Analysis this schematic

[mohandes]

I think you should set the scope on DC coupling and Vp-p but I am not familiar with your scope's controls.

Problem is, do you know what voltages you will be setting your test points to? (Because, I don't.)

read this:

02-26-2010, 07:38 AM #124
georgi.g.zhelev
Guru


Join DateAug 2009LocationBGPosts315


PULS STAR-G

HI, ALEXIMUS!Hi, tuning is done in the absence of metal in the area of the coil!
1.RV7, RV8 obtain TP3 = 0volt. dual beam oscilloscope after the tone
the output of U6a, b. (TP1,TP2)
2. ZERO push and relax, RV11; indicator "discrimination." 0!
3.RV9 ;TP5 around 0.5 .... 06v (maximum sensitivity and stability)
RV11, replaced the potentiometer (see photo PULS STAR-G front panel) is a indikator RV11.
SUCCESS!



03-02-2010, 08:49 AM #144
georgi.g.zhelev
Guru


Join DateAug 2009LocationBGPosts315


PULS STAR-G

Hi,ALEXIS!1. Potentiometer RV3 (DELAY) put in a position of maximum sensitivity and stable operation of the audio channel. (do not touch more)
2.RV5 discrimination> See ostsilograma scheme. (Q6 colector) fixed and not touch more!
3.RV7, RV8> putting U7A (TR3) 0V. more .. do not touch!
4 .. Potetsiometar RV11 >discrimination indicator to zero.
5 .. Push and relax ZERO, RV11 ... indicator of discrimination> 0 <!
UNDER INDICATOR ,POTENCIOMETER RV11! (NO RV5,RV10)

IMPORTANT! BEFORE SETUP, OFF TV!! (ALL TV> OFF)
CHANNEL discrimination is very sensitive! G.L.!

[porkluvr]

ok
now i do that,
but tomorrow i set scope on Vp-p or Vmax?or i better say when i want adjustment by scope TP points ,if scope on Vp-p correct?
thanks

I think you should set the scope on DC coupling and Vp-p but I am not familiar with your scope's controls.

Problem is, do you know what voltages you will be setting your test points to? (Because, I don't.)

[mohandes]

ok
now i do that,
but tomorrow i set scope on Vp-p or Vmax?or i better say when i want adjustment by scope TP points ,if scope on Vp-p correct?
thanks

[porkluvr]

You posted two slightly different pictures. I suppose the first one was a mistake. (You can edit your posts for at least 1/2 hour after you make the post, if you make mistakes)

That is where the positive lead goes, but where you put the ground lead in the first picture is wrong.

red ok

[mohandes]

I do not know where the test points are, so would you save me some time by showing me?!

look the figure,

[mohandes]

ok but can not edit

my means first picture ,blue wire ok or red?
you say :The ground wire does not need to be connected directly to pin-3, it could go to the top of D3, D4, or best, to the bottom of R18, since they are all connected together. AND I THINK RED WIRE is ok!

[porkluvr]

hi
this picture for TP points,you careful not adjustment their point

first for TP5,
second TP1,2(yellow1,blue2)
third Tp4,3(yllow TP4,blue TP3)

I do not know where the test points are, so would you save me some time by showing me?!

[porkluvr]

You posted two slightly different pictures. I suppose the first one was a mistake. (You can edit your posts for at least 1/2 hour after you make the post, if you make mistakes)

That is where the positive lead goes, but where you put the ground lead in the first picture is wrong.

[mohandes]

this is for my guru porkluvr

[mohandes]

first picture for TP6 when i put the pot on max
second for TP6 and pin9 4066

[mohandes]

hi
this picture for TP points,you careful not adjustment their point

first for TP5,
second TP1,2(yellow1,blue2)
third Tp4,3(yllow TP4,blue TP3)

[mohandes]

Naw, that was just me being hard on you and I apologize. I can't expect you to understand that 'shorthand'. I'm used to it, but you're not. I'm hungry and often grumpy early in the day.

And you're right, I should have said to check voltages on U5.

I'm still trying to analyze your pictures. Something doesn't look right but I can't say what.

georgi, what is going on with his last two pictures, can you tell?

hi
i have TP point picture (without the adjustment) ,if need i put them
and for waves x,y,z do you know correct waves?ARE THEY wrong!!!!
merci

[porkluvr]

i think Your means U5,yes it is ok,
i take photo that you say,now i put it ,please check
sorry me man for my bad english

Naw, that was just me being hard on you and I apologize. I can't expect you to understand that 'shorthand'. I'm used to it, but you're not. I'm hungry and often grumpy early in the day.

And you're right, I should have said to check voltages on U5.

I'm still trying to analyze your pictures. Something doesn't look right but I can't say what.

georgi, what is going on with his last two pictures, can you tell?

[mohandes]

first pin4,9(yellow for pin4,belu for 9)
second pin15,10(yellow 15,blue10)
third pin14,11(yellow14,blue11)
and finall picture for pin3,6(yellow3,blue6)

[mohandes]

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

i think Your means U5,yes it is ok,
i take photo that you say,now i put it ,please check
sorry me man for my bad english