Hi folks
Just wanted to pick your brains I'm an enthusiastic amateur but do have experience is soldering PCBs etc.
I have started tinkering with my Cambridge cd6 that I bought a few years. So this week I decided to recap the servo board. Bought nichicon caps and have slowly removed all the old electrolytic caps and replaced like for like. Plugged it in tonight and now the sled motor is running all the time and won't shut off. Took the board back out and doubled checked everything and it all seems good. I wanted a service manual and hifiengine have one but I'm not a member and can't download it unfortunately.
Does anyone have any ideas what would cause this ? The sled motor was erratic before and made strange noises when you ejected a disc but always worked ok.
Thanks
Just wanted to pick your brains I'm an enthusiastic amateur but do have experience is soldering PCBs etc.
I have started tinkering with my Cambridge cd6 that I bought a few years. So this week I decided to recap the servo board. Bought nichicon caps and have slowly removed all the old electrolytic caps and replaced like for like. Plugged it in tonight and now the sled motor is running all the time and won't shut off. Took the board back out and doubled checked everything and it all seems good. I wanted a service manual and hifiengine have one but I'm not a member and can't download it unfortunately.
Does anyone have any ideas what would cause this ? The sled motor was erratic before and made strange noises when you ejected a disc but always worked ok.
Thanks
Basically, you should not start such a project without a service manual or circuit diagrams. Take pictures of both sides of the circuit board beforehand.
It also makes no sense to simply swap out capacitors; high-quality (and cheaper) industrial capacitors are a better choice, especially on the servo circuit board. You should also select the capacitors according to their function. In some places audio capacitors, low esr types or polymer/mixed types are counterproductive.
Did you keep the capacitance values, or did you change/increase them?
Do you mean the motor from the drawer? Or the laser sled?
It also makes no sense to simply swap out capacitors; high-quality (and cheaper) industrial capacitors are a better choice, especially on the servo circuit board. You should also select the capacitors according to their function. In some places audio capacitors, low esr types or polymer/mixed types are counterproductive.
Did you keep the capacitance values, or did you change/increase them?
Do you mean the motor from the drawer? Or the laser sled?