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LTO AMX 220FX-USB Service Manual
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LTO AMX 220FX-USB Service Manual

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MODEL: AMX 220FX-USB

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Summary of Contents for LTO AMX 220FX-USB

  • Page 1 MODEL: AMX 220FX-USB...

  • Page 2: Table Of Contents

    CONTENT 1. INTRODUCTION……………………………………………………………………………..1 2. TECHNICAL SPECIFICATION……………………………………………………………..2 3. BLOCK DIAGRAM……………………………………………………………....3 4. SCHEMATIC DIAGRAM…………………………………………………………………….4 5. WIRING DIAGRAM………………………………………………………………………….13 6. PCB LAYOUT………………………………………………………………………………..14 7. TEST PROCEDURE………………………………………………………….....18 8. EXPLODED VIEW & MECHANICAL PARTS LIST……………………………………..25 9. BOM…………………………………………………………………………………………..27...

  • Page 3: Introduction

    1. INTRODUCTION - 8 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 - +4dBu/-10dBV selector on each stereo 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 USB PORT AMX-220FX USB TO PC PROTOCOL CONTROLLER Vout L Vin L Vout L Vin L USB MODULE STEREO CHANNELS 15 MONO CHANNEL 1 STEREO CHANNELS 16 MONO CHANNEL 2 USB PLAYBACK USB RECORD MUTE/ALT3 4 LED MONO INPUT CHANNELS ( 1-8) (FREQ) HI GAIN TAPE OUT...
  • Page 6 R136 AMX-220FXPU1-USB(1/2) 7K15 47u/25V 100N +VCC 7805 LINE IN 9 R131 680R 2K20 +VCC 47u/25V 100P LEFT BA15218N BA15218N PRE-CH9 C195 SW1A 1000uF/16V PS-22E85L 4580M JY-6351G-02-250 47u/25V 100N PGND PGND 2K20 100P 7K15 2.0-12P 2.0-12P R135 2.0-12P (TO AMX-220FXMN1) (TO AMX-220FXPU2) 2K20 (TO AMX-220FXMN1) (TO AMX-220FXMN1)
  • Page 7 USB MIXER AMX-220FXPU1-USB(2/2) R109 10K0 VINL R104 VINL 10K0 SW11A MAINL MAINL SW 2WAY U10A 4580M USB RECORD 100n 100n +VCC R113 USB B TYPE 10K0 U10C U13C USB GND 4580M 4580M VINR R106 VINR -VCC C100 10K0 SW11B MAINR 100n 100n MAINR...
  • Page 8 AMX-220FXPU2-USB (1/2) 11K0 470P 22u/35V C161 4580M R105 4580M 47u/25V 10K0 5K11 C165 INSERT5 C105 U13A MIC 1 470P 11K0 4580M 47u/25V C113 22u/35V 47u/50V INSERT1 4580M R121 4148 4148 R117 R153 MIC 5 10K0 5K11 LO CUT LO CUT 3K60 5K11 O10K...
  • Page 9 AMX-220FXPU2-USB (2/2) PHANTOM PWR +VCC 7815A CN2.5-2P-90 C186 C185 5817 C193 AC IN 2200uF/25V 2200uF/25V 1N4002 1000u/25V PGND RLS4148 C188 C194 2200uF/25V RLS4148 PGND C187 1000u/25V 1N4002 2200uF/25V 5817 C189 -VCC 7915A 100uF/100V 1N4002 PHANTOM C190 100uF/100V C196 R183 TIP122 PH PWR PH PWR-LED 100uF/100V...
  • Page 10 AMX-220FXMN1-USB(1/2) MAIN MIX MAIN OUT LEFT (BALANCED) 10K0 15K0 68R0 47u/25V MAIN L 3 MAIN L 3 R358 R360 R100 47u/25V LEFT 120R R364 8K66 4580M R362 10K CHANGE TO 3K3 LEFT BUS C342 MAINL 4.7uF/25V +VCC VR1A EFXRTN L Ne C342 1 EFXRTN L 10KD...
  • Page 11 AMX-220FXMN1-USB(2/2) 2TK TO MIX 2TK TO CR L 2TK TO CR R SW3A SW3B R353 PS 22E85L R356 PS 22E85L R153 R155 LEFT BUS RIGHT BUS 47u/25V VR97A VR97B 47u/25V 47u/25V W50K W50K R152 2TK IN L 2TK IN R 2TK IN L 2TK IN R 47u/25V...
  • Page 12 AMX-220FXMN2-USB EQ HI (12K) SW2:MUTE/ALT3 4 EQ HI (12K) SW33:MUTE/ALT3 4 R121 C137 SW3:SOLO,PFL C141 SW34:SOLO,PFL C201 VR17 C213 VR13 VR21 MID (FREQ 100Hz 8K) MID (FREQ 100Hz 8K) 47u/25V 6.8n 47u/25V 6.8n B50K 6.8n B50K R249 SW2A B50K 6.8n B50K R261 SW33A...
  • Page 13 D SP- PR E C345 R399 C329 1. 5nF 2 5% R398 R422 R400 U49D U48B R397 74HC14 R420 74HC109 100R C348 U49F U44B U44A 74HC14 4580M 4580M ( M UTE) C347 R406 C331 1 5nF 2 5% D G N D D G N D R405 R408...
  • Page 14 A M X - U SB 3. 6V ~3. 8V 1K82 100n A 1117 3K16 100uF 100n U SB_G N D D G N D U SB_G N D SSPD N CON12 V D D I V BU S D G N D D G N D U SB_G N D D G N D...
  • Page 15 A M X- 220FX U SB P H A N T O M S W POWER SW Voltage Converter 18VAC ~ I N PU T AC I N AC 120V/ 60H z AC 230V/ 50H z O U TPU T C N 4 AC 18V/ 1300m A C N 2...

  • Page 16: Pcb Layout

    6. PCB LAYOUT - 14 -...
  • Page 17 PCB:AMX-USB B Top Layer Top Overlay Top Solder PCB:AMX-USB Bottom Layer Bottom Overlay Bottom Solder...
  • Page 18 PCB:MX220FXMN1-USB Top Layer Top Overlay Top Solder PCB:MX220FXMN1-USB Bottom Layer Bottom Overlay Bottom Solder...
  • Page 19 PCB:AMX220FXMN2-USB Bottom Layer Bottom Overlay Bottom Solder PCB:AMX220FXMN2-USB Top Layer Top Overlay Top Solder...
  • Page 20 Bottom Layer Bottom Overlay Bottom Solder PCB:AMX220FXPU1-USB Top Layer Top Overlay Top Solder - 18 -...
  • Page 21 Bottom Layer Bottom Overlay Bottom Solder PCB:AMX220FXPU2-USB Top Layer Top Overlay Top Solder - 19 -...
  • Page 22 PCB:DSP-PRE Bottom Layer Bottom Overlay Bottom Solder PCB:DSP-PRE Top Layer Top Overlay Top Solder...

  • Page 23: Test Procedure

    7. TEST PROCEDURE 1. Instruments: 1). AP (Audio Precision) 2). Dual oscillograph 3). Voltmeter 4). USB line 2. Instruments Setting: 1). AP output: 0dBu 1KHz SINE waveform, Load out 40 Bal-Gnd or Load out 20 Unbal-Gnd. 2). AP input: Load 100K BNC-Float or Load 100K XLR-Bal BW: 22Hz~22KHz. Fltr: A-Weighting (1207).
  • Page 24 TRIM, AUX1, AUX2, AUX SENDS, AUX RTN1, AUX RTN2 (DFX), 2TK IN, ALT3-4 to min, and turn the entire keys to OFF. (Turn the LEVEL on CH1~16 to max when this channel should be tested) 3). Input 0dBu to AP, connect the balanced input to MIC1~8 respectively, a.
  • Page 25 THD+N<0.005%; when rotate the 2TK IN to max, the output is +11dBu (±2dB) THD+N<0.005%. b. Release the 2TK TO MAIN MIX, connect the unbalanced output to CONTROL ROOM, press the 2TK TO CONTROL ROOM, and the output is +4dBu (±2dB) THD+N<0.005%.
  • Page 26 MAIN MIX LEVEL potentiometer to max, the LED LEVEL will light up in return, the output of MAIN MIX OUTPUT will match with the LED LEVEL. (Whenever the LED point at which level, it will appear the corresponding level value). b.
  • Page 27 3). Input +15dBu to AP, connect the unbalanced input to LINE IN1~8, the unbalanced output to MAIN MIX OUTPUT, push the CH LEVEL to 0, we can see the max and min variation about MID and PREQ on EQ. 4). Input +4dBu to AP, connect the unbalanced input to LINE IN9~16, the unbalanced output to MAIN MIX OUTPUT, push the CH LEVEL to 0, we can see the max and min variation for HI and LOW on EQ: - 25 -...
  • Page 28 5). Input +4dBu to AP, connect the unbalanced input to LINE IN 9~16, the unbalanced output to MAIN MIX OUTPUT, push the CH LEVEL to 0, we can see the max and min variation about HI MID and MID LOW on EQ: 6.
  • Page 29 3). Switch the USB RECORD to CH1/2, 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 the output is +5dBu (±2dB) THD+N<1%. 5).
  • Page 30 8). Open the C:\Apwin\S2\A-a\A-A FFT. At2 and set as following: 9). Do not input signal, connect the unbalanced output to MAIN MIX OUTPUT, and 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 31 8. Selecting Check: Connect the AMX-220FX USB to high quality amplifier and speaker, and listen to it if it appear abnormal sounding. 9. Factory Preset: Rotate the entire volume control knob to min, the other control knob to mid, and turn the entire switch OFF.

  • Page 32: Exploded View & Mechanical Parts List

    8. EXPLODED VIEW & PARTS LIST - 30 -...
  • Page 33 PARTS LIST No. Part No. Description Specification 1 NI01947 ZC-handle AMX-220; 220FX-V1.0 2 MA05706 ZC-board AMX-220FX USB ALTO-V1.3 3 MG00061 screw-RS M3*10 4 HK06417 K-PC board P-AMX220FXPU2-USB-DIP 5 NI01862 knob-RS-C 5.5*5.5*14.5-V1.1 6 NI01863 key-RS 5.5*W10*7.5 black 7 NI02377 key-RS-C-ABS 5.5*7.5mm (3.3*3.3mm) black 8 HK06381 K-PC board AMX-USB-DIP 9 MI03271 ZD-heat sink-AMX220FX.USB-03 AMX220FX.USB 1t*120*175-V1.0 1...

  • Page 34: Bom

    9. BOM No. Part No. Description Specification Remark 1 NI00498 self adhere foot cushion 12.7*7*6mm(SF 005) 2 NI00271 sleeve 7*20mm 3 NI00270 sleeve 7*1000mm 4 NI00378 plastic washer 9*13 used to PU socket 5 NI00218 cable tie ALT 102SB 6 NI02714 knob 10*13.5mm 7 NI02377...
  • Page 35 No. Part No. Description Specification Remark 57 MG00326 screw 58 MF00061 MIC jack 9.6* 13*0.5t 59 ME00143 nut 5/6"x32w 60 ME00060 MIC jack JY 6351G 02 250 61 MG00243 copper pillar M3*5*0.5PH 62 HI00171 power switch RS R612KKAT0F1 63 HJ00006 dessicant 64 HI00026 power switch RS...
  • Page 36 No. Part No. Description Specification Remark 105 RD00345 SMD fixed resistor 1/10W 390K ±5% 0603 R180 R49,R50,R51,R52,R53,R54,R55,R56,R57,R58,R59,R60,R61 106 RD00406 SMD precise resistor 1/10W 3.60K ±1% 0603 ,R62,R63,R64 D2,D3,D4,D5,D6,D7,D8,D9,D10,D11,D12,D13,D14,D15,D16, 107 SE00011 SMD rectifier diode RLS4148 0.5A (LL 34) D17,D18,D19,D20,D21,D22,D23,D24,D25,D26,D27,D28,D29 ,D30,D31,D32,D33,D38,D39 U1,U2,U3,U4,U5,U6,U7,U8,U9,U10,U11,U12,U13,U14,U15, 108 SG00558 integrated circuit RS 4580M(SOP8)/(YW) C1,C2,C3,C4,C5,C6,C7,C8,C9,C10,C11,C12,C13,C14,C15,...
  • Page 37 No. Part No. Description Specification Remark 144 HI00161 relay RY 5W K,5V 145 HI00195 rotary switch SDB161PVB15.5F 1 4 16 16PC EN1,EN2 146 HI00238 push button switch RS 2 6P PS 92 26A(NON LOCK) 147 HI00236 push button switch RS 2 6P PS 92 26A(SELF LOCK) SW1,SW2,SW3,SW4,SW5,SW6,SW8,SW9,SW10,SW11 148 HI00237...
  • Page 38 No. Part No. Description Specification Remark U1,U2,U3,U4,U5,U6,U7,U8,U9,U10,U11,U12,U13,U14,U15,U16, 183 SG00558 integrated circuit RS 4580M(SOP8)/(YW) U17,U24,U25,U26,U27,U28,U29,U30,U31,U32,U33,U34,U35,U3 184 RD00078 SMD fixed resistor 1/10W 470 ±5% 0603 R370 R80,R81,R277,R278,R279,R280,R281,R282,R283,R284,R2 185 RD00339 SMD precise resistor 1/10W 47.0K ±1% 0603 85,R286,R287,R288,R289,R290,R369 186 RD00290 SMD precise resistor 1/10W 47.5K ±1% 0603 R311,R312 187 RD00298 SMD precise resistor 1/10W...
  • Page 39 No. Part No. Description Specification Remark 227 CL00006 SMD tantalum capacitor RS ACT 10uF/16V case B2 C350,C351 228 RD00068 SMD fixed resistor 1/10W 100 ±5% 0603 R420,R421 229 RD00073 SMD fixed resistor 1/10W 220 ±5% 0603 R426 230 RD00059 SMD fixed resistor 1/10W 0.0 ±5% 0603 231 RD00083 SMD fixed resistor 1/10W 1.0K ±5% 0603...
  • Page 40 No. Part No. Description Specification Remark 280 HI00236 push button switch RS 2 6P PS 92 26A(SELF LOCK) SW1,SW4,SW7,SW10,SW32,SW35,SW38,SW41 SW2,SW3,SW5,SW6,SW8,SW9,SW11,SW12,SW33,SW34,S 281 HI00237 push button switch RS 2 12P PS 13422 R(SELF LOCK) W36,SW37,SW39,SW40,SW42,SW43 282 HC00250 connector(male) 5P 2.0mm 180° 283 HC00259 connector(male) 8P 2.0mm 180°...
  • Page 41 No. Part No. Description Specification Remark C1,C2,C3,C4,C5,C6,C7,C8,C9,C10,C11,C12,C13,C14,C15, 317 CF00141 metal film capacitor MSC 0.0068uF/100V 5% CASE01 C16,C17,C18,C19,C20,C21,C22,C23,C24 318 HB01836 PCB RS AMX220FXMN2 USB VER060228 319 AC00179 tin without lead RS M705E Sn 3Ag 0.5Cu VR9,VR10,VR11,VR12,VR13,VR14,VR15,VR16,VR17,VR18, 320 RC00672 potentiometer RS B50K XV09213YNPV30F 1B50K C.C VR19,VR20,VR21,VR22,VR23,VR24,VR25,VR26,VR27,VR2 8,VR29,VR30,VR31,VR32 VR73,VR74,VR75,VR76,VR77,VR78,VR79,VR80,VR81,VR8...
  • Page 42 No. Part No. Description Specification Remark 360 RD00091 SMD fixed resistor 1/10W 3.3K ±5% 0603 R123,R124 361 RD00002 SMD fixed resistor 1/8W 0.0 ±5% 0805 362 RD00129 SMD fixed resistor 1/4W 0.0 ±5% 1206 363 HK06415 PC board P AMX220FXPU1 USB AI 364 CB00253 electrolytic capacitor 1000uF/16V 10*16mm 5mm C195...
  • Page 43 No. Part No. Description Specification Remark 415 CI00049 SMD ceramic capacitor 0603 15PF/50V C0G±5%(C1608C0G1H150JT)/TDK C8,C9 416 CI00075 SMD ceramic capacitor 0603 0.1uF/50V Y5V +80,-20% C17,C15,C18,C6,C10,C22,C20,C13,C14,C1,C3,C4,C11 417 RD00059 SMD fixed resistor 1/10W 0.0 ±5% 0603 R35,R36 418 RD00061 SMD fixed resistor 1/10W 10 ±5% 0603 419 RD00068 SMD fixed resistor 1/10W 100 ±5% 0603...