JimEGR in his Solid State Amplifier V. 06/27/23 listing: Maybe I've found the 1st one for the database......

"L Extra" - first use of nonmagnetic transistors, all later versions had these

1989 AU-a607L Extra 90 watts (JDM)

1989 AU-a707L Extra 130 watts (JDM) <<<<<<

1989 AU-a901L Extra 160 watts (JDM)

It's amazing what info is contained within the AK walls !!

 

[LBPete]

Hi Pete,

Apologize for my several errors and also happy to add confirmation that 3 items seem correct! You know I text file import the lists into Excel so I can see the separated columns to check for SN length and missing or incorrect delimiters ( , . ) and funny looking models and still missed some. Doesn't fix typos, or poor eyesight !!

So it's a 'team' effort and in the same no particular order, the corrected comma strings are below with my added comment. Also I have included photos where indicated.

800,819071052,Reidy12,FB Sansui Classics USA 117V	See Photo….drop the L?
9090DB,817101569,Reidy12,FB Vintage Sansui Amplifiers USA	19 should be 10 and 6th digit is 1
AU-alpha707L extra,439124020,Reidy12,ebay.com.au Japan JDM,T-tag AZUMI	Correct Model & SN, see photo
AU-D707F,220090333,Reidy12,Reverb JDM,T-tag SANSUI*	Correct Model & SN, see photo
AU-V7500B,612073274,Reidy12,yahoo.aleado.com Japan JDM,T-tag SANSUI-F	Yes, incorrect Model - should be AU-V7500B
AV-7100,317030364,Reidy12,FB Marketplace Melb AUS	4th digit is 0, not 4
AX-7,917100457,Reidy12,yahoo.aleado.com Japan JDM,T-tag SANSUI*	Extra 9th digit 4 Corrected in post 30/10 See photo
C-2301,215050019,Reidy12,FB Sansui Electric Chile JDM,T-tag SANSUI*	Correct SN, see photo
MA-7,238090072,Reidy12,yahoo.aleado.com JDM,T-tag SANSUI*	6th digit 8 added incorrectly
MA-7,238070112,Reidy12,ebay.com.au USA	Ist & 3rd digit incorrect 238, see photo
SR-1050C,322010812,Reidy12,FB Marketplace Melb AUS	Correct SR-1050C
SP-3500	Correct, is SN for AA-3900
SR-929,327080080,Reidy12,ebay.com.au USA JDM	4th digit maybe a 0, See poor photo

View attachment 3025651View attachment 3025644View attachment 3025643View attachment 3025649View attachment 3025648View attachment 3025647View attachment 3025646View attachment 3025645View attachment 3025650

800L, you found a new, previously unreported model. Before putting a new model in the database I always do an internet search to see it in person. I couldn't find an example of an 800L. Your photo clearly shows it. For a receiver of that era, the L typically designates that the tuner has short wave bands in addition to AM and FM. It's also interesting to note that its a single voltage North American model. Rare indeed.

9090DB, serial number corrected and added to the November list.
AU-alpha 707L, not sure what I was thinking for that one. I get a little punchy after a couple hours sifting through serial number data. I've added it to the November list.
AU-D707F, another one I went cross-eyed on. Added to November list.
AU-V7500B added to November list.
AV-7100, corrected and added to November list.
AX-7, corrected and added to November.
C-2301 Vintage, that serial number is already in the Database tied to a TU-D99AMX. Both units are from the same decade so one of the two serial numbers must be wrong. Since you provided an actual photo of the SN, I'll delete the TU-D99AMX and add the C-2301 Vintage to the November list.
MA-7,238090072, corrected and added to November
MA-7,238070112, corrected and added to November. I should have picked up on the first digit being wrong. There are none built on line 83 but a lot built on line 23.
SR-1050C, corrected and added to November.
SP-3500, the AA-3900 is already in the database so no action taken.
SR-929, 0 works, the 4th digit can only be a 0 or a 1 because it is the first digit for the month. Added to November.

I really appreciate you taking the time to chase these down. Accuracy is important.

- Pete

 

[Reidy12]

Glad to be part of the whole challenge of adding legit numbers to the database, l completely understand about 'a little punchy' with so many look-a-like numbers, look at my effort with just a few hundred......even with a cross check! I understand the software you use has good rejection capability so you can be presented with a sometimes daunting list to check out, I'll further try to reduce that with my efforts - specially the embarrassing typos.

Nice find with the 800L....and your model designation knowledge is impressive! I've tried to save photos for all lodged serials, certainly helps the confirmations.

Appreciate your effort & dedication to the cause Pete.....Cheers Bruce.

 

[PE9ZZ]

P-30:


CD-X311ii:


If I come across the P-30 I will post the label as well. It could be that I have the model wrong. Otherwise feel free to discard.

Edit: It's a P-50:

 

[PE9ZZ]

This week's harvest:
A-1000,531011245,catawiki.com
A-5,441060040,catawiki.com
AU-9500,213040183,catawiki.com
AU-D22,431121952,catawiki.com
FR-D25,411100732,catawiki.com
G-2000,"037070599",catawiki.com
R-7,851080877,catawiki.com
TU-S33,871120411,catawiki.com
AU-217ii,830070731,marktplaats.nl
AU-217,838110768,marktplaats.nl
AU-317,837111227,marktplaats.nl
AU-317,218110411,marktplaats.nl
AU-317,218090835,marktplaats.nl
AU-505,"022070039",marktplaats.nl
AU-555A,830060835,marktplaats.nl
AU-555,829020952,marktplaats.nl
AU-6600,835010047,marktplaats.nl
AU-719,229100685,marktplaats.nl
AU-X1111MOS VINTAGE,639020098,marktplaats.nl,JDM,T-tag
AX-7,918090147,marktplaats.nl
C-77,860083368,marktplaats.nl
CD-V1000,338020080,marktplaats.nl
G-5000,"018031787",marktplaats.nl
G-5700,859030717,marktplaats.nl
P-900,80500475,marktplaats.nl
P-D30,333020956,marktplaats.nl
R-70,879120797,marktplaats.nl
SR-232,428072428,marktplaats.nl
T-E550,626122625,marktplaats.nl
TU-217,848052133,marktplaats.nl
TU-4400,"025030556",marktplaats.nl
TU-5500,224110082,marktplaats.nl
TU-D33X,665075207,marktplaats.nl

 

[Reidy12]

Local eBay & gumtree run attached....

The 5000 has a C leading the serial and the 2 AV-33 have consistent but temporary looking serial labels. The 7070 is a panel only. Photos attached


.

 

[LBPete]

Thanks guys. You sometimes see a prefix like the C on the 5000 on some of the equipment from that era. Haven't any idea of it's significance but continue to include it in the Notes field.

- Pete