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I have a cougar c.600.2 1200Watt 2channel mosfet amplifier that was workin 4 about 30mins than it stoped and now wer it had a green pwr/prt light it is now red and doing nothing can you help me plz n thank you

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  • Anonymous Apr 21, 2009

    i have the same problem

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Receiver turns off as soon as it is turned on


• check for shorted power MOSFET transistor s on the main amplifier

• have them remove in pair, if it powers up

you have succeeded finding the cause, but

• recheck again for possible additional components.


these may take some time,

and i hope youll make it.

Sep 12, 2012 | JVC RX-D301S Receiver

1 Answer

No sound from tuner all other inputs OK


It sounds as though one or more of the MOSFET's failed. MOSFET's are metal-oxide semiconductor field effect transistors. In layman's terms the Ic responsible for amplifying the sound produced in a given circuit.
These are not difficult to replace for a qualified shop and I think you would be surprised at how inexpensive it actually is - for a qualified shop...
My advice send it in and have it estimated and repaired. You might even research the net and send it off to have it done... Stereo repair is a very competitive market and it could save you some real bucks..
Hope this helps
Bill

Nov 14, 2007 | Kenwood VR-407 Receiver

1 Answer

Back surround l and r not working and light is red? Everything plugged in correctly???


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.

Thank you for using Fixya

Sep 03, 2011 | Audio & Video Receivers

1 Answer

Hello i have a samsung AH64-04012C home cinema. Now it gives HELLO PROTECT can you help me with this problem?


Protect mode on any amplifier is a safeguard to stop too much current from being draw by either the power supply or by the power amplifier. Please disconnect all speaker outputs and turn the unit back on. If the protection does not turn on you may have either a shorted speaker or damaged speaker wire that is causing the load on the power amp to be too low which causes much more current to be drawn from the power supply. If the power supply itself is bad you could be in some trouble if you cannot troubleshoot down to board level. Most power supplies in home theaters today are switching supplies. They employ what is called a PWM or pulse width modulation scheme. This supply compared to that of a standard transformer and rectifier setup is much more efficient but at the same time is much more complicated. The AC input voltage switched on and off by a given duty cycle generated from a frequency reference inside the PWM. The power mosfets are what supply the high DC current to the power amplifier. If one of these MOSFETs is damaged it will also give you a protection error.

Aug 09, 2011 | Audio & Video Receivers

2 Answers

Yamaha RX-V995 receiver turns on & then powers off 2 seconds late


I suggest you run self diag.  press [FM/AM] key + [Input mode] key and press the [power/standby] switch.

ps prt = power supply problem
dc prt = shorted output or leakly cap in channel
tmp prt means to hot on heatsink

you'll likely have to measure the resistances of the output FETs to find a short, 

Jan 02, 2009 | Yamaha RX-V995 Receiver

1 Answer

My sub and amp has stoped working and the power light on the amp has tornd red instead ov green i have changed all the fuses but still nothing..


you have a light, so it's getting power, check your ground wire, make sure it's secure, the slightest movement or looseness of a ground wire can keep it from working. (I may be wrong, but it's worth a shot if you haven't tried it.)

Nov 25, 2008 | Audio & Video Receivers

2 Answers

Sharp tv 2004 model


Program TV Code
1. Turn on the TV.
2. Locate the 5-digit code for your TV.
3. Slide the MODE switch to the TV position.
4. Press and hold the MUTE and SELECT keys at the same time until the green light under the TV position flashes twice, then release both keys.
5. Using the number keys enter the 5-digit code for your brand of TV. If performed correctly, the green light under TV flashed twice.
6. Aim the remote at your TV and press the PWR key once. Your TV should turn off. If it does not turn off, repeat steps 3 and 4, trying each code for your brand until you find the correct code.
7. Slide the MODE switch to the DIRECTV position. Press TV POWER. Your TV should turn on.

Program DVD, VCR, Stereo Receiver, and Stereo Amplifier Code
The AV1 and AV2 switch positions can be setup to control a VCR, DVD, STEREO, second DIRECTV Receiver or second

1. Turn on the component you wish to control (e.g. your DVD Player).
2. Locate the 5-digit code for your component.
3. Slide the MODE switch to the AV1 (or AV2) position.
4. Press and hold the MUTE and SELECT keys at the same time until the green light under AV1 (or AV2) flashes twice, then release both keys.
5. Using the NUMBER keys, enter the 5-digit code for the brand of component being set up. If performed correctly, the green light under the selected position flashes twice.
6. Aim the remote at your component and press the PWR key once. The component should turn off; if it does not, repeat steps 3 and 4, trying each code for your brand until you find the correct code.
7. Repeat steps 1 through 6 to set up a new component under AV2 (or AV1).

Unable to Find Correct Code
If you were unable to find the code for your brand of TV or component, you can try a code search. This process may take up to 30 minutes.
1. Turn on the TV or component. Insert a tape or disk if applicable.
2. Slide the MODE switch to the TV, AV1 or AV2 position, as desired.
3. Press and hold the MUTE and SELECT keys at the same time until the green light under the selected switch position flashes twice, then release both keys.
4. Enter 9-9-1 followed by one of the following four digits:
Satellite - 0
TV - 1
VCR/DVD - 2
Stereo Receiver/Stereo Amplifier - 3
5. Press PWR, or other functions (e.g. PLAY for VCR) you want to use.
6. Point the remote at the TV or component and press CHAN+. Repeatedly press CHAN+ until the TV or component turns off.
NOTE: Every time CHAN+ is pressed the remote advances to the next code and power is transmitted to the component.
7. Use the CHAN- key to step back a code.
8. When the TV or component turns off, stop pressing the CHAN+ key. Then, press and release the SELECT key.
NOTE: If the light flashes 3 times before the TV or component responds, you've cycled through all codes and the code you need is not available. You must use the remote that came with your TV or component.

Verifying the Codes
Once you have set up the DIRECTV Universal Remote Control using the above steps, use the following instructions to find out the 5-digit code to which your component responded:
1. Slide the MODE switch to the appropriate position.
2. Press and hold the MUTE and SELECT keys at the same time until the green light under the selected switch position flashes twice, then release both keys.
3. Enter 9-9-0. (The green light under the selected switch position flashes twice.)
4. To view the first digit in the code, Press and release then number 1 key. Wait three seconds, and count the number of times the green light flashes. Write this number down.
5. Repeat step 4 four more times for the remaining digits; i.e., press number 2 for the second digit, 3 for the third digit, 4 for the fourth digit and 5 for the final digit.\


Depending on how you set up your remote, the VOL and MUTE may control the volume only on your TV, regardless of the position of the MODE switch. This remote can be set up so that the VOL and MUTE keys work only with the component selected by the MODE switch. To enable this feature, perform the following steps:
1. Press and hold the MUTE and SELECT keys until the green light under the DIRECTV position flashes twice, then release both keys.
2. Using the number keys, enter 9-9-3. (The green light will flash twice after the 3.)
3. Press and release the VOL+ key. (The green light flashes 4 times.)
Now the VOL and MUTE keys will work only for the component selected by the MODE switch position.

To Lock Volume to AV1, AV2 or TV
1. Slide the MODE switch to the AV1, AV2 or TV position to lock the volume.
2. Press and hold the MUTE and SELECT keys until the green light under the selected switch flashes twice and release both keys.
3. Using the number keys, enter 9-9-3. (The green light flashes twice.)
4. Press and release the SELECT key. (The green light flashes twice.)

Jan 26, 2008 | Audio & Video Receivers

1 Answer

VSX-D704S


Have the speakers disconnected and turn on unit. If it still shuts down due to thermal protection the amplifier IC pack is damaged. Amplifier IC is tied to one side of the power supply by design. The left channel is probably shorted at the MOSFET on the pack. Nothing you can do but have it serviced. This is a common PIONEER failure.

Apr 08, 2007 | Pioneer VSX-D704S Receiver

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