Memory Problem Dual Deltafex
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Memory Problem Dual Deltafex
My silver face Dual Deltafex won't hold memory anymore. Is there a battery inside the unit or am I consigned to a manual input every time?
- JamesPaul
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Re: Memory Problem Dual Deltafex
I am relatively confident that all those old fex amps had a battery in them.
Open it up, drain any power supply filtering capacitors, and take a look around. I think most were the computer button cells, 2016, 2032, etc.
Open it up, drain any power supply filtering capacitors, and take a look around. I think most were the computer button cells, 2016, 2032, etc.
James Paul's PeaveysEnzo wrote:I find if the amp is working, that is a good point to stop fixing it.
Decade, Classics, Ecoustic, Windsors, VYPYR, Triple XXX, XXL, VKs, Bandit, JSXs, VIP, Piranha and a Penta.
Re: Memory Problem Dual Deltafex
my unit now has sort of steady tinny crackle that goes louder with the reverb effect .
I dont see any battery for the memory - they could have used a Flash Memory chip .
Somebody went in to fix this before it went to ebay as the glue supposed to be on top of the screw was under it.
I will try the scope and try locate he source. I it is not a bad opamp then there could be no fixing this due maybe to custom ROM code in the SOC .
noelmem1
I dont see any battery for the memory - they could have used a Flash Memory chip .
Somebody went in to fix this before it went to ebay as the glue supposed to be on top of the screw was under it.
I will try the scope and try locate he source. I it is not a bad opamp then there could be no fixing this due maybe to custom ROM code in the SOC .
noelmem1
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- pcb
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- sn
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- main board
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Re: Memory Problem Dual Deltafex
cleaned the board with Contact cleaner and brush , drying it today under the sun , then let me try it out tonite , if still , then there are 6 opamps to try replace . The TDS220 Tek scope is out of commission due to old display - darn LCDs they die after 20 years .
noelmem1
noelmem1
Re: Memory Problem Dual Deltafex
oh yes ,i have pulled cleaned , lubed with oil based contact cleaner the 28 pin Chip in the socket - the primary unreliable socket connection- they should have used the gold plated round hole sockets .
noelmem1
noelmem1