Gebruiksaanwijzing /service van het product N33H van de fabrikant Mark Levinson
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Owner’ s Manual Nº33H Monaural Power Amplifier.
1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water . 6. Clean only with a dry cloth. 7. Do not block ventilation openings. Install in accordance with the manufacturer’ s instructions.
FCC Notice This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
iii Documentation Conventions This document contains general safety , installation, and operation instructions for the Nº33H Power Amplifier . It is important to re ad this document before attempting to use these components. Pay particular attention to safety instructions.
1 T able of Contents Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Opening the Shipping Crate . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Moving the Nº33H . . . . . . . . . . . . . . . . . . . . .
2 Unpacking W arning! DO NOT attempt to lift or move the Nº33H without adequate assistance. Failur e to follow the procedur es included in this owner’ s manual may r esult in personal injury and/or product damage. The shipping weight of each Nº33H Monaural Power Amplifier is approximately 220 pounds (100 kg).
3 4. Use a socket wrench to remove: • The four 9/16-inch hexagonal-head bolts that secure the Nº33H to the base of the crate. These bolts attach directly to the bottom of the Nº33H’ s feet and are accessible underneath the pallet on which the Nº33H sits.
4 Installation Considerations The Nº33H requires special care during installation to ensure optimal performance. Pay particular attention to the information included in this section. Placement Y our Mark Levinson Nº33H Monaural Power Amplifiers are specifi- cally designed to stand on the floor , and must be used as free- standing units.
5 • DO NOT place the Nº33H on a thick rug or carpet or cover the Nº33H with a cloth, as this might prevent proper cooling. • DO NOT expose the Nº33H to high temperatures, humidity , steam, smoke, dampness, or excessive dust. A void installing the Nº33H near radiators and other heat-producing appliances.
6 Note Building r egulations and electrical codes differ from location to location, making it impossible to anticipate the r equire- ments of high-curr ent AC circuits such as the Nº33H.
7 Special Design Featur es While the Nº33H Monaural Power Amplifier is straightforward in everyday use, it includes several design features that are responsi- ble for its outstanding performance.
8 Fully Balanced Design A truly balanced input topology eliminates the need for an input buffer amplification stage, allowing the first stage differential amplifier to be driven directly by the source. Matched impedances are presented to the source and both signals travel through identical circuit paths.
9 cycle the amplifier with the ~ac mains r elay switch on the rear panel. In addition, the AC input to each transformer is fused to protect against excessive current conditions such as driving shorted outputs.
10 Fr ont Panel REFERENCE MONAURAL AMPLIFIER Nº 33H 2 1 1. standby button When power is first applied to the Nº33H power amplifier , and assuming the rear panel AC mains switch is set to its on posi- tion, the amplifier remains completely off. Press the front panel standby button to bring the amplifier from completely off to standby .
11 Caution! Befor e making any connections, turn the master volume on the associated pr eamplifier all the way down, then power off the N º 33H and all associated components and disconnect them fr om electrical outlets. 1. ~ac mains Provides power to the Nº33H when the power cord is connect- ed to an electrical outlet.
12 2. ~ac mains r elay switch The AC mains switch turns the amplifier completely off by disconnecting the supervisory power supply from the AC mains. Since this small supervisory supply controls the main power supply access to AC power , shutting down the super vi- sory power supply also disconnects the main supply from AC.
13 5. loudspeaker binding posts (outputs) Provide audio output. T wo pair of custom-made, gold-plated, high-current binding posts labeled + (positive) and – (nega- tive) are included. Positive binding posts are red; negative binding posts are black.
14 6. slave in & slave out communication ports Provide “ links ” to compatible Mark Levinson preamplifiers and power amplifiers, allowing the N º 33H and linked preamplifiers or power amplifiers to share Link controls. T wo 6-pin modular RJ-11 jacks labeled slave in and slave out are available.
15 Linking Linking is available for all Mark Levinson components that offer Link or communication ports, including master , slave in , slave out, , input, and contr ol communication ports. These communication ports can be used to “ link ” compatible Mark Levinson components in a slave chain, allowing them to share Link controls.
Cr eating a Slave Chain Making Link connections creates a slave chain that facilitates communication among linked components, allowing them to share certain controls. All slave chains: • Must include compatible Mark Levinson components. The N º 33H is compatible with the components listed on the previous page.
17 • Must include components that are connected in a certain order to prevent communication from terminating. Power amplifiers such as the N º 33H must be the last components in a slave chain. Note The slave chains in this section include pr eamplifiers and power amplifiers.
18 slave out N º 320S Pr eamplifier Step A: Connect the (slave out) communication port on the preamplifier to the slave in communication port on the first N º 33H N º 33H Monaural Amplifier Step B: Connect the slave out communication port on the first N º 33H to the slave in communication port on the second N º 33H.
19 Link Contr ols Linking Mark Levinson components allows them to share certain controls. The table below provides a general description of controls the N º 33H shares with other linked components. Some controls may not be available for certain component combinations.
20 T r oubleshooting Incorrect operation is sometimes mistaken for malfunction. If problems occur , refer to this troubleshooting section. I f p r oblems persist, contact your Mark Levinson dealer . 1. No audio and the fr ont panel indicator LED is not lit.
21 4. No audio and the fr ont panel indicator LED is lit at full brightness. • The N º 33H is powered on, but is not passing a signal. Power the N º 33H off with the ~ac mains r elay switch , then examine the signal cables to ensure a solid connec- tion between the N º 33H and the associated preamplifier and loudspeakers.
22 Car e & Maintenance T o remove dust from the cabinet of your N º 33H , use a feather duster or a lint-free soft cloth. T o remove dirt and fingerprints: 1. Dampen a soft, lint-free cloth with isopropyl alcohol, then lightly clean the surface of the unit with the cloth, moving with the “ grain ” of the anodized, brushed aluminum.
23 Specifications The correlation between published specifications and performance is unreliable. Measurements of your amplifier yield excellent results by any standards. However , only those specifications that apply to its actual operation are included here.
Dimensions 24.
25 Declaration of Conformity Application of Council Dir ective(s): 89/336/EEC and 73/23/EEC, as amended. Standar d(s) to which Conformity is Declared: • EN 55013 : 2001 • EN 55020 : 2002 • EN 60.
26 Notes.
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3 Oak Park, Bedford, MA, 01730-1413 USA | T elephone: 781-280-0300 | Fax: 781-280-0490 | www .marklevinson.com Customer Support: T elephone: 781-280-0300 | Sales Fax: 781-280-0495 | Service Fax: 781-280-0499 Product Shipments: 16 Pr ogress Road, Billerica, MA 01821-5730 USA Part No.
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