Sony HDCAM HDW-730 Operation Manual page 61

VTR operation and status indicators
Warning indicators
RF: Lights if the recording heads are clogged.
SERVO: Lights if the servo motor fails.
HUMID: Lights if condensation is on the drum.
SLACK: Lights if the tape is not winding properly.
For more information, see "6-3 Operation Warnings" on page 6-14.
Note
If the tape in the VTR becomes slackened, an error code appears
automatically on the display section of the display panel.
For more information refer to the Maintenance Manual.
Lights during playback.
VTR operation and status indicators
Chapter 2 Locations and Functions of Parts and Controls
2
2-43