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Vintage threads from the first ten years

Ibanez SD-9

2/2/1998 10:46 PM
Terry	Ibanez SD-9 I just picked up an SD-9 tonight. It's o.k. sounding, not as good as I'd like, I didn't have a chance to try it out extensively before I bought it. The funny thing is, you can hear a slight fuzzy sound in the background when playing with the pedal off! The distortion control even affects the colume of this quiet, fuzzy noise. I opened it up, the chip inside is a JRC4558 (d?), it says 1557 underneath this. The circuit board says Maxon on it. I did some more experimenting and found that this noise pretty much disappears if there is a pedal in between the guitar and the SD-9, even when it's off. e.g. gtr>OD-1>SD-9>amp. I've only experienced this once before, with a UE300 I had. This also occurred with the TS portion of the unit. Is this a common Ibanez problem? WHy does it occur? Is it repairable? Is the JRC4558d the desirable chip? Also, what does the date code 1557 mean? I also have an SM-9, not a big fan of this either. Let me know what you think. Terry

2/2/1998 10:46 PM

Terry

Ibanez SD-9

I just picked up an SD-9 tonight.

It's o.k. sounding, not as good as I'd like, I didn't have a chance to
try it out extensively before I bought it.

The funny thing is, you can hear a slight fuzzy sound in the background
when playing with the pedal off! The distortion control even affects the
colume of this quiet, fuzzy noise. I opened it up, the chip inside is a
JRC4558 (d?), it says 1557 underneath this. The circuit board says Maxon
on it.

I did some more experimenting and found that this noise pretty much
disappears if there is a pedal in between the guitar and the SD-9, even
when it's off. e.g. gtr>OD-1>SD-9>amp.

I've only experienced this once before, with a UE300 I had. This also
occurred with the TS portion of the unit.

Is this a common Ibanez problem? WHy does it occur?

Is it repairable? Is the JRC4558d the desirable chip? Also, what does
the date code 1557 mean?

I also have an SM-9, not a big fan of this either.

Let me know what you think.

Terry