"" JVC XL Z574bk cd player tweak it !!! ""

[mprivitera1]

JVC XL Z574bk cd player upgrade !!!

Hello guys,
I own this old CD player, still working. I do it on an upgrade, with budget of € 50/100. Where do I start ... I await advice ...

 

[picowallspeaker]

Hi, may I ask in which system it will take its place ?

 

[mprivitera1]

Hi, may I ask in which system it will take its place ?

Hello,
I do not have to replace it, but I want to tweak it ..

 

[mprivitera1]

moderators, you can change the title of the conversation so; "" JVC XL Z574bk cd player tweak it !!! "" "

thanks

 

[picowallspeaker]

The best upgrade is to make the mechanic vibration-free.
It won't look as the original as it has to be mounted and suspended with rubber bands. Then you can proceed in isolating the pcb and the transformer.

 

[Mooly]

moderators, you can change the title of the conversation so; "" JVC XL Z574bk cd player tweak it !!! "" "

thanks

🙂

(My advice would be to look at the opamps and muting transistors, perhaps replacing them with FET's)

 

[mprivitera1]

🙂

(My advice would be to look at the opamps and muting transistors, perhaps replacing them with FET's)

thanks

 

[mprivitera1]

The best upgrade is to make the mechanic vibration-free.
It won't look as the original as it has to be mounted and suspended with rubber bands. Then you can proceed in isolating the pcb and the transformer.

ok ... start with this 1st step. But once opened, can I do anything else?
thank you

 

[picowallspeaker]

Not much, at least you may follow Mooly's advice, such replacing Opamps -on which subject M. himself opened a thread about the pros and cons of doing it-
I only limit myself in replacing the output caps, which is already a hard job considering the fragility of the pcb lines.

 

[Sergelisses]

ok ... start with this 1st step. But once opened, can I do anything else?
thank you

the resolution of the picture ( schema ) is not very good !!!
make 4 pictures to have the totality of the schema

Serge

 

[mprivitera1]

Not much, at least you may follow Mooly's advice, such replacing Opamps -on which subject M. himself opened a thread about the pros and cons of doing it-
I only limit myself in replacing the output caps, which is already a hard job considering the fragility of the pcb lines.

ok ... I'm wrong, but the output does not have capacitors in series?

 

[mprivitera1]

see you later ....

 

[Sergelisses]

see you later ....

make a picture of the PCB .

 

[picowallspeaker]

with a little magnification, you may recognize the 3 stages ( ? a cap ! )
before the output: from it, the muting transistors ( they might be replaced by a relè, or reed ) then the coupling cap, and the 2nd order lowpass around the Op-Amp.

Maybe...a LC network instead of the 20-22 kHz active lowpass 😱