Thanks Thanks:  0
Likes Likes:  1
Results 1 to 8 of 8

Thread: Need a DOLBY NR selector switch for a SANSUI QRX 9001

  1. #1
    Member
    Join Date
    Jun 2012
    Location
    Merced, Calif
    Posts
    34
    Points
    4,431
    Level
    42
    Level completed: 41%, Points required for next Level: 119
    Overall activity: 4.0%
    Achievements:
    1000 Experience PointsVeteran
    Post Thanks / Like

    Unhappy Need a DOLBY NR selector switch for a SANSUI QRX 9001

    Hello, I am in need of a "working" DOLBY NR selector switch. I hope someone can help on this. I was told the quad ability runs through this switch . Unfortunately , I purchased one only to find when installed , it too did not work. That was a waste of a lot of money and time.

  2. #2
    Member Banjo800's Avatar
    Join Date
    Apr 2015
    Location
    Sunny Northwest GA
    Posts
    52
    Points
    2,598
    Level
    30
    Level completed: 99%, Points required for next Level: 2
    Overall activity: 0%
    Achievements:
    1000 Experience Points1 year registered
    Post Thanks / Like

    Default Re: Need a DOLBY NR selector switch for a SANSUI QRX 9001

    Quote Originally Posted by rawmacias View Post
    Hello, I am in need of a "working" DOLBY NR selector switch. I hope someone can help on this. I was told the quad ability runs through this switch . Unfortunately , I purchased one only to find when installed , it too did not work. That was a waste of a lot of money and time.
    Can you describe the exact symptoms you are experiencing?

  3. #3
    Member
    Join Date
    Jun 2012
    Location
    Merced, Calif
    Posts
    34
    Points
    4,431
    Level
    42
    Level completed: 41%, Points required for next Level: 119
    Overall activity: 4.0%
    Achievements:
    1000 Experience PointsVeteran
    Post Thanks / Like

    Default Re: Need a DOLBY NR selector switch for a SANSUI QRX 9001

    I bought the unit with only the two front channels working. I took the unit to a repair shop . The shop owner said the Dolby NR switch was bad and that the front and back channels ran through the switch. So I went online and found a switch that was supposed to be in working order. The shop owner installed the switch and found that it too was not working right. He could only get the two front channels to work. He said that he might be able to bypass the switch and make it a quad only receiver. Thus I need a working switch . I already owe a lot of man hours and still back to square one.

  4. #4
    Member
    Join Date
    Jun 2012
    Location
    Merced, Calif
    Posts
    34
    Points
    4,431
    Level
    42
    Level completed: 41%, Points required for next Level: 119
    Overall activity: 4.0%
    Achievements:
    1000 Experience PointsVeteran
    Post Thanks / Like

    Default Re: Need a DOLBY NR selector switch for a SANSUI QRX 9001

    Also , the shop owner is a Sansui collector and has quite a few receivers himself. So he does know Sansui equipt.

  5. #5
    700 Club - QQ All Star
    Join Date
    Nov 2010
    Posts
    734
    Points
    7,509
    Level
    57
    Level completed: 80%, Points required for next Level: 41
    Overall activity: 5.0%
    Achievements:
    Veteran5000 Experience Points
    Post Thanks / Like

    Default Re: Need a DOLBY NR selector switch for a SANSUI QRX 9001

    Wow. One in a million? There are other much more likely things to cause that, and to see two switches seem to cause the same symptom seems improbable. I know you have no suspicion of the servicer, but having been there, I can't help but wonder if he flexed the dolby assembly and heard the channels pop back in. I thought I had a bad switch in a 9090 before I knew about through-board connection problems. I did have one bad switch in a 9090 but it was a current-carrying terminal that supplied power to dial lamps only when tuner was selected.

    Switches of all types do go bad if they've seen a lot of use though. I've just never used a dolby switch, just leave it off, except to work it around when I operate all switches looking for noisy contacts. Maybe that's the problem, it is a switch that rarely gets used so any oxidation never gets scraped off. You did work all the switches to see if there was any sign of life from the rear channels, right? I think there's also a separate protection relay for Front and Rear but I'd have to dig through a schematic.

    I'm interested to hear the outcome.

    -john

  6. Likes chuckflhp liked this post
  7. #6
    Member bangsezmax's Avatar
    Join Date
    Jan 2006
    Posts
    190
    Points
    10,422
    Level
    67
    Level completed: 93%, Points required for next Level: 28
    Overall activity: 3.0%
    Achievements:
    Veteran10000 Experience Points
    Post Thanks / Like

    Default Re: Need a DOLBY NR selector switch for a SANSUI QRX 9001

    My immediate thought was those through-board connections. Those are notorious for causing problems.

    Did anybody test either of the switches? Shouldn't be difficult to if they're on the bench. Either you have good connectivity or you don't. It at least eliminates (or confirms) that as being the culprit.

  8. #7
    1K Club - QQ Shooting Star DuncanS's Avatar
    Join Date
    Aug 2012
    Location
    UK
    Posts
    2,399
    Points
    23,784
    Level
    94
    Level completed: 44%, Points required for next Level: 566
    Overall activity: 82.0%
    Achievements:
    10000 Experience PointsVeteranSocial
    Post Thanks / Like

    Default Re: Need a DOLBY NR selector switch for a SANSUI QRX 9001

    I just had a look at the user manual & schematic on https://www.hifiengine.com/manual_li...qrx-9001.shtml

    It has Dolby FM, OFF, Play & record for the Dolby switch. So I'm assuming in OFF it didn't work.

    If it was simply the switch it would work in another position, so turn the Sansui to the FM tuner, select the Dolby FM mode on the switch, and put it into a Quad mode and something ought to come out of all 4 channels, even if its noise. If nothing comes out of the rear channels its more likely its something else.
    177 SACD (159 Multi, 18 Stereo), 218 DVD-Audio/DTS/DD, 10 Blu-ray Audio, 14 SQ LPs, 2218 plain old stereo CDs

  9. #8
    Member
    Join Date
    Jun 2012
    Location
    Merced, Calif
    Posts
    34
    Points
    4,431
    Level
    42
    Level completed: 41%, Points required for next Level: 119
    Overall activity: 4.0%
    Achievements:
    1000 Experience PointsVeteran
    Post Thanks / Like

    Default Re: Need a DOLBY NR selector switch for a SANSUI QRX 9001

    Yeah , I have a lot of faith in the shop owner knowing what he is doing. I have done business with him for the last twenty years . And he restores and collects vintage Sansui equipt . So I am sure he would know about needing to check connections due to age. What I really need is a switch that has been tested and found to be in good order.

Posting Permissions

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