McIntosh MCC404/MCC404M manual How to Replace the Fuses

Page 16

 

 

 

 

How to Replace the Fuses

 

 

 

 

 

 

How to Replace the Fuses

 

 

RemoveTopCoverScrews

 

 

 

If the MCC404/MCC404M produces no sound, there is no

Figure11

Illumination of the Nomenclature on the Top Glass Panel,

 

 

 

and the power connections seem secure, one or more of the

 

 

 

Amplifier Fuse(s) may have failed. Under normal operating

 

 

 

conditions your amplifier’s fuses should not fail. Failure of

 

 

 

a fuse is usually an indication of a problem. Replacing the

 

RemoveTopCoverScrews

fuse, if there is problem in the amplifier, may incur a risk

 

of further damage. Refer to figures 11, 12 and 13.

 

Caution: Disconnect the Amplifier from the Vehicle Battery

 

 

( or DC Power Supply) as Potentially Dangerous

 

 

Currents exist inside the amplifier.

 

 

1. Before accessing fuses, disconnect both the positive

 

 

and negative power cables from the DC input terminals

 

 

on the left side of the amplifier using a 5/32” hex key.

 

 

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2. Remove the Top Glass Panel by first removing the four

 

 

hex bolts with the supplied 3/32” hex key.

Figure12

 

 

 

 

 

 

3. To remove the Top Glass Panel, attach the supplied

 

 

 

suction cup to the top center of the glass panel and

 

 

 

carefully raise it high enough to put your hand under.

 

 

 

Temporarily place the removed glass panel in a safe

 

 

 

place, remove the suction cup and save it for future

 

 

 

use.

 

RemoveThreeScrews

4. Remove the Phillips Screws holding the End Caps on

 

 

 

 

both sides of the amplifier and lift the end caps off.

 

 

 

 

5. Remove the two Phillips screws located between the

 

 

 

 

low and high pass filter controls.

 

 

 

 

6. Remove all 12 crossover, equalizer and sensitivity

 

 

 

 

 

 

 

 

knobs.

 

 

 

 

7. Remove the Gold Faceplate Control Panel.

 

Locationofthefourfuses

8. Remove the fuses with needle nose pliers, taking care

 

to avoid hitting the wattmeter during removal. Do not

Figure13

lever the pliers against the wattmeter.

 

 

 

Note: To determine if the fuse has failed, examine the link

 

 

 

 

 

 

between the two fuse legs to see if it has a break in it.

 

 

 

9. Replace the fuse with one of the same type and rating

 

 

 

as unauthorized substitutions may prove hazardous to

 

 

 

you and the amplifier.

 

 

 

10. When reinserting the fuse, set it in place with the pliers,

 

 

 

then push it the rest of the way in with your finger to

 

 

 

 

avoid having the pliers slip and hit the circuit board.

 

 

 

 

11. Re-install the Gold Faceplate Control Panel and all 12

 

 

 

 

crossover, equalizer and sensitivity knobs.

 

 

 

 

12. Re-connect the power cables to the vehicle battery.

 

 

 

 

If the replacement fuse(s) fails again, have the amplifier repaired at a McIntosh Service Center.

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Contents MCC404M Owner’s ManualInstallation GeneralConnection Care of EquipmentCustomer Service McIntosh MCC404 AmplifierThank You Please Take a MomentTable of Contents Performance FeaturesGeneral Notes IntroductionDimensions TopViewoftheMCC404/MCC404MInstallation Amplifier VentilationRemoving the Glass Panel Removing the End CapsSide Panel Cooling and Connections Subwoofer OutputsHow to Connect for Four Channels McIntosh Control CenterHow to Connect for Three Channels Careful to observe the correct polaritiesHow to Connect for Two Channels How to Connect with Subwoofer Channel Top Panel Controls, Display and Switches CH 3-4 SensitivityHow to Operate the MCC404/MCC404M Introduction Power Output ModeInput Source Sensitivity ControlsHow to Operate in Subwoofer Mode How to Replace the Fuses How to Replace the FusesMCC404/MCC404M Block Diagram Specifications Packing Instructions

MCC404/MCC404M specifications

The McIntosh MCC404 and MCC404M amplifiers are a testament to the brand's dedication to producing high-fidelity audio equipment that meets the demands of even the most discerning audiophiles. With their robust design and cutting-edge technologies, these amplifiers offer exceptional sound quality and performance, making them ideal for both home audio systems and professional setups.

Both the MCC404 and the MCC404M feature a powerful quad amplifier design, which allows them to deliver an impressive output of 400 watts per channel into 8 ohms, making them capable of driving a wide range of speakers with ease. This output is not only powerful but also highly controlled, providing crystal-clear sound reproduction across the frequency spectrum. The incorporation of McIntosh’s Power Guard technology ensures that distortion is minimized, safeguarding your speakers while delivering a pristine audio experience.

One of the standout features of these amplifiers is their advanced thermal management system. McIntosh has integrated a sophisticated cooling design that prevents overheating, ensuring the amplifiers function optimally, even during extended listening sessions or when driving demanding loudspeakers. This technology is crucial for maintaining the longevity and reliability of the units.

The build quality of the MCC404 and MCC404M is exemplary, reflecting McIntosh's commitment to craftsmanship. Each unit showcases the iconic McIntosh blue watt meters, which not only serve a functional purpose by providing real-time power output readings but also enhance the aesthetic appeal of the equipment. The chassis is constructed with high-grade materials, ensuring durability while minimizing resonance for cleaner sound delivery.

Included in the design are multiple input options, making integration into various audio setups convenient. The amplifiers feature both balanced and unbalanced inputs, accommodating a range of source components. Additionally, the MCC404M variant includes McIntosh’s unique Quad Balanced output stage, providing enhanced sound quality and reduced noise, further elevating the listening experience.

In conclusion, the McIntosh MCC404 and MCC404M amplifiers stand out in the audiophile market with their superior output, advanced technologies, and supreme build quality. Whether used in a home theater environment or a professional studio, these amplifiers deliver an unparalleled audio experience, ensuring that every note and nuance is heard as intended. McIntosh has once again proven its dedication to excellence, making these amplifiers a worthy investment for anyone serious about high-quality sound.