Wondered if anyone could help me out on this one...any suggestions greatly appreciated.
I have (for my sins) an Ariston EuroCombi SX20 MFFICE with manual programmer/timer (part 569294). The programmer/timer is not keeping good time and, generally, running slow - it's actually erratic. Sometimes okay, usually slow, sometimes fast.
Now I imagine that I probably need a new clock/programmer but they're a bit pricey so I'd like some more evidence - particularly since the control PCB was changed a few months back and I'm not sure that it has worked since that point.
So I disconnected the output connections to see if it would run as a clock but it then ran fast. Does anyone know if disconnecting the output connections of a programmer should make a difference to its behaviour. I guess my question is really whether they require a fixed output resistance to drive into - this would seem a bit of a risky approach to use in manufacture since much scope for things going wrong.
I realise that this is a bit of a specific one but any help or suggested tests appreciated.
I have (for my sins) an Ariston EuroCombi SX20 MFFICE with manual programmer/timer (part 569294). The programmer/timer is not keeping good time and, generally, running slow - it's actually erratic. Sometimes okay, usually slow, sometimes fast.
Now I imagine that I probably need a new clock/programmer but they're a bit pricey so I'd like some more evidence - particularly since the control PCB was changed a few months back and I'm not sure that it has worked since that point.
So I disconnected the output connections to see if it would run as a clock but it then ran fast. Does anyone know if disconnecting the output connections of a programmer should make a difference to its behaviour. I guess my question is really whether they require a fixed output resistance to drive into - this would seem a bit of a risky approach to use in manufacture since much scope for things going wrong.
I realise that this is a bit of a specific one but any help or suggested tests appreciated.