SRVO-074: LDAL alarm (pulse coder LED broken)
The LED inside the optical encoder has failed - the encoder can no longer read its own disc.
What it means
The LED inside the optical encoder has failed - the encoder can no longer read its own disc. No troubleshooting ladder on this one; it's a hardware death certificate.
Common causes
Ranked by what technicians most often find, most likely first.
- Failed LED in the pulse coder. That's the list.
How to fix it
- Replace the pulse coder (motor), then perform mastering. Power-cycle to clear.