Front Panel Overview - DAD FZ10004 User Manual

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1.3 FRONT-PANEL OVERVIEW
The amplifier's front panel presents the performance and fault condition indicators, power and remote
switches, and a removable dust-filter cover. Level potentiometers provide individual attenuation for the
amplifier channels. Range is 0dB to - infinity. (The 12 o'clock position indicates -10dB attenuation.) A con-
venient label strip with writing surface is provided adjacent to each level potentiometer.
To remove the dust-filter covers, loosen the thumbscrews located underneath the front handles. This al-
lows removal of the dust-filters for cleaning. The covers may be made tamper resistant by replacing the
thumbscrews with Philips head or safety Torx screw. Thread size is M3.
The amplifier never should be operated without the dust-filters in place.
Front
The front-panel LED area includes the following indicators per channel:
HI - IMP
SIG -20
• VHF - Very High Frequency protection active (output muted) (Red constant)
• TEM - Temperature mute (Red constant)
• MUTE - Channel muted due to a fault condition(yellow)
• C P L - (yellow cons tant with output muted): Low impedance / short circuit detection fault
• VL - Voltage Limiter (VL) active
• S IG - Signal levels - 40dB (Sig) to -4dB
• Hi-IMP - High-impedance/open load detected (Red)
When no VL, CPL or PAL indicators are illuminated, and the VL DIP-switch is set to maximum at the speci-
fied nominal load, the amplifier channel is able to deliver maximum rated output power.
It's normal light has been shown "BLUE" during power on.
FZ10004
-15 -10
POWER
(PWR) Power on (BLUE)
-4 VL CPL
MUTE
VHF
TEM
Fig.1 - Front-panel LED area
Fig.2 - Power LED