Welcome to EpoS Wizard!
Hi, just out of the blue my Casio TE-2000 stopped operating completely.........
Fuse is ok in plug, have stripped till down and found that on the power supply circuit board the outlet is a block of 4 wires that feed the till circuits........
This is what I have found regarding their values and what they should be according to to the markings on the board:
Black is GRN
Brown states +8v ~ tested and shows correct
Yellow states +5v ~ tested and shows +0v
Red states +10v ~ tested and shows +24v
At this stage, can only assume that this is where my fault lies,
Could this be a particular transistor, capacitor, diode etc, or would the whole board need replacing?
I am quite able to do the necessary repair but would appreciate any pinpointing of the fault and a good place for parts!
Many thanks
How good are you at electronics?
First thing you MUST do if you're going to touch the power board is discharge the capacitors. Even when unplugged for a while, the big ones can still hold a big (and sore!) charge.
Without doing more checks, I'd at least count on a capacitor change and probably the switching transistor too. It would probably work out cheaper to try and find a working board from a scrap machine.
How good are you at electronics?
First thing you MUST do if you're going to touch the power board is discharge the capacitors. Even when unplugged for a while, the big ones can still hold a big (and sore!) charge.
Without doing more checks, I'd at least count on a capacitor change and probably the switching transistor too. It would probably work out cheaper to try and find a working board from a scrap machine.
Thanks for that, yes I understand about holding current in the capacitors......I forgot to mention that out of the two identical transistors with largish heat-sinks, one heat-sink is just getting a little warm whilst the other is getting too hot to touch!
Would you say that from what I have mentioned the problem is with the power board?
Yes it is the power board.
From what you say about that transistor, it's a capacitor that's broken down allowing too much current flow.
Yes it is the power board.
From what you say about that transistor, it's a capacitor that's broken down allowing too much current flow.
Fantastic! Is there a way of testing capacitors, also do you think this would have taken out the transistor in your opinion?
Appreciate your help!
