Troubleshooting; Amplifier Fails To Exit Standby Mode Promptly; Amplifier Enters Standby Mode Too Early - Extron electronics MPA 152 Plus User Manual

Stereo to Dual Mono
Toggle Switch
Figure 10. Front View, Showing the Location of Resistor R42
4. Identify resistor R42 at the front of the bottom circuit board between the STEREO to DUAL MONO toggle
switch (to the left) and the LEVEL potentiometer (to the right). The resistor is shown in the white box in figure
10.
5. Remove the resistor using a pair of diagonal cutters to clip the wires attaching it to the circuit board.
6. Re-attach the top enclosure with the four screws removed in

Troubleshooting

Under different circumstances, the front panel LED lights green or amber to provide diagnostic information.

Amplifier Fails to Exit Standby Mode Promptly

Power LED Color
Amber
Green
Green or Amber

Amplifier Enters Standby Mode Too Early

Power LED Color
Green or Amber
Level Potentiometer
Resistor R42
Problem Description
No output signal.
No output signal.
Slow to exit standby mode
when a signal is present.
Problem Description
Enters standby mode early.
step 2 (see page 13).
Problem Solution
No input detected: verify that there is an input signal.
If a signal is present, raise the level of the source signal.
The amplifier may be in mute mode. Check the Remote
port.
The input signal may be too weak. Raise the level of the
source signal.
Problem Solution
The input signal may be too weak. Raise the level of the
source signal.
MPA 152 Plus • Operation 14