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Never thought I'd be doing this... So here goes... HHScott R376 Marantz 2220B Marantz SR-7012 McIntosh MA-8900 MCS 3249 Pioneer SX535 Realistic STA64 Realistic STA 2200 mosfet Realistic STA 2250 Sansui G5700 Sansui G7700 Sansui AU D11ii, (x2) Sherwood S-7450 Sherwood S-7650 Sony DA3000ES...

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.

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.

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...

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

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

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...

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.

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...

I am measuring the plug straight off the transformer

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...

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...

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...

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

Thanks I'll go with the 820ohm.

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...

No All I have extra are some of the boards.

Thanks , That's great info.

Greetings, I'm currently restoring a Sansui AU-D11ii from two trashed units. The most complete amp is a earliest version of the main amp board F-4296, the less fortunate unit has the later F-4296. (there is a thread on this topic) http://audiokarma.org/forums/index.php?posts/7694072/ I'm...

I must say after some more break-in time the ns555's sound amazing. They are totaly differnt sounding speakers. Very happy

Those are 39uf on the band pass not 3.9uf

Hello I thought I would share my latest speaker project. It starts with my 6 year old NS-555. They have been great surrounds for all that time. I have always thought they were a tad week on the lower end and could use a bit of help on opening up the top. Knowing that a lot of people have these...

Yes you are correct. There are no short foil side orange jumpers.

That's actully a Marantz AV8801 into a restored Yamaha MX830 power amp. I do love the B&W's the other larger speakers are some Fisher ST451's that I purchased in 1979. They have been completly updated with new drivers and crossovers. When we move to our lake home upon retirement I think the...

Hello I thought I would share my latest speaker build. I had a pair of Morel St 728 tweeters that I bought on sale awhile back and was needing a winter project. I found a kit at Madisound.com that uses Morel supremes so I used that recipe. Purchasing parts from Madisound, partsconnexion, and...