linear power 2202IQ amp

scoooby03 · 14th January 2010, 05:48 AM

I got two linear power 2202IQ amps. Both of the amps have turn on relays. One amp turns on about 3-4 seconds after the remote turn on signal is applied. The other one turns on simultaneously when a signal is applied to the remote turn on. Now this particular amp makes a turn on pop. Wich I think is also related to the output section being turn on too early. What are the chances the relay needs to be replaced? Another probable cause I can think of is the current is increased somewhere before the relay and causing it to turn on sooner.

Perry Babin · 14th January 2010, 09:12 AM

There's likely an electrolytic capacitor that's out of tolerance and not delaying the turn-on of the relay. If you can't find it, post a good quality photo of the inside of the amp.

0ldSch00lf00l · 15th January 2010, 04:20 AM

You are preaching to the choir on that one Perry. Dried out caps seemed to be a problem with ALL of the older Linear Power amplifiers I once owned. The first thing I would do is replace ALL the 85 degree electrolytic caps with 105 degree long life caps. That generally solved most of my problems, except for the dang power supply noise making its way into the signal path. Just knowing that oscillating noise was there drove me batty, even though I couldn't hear it driving down the highway!

The second to last and last series of Linear Power amps that I owned, the LP and DPS series, didn't have the noise issues. Unfortunately my experience with the IQ and earlier series of amplifiers was not so great with regards to noise issues and them being finicky.

scoooby03 · 15th January 2010, 12:35 PM

scoooby03 · 15th January 2010, 12:40 PM

I posted a couple of pics of the board. Can you tell me wich actual cap are you referring to?

jol50 · 19th January 2010, 01:37 AM

The red/white is the remote right? Is the board out of the sink?

Perry Babin · 19th January 2010, 01:42 AM

Is there a capacitor connected to pin 7 of the 555 timer?

If so, that's probably it.

mbates14 · 20th January 2010, 06:00 AM

wow thats an OLD school amp. back when they were built good.

14th January 2010, 05:48 AM	#1
scoooby03 diyAudio Member Join Date: Dec 2009	linear power 2202IQ amp I got two linear power 2202IQ amps. Both of the amps have turn on relays. One amp turns on about 3-4 seconds after the remote turn on signal is applied. The other one turns on simultaneously when a signal is applied to the remote turn on. Now this particular amp makes a turn on pop. Wich I think is also related to the output section being turn on too early. What are the chances the relay needs to be replaced? Another probable cause I can think of is the current is increased somewhere before the relay and causing it to turn on sooner.

14th January 2010, 09:12 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	There's likely an electrolytic capacitor that's out of tolerance and not delaying the turn-on of the relay. If you can't find it, post a good quality photo of the inside of the amp. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

19th January 2010, 01:42 AM	#7
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Is there a capacitor connected to pin 7 of the 555 timer? If so, that's probably it. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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15th January 2010, 04:20 AM	#3
0ldSch00lf00l diyAudio Member Join Date: Aug 2008 Location: Lafayette, Louisiana	You are preaching to the choir on that one Perry. Dried out caps seemed to be a problem with ALL of the older Linear Power amplifiers I once owned. The first thing I would do is replace ALL the 85 degree electrolytic caps with 105 degree long life caps. That generally solved most of my problems, except for the dang power supply noise making its way into the signal path. Just knowing that oscillating noise was there drove me batty, even though I couldn't hear it driving down the highway! The second to last and last series of Linear Power amps that I owned, the LP and DPS series, didn't have the noise issues. Unfortunately my experience with the IQ and earlier series of amplifiers was not so great with regards to noise issues and them being finicky.

15th January 2010, 12:35 PM	#4
scoooby03 diyAudio Member Join Date: Dec 2009

15th January 2010, 12:40 PM	#5
scoooby03 diyAudio Member Join Date: Dec 2009	I posted a couple of pics of the board. Can you tell me wich actual cap are you referring to?

19th January 2010, 01:37 AM	#6
jol50 diyAudio Member Join Date: Nov 2007	The red/white is the remote right? Is the board out of the sink?

20th January 2010, 06:00 AM	#8
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	wow thats an OLD school amp. back when they were built good.

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