Pioneer SX-315 - Answered Questions & Fixed issues

http://safemanuals.com/user-guide-instructions-owner-manual/PIONEER/SX-315%20-HTP-2500--_E

the main thing to buzz is the power transformer does it work ?????

Hi Tracey

Most of these older machine had speaker switches on the front panel. Can you check what they are set to. It may be that both switches(A and B) are set in, or set out. this could present the problem you are having with no sound. turn on just one switch that corresponds the connections you have made on the rear (use speaker A) Another thing to check, is when you first turn on the amp, do you hear a relay click shortly after you switch on. If you don't hear this delayed click, then there may well be a problem in the output stages of the amp. If this is the case, then you will need to take it to a tech to have a look and see what has failed in the amp. Hope this info helps, if you have any questions, I am happy to try and help you further.

regards
robotek

Check the resistance of the primary on the main power transformer, (with power off) should be 1-3 ohms. If open you need a new transformer.

If good turn it on and check for ac voltage (120v) there.

Hi Pete7591

It is more likely to be an output stage problem. The unit will be shutting down as a result if a DC offset in a faulty channel. You will need to isolate the problem somewhat to diagnose what is going on. Do you have a multimeter and a decent knowledge of electronics? If so, then I can talk you throiugh some things to check. If you dont think you are up to it, I would take it to a HiFi repair guy for a look.

It may be more worth your while to buy a refurbished unit here for $132.

I am more than happy to answer any other questions you may have about it, just give me a hoy :)

Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards
robotek

Very carefully prying apart at the seam however some damage is likely to occur the best tool I have found to use is plastic prying tool for auto door trim

I think I just fixed a unit with the same problem. I opened the cover and found where the wire from the headphone jack plugs into a board just beside the power supply transformer. When removed, the unit appeared to select speakers as the output. Since the headphones are never used by the owner, I simply left the headphone cable unplugged. Unfortunately, I didn't have speakers to test it with but the unit appeared to be working correctly.

It thinks have headphones inserted. Do you? Remove them.

DID you have them plugged in just prior to this problem? If so Turn the volume down and insert and remove the headphone plug a number of times to wear off the probbaly oxide build-up on the normally closed contacts.

Press the SHIFT key (lower left) and the CD button at the same time.

I can help you with your Pioneer Receiver & DirecTV remote control.

This is a list of all the Pioneer Receiver control codes for DIrecTV remote controls:

31023, 30150, 30244, 30289,
30531, 30630, 30801, 31123,
31343, 31384, & 31935.

There are so many codes to try for Pioneer Receiver and DirecTV, you might want to go ahead and do a DirecTV Remote Control Code Search.

I hope that helps.
_________________________________________
DirecTV Remote Control Code List Download
DirecTV Remote Control Manual Download
DirecTV Remote Control Code Entry
DirecTV Remote Control Code Search
DirecTV Remote Control Onscreen Setup

Simply stick the tip of a screwdriver in the input and it will reset. (:

I have the exact same problem....help us plz >:/

this unit draws alot of power if you have too many things plugged in on the same circuit then it will shutdown and reset itself. unplug reciever and plug straight into the wall

what kind of noise do you hear? Most of these issues are created from feedback coming from other electrical devices. Move the speakers away from any electrical components, such as other speakers, TV, DVD Players, etc. and test again. This will help you eliminate those items as the cause of the noise. Let me know the results of this solution.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as another possible root cause for intermittent shutdown.

Is the unidentified TV a sound source from the SX-315's perspective? Is it's audio output enabled whene the TV volume is down? Would the Cable Box be a BETTER source?

If the power to the outlet is still good, then I would suspect the power amp IC or output transistors are shorted, keeping the power from coming on. It's also possible that one or more of your speakers are bad feeding back to the receivers output connectors, especially if you were running speakers with a different power rating or impedance that your set is designed for. Hope this helps.

The unit is overheating, or at least thinks it is overheating.

Blow the dust out of the thing and see if that helps. If not, you have a thermistor that is bad or is going bad. Probably the thermistor nearest/on the audio amp transistor's heatsink.

hi,
First of all remove all the speaker connections from the amplifier. After that power the amplifier and check the protect show or not . if not, then any of the speaker is damaged. If then also it shows protect you have to check the amplifiers hardware.

AV receivers shows protect mode , when there is a hardware fault in side it. Its a warning that some thing is wrong.
Normally AV receivers show this when any of the output amplifier get some problem. there are six amplifiers in this AV receiver. May occur when the output diver transistors of any of the amplifier become shorted. if the output transistor get shorted this will lead to flow of current through the speakers. To prevent this there is a protection circuit for each channels. One combined output of this protection circuit is connected to the system control. when the any of the output amplifier fails, the protection circuit detects it and switch of the speaker and sent data to the system control. when the system control get this data it will give a warning to the customer through display that PROTECT.
You have to check the amplifier.
for that you need digital multimeter,soledring iron screwdrivers etc
open the amplifier , then power it on. connect the negative terminal of the multimeter any where in the chase( metal body of the amplifer). then connect the positive terminal to all the output transistors emitter pin one by one . the voltage should be bellow 0.5V. If any of the emitter of the transistor shows voltage more than 0.5V., then that amplifier stage is faulty. Remove the transistors and check it. if it is shot then replace with a new one.
after replacing the transistors do not power up the amplifier directly from the main. You have to put a bulb of 60 watts in serial.
You can do this easily remove the mains fuse. put the bulb in a holder. now you have to wire from the holder. connect one of it to the one end of the fuse holder and the other wire to the other end of the fuse holder. Why using a bulb is, if there is any further problem in the amplifier stage on which the transistors replaced, there is a possibility of the new transistor get damage. if we use a bulb in serial with its mains supply ,when any overload in the amplifier occur the bulb will drop the current, by lighting itself.
After connecting the bulb in serious power on the amplifier. watch the bulb. It should light for one or two second and go dim . if so check the display, is there is protect mode is on or not . if not and come back to normal operation ,then remove the power , remove the bulb insert fuse and check
connect the power and check.
If the bulb shows bright light then there is some component also faulty in the same amplifier. after removing the power you have to check again the amplifier stage of which the transistor is replaced, for any other faulty components.
ok

It's telling you it thinks the headphones are in. Remove them or troubleshoot why it thinks they're in.