DSP7000 No Inputs Meter Pegged

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- July 2, 2020 at 6:14 pm #115993
  buck khrysis
  Hello
  
  I recently found a fault with my DSP7000.
  Neither analog or digital inputs work.
  When set to analog inputs the level meter is maxed even with nothing connected. On digital inputs the meter doesn’t light when signals present.
  
  Any ideas what went wrong?
- July 2, 2020 at 8:23 pm #155291
  nickrose
  Moderator
  Eventide Staff
  It sounds like an internal power supply problem.
  
  But, you could try a completeb re-initialization (see UM) before worrying.
- July 3, 2020 at 4:35 pm #155303
  buck khrysis
  The manual didn’t have an init procedure but there was a setup process. The same thing?
  I tried the setup process but it didn’t change anything. Still the same exact problems as before.
- July 3, 2020 at 4:55 pm #155304
  buck khrysis
  I opened the unit and immediately noticed that L501 is busted.
  
  Anyone know its value or P/N?
- July 3, 2020 at 4:59 pm #155305
  nickrose
  Moderator
  Eventide Staff
  Sorry – sounds like a fault in the analog power supply.
  
  Either you should send it for service or have a local tech take a look.
  
  Just seen your picture – it is L1501, which is, wait for it, part of the analog power supply. Its value is 470uH
  
  Unfortunately I don't have the manufacturers part number, but anything that will handle 100-200mA should be OK.
  
  Be aware that it might go again, since you don't know what broke it. Let's hope it was a faulty part.
- July 4, 2020 at 12:32 am #155307
  nickrose
  Moderator
  Eventide Staff
  Sorry – my magic powers are not what they were.
  
  There may well be more damage, or you could be lucky.
- July 10, 2020 at 4:40 pm #155329
  buck khrysis
  It ain’t purdy but it works. Found the same value inductor on EBay with 260 ma rating. Tack soldered it to what remains of the original. Powered the unit up and problems are gone. Gonna glop it over with hot glue if I find it doesn’t generate any serious heat after running a few hours.
  
  Thanks very much for your help!
- July 3, 2020 at 6:53 pm #155306
  buck khrysis
  nickrose wrote:
  
  Sorry – sounds like a fault in the analog power supply.
  
  Either you should send it for service or have a local tech take a look.
  
  Just seen your picture – it is L1501, which is, wait for it, part of the analog power supply. Its value is 470uH
  
  Unfortunately I don't have the manufacturers part number, but anything that will handle 100-200mA should be OK.
  
  Be aware that it might go again, since you don't know what broke it. Let's hope it was a faulty part.
  
  The box this unit was shipped in has big gouge in it. Probably a case of rough shipping.
  I can replace the inductor but what about components downstream of this regulator? Would anything release magic smoke due to this failure?
- July 10, 2020 at 4:44 pm #155330
  nickrose
  Moderator
  Eventide Staff
  buck khrysis wrote:
  
  It ain't purdy but it works. Found the same value inductor on EBay with 260 ma rating. Tack soldered it to what remains of the original. Powered the unit up and problems are gone. Gonna glop it over with hot glue if I find it doesn't generate any serious heat after running a few hours. Thanks very much for your help!
  
  Good work ! Hope your glop is purdy.
- July 10, 2020 at 10:09 pm #155331
  buck khrysis
  nickrose wrote:
  
  buck khrysis wrote:
  
  It ain't purdy but it works. Found the same value inductor on EBay with 260 ma rating. Tack soldered it to what remains of the original. Powered the unit up and problems are gone. Gonna glop it over with hot glue if I find it doesn't generate any serious heat after running a few hours. Thanks very much for your help!
  
  Good work ! Hope your glop is purdy.
  
  Glop all over the avionics keeps Navy fighters in the air. All glop is purdy.
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