AP20 Installation and Operating Guide Page 21
AP20 Installation & Operating Guide Document # 9301H39200 Ver. 1.25
1.5 Troubleshooting (Operation)
The following table provides troubleshooting data for the AP20.
PROBLEM SOLUTION
AP20 will not power ON Press and release the power button on the front panel. If the
unit will not power up, be sure the rear panel power switch is
ON and the unit is plugged into a working AC outlet protected
by a surge protector. See Powering ON the AP20 Processor,
pag
e 16.
If the AP20 is mounte
d in a rack and a breaker is used for the
rack, make sure the breaker is ON.
Verify the surge protector is powered and is working.
Try changing the AP20 power cord.
If power is getting to the AP20 but it still will not power ON,
maybe the fuse above the AC In connector (on the rear panel)
is blown. Call a theater technician to check it.
AP20 front panel display is too
dim
The front panel display automatically dims when not touched for
a few seconds. Gently touch the display screen to brighten it.
No sound in auditorium On the front panel display, verify the Mute button is not muted.
If it is muted, touch it to unmute it.
Be sure the fader level is not zero (0) or red. If it is zero, then
turn the knob to increase the volume. If it is red, then unmute
the AP20 by touching the Muted button.
Verify the AP20 is in the correct format.
Volume is too low or high in the
auditorium
Turn the fader knob to achieve proper volume.
Volume is too low or high in the
booth
Touch the Monitor button to open the Monitor window, then
touch the + or – to adjust the monitor volume.
No sound in booth Verify the Monitor is not muted (red). To unmute, touch the
Monitor button, then touch the red Muted button.
Verify a powered speaker is connected to the AP20 rear panel.
Verify the speaker’s power is ON.
Adjust the monitor volume (see previous entry).
Check monitor mix menu (see section 1.4.2)
Wrong sound in auditorium Verify the AP20 is in correct format. (The current format is
highlighted in the bottom row of the display.) Touch a different
format to select. If the format you want is not listed, it has not
been set up – contact your theater technician.
Front panel fader not functioning Use touch screen work around until fader can be repaired (see
section 5.2) and contact your theater technician.
1.5.1 Over Temperature Alert
If the internal temperature of the AP20 reaches a critical level of 50°C or greater, a red flashing alert
indicator will appear.
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