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  1. Jerome
  2. CP88-CP73 Stage Piano
  3. Friday, 15 May 2020
I upgraded my CP73 with 1.31. I got « checksum error » message at the end.
When I restart my CP73 the new version is 1.31 and seems ok.
I retried the upgrade 3 times, I got same result.

Is anything wrong ? firmware ? sound waves data ?
Responses (4)
Bad Mister
Yamaha
Accepted Answer Pending Moderation
Curious. Please describe exactly the process.

When the update is completed, the CP73 screen should report the version it installed and “Completed. Please turn off.” or it reports “N/G” indicating the updater failed... No Good.

You are reporting that your CP73 screen is reporting “Checksum error” — is that exactly what is happening?
You do not see “Completed. Please turn off.”
You do not see “N/G”?
Your CP73 screen reads “Checksum error”

Forgive me for these questions but that’s not a response it should be showing under the updater routine.
  1. more than a month ago
  2. CP88-CP73 Stage Piano
  3. # 1
Accepted Answer Pending Moderation
I made an new attempt.
While "Updating Wave 22/22", between 20-30%, the screen reports "Check Sum error!".
I wonder if the update files may have been corrupted somehow, but I downloaded them twice...
Attachments (1)
  1. more than a month ago
  2. CP88-CP73 Stage Piano
  3. # 2
Bad Mister
Yamaha
Accepted Answer Pending Moderation
Perhaps your thumb drive has a corrupted sector.
Your instrument reports it is updated... already.
  1. more than a month ago
  2. CP88-CP73 Stage Piano
  3. # 3
Accepted Answer Pending Moderation
Problem solved ! The only change I did was to copy the file 8S89OS_.PGM from a PC to the usb key (was copied from Mac).
I got "Completed. Please turn off."

I suspect a usb key formated on CP (File Utility/Format) may causes some quirks on Mac... may be...
Attachments (1)
  1. more than a month ago
  2. CP88-CP73 Stage Piano
  3. # 4
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