Recent content by ecommers

  1. ecommers

    Au D11ii Transformer Question

    You are correct about the battery. The reason I didn't think of that was I just replaced it a month ago. Must of been a week from the start.
  2. ecommers

    Au D11ii Transformer Question

    With that mystery solved I found both ub-152's were bad. Lucky I had two from a parts unit. Control board voltages are now all correct. Q1 on the EQ board is getting 17 volts at the collector so I've got some work to do there.
  3. ecommers

    Au D11ii Transformer Question

    I found the problem. All three pins 79, 80, and 81 had been pushed so hard that they gave way from the foil on the back and were not making contact with the board. Now I'm getting the correct readings. This amp has been fighting me all the way. I will win the battle. Thanks Hyperion for all...
  4. ecommers

    Au D11ii Transformer Question

    I did this work prior, recapped board replaced diodes 21 & 22 with a pair of 22 V 1/2 watt zener's ( TZX22C-TR), check all the resistors Replaced R21 & 22. *(R22 was bad). Check C21 & 22 ok. All transistors & rectifiers checked OK with an Atlas DCA75
  5. ecommers

    Au D11ii Transformer Question

    Any modern replacement ? I get 82 @ + 356mV DC and 84 @ - 176mV Dc.
  6. ecommers

    Au D11ii Transformer Question

    I believe I found part of the problem the fluke 87 I was using was giving me the readings I posted in the beginning of the thread. with my other meter this is what I'm getting Orange Grey Orange Plug disconnected from F-4292 measuring at the plug socket directly coming from the transformer...
  7. ecommers

    Au D11ii Transformer Question

    82 reads 0.62 vDC and 83 reads 0.00vDc Meter set to DC I get 0.267 pin 79 and 0.644 on pin 81.
  8. ecommers

    Au D11ii Transformer Question

    I am probing into the socket it self and black is grounded to chassis the meter is set to AC. When I do as your suggestion black on 80 I get 18.7 volts on either side. That's on the transformer that came with the unit, one spare, and one from a working AU D11ii. So three different transformers...
  9. ecommers

    Au D11ii Transformer Question

    I am measuring the plug straight off the transformer
  10. ecommers

    Au D11ii Transformer Question

    Hey Guys I'm working on a unit I picked up on e-bay awhile back. All transformer leads are with-in specs except for orange(79), Grey (80), and orange (81). Schematic shows 20 0 20 volts at those pins. The measurements are AC Orange-79 10volts, Grey-80 4.5 volts and orange-81 20 volts ( 10 4.5...
  11. ecommers

    AU-D11II zener diode bypass question

    I just read this thread and thought I'd take a look at the two Au D11ii that I have. In comparing the right channel boards F4267 one has the zener diode and the other has the yd2.4 constant current diode. The serial numbers for each are 654019782 (zener) and 673117748 (crd). I also have a parts...
  12. ecommers

    AU D11ii, G99x, G90x, G77x, and d77x Service Bulletin resistors ?

    TIME and PATIENCES ! Make sure you have lots of room on your work bench. I find it very helpful to first remove the transformer. Mark all your sockets and unplug. Desolder the one transformer white wire going to (F-4287 Protector/power supply board).It really helps having all that weight...
  13. ecommers

    AU D11ii, G99x, G90x, G77x, and d77x Service Bulletin resistors ?

    SN 654019782 The one I'm working on SN 673117748 My first one Both are AU D11ii Been busy this winter with other restorations. G-7700 G-8700db SN 810080274 Sansui SE-7 Fisher CA-271 (for my sister) HK 330b PS Thanks for the Trophy
  14. ecommers

    AU D11ii, G99x, G90x, G77x, and d77x Service Bulletin resistors ?

    Thanks I'll go with the 820ohm.
  15. ecommers

    AU D11ii, G99x, G90x, G77x, and d77x Service Bulletin resistors ?

    Has anyone done this upgrade? The reason I'm asking is I'm rebuilding another AU D11ii and as I read the instructions it saying to replace R1 thru R4 with 820ohm which is fine except the AU D11ii has 510ohm resistors populating those spots. I'm thinking to replace the same value as that's what...
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