Ronito6
Super Member
I can send you a 2sk97.
PM me your address and I can have you can have it in hand by next Friday.
If you can figure a contemporary replacement....the world will be a better place.
Sansui AU-X11 repair and restoration
- Thread starter smurfer77
- Start date
I can send you a 2sk97.
PM me your address and I can have you can have it in hand by next Friday.
If you can figure a contemporary replacement....the world will be a better place.
That would be interesting. Also, have one inbound myself from Canada, once I get it changed out would be glad to send you the old one to verify its suspected failure. When I pulled it the circuit board underneath it was pretty toasty. Testing dual fet's correctly is above my pay grade, my training (by choice) ends with critters that have three legs or less, discounting those special critters with glass containers 
-Lee
-Lee
Ronito6
Super Member
That would be interesting. Also, have one inbound myself from Canada, once I get it changed out would be glad to send you the old one to verify its suspected failure. When I pulled it the circuit board underneath it was pretty toasty. Testing dual fet's correctly is above my pay grade, my training (by choice) ends with critters that have three legs or less, discounting those special critters with glass containers
-Lee
A Tale of Two Transistors
smurfer77
Super Member
For completeness, here is the link to the 2sk97 thread I promised after receiving a sample for Ronito. About the 2SK146, I'm not familiar with that one yet.
No update on the AU-X11s, or anything else, as I'm still stuck overseas. But will be home next week!
No update on the AU-X11s, or anything else, as I'm still stuck overseas. But will be home next week!
Looks like you need to set it for 0V - the adjustment is titled 'Centre DC [0] adj-servo Adj- L & R ch'.
I can't read the above - but I'll guess the answer to your question is "There are different test points (TP) for the VR1 and VR2 measurements" - the document contains an error referring to TP-1 for both adjustments.
For VR1 - (TP-1) near the output transistors on the schematic shown.
For VR2 - (TP-2) near the OP amp at the bottom of the schematic.
For VR1 - (TP-1) near the output transistors on the schematic shown.
For VR2 - (TP-2) near the OP amp at the bottom of the schematic.
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"Who made control 0" - sorry, I don't understand what you are querying.
There are often errors in hi-fi service documentation, Sansui is often guilty of this, you just have to work it out for yourself. Unless someone has documented it here on AK - which is increasingly common now.
SanthoshA
Active Member
I myself have recently sourced the Sansui AU-X11, it arrived at my home a day back, it works perfectly with no issues, i am using it with a 100volt step down converter.
Is there anything i need to check say for example the basis in order to ensure it works fine in a long run.
I am yet to open it up and inspect the boards inside.
Can some please help with the service manual for the AU-X11, i can only find the service manual of the AU-X1 online.
Also what is the nominal DC bias value for the left and right channel to adjust bias, i would like to check and see if the bias is consistent and steady across both channels.
Thanks in advance for your time and support.
I am also going through threads and posts that would be useful for my restoration.
Attached are the pics.
Is there anything i need to check say for example the basis in order to ensure it works fine in a long run.
I am yet to open it up and inspect the boards inside.
Can some please help with the service manual for the AU-X11, i can only find the service manual of the AU-X1 online.
Also what is the nominal DC bias value for the left and right channel to adjust bias, i would like to check and see if the bias is consistent and steady across both channels.
Thanks in advance for your time and support.
I am also going through threads and posts that would be useful for my restoration.
Attached are the pics.
Attachments
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@SanthoshA - please start your own thread, otherwise it causes confusion.
smurfer77
Super Member
[/ QUOTE]
Проверьте. У тебя ошибка На плате не корректен транзистор Q1. Должен быть Q1-C1845.
Thanks. Yes it looks like you are correct, Q1 should be C1845. Here are the latest corrected versions of the driver board images - I don't doubt thee are other errors so please use with caution and always check what you have in your own boards.
smurfer77
Super Member
Thanks again. Yes those 3 diodes are MV103 (which measure characteristically very similar to the SV03), as was pointed out by @Ronito6 . I've updated the MV103 as well as clarified D11.
Replacements are shown here:
SV03, MV103 --> 3x 1N4150
SV04 --> 4x 1N4150.
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smurfer77
Super Member
Just thought I would point out that MV12's are two junction diodes - therefore should be replaced with 2 x 1N4150.
Thanks. Will edit/correct.
