Alto EQU231VU-MKII V2 Service Manual Download Page 5 | Manualshive

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Summary of Contents for EQU231VU-MKII V2

Page 1: ...www altoproaudio com Version 1 0 MODEL EQU231VU MKII V2 Revised on Jan 2010 ...

Page 2: ...CONTENTS 1 Introduction 1 2 Specification 2 3 Block Diagram 3 4 Schematic Diagram 4 5 Wiring Diagram 8 6 PCB Layout 9 7 Test Procedure 13 8 Exploded View Mechanical Parts List 17 9 BOM List 19 ...

Page 3: ...llows the user to use the creativity to obtain nice results in terms of sound characterization The EQU231VU MKII V2 Graphic Stereo 31 Band Equalizer VU meter 2 Features Constant Q circuitry with a 3 center frequency accuracy Control range 6dB 12dB selectable Active balanced and unbalanced input and output connectors Variable input level control Signal clop pilot Ground LIFT switch to disconnect si...

Page 4: ...e balanced XLR and 1 4 TRS Unbalanced RCA Output impedance 600Ω High pass filter 40Hz 12dB Oct fixed button type Low pass filter 16KHz 12db Oct fixed button type Frequency response 20 Hz to 50kHz at 1 5dBu THD N 0 01 1kHz all VR at middle position S N Ratio 110dB 95V 120V AC 60Hz 220V 240VAC 50Hz 60Hz Consumption 18W Dimension 483 W 220 D 88 H mm 19 8 66 3 5 Power supply Input impedance Output con...

Page 5: ...3 Block Diagram 3 ...

Page 6: ...4 Schematic Diagram 4 ...

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Page 10: ... 6 7 5 Wiring Diagram 8 ...

Page 11: ... 6 PCB Layout 9 ...

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Page 15: ...I V2 3 Connect the output of EQU231VU MKII V2 to the input of AP Adjustment according to following procedures 1 Set the potentiometer of 31 band EQ in center set the input level at 0dB all buttons out 2 Turn input level to maximum the output level 12dB 1dB and the distortion shall be 0 003 0 001 3 Set INPUT LEVEL at minimum the output level shall be 12dB 1dB and distortion shall be 0 006 0 001 7 T...

Page 16: ...is as following 10Hz 22KHz 2dBu 5 Adjust the input level so that the AP output is 0dB press the HI pass button and the frequency response is as following 6 Adjust the input level so that the AP output is 0dB press the low pass button and the frequency response is as following 14 ...

Page 17: ...s 12 adjust slide buttons to maximum and minimum measure the frequency response independently and the curve shall be as following 8 Turn off the AP input signal and set input level as maximum the AP setting is as following now it shall be no more than 82dB 15 ...

Page 18: ...B and distortion is 1 10 Now the S N shall be no less than 110dB 11 Connect AP input and output to Channel 2 repeat steps 1 10 12 Input a 0dBu signal adjust the INPUT LEVEL to 0dBu and AP output shall be 0dBu Now it shall indicate 0dBu on the Vu meter 13 All slides shall be set in center and all buttons out before shipping Test Completed 16 ...

Page 19: ...8 Exploded View Mechanical Parts List MODEL No EQU231VU MKII V2 17 ...

Page 20: ...4 15 MG00041 Black plated screw M3 6 20 16 ME00016 Color nut 4mm 1 17 MF00038 Spring washer ψ4 ψ7 1t 2 18 MF00048 Outer fear washer ψ4 ψ8 0 5t 3 19 HK02058 K PCB P EQU231VUFP II DIP 2 20 HK02063 K PCB P EQU31EQ II DIP 2 21 HK02065 K PCB P EQU31PU II DIP 1 22 HK02066 K PCB P EQU31PU II 1 DIP 1 23 ND00340 Dust cover 344 37 2 24 HK04116 K PCB P EQU231SW II DIP 2 25 NI00002 Plastic nut Hexψ7 16 G20 15...

Page 21: ...Ⅱ DIP 0001 HK04531 PC board P EQUVU Ⅱ AI 0001 HB01357 PCB EQUVU Ⅱ 3 3 _VER060204 0002 CA00081 ceramic capacitor RS 0 01uF 50V Z5V C2 C3 0003 RA00209 fixed resistor 1 4W 680Ω R4 0004 RA01112 fixed resistor 1 4W 100Ω R5 0005 RA01115 fixed resistor 1 4W 20KΩ R3 0006 RA01276 fixed resistor 1 4W 33KΩ R6 0007 SA00093 rectifier diode 1N4148 0 5A D1 0008 HA01925 jump 10mm JP4 JP1 JP2 JP3 0002 SA00194 L E ...

Page 22: ...pacitor 0603 0 1uF 50V Y5V 80 20 C14 C15 C16 C17 C26 C27 C28 C29 C30 C31 C32 C33 C100 0014 SG00122 SMD integrated circuit RS ACT NJM4580M TE3 SOP8 JRC IC6 IC1 IC2 IC3 IC4 0015 SF00056 transistor MMBT3904 SOT23 PHI TR9 0016 RD00274 SMD precise resistor 1 10W 100Ω 1 0603 R53 0017 RD00301 SMD precise resistor 1 10W 12 1KΩ 1 0603 R12 0018 RD00264 SMD precise resistor 1 10W 60 4KΩ 1 0603 R41 0019 RD002...

Page 23: ...39 R40 R8 0002 RD00272 SMD precise resistor 1 10W 10 0Ω 1 0603 R26 R33 0003 RD00288 SMD precise resistor 1 10W 6 81KΩ 1 0603 R32 R29 0004 RD00214 SMD precise resistor 1 10W 10 0KΩ 1 0603 R3 R5 R6 R17 R18 R55 R15 R25 R27 R35 R36 R56 R13 R14 0005 RD00219 SMD precise resistor 1 10W 20 0KΩ 1 0603 R42 R43 R44 R45 R10 R11 R54 0006 RD00294 SMD precise resistor 1 10W 24 9KΩ 1 0603 R46 0007 RD00290 SMD pre...

Page 24: ... EQU231VUSW Ⅱ SMD 0001 HB01238 PCB EQU231VUSW Ⅱ 2 3 _VER040921 0002 RD00214 SMD precise resistor 1 10W 10 0KΩ 1 0603 R1 R2 R3 R4 R5 R6 R7 R8 R9 0003 AE00553 SenJu solder paste M705 GRN360 K2 V 0 5KG bottle 0008 HA03155 wire RS 18P 3P 5P 2 6P 140 350 400 350mm UL1007 CN1 0009 AC00603 lead free soldering bar S100 0038 MG00247 copper pillar hexagon4 5 M3 10 0 5PH 15_V1 1 0039 MG00408 copper pillar M3...

Page 25: ...citor 0 018uF 100V 10 C171 C172 C173 0014 CC00066 mylar capacitor 0 022uF 100V 5 C176 0015 CF00155 metal film capacitor MSC 0 22uF 63V 5 CASE02 C153 C154 C155 0016 CC00067 mylar capacitor 0 0027uF 100V 10 C164 0017 CC00068 mylar capacitor 0 027uF 100V 10 C159 C157 C158 0018 CF00193 metal oxide film resistor MSC 2 2uF 63V 5 CASE05 C145 C146 C147 C117 0019 CC00058 mylar capacitor 0 0033uF 100V 3 C14...

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