Hi,
I somehow missed the previous few posts the past couple days.
The picture of the built module is a pic I sent Ray some time ago. We found that I had a minor error on the board. So I revised the board a bit and had them made again.
The picture of the above board is the revised board, and is the one people have received from me.
The picture of the fully built module that I posted a page or two ago, is made on the board in the pic above.
Sorry for any confusion.
Steve
I somehow missed the previous few posts the past couple days.
The picture of the built module is a pic I sent Ray some time ago. We found that I had a minor error on the board. So I revised the board a bit and had them made again.
The picture of the above board is the revised board, and is the one people have received from me.
The picture of the fully built module that I posted a page or two ago, is made on the board in the pic above.
Sorry for any confusion.
Steve
PSU capacitors, Voltage regulator, bypass capacitor.
http://www.raylectronics.nl/frame_it_en.html?http://www.raylectronics.nl/cd63_mods_en.html
http://www.raylectronics.nl/frame_it_en.html?http://www.raylectronics.nl/cd63_mods_en.html
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Thanks, that looks like a great source 
I am now removing the muting circuit, but I've managed to cut the wrong transistor. It's transistor QN03 (2SC1740S, 50V-0.15A). So now I have to get a new one. Can I replace it with any 50V-0.15A transistor?
I'm also a little confused by this sentence (about removing the muting circuit): "Remove U207, U211 and U262 (and cut trace)". Is it enough to just remove these jumpers or do I have to do something else? I'm not sure what's meant with "(and cut trace)".
I am now removing the muting circuit, but I've managed to cut the wrong transistor. It's transistor QN03 (2SC1740S, 50V-0.15A). So now I have to get a new one. Can I replace it with any 50V-0.15A transistor?
I'm also a little confused by this sentence (about removing the muting circuit): "Remove U207, U211 and U262 (and cut trace)". Is it enough to just remove these jumpers or do I have to do something else? I'm not sure what's meant with "(and cut trace)".
What's the matter you start with mute? First, study a little the tracks, blocks, function. Start with PSU, it's more simple at first!
Take a look on page 10 of 43/53/63 SM, and then pag. 13.
For transistor replacement see pag. 19 s.m. at Qn1. And google it.
Take a look on page 10 of 43/53/63 SM, and then pag. 13.
For transistor replacement see pag. 19 s.m. at Qn1. And google it.
Thanks, that looks like a great source
I am now removing the muting circuit, but I've managed to cut the wrong transistor. It's transistor QN03 (2SC1740S, 50V-0.15A). So now I have to get a new one. Can I replace it with any 50V-0.15A transistor?
I'm also a little confused by this sentence (about removing the muting circuit): "Remove U207, U211 and U262 (and cut trace)". Is it enough to just remove these jumpers or do I have to do something else? I'm not sure what's meant with "(and cut trace)".
Good to know. I've practiced desoldering with quite some Velleman kits I made and destroyed most of the PCB's. Now I had to desolder the legs of the part I accidentally removed and it took no effort at all.
And that is how I discovered lead-free solder is awful. I will buy good solder before I do anything now.
I still have some basic questions I haven't found an answer too:
1) Which voltage should the WIMA capacitors for the PSU be?
2) Decoupling capacitors confuse me a lot. I have no idea where the legs should be connected to (for example when adding a 100n X7R to a capacitor).
That's all for now. I've already learned a lot and I'm intrigued by these electronics.
And that is how I discovered lead-free solder is awful. I will buy good solder before I do anything now.
I still have some basic questions I haven't found an answer too:
1) Which voltage should the WIMA capacitors for the PSU be?
2) Decoupling capacitors confuse me a lot. I have no idea where the legs should be connected to (for example when adding a 100n X7R to a capacitor).
That's all for now. I've already learned a lot and I'm intrigued by these electronics.
hi all...
I've a cd-63mkii with a problem can't read cds , tried to change the pick-up (chg to VAM) by myself but still doesnt work at all ( no lens tracking or disc spinning) . then I switch back to original ones (CDM12), it now hv spinning for few seconds and lens focusing (unsure if the laser was light or not), BUT still "no disc" display.... could someone help... thanks.
I've a cd-63mkii with a problem can't read cds , tried to change the pick-up (chg to VAM) by myself but still doesnt work at all ( no lens tracking or disc spinning) . then I switch back to original ones (CDM12), it now hv spinning for few seconds and lens focusing (unsure if the laser was light or not), BUT still "no disc" display.... could someone help... thanks.
Hi Matthieu!
Nothing fried over here, I've just been busy with other technical stuff, like designing a small lasershow for my brother's band.
I still have the Black Gate N-type 100u/16V in my DOS, and i'm still very happy with it. Maybe a large film cap will perform even better, but those cost a fortune at 100uF... I don't want to make it much smaller, maybe 47 or 22u minimum, but still $$$.
Regards,
Ray
Nothing fried over here, I've just been busy with other technical stuff, like designing a small lasershow for my brother's band
.I still have the Black Gate N-type 100u/16V in my DOS, and i'm still very happy with it. Maybe a large film cap will perform even better, but those cost a fortune at 100uF... I don't want to make it much smaller, maybe 47 or 22u minimum, but still $$$.
Regards,
Ray
Hi Ray,
What's the advantage of that size of cap, I always thought anything around and above 5u kept the bass response respectable.
Have I misunderstood something (again!)?
Regards
Pete
Hi Ray & Pete,
and yes Pete, I was talking of DC blocking caps
Hi guys,
That's correct, 3u3 is the theoretical minimum for a cut-off frequency of 5Hz at 10kohm load. If your load is 20kohms, a 1u8 is the minimum, and so on. But then you are already in the transition zone of the high-pass filter this cap makes with the load. Attenuation of the signal is 3dB, and phase shift is 45 degrees. To move out of that zone, a bigger cap is needed.
Ray
QN03 is also part of the muting circuit. It mutes the display when you turn the power off. Without it, you will notice the display will fade away as the capacitors in the power supply discharge. This looks kinda cheap, so Marantz blanks the display as soon as the power is gone.
You can replace it with any generic NPN if you want to restore the function. Mind the pinning though.
Ray