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Alesis MidiVerb IV Service Manual

19

03/05/99

Service Parts List (continued)

MTL

9-03-1036

LUG SOLDER PCB MNT

5

MAIN

PLS

9-15-0087

KNOB DATA M4

1

PLS

9-15-0089

BEZEL FRONT PANEL B M4

1

PLS

9-15-0091

BEZEL DISPLAY M4

1

PLS

9-15-1078

BUTTON POWER Q2/S4/M4

1

PLS

9-15-1117

EXTENDER SWITCH Q2

1

PLS

9-23-1055

KEYPAD RUBBER M4

1

PLS

9-15-0088

BEZEL FRONT PANEL A M4

1

RES

0-00-0302

RES 3K OHM 1/8W 5%

2

MAIN

SMC

1-50-0220

CAP 22 PF NPO 1206

2

MAIN

C22, 23

SMC

1-50-0270

CAP 27 PF NPO 1206

2

MAIN

C40, 41

SMC

1-50-1500

CAP 150 PF NPO 1206

4

MAIN

C30, 31, 37, 39

SMC

1-51-0104

CAP 0.1 MF X7R 1206

24

MAIN

C21, 25, 27-29, 32-36, 38, 42-45, 46-54

SMC

1-51-0105

CAP 0.01 MF X7R 1206

2

MAIN

C24, 26

SMC

1-51-0104

CAP 0.1 MF X7R 1206

1

FP

C1

SMI

2-27-0031

ASIC DIG FX M4

1

MAIN

U9

SMI

2-67-5168

IC 8K x 8 SRAM (LH5168N-10L)

1

MAIN

U10

SMI

2-67-6228

IC HM628128LFP-10 SRAM SMD

1

MAIN

U11

SMI

2-70-8032

IC 80C31 PQFP SMD

1

MAIN

U14

SMI

2-75-4319

IC AK4318A DUAL 18-BIT DAC

1

MAIN

U12

SMI

2-75-7360

IC SAA7360 ADC PQFP-44 SMD

1

MAIN

U13

SMI

2-64-7400

IC 74HC00 QUAD 2-IN POS-NAND GATE

1

MAIN

U15

SMI

2-71-0084

IC TL084 QUAD OPAMP SMD

2

MAIN

U7-8

SMI

2-64-0138

IC 74HC138 DEMUX/DEC SMD

1

FP

U3

SMM

2-50-4148

DIODE SIGNAL 1N4148 SMD

5

MAIN

D7-D11

SMM

2-51-4401

TRANS 2N4401 NPN SMD

3

MAIN

Q1-3

SMM

2-50-4148

DIODE SIGNAL 1N4148 SMD

12

FP

D9-19, 26

SMR

0-10-0047

RES 4.7 OHM 1/8W 5% 1206

2

MAIN

R56, R60

SMR

0-10-0100

RES 10 OHM 1/8W 5% 1206

3

MAIN

R34, 35, 52

SMR

0-10-0102

RES 1K OHM 1/8W 5% 1206

11

MAIN

R3, 4, 8, 13, 14, 20, 22, 24, 25, 33, 36

SMR

0-10-0103

RES 10K OHM 1/8W 5% 1206

12

MAIN

R21, 29, 37-40, 45-47, 49, 63, 64

SMR

0-10-0105

RES 1M OHM 1/8W 5% 1206

5

MAIN

R9, 12, 27, 61, 62

SMR

0-10-0151

RES 150 OHM 1/8W 5% 1206

4

MAIN

R42, 43, 50, 51

SMR

0-10-0152

RES 1.5K OHM 1/8W 5% 1206

1

MAIN

R2

SMR

0-10-0202

RES 2K OHM 1/8W 5% 1206

5

MAIN

R5-7, 10, 11

SMR

0-10-0203

RES 20K OHM 1/8W 5% 1206

8

MAIN

R1, 31, 32, 41, 44, 66-68

SMR

0-10-0221

RES 220 OHM 1/8W 5% 1206

6

MAIN

R15-19, 23

SMR

0-10-0240

RES 24 OHM 1/8W 5% 1206

1

MAIN

R65

SMR

0-10-0471

RES 470 OHM 1/8W 5% 1206

7

MAIN

R28, 53-55, 57-59

SMR

0-10-0512

RES 5.1K OHM 1/8W 5% 1206

2

MAIN

R26, 30

SMR

0-11-0153

RES 15K OHM 1/8W 1% 1206

1

MAIN

R48

SMR

0-10-0221

RES 220 OHM 1/8W 5% 1206

1

FP

R7

SMR

0-10-0622

RES 6.2K OHM 1/8W 5% 1206

1

FP

R5

SMR

0-10-0682

RES 6.8K OHM 1/8W 5% 1206

4

FP

R1-4

SMR

0-10-0903

RES 91K OHM 1/8W 5% 1206

1

FP

R6

SWT

6-02-0002

SWITCH DPDT

1

MAIN

SW1

TRN

2-03-4401

TRANS 2N4401 NPN

2

MAIN

Q4, Q5

Содержание MIDIVERB IV

Страница 1: ...Alesis MidiVerb IV Service Manual i 03 05 99 Alesis MIDIVERB IV STEREO EFFECTS PROCESSOR Service Manual V 1 00 6 13 95...

Страница 2: ...ervices or repairs were done in accordance with the Manual All service or repairs done by you or with reference to the Manual shall be solely your responsibility and Alesis shall have no liability for...

Страница 3: ...ch accompanies the product CAUTION Danger of explosion if battery is incorrectly replaced Replace only with the same type or equivalent type recommended by the equipment manufacturer Battery Manufactu...

Страница 4: ...stoves heat registers radiators or other heat producing equipment 7 Ventilation When installing the product make sure that the product has adequate ventilation Improperly ventilating the product may c...

Страница 5: ...as capacitors that begin to leak excess current after a significant amount of time 5 Cable Checks Wiggling cables can reveal intermittent failures such as loose cables or poorly soldered headers Remem...

Страница 6: ...s 3 5 10 RESET 3 5 20 M4 ASIC 3 6 00 The Front Panel 5 6 10 The Keypad 5 6 20 Display LEDs 5 6 30 Disassembly 5 7 00 Test Procedures 7 7 10 Self Test 7 7 20 Further Testing 7 8 00 Troubleshooting 8 9...

Страница 7: ...for use by the LCD 2 10 Battery Backup Battery backup is actually more complicated than it might first appear as it depends on a good system reset see section 5 10 for details in order to function pr...

Страница 8: ...filters for the internal voltage reference C35 along with R34 and R35 act as filters for the negative and positive internal DAC reference inputs Analog power is supplied through current limiters R52...

Страница 9: ...the M4 ASIC When the raw supply reaches approximately 7 volts the transistor will turn on causing the reset line to drop low The opposite should occur on power down transistor turns off at 7V threshol...

Страница 10: ...control of the M4 ASIC 44 SRAMWR SRAM WRite enable Enables writing to the SRAM directly under the control of the M4 ASIC 19 M12CLK 12 Mhz CLocK 20 M3CLK 3 Mhz CLocK 21 LRCLK Left Right CLocK Used to...

Страница 11: ...front panel LEDs go bad they should be fairly easy to replace using the disassembly procedure outlined below If all of the LEDs are dead then the 74HC138 U3 is probably bad and should be replaced fir...

Страница 12: ...Alesis MidiVerb IV Service Manual 6 03 05 99 Diagram 1 Diagram 2...

Страница 13: ...next test A ROM CHECKSUM Checks the ROM s checksum for accuracy and immediately proceeds to the next test A MIDI TEST Checks MIDI I O and immediately proceeds to the next test A RAM TEST Checks intern...

Страница 14: ...ize memory and retest Power unit up while holding A and D Faulty SRAM Reinitialize memory and retest Power unit up while holding A and D Faulty LCD Module Test with known good front panel Replace if n...

Страница 15: ...Alesis MidiVerb IV Service Manual 9 03 05 99 9 00 Schematics...

Страница 16: ...Alesis MidiVerb IV Service Manual 10 03 05 99...

Страница 17: ...Alesis MidiVerb IV Service Manual 11 03 05 99...

Страница 18: ...Alesis MidiVerb IV Service Manual 12 03 05 99...

Страница 19: ...longer compatible with older versions The REVERSE REVERB Configuration has been renamed to NONLINEAR It is the same as the old Configuration except now it has a Dir Reverb Direction parameter which ca...

Страница 20: ...erb IV Service Manual 14 03 05 99 Renamed User 106 from Model147 to Model122 Now to finish the Switch Encoder Test you press Page A it used to be Input Output V1 00 11 19 94 Checksum 77C8 First Produc...

Страница 21: ...the MIDI channel of a MidiVerb 4 it can use transmit the MIDI universal system exclusive inquiry message with the channel byte set to 7F ALL CALL The MidiVerb 4 will respond with a universal system ex...

Страница 22: ...Nibble Footswitch Mode see Footswitch Modes System Status Byte see System Status Byte Modulator Definitions 0 Pitch Bend 1 Aftertouch 2 Note Number 3 Velocity 4 Controller 0 123 Controller 119 Modulat...

Страница 23: ...ays zero Configuration 0 31 8 Byte Name 16 Parameters nibblized so transmit as 32 bytes ALL USER PROGRAMS DATA The All User Programs data consists of 128 Program Data Blocks defined above SINGLE PROGR...

Страница 24: ...P ZNC 1 HOLDS REGULATOR 7805 TO PCB HDW 5 02 6320 NUT KEP 6 32 1 HOLDS REGULATOR 7805 TO PCB IC 2 31 0060 IC SOFTWARE VER 1 03 EPROM M4 1 MAIN U2 IC 2 27 0032 ASIC POT 4 CHANNEL DIGITAL M4 1 IC 2 11 7...

Страница 25: ...P SMD 2 MAIN U7 8 SMI 2 64 0138 IC 74HC138 DEMUX DEC SMD 1 FP U3 SMM 2 50 4148 DIODE SIGNAL 1N4148 SMD 5 MAIN D7 D11 SMM 2 51 4401 TRANS 2N4401 NPN SMD 3 MAIN Q1 3 SMM 2 50 4148 DIODE SIGNAL 1N4148 SM...

Страница 26: ...Alesis MidiVerb IV Service Manual 20 13 00 Service Manual History 6 13 95 V1 00 1st Release...

Страница 27: ...CDATA 4 data buss 3 DATA KNOB 7 DataDisk 7 digital supply 2 digital to analog 2 DigPot 3 8 DigPots 1 2 7 DSPSRAMOE 4 E encoder 5 7 14 18 22 EPROM 3 7 F FROMADC 2 4 front panel 3 5 7 8 19 I I O ports 3...

Страница 28: ...XD 3 S S1 1 sample and hold 2 Sigma Delta 2 SRAM 1 3 4 7 8 19 SRAMA0 16 4 SRAMCE 3 SRAMD0 7 4 SRAMWR 4 standby current 1 stereo output 2 SWITCHES ENCODER 7 T Transmit Serial Data 3 TXD 3 U U10 3 19 U1...

Страница 29: ...Alesis MidiVerb IV Service Manual 23 03 05 99 NOTES...

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