Belles 22A Inputs

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xsmi
xsmi Posts: 1,812
in Electronics
On my Belles 22A pre, only 2 of the five inputs seem to work. I contacted Belles back in February and they never got back to me. So, I think I'm going to open it up. Can anyone tell me what I should be looking for, besides loose wires? Thanks
2-channel Yaqin B2-T Pre, Emotiva XPA-2 Gen 2, Marantz SA8005, Pro-Ject RPM-10 Turntable, Denon DP-59L Pro-Ject Phono Box DS3B, Polk Audio Legend L800's, AudioQuest Cable throughout.
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  • Unknown
    Unknown
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    This content has been removed.
  • xsmi
    xsmi Posts: 1,812
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    Hmm, solder joints maybe?
    2-channel Yaqin B2-T Pre, Emotiva XPA-2 Gen 2, Marantz SA8005, Pro-Ject RPM-10 Turntable, Denon DP-59L Pro-Ject Phono Box DS3B, Polk Audio Legend L800's, AudioQuest Cable throughout.
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  • VR3
    VR3 Posts: 29,751
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    Depends on how it changes inputs. There are sometimes relays and such at work that can go bad

    But holy circuit board batman!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • xsmi
    xsmi Posts: 1,812
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    Any way to test?
    2-channel Yaqin B2-T Pre, Emotiva XPA-2 Gen 2, Marantz SA8005, Pro-Ject RPM-10 Turntable, Denon DP-59L Pro-Ject Phono Box DS3B, Polk Audio Legend L800's, AudioQuest Cable throughout.
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  • audioluvr
    audioluvr Posts: 6,079
    edited April 2024
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    My 21A had the same problem. The relays fail. I had Hi-Tech Audio replace all of them with better quality ones.

    PM me and I'll shoot you a copy of the receipt.
    Gustard X26 Pro DAC
    Belles 21A Pre Upgraded with Mundorf Supremes
    B&K M200 Sonata monoblocks refreshed and upgraded
    Polk SDA 1C's modded / 1000Va Dreadnaught
    Wireworld Silver Eclipse IC's and speaker cables
    Harman Kardon T65C w/Grado Gold. (Don't laugh. It sounds great!)

    There is about a 5% genetic difference between apes and men …but that difference is the difference between throwing your own poo when you are annoyed …and Einstein, Shakespeare and Miss January. by Dr. Sardonicus
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  • F1nut
    F1nut Posts: 52,406
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    The white blocks are the relays. Spec info is printed on them. Sounds like you should upgrade all of them to whatever audioluvr's tech used.
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  • xsmi
    xsmi Posts: 1,812
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    Thanks.
    2-channel Yaqin B2-T Pre, Emotiva XPA-2 Gen 2, Marantz SA8005, Pro-Ject RPM-10 Turntable, Denon DP-59L Pro-Ject Phono Box DS3B, Polk Audio Legend L800's, AudioQuest Cable throughout.
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  • xsmi
    xsmi Posts: 1,812
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    I count 9, correct? And which numbers are important for the replacements?
    6pqhfvka5q0u.jpeg
    2-channel Yaqin B2-T Pre, Emotiva XPA-2 Gen 2, Marantz SA8005, Pro-Ject RPM-10 Turntable, Denon DP-59L Pro-Ject Phono Box DS3B, Polk Audio Legend L800's, AudioQuest Cable throughout.
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  • F1nut
    F1nut Posts: 52,406
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    Here are the specs.
    https://www.newark.com/axicom-te-connectivity/v23105-a5475-a201/power-relay-dpdt-3a-5vdc-th/dp/24M9084
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  • xsmi
    xsmi Posts: 1,812
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    Thank you sir!
    2-channel Yaqin B2-T Pre, Emotiva XPA-2 Gen 2, Marantz SA8005, Pro-Ject RPM-10 Turntable, Denon DP-59L Pro-Ject Phono Box DS3B, Polk Audio Legend L800's, AudioQuest Cable throughout.
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  • billbillw
    billbillw Posts: 8,287
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    Hopefully that solves it. If not, check the power supply caps and such. Get out the magnifying glass and look around the bottom of the board too. Cold solder joints are common on the board mounted RCA jacks. I've had to fix quite a few over the years. Anything that doesn't look smooth and shiny could be suspect.
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  • F1nut
    F1nut Posts: 52,406
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    xsmi wrote: »
    Thank you sir!

    While you are in there with the solder gun warmed up replacing all of those nasty Dayton/Bennic caps would be an excellent idea. Seriously.
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  • xsmi
    xsmi Posts: 1,812
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    F1nut wrote: »
    xsmi wrote: »
    Thank you sir!

    While you are in there with the solder gun warmed up replacing all of those nasty Dayton/Bennic caps would be an excellent idea. Seriously.

    Great minds, bro!
    2-channel Yaqin B2-T Pre, Emotiva XPA-2 Gen 2, Marantz SA8005, Pro-Ject RPM-10 Turntable, Denon DP-59L Pro-Ject Phono Box DS3B, Polk Audio Legend L800's, AudioQuest Cable throughout.
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