Appendix; Faults And Warnings Overview - Lab.gruppen PLM series Operation Manual

11. Appendix

11.1 Faults and Warnings Overview

The various fault or warning conditions that may arise in the PLM are indicated by the tricolor LEDs in
the eight soft function buttons around the display. Because each LED indicates several types of faults or
warnings, a brief textual description of the fault or warning type is given on the display adjacent to the soft
button(s).
Sections 9.10.2 and 9.11 detail all the warning and fault indications.
Table 11.1 provides additional explanation of what problems the PLM might have encountered to give rise to
the each of the fault or warning conditions. Note that some of the conditions give rise to both a warning and
a fault indication; in these cases the warning is given by a yellow LED indication as the operating parameter
in question approaches the safety threshold, with the fault state being indicated by the LED turning red
when the threshold is actually reached (with a mute being applied in some cases).
Warning, Fault, Clip and Mute indications, listed alphabetically by Displayed Text
Displayed Text Event Log Text
AMP CH. MUTE Amp Channel Mute
AUDIO FAULT Frame Fault: Audio
Interface
CAL ACTIVE n/a
CTRL OFFLINE Frame Offline
CURRENT CLIP n/a
INPUT CLIP n/a
LM PREC. LOW Speakersafe
precision low
LOAD NOT VER LoadSmart: Load Not
Verified
MOD. IN MUTE Module Input Mute
MOD. OUT MUTE Module Output Mute
MODULE CLIP n/a
n/a Frame Fault: No Input
Source
n/a LoadSmart verification
NO LOAD Channel Fault: No Load
Detected
Category Type
Mute Amplifier Mute
status
Fault Audio interface fault
Fault Current Average Limiter
Warning Controller/Frame offline
Clip Current Protection active
Clip Input clip
Warning SpeakerSafe precision
low
Warning Load not verified
Mute Module Input Mute
status
Mute Module Output Mute
status
Clip Module Output clip
Fault No input source
Event LoadSmart active
Fault No load
PLM Series Operation Manual rev 1.1.3
11. Appendix
Description
The audio signal has been muted in the power
output stage.
An internal audio fault has arisen and the unit needs
servicing.
Ensures that the PLM's power output stages are not
overloaded. This should never happen during normal
program material.
The PLM is no longer able to communicate with the
Dolby Lake Controller.
PLM's power output stage current has exceeded
the fixed safe maximum and the Current Peak
Limiter has become active to limit it.
The input signal level is too high and is causing
clipping at the input stage
A SpeakerSafe warning indicating insufficient data
to produce reliable results. This may occur, for
example, if a channel is being driven at a very low
level.
A Module containing a Fingerprint has been loaded,
but the load is yet to be verified with LoadSmart.
The audio signal has been muted at the Module
input of the Dolby Lake processor.
The audio signal has been muted in the output stage
of the Dolby Lake processor.
The signal level on the outputs of the Dolby Lake
processing module is too high and is clipping.
The chosen input type has been deselected or lost
and the input type selector has no alternative input
sources in the priority list.
LoadSmart load verification is in progress
No load detected at the power output channel.
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