1. Rest in Peace Paul (Kegger) If you would like to help the family in this time of great sorrow and need, you may donate on their GoFundme page: https://www.gofundme.com/mckechnie-medical-and-funeral-fund?
    Dismiss Notice

Pioneer SX 990 lights/bulbs replacement help.

Discussion in 'Pioneer Audio' started by danconway327, Mar 6, 2017.

  1. john stumpf

    john stumpf AK Subscriber Subscriber

    Messages:
    289
    Location:
    philippines
    with the master switch on,setting your meter to the ac volts position,do you have power to the fuse for the lights? it should read about 7.5vac to chassis ground. look on the back panel near the serial number and tell me the model code you have it will be a letter code fsaw,fvw,fvzw,,kcu.kuw,or,nbw
     
    Last edited: Mar 21, 2017
  2. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    Thanks John. It is a KUW. I'VE packed up for the night. I will try that tomorrow and report back
    .
     
  3. john stumpf

    john stumpf AK Subscriber Subscriber

    Messages:
    289
    Location:
    philippines
    we need to be on the same page.print a copy of the schematic and make sure its for a kuw.
     
  4. loudnoises

    loudnoises Escalates Quickly Subscriber

    Messages:
    851
    Location:
    Pondside, NH
    Looking inside mine (which happens to be on the bench) all the grounds for the selector switch gang together in a huge nasty un-pioneer mess of solder and wires right behind it. Pretty sure this was not a repair..

    I'd check there for a loose wire. are you getting continuity to ground at the lamps?
    come to think of it i haven't read the schematic recently, that might not be ground, but power.
     
  5. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    It's a KUW. kuw.jpg
     
  6. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    And here is the page in the schematic with the KUW in it.
     

    Attached Files:

  7. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    sx990 top view.jpg And here are top and bottom views. I am new to this so how would I "do you have power to the fuse for the lights?"
     

    Attached Files:

  8. loudnoises

    loudnoises Escalates Quickly Subscriber

    Messages:
    851
    Location:
    Pondside, NH
    Sorry to hijack a bit, lurking on this and my unit is a KLM... what do these codes mean?
     
  9. loudnoises

    loudnoises Escalates Quickly Subscriber

    Messages:
    851
    Location:
    Pondside, NH
    With a voltmeter. red to fuse, black to ground. Set for AC.
     
  10. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    not sure but there are a bunch of them to the sx 990
     
  11. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    sx990 bottom view.jpg so i have my multimeter set to 600 v, and I put the black on the chassis and the red on which end of the fuse? I get 00.7 when I touch the left side and 0.0 when I touch hje right side of the fuse the one under transformer on the top left (under the blue and yellow wires).
     
    Last edited: Mar 23, 2017
  12. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    When I measure the 2 fuses to the right of the transformer I get 045 when I touch the top and 045 when I touch the bottom of the fuse on top,...I get 045 when I touch the top and 045 when I touch the bottom of the fuse on the bottom,
     
  13. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    When I measure the fuse to the bottom left of the transformer(with the yellow wires going to it) I get 001 on top and 001 on bottom.
     
  14. john stumpf

    john stumpf AK Subscriber Subscriber

    Messages:
    289
    Location:
    philippines
    set your meter to a lower ac scale. REFER TO THE SCHEMATIC and at the top FIND THE PLUG, AC from the outlet.read down .you will notice the con venience out lets that are the back of the set. with the switch on read THE SWITCHED OUTLET IT SHOULD READ LINE VOLTAGE. if YES, you must find and check the TWO fuses in series this set has for the ac input. they are "down stream" from the switch. IF the switched outlet reads ZERO you have a problem with the master switch or no power to it. un plug it and follow the wires if necessary and stay away from any caps that might be charged.put probes in the socket dont try read to ground
     
    Last edited: Mar 23, 2017
  15. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    Ok so I checked the switched and the unswitched plugs and they all read 122.9 with my mm set at 200v
     
  16. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    I have the multimeter set on 200v and the reading I get on the fuse connected to the switched plug is 1.5 on the side closest to the plug and 1.5 on the other end also.
     
  17. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    I have the multimeter set on 200v and the reading I get on the next fuse in line is 7.9 at the side closest to the plug and 1.5 on the other end also.o nada at the other end. So something is wrong wit this fuse correct?
     
  18. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    Is there electricity still stored in the stereo after it is unplugged?
     
  19. john stumpf

    john stumpf AK Subscriber Subscriber

    Messages:
    289
    Location:
    philippines
    i say again, read the switched outlet plugged in with the master switch on. read it like like you would a wall outlet NOT TO GROUND
     
  20. danconway327

    danconway327 Active Member

    Messages:
    139
    Location:
    Florida USofA
    BOOM LET THERE BE LIGHT. That fuse was bad now I have lights on the unit. I will button it up for the night and fire it up tomorrow.

    BIG THANKS TO jOHN N LOUDNOISES FOR YOUR HELP.
     

Share This Page