Manuale d’uso / di manutenzione del prodotto N28 del fabbricante Mark Levinson
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15 Madrigal Audio Laboratories, Inc. Operating Manual Mark Levinson ® N º 28 Pr ea mp lifie r.
16 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
17 Important safety instructions Please read all instructions and precautions carefully and completely before operating your N º 28 Preamplifier. 1. ALWAYS disconnect your entire system from the AC mains before connecting or disconnecting any cables, or when cleaning any component.
18 From all of us at Madrigal Audio Laboratories, thank you for choosing the Mark Levinson ® N º 28 Preamplifier. A great deal of effort went into the design and construction of this precision device. Used properly, it will give you many years of enjoyment.
19 T able of c on t e n ts Front panel ................................................................................................... 1 Rear panel ...................................................................................................
1 MADRIGAL AUDIO LABORATORIES Nº 28 PREAMPLIFIER INPUT SELECTOR MONITOR SELECTOR RECORD SELECTOR OUTPUT LEVEL OFF 1 2 3 4 5 6 7 8 9 10 INPUT MONITOR DEFEAT TAPE 2 TAPE 1 TAPE 1 TAPE 2 AUX 3 PHONO/ AU.
2 PUSH PUSH PUSH PUSH BALANCED MAIN RIGHT LEFT AUX 2 RIGHT LEFT CD RIGHT LEFT GND POWER SUPPL Y INPUT LEFT RIGHT MAIN T APE 1 T APE 2 T APE 1 T APE 2 AUX 3 TUNER PHONO/ AUX 1 INPUTS OUTPUTS 1 2 3 4 5 6 8 7 Rear panel Disconnect all associated equipment from the AC mains BEFORE making any signal connections and applying power to the N º 28.
3 Refer to the operating manual of your balanced-output line-level source to verify that the pin assignments of its output connector correspond to the N º 28. If not, wire the cable so that the appropriate output pin connects to the equivalent input pin.
4 Unpacking and placement Unpack your N º 28 Preamplifier and keep all packing materials for future transport. Locate and remove all accessory items from the cartons. Carefully inspect the product for damage and flaws. If you find any, see your Mark Levinson dealer immediately.
5 V olt age se lec ti on The PLS-228 is factory-set (internally) for 100V, 120V, 200V, 220V, or 240V AC mains operation @ 50 or 60Hz. Make sure that the label on the bottom of the PLS-228 indicates the correct AC operating voltage for your location.
6 Set-up and installation The N º 28 incorporates RCA-type and XLR-type connectors for audio signal input and output. The Madrigal-designed RCA-type connectors used for single-ended audio interconnection are a great improvement over ordinary RCA- type connectors.
7 The high-gain and low-gain phono options offer internally selectable cartridge loading via four single-pole miniature rocker switches, one for each channel. The high-gain and low-gain options have been factory-adjusted at 825 Ω and 47K Ω , respectively.
8 If you wish to vary the input capacitance of the phono option to obtain the optimal value for a particular cartridge, a capacitor may also be inserted into the optional load terminals (see "Terminating the optional load" and "Making the internal adjustments").
9 Be sure all associated equipment is disconnected from the AC mains. After making all signal connections and internal adjustments, connect the ten-pin DC cable from the rear panel of the PLS-228 to the connector on the rear panel of the N º 28.
10 Car e an d m ai n t e n an c e To remove dust from the cabinet of the N º 28, use a feather duster. To remove dirt and fingerprints, we recommend isopropyl alcohol and a soft cloth.
11 Specifications The correlation between published specifications and sonic quality is unreliable. A list of numbers reveals virtually nothing. All technical measurements must be subject to qualitative as well as quantitative interpretation. Measurements of the N º 28 yield excellent results by any standards.
12 Dimensions 10-7/8" (276.3) 17-1/2" (444.5) 7-1/2" (190.5) 1-1/2" (38.1) 3/4" dia. (19.1) 3/8" (9.5) 1/8" (3.2) 15-17/64" (387.8) 17-17/64" (438.6) 1" (25.4) 7/16" (1 1.1) 7/64" (2.5) 2-3/4" (69.
13 13-1/8" (333.4) 8-35/64" (217.1) 9-1/16" (230.2) 1-55/64" (47.2) 3/4" dia. (19.1) 3/8" (9.5) 3/16" (4.8) 8-3/16" (208.0) 1-15/64" (31.4) 7/16" (1 1.1) 5/64" (2.0) 2-3/4" (69.9) 2-39/64" (66.
14 ©1993 Madrigal Audio Laboratories, Inc. All rights reserved. ® MADRIGAL AUDIO LABORATORIES 2081 South Main Street, P.O. Box 781 Middletown, Connecticut 06457 USA Telephone: (203) 346-0896 Fax: (203) 346-1540 is a registered trademark of Madrigal Audio Laboratories, Inc.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Mark Levinson N28 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Mark Levinson N28 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Mark Levinson N28 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Mark Levinson N28 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Mark Levinson N28, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Mark Levinson N28.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Mark Levinson N28. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Mark Levinson N28 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
