Poor Serbian Man Optical Volume Control

[stoN_Cold]

Hello Zeonrider
I bought ZM some years ago.
Do you test any LDRs volume control?
Best regards

No, not finished yet

Strange, mine is not like yours

An externally hosted image should be here but it was not working when we last tested it.

Regards zeoN_Rider

 

[José Humberto]

Look post nº2 of this thread and must be least one more.

 

[José Humberto]

No, not finished yet

Strange, mine is not like yours

An externally hosted image should be here but it was not working when we last tested it.

Regards zeoN_Rider

I think your pcb is the first edition.
Thank you for the pic.

 

[stoN_Cold]

Look post nº2 of this thread and must be least one more.

?

Regards zeoN_Rider

 

[José Humberto]

?

Regards zeoN_Rider

Sorry, this comment was for LM317L

 

[Zen Mod]

you're right , but that was obviously mistake in post #2 http://www.diyaudio.com/forums/anal...n-man-optical-volume-control.html#post1675967

whatever , pcb is clearly made for T0220 package , and there is just one - normal and straightforward pinout for T0220 LM317

and , logically , table in Cookbook is having exact T0220 type reg .

as I said - I (we) would never use 100mA capable reg for 70mA CCS duty

so - just untwist those legs ......... or , even better - put new one in place

 

[José Humberto]

you're right , but that was obviously mistake in post #2 http://www.diyaudio.com/forums/anal...n-man-optical-volume-control.html#post1675967

whatever , pcb is clearly made for T0220 package , and there is just one - normal and straightforward pinout for T0220 LM317

and , logically , table in Cookbook is having exact T0220 type reg .

as I said - I (we) would never use 100mA capable reg for 70mA CCS duty

so - just untwist those legs ......... or , even better - put new one in place

The thing is I tracked the pcb some times, and think the correct was Adj-IN-Out

 

[Zen Mod]

http://www.fairchildsemi.com/ds/LM/LM317.pdf

 

[José Humberto]

I put the LM ok and get the same measurements.
I must revised other parts. Perhaps the resistors. Because the curret go to JMP02.
Thank you very much to alls
Best regards

 

[José Humberto]

Excuse me ZM I'm sorry a lot for spend your time with my mistake.

 

[Zen Mod]

just take your time

check all surrounding parts

I'm here often enough

 

[stoN_Cold]

I think your pcb is the first edition.

Hmmm, first edition

Regards zeoN_Rider

 

[José Humberto]

Hmmm, first edition

Regards zeoN_Rider

Perhaps your neigbors built a new pcbs with smd and two flat for buffer and LS and my pcb will be old too.
The sound must be fantastic in any case.
Best regards

 

[José Humberto]

Hello friends:
I stell with the problem. I revised all resistor and gain potentiometer and all looks well, but now my multimeter don´t read mA through the jumper 01 and across the jumper 01 is dangerous high. Any sugestion for the next work?
Perhaps change Q1 and/or Q4?

 

[spavleski]

Hello friends:
...but now my multimeter don´t read mA through the jumper 01 and across the jumper 01 is dangerous high....

Hi, please provide more details of this.

 

[Zen Mod]

I wrote - check all surrounding parts ......

whatever - re-read page 4 and page 5 of Cook Book ;

check your parts step by step , according to text

 

[José Humberto]

Goodnight Spavlesky.
Sorry, I wont tell across jumper 02 are more current, 40 mA and the jumper 01 nothing in any position of potentiometers.

 

[Zen Mod]

-are you having approx. 15 Vdc after reg ?
-what's voltage across VR1 ?
- is LED1 lit ?

 

[spavleski]

That's not good. Power it off, and do as Zen said - re-read cookbook .

http://dl.dropbox.com/u/20665608/PSM LS Cook Book.pdf

 

[José Humberto]

-are you having approx. 15 Vdc after reg ?
-what's voltage across VR1 ?
- is LED1 lit ?

Yes I have around 17v. The led shine well. In Q3 2,3V . Across VR1 don´t remember now. I´ll see tomorrow and read again the cook book.
Best regards