Page 3 of 3 FirstFirst 123
Results 31 to 37 of 37

Thread: Pioneer SX-2300 audio output problem

  1. #31
    Join Date
    Oct 2012
    Posts
    122
    Satfix Buxs
    2,438
    Thanks
    129
    Thanked 102x in 57 Posts

    Default

    it seems i have gotten stuck with the same dilemma weather to spend time and cash to repair or just buy new. i am swaying toward new. my spx audio pk06210/212 400w power amp suddenly died. i have looked for schematic to no avail. i already checked the power transistors and dual diodes for voltage doubbler, large electro caps i have not tested with power to follow and check zeners.

    with ground connected and remote power red light turns on if i apply main power red led turns off green one does nothing it has an over temp circuit sensor works

    seems when you apply power it turns on no sound. you can here the thump,no sound like the low level amp is dead or no power getting to the ic. replacing the ic's not worth it i think, considering a new pyle 1400w amp is only 60 bucks.

    if i could find a schematic might help debugging. just to play with it.

  2. #32
    Join Date
    Oct 2009
    Posts
    9,003
    Satfix Buxs
    4,002,465
    Thanks
    3,658
    Thanked 8,666x in 3,246 Posts
    Items PhoneHeartVintage truck
Gift received at 12-23-2012, 09:06 AM from ICEMAN
Message: thank you budTVCoffee makerPinkfloydthe travel gnomeTractor

    Default

    Quote Originally Posted by nunoit View Post
    the 78m12 is a 12v regulator readings should be good. remount and check for 12v on pin 3. mounted and looking at front pins are left to right 1 input 2 ground 3 12 v output. test while mounted and powered up.
    also my bad since its a 12 v regulator it has nothing to do with the over load circuit.

    on the relay there are 6 pins 4 close together 2 on other end, the 2 by them self's are the coil. set you meter for ohms any one will do touch leads together. should read shorted.(continunity) now touch the 2 pins on the relay, you should read shorted. if not relay is bad. you can test the other 4 as well they should read open any combination of the 4 pins.

    picture and schematics show the other zener diodes are for the power supply. according to the schematic the only zener diode for the relay is D-610, and is also 12 v regulator. from the side with the band you should get 12 v while powered up. as long as Q-601, Q-602, Q-604 and Q-605 (power off mute) transistors are working.

    which leads to a mute circuit which could also be a problem, if there is one that is. so test all the transistors that i said in previous post.

    just some FYI

    on analyzing the circuit when power is turned on Q's 605 and 604 apply power to relay, now Q's Q-523 and Q-524 monitor the right and left channels of the output amp, if all is good they send signal to Q-601, Q-602, which allows Q-604 to continue to function correctly. if not the relay turns off to protect the power transistors from burning up.

    terryl i did not realize you had made the same analysis on the circuit. don't want step on toes. did not read your post.
    No problems we are all here to help out.

    It looks like his mute circuit may not be working correctly as the relay is not turning on, looking at L501 and 502 with a speaker or a pair of head phones (with the headphones fed through a 330 ohm 1 watt resistor first) would tell if this is the case, he should hear something at those inductors (with the receiver set to a known radio station) as they feed the speaker outputs.

    That relay does three job's, one to act as an overload preventer, two to act as a mute circuit when you press the mute button, and three to act as a power down/on mute so you don't hear a loud POP when the power is turned off or on.

    There is a very small delay turning the relay on when the receiver turns on, and it shuts off the relay first when the power is shut off.
    ♫♫♫ I’m a lumberjack and I’m OK ♫♫♫ I drink all night and sleep all day. ♫♫♫



    Coming soon to a crop circle near you.....

    There is a 66 and third % chance that I'm on the right planet...

    "I'm happier then a Jackalope in a balloon factory"

    "First rule of testing satellites"
    "If its working fine now, then don't mess with it"

    "Second rule of testing satellites"
    "If you did mess with it, and now it doesn't work, can you blame someone else?"

    "Third rule of testing satellites"
    "If you did mess with it, and it doesn't work now, and you can't blame someone else"
    "Can you HIDE it"?

  3. The Following User Says Thank You to Terryl For This Useful Post:


  4. #33
    Join Date
    Oct 2009
    Posts
    9,003
    Satfix Buxs
    4,002,465
    Thanks
    3,658
    Thanked 8,666x in 3,246 Posts
    Items PhoneHeartVintage truck
Gift received at 12-23-2012, 09:06 AM from ICEMAN
Message: thank you budTVCoffee makerPinkfloydthe travel gnomeTractor

    Default

    Quote Originally Posted by nunoit View Post
    it seems i have gotten stuck with the same dilemma weather to spend time and cash to repair or just buy new. i am swaying toward new. my spx audio pk06210/212 400w power amp suddenly died. i have looked for schematic to no avail. i already checked the power transistors and dual diodes for voltage doubbler, large electro caps i have not tested with power to follow and check zeners.

    with ground connected and remote power red light turns on if i apply main power red led turns off green one does nothing it has an over temp circuit sensor works

    seems when you apply power it turns on no sound. you can here the thump,no sound like the low level amp is dead or no power getting to the ic. replacing the ic's not worth it i think, considering a new pyle 1400w amp is only 60 bucks.

    if i could find a schematic might help debugging. just to play with it.
    SPX is a company in and made in Warsaw Poland try this for a contact use Google translate to make up a message to them, and ask for a schematic.
    ♫♫♫ I’m a lumberjack and I’m OK ♫♫♫ I drink all night and sleep all day. ♫♫♫



    Coming soon to a crop circle near you.....

    There is a 66 and third % chance that I'm on the right planet...

    "I'm happier then a Jackalope in a balloon factory"

    "First rule of testing satellites"
    "If its working fine now, then don't mess with it"

    "Second rule of testing satellites"
    "If you did mess with it, and now it doesn't work, can you blame someone else?"

    "Third rule of testing satellites"
    "If you did mess with it, and it doesn't work now, and you can't blame someone else"
    "Can you HIDE it"?

  5. The Following User Says Thank You to Terryl For This Useful Post:


  6. #34
    Join Date
    Feb 2013
    Posts
    317
    Satfix Buxs
    138,501
    Thanks
    269
    Thanked 151x in 89 Posts

    Default

    Terryl and nunoit unfortunately i have been to busy has of right know the pioneer SX_2300 is on hold when i have more free time and on top of that I think that pioneer is getting closer and closer to the recycle bin lol but lets see when my summer vacation comes maybe I'll have time to play with it again till then project is on hold

  7. #35
    Join Date
    Oct 2012
    Posts
    122
    Satfix Buxs
    2,438
    Thanks
    129
    Thanked 102x in 57 Posts

    Default

    terry thanks for the link i will try. skywalker don't worry when you get back to it post or pm to let us know when you are ready.
    i have other things that i do as well. good luck

    sent e-mail will see what there response will be.
    Last edited by nunoit; 07-09-2013 at 06:46 PM.

  8. #36
    Join Date
    Oct 2012
    Posts
    122
    Satfix Buxs
    2,438
    Thanks
    129
    Thanked 102x in 57 Posts

    Default

    haven't heard any thing on the spx amp of mine. so its back burner for now ill go and buy a new one for now.

  9. #37
    Join Date
    Oct 2012
    Posts
    122
    Satfix Buxs
    2,438
    Thanks
    129
    Thanked 102x in 57 Posts

    Default

    good news on the spx amp. i had a few minutes so i decided to check the power flow.found what looked like a bad zener 16.5v. i pulled and tested was good so i am like what the heck is reading shorted. found a 220uf 6v cap bad for the pre-amp section. replaced and we are back in business.

Page 3 of 3 FirstFirst 123

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •