Mackie D8B, Service Manual, Page: 62 / 125

113-1
CODEC BOARD 113 REV B
©1998 Mackie Designs Inc. All rights reserved
POINT F
SEE TABLE
POINT H
POINT I
POINT G
POINT J
IC
PARTS RANGE
U3
IN THE 10'S
U103
Schematic
shown
IN THE 100'S
U203
IN THE 200'S
TABLE OF DIFFERENCES
WHERE THE CHANNELS ARE OTHERWISE IDENTICAL
NOTE: THE CIRCUIT FOR U4 (WHICH IS FOR METER-LEFT AND METER-RIGHT) HAS PART NUMBERS
WHICH DO NOT FOLLOW THE NORMAL 100, 200, 300 MACKIE WAY, SO THIS PARTICULAR CIRCUIT IS SHOWN ON SHEET 2
NOTE:
LINE-13 TO LINE-24 CONNECT TO J3
RET-1 TO RET-12 CONNECT TO J1
DR1 TO DR8, AND METER_DRV CONNECT TO J13
DR9 TO DR12 CONNECT TO J12
SEE SHEET 2 FOR CONNECTOR DETAILS
U303
IN THE 300'S
POINT H POINT I
LINE-14 GND LINE-14
POINT J
DR1
POINT F POINT G
LINE-13 GND LINE-13
LINE-16 GND LINE-16 LINE-15 GND LINE-15
LINE-18 GND LINE-18 LINE-17 GND LINE-17
LINE-20 GND LINE-20 LINE-19 GND LINE-19
DR2
DR3
DR4
C4 C3 R22 R23 R26 R53
C18 C17 R63 R74 R76 R78 R40
C8 C7 R7 R19 R20 R21 R16
C28 C21 R83 R84 R85 R86 R41
C32 C31 R91 R92 R93 R94 R42
C40 C39 R119 R120 R121 R122 R44
C36 C35 R99 R100 R103 R104 R43
C44 C43 R129 R130 R131 R132 R45
C48 C47 R137 R138 R139 R140 R46
C72 C71 R174 R176 R178 R179 R48
C66 C65 R145 R146 R147 R148 R47
C76 C75 R184 R185 R186 R187 R49
C80 C79 R192 R193 R194 R195 R50
C20 C19 R79 R80 R81 R82
C30 C29 R87 R88 R89 R90
C6 C5 R3 R4 R5 R6
U403
IN THE 400'S
U503
IN THE 500'S
U603
IN THE 600'S
U703
IN THE 700'S
LINE-22 GND LINE-22 DR5 LINE-21 GND LINE-21
LINE-24 GND LINE-24 LINE-23 GND LINE-23
RET-2 GND RET-2 RET-1 GND RET-1
RET-4 GND RET-4 RET-3 GND RET-3
DR6
DR7
DR8
C38 C37 R105 R106 R107 R116
C42 C41 R123 R126 R127 R128
C46 C45 R133 R134 R135 R136
C34 C33 R95 R96 R97 R98
U803
IN THE 800'S
U903
IN THE 900'S
U1003
IN THE 1000'S
U1103
IN THE 1100'S
RET-6 GND RET-6 DR9 RET-5 GND RET-5
RET-8 GND RET-8 RET-7 GND RET-7
RET-10 GND RET-10 RET-9 GND RET-9
RET-12 GND RET-12 RET-11 GND RET-11
DR10
DR11
DR12
C70 C68 R149 R150 R153 R163
C74 C73 R180 R181 R182 R183
C78 C77 R188 R189 R190 R191
U4
SEE SHEET 2
METER-L GND METER-L METER-R GND METER-R METER_DR
SEE SHEET 2 SEE SHEET 2
C50 C49 R141 R142 R143 R144
About this table:
The circuit is repeated 12 times on the CODEC
board, so instead of wasting paper and disk
space, this table was created. It shows the
difference between the reference designators
and the main points from one circuit to the next.
In most case, the reference designators vary
only in the hundreds, for example R103, R203,
and R503 etc.
The "Parts H" and "Parts F" do not follow this
rule, and the following example may help:
Using the U103 circuit shown, find C4 (circled
under Parts F). The reference designator for the
same part used on the U403 circuit is C34, and
for the U703 circuit it is C46, reading in the
column below C4.
Note that all the parts values remain the same
from one circuit to the next, ohms, farads, pica-
noodles, foot-lamberts etc.
THIS CIRCUIT IS REPEATED 12 TIMES.
THE REF DESIGNATORS AND LABEL
DIFFERENCES BETWEEN THE CIRCUITS ARE
SHOWN IN THE TABLE BELOW
Sheet 1 of 4
U3
U503
U4
U1
RES K
RES K
U2
U501
U502
U601
U602
U1101
U1102
J3
J13
J12
J1
U603
U1103