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6 QUICK GUIDE OVERVIEW
6.1 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
convenient label strip with writing surface is
provided adjacent to each level potentiometer.
To remove the dust-filter covers, loosen the thumb-
screws located underneath the front handles. This
allows 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.
6.1.1 Front
The front panel LED area includes the following
indicators per channel:
VHF - Very High Frequency protection active (output
muted) (Red constant)
TEM - Temperature mute (Red constant)
MUTE - Channel muted due to a fault condition (Red)
CPL - (yellow constant with output muted):
Low impedance/short circuit detection fault
VPL - Voltage Peak Limiter (VPL) active
SIG - Signal levels - 40dB (Sig) to -4dB
Hi-IMP - High-impedance/open load detected (Re
- When no VPL, CPL or PAL indicators are
illuminated, and the VPL DIP-switch is set to
maximum at the specified nominal load, the
amplifier channel is able to deliver maximum
rated output power.
(PWR) Power on (Blue).
- It's normal for the LED to illuminate "BLUE" during
power on.
Zenith 10K4 Amplifier Manual
11
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