Dead Dx7II
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Im a noob at this. I have a dead dx7II and I get no readings measuring dc voltage for the -12v,+12v and 5v pins. I also checked the fuse and its fine. What should I check when the psu seem completely dead? Is there any easy way to check the switch?
Re: Dead Dx7II
This should've gone in "Help", not this unrelated section. I flagged it for moving, but no one seems to have noticed. Maybe you want to try flagging it again.
Needless to say, please be very careful when dealing with high voltages - if you are in any doubt whatsoever, get a trained professional to do this - which I am not. And naturally, I can't be liable for any accidents, etc.
Inputs/outputs of rectifiers, voltage regulatorss, transformers, other things involved in transforming the input AC.What should I check when the psu seem completely dead?
Which pins? On the output of the vregs? Or the inputs to some particular chips later on the PCB?I get no readings measuring dc voltage for the -12v,+12v and 5v pins.
Seems simple... When the switch is on, does the input AC reach its output side?Is there any easy way to check the switch?
Needless to say, please be very careful when dealing with high voltages - if you are in any doubt whatsoever, get a trained professional to do this - which I am not. And naturally, I can't be liable for any accidents, etc.
Re: Dead Dx7II
Hey there!
As db0451 has said - if you're not sure about tinkering - DON'T do anything - and always make sure the AC plug has been removed from the wall socket...
There's a T1.25A fuse on the left of the power regulator board (it should be labeled) that could have popped. These fuses mostly look like little glass tubes. If you remove the fuse and use a digital multimeter set to continuity (the one that makes a beep when the probes are touched together), hold the probes at each end of the fuse. If it beeps it's good. If not, it's bad...
If bad - then replace with a similar fuse - if good then there's a more in-depth fault. One that should be tackled by a competent service tech, i'm afraid.
Best,
Andy.
As db0451 has said - if you're not sure about tinkering - DON'T do anything - and always make sure the AC plug has been removed from the wall socket...
There's a T1.25A fuse on the left of the power regulator board (it should be labeled) that could have popped. These fuses mostly look like little glass tubes. If you remove the fuse and use a digital multimeter set to continuity (the one that makes a beep when the probes are touched together), hold the probes at each end of the fuse. If it beeps it's good. If not, it's bad...
If bad - then replace with a similar fuse - if good then there's a more in-depth fault. One that should be tackled by a competent service tech, i'm afraid.
Best,
Andy.