Question about Samson Servo 170 Amplifier

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Samson Servo 170 protection circuit problem!

Hi the protection has kicked in on my servo 170, I believe a diode or 2 and a couple of resistors have blown which I can replace but I want to know if theres an easy way of testing the circuit with a meter without having to pull out transistors etc.... I have no schematic also!

Any ideas on a noisy transformer also????

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  • The Horse
    The Horse Aug 14, 2008

    Ha-ha yes I have to admit in my wisdom testing another amplifier in this jungle I killed it!



    I know roughly which bits need replacing but sadly sourcing similar spec'd parts is difficult!



    The noisy transformer thing doesn't really affect me - I came across a samson amp recently which suffered this problem - That's a very interesting response - I will research that more,

    Thanks



    I'll keep you posted!

  • The Horse
    The Horse Aug 14, 2008

    Ok Noisy transformer = Loose core

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My friend resistors and diodes don't just go off your circuit without a real problem. those parts gave up because of shortage on your power section, i suggest that you check your power transistros first along with the diodes and resistors.

noisy transformers... hmmmm why is that making sound? the solution there is to dip the power transformer to a thick shellac varnish let it there for let's say an hour then let it dry for a day. then place it back in your unit and see if still sounds

Posted on Aug 13, 2008

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Posted on Jan 02, 2017

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1 Answer

Hello, my Samson Servo 200 has a problem, when I push the Power-ON button, the Protection Modus don' t started.


You have lost a circuit. this is a problem that you can not fix yourself.

Check to see where the nearest "AUTHORIZED" service center is.

Do NOT take it to Joe Schmoe stereo repair!

Use ONLY an "AUTHORIZED" repair center!

Going anywhere else could result in YOU replacing your unit!

May 17, 2014 | Samson Servo 200 Amplifier

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Blown Samson servo 170


Hi,
The amplifier have problem with the out put drive section. Repairing of such an amplifier should be done by a skilled person. there should be need of repacing so many components if the out put driver transistor is short. If you make any mistake the components you change will also go in to fire.

Ajin

Mar 31, 2012 | Samson Servo 170 Amplifier

1 Answer

No sound coming with protection light on


It's either overheated or you may have faulty speaker wiring or a shorted speaker. These directions come from a Samson servo 120a but the theory is the same.

The following conditions will cause the Protection LED to go on:

Initial power-up: For approximately five seconds after initial power-up, the relay

speaker connection circuitry is deactivated and the speaker output is muted. If everything is operating normally, you will hear an audible click at the conclusion of this brief period, as the circuitry is activated and the Servo 120a begins delivering signal to connected speakers (at which point the Speaker LED will light if the Speaker on/off switch is in its "in" position). It is normal for the Protection LED to fade gradually after the amplifier is powered off.

Overheating: A temperature sensing device in the Servo 120a will cause the relay speaker connection circuitry to be activated (and the Protection LED to go on) whenever the operating temperature of the unit rises above a safe level. To guard against this problem, make sure the Servo 120a receives adequate ventilation on all sides ; in extreme environmental conditions, you may also

want to consider the use of cooling fans.

Severe overcurrent conditions: This occurs whenever the signal being output

from the Servo 120a rises to a level above 20% THD (Total Harmonic Distortion).

Shorted speaker cables: This will occur if, due to faulty wiring, the hot and ground signals being output by the Servo 120a short to one another.

Output impedance drops below 2 ohms: This can occur if the Servo 120a is connected to inappropriate speaker systems (see the "Setting Up and Using the Servo 120a" section in this manual for more information).

DC voltage detected at speaker output: The most likely cause of this is an internal failure. In general, any time the Protection LED lights up (other than during the approximately five seconds following initial power-up), there is reason to be concerned. If this occurs, turn the Servo 120a off immediately and carefully check all wiring and external devices in order to locate and correct the condition that caused the LED to light up in the first place.

Dec 27, 2010 | Samson Servo 170 Amplifier

1 Answer

Samson servo 300 right channel low output power protection on.Left channel ok.


Hi...

This amp will need to be serviced

Check on the web for someone who does audio/stereo repair in your area

Jan 22, 2010 | Samson Servo 300 2-Channel Amplifier

1 Answer

When i turn my servo 170 on the protection light cums on so does the left channel clip light


Disconnect your speakers and see if the same thing happens. If it does not, then you have a problem with your speakers - possibly too many wired in parallel. If the amp. still shuts down, then it'll have to go in for repair.

Jul 23, 2009 | Samson Servo 170 Amplifier

1 Answer

Hi when i turn on my servo 170 my protection lite stays on


One of the channels in the amp is bad. That channel will need tobe replaced. You may need to take it to a repair shop.

Nov 12, 2008 | Samson Servo 170 Amplifier

1 Answer

Samson Servo 170 Amplifier


check see if youy have some coving the vent or the speak connect right

Dec 05, 2007 | Samson Servo 170 Amplifier

1 Answer

Samson Servo 170 - 1 dodgy channel


http://www.soundonsound.com/forum/showflat.php?Cat=&Number=403253&Main=351397

Dec 02, 2007 | Samson Servo 170 Amplifier

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