PLM Series Operation Manual rev 1.1.3
11. Appendix
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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
Category Type
Description
AMP CH. MUTE
Amp Channel Mute
Mute
status
Amplifier Mute
The audio signal has been muted in the power
output stage.
AUDIO FAULT
Frame Fault: Audio
Interface
Fault
Audio interface fault
An internal audio fault has arisen and the unit needs
servicing.
CAL ACTIVE
n/a
Fault
Current Average Limiter
Ensures that the PLM’s power output stages are not
overloaded. This should never happen during normal
program material.
CTRL OFFLINE
Frame Offline
Warning
Controller/Frame offline
The PLM is no longer able to communicate with the
Dolby Lake Controller.
CURRENT CLIP
n/a
Clip
Current Protection active
PLM’s power output stage current has exceeded
the fixed safe maximum and the Current Peak
Limiter has become active to limit it.
INPUT CLIP
n/a
Clip
Input clip
The input signal level is too high and is causing
clipping at the input stage
LM PREC. LOW
Speakersafe
precision low
Warning
SpeakerSafe precision
low
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.
LOAD NOT VER
LoadSmart: Load Not
Verified
Warning
Load not verified
A Module containing a Fingerprint has been loaded,
but the load is yet to be verified with LoadSmart.
MOD. IN MUTE
Module Input Mute
Mute
status
Module Input Mute
The audio signal has been muted at the Module
input of the Dolby Lake processor.
MOD. OUT MUTE
Module Output Mute
Mute
status
Module Output Mute
The audio signal has been muted in the output stage
of the Dolby Lake processor.
MODULE CLIP
n/a
Clip
Module Output clip
The signal level on the outputs of the Dolby Lake
processing module is too high and is clipping.
n/a
Frame Fault: No Input
Source
Fault
No input source
The chosen input type has been deselected or lost
and the input type selector has no alternative input
sources in the priority list.
n/a
LoadSmart verification
Event
LoadSmart active
LoadSmart load verification is in progress
NO LOAD
Channel Fault: No Load
Detected
Fault
No load
No load detected at the power output channel.
