Filter
Top Products
5
5
4
4
3
3
2
2
1
1
D
C
B
A
BILAT
TALK
(SHT3,7D)
(SHT2,1D)
BAL
(SHT3,5D)
CH.3
2D)
CH.3
(SHT2,1D)
LISTEN BUFFER
(SHT3,
CH.4
MIC
CH.1
CH 4
(SHT2,1D)
LISTEN
2D)
BUFFER
LISTEN BUFFER
(TO CH 4)
CH 3
(SHT3,2D)
CH.4
(SHT3,
(SHT2,6D)
TALK
4WIRE
OFF
COM
(SHT3,2D)
BUFFER
JACK
CHANNEL 3
2WIRE
ON
CH 2
FRONT PANEL
CHANNEL 4
BUFFER
(TO CH 3)
CH 1
UNBAL
(SHT3,7D)
CHANNEL 2
(SHT3,7D)
CH.2
TALK
TALK
COM
MIC PROGRAMMING
(SHT2,6C)
(SHT2,7A)
4WIRE B
PANEL (SHT2,6D)
BUFFER
TALK CH.1/4W-A
CH.2
UNBAL/BAL
PROGRAMMING
IFB A
(SHT3,5D)
LISTEN
BUFFER
4WIRE
CONN
(SHT2,4D)
(IFB-A)
THRU
4W-B
TALK
2WIRE
MIC
(SHT2,2C)
(SHT3,1B)
IFB B
NOTES: SEE SHEET 3 OF 3
(SHT2,6B)
LOOP
CH.3/
BILAT
4WIRE A
CARB
(SHT2,2C)
(SHT3,1A)
ON
TALK CH.4
TALK
BILATCONN
(SHT2,1D)
(SHT2,1D)
(SHT3,5D)
OFF
3Vpp
CHANNEL 1
CH.1
HEADSET
(SHT2,1D)
(SHT3,7D)
PROGRAMMING
CH.2
(SHT3,2D)
BILAT
BUFFER
(SHT3,5D)
(SHT2,6C)
DYN
(SHT2,1D)
(SHT2,5C)
(IFB-B)
(SHT2,1D)
J/IC_GROUP/ECAD/SCHEMATIC/6245
CK
7/15/01
MOTHERBOARD MCE325
SCHEMATIC DIAGRAM
D
1
9027624501
73521
3
A RELEASE TO FACTORY CK 12/7/00
REVISIONS
LOC
REV
DESCRIPTION
ECO. NODRFT CHKR APP DATE
Title
SIZE
Sheet
of
PLANT DIST:
DWG. NO.
B.E.
P/N
DR.
CHK.
APP.
DATE
SCALE
DO NOT SCALE DRAWING
TELETELEXX
COMMUNICATIONS, INC.
BURNSVILLE, MINNESOTA
THESE DRAWINGS AND SPECIFICATIONS ARE THE
PRPOERTY OF TELEX COMMUINCATIONS, INC.AND
SHALL NOT BE REPRODUCED, COPIED, OR USED
FOR ANY PURPOSE WITHOUT EXPRESS WRITTEN
CONSENT.
ORCAD GENERATED DRAWING
FILE NAME:
+7V
+14V
+14V
+7V
+7V
+7V
+14V
+4.5V
+7V
+7V
+7V
+14V
+7V
+7V
+14V
+14V
+7V
+14V
+14V
+14V
+14V
+7V
+14V
+14V
+14V
+7V
+7V
+14V
+14V
+14V
+7V
+7V
+14V
+7V
+14V
+7V
+14V
+7V
+14V
+14V
+14V
+7V
+7V
+14V
+7V
+14V
R7
301
1%
R83
22K
R84
22K
R9
301
1%
C32
.1/50
R10
3.01K
1%
R85
10K
R88
10K TRIMPOT VM
LIN
C51
.1/50
R13
22K
R89
60.4K
1%
R90
20.0K
1%
R14
22K
R91
60.4K
1%
R15
22K
R16
22K
R92
20.0K
1%
R94
100
R17
100 1/4W
R95
100K
R18
100 1/4W
+
-
U6A
TL072
3
2
1
8 4
R96
22K
+
-
U6B
TL072
5
6
7
R97
47K
+
-
U8A
TL072
3
2
1
8 4
R20
100K
+
-
U8B
TL072
5
6
7
R98
22K
R21
12K
R22
22K
+
-
U7B
TL072
5
6
7
R99
22K
R100
22K
+
-
U7A
TL072
3
2
1
84
R23
22K
R101
10K
+
-
U5A
TL072
3
2
1
84
+
-
U5B
TL072
5
6
7
R104
10K TRIMPOT VM
LIN
P1
1
2
3
R26
5.1M
R105
60.4K
1%
FB4
#73
R106
20.0K
1%
R27
200
FB2
#73
R107
60.4K
1%
R28
22K
C1
100/25
+
R108
20.0K
1%
R29
5.1M
J2
JST-B-6B-ZR
1
2
3
4
5
6
R109
100
R30
100K
R110
100K
R31
5.1M
R32
100K
D6
1N4004
R33
15K
D7
1N4004
R34
22K
D8
1N4004
D9
1N4004
R35
100K
R36
10K
D10
1N4004
R38
100
D11
1N4004
C57
22/50
+
R49
22K
D12
1N4004
D13
1N4004
R11
620
R50
10K
R19
620
R51
22K
C37
100pF
R52
47K
C38
100pF
C39
100pF
R53
22K
R55
22K
C8
.1/50
C40
100pF
R57
10K TRIMPOT VM
LIN
R12
1K
R58
60.4K
1%
C17
1/50
+
C42
10pF
R59
20.0K
1%
C12
10/25
+
C43
.1/50
R24
100K
C44
22/50
+
C3
100/25
+
C45
47/16
+
C4
1nF MONO
C46
22/50
+
C5
100/25
+
J24
929647-01-03
1
2
3
C6
1nF MONO
C47
100pF
C48
100pF
C7
1nF MONO
C49
100pF
C50
100pF
C14
100/25
+
C15
1nF
C22
.1/50
C52
10pF
C53
22/50
+
C18
100pF
C54
47/16
+
C19
100pF
C55
22/50
+
C20
100pF
C56
.1/50
R1
1K
C21
100pF
C23
10pF
J1
JST-B-3B-ZR
1
2
3
C24
.1/50
C25
22/50
+
J4
929647-01-03
1
2
3
C26
47/16
+
J5
929647-01-03
1
2
3
C27
22/50
+
J7
929647-01-03
1
2
3
J6
929647-01-03
1
2
3
C28
100pF
C29
100pF
J8
NC3FDH
1
2
3
J9
NC3MDH
1
2
3
C30
100pF
C31
100pF
J10
NC3FDH
1
2
3
+
-
U1A
NE5532
3
2
1
84
+
-
U1B
NE5532
5
6
7
C33
10pF
C34
47/16
+
R2
2K
R4
100K
C35
22/50
+
R5
100K
C36
22/50
+
R6
1K
D1
1N4004
D2
1N914
RP2F
22K
1 7
RP2B
22K
1 3
D3
1N914
D4
1N914
D5
1N914
RP2E
22K
16
RP3D
100K
7 8
C136
.1/50
RP3B
3 4
D16
1N914
Q3
J305
+
-
U10B
NE5532
5
6
7
D15
1N914
+
-
U10A
NE5532
3
2
1
84
+
-
U9B
NE5532
5
6
7
+
-
U9A
NE5532
3
2
1
84
R61
60.4K
1%
R62
20.0K
1%
R63
100
X0
X1
X
Y0
Y1
Z0
Z1
Y
Z
XX
YY
ZZ
U2
4053
13
12
167
6
8
14
2
1
5
3
15
4
11
10
9
C13
.1/50
Q1
2N5087
R64
100K
C16
.1/50
Q2
2N5210
C58
.1/50
Q4
2N5210
J3
SN37A-14B
R
RB
TB
T
S
1
2
3
4
5
R39
2K
R65
22K
C11
.1/50
C9
.1/50
R40
30K
Q5
2N5210
R66
47K
J28
M-114B
R
T
S
1
2
3
4
5
R67
22K
C10
.1/50
R68
22K
C41
.1/50
RP2I
22K
1 10
R41
470K
R8
3.01K
1%
R69
22K
RP2D
22K
1 5
C59
100pF
R70
10K
D14
1N914
RP1D
100K
7 8
R73
10K TRIMPOT VM
LIN
RP1B
3 4
R42
100K
R74
60.4K
1%
R75
20.0K
1%
RP1C
5 6
X0
X1
X
Y0
Y1
Z0
Z1
Y
Z
XX
YY
ZZ
U3
4053
13
12
167
6
8
14
2
1
5
3
15
4
11
10
9
RP2A
22K
12
X0
X1
X
Y0
Y1
Z0
Z1
Y
Z
XX
YY
ZZ
U4
4053
13
12
167
6
8
14
2
1
5
3
15
4
11
10
9
R76
60.4K
1%
RP2C
22K
14
R77
20.0K
1%
R78
100
R3
100
R79
100K
C2
10/25
+
RP3C
5 6
R80
22K
R81
47K
FB3
#73
R37
10K TRIMPOT
LIN
R82
22K
FB1
#73
HMS/PMS
HP L
REM MIC
VOX REC
CARB MIC
LSN4
CALL 1
SIDETONE
MIC LO
KEY4
MIC PRE/LIMITER
CARBON MIC SENSE
TC2
PGMB
DIFF MIC PRE AMP (+20dB)
CALL 3
MIC HI
TC4
KEY3
KEY2
USM
LSN1
LSN2
TC3
KEY1
CALL 2
TC1
PGMA
CALL 4
HP R
PM HI
LSN3