Section 3: Operation- Fuse Replacement

FUSE REPLACEMENT

If the CM16a does not power-up when the POWER switch is in the “on” position (POWER indicator LED does not illuminate) check the source of AC power and the connection of the power cord at the outlet and IEC receptacle ends. If the AC source is “on” and the power cord is connected and in good condition, then the condition of the fuses should be checked.

The fuse holder is an integral part of the IEC connector. It contains two fuses.

•To replace a fuse, first detach the AC power cord from the CM16a.

•Then use a flat-blade screwdriver to pry the fuseholder out, as shown at left.

The fuses are held in the round openings in the end of the fuseholder as shown at left, below. Replace one or both fuses with the same type: 20 × 5 mm, 2 amp, 250V.

A visual inspection of the fuse will usually indicate if the fuse has been “blown” or not. This method is not foolproof, however, as sometimes the fuse element is severed close to the end-cap making it impossible to see the break. When in doubt,

test the fuse with an ohmmeter or just replace the fuse. Below is an illustration of a typical clear glass-cartridge fuse. The “GOOD” fuse has an intact element from end to end and the “BAD” (or blown) fuse has a break in the element.

If the CM16a continues to “blow” fuses, DO NOT INCREASE THE FUSE RATING as severe damage to the CM16a could result. Contact QSC for service if fuses repeatedly blow.

If fuse replacement does not enable the CM16a to power up, double-check the AC power source and the cord assembly before returning the unit for possible repair.

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QSC Audio CM16a manual Operation- Fuse Replacement
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CM16a specifications

The QSC Audio CM16a is a versatile and powerful amplifier designed to meet the demands of professional audio applications. Known for its reliability and performance, the CM16a is ideal for both live sound and installation scenarios, offering a perfect blend of advanced technology and user-friendly features.

One of the standout features of the CM16a is its Class D amplifier architecture. This technology ensures not only high efficiency but also a lightweight design, making it easier to transport and install in various settings. The amplifier delivers an impressive output power of 1600 watts at 4 ohms, providing ample headroom for demanding audio applications. The CM16a is capable of handling multiple speaker configurations, making it a flexible choice for various setups.

Another key characteristic of the QSC CM16a is its advanced thermal management system. This built-in feature ensures the amplifier operates within safe temperature limits, enhancing reliability and extending the lifespan of the unit. The CM16a also includes an intelligent protection circuit that safeguards the amplifier from overload and short circuits, allowing users to operate it confidently even during intense performances.

The CM16a comes equipped with multiple inputs and outputs, including XLR and TRS connectors, enabling seamless integration with a range of audio sources and systems. This versatility allows for easy connection to mixers, microphones, and instruments, making it suitable for diverse applications from concerts to corporate events.

In addition to its robust performance, the QSC CM16a features an intuitive front panel design with LED indicators for quick monitoring of system status and performance. Users can easily adjust levels and settings, ensuring optimal audio quality for any given situation.

The amplifier is also designed with efficiency in mind, incorporating Power Factor Correction (PFC) technology. This enhances power usage, reducing operational costs while minimizing environmental impact.

In conclusion, the QSC Audio CM16a stands out as a premier choice for audio professionals seeking a reliable, high-performance amplifier that can deliver exceptional sound quality. With its Class D technology, advanced protection features, versatile connectivity, and user-friendly design, the CM16a is a worthy investment for any audio application. Whether for live sound reinforcement or permanent installations, the CM16a promises to meet the needs of even the most demanding audio environments.
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