Analysis this schematic

[Davor]

hi
but i change my pcb like georgi(now have not res 68k)
davor a simple question,should i adjustment TP points by scope or multimeter?

Scope is always better.

[porkluvr]

Hi
ok i measure by 2 channel forins 11, 14,pins 10, 15,pins 9, 4
i check U4(ne5534 and correct for pin 7=8volt and pin4=-7volt)
check third pcb all correct.
but i can not found U16????

dont need i measure by scope some output of third pcb,if need where?
thanks

Well, could you find U4 pin-16, because that is what I wanted. IS it that hard to understand?

Reread my post.
What I was trying to get you to do is put ch1 scope probe on u4 "A" input (U4-11, that's U4 pin-11) and ch2 probe on "X" output (U4-14).
Do the same for B and Y
Do the same for C and Z.

Those DUAL TRACE pictures could be meaningful, and very much more so, if you will adjust the scope to show us TWO (2) cycles of the signals.

---------------
And then, check with multimeter (or scope is better) and make sure you have +8V on U4 pin-16, and make sure you have -7V on U4-8 ( that's U4 pin-8 ).

I should not have expected you to know it before, but now you know my code. I like to save my fingers from unnecessary typing whenever I can.

[mohandes]

Regarding #158, 4066 is a bilateral switch, so pins 8&9 are interchangeable. Same with pins 3&4.
Offset potentiometers of 10k (RV7,8,9) are originally connected with a single resistor of 22k, which is the same as if each of them is connected with it's own resistor of 68k. The schematic you refer to has 22k resistors in series with 10k potentiometers. It means that in comparison with Georgi's schematic it will be 3 times more coarse, and you'll find good positions on the lower end of potentiometers, not in a middle. However, functionality will be the same. If you find it difficult to adjust, just replace 22k resistors with 68k.

hi
but i change my pcb like georgi(now have not res 68k)
davor a simple question,should i adjustment TP points by scope or multimeter?

[Davor]

Regarding #158, 4066 is a bilateral switch, so pins 8&9 are interchangeable. Same with pins 3&4.
Offset potentiometers of 10k (RV7,8,9) are originally connected with a single resistor of 22k, which is the same as if each of them is connected with it's own resistor of 68k. The schematic you refer to has 22k resistors in series with 10k potentiometers. It means that in comparison with Georgi's schematic it will be 3 times more coarse, and you'll find good positions on the lower end of potentiometers, not in a middle. However, functionality will be the same. If you find it difficult to adjust, just replace 22k resistors with 68k.

[mohandes]

Who can tell anything from looking at a single pulse?
Don't you have a dual trace scope?

On the CD4053, dual trace the following pairs

pins 11, 14

pins 10, 15

pins 9, 4

ch1 probe goes to 11, 10, 9
ch2 probe goes to 14, 15, 4

Show more than a one cycle (pps) on the screen. How about two!

Make sure you have +8 on U4-16 and -7V on U4-8 and no solder bridges between pins or between traces.

Hi
ok i measure by 2 channel forins 11, 14,pins 10, 15,pins 9, 4
i check U4(ne5534 and correct for pin 7=8volt and pin4=-7volt)
check third pcb all correct.
but i can not found U16????

dont need i measure by scope some output of third pcb,if need where?
thanks

[porkluvr]

hi my friend
yes ,if you look number 155 and see second picture ,these are for out put X,Y,Z before i connect to third board.can you Simulation x , y,z if you want?
and for my second pcb iam sure not connection with solder.
please see #158 and say to me your idea about them.i think the problem of hear
thanks.

Who can tell anything from looking at a single pulse?
Don't you have a dual trace scope?

On the CD4053, dual trace the following pairs

pins 11, 14

pins 10, 15

pins 9, 4

ch1 probe goes to 11, 10, 9
ch2 probe goes to 14, 15, 4

Show more than a one cycle (pps) on the screen. How about two!

Make sure you have +8 on U4-16 and -7V on U4-8 and no solder bridges between pins or between traces.

[georgi.g.zhelev]

mohandes , now is ready to only about 15 % of Puls Star -G, OK. How will you get to the end?

[georgi.g.zhelev]

Hi all
i check the alexis schematic by georgi and found more errors(2 errors) but need your Experience to i am sure.i explain in the picture ,please check and say me.
thanks[ATTACH]24692[/ATTACH][ATTACH]24693[/ATTACH]

Shematics are correct !Еrrors are with you ,ОК?Check everything again.

[mohandes]

How it will work without power ? Connect all tl062 to -7and+8 volts ! first picture for Sc and sb , OK!

hi georgi
what is your mean about : How it will work without power ?(my english is bad)

NO body know about #158
thanks

[mohandes]

hi my friend
yes ,if you look number 155 and see second picture ,these are for out put X,Y,Z before i connect to third board.can you Simulation x , y,z if you want?
and for my second pcb iam sure not connection with solder.
please see #158 and say to me your idea about them.i think the problem of hear
thanks.

[porkluvr]

Some of those signals look so alike that I am thinking that you have solder bridge somewhere. If that only occurs when the third board is connected... likely that short is on third board.

[mohandes]

Hi all
i check the alexis schematic by georgi and found more errors(2 errors) but need your Experience to i am sure.i explain in the picture ,please check and say me.
thanks

[georgi.g.zhelev]

ok
i see first error,in alexis shematic dont connect all tl062 to -7and+8 volts ?
what do you think?

How it will work without power ? Connect all tl062 to -7and+8 volts ! first picture for Sc and sb , OK!

[mohandes]

ok
i see first error,in alexis shematic dont connect all tl062 to -7and+8 volts ?
what do you think?

[mohandes]

Hi
mr georgi and porkluvr.finally i solve it in my second board
look at the picture.
first picture for Sc and sb
second for otu pu ,x,y,z(x is yellow and z,y are blue)
finall picture are sequence piture of:x,y,z(when connect third board)
and i think alexis schematic for third part is wrong too,look the georgi schematic!
OK AGAIN I check the both schematics and if you help me thanks.please