Marantz CD63 & CD67 mods list

[6h5c]

Originally posted by RCruz
I still have a small issue..... The remote only works if pointed at less than one inch from the sensor in the CDP.

I do not know what started this but it is like that for a couple of month now.

Try an electrolytic (10...47u/16V) in parallel with CY01 on the front panel PCB, worked for me. I noticed the IR receiver somehow becomes less sensitive when RY11 is replaced by an inductor.

Ray

[SimontY]

Originally posted by 6h5c


Try an electrolytic (10...47u/16V) in parallel with CY01 on the front panel PCB, worked for me. I noticed the IR receiver somehow becomes less sensitive when RY11 is replaced by an inductor.

Ray

Ray lurks and emerges with the answers!

[6h5c]

One has to keep track of things

[Fidelity Audio]

Originally posted by magilla

Also a public thanks to Brent for cleaning up my C1.

No problem, it will be posted tomorrow

Drill the back panel and use a nut and bolt for the tx. Most txs come with insulation pads

Brent

[RCruz]

Originally posted by 6h5c


Try an electrolytic (10...47u/16V) in parallel with CY01 on the front panel PCB, worked for me. I noticed the IR receiver somehow becomes less sensitive when RY11 is replaced by an inductor.

Thank you Ray

Even with new batteries, the remote only works at about 15cm from the CDP.

I will surely try this cap in CY01....I will solder it from the back of the pcb so I do not need to remove it. .....

Regards

Ricardo

[RCruz]

Originally posted by avr300
You must admit, it would be a pretty good reason and easy to fix.

[RCruz]

Originally posted by 6h5c


Try an electrolytic (10...47u/16V) in parallel with CY01 on the front panel PCB, worked for me. I noticed the IR receiver somehow becomes less sensitive when RY11 is replaced by an inductor.

Can I use a 10uF 35v Ruby ZL ?

The other option is a 120uF Pana ... too big maybe.

Ricardo

[avr300]

Just use one of the original ones, you must have a bunch of them after having upgraded the whole machine.

Just grab what comes handy.

[Fidelity Audio]

Also check RY11 for resistance. I've seen these go high resistance before, usually after the ribbon not being inserted correctly and shorting 5v to gnd. RY11 should be 4.7 ohm.

If these things mentioned in the thread do not not cure the problem then you may have a duff connector (or you are holding the remote the wrong way round )

Brent

[pzogal]

another thing about output stage, this time Ray's discreete.
how about substituting R11 with a pot ?
couldn't one adjust DC offset this way and get rid of the output cap ??

greetings,
Pawel

i am going to fit discreete output, I am just curious, the cost will be rather small for me, I just need some Rs and low-pass filter components