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enito

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  1. Hi, Finally today i rechecked i cleaned some contacts in the back of the board and ...WORKS!!! now i get clean sound! Thx for your help and tips . Regards!
  2. Finally i get in my garbage hehe some Nps capacitors. I installed, move the area sound to the RF zone, but same result noise.. Only in this area i get more volumen. Regards!
  3. Hi, question .. I start to replace capacitor but i found a area without polarity, this ones ar NP capacitor. Can replace this ones with polarized caps with same or better UF and V? Thx!! C100, C102 and C103
  4. Hi there, i replaced the 4 transistors and some caps but the noise continue 😕 Regards and thx for reading and reply
  5. Perfect thx for the aclaration, i try to replace all 3 2N3906 . Regards!
  6. Sound good, i thinked the transistor is the 3 ones 2N3906 near of the area of sound. But you mention germanium style, i think i a bit confused .. Regards!
  7. Yes, im sure the speaker of monitor is good but i tested with another direct speaker..Same effect noise. I attach a video, Regards! IMG_4100.MOV
  8. The floating cable from sophia card is only a test cable for the first try for connect audio from there to pin1 of db9 and rca to monitor, but this one is disconnected.
  9. Hi , for doing a clean test i removed sophia card, and the trouble still continue. Noise continue, the cable distribution to rca is red to ground (case of rca plug) and blue to + (pig of rca). Regards!
  10. Hi there, i attach some photos hope the quality is good and clear. I replaced one cap look a bit badly, but the noise continue. thx !!!
  11. Sound good replacing caps , but Wich one can be interfered with sound ? I try too soon uninstall Sophia and try . Thx for the tips
  12. Hi, yes is a NTSC USA 600XL, and i tested with two ones psu. One Atari and other "modern" one, same effect. Regards!
  13. Hi , the red one is using to ground , i use multimeter and not contacting anything more. The blue one is + , i tested with multimeter to rca connector and all is fine. Ground to Ground and + to +, Regards
  14. Hi thx for reply, but i soldered a better cable direct for test and same effect of noises..I attach a video, regards! IMG_4076.MOV
  15. Yep all correct in the right way , regards
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