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Settings are not being stored

When setting the bass,treble and radio stations, once the unit is switched off they are no longer there when you turn it on again. How can i do this so I do not have to repeat the process?

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It sounds to me u do not have your mem.hooked up to your batt.

Posted on Apr 25, 2009

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When i change stations on my radio it changes all the settings on bass and tremble on my 2007 grand prix?


Hi Nick,

Your radio might save the bass & treble settings with each station. Try choosing a station, set the bass, treble and any other variables (mid-range, etc.) and then SAVE the station to a button. Do this for all of the buttons / stations you like.

If this doesn't solve the problem, tell us about the radio (AM/FM/Cassette/CD and Factory or aftermarket - in which case we'll need to know the make and model of the radio.

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First try making sure you are holding the reset button down long enough to reset the unit to factory settings. This can be up to 20 seconds. You will have to completely reconfigure the unit after that.

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Wire diagram 10335223


Anyway long story short, I was looking at the circuit boards of both radios and found a small 8 pin chip that was a 4Kb EEProm .
I figured this could be where the vin is stored and maybe other vehicle settings that can be changed by through the radio.

I tried to exchange these EEProms between both radios with the rationale that I would bring the vin and settings from one to the other but this did not work.
It results in a 'CAL ERROR' message for ~1-2 secs when the radio is on.
An interest side effect is that Theftlock was completely bypassed :) :) :) :)

So I returned each EEPROM to the radio they belonged to
but left pin 8 of the EEPROM not soldered/connected. (pin eight is power to the EEPROM)

Except for the CAL ERROR message for a 1-2 secs when I turn on the radio, all works perfect.
All sound settings, bass, treble, radio stations, resume place on the cd/mp3 are stored when the vehicle is shutdown too.
All integration/Class II features:
Chimes, OnStar, dimming, off when door open etc work fine too :)

Bottom line, just find the 9355093 8 pin serial EEPROM, take a soldering iron and a very small screwdriver/knife.
Heat pin #8 and lift/pry *very* carefully so it no longer contacts board.

that's it.

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If they reset when you turn off the radio (or the car) it is possible that you have connected the power wiring wrong. There are two 12v (+) wires. One that connects all the time to the power block (fuse block) and that one supplies continuous power to the radio unit and another that connects to the ON-OFF (ussually controlled by the Start Up Key) power side of the fuse block. If these are not connected correctly the radio re-sets everytime the key is turned of. One way to verify this is to check if yo loose your selected raio stations too.
Hope it helps.

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Sheerwood rv4080 r receiver /online manual


I think you might have a failure of a memory retention capacitor. These are small odd looking capacitors that store voltage for memory chips.
Look for something like this:

a4d6171.jpg

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Pressing the SEL button doesn't bring up, a Treble/Bass option, well, certainly not on my model, which I inherited when I bought my car a few weeks back.
I found this question when I came across the same issue myself and the original poster has probably solved it by now.
There are a lot of buttons on the unit but I discovered, after a lot of messing around and eq/XDSS button on the lower right hand side of the unit, which when pressed hard and held down, will "take out" the XDSS option, which I think supplies the "excessive" bass.
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There are 2 "User" EQ options, which, with a bit of playing about with, will probably give you the perfect Treble/Bass set up you want, though I haven't had time to play with them, or work them out, yet.
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Rich.

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Hi. SOunds like another case of power problems. Your deck has 2 power wires. One is yellow th eother is red. One is constant 12 volt battery power, the other is a switched 12 volt power, only has power with the ignition key on or on accesory. Get yourself a test light. I almost bet you do not have the constant 12 volt power to the deck, therefore your deck cannot hold its presets...

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