• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Sansui 5000

do you happe no know how the muting circuit works? when I pu the fuses in can hear when they connect and same way way with hooking them ups and disconnecting them just add a test to see if I can...
 
Is the flat side of Tr803 firmly against/attached to a flat on the heat sink oh Tr804?
What do you have for Tr801, did you leave the original?
 
for the tr 801 and the 803 the. KSC1845 was used. not yet but there is minimal heat being generated they are about 5-10 degrees warmer then ambient per my flir thermal imaging multimeter
 
Tr801: KSC1815, not 1845. Seems to be significant with 1040 boards, not sure about 6013 boards. Set Tr803 tight/right to heatsink before dismissing importance of the contact.
Check to see if you have signal off the filter board for lack of sound issues.
 
What type of signal am I looking for on the blue and grey wires that go to the inboard end of the boards?

as for the cs1845
I picked up a kit on eBay from peace love music and they assured me they were the right ones.
 
As I said not sure of 1815 for the 6013 boards as a necessity, observation based on other's results on zippy mod 1040 boards. FWIW 1815 work fine on the 6013 boards I've done.
To test/trace the signal you need some type of scope and a source. For source one can use a frequency generator app on a cell phone, 1000Hz sine wave. Just looking for a smooth waveform.
For simple work a cheap ebay oscilloscope can suffice. FWIW I was given a decently sophisticated portable scope and can only figure out its most basic operations, like the waveform.
Honestly considering the condition of your boards you may be better off starting fresh with reproduction 6013 boards. Unfortunately there is only one choice available at this moment, my preferred vendor is on hiatus and return is uncertain.
 
I was thinking and I tried a set of headphones and still nothing nbut it looks like per the drawing the headphones come off of the driver boards.
 
I am getting the voltages to the 807=810 transceivers so I'm not sure about the boards being the issue but I agree... if I get it working I will get new boards.....
 
I noticed the 5000x ran 2sc116 or 2sd88a while the 5000 and the 5000a had 2sd118 but not a single service manual has the 6013 in the main schematic
 
jnl1105 said:
I noticed the 5000x ran 2sc116 or 2sd88a while the 5000 and the 5000a had 2sd118 but not a single service manual has the 6013 in the main schematic
Click to expand...
Again, you're worrying about the wrong thing. You can ignore the small difference between these.
FWIW the 5000X schematic does have the 6013 board, just not the schematic in the commonly available service manual. NOT everything in the service manuals matches what's in the case. I've had 5000A units where individual components not only didn't match the manual but different units had a couple of different boards. Running changes often did not make it to the manuals. Originally the 5000X came out with the F-1040-1 boards.
The 6013 boards connect to the output transistors, fuses, coupling caps and the High/Low filter board. If the output transistors, coupling caps, voltages, and signal(from the filter board) are good the problem is in the 6013 boards. If you can't justify getting a cheap scope then find someone who has one to check the signal coming off the filter board. The cheap scopes might not be all that great but should be able to at least be used to trace a sine wave through the system. The only other way I can think of to check would be pull the signal wires off the filter board and connect another amp to the filter board. (not recommended)
Yes, the headphone jack is run off the amp boards.
 
Guido57 said:
Again, you're worrying about the wrong thing. You can ignore the small difference between these.
FWIW the 5000X schematic does have the 6013 board, just not the schematic in the commonly available service manual. NOT everything in the service manuals matches what's in the case. I've had 5000A units where individual components not only didn't match the manual but different units had a couple of different boards. Running changes often did not make it to the manuals. Originally the 5000X came out with the F-1040-1 boards.
The 6013 boards connect to the output transistors, fuses, coupling caps and the High/Low filter board. If the output transistors, coupling caps, voltages, and signal(from the filter board) are good the problem is in the 6013 boards. If you can't justify getting a cheap scope then find someone who has one to check the signal coming off the filter board. The cheap scopes might not be all that great but should be able to at least be used to trace a sine wave through the system. The only other way I can think of to check would be pull the signal wires off the filter board and connect another amp to the filter board. (not recommended)
Yes, the headphone jack is run off the amp boards.
Click to expand...
I have a very old scope that I have had for 40 yrs and it's from the Manhattan project "literally" but I have totally forgotten how to run it. I have no problem buying a newer one. but I do have a problem for the 2 weeks it will take to get here LOL
 
I've never used a vintage scope but I kind of have the feeling it might be simpler to use for simple tasks like displaying a sine wave. The unit I now have has functions beyond my needs but just to get the sine wave up I need to go through several menus. Perhaps a cheaper unit would have less options making it easier to do simple things. In my case as I never used a scope before I had a steep learning curve just to get running.
 
Then you need to simplest unit you can find so you have the most direct way to what you need. While I am somewhat competent in the digital world I do miss some parts of the analog world I grew up in.
 
You must log in or register to reply here.
Back
Top Bottom