Recent content by RuairiMutt

  1. RuairiMutt

    Marantz 1150 Left Channel Distortion.

    Sounds like a good place to start. Still learning the ins and outs, which transistors would these be? I know this is dumb to ask, but still learning the finer details.
  2. RuairiMutt

    Marantz 1150 Left Channel Distortion.

    Minor Update. It took awhile to arrive but I replaced the 2N4923 transistor hidden below the driver heat sync, H709, and while the one there was bad, it did not correct the issue. I connected up my DVM and checked the bias, Idle Current between J701 & J702 calls for 10mV at idle. I can't get...
  3. RuairiMutt

    Marantz 1150 Left Channel Distortion.

    Presently, I'm attempting to repair a sick left channel on this extremely nice looking stereo. When it came to me for repair, the left channel plays, but with a lot of distortion. It had been previously worked on. Used components were used, which I went ahead and replaced with brand new parts...
  4. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    Correct. H810 was shorted. I replaced all three though as I had them, and I did all this other work, I saw no reason to not replace them all out.
  5. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    Okay folks, I solved the issue with this stereo last night after going over the schematics and getting my eyes on the correct version of the schematic, as this is a very low serial number, I had to observe the early modifications Marantz made to these to get them "right", which is why some stuff...
  6. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    EDIT: I looked at the revised schematic for these from Marantz. It applies to low serial numbers, 1001 to 4900. Mine is in the 3000's. It mentiones R783 and R782 as being 1K trimmers, which is what I installed in place of the burned out one.
  7. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    UPDATE! I got it working. Somewhat; I'm dealing with a recent diagnosis from my doctor for Crohns Disease. So I have not felt like working much, finally feeling better, so I got back to this pesky thing and figured it out. I'm not totally sure what is going on though with the circuit. It looks...
  8. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    I started looking it over, I found a burned resistor in the R786 position. 120Ohm 1W. Replacing it made no difference.
  9. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    Also redid the measurement between J813 & J814 as stated, still seeing -45.6V
  10. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    I use all quality Nichicon Caps from Mouser. Power supply is done being recapped. Still having the relay issue where it's engaged as soon as the receiver is powered on. I rechecked the left amplifier, black to GND, Red to J757 and I see NEGATIVE 45.6V.
  11. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    Okay. I checked J813 and J814 and I had to use regular DC Volts on my DVM. I see -45 volts. So if I am understanding this correctly, I need to be looking at the right amplifier instead of the left? And just as due process I'm going to recap the power supply entirely.
  12. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    Got it. I'm going to get the amplifier pulled apart and I'll report back my findings tomorrow. I read somewhere else about an issue like this; Something holding it to rail.
  13. RuairiMutt

    Marantz 2270 Relay & Voltage Issues

    Okay. I have a Champagne 2270 on my bench with a very unhappy left channel amplifier. As soon as the power switch is pressed, the protection relay clicks on. As far as I can tell no one has by-passed this, or messed with the circuit, but the instant power is applied to the unit, the protection...
  14. RuairiMutt

    Sansui 9090DB "The Basket Case"

    Yes I believe this was the issue. I went over and found a blown 2SA1209 transistor, which I do not have a sub for, so I ordered out the correct parts, and will be replacing these. I'm going to go over everything again, this time I'll be using MJ21193 and 94 complimentary pairs. The transistors...
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