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What is the value of transistor in peavey cs1400

Transisitor melted due to short circuit

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Go to Peavey's website

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Posted on Aug 21, 2009


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Hello good morning i have a peavey 2600 power amplifier, each time i try to turn on the amplifier the breaker switch flies what could cause that to happen

A serious power drain caused by a damaged mains transformer, short circuit power supply, shorted output transistors or a leak to earth taking the earth treip out.

Mar 22, 2018 | Peavey Music

2 Answers

Peavey XRD 680 wont power up

Fuses blow because of an overload. Generally caused by a short circuit transistor(s) in the power amp section. Easy to spot with an ohm meter it will be like you have touched the test probes together!

Feb 24, 2013 | Peavey Audio Players & Recorders

1 Answer

Cant shut off my craig with remote or by buttons on tv

If the set works well then the fault is the standby shut off circuit. ou need to trace the processor standby out which leads to a transistor that switches ON/OFF on request from the processor. If there is data output but the transistor does not switch there can be short or leakage within. Replace and test the bias of the transisitor. If not the processor can also be the suspect. Your voltage check on the processor output will confirm

Oct 27, 2011 | Craig CLC501 15 in. TV

1 Answer

Sony kv32fq70 led blinking 2 times

It is due to the self fault diagnosis function built in with every latest Sony sets. According to the faults, and section, number of blinks will deffer in numbers. In your set, two blinks indicates that there is some short circuit occured due to some component faults inside the circuit board of your TV. This fault is calle [OCP], Over Current Protection.
It may be sometimes due to the fault of shorted LOT [Line Output Transformer], or its driver transistor has a short between its collector to emitter leads, or any capacitor shortage, or any kind of short, which causes heavy current flow from the regulated power supply section of your TV.
You just start with the horizontal output transistor stated above. It can be located very near to the LOT. usually screwed onto a metal plate, to radiate heat from it while it works. You just resolder it out from the board and check with multimeter, preferably an analogue one, and measure its collector to emitter resistance, both forward and in reverse mode. If it has a short you will get almost full deflection in the multimter movement. If it is so, you have to suspect the LOT said above too, because horizontal output transistor failure indicates some LOT trouble also.
If so just replace the transistor with same type and number, and switch on the tv just for a short period, say 3 or 4 seconds, and feel the temperature of the replaced transistor with your bare hand, after switch-off the set by unpluging from AC mains outlet. If it overheats, there is some overload, and it is mainly due to the above said LOT. There is an other chance too for this fault. That is deflection yokes' winding short. It is very rare, 1/1000 may occur. Normally an LOT short is found in most cases. If the transitor overheats as said earler, replace the LOT also.
Without the transitor, you just connect a filament bulb of 220v 100W or so, between the main positve rail of the DC supply voltage 130vDC. If the bulb glows constantly, you can make sure that the short is due to lot fault.
An other posibility is shorted secondary filter capacitor and retifier diode. The 130VDC is derived from the secondary side of the SMPS transformer at the power regulator section. There is a rectifier diode and an electrolytic fulter capacitor, normally come to the value of 220MFD 160V or so. If the capacitor gets shorted, it will give a heavy load as stated earlier. Check these components also. OK.

Nov 20, 2010 | Sony FD Trinitron WEGA KV-32FQ70 32" TV

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Go to Peavey's website

You may find what you are looking for here if not you may have to call them.

Jun 30, 2009 | Peavey Pv 2600 Power Amplifier

1 Answer

Peavey TNT 160 has no response from both inputs, only preamp in

In my experience fuses rarely blow due to age! I suspect that whatever the guy said the problem was it was really a faulty transistors or IC in the power amp board.
You can check transistors with an Ohm meter in circuit to some extent. (the ones with a scale and needle are best for this) Look for a short between the terminals of each power transistor on the heat sink first. If any transistor sends the meter full across (both ways) you have found the fault.

Apr 24, 2009 | Peavey VTB1 1-Channel Amplifier

1 Answer

I have an audiobahn A8000t amp with the protection light on

There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause. If the fuse protecting the amp is too large, if the protection circuit doesn't respond quickly enough or if the power supply is poorly designed, the power supply transistors may fail. If you see a lot of black soot on the power supply transistors (near the power transformer), the power supply transistors have failed. Soot on the board doesn't necessarily mean the transistors have failed. Sometimes, technicians don't clean up the mess from a previous failure.
In general, when a transistor fails, it will either short (common for output AND power supply transistors) or open (common for power supply transistors). Transistors act like valves. They control the current flowing through a circuit. A shorted transistor acts like a valve that's stuck open (passing too much current). In the case of an output transistor, the shorted transistors tries to deliver the full rail voltage to the speaker output terminal. If you've ever seen a damaged amp that pushed or pulled the speaker cone to its limits when the amp powered up (common on some Rockford amplifiers), that was almost certainly due to a shorted output transistor. When checking transistors, you most commonly look for shorted connections inside the transistor. You do this by using a multimeter to look for low resistance connections between the transistor's terminals.
I used the terms short and open on the previous paragraph. A short (short circuit) is a path through which current flows that should not be there. An open (open circuit) is a break in the circuit.

Dec 30, 2008 | AudioBahn A8000T Car Audio Amplifier

1 Answer

HT-DB120 - PROTECTION due to shorted output stage

i have the same problem. was playing a cd for my son for about 20 mins. CD started skipping then froze up and shut off. When trying to power on the word "PROTECTION" comes on then shuts right off. Is there any solution for this problem? My husband bought this when it first came out over 6 years ago at $400. I bearly even use it. It's a waste to throw away. Please someone help. Thanks.

Feb 24, 2007 | Samsung HT-DB120 System

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