Installation Instructions & Release Notes Nº326S Preamplifier Phono Modules
Important Safety Instructions 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. 8. Do not install near any heat sources such as radiators, heat registers, stoves, or another apparatus that produces heat. 9. Do not defeat the safety purpose of the polarized or grounding-type plug.
ESD (Electrostatic Discharge) Precautions CAUTION The following practices minimize possible damage to circuit board assemblies resulting from electrostatic discharge or improper insertion: • Keep circuit board assemblies in their original containers until ready for use. • Avoid having plastic, vinyl, or Styrofoam in the work area. • Wear an anti-static wrist strap. • Discharge personal static before handling circuit board assemblies. • Remove and insert circuit board assemblies with care.
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. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
Nº326S Preamplifier Phono Modules Installation Instructions & Release Notes Table of Contents Documentation Conventions . . . . . . . . . . . . . . . . . . . . . . . . .vi Special Design Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Configuring & Installing the Phono Modules . . . . . . . . . . . . . .2 Configuration Instructions • Installation Instructions Making Phono Input Connections . . . . .
Installation Instructions & Release Notes Mark Levinson Documentation Conventions This document contains hardware installation instructions and software release notes for the Nº326S Preamplifier Phono Modules. Refer to the Nº326S Preamplifier Owner’s Manual for general safety, installation, and operation instructions. Appears on the component to indicate the presence of uninsulated, dangerous voltages inside the enclosure – voltages that may be sufficient to constitute a risk of shock.
Nº326S Preamplifier Phono Modules Installation Instructions & Release Notes Special Design Features • Seamless Integration When the phono modules are installed, the stereo input connector labeled 7 becomes the phono input connector, accepting input signals from most phono cartridges. As a result, the phono modules benefit from all the high-performance power supply and noise suppression features designed into the Nº326S, allowing them to deliver exceptional sound quality.
Installation Instructions & Release Notes Mark Levinson nuances of a recording, imparts a more engaging texture to the high frequencies, and presents more of the ambience of a recording. All of these properties work together to yield a sonic signature that is wider, deeper, warmer, and clearly superior. Unpacking CAUTION FOLLOW PRESCRIBED ESD PRECAUTIONS (page iii). When unpacking the phono modules: • Save all packing materials for possible future shipping needs.
Nº326S Preamplifier Phono Modules Configuration Instructions Installation Instructions & Release Notes The phono modules must be optimized to work with the associated phono cartridge. Each phono module includes: • 1 adjustable resistive load jumper • 1 adjustable capacitive load jumper • 1 adjustable input gain jumper • 2 screw terminals that accommodate custom loads These features are identified in the illustration shown below.
Installation Instructions & Release Notes Mark Levinson 1. Resistive Load (RL) Jumper Moving-coil phono cartridges often benefit from a low-value resistor termination. • Leave the resistive load jumper CLOSED to place a 200Ω resistor load on the phono input. • OPEN the resistive load jumper to place a 47kΩ resistor load on the phono input. 2. Capacitive Load (CL) Jumper Low-impedance moving-coil phono cartridges often benefit from a capacitor termination.
Nº326S Preamplifier Phono Modules Installation Instructions Installation Instructions & Release Notes The following materials are needed to install the phono modules: Item Quantity Nº326S Preamplifier 1 Nº326S phono modules 2 Anti-static wrist strap 1 1/8-inch hex-key 1 Flat-blade screwdriver 1 Note The phono modules must be configured BEFORE installation. WARNING THESE SERVICE INSTRUCTIONS ARE ONLY INTENDED FOR USE BY QUALIFIED PERSONNEL.
Installation Instructions & Release Notes Mark Levinson To install the phono modules: 1. Place the Nº326S upside-down on a flat, level surface such as a table or workbench. Do not place the Nº326S on a surface that is unstable. Note Perform these installation instructions at a static-free workstation to avoid damaging circuit boards. Damage resulting from failure to work at a static-free workstation may void the manufacturer’s warranty and/or standard repair policies. 2.
Nº326S Preamplifier Phono Modules Installation Instructions & Release Notes 7. Refer to illustrations shown below to locate the following: A. Phono module insertion slots B. Phono module mounting terminals C. Location P300 (plug) D. Location P500 (plug) E. Location P10 (socket) F. Phono module mounting bracket and screw CUSTOM TERMINATION E OPEN P10 F RL =47K RL =200 C L =0nF C L=10nF G=40db G=60db No.
Installation Instructions & Release Notes Mark Levinson 9. Align the phono module mounting bracket mounting screw (F) with the mounting terminal (B) on the main circuit board. Then, use the supplied flat-blade screwdriver to secure the phono module to the main circuit board. Take care not to “over-tighten” the mounting screw. 10. Gently slide the second phono module into the right-most insertion slot (A) as shown in the illustration to the right.
Nº326S Preamplifier Phono Modules Installation Instructions & Release Notes Making Phono Input Connections Installing the phono modules allows the Nº326S to serve as a phono preamplifier. When shipped the Nº326S includes seven stereo input connectors that accept line-level input signals from associated components. Once the phono modules are installed, the stereo input connector labeled 7 serves as the phono input connector, accepting input signals from a phono cartridge.
Installation Instructions & Release Notes Mark Levinson Phono Input Settings When the phono modules are not installed, the stereo input connector labeled 7 serves as the phono input connector. This input is renamed PHONO within the setup menu, and new parameters and settings are added to its Set Inputs menu. Other inputs and setup menus are not affected. The revised setup menu is shown below. No326S Setup Set Inputs Teach IR Mute = -20.0 MaxVol= 80.0 Trig.= 12v,L Sw 1.00 B.
Nº326S Preamplifier Phono Modules Installation Instructions & Release Notes The table below indicates all Set Inputs menu parameters available for the phono input. Default Parameter Setting Possible Settings Name PHONO PHONO, PH/MC, unused Gain* +12dB +0dB, +6dB, +12dB, +18dB Offset* 0.0dB –20.0 to +20.0dB Bal 0.0 0.0 to 6.0 (left or right) Rec.
Installation Instructions & Release Notes Character List A D G J M P S V Y 1 7 + ( a d g j m p s v y 2 8 – ) B E H K N Q T W Z 3 9 . , b e h k n q t w z 4 & / _ C F I L O R U X _ 5 ‘ : c f i l o r u x 0 6 * ? Mark Levinson When the phono modules are installed, the phono input has access to the same character list as the other stereo inputs. This character list is shown at the left. A custom input name entered with the character list replaces the PH/MC name on the custom names list.
Nº326S Preamplifier Phono Modules Installation Instructions & Release Notes 6. Rotate the volume knob or press the volume ± buttons to scroll through all available characters. 7. When the desired character appears on the front panel display, press the enter button to select this character. The cursor will automatically advance to the next character space. • SAVING DATA Custom input names can consist of up to 7 characters, including letters, numbers, punctuation marks, and blank spaces. 8.
Installation Instructions & Release Notes Mark Levinson To adjust the Bal parameter: PHONO (7) 1. Rotate the front panel select knob or press the remote control select ± buttons to select the phono input. • Name= PHONO 2. Press and hold the front panel or remote control setup button until the Name parameter appears on the front panel display. • Bal= <-0.0-> The front panel display indicates the name and volume level of the selected input.
Nº326S Preamplifier Phono Modules Installation Instructions & Release Notes Phono Module Specifications Unless otherwise specified, these specifications indicate nominal values measured over a 20Hz to 20kHz bandwidth through balanced (XLR) connections. Gain • 40 or 60dB @ 1kHz Input Overload • • >100mV @ 1kHz, 40dB gain 200Ω or 47kΩ (user-selectable) Custom • • • THD + N • <0.
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3 Oak Park, Bedford, MA, 01730-1413 USA | Telephone: 781-280-0300 | Fax: 781-280-0490 | www.marklevinson.com Customer Service: Telephone: 781-280-0300 | Sales Fax: 781-280-0495 | Service Fax: 781-280-0499 Product Shipments: 16 Progress Road, Billerica, MA 01821-5730 USA Part No.
