Alto AMX-80 Service Manual
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Summary of Contents for Alto AMX-80

  • Page 2: Table Of Contents

    CONTENT 1. INTRODUCTION .....................1 2.TECHNICAL SPECIFICATION...................2 3. BLOCK DIAGRAM ....................3 4. SCHEMATIC DIAGRAM ...................4 5. WIRING DIAGRAM ....................6 6. PCB LAYOUT ......................7 7. TEST PROCEDURE ....................9 8. EXPLODED VIEW & MECHANICAL PARTS LIST ............11 9. BOM ........................13...
  • Page 3: Introduction

    1. INTRODUCTION - 1 MIC Input channel with gold plated XLR and balanced line inputs - 2 Stereo input channel with balanced TRS jacks - Extremely high headroom-offering dynamic range - Balanced inputs for highest signal interity - Warm, natural 2-Band EQ on mono channel. - Warm, natural 2-Band EQ on mono channel.
  • Page 4: Technical Specification

    2.TECHNICAL SPECIFICATION - 2 -...
  • Page 5: Block Diagram

    3. BLOCK DIAGRAM - 3 -...
  • Page 6: Schematic Diagram

    4. SCHEMATIC DIAGRAM - 4 -...
  • Page 7 - 5 -...
  • Page 8 - 5 -...
  • Page 9: Wiring Diagram

    5. WIRING DIAGRAM - 6 -...
  • Page 10: Pcb Layout

    6. PCB LAYOUT HB02128-AMX-80 TOP LAYER TOP OVERLAY - 7 -...
  • Page 11 HB02128-AMX-80 BOTTOM LAYER BOTTOM OVERLAY - 8 -...
  • Page 12: Test Procedure

    2). AP input : Load 100K BNC-Unbal or Load 100K Bal-Float BW 22Hz~22KHz. Fltr A-Weighting(1207) 3. Visual Check: 1). Check the AMX-80 surface; and be sure no friction of all pots. 4. Functions Test: 1). Set all knob to 0 position, TRIM to minimum , and MAIN MIX LEVEL to middle position.
  • Page 13 Set the PHONES to maximum, the output level should be+10dBu (±3dBu), THD+N<0.006%. ( After test set the knob to central position and CH LEVEL to minimum. ) 7). Set AP input to 0dBu, connecting unbalanced input at LINE IN2/3~ LINE IN4/5, and the unbalanced output to PHONES, the output level should be 0dBu(±3dBu) THD+N<0.01%.
  • Page 14 5. Frequency Response test With unbalance input connecting LINE IN of the AMX-80, set the high EQ knob to maximum & low EQ knob to minimum(the mid EQ to middle position),and use unbalanced output to connect MAIN OUT. The frequency response diagram should be as following: 6.
  • Page 15: Exploded View & Mechanical Parts List

    8. EXPLODED VIEW & MECHANICAL PARTS LIST - 12-...
  • Page 16 - 12 -...
  • Page 17: Bom

    9.BOM Class Part No. Part Name Specification Remark PF03243 MIXER AMX-80_ALTO_230V panle-RS AMX-80 ALTO_V1.3 0001 MA06128 chassis-RS AMX-80 ALTO_V1.2 0002 MB04892 HI00171 power switch-RS R612KKAT0F1 0003 knob 10.5*18mm 0004 NI02084 NI02817 knob 10.5*18mm 0005 knob 10.5*18mm 0006 NI02082 knob 10.5*18mm...
  • Page 18 NC00005 0025 EV foam 25*20*5 0026 ND00155 tin without lead-RS M705E Sn 3Ag-0.5Cu 0027 AC00179 9.5148 PC board-RS P-AMX-80-SMD 0028 HK07193 RLS4148 0.5A (LL-34) 0001 SE00011 SMD rectifier diode D1,D2,D3,D4,D5,D6,D9,D10 SMD precise resistor 1/10W 100K ±1% 0603 4 R132,R133,R134,R135 0002...
  • Page 19 SMD rectifier diode SG00116 SMD integrated circuit BA10339FV E2(SSOP-B14)/(ROHM) 2 U13,U14 0041 RD00213 SMD precise resistor 1/10W 7.50K ±1% 0603 1 R18 0042 PC board-RS P-AMX-80-AI HK07170 0043 PCB-RS AMX-80_VER061222 HB02128 0001 mylar capacitor-RS-ACT 0.01uF/100V 3% 2 C104,C105 CC00074 0002...
  • Page 20 Part No. Part Name Specification Remark U1,U2,U3,U4,U5,U6,U7,U integrated circuit-RS 4580M(SOP8)/(YW) SG00558 0044 8,U9,U10,U11,U12 electrolytic capacitor 1000uF/10V 8*11mm 5mm 1 C11 CB00255 0029 integrated circuit MC78L18ACP(TO92)/(ON) 1 IC3 SD00238 0030 dessicant 0033 HJ00002 carton-RS AMX-80 ALTO_V1.1 0034 NB04919 - 16 -...

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