Speaker Protection

                                                       The workings of speaker protector


Function
1. Speaker serves to secure speaker protector speaker damage (burning of the speaker coil) resulting DC voltage output amplifier issued by an Amplifier damaged.
2. In addition to functioning as a protector against voltage DC It also serves as a delay or a delay (liaison between the power amplifier and speakers) it is intended to avoid the instantaneous flow rate at the time of the first power amplifier in turn causes the sound of "DUK" the Speaker that could cause damage the speakers.

How it works:

1. If the amplifier works Normal (output Amplifier AC output)
Amplifier output is passed through R1 and R2 which serves as the voltage drop of the output amplifier, then output will ditera by C1 and C2 which serves to distinguish between the output voltage of the amplifier DC or AC. When working Normal Amplifier Amplifier output will issue the AC voltage, AC voltage is the C1 and C2 will be passed to the gound (-), so that on D1, D2, D3 and D4 are arranged in a bridge is not the case this causes a voltage difference TR 1 becomes off because of Vb and VE = 0.
At the same time, also from the supply voltage is passed through a speaker protector and filtered by C7 D7, voltage stabilization by R14 and Dz, C6 and TR 7. This voltage is passed on by R5 and R6 serve as a voltage divider bias on TR 2, the capacitor C3 dikople R6, so the bias TR 2 delayed (delay) for RC seconds.
When C3 loaded and biased TR2 has been reached then the TR 2 and TR 3 will On. So that the Relay will work, so the output of the amplifier will be connected to the speakers.
TR4, TR5 and Tr 6 serves as a peak output level, at the level of a small amplifier and the TR4 will turn Led On 1 (green), and this time so TR6 TR5 On Off so that the LED will be Off 2 (red). At the amplifier output level (peak) then TR4 (1 green LED will be off) and TR5 and TR6 going off On that Led 2 on (a red On).
2. At the time of issuing Amplifier DC voltage (+)
Dc voltage is passed + R1 and blocking by C1 and C2, so that TR1 can be biased through D3 and On TR1, TR2 and TR3 so Off and Off Relay and amplifier are not connected to speakers.
3. At the time of issuing Amplifier Voltage DC (-)
Voltage DC - will be passed through R2 and will be in blocking C1 and C2, so that TR1 can bias R4 and D4 as emitter gets negative bias of D1, 1 on TR and TR2 and TR3 offsehingga Off relay.




Question:
1. Functions C1 and C2?
2. The function of diode D1 - D4?
3. Function Led green?
4. Function Led red?
5. R6 and C3 functions?






Answer:
1. C1 and C2 as DC and AC voltage sensor, Current Output voltage DC it will be in blocking voltage and AC output voltage when the voltage is in loloskan (by pass) to the ground.
2. D1 - D4 as Brige sensor to output DC + or -
3. Green LED serves as an indicator of a low level of peak output Amplifier
4. Red LED indicator serves as a peak level of output Amplifier
5. Function R6 and C3 serves as a delay (delay time) bias on Tr 2 What causes delays in relay On
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