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  • Roland JV-80 Keyboard repair

    From John Robertson@21:1/5 to All on Wed Nov 24 14:26:18 2021
    My son-in-law asked me to look at his JV80 Roland keyboard as it didn't
    seem to work properly.

    Found the operators and service manuals on line and discovered the
    keyboard wouldn't go into self test. Took back off and started checking
    the switches - found that ALL 54 push-button PC mount switches had
    failed or were marginal at best.

    Replaced all the switches (gotta love single sided phenolic PCBs...) and
    now it works a treat.

    So if you have any musician friends with wonky keyboards the solution is
    often simple...

    John :-#)#
    --

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Tim R@21:1/5 to John Robertson on Thu Nov 25 06:28:32 2021
    On Wednesday, November 24, 2021 at 5:26:29 PM UTC-5, John Robertson wrote:
    My son-in-law asked me to look at his JV80 Roland keyboard as it didn't
    seem to work properly.

    Found the operators and service manuals on line and discovered the
    keyboard wouldn't go into self test. Took back off and started checking
    the switches - found that ALL 54 push-button PC mount switches had
    failed or were marginal at best.

    Replaced all the switches (gotta love single sided phenolic PCBs...) and
    now it works a treat.

    So if you have any musician friends with wonky keyboards the solution is often simple...

    John :-#)#
    --

    Just curious. That's an older 61 key synth, per google. (I'd not heard of a 54 key keyboard so I looked it up.) So why are there only 54 switches for 61 keys?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bitrex@21:1/5 to Tim R on Thu Nov 25 12:32:27 2021
    On 11/25/2021 9:28 AM, Tim R wrote:
    On Wednesday, November 24, 2021 at 5:26:29 PM UTC-5, John Robertson wrote:
    My son-in-law asked me to look at his JV80 Roland keyboard as it didn't
    seem to work properly.

    Found the operators and service manuals on line and discovered the
    keyboard wouldn't go into self test. Took back off and started checking
    the switches - found that ALL 54 push-button PC mount switches had
    failed or were marginal at best.

    Replaced all the switches (gotta love single sided phenolic PCBs...) and
    now it works a treat.

    So if you have any musician friends with wonky keyboards the solution is
    often simple...

    John :-#)#
    --

    Just curious. That's an older 61 key synth, per google. (I'd not heard of a 54 key keyboard so I looked it up.) So why are there only 54 switches for 61 keys?


    Don't think he's talking about the keyboard (which then was probably
    using those rubber cup-type membrane switches that also get gunked up,
    but can often be cleaned up to work nice again with some isopropyl),
    those are the 54 buttons on the user interface:

    <https://img.audiofanzine.com/images/u/product/normal/roland-jv-80-851.jpg>

    Enormously complex and poorly-organized user interfaces are something of
    a Roland/Japanese signature, the claim goes Japanese buyers love
    studying user manuals.

    Nice-sounding synths, though, if you can figure them out.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rayner Lucas@21:1/5 to All on Thu Nov 25 19:35:24 2021
    In article <196f12fc-8cb7-4f4f-bd9d-c33de47d63b7n@googlegroups.com>, timothy42bach@gmail.com says...

    On Wednesday, November 24, 2021 at 5:26:29 PM UTC-5, John Robertson
    wrote:
    My son-in-law asked me to look at his JV80 Roland keyboard as it
    didn't seem to work properly.

    Found the operators and service manuals on line and discovered the
    keyboard wouldn't go into self test. Took back off and started
    checking the switches - found that ALL 54 push-button PC mount
    switches had failed or were marginal at best.

    Replaced all the switches (gotta love single sided phenolic PCBs...)
    and now it works a treat.

    Just curious. That's an older 61 key synth, per google. (I'd not heard
    of a 54 key keyboard so I looked it up.) So why are there only 54
    switches for 61 keys?

    I'm guessing that's the tactile switches used for selecting various
    functions, rather than the keys themselves (although I count 56 push-
    buttons rather than 54). This seems to be a known failure mode on some
    older Roland synths; there are certainly maintenance kits out there with
    the appropriate numbers of switches.

    I should really get around to fixing my two broken D-50s, which do have temperamental buttons, but also have more immediate problems (one has
    random bursts of noise, the other has been previously "repaired" by
    someone whose desoldering technique could hardly have been more
    destructive if they'd used a blowtorch and chisel).

    R

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bitrex@21:1/5 to Rayner Lucas on Thu Nov 25 15:03:40 2021
    On 11/25/2021 2:35 PM, Rayner Lucas wrote:
    In article <196f12fc-8cb7-4f4f-bd9d-c33de47d63b7n@googlegroups.com>, timothy42bach@gmail.com says...

    On Wednesday, November 24, 2021 at 5:26:29 PM UTC-5, John Robertson
    wrote:
    My son-in-law asked me to look at his JV80 Roland keyboard as it
    didn't seem to work properly.

    Found the operators and service manuals on line and discovered the
    keyboard wouldn't go into self test. Took back off and started
    checking the switches - found that ALL 54 push-button PC mount
    switches had failed or were marginal at best.

    Replaced all the switches (gotta love single sided phenolic PCBs...)
    and now it works a treat.

    Just curious. That's an older 61 key synth, per google. (I'd not heard
    of a 54 key keyboard so I looked it up.) So why are there only 54
    switches for 61 keys?

    I'm guessing that's the tactile switches used for selecting various functions, rather than the keys themselves (although I count 56 push-
    buttons rather than 54). This seems to be a known failure mode on some
    older Roland synths; there are certainly maintenance kits out there with
    the appropriate numbers of switches.

    I should really get around to fixing my two broken D-50s, which do have temperamental buttons, but also have more immediate problems (one has
    random bursts of noise, the other has been previously "repaired" by
    someone whose desoldering technique could hardly have been more
    destructive if they'd used a blowtorch and chisel).

    R


    My impression of Roland from the 80s/early 90s is that quality control
    wasn't great, they seem to have more problems at this point. Yamaha
    stuff were tanks

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Robertson@21:1/5 to Tim R on Fri Nov 26 15:01:52 2021
    On 2021/11/25 6:28 a.m., Tim R wrote:
    On Wednesday, November 24, 2021 at 5:26:29 PM UTC-5, John Robertson wrote:
    My son-in-law asked me to look at his JV80 Roland keyboard as it didn't
    seem to work properly.

    Found the operators and service manuals on line and discovered the
    keyboard wouldn't go into self test. Took back off and started checking
    the switches - found that ALL 54 push-button PC mount switches had
    failed or were marginal at best.

    Replaced all the switches (gotta love single sided phenolic PCBs...) and
    now it works a treat.

    So if you have any musician friends with wonky keyboards the solution is
    often simple...

    John :-#)#
    --

    Just curious. That's an older 61 key synth, per google. (I'd not heard of a 54 key keyboard so I looked it up.) So why are there only 54 switches for 61 keys?


    It was 56 (I miscounted) option tactile small button switches, not the
    keyboard itself. A good upgrade of small tactile switches solved the
    problems.

    John :-#)#

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)