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Alesis VX49 Service Manual
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Alesis VX49 Service Manual

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on file with Alesis.
Do not make illegal copies of this document.
The information in this document contains privileged and confidential information. It is intended
only for the use of those authorized by Alesis. If you are not the authorized, intended recipient,
you are hereby notified that any review, dissemination, distribution or duplication of this
document is strictly prohibited. If you are not authorized, please contact Alesis and destroy all
copies of this document. You may contact Alesis at [email protected].
© Copyright Alesis
Confidential
Alesis
VX49
[LQVH]
Service Manual
v1.0
ATTENTION!
Alesis Service Manual

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Summary of Contents for Alesis VX49

  • Page 1 The information in this document contains privileged and confidential information. It is intended only for the use of those authorized by Alesis. If you are not the authorized, intended recipient, you are hereby notified that any review, dissemination, distribution or duplication of this document is strictly prohibited.
  • Page 2 Your purchase of the Manual shall be for your own ultimate use and shall not be for purposes of resale or other transfer. As the owner of the copyright to the Manual, Alesis does not give you the right to copy the Manual, and you agree not to copy the Manual without the written authorization of Alesis. Alesis has no obligation to provide to you any correction of, or supplement to, the Manual, or any new or superseding version thereof.
  • Page 3 ALL REPAIRS DONE BY ANY ENTITY OTHER THAN AN AUTHORIZED ALESIS SERVICE CENTER SHALL BE SOLELY THE RESPONSIBILITY OF THAT ENTITY, AND ALESIS SHALL HAVE NO LIABILITY TO THAT ENTITY OR TO ANY OTHER PARTY FOR ANY REPAIRS BY THAT ENTITY.

  • Page 4: Safety Instructions

    The product is exposed to water or excessive moisture, c. The AC power supply plug or cord is damaged, d. The product shows an inappropriate change in performance or does not operate normally, or e. The enclosure of the product has been damaged. Confidential Alesis Service Manual...
  • Page 5 service manual LQVH 1. Exploded drawing 2. Schematics/ Circuit diagram 3. Level 1 BOM/ Complete BOM...
  • Page 7 +3V3_POT TO RP GND_POT +3V3 U_mcu mcu.Sch POT_BANK4 104(No Stuff) POT_SEL0 SR_CLK0 SR_CLK0 GND_POT POT_SEL1 SR_STROBE0 SR_STROBE0 0.5S-1X-10PWB LED_OE# LED_OE# GND_POT TO TLU LED_DO LED_DO +5V_UNREG +3V3 USB_N SW_DI TO RP USB_N SW_DI USB_P USB_P SR_CLK1 SR_CLK1 CON4 SR_STROBE1 SR_STROBE1 TO RP FOOTSWITCH 0.5S-1X-20PWB...
  • Page 8 +3V3 SDRAM PE2 (TRACECLK, SPI4_SCK, SAI1_MCLK_A, FMC_A23) PH6 (I2C2_SMBA, SPI5_SCK, TIM12_CH1, FMC_SDNE1) 4.75K FMC_D[0..15] FMC_A[0..12] PE3 (TRACED0, SAI1_SD_B, FMC_A19) PH7 (I2C3_SCL, SPI5_MISO, FMC_SDCKE1) SDRAM CONTROLLER PI8 (TAMP_2) PH8 (I2C3_SDA, FMC_D16, LCD_R2) PG3 (FMC_A13) R50 47R CHECK_POWER LED_OE# FMC_A12 FMC_A12 FMC_D15 CHECK_POWER PC13 (TAMP_1) PH9 (I2C3_SMBA, TIM12_CH2, FMC_D17, LCD_R3)
  • Page 9 +3V3_POT TO MN GND_POT U_midi_analog midi_analog.Sch POT_BANK4 POT_BANK4 TO PITCH MOD VR +3V3_POT POT_SEL0 POT_SEL0 POT_SEL1 POT_SEL1 MOD_WIPER MOD_WIPER MIDI_RX 0.5S-1X-10PWB GND_POT MIDI_TX PITCH_WIPER PITCH_WIPER FOOTSWITCH 1735446-6 +3V3 +5V_UNREG GND_POT U_usb_power usb_power.Sch +5V_UNREG TP30 TO MN TO MN USB_N USB_N USB_P USB_P +3V3...
  • Page 10 +3V3 R109 +3V3 U100A D100 EXT_PSU EXT_PSU R107 BAW56LT1G LM393DGKR R105 R108 R110 BMI-S-201-C(No Stuff) D105 +5V_UNREG +3V3 R113 MBRA340T3G D101 U101 VBUS_SENSE VBUS_SENSE Q102A D106 RT8299AZSP C108 Comment: FDC6306P BAW56LT1G R106 +3V3 BOOT Q102B L101 MBRA340T3G R123 C133 FDC6306P 100K 4.7uH R128...
  • Page 11 +3V3 RP100 RP101 RP102 RP103 10K(No stuff) 10K(No stuff) 10K(No stuff) 10K(No stuff) C158 C159 47pF C160 47pF C161 47pF C162 47pF C163 47pF C164 47pF C165 47pF C166 +3V3 47pF C116 C167 47pF C117 C168 47pF C118 C169 47pF C119 C141 C170...
  • Page 12 MIDI I/O R151 220R +3V3 PITCH/MOD +3V3_POT PC100 R152 D103 MIDI_RX MIDI_RX U102A LL4148 R136 15.8K 1% Q103 MOD_WIPER MOD_WIPER R144 MMBT4401 R140 EL357 R129 +3V3_POT 475R C136 C137 R146 PITCH_WIPER 11.8K 1% PITCH_WIPER U102B 475R C113 LMV324MX R137 15.8K 1% R133 R143 R145...
  • Page 13 +3V3 C220 JP200 U_led_button_scan lqvhtll_led_button_scan.Sch SR_CLK SR_CLK SR_STROBE SR_STROBE TO TLU LED_OE# LED_OE# LED_DI LED_DI +3V3 SW_DO SW_DO JP202 R270 R271 R272 0.5S-1X-20PWB TO LED(No Stuff) +3V3_POT C221 GND_POT J201 TO TLU (Pass through to MN) U_pad_scan pad_scan.Sch PAD_SEL BOLT1 BOLT2 BOLT3 BOLT4...
  • Page 14 U200A U200C R200 R201 R216 R218 PAD_BANK0 PAD_BANK2 PAD_BANK0 PAD_BANK2 475R 475R U200B LMV324MX R204 +3V3_POT R202 C214 R208 LMV324MX R205 C216 R210 U200D LMV324MX R217 R207 PAD_BANK1 R212 PAD_BANK1 R214 R219 PAD_BANK3 475R PAD_BANK3 C211 4.75K 4.75K 475R R203 C215 R209 LMV324MX...
  • Page 15 +3V3 C204 +3V3 C207 U205 LED31 SCLK LED30 LCLK LED_DI LED29 SR_CLK LED_DI LED_OE# LED28 LED_OE# LED27 U210 74AHC1G14SE-7 LED26 +3V3 C208 LED25 +3V3C202 LED24 R220 +3V3 BUTTON1 BUTTON2 BUTTON3 BUTTON4 R224 U204 S200 S201 S202 S203 220R U202 +3V3 SW32 SW34 SW36...
  • Page 16 +3V3 C312 J303 U_led_button_scan lqvhtlu_led_button_scan.Sch SR_CLK SR_CLK SR_STROBE SR_STROBE LED_OE# LED_OE# TO MN LED_DI LED_DI +3V3 SW_DO SW_DO C311 SR_CLK_TLL SW_DI J300 SR_STROBE_TLL LED_DO FOOTSWITCH FOOTSWITCH TO TLL FH28E-20S-0.5SH(05) C313 C314 C315 C316 C317 C318 C319 C320 No Stuff No Stuff No Stuff No Stuff No Stuff...
  • Page 17 +3V3 C305 +3V3 C302 U310 U303 SR_CLK R302 SCLK 74AHC1G14SE-7 SR_STROBE_BUF LED54 LCLK LED_DI +3V3 +3V3 C306 LED53 LED_DI LED_OE# LED52 LED_OE# LED51 LED50 U302 LED49 +3V3 R300 RP300 RP301 +3V3 C300 C304 LED48 SR_STROBE R304 R303 74LVC1G17SE-7 220R SN74LV595APWR U306 SR_CLK SR_CLK...
  • Page 18 +3V3_POT C418 J400 GND_POT U_pots pots.Sch POT_SEL0 POT_SEL0 POT_SEL1 POT_SEL1 POT_BANK0 POT_BANK0 TO MN POT_BANK1 POT_BANK1 POT_BANK2 POT_BANK2 POT_BANK3 POT_BANK3 C419 C420 C421 C422 C423 C424 No Stuff No Stuff No Stuff No Stuff No Stuff No Stuff GND_POT 0.5S-1X-20PWB GND_POT BOLT5 BOLT6...
  • Page 19 360 POTS 1-8 +3V3_POT C408 +3V3_POT +3V3_POT +3V3_POT +3V3_POT U400 GND_POT POT_SEL0 POT_SEL0 POT_SEL1 POT_SEL1 D400 D401 D402 D403 D404 D405 D406 D407 POT360_A[0..3] BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 POT360_A0 +3V3_POT GND_POT +3V3_POT GND_POT +3V3_POT GND_POT +3V3_POT GND_POT POT_BANK0 POT360_A1...
  • Page 20 SEL_1 SEL_3 SEL_5 SEL_0 SEL_2 SEL_4 SW17 LL4148 D17 LL4148 D33 LL4148 RD_0 RD_0 RD_0 LL4148 D18 LL4148 D34 LL4148 KEY/PAD KEY/PAD KEY/PAD SW10 SW18 LL4148 D19 LL4148 D35 LL4148 RD_1 RD_1 RD_1 LL4148 D20 LL4148 D36 LL4148 KEY/PAD KEY/PAD KEY/PAD SW11 SW19...
  • Page 21 SEL_1 SEL_3 SEL_5 SEL_7 SEL_0 SEL_2 SEL_4 SEL_6 SW14 SW22 D11 1N4148 D27 1N4148 D43 1N4148 RD_0 RD_0 RD_0 D12 1N4148 D28 1N4148 D44 1N4148 KEY/PAD KEY/PAD KEY/PAD SW15 SW23 D13 1N4148 D29 1N4148 D45 1N4148 RD_1 RD_1 RD_1 D14 1N4148 D30 1N4148 D46 1N4148 KEY/PAD...
  • Page 22 LQVH (VX49) - Level 1 BOM list Part No. Description Qty/pcs 021311400 PUSH ENCODER KNOB FOR AD37 "ROHS" 021497900 16KEY HIGH-RESISTANCE CARBON FILM PET REV:1.2 FOR LQV6 "ROHS" 021616300 16KEY PAD RUBBER FOR LQVH "ROHS" 080252000 MOD WHEEL ASSY FOR AD25 "ROHS"...
  • Page 23 LABEL PET 46*5mm REV.A "ROHS" 1.00 041471000 GTIN14 LABEL 90*42mm "ROHS" 0.40 041616000 COMPLIANCE STICKER REV.A FOR LQVH "ROHS" 1.00 042219107 SAFETY MANUAL REV.1308-G FOR ALESIS "ROHS" 1.00 042616000 USER GUIDE FOR LQVH "ROHS" 1.00 043495000 LL9 CARD REV.A FOR LQV7 "ROHS" 1.00 043495100 ADDITIONAL SOFTWARE POST CARD REV.C FOR LQV7 "ROHS"...
  • Page 24 054497000 EVA BLACK 132*15*2.0mm FOR LQV6 "ROHS" 4.00 054559000 MUTE FOAM 687*8*8 REV:1.0 FOR MK43 "ROHS" 1.00 054616100 EVA 60*12*5mm BLACK FOR LQVH "ROHS" 2.00 058498000 NON-WOVEN FABRICS 687*9*2mm 3M FOR LQV4 "ROHS" 1.00 061359002 CABLE UL2468 24AWG 4PIN (DEL PIN NO.2,3) P=2.5mm L=324mm ONE CONNECTOR "JIA FUEA 1.00 ALT PN: 061359002A...
  • Page 25 ...3 105-LQVH-66 PCB ASSY 24KEYBOARD FOR LQVH "ROHS" 1.00 ..4 061529000 CABLE UL2651 28AWG 16PIN L=550mm GRAY HEADER FC OTHER FD 2.54mm "ZHUOZHI" ZZ-LEA 1.00 ..4 105-LQVH-56 PCB SMD ASSY 24KEYBOARD FOR LQVH "ROHS" 1.00 ..5 023495401 PCB CEM-1 1.6mm 1L 329.1*49.5mm REV:0.11 24KEYBOARD "ROHS" 1.00 ..5 111410000...
  • Page 26 ..4 113235108 RES SMD 0603 1/10W 5% 5.1R "YAGEO" "ROHS" 1.00 ..4 134130470 RES NETWORK SMD 0603*4 1/16W 5% 47R "FENGHUA" "ROHS" 4.00 RP1,3,5,6 ..4 211103016 CAP SMD 1206 CER 1UF 5% 50V "FENG HUA" "ROHS" 1.00 ..4 211115106 CAP SMD 1206 CER 10UF 5% 16V X7R "ROHS" 3.00 C36,37,40 ..4...
  • Page 27 ..4 113118060 RES SMD 0603 1/16W 1% 806R "FENG HUA" "ROHS" 2.00 R120,187 ..4 113118252 RES SMD 0603 1/16W 1% 82.5K "FENG HUA" "ROHS" 1.00 R191 ..4 113130470 RES SMD 0603 1/16W 5% 47R "ROHS" 2.00 R195,196 ..4 113131002 RES SMD 0603 1/16W 5% 10K "FENGHUA" "ROHS" 17.00 R105-114,152-158 ..4...
  • Page 28 ALT PN: 411283403A DIODE SCHOTTKY SMA 3A 40V "FMS" SS34 "ROHS" ..4 421004401 TRANS SOT-23 NPN B.E.C SMALL-SIGNAL "NEXPERIA" PMBT4401 "ROHS" 1.00 Q103 ALT PN: 421004401A TRANS SOT-23 NPN B.E.C SMALL-SIGNAL "GOOD-ARK" "ROHS" ALT PN: 421004401B TRANS NPN SMALL-SIGNAL SOT-23 SM "ON SEMI" MMBT4401LT1G "ROHS" ..4 421004403C TRANS PNP SMALL-SIGNAL SOT-23 SM "ON SEMI"...
  • Page 29 ..4 310107416 IC SMD TSSOP16 "NEXPERIA" 74HC165PW "ROHS" 1.00 U209 ..4 310117414 IC HEX INV SCHMITT TRIG TSSOP-14 "NEXPERIA" 74AHC14PW "ROHS" 1.00 U201 ..4 310174595 IC 8-BIT SHIFT REGISTERS TSSOP16 "TI" SN74LV595APWR "ROHS" 4.00 U205-208 ALT PN: 310174595A IC SMD TSSOP16 SHIFT REGISTER "NEXPERIA" 74HC595PW-T "ROHS" ..4 310607411 IC SCHMIT-TRIGG INV GATE SOT353 "DIODES"...
  • Page 30 ..4 212148225C CAP SMD 0805 CER 2.2UF 10% 25V X5R "SAMSUNG" CL21A225KAFNNNE "ROHS" 1.00 C418 ..4 213119104 CAP SMD 0603 CER 0.1UF 10% 25V X7R "FENGHUA" 0603B104K250NT "ROHS" 18.00 C400-417 ALT PN: 213119104B CAP SMD 0603 CER 0.1UF 10% 25V X7R "SAMSUNG" CL10B104KA8NNNC "ROHS" ..4 311544052A IC SOIC16 "ONSEMI"...
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