Also, I did a lot of a/b comparisons by using the preamps 'rec out' button for switching back and forth with my saved eq curves, so I do think it's definitely different than before. It could possibly be that the prior/default settings from the PO were set all the way up. However, when I first hooked it up a few weeks ago, the volume was the same as when bypassed. The spec's state a '0db gain' with +12db / -12db range, but in reality, the possible adjustments are +4db / -20db. I was wondering if indeed this is how the EQ is supposed to work. Should I just try replacing all the caps? There's only about 25 or so and easy to reach.Īny and all suggestions much appreciated. If anyone has this I'd love to take a look. Looking at the service manual for the 7030, it mentions to reference the 7020 manual, so wondering if there's more info there. Guess I could use this as a 'cut' equalizer but annoyed as I shouldn't have to do that.īeing an electronics novice, befuddled as to next steps. One other observation, if I turn all the 'sliders' to +10db, the volume is about the same as bypassing the eq. Might be a little louder, but I cant tell. Will go ahead and try swapping c93 to see if that helps.Įdit. Could these ICs be bad? Looks like these are available online. It's labeled as NC (assuming not connected) but measures 0v instead of 1.0V. Unfortunately, I'm a total novice with electronics, so not sure where to start.įound the service and owners manuals here for easy reference.Īs an update, checked the voltages at the pins for the ICs and all check out except pins 28 on IC1 and IC2. Looking at the service manual, I can't see any specific steps or adjustments, but the schematics are provided. Will be glad to take close ups of anything if that helps. Shall I just try replacing c93 the the 'suntan' cap as a test, or is there a more scientific way to narrow down what the problem might be? Adjusting the EQ settings actually works, so it seems everything is working and I am suspecting the AMP sections. I've tested the voltage at all the test points on the board that have the voltages labeled, and all checks out. In my unit, all capacitors appear to be ELNAs and the originals as I can't find any evidence on the solder side of these being replaced, and have found threads with folks saying that they also had Elnas as OEM.Ĭouple more shots from the top, showing the boards. Unfortunately, it's radial and the voltage is not the same. In my spares, I do have a 160V 10uf cap that I could try as a replacement. In my particular case, the sound isn't distorted, but very low, as opposed to the person above's issue. So I am thinking the amp section in the EQ is not working.Ī web search suggests checking capacitor c93, but I don't have a capacitor checker. Here's the eq, doing it's thing with the top off. (either with patch cords or the pre-amps bypass function) Turning the unit off, and it's just slightly louder, but still ~20db less loud than if the unit is bypassed. When using the eq's bypass mode, the volume doesn't increase. I've ruled out the preamp by using jumpers on the processor out/in. I am guessing this amount, because when using the attenuate function on my pre-amp, it seems to be about the same volume, when bypassing the processor circuit. I've got a GE-7030 equalizer, that has developed an odd condition.Īll functions work, sound is clear on both channels, but ~20db lower in volume than the input.
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