How to troubleshoot no sound from Marantz MM7055 Amplifier speakers?
If you're not getting any sound from the speakers connected to your Marantz Amplifier, verify the speaker connections and the connections to other devices. Also, make sure that the input selector matches the input connector (BALANCED or UNBALANCED) of the connected device.
Why does my Marantz MM7055 Amplifier power off suddenly during use?
If your Marantz Amplifier suddenly switches off during use, and the STANDBY and protection indicators are flashing, it's likely due to the unit's internal temperature increasing and activating the protective circuit. To resolve this, unplug the power cord from the wall, allow the unit to cool down, and then plug it back in. Ensure the amplifier is in a well-ventilated area and that you are using speakers with the correct impedance. Also, check the speaker cables to make sure the core wires are not touching each other or the rear panel of the unit. If they are, remove the power plug, fix the wiring, and reconnect. Additionally, reduce the volume of any connected amplifiers before plugging the unit back in.
How to fix a Marantz MM7055 that won't turn on?
If your Marantz Amplifier isn't powering on, or switches off immediately after being turned on, first ensure that the power plug is correctly inserted into the wall socket. If that's not the issue, the protective circuit may have been triggered. Unplug the power cord from the wall socket, wait at least one minute, and then plug it back in.
What to do if Marantz MM7055 switches off with flashing standby indicator?
If your Marantz Amplifier suddenly switches off during use and the STANDBY indicator flashes quickly while the protection indicator flashes at a slower rate, the protective circuit has been activated. Unplug the amplifier from the wall socket, carefully re-examine the unit's installation, and inspect the speaker cable connections. If the problem persists after switching the power back on, contact the Marantz Service Center.
General| Output level | 2.4 mV |
|---|---|
| Damping factor | 100 |
| Amplifier class | - |
| Frequency range | 20 - 20000 Hz |
| Output impedance | 30000 Ω |
| Input sensitivity | 1.2 mV |
| Audio output channels | 5.0 channels |
| Peak power per channel | 170 W |
| Signal-to-Noise Ratio (SNR) | 105 dB |
| Total Harmonic Distortion (THD) | 0.03 % |
| Dynamic power per channel (8 Ohm) | 140 W |
| XLR in | Yes |
| Audio (L/R) in | 5 |
| Speakers connectivity type | XLR |
| Material | Metal |
| Product color | Black |
| Connectivity technology | Wired |
| Power consumption (standby) | 0.4 W |
| Power consumption (typical) | 440 W |
Weight and Dimensions| Depth | 384 mm |
|---|---|
| Width | 440 mm |
| Height | 184.5 mm |
| Weight | 15200 g |
Warning against opening the unit to prevent electric shock.
Caution to protect the appliance from rain or moisture.
Warning about hot surfaces and not touching them.
Guidelines for proper installation and heat dispersal.
Checks before turning power on and general handling.
Guidelines for balanced/unbalanced audio and speaker cable connections.
Illustrates connecting to AV7005 for various surround playback modes.
Step-by-step guide for unbalanced connections to AV7005.
Step-by-step guide for balanced connections to AV7005.
Solutions for power not switching on or shutting off quickly.
Troubleshooting steps for lack of audio output from speakers.
Diagnosing and resolving unit shutoff during operation.
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