Troubleshooting, About Protective Circuits

ENGLISH

TROUBLESHOOTING

If you experience trouble with the PM-11S1, make the below checks before thinking the worst. Improper operation can cause the PM-11S1 to behave in a way that makes you think something is wrong with the equipment when actually not. If the trouble cannot be fixed after making the below checks, contact the place of purchase, your nearest Marantz dealer, our customer service center or our repair service center.

* Power does not turn ON.

1.Is the power cable securely plugged into a power outlet?

2.If the OPERATE indicator on the display is flashing a red color, a protective circuit has tripped. Shut power OFF, wait a few minutes and then reactivate the power.

* Nothing is heard from the speakers.

1.Aren’t the SPEAKER A and B buttons on the front panel in the OFF position?

2.Isn’t the attenuation feature (ATT) active?

3.Isn’t there trouble in the input source selected from the INPUT SELECTOR knob on the front panel?

4.Are you using the player (replaying device) correctly?

5.Are connection cables and speaker cables securely connected?

6.Volume may have been muted by a protective circuit that tripped. Try adjusting the volume level again.

7.If an error message is displayed, correctly set the ID number as indicated in the table under “Error Messages”.

*Volume level differs between left and right channels.

Volume, bass and treble level may be trimmed differently for the left and right channels. Try trimming again.

* Stereo sound is not heard from the speakers.

The operating mode switch on the rear panel may be set to “BI-AMP”. Shut power OFF, set the switch to “STEREO” and then reactive the power. Power must be activated after the operating mode switch is set for the setting to be active.

*Record player audio is not heard or contains a lot of noise.

1.Is the PHONO MC button on the front panel set to the type of cartridge you are using?

2.Are connection cables securely connected?

3.Is the grounding wire from the record player connected to the PHONO GND terminal?

4.Is the cartridge properly connected to the tone arm?

7About Protective Circuits

The PM-11S1 is equipped with protective circuits to protect the amplifier circuits and speaker system against damage. If a protective circuit trips, the sound is instantly muted. In this case, either “PROTECT” flashes on the display or the display panel goes out and the OPERATE indicator on the display flashes a red color.

•At Power ON

For about 8 seconds after power is activated, a protective circuit trips and mutes the sound to give amplifier circuits time to stabilize. Once the amplifier circuits stabilize, the protective circuit releases and audio is enabled.

•In the Event of Overcurrent

A protective circuit trips if current of a certain level is detected, which can happen if excessive signal flow is input to the amplifier or if the PM-11S1 is connected to a speaker system of less than 4 Ω impedance. A protective circuit can also trip if a speaker cable accidentally shorts. In these cases, “PROTECT” flashes on the display and, approximately 8 seconds later, the sound is automatically muted and the protective circuit is released. Therefore, readjust the volume level to resume normal use.

If overcurrent is detected because of trouble with the amplifier, the OPERATE indicator on the display flashes a red color and power shuts OFF.

•If Strong Bass Signals Are Input

A protective circuit trips if bass signals of an excessive level are detected. In this case, “PROTECT” flashes on the display and, approximately 8 seconds later, the sound is automatically muted and the protective circuit is released. Readjust the volume level to resume normal use. If these strong bass signals continue or if excessive DC voltage is detected because of trouble with the amplifier, the OPERATE indicator on the display flashes a red color and power shuts OFF.

•If the Power Amplifier Overheats

A protective circuit trips if the temperature of the main amplifier rises above a certain level, which can happen if excessive signal flow is continually input into the amplifier. Temperature can also exceed the trip level of the protective circuits if the vents on the top of the PM-11S1 are covered or if the PM- 11S1 is installed on a cramped audio rack. In these cases, “PROTECT” flashes on the display and, when the temperature inside the unit lowers, the sound is automatically muted and the protective circuit is released. Readjust the volume level to resume normal use. If the temperature does not sufficiently lower within a certain amount of time after the protective circuit trips, the OPERATE indicator on the display flashes a red color and power shuts OFF.

•In the Event of Amplifier Trouble

A protective circuit trips and automatically shuts OFF the power if abnormal voltage is detected in the power circuit for whatever reason. The same happens if the main fuse inside the amplifier blows. In these cases, the OPERATE indicator on the display flashes a red color.

PM-11S1 specifications

The Marantz PM-11S1 is a high-performance integrated amplifier that embodies the brand's commitment to delivering exceptional audio quality and craftsmanship. Launched as part of Marantz’s premium series, the PM-11S1 is designed to meet the demands of audiophiles and music enthusiasts alike.

At the heart of the PM-11S1 is its robust amplification system, delivering a powerful 100 watts per channel into 8 ohms. This ensures that it can drive a wide range of speakers, providing dynamic and distortion-free sound across various music genres. The amplifier features a fully discrete design, eliminating the use of integrated circuits in critical signal paths, which helps to maintain audio purity and integrity.

One of the standout technologies employed in the PM-11S1 is the Advanced Current Feedback topology. This unique design allows for a wide frequency response and a fast transient response, making it capable of reproducing even the most intricate musical passages with clarity and precision. Furthermore, the amplifier is equipped with a high-quality phono stage, supporting both moving magnet and moving coil cartridges, which allows vinyl enthusiasts to experience their records with exceptional fidelity.

The PM-11S1 also boasts a wide array of connectivity options, including multiple analog inputs, digital inputs for both coaxial and optical signals, and a dedicated balanced XLR input. This versatility makes it compatible with a variety of sources, including CD players, streaming devices, and home theater systems. Additionally, it features a headphone output with a dedicated amplifier, providing a private listening experience without compromising on sound quality.

The build quality of the PM-11S1 is equally impressive, featuring a solid, elegantly designed chassis that minimizes vibrations and internal interference. This not only enhances the overall aesthetics but also contributes to the amplifier's durability and longevity. The front panel includes large, easy-to-use knobs and a clear display, ensuring intuitive operation.

In summary, the Marantz PM-11S1 is a superb integrated amplifier that combines power, versatility, and high-fidelity sound reproduction. With its advanced technologies, robust construction, and thoughtful design, it is a worthy addition to any high-end audio system, providing an unparalleled listening experience that honors the nuances of every musical performance.