Instruction/ maintenance manual of the product N28 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.
An important point after buying a device Mark Levinson N28 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Mark Levinson N28 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Mark Levinson N28 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Mark Levinson N28 you will learn all the available features of the product, as well as information on its operation. The information that you get Mark Levinson N28 will certainly help you make a decision on the purchase.
If you already are a holder of Mark Levinson N28, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Mark Levinson N28.
However, one of the most important roles played by the user manual is to help in solving problems with Mark Levinson N28. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Mark Levinson N28 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
