Fiser cz 5

[Orbit]

I have to repair Fiser cz5 and someone tried to change some transistors




so that the Q 2 and Q4 and Q11 changedwith some replacements ,but without results question which are original Q2 ,Q4 and Q11 transistors Fiser CZ5 ?

[Skippy]

On the circuit diagram I have, Q2 = IRFD9120, Q4 = IRFD120, Q11 = VP0104

[Orbit]

Q2 and Q4 and Q11 in the packageTO-92 ???

[kt315]

Q 2 and Q4 and Q11 changedwith some replacements --- what there replacements you see?

[Orbit]

you do not understand ,I do not know who the original transistors !




for me has arrived with already Replaced transistors and that Q 2 = 2N5088 Q4 = bc 547 and Q11=bc517 ! I know it's not even replacement I had a long time ago Fiser CZ5 but we did not crossed my mind somewhere to write transistore which are !These certainly are not replacements !

[WM6]

Koji majstor je to menjao?

Maybe you can help yourself using this scheme:

http://docdro.id/1152s

http://docdro.id/1152j

http://docdro.id/1151u

..

[Skippy]

Orbit, your photos are terrible. Hold the camera further away from the circuit, maybe 25cm+ away. Then crop the picture to get the part you need.

[Skippy]

OK, now I am confused. I made an error, I told you Q2,Q4 and Q1, not Q11. These are the power mosfets that drive the transmit coil.
Q11 is actually part of the pre-amp. Are you sure you meant Q11, and not Q1? Or did you mean Q12,Q14,Q11??

[Orbit]

Zdravo VM6 ,neki iz Macve neznam tacno ko poslat mi je svi trimeri rastelovani i na tim mestima su zamenjeni ti tranzistori, ja sam davno imao fisera ali nisam zapisivao koji su tranzistori u pitanju !


Hello VM6, some of Macve do not know exactly who sent me all trimmers incorrectly adjustedand in those places were replaced by these transistors, I have long had Fiser but I'm not writing that transistors are at stake!

[Orbit]

OK, now I am confused. I made an error, I told you Q2,Q4 and Q1, not Q11. These are the power mosfets that drive the transmit coil.
Q11 is actually part of the pre-amp. Are you sure you meant Q11, and not Q1? Or did you mean Q12,Q14,Q11??

I think it is Q11 preamplifiers in tonal work and Q2 and Q4 !

[Skippy]

Q11 is shown on my circuit diagram as a 2N4401. This is the same as Q10. It is a general purpose transistor, so if you replace with some other common transistor, the circuit will function ......but: 2N4401 is low-noise, I think, so the detector may not function as well as intended. It is best to replace with the same type if you can obtain one.

[Orbit]

Thank you Skippy !

[Orbit]

VM6 Hvala ti puno na pomoci oko seme svako dobro !!!!