Sony CDP 750 Mods, help me

[Pocoyo]

Hiii

I buy old CD Player SONY CDP 750,
i want to mods some parts to make it better
all function in there were still works great

In the first time i have trouble in optical reader
maybe it is need change with a new one
but if somebody have experience change it
with better optic which can change it the old one
( A little mods is OK ) Please let me now

I really need your help, please help me
Regards, Jeffry

 

[Pocoyo]

I have search in diyaudio posting
but all just talk about TDA 1541A

I want this CD can work as good as
another best CD Player

I will attach some picture here
I really need your help, please help me
Regards, Jeffry

 

[Pocoyo]

found the cd optical

i found the seller who sell cd optical ksa 150a worth US$ 40
so total cost was US$ 60 now

and the cd start to singing now
looks great with tda 1541 black in it

 

[Pocoyo]

CD Value was US$20

I bought this CD from my friend
CD Player value was US$ 20

after some hearing looks like this CD
sound looks like too light and too thin

so i prepare to change some capacitor
with the new one

 

[Pocoyo]

change the caps

i change some electrolit capacitor with the same value

on the main supply
elna 4700uf 35v to nichicon kg 4700uf 50v
elna 3300uf 35v to panasonic fc 2200 uf 50v
elna 470uf 35v to blackgate f 470 uf 50v
elna 330uf 35v to blackgate f 470 uf 50v

on the dacs
elna 470 uf 16v to elna cerafine 470uf 50v
elna 220 uf 16v to elna cerafine 220uf 50v
elna 10 uf 50v to blackgate N 10uf 50v

on the output stage
elna duorex 47uf 16v to Elna silmic 47uf 50v
nichicon fx 470uf 16v to elna cerafine 470uf 50v

 

[Pocoyo]

sound too high

i change others caps with nichicon FG Muse
looks like the old caps was lighter now

i change the elna silmic 47uf 50v with BGN 47uf 50v

now the sound is listenable and musically
even my wife said it's sound good

 

[Pocoyo]

after change other caps

after i change the other caps on these cd
looks like the cd display was brighter
im very glad to have this cause i didnt know
where too find the display if it is really broken

i make some cd test with some capacitor change
before i continue my cd mods

 

[Pocoyo]

what happen

when i look this pcb in the first time
there was resistor 18R 5W connect to the diode

i dont know, what for the connection ?
but the connection was made by sony service
what i have i do to repair this

 

[Pocoyo]

schematic cdp 750

i got schematic for cdp 750 if you need it
please pm me

 

[Tube_Dude]

i got schematic for cdp 750 if you need it
please pm me

Hi, Jeffry

Thank you a lot.

Regards

Jorge

 

[ide2003]

Hi Pak Jeffry

please check your mail, I've pm'ed you

Thanks
TeguhPS

 

[laiviethl]

Mail to me

Thank you I Vietnamse
My Mail laiviethl@yahoo.com

i got schematic for cdp 750 if you need it
please pm me

 

[navidstat]

I have Sony CDp 750 too. I want to Modify with tube buffer . please Send for me Schematic of this player. thanks a lot.

 

[navidstat]

modify

I modifyed this player with pcc88 telefunken tube buffer and some change in dac circuits. sound is very good on this price.