Someone will have the amplifier diagram of the goalkeeper Tacyc
Hi Ricardo (namesake) in this case the front receives the positive and the negative of the source that is 20 V DC and also 23V AC for the buzzer, the metal plate of the front is isolated and on the back of the speaker has a printed circuit board with the amplifier, which in addition to the two speaker connections receives positive and negative and the audio input from the phone, which has a microphone microphone capsule, the source is in the phone and as it says, provides 20 V DC and 23 V AC through a 220 V transformer to a secondary with a midpoint of 15 + 15V and 23
From Tasyc I never saw amplifiers in the front ... neither phones with a source included; everyone I know was integrated into the source that even had a potentiometer. It may be an adapted amplifier, but if burned it replaces a new one, in that case there would be no inconvenience. Porterito, Netyer and CPE have very good amplifiers. regards
Most of the amplifiers have four wires (red, black, yellow and white) positive red, negative black both of the source and white transmitter line and yellow to speaker, the only thing that changes is knowing that the front (common) is powered front) If the speaker and microphone have positive (most) so you ask and if on the contrary the common of the front is negative you must specify it so that they give you the correct one. I think there is only one brand that uses three-wire amplifiers but the front is powered differently. regards
Hi Ricardo It is very difficult for the amplifier to burn, unless there is a short circuit in the transmitter line, which would cause the amplifier to heat until burning. You always have to check that the line that transmits from the phone has no current (before the amplifier) I tell you this because it is a common mistake and few take into account. The other parameters of the source are normal for an electric door entry system. And it would be very useful if you upload a photo of the phone with its built-in source. It would be the first time I see her. THANKS
