The No.1 Website for Pro Audio
Lexicon PCM 80 PCM 90 Repairs
Old 18th December 2020 | Show parent
  #121
Lives for gear
 
Rick Dalton's Avatar
Quote:
Originally Posted by Ned Bouhalassa ➡️
Thanks for the advice! I opened up the unit and it seems to just be the faceplate that is dirty. The bad news is that I can only pry open a bit of it. I’ve made sure to take out all the screws and the 2 large knobs, and think it might just be the age of the unit, but I’m nervous to use brute strength to pry it further - tips?
Thanks a lot!
this is the pcm 80, but it looks like you'll to take that back U channel bracket to get to the...what ever is holding the faceplate. Probably an threaded standoff.
Old 18th December 2020 | Show parent
  #122
Lives for gear
 
Ned Bouhalassa's Avatar
 
🎧 10 years
Quote:
Originally Posted by Rick Dalton ➡️
this is the pcm 80, but it looks like you'll to take that back U channel bracket to get to the...what ever is holding the faceplate. Probably an threaded standoff.
Thanks for pic. I’m actually trying to take off the cover of the faceplate. It’s very thin and likely glued on in the middle section, which would explain the resistance I’m getting when I try to ply it off.
Old 18th December 2020 | Show parent
  #123
Lives for gear
 
Rick Dalton's Avatar
Quote:
Originally Posted by Ned Bouhalassa ➡️
Thanks for pic. I’m actually trying to take off the cover of the faceplate. It’s very thin and likely glued on in the middle section, which would explain the resistance I’m getting when I try to ply it off.
look at 25:52 notice the standoffs...this is pcm 70 but could be close.
Old 18th December 2020 | Show parent
  #124
Lives for gear
 
Rick Dalton's Avatar
Quote:
Originally Posted by Rick Dalton ➡️
look at 25:52 notice the standoffs...this is pcm 70 but could be close.
look in the back for a trim/emblem nut.
Old 19th December 2020 | Show parent
  #125
Lives for gear
 
Ned Bouhalassa's Avatar
 
🎧 10 years
Quote:
Originally Posted by Rick Dalton ➡️
look at 25:52 notice the standoffs...this is pcm 70 but could be close.
Thanks! It gave me the guts to pry harder (!) and I’m 80% done, but now I think I’m going down a rabbit hole. The display glass has fallen in and the buttons have fallen out. And I’m going to bet I’ll be posting about glue sometime this weekend...
Attached Thumbnails
Lexicon PCM 80 PCM 90 Repairs-2f53e6dc-9632-4793-bf95-de1353fedbe7.jpg   Lexicon PCM 80 PCM 90 Repairs-32aa8278-530f-4da8-88cb-3b3f45a07ab4.jpg   Lexicon PCM 80 PCM 90 Repairs-9cba86ce-d095-4505-9379-2a9b58253438.jpg  
Old 19th December 2020 | Show parent
  #126
Lives for gear
 
Ned Bouhalassa's Avatar
 
🎧 10 years
Update: the display glass is the culprit, so it’s not a dying display! On the negative side, the glass is actually in two parts/layers, and the gunk seems to be between the two, not on the outer parts. Now I have to take that apart?!!
Attached Thumbnails
Lexicon PCM 80 PCM 90 Repairs-fd6be518-055c-4529-85e6-f269fd012bf2.jpg   Lexicon PCM 80 PCM 90 Repairs-ab16c557-693b-4f41-aeb3-81030fa2be58.jpg  
Old 19th December 2020 | Show parent
  #127
Lives for gear
 
Rick Dalton's Avatar
Quote:
Originally Posted by Ned Bouhalassa ➡️
Thanks! It gave me the guts to pry harder (!) and I’m 80% done, but now I think I’m going down a rabbit hole. The display glass has fallen in and the buttons have fallen out. And I’m going to bet I’ll be posting about glue sometime this weekend...
Looks like you should have removed the top 3 and bottom 3 screws of that bracket..., not sure, but it looks like youre just ripping it away, plus you'll probably have to take all that apart anyway....,just to put things back together.
Old 19th December 2020 | Show parent
  #128
Lives for gear
 
Ned Bouhalassa's Avatar
 
🎧 10 years
I did unscrew 3 from the top and 3 from the bottom. No screws are being ripped out.
Old 19th December 2020 | Show parent
  #129
Lives for gear
 
Rick Dalton's Avatar
Quote:
Originally Posted by Ned Bouhalassa ➡️
I did unscrew 3 from the top and 3 from the bottom. No screws are being ripped out.
Okay. Something isn't right, as far as looking at it. I really don't think Lexicon designed these to set all the buttons inplace, before they contact cement the thing together.
Old 19th December 2020 | Show parent
  #130
Lives for gear
 
Ned Bouhalassa's Avatar
 
🎧 10 years
I think I found a hidden screw behind the Adjust and Select knobs section. Pretty hard to get to, so I may be stuck at this stage. The great news is that I know the unit is in otherwise perfect shape. The bad news is that I have to get those buttons back on!
Attached Thumbnails
Lexicon PCM 80 PCM 90 Repairs-77a34061-0f4e-4243-b9eb-cc5204794949.jpg   Lexicon PCM 80 PCM 90 Repairs-546316e3-7266-448e-b9d4-2e059b708dc7.jpg  
Old 19th December 2020 | Show parent
  #131
Lives for gear
 
Rick Dalton's Avatar
Dont get me wrong, as that being glued...is typical of what the world is coming to Example, for some time now, say you wreck your vehicle (new ford pickup) and the passenger airbag blows, you have to replace the entire F-ing dash...Not an easy task, say its an King Ranch $80,000.00 truck, the replacement dash/airbag $3,000.00, book allows 7 hours labor,,,in reality it's a two day job, because you have pussy's thats never turned a wrench I.T.F.L...., pushing the pencil. So I can see that lexicon did this so one could not service it basically.
I've an RME UFX, the display is going dim, they wont sale parts, but they'll repair it for $300.00... that was two years ago, so it may be $400.00 now.
Anyway The close I look at your pic's, it looks like the only way.
Old 24th December 2020
  #132
Gear Maniac
 
🎧 10 years
Nothing is glued here on the PCM80. Just screws here and there. Check the service manual for clues on how to take it apart. =) You need to remove all the pot. and buttonpanels to get the frontplate off.
Old 22nd February 2021 | Show parent
  #133
Here for the gear
 
🎧 5 years
PCM81 E7 error

Hi,
sorry to cross post but I have a pcm81 that power up correctly but fail the Extended DRAM test 07 with this error

07 00000000 00000000 00000000 03

Anyone can help me to debug the problem?

Thanks
Nicola
Attached Thumbnails
Lexicon PCM 80 PCM 90 Repairs-screenshot_2021-02-22-gmail-debug-lexicon-pcm81.jpg  
Old 26th March 2021
  #134
Lives for gear
 
italo de angelis's Avatar
 
🎧 10 years
Talking

I'm not sure this has been discussed and disclosed so I'm posting anyway as it could be useful for people in the years to come.

When it comes to changing the input pot of any PCM80/81/90/91 this is the original part:

AlpsAlpine 688-RK16312A0B85

easily available on Mouser and very likely on many other vendors websites.

https://eu.mouser.com/ProductDetail/...Wh%252BlmVbA==

Below find documentation!

Get a couple while they last....
Attached Files
File Type: pdf RK16-1370942.pdf (653.2 KB, 10 views)
Old 27th March 2021 | Show parent
  #135
Gear Maniac
 
🎧 10 years
Quote:
Originally Posted by italo de angelis ➡️
I'm not sure this has been discussed and disclosed so I'm posting anyway as it could be useful for people in the years to come.

When it comes to changing the input pot of any PCM80/81/90/91 this is the original part:

AlpsAlpine 688-RK16312A0B85

easily available on Mouser and very likely on many other vendors websites.

https://eu.mouser.com/ProductDetail/...Wh%252BlmVbA==

Below find documentation!

Get a couple while they last....
Thanks! Ordered 2. =)
Old 4 weeks ago | Show parent
  #136
Lives for gear
 
🎧 10 years
Quote:
Originally Posted by drifter7508 ➡️
I have changed my PCM91 display for an oled one.
Which OLED model # did you use?
Old 3 weeks ago | Show parent
  #137
Gear Maniac
 
🎧 10 years
Quote:
Originally Posted by morebutter ➡️
Which OLED model # did you use?
https://reverb.com/item/26959942-lex...t-in-the-world
📝 Reply
Post Reply

Welcome to the Gearspace Pro Audio Community!

Registration benefits include:
  • The ability to reply to and create new discussions
  • Access to members-only giveaways & competitions
  • Interact with VIP industry experts in our guest Q&As
  • Access to members-only sub forum discussions
  • Access to members-only Chat Room
  • Get INSTANT ACCESS to the world's best private pro audio Classifieds for only USD $20/year
  • Promote your eBay auctions and Reverb.com listings for free
  • Remove this message!
You need an account to post a reply. Create a username and password below and an account will be created and your post entered.


 
 
Slide to join now Processing…

Forum Jump
Forum Jump