Question about KLH R5100 Receiver

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No audio output

What is the mfg code for the audio output amplifiers IC chip

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Check the numbers of the parst attached on aluminum heat sinker.

Posted on Sep 13, 2008

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What are the functions of the impedance button on the Technics SA-AX730


This allows you to select the correct amplifier output impedance for the particular speakers you have connected, Proper selection insures the best efficiency, response and prevents potential damage to speakers or the amplifier, Refer to page 17 of this manual:
http://audio.manualsonline.com/manuals/mfg/technics/technics_sa_saax730.html

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My amplifier has no audio


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Arcam A65 amplifier keep on go to standymode why?


Depending on the volume level and how many speakers you are driving factor into how the amp will react. Check the speaker wires for shorts, if okay! then we must look at the audio output stage, if the semiconductors are getting to hot, the satety circuits will cause a shutdown, if you run a pair of speakers the amp will run cooler, if you recently added more speakers that would explain the shutdown, if not! there is a problem in the audio output transistors and ic's that will need to be dealt with.

Apr 14, 2012 | Arcam Audio & Video Receivers

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Techwood DDR95 av keeps going into protect mode


Protect is an error code for short and or overload. It will appear once the processor sense a malfunction either on the power supply or on the load (high chance is the output IC). DIY steps are as follow to determine where the fault is : 1. Allow the unit to cool down for an hour. Give proper ventilation and keep away all obstruction from the vent to have a sufficient air flow. 2. Disconnect one at a time the speakers, inputs, from the unit while powering it on.

If the unit back to normal again then you've confirmed that any of the above caused the error code. If #1 is the caused, you have to check also the exhaust fan, clean it as much as possible, replaced if faulty. If #2 is the caused (speaker) check the wire and speakers for short, (input) check the RCA cord for short or replaced if necessary.

If the above simple fix didn't cure the error code, you can try the next steps if you are an electronics enthusiast. Now after removing the cover, you have to concentrate first on the power supply board. Look for bulged electrolytic capacitor. Leaky capacitor will affect the regulation of the supply and will trigger the error code. Look for dry joints. Check it also in the pre-amplifier stage, main output board where a big heat sink is located. Next disable the output amplifier stage by disconnecting the supply. If the unit come out, make some re-soldering on the board, spot the cold solder and dry joints and then try to connect again. If the error code appear again, high chance that your output IC is faulty but still to be confirmed. Using the disoldering pump and soldering iron pull-out the output IC from the board then try the unit. If the error code disappear, confirmed that your IC is faulty.After trying the above steps-by-steps guide and still the symptoms persist this is the time for you to send it to repair shop. Remember that your unit has a lot of parts and only some basic steps have done, leave the expert to troubleshoot the entire unit.

Dec 15, 2011 | Audio & Video Receivers

1 Answer

My Zone 2 will only work on Tuner, CD, or AUX mode... but I can't get the Cable Sound to play on zone 2...


HI, thanks for posting your Question..

You control board might be faulty. It might be just dust disturbing it from working properly.

You can also check the line out of zone 2 by opening it up to check the output IC chip if it needs re soldering..check some other IC working with zone 2 output and C if those IC needs to be replace or just needs resoldering.

AM sure it's not a big problem..As far as other outputs are working properly..



Good luck.

Sep 15, 2011 | Onkyo HT-RC160

1 Answer

Goes to protect


Hi,

Protect is an error code for short and or overload. This will appear once the processor sense a malfunction either on the power supply or on the load (high chance is the output IC). DIY steps are as follow to determine where the fault is : 1. Allow the unit to cool down for an hour. Give proper ventilation and keep away all obstruction from the vent to have a sufficient air flow. 2. Disconnect one at a time the speakers, inputs, from the unit while powering it on.

If the unit back to normal again then you've confirmed that any of the above caused the error code. If #1 is the caused, you have to check also the exhaust fan, clean it as much as possible, replaced if faulty. If #2 is the caused (speaker) check the wire and speakers for short, (input) check the RCA cord for short or replaced if necessary.

If the above simple fix didn't cure the error code, you can try the next steps if you are an electronicsenthusiast. Now after removing the cover, you have to concentrate first on the power supply board. Look for bulged electrolytic capacitor. Leaky capacitor will affect the regulation of the supply and will trigger the error code. Look for dry joints. Check it also in the pre-amplifier stage, main output board where a big heat sink is located. Next disable the output amplifier stage by disconnecting the supply. If the unit come out, make some re-soldering on the board, spot the cold solder and dry joints and then try to connect again. If the error code appear again, high chance that your output IC is faulty but still to be confirmed. Using the disoldering pump and soldering iron pull-out the output IC from the board then try the unit. If the error code disappear, confirmed that your IC is faulty.After trying the abovesteps-by-steps guide and still the symptoms persist this is the time for you to send it to repair shop. Remember that your unit has a lot of parts and only some basic steps have done, leave the expert to troubleshoot the entire unit.

Give a thumbs up if you find it useful.

Have a nice day!

Thanks for using Fixya.

Feb 11, 2011 | Harman Kardon AVR 35 Receiver

1 Answer

The ic tda7293 is exploited, and I have no further information on the motherboard, I need to find the service manual, thanks


TDA7293 is a high-power high- voltage DMOS audio amplifier IC made by STMICROELECTRONICS. Its rated output power is 100W and maximum operating voltage is120V. And it is a monolithic integrated circuit in Multiwatt15 package which is intended for use as audio class AB amplifier in Hi-Fi field applications, such as home stereo, self powered loudspeakers and Topclass TV.

Feb 07, 2011 | Audio & Video Receivers

1 Answer

I have no sound coming out of receiver all of a sudden. Connected speakers to another radio and speakers work fine. Everything looks fine on receiver just no sound. Oh, and the mute button is not on.


It is an indication that you have a faulty output ic.
Output ic is responsible for amplifying the audio from your reciever to sound output which is converted by your speakers.

If you're output ic is defective then definitely you haven't sound produce even your unit is working.

I've advice you to look for a qualified technician to checked the condition of your output ic and do some re-soldering for some dry joints on the board.

Thanks for using fixya...

Jan 09, 2011 | Sony STR-DE335 Receiver

2 Answers

Pioneer vsx_D710S whatever can be the input source,the flag " poweroff" apears and switch off the system. Seems to have no time rules, shut down frequency connected with hazard ...... No...


I'm not sure what kind of an answer you are looking for. If you are not qualified to do some soldering rework and ready to spend some money (could be as much as 50$) for parts, you better look for a professional service that in most cases will cost as mush (or more) as your receiver.

If you are still reading then here you are. This is a common symptom of a blown hybrid amplifier IC caused by shorting speaker output while it's powered on. There are two protection circuits for amplifier output, Overload and DC output. In your case, most probably, DC output protection is the one that shuts down amplifier to prevent further damage. Find schematics (service manual). To confirm this, look for amplifier inputs connector, measure DC DET. signal, normally it should be around +4.85V. If right after power up it goes down to almost 0V, then it is for sure a blown output on a Hybrid IC. Check whether receiver shuts down with that cable unplugged. If not than get ready to do some rework.

There are two big Hybrid amplifier ICs, one that outputs two channels (usually front left and front right) and 3 channels (for the rest). One of the outputs (if not more) one one of them (if not both) is blown. In most of the 5.1 Pioneer receivers 2 channel IC is PAC010A and 3 channel one is PAC011A. If you want to get original parts and will find those for less then 40$ each you are lucky. There are however cheaper replacements from SANYO, those you can find for around 10-15$.

Find schematics, unsolder resistors one by one that connect AMP outputs to DC detection circuit on each IC and check which one is blown. There are 2 for 2 channel one and 3 for the other. Usually if one output is blown all others on the same IC are blown.

There could be a chance that only one channel on IC is blown, if you want to fix it you still need to replace whole IC. Also, instead of spending on new IC you may want to sacrifice one working channel (center for example) to output the blown one (so you'll get 4.1 :) ).

Nov 11, 2010 | Pioneer VSX-D710S Receiver

1 Answer

When i turn it on, it says F61 when i turn it on, it says F61


This is the code for "protect" mode. A problem has been detected in the output stage of the amplifier and the unit has shutdown to prevent further damage. The most common problem is the failure ofthe output amp-pac IC. Depending upon the specific model of your unit, the part can cost from $75-$100.

Dan

Nov 19, 2009 | Panasonic Audio & Video Receivers

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