Full m/lab SD2000 schematics

[6666]

English?

translates to
Hello

[Andrei]

Sorry ), I have board with pin 4- , pin 8+. So, I want change LT1058S8 to another

[Andrei]

The schematic by Zed shows a SMD lt1057S8 (pin 2- , 6+). If you look at the datasheet for lt1057 the dip package has a different pinout (pin 4- ,8+).

Yes, but have board with LT1057S8

[Qiaozhi]

geia sou file

English?

[μιχας]

geia sou file

[Mechanic]

Then there are errors in Zed's schematic!

No the SMD pinout of the lt1057 is odd and only a handful of other components share the same pinout. Just stick with the 1057, there is nothing to be gained by swapping it out.

Cheers Mick

[waltr]

The schematic by ZED is 100% correct.

The schematic by Zed shows a SMD lt1057S8 (pin 2- , 6+). If you look at the datasheet for lt1057 the dip package has a different pinout (pin 4- ,8+).

Then there are errors in Zed's schematic!

[au1]

The schematic by Zed shows a SMD lt1057S8 (pin 2- , 6+). If you look at the datasheet for lt1057 the dip package has a different pinout (pin 4- ,8+).

[Andrei]

is it possible to replace LT1057 with ad712? did I make the board for standard software (pin 4-, pin 8+), and lt1057 (pin 2-, 6+)

[au1]

What should be the variable resistor TONE ADJUST PRE-SET on the circuit under LM13600

The value isn't critical. I used 100K because I had one.

Do note that it looks like the transistor XTX688 in the -5V is shown backwards. Emiter should point to the lower Voltage.

The schematic by ZED is 100% correct.

[waltr]

Looking at the SD2000 Power supply and regulator page os schematic:
That sound like the correct way to measure the +/-5V PSs.

Are you measuring PS WITHOUT any chip that use the +/- PS installed?

Problem could be in the -5V circuit or you have a short or bad chip somewhere.

Do note that it looks like the transistor XTX688 in the -5V is shown backwards. Emiter should point to the lower Voltage.

[Anis]

It is Very common to have the Battery Positive to be circuit Ground in PI detectors.

"Ground" is a bad term, better if it is named "Common" or even "Zero".

Hi Waltr, thank you for your replay, if I understand,to measure the:
* +/- 5V with multimeter connected to common and (one time to +5V line, one time to -5V)
In this case +5V is ok for all IC, -5V is bad= 0.4V
*measure signal's with scope, same grounded to common and sensor to test points.
m I right?

[Anis]

Hi Andrei, I will upload today, soon when I get home...

[waltr]

Hi genius, finally I ve complete my work on this big project,
First start was with bad result (no sound), so I v started with cheking voltages +5v -5v, here I was a little bit confused with references GRND/GND(=+VB) as below pictures, so please can any one help ��...[ATTACH]48596[/ATTACH][ATTACH]48597[/ATTACH]

It is Very common to have the Battery Positive to be circuit Ground in PI detectors.

"Ground" is a bad term, better if it is named "Common" or even "Zero".

[Andrei]

Hi Anis! Lay out your circuit diagram