This is a more detailed follow up of my Electronics freezing up thread.
I'd like to know if this is a common thing and what is it known as? I call it Logic Loop.
A phenomenon whereas an Integrated circuit gets 'Locked' into a state and remains as such. And even after isolating the main power it remains in place and therefore causes the entire unit to fail in it's usual operations.
Causes:
Integrated circuits are complex pieces of technology and like all components - there is the threat of failure. It is thankfully rare but when it occurs, not having the relevant hindsight or experience can make it annoying and even expensive. Because of the complexity and density of the internal workings, the chances of the latter increase.
It could be a design flaw, a fault in manufacture, a power surge, bad grounding.
The list goes on but these issues are generic and can also cause problems elsewhere.
I use Integrated circuits as an example but there is the possibility of this being caused by a single Transistor; which are general purpose switches in many circuits. For a time I suspected faulty Capacitors that were leaking power to the chip and keeping the fault 'Alive' but I have since become sceptical.
Why does it lock - even after power off?:
Some level of data must be feeding into the tainted chip that makes it remember 'Where it was' so to speak, when powered down. It could be part of the Firmware or a list of commands stored in a ROM chip.
This is why, in my view why the loop remains. Various Gates that send appropriate data to other circuits jam up and the information stops.
So the unit is rendered useless.
What equipment can this occur in?:
Anything electronic that requires a series of commands to 'Boot' it up and bring it to life. It is a very rare occurrence and may have evaded conventional repair procedures, as a self-trained repair engineer I used many unorthodox methods with the risk of permanently destroying what I was working on. Or in the case of a Logic Loop - making an important discovery that has aided me greatly over the years and saved many items from the landfill.
Example:
I work with Jukeboxes as well as professional audio repair, sometimes the Coin Mechanism would reject coins. I powered down and restarted the (Digital) Jukebox and the issue remained. But, when I disconnect the Coin Mech multipin connector while the unit is on and then reconnect it - the coin Mech starts working again.
Any idea's people?
I'd like to know if this is a common thing and what is it known as? I call it Logic Loop.
Logic loop! An explanation of an electronic anomaly
What is it?
A phenomenon whereas an Integrated circuit gets 'Locked' into a state and remains as such. And even after isolating the main power it remains in place and therefore causes the entire unit to fail in it's usual operations.
Causes:
Integrated circuits are complex pieces of technology and like all components - there is the threat of failure. It is thankfully rare but when it occurs, not having the relevant hindsight or experience can make it annoying and even expensive. Because of the complexity and density of the internal workings, the chances of the latter increase.
It could be a design flaw, a fault in manufacture, a power surge, bad grounding.
The list goes on but these issues are generic and can also cause problems elsewhere.
I use Integrated circuits as an example but there is the possibility of this being caused by a single Transistor; which are general purpose switches in many circuits. For a time I suspected faulty Capacitors that were leaking power to the chip and keeping the fault 'Alive' but I have since become sceptical.
Why does it lock - even after power off?:
Some level of data must be feeding into the tainted chip that makes it remember 'Where it was' so to speak, when powered down. It could be part of the Firmware or a list of commands stored in a ROM chip.
This is why, in my view why the loop remains. Various Gates that send appropriate data to other circuits jam up and the information stops.
So the unit is rendered useless.
What equipment can this occur in?:
Anything electronic that requires a series of commands to 'Boot' it up and bring it to life. It is a very rare occurrence and may have evaded conventional repair procedures, as a self-trained repair engineer I used many unorthodox methods with the risk of permanently destroying what I was working on. Or in the case of a Logic Loop - making an important discovery that has aided me greatly over the years and saved many items from the landfill.
Example:
I work with Jukeboxes as well as professional audio repair, sometimes the Coin Mechanism would reject coins. I powered down and restarted the (Digital) Jukebox and the issue remained. But, when I disconnect the Coin Mech multipin connector while the unit is on and then reconnect it - the coin Mech starts working again.
Any idea's people?
