Mackie D8B, Service Manual

Page: 71 / 125

114-4
DSP BOARD 114 REV C
©1998 Mackie Designs Inc. All rights reserved
R21
NC
R33
NC
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R15
R22
R35
R70
R105
R140
R175
R216
R251
R371
R406
R441
R476
R511
R546
R581
R616
R651
R686
R721
R756
R791
R826
R861
R19
R26
R39
R74
R109
R144
R179
R220
R340
R375
R410
R445
R480
R515
R550
R585
R620
R655
R690
R725
R760
R795
R830
R865
R184
R186
R42
R77
R112
R147
R188
R223
R343
R378
R413
R448
R483
R518
R553
R588
R623
R658
R693
R728
R763
R798
R833
R868
R181
R182
R40
R75
R110
R145
R180
R221
R341
R376
R411
R446
R481
R516
R551
R586
R621
R656
R691
R726
R761
R796
R831
R866
R183
R185
R41
R76
R111
R146
R187
R222
R342
R377
R412
R447
R482
R517
R552
R587
R622
R657
R692
R727
R762
R797
R832
R867
R303
R327
R62
R97
R132
R167
R208
R243
R363
R398
R433
R468
R503
R538
R573
R608
R643
R678
R713
R748
R783
R818
R853
R888
R31
R32
R67
R102
R137
R172
R213
R248
R368
R403
R438
R473
R508
R543
NC
R613
R648
R683
R718
R753
R788
R823
R858
R893
R304
R328
R63
R98
R133
R168
R209
R244
R364
R399
R434
R469
R504
R539
R574
R609
R644
R679
R714
R749
R784
R819
R854
R889
R16
R23
R36
R71
R106
R141
R176
R217
R252
R372
R407
R442
R477
R512
R547
R582
R617
R652
R687
R722
R757
R792
R827
R862
R17
R24
R37
R72
R107
R142
R177
R218
R338
R373
R408
R443
R478
R513
R548
R583
R618
R653
R688
R723
R758
R793
R828
R863
R18
R25
R38
R73
R108
R143
R178
R219
R339
R374
R409
R444
R479
R514
R549
R584
R619
R654
R689
R724
R759
R794
R829
R864
IS_1 WR5_1 CLK_1 DTO_U1 DRO_U1 DT1_U1 DR1_U1 LRCLK_1 FSYNC_1 SCLK_1
IS_2 DTO_U2 DRO_U2 DT1_U2 DR1_U2 " " "
IS_3 DTO_U3 DRO_U3 DT1_U3 DR1_U3 " " "
IS_4 DTO_U4 DRO_U4 DT1_U4 DR1_U4 " " "
IS_5 DTO_U5 DRO_U5 DT1_U5 DR1_U5 " " "
IS_6 DTO_U6 DRO_U6 DT1_U6 DR1_U6 " " "
IS_7 WR5_2 CLK_2 DTO_U7 DRO_U7 DT1_U7 DR1_U7 LRCLK_2 FSYNC_2 SCLK_2
IS_8 DTO_U8 DRO_U8 DT1_U8 DR1_U8 " " "
IS_9 DTO_U9 DRO_U9 DT1_U9 DR1_U9 " " "
IS_10 DTO_U10 DRO_U10 DT1_U10 DR1_U10 " " "
IS_11 DTO_U11 DRO_U11 DT1_U11 DR1_U11 " " "
IS_12 DTO_U12 DRO_U12 DT1_U12 DR1_U12 " " "
IS_13 WR5_3 CLK_3 DTO_U13 DRO_U13 DT1_U13 DR1_U13 LRCLK_3 FSYNC_3 SCLK_3
IS_14 DTO_U14 DRO_U14 NL NL " " "
IS_15 DTO_U15 DRO_U15 NC METER_DR " " "
IS_16 DTO_U16 DRO_U16 NL NL " " "
IS_17 DTO_U17 DRO_U17 " " "
IS_18 DTO_U18 DRO_U18 " " "
IS_19 WR5_4 CLK_4 DTO_U19 DRO_U19 LRCLK_4 FSYNC_4 SCLK_4
IS_20 DTO_U20 DRO_U20 " " "
IS_21 DTO_U21 DRO_U21 " " "
IS_22 DTO_U22 DRO_U22 " " "
IS_23 DTO_U23 DRO_U23 " " "
IS_24
MIX_1
MIX_2
MIX_3
MIX_4
MIX_5
MIX_6
MIX_7
MIX_8
MIX_9
MIX_10
MIX_11
MIX_12
MIX_13
MIX_14
MIX_15
MIX_16
MIX_17
MIX_18
MIX_19
MIX_20
MIX_21
MIX_22
MIX_23
MIX_24 DTO_U24 DRO_U24 "
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U1 shown
U2
U3
U4
U5
U6
U7
U8
U9
U10
U11
U12
U13
U55B
U49A
U55D
U49C
U53A
U59B
U53D
U59C
U62A
U65A
U62C
U65C
U68A
U55A
U49B
U55C
U49D
U53B
U59A
U53C
U59D
U62B
U65B
U62D
U65D
U68B
U56
U44
U50
U57
U60
U63
U66
U69
U72
U75
U78
U81
U84
U54
U26
U39
U51
U58
U61
U64
U67
U70
U73
U76
U79
U82
U14
U15
U16
U17
U18
U19
U20
U21
U22
U23
U24
U71A
NC
U71C
U74A
U77A
U74C
U77C
U80A
U83A
U80C
U83C
U71B
U68D
U71D
U74B
U77B
U74D
U77D
U80B
U83B
U80D
U83D
U87
U90
U93
U96
U99
U102
U105
U108
U111
U114
U117
U85
U88
U91
U94
U97
U100
U103
U106
U109
U112
U115
This table from Hull shows the difference in reference designators and labels between the DSP
schematics. To use it, first look at the schematic showing U1 on the previous page and look for the
component of interest. For example:
To find the resistor in the U17 circuit which does the same thing as R184 in the U1 circuit:
Look on the top row (U1) for R184 (circled) and then go down that column until you find the
resistor for the U17 circuit, which is R623.
There are a few points:
Only the U1 circuit uses R21 and R33.
Only the U15 circuit has one less IC.
NC stands for No Connection, or not connected, or just plain not there.
NL stands for No Label, that is, the junction shown in the U1 schematic is still there but it has no label.