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Alto AMX 180FX-USB Service Manual
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Alto AMX 180FX-USB Service Manual

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MODEL: AMX 180FX-USB

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Summary of Contents for Alto AMX 180FX-USB

  • Page 1 MODEL: AMX 180FX-USB...

  • Page 2: Table Of Contents

    CONTENT 1. INTRODUCTION……………………………………………………………………………..1 2. TECHNICAL SPECIFICATION……………………………………………………………..2 3. BLOCK DIAGRAM……………………………………………………………....35 4. SCHEMATIC DIAGRAM…………………………………………………………………….47 5. WIRING DIAGRAM………………………………………………………………………….1211 6. PCB LAYOUT………………………………………………………………………………..1313 7. TEST PROCEDURE………………………………………………………….....1819 8. EXPLODED VIEW & MECHANICAL PARTS LIST……………………………………..2529 9. BOM…………………………………………………………………………………………..273...

  • Page 3: Introduction

    1. INTRODUCTION - 5 MIC input channels with gold plated XLR and balanced LINE inputs - 4 stereo input channels with balanced TRS jacks - Ultra-low noise discrete MIC pre-amps with +48V Phantom Power - Extremely high headroom offering more dynamic range - Insert on each of mono input channels - Switchable Low-cut filter on each mono channel - +48dBu/-10dBV on each channel...

  • Page 4: Technical Specification

    2. TECHNICAL SPECIFICATION Mono input channels Microphone input Electronically balanced ,discrete input configuration Frequency response 10Hz to 55KHz, 3dB Distortion (THD&N) 0.005% at +4dBu, 1KHz Gain range 0dB to 44dB(MIC) SNR (Signal Noise Rated) 115dB Line input Electronically balanced Frequency response 10Hz to 55KHz, 3dB Distortion (THD&N) 0.005% at +4dBu, 1KHz...

  • Page 5: Block Diagram

    3. BLOCK DIAGRAM - 3 -...

  • Page 6: Schematic Diagram

    4. SCHEMATIC DIAGRAM - 4 -...
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  • Page 14: Wiring Diagram

    5. WIRING DIAGRAM - 12 -...

  • Page 15: Pcb Layout

    6. PCB LAYOUT -13 -...
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  • Page 18 PCB:AMX180FXPU1-USB Bottom Layrt Botttom Overlay Bottom Solder PCB:AMX180FXPU1-USB Top Layrt Top Overlay Top Solder - 16 -...
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  • Page 20: Test Procedure

    7. TEST PROCEDURE 1. Instruments: 1). AP (Audio precision) 2). Dual oscillograph 3). voltmeter 4).USB connector line 2. Instruments Setting: 1). AP output: 0dBu 1KHz SINE wave, Load out 40Ω Bal-Gnd or Load out 20Ω Unbal-Gnd. 2). AP input: Load 100KΩ BNC-Float or Load 100KΩ XLR-Bal BW: 22Hz~22KHz. Fltr: A-Weighting (1207).
  • Page 21 4). Connect the unbalanced input to AUX RETURN2 respectively, the unbalanced output (LEFT & RIGHT) of the MAIN MIX OUTPUT is 4dBu (±2dB) THD+N<0.005%. 5). Connect the unbalanced input to AUX RETURN1 respectively, the balanced output (LEFT & RIGHT) of the MAIN MIX OUTPUT is 4dBu (±1dB) THD+N<0.003%. 6).
  • Page 22 2). When put the EQ HI & LOW knob to max and min (EQ MID is mid), the frequency response curve is: 3). Set the EQ MID knob to max and min (EQ HI & LOW is in mid) respectively, the frequency response curve is: - 20 -...
  • Page 23 Note: normal instrument frequency response test: 1). Input from each channel respectively; rotate the EQ LOW knob of the corresponding channel to max (±15) in clockwise, and the output is +15dBu (±2dB); rotate the EQ LOW knob on this channel to min (-15) in counterclockwise, and the output is -15dBu (±2dB);...
  • Page 24 3). Switch the USB RECORD to CH1/2 and the USB PLAYBACK to MAIN MIX, connect the USB line to PC, and open the recorder to tape for 60 seconds. 4). Take off the input signal, and press the playing key, the output is 0dBu (±2dB) THD+N<2%.
  • Page 25 7). Take off the input signal, press the LINE/USB on CH11/12, push the CH LEVEL to 0, and then press the playing key, and the output is +4dBu (±2dB) THD+N<1%. 8). Open the C:\Apw in\S2\A-A FFT. at2 and set: 9). Do not input the signal, set the unbalanced output in MAIN MIX OUTPUT, switch the USB RECORD to MAIN MIX, the USB PLAYBACK to MAIN MIX, connect the USB line to PC, and open the recorder to tape for 60 seconds.
  • Page 26 8. Selecting Check: connect the AMX-180FX USB to high quality amplifier and speaker, and listen if there has abnormal noise. 9. Factory Preset: rotate the entire volume control knob to min, and the other control knob in mid, and close the entire switch in OFF. - 24 -...
  • Page 27 8. EXPLODED VIEW & PARTS LIST - 25 -...
  • Page 28 2 HK06386 K-PC board P-AMX180FXMN1-USB-DIP 3 NI01863 key-RS φ5.5*W10*7.5 black 4 NI02377 knob-RS-C-ABS φ5.5*7.5mm(3.3*3.3mm) black 5 MG00041 screw-RS M3*6 6 MA05705 ZC-panel AMX-180FX USB ALTO-V1.3 7 NI02309 knob-RS 24*11.5*11-V1.1 8 NI02352 knob-RS 24*11.5*11 9 NI02353 knob-RS 24*11.5*11 10 NI02082 plastic knob-RS-C φ10.5*18mm dual 11 NI02633 plastic knob-RS-C φ10.5*18mm dual...
  • Page 29 φ10.5*18mm 33 NI01945 handle AMX-180;180FX_V1.0 34 NI02878 handle 330*33*26mm AMX-180 black 35 NF00061 assurance card ALTO 36 NE05004 label ALTO 37 NH00334 cone paper 0.040*1m 38 NB03165 cushion AMX-180 right_V1.0 39 NB03166 cushion AMX-180 left_V1.0 40 NF02622 user manual-RS AMX-180FX USB ALTO_V1.0...
  • Page 30 No. Part No. Description Specification Remark 57 HI00026 power switch-RS RA12KKATOF 2P 58 HA01388 wire-RS 2P 100mm UL1007 24AWG 59 HA03524 wire-RS 2P 340mm UL1007 24AWG 60 HK06386 PC board P-AMX180FXMN1-USB-DIP 61 RC00284 slide potentiometer D10KΩ RF6011YP600F-10KD(SAS1) VR7,VR14,VR21,VR28,VR62,VR63 62 SA00054 L.E.D 3m/m round(yellow)long foot 26 LD2,LD5,LD8,LD11,LD14,LD17,LD20,LD23,LD27,LD31,LD43 LD29,LD32,LD33,LD34,LD35,LD36,LD37,LD38,LD39,LD40,L...
  • Page 31 No. Part No. Description Specification Remark C137,C138,C139,C140,C141,C142,C143,C144,C145,C146,C147 ,C148,C149,C150,C151,C152,C153,C154,C155,C156,C157,C15 96 CI00051 SMD ceramic capacitor 0603 22PF/50V C0G±5%(C1608C0G1H220JT)/TDK 8,C159,C160,C169,C170,C171,C172,C173,C174,C177,C178,C1 79,C180,C185,C186,C253,C254,C255,C256,C282,C283,C284,C 285,C286,C287,C288,C312,C313,C314,C315 97 RD00356 SMD precise resistor 1/10W 26.1KΩ ±1% 0603 R267,R268 R233,R234,R235,R236,R237,R238,R239,R240,R241,R242,R 98 RD00106 SMD fixed resistor 1/10W 27KΩ ±5% 0603 243,R244,R245,R253,R254,R246,R247,R248,R305,R306 99 RD00221 SMD precise resistor 1/10W 27.4KΩ...
  • Page 32 No. Part No. Description Specification Remark 135 RA01260 fixed resistor 1/4W 120Ω R250,R387,R392 C113,C114,C115,C116,C117,C118,C119,C120,C121,C122,C 136 CF00137 metal-film capacitor MSC 0.033uF/63V 5% CASE01 123,C124,C125,C126,C127,C128,C129,C130,C131,C132,C1 33,C134,C135,C136 C65,C66,C67,C68,C69,C70,C71,C72,C73,C74,C75,C76,C77 137 CF00136 metal-film capacitor MSC 0.018uF/63V 5% CASE01 ,C78,C79,C80,C81,C82,C83,C84,C85,C86,C87,C88 C89,C90,C91,C92,C93,C94,C95,C96,C97,C98,C99,C100,C1 138 CF00138 metal-film capacitor MSC 0.012uF/63V ±5% CASE01 01,C102,C103,C104,C105,C106,C107,C108,C109,C110,C11 1,C112...
  • Page 33 No. Part No. Description Specification Remark VR1,VR2,VR3,VR8,VR9,VR10,VR15,VR16,VR17,VR22,VR2 181 RC00672 potentiometer-RS B50KΩ XV09213YNPV30F-1B50K C.C 3,VR24 VR4,VR5,VR11,VR12,VR18,VR19,VR25,VR26,VR32,VR33,V 182 RC00703 potentiometer-RS W50KΩ XV09213YNPV30F-4BP50K CC R39,VR40,VR46,VR47,VR53,VR54,VR60,VR61 VR29,VR30,VR31,VR36,VR37,VR38,VR43,VR44,VR45,VR5 183 RC00669 potentiometer-RS B50KΩ XV012313YGPV30F-3B50K C.C 0,VR51,VR52 184 RC00670 potentiometer-RS W50KΩ XV012313YGPV30F-4B50K C.C VR57,VR58,VR59,VR65 185 RC00700 potentiometer-RS B5KΩ...
  • Page 34 No. Part No. Description Specification Remark R100,R140,R141,R142,R143,R144,R145,R152,R153,R239,R 224 RD00219 SMD precise resistor 1/10W 20.0KΩ ±1% 0603 240,R146,R149,R151,R154 225 RD00105 SMD fixed resistor 1/10W 22KΩ ±5% 0603 R259,R260,R261,R262 C7,C9,C46,C47,C48,C49,C50,C51,C52,C53,C54,C55,C56,C 57,C58,C59,C60,C61,C62,C63,C64,C65,C66,C67,C68,C69, 226 CI00051 SMD ceramic capacitor 0603 22PF/50V C0G±5%(C1608C0G1H220JT)/TDK C70,C71,C72,C73,C74,C75,C76,C77,C78,C79,C80,C81,C10 1,C105,C119,C120,C164,C165 227 RD00265 SMD fixed resistor 1/10W 27Ω...
  • Page 35 No. Part No. Description Specification Remark 268 HC00920 DC jack-RS SCD554CCS103BB4G 269 AC00179 tin without lead-RS M705E Sn 3Ag-0.5Cu 270 MI03095 heat-sink AMX180FX.USB 1t*125*160_V1.2 271 MJ00999 AL plate-RS 1*2000*1000 5.44kg 272 ME00041 iron pillar hexagon6.35*M3*6 273 ME00166 iron pillar M3*3_V1.0 274 MG00024 screw M3*7 0.5PH 275 HA00392 wire-RS...
  • Page 36 RLS4148 0.5A (LL-34) 335 SG00068 SMD integrated circuit 74HC14DT(SO14)/(PHI) 336 SG00410 SMD integrated circuit IC41LV16256-35KG(SOJ40)/(ICSI) 337 SG00166 SMD integrated circuit TY-2 ALTO(GMCODE:105022) 338 SG00147 SMD integrated circuit CHEF DSP(GMCODE:105022) 339 SG00037 SMD integrated circuit LD1117DT33C(TO252)/(ST) 340 HC00611 IC socket (SMD)