Tgsl problem help.

[Qiaozhi]

Boa noite, obrigado a todos, hoje recebi o novo cd4024 e lf353, amigo Nandor, entendo que tentarei verificar essa limpeza e os fios do potenci?metro, tamb?m vou verificar o pino 12 de 4024.
Obrigado a todos por sua ajuda e prezado 007.

[CITA??O = waltr; 265764] Sim, todas as medi??es com O'scope. O pino U101 12 deve ter uma forma de onda quadrada na metade da frequ?ncia do oscilador TX.

Eu uso o esquema TGSL EDU como no TGSL_101.pdf para designadores de refer?ncia (U101, tr7, etc). Tr7 e 8 s?o Q4 e 5 no esquema que voc? postou.
Observe tamb?m que os osciladores TX s?o diferentes na vers?o EDU do esquema que voc? publicou. Qual voc? usou ??

Com a base de tempo do escopo em 200usec / div, isso significa que existem 8,7 ciclos em 2msec, ou seja, 4,35kHz. A frequ?ncia deve ser 14,5 kHz.
Verifique novamente. [/ QUOTE]


Boa noite Waltr, verifiquei o pino 12 do u100, prendi a imagem com 5v / d & 20uS e no pino 6 do u100 com 5V / d & 20uS, como na imagem.
Thanks for listening.

[ATTACH]49321[/ATTACH][ATTACH]49322[/ATTACH][ATTACH]49323[/ATTACH]
Thanks for listening

[QUOTE = Nandor; 265783] A fonte de tens?o negativa ? muito importante; se voc? acertar, deve obter cerca de -6,5 volts.
Sob -6 volts, ele n?o funcionar? corretamente!

https://i.imgur.com/jFfSWvJ.jpg

Pierce Brosnan est? de olho em voc? !!! [/ OR?AMENTO]

Nandor, troquei todos os transistores, verifiquei todos os PNP e NPN em suas posi??es corretas, troquei os capacitores de 220uf do circuito no bloco 3 e nada mudou.
Uma d?vida o -5v, s? ocorre com o campo nulo?
Eu tenho no primeiro diodo como na imagem -6.42v, mas no segundo eu n?o tenho voltagem alguma.
Vou consertar os fios dos potenci?metros Nandor.

Na imagem u100u101, os dois canais do oscilosc?pio foram medidos a 5V / d e 20uS / d.
A imagem u1017 est? no pino 7 do u101, medido com (.5V) / d & 20uS / d, porque eu n?o poderia faz?-lo com .1V / d & 20us, como no arquivo Tgsl101.

Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

[ranis]

Nandor, I changed all the transistors, I checked all the PNP and NPN in their correct positions, I changed the 220uf capacitors of the circuit in block 3 and nothing changed.
A doubt the -5v, s? occurs with the null field?
I have in the first diode as in the image -6.42v, but in the second I have no voltage.
I'm going to fix the wires in the Nandor pots.

In the u100u101 image, the two oscilloscope channels were measured at 5V / d and 20uS / d.
Is the u1017 image? on pin 7 of the u101, measured with (.5V) / d & 20uS / d, because I couldn't do it with .1V / d & 20us, as in the Tgsl101 file.

[ranis]

Thanks for the help, I did it in English, but the page was translated and posted inverted, I was unable to edit or delete it, find out again for the error.

[ranis]

Good night Waltr, I checked the pin 12 of the u100, used it in the configuration of this pin as in the image with 5v / d & 20uS and in pin 6 of the u100 with 5V / d & 20uS, as in the image.
Thanks for listening.
https://imgur.com/a/M9KCZTF
https://imgur.com/Znn2FW9

[kt315]

If you dont have -5v?
1. Check for the frequency on 12.pin 4024?should be 7.2 khz nearly.
2.check for 2 diodes near 220uf capacitors ,shoul get damaged not working well,you should have -5v at this diodes 1n4148 near 2n2222 and 2n2907,also if you have -5v there then test lf 353 ouyputs if its works.
If you have -3v at previous doides then check for them also check 2n2222 and the 220uf capacitanses

i wrote billions times guys. THIS SCHEMATIC WITHOUT TX COIL DOES NOT CREATE NEGATIVE VOLTAGE.

[ranis]

Where it is written friend, thank you.

[Nandor]

Hi Ranis

-6.42V is very good! Other 1N4148 diode is ground! Square wave looks very nice and clean "muito bom"

Boa sorte