AudioNote-L2-pre-sm 电路图 维修手册.pdf

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1、Copyright 2007, 2008 AudioNote Kits www.AudioNoteK Page 1 Manual Version 2.3 - May 2008 Downloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库 Copyright 2007, 2008 AudioNote Kits www.AudioNoteK Page 2 Table of Contents Section1: Introduction.4 General Information.4 Preparation .4 Solder

2、ing.5 De-soldering.6 Section 2: Mechanical Assembly.7 Installing the feet.7 Mains Transformer, Choke, and Mains Installation .7 Configuring the Primary Winding for your World Region.9 Installing the IEC Socket (AC Socket) and Rocker Switch .12 Installing the Choke.13 Installing the Mains Transformer

3、.13 Wiring up the Mains.14 Shield Positioning.15 Section 3: M2 Power Supply .17 M2 Power Supply Board Parts List.18 M2 Power Supply Board Construction Steps.19 Installing the Valve Bases.19 Installing the Resistors.21 Installing resistors in the HT ADJUST position .23 Zener Diode Installation .24 El

4、ectrolytic Capacitor Installation .25 Installing the Bridge Rectifier .27 Installing the Non-Polarized Capacitors.27 Wiring the M2 Power Supply Board.28 Filament Component Section of the M2 Power Supply Board.31 Regulator Installation.32 Installing the LED Harness.33 Remaining Wire Connections.33 In

5、stalling the Heatsink.34 Installing the Choke Wire .35 Inter-wiring to the Mains Transformer.36 Securing the Regulators to the Heatsink.39 Section 4: M2 Power Supply Testing .41 Preparations.41 Fitting the Mains Fuse.41 Installing the LED Indicator .42 Installing the tubes .42 Tidying Up .42 Ohm Che

6、ck.43 Electrical Testing.43 Voltage Check Summary.45 DC Voltage Checks.45 AC Voltage Checks.45 Section 5: Install the Screen.46 Section 6: Line Board Assembly .47 Line Stage Schematic.48 Line Board Parts List.49 Installing the Board Spacers.49 Valve Base Installation.49 Resistor Installation.50 Capa

7、citor Installation .51 Section 7: Wiring Up the Line Stage .53 Filament Wiring.53 Downloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库 Copyright 2007, 2008 AudioNote Kits www.AudioNoteK Page 3 HT and Power Supply Ground Wiring.54 Electrical Test .55 Section 8: RCA input, Selector and

8、Noble Volume Pot.57 Installing and wiring your first pair of RCA inputs.57 ELMA Switch Hook-up.59 Volume Pot Installation.60 Section 9: Audio Signal Test .65 Section 10: Output Wiring.67 RCA Connections .67 Line Board Connections.67 Section 11: L2 Phono Board Build and Installation.68 Phono Board Pa

9、rts List.69 Installing the Spacers and Valve Bases .70 Installing the Resistors.72 Installing the Capacitors.73 Filament Wiring.77 Wiring the Output of the PHONO Stage into the ELMA selector.78 Connecting the HT and Power Supply Ground.79 Phono Input Connections.79 Controlled Phono Input Test.80 Gro

10、und Post Installation.81 Section 11: Finishing Off .82 Fitting the Faceplate .82 Attaching the LED to the Faceplate.82 Final Thoughts .83 Appendix.84 Resistor Color Code Reference.85 Line Stage Schematic.86 M2 Power Supply Schematic.87 Phono Board Schematic.88 Downloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库 Copyright 2007, 2008 AudioNote Kits www.AudioNoteK Page 4