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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
1 2 3 4 5 6 78
A
B
C
D
E
8
7654321
E
D
C
B
A
B
APPROVED: Dw
g
#
Size
Drawn B
y
Rev.
D
10S8210-2.sch
10s8210
DLM-821
(
Channels 1-2
)
James B Franks
Sheet # of
26
847 Holt Road
Webster, NY 14580-9103
Phone: Fax:
(716) 872-0010
(716) 872-0739
Print Date
22-Jan-2004
11:44:12
A->B @ 157%
C
R103
1.15k
R104
1.15k
R108
1.15k
R105
1.15k
R106
39.2k
R107
39.2k
C104 27p
C103
27p
5
6
7
U101B
2043
3
2
1
8 4
U101A
2043
D103
1N4148
D104
1N4148
R110
10.0k
R109
10.0k
R112
10.0k
R111
10.0k
C106 27p
C105
27p
R113
5.6k
R114
5.6k
R115
5.6k
R116
5.6k
VR101A
B20k
VR101B
B20k
VR101D
B20k
VR101C
B20k
7
8
9
SW102C
10
11
12
SW102D
Right/Mono/Mic
Left
Channel 1
Mic/Line
Mic/Line
Level
Level
Pan
In-Mic
In-Mic
5
6
4
SW101B
10
11
12
SW101D
In
In
Channel 1 Mute
In = Channel On
A
B
D
C
Four-Ganged Pot
CW
C107
.1U
C108
.1U
-18
+18
1
2
3
7
8
9
4
5
6
10
11
12
AB
DC
4PDT Switch
R59
1K
R60
1K
CH1 Det
1
2
3
J1
5
6
7
U2B
TLE2064
3
2
1
84
U13A
NJM2903
5
6
7
U17B
NJM2903
C27
47U
R73
33K
+18
D4
1N4148
C30
.1U
R1
1M
R61
560
R62
1K
R36
33K
R74
18K
+18 +18
/ATTN
R77
10M
Q2
2N4123
Q1
2N4125
R76
470K
5mA Typ.
C31
47U
D6
1N746A
5
6
4
SW DPDT
VCA-DC
2
3
1
SW3A
RPeak
6
5
4
3
2
1
J101
EUROBLOCK 6
2
3
1
SW104A
SW DPDT
5
6
4
SW104B
SW DPDT
-18
+18
LPeak
RBus
LBus
2
3
1
SW103A
SW DPDT
5
6
4
C101
47U
C102
47U
R101
3.3K
R102
3.3K
+18
10
9
8
U2C
TLE2064
R119
390K
R118
100K
R117
100K
CH1 Det
Stereo/Mono
Phantom Pwr
R203
1.15k
R204
1.15k
R208
1.15k
R205
1.15k
R206
39.2k
R207
39.2k
C204 27p
C203
27p
5
6
7
U201B
2043
3
2
1
8 4
U201A
2043
D203
1N4148
D204
1N4148
R210
10.0k
R209
10.0k
R212
10.0k
R211
10.0k
C206 27p
C205
27p
R213
5.6k
R214
5.6k
R215
5.6k
R216
5.6k
VR201A
B20k
VR201B
B20k
VR201D
B20k
VR201C
B20k
5
6
4
SW202B
10
11
12
SW202D
Right/Mono/Mic
Left
Channel 2
Mic/Line
Mic/Line
Level
Level
Pan
In-Mic
In-Mic
5
6
4
SW201B
10
11
12
SW201D
In
In
Channel 2 Mute
In = Channel On
C207
.1U
C208
.1U
-18
+18
RPeak
6
5
4
3
2
1
J201
EUROBLOCK 6
2
3
1
SW204A
SW DPDT
5
6
4
SW204B
SW DPDT
-18
+18
LPeak
RBus
LBus
C201
47U
C202
47U
R201
3.3K
R202
3.3K
12
13
14
U2D
TLE2064
R219
390K
R218
100K
R217
100K
Stereo/Mono
Phantom Pwr
Ducker Detector
(0 dBu Threshold)
Stereo = Out Stereo = Out
CH2 Detect Enable
Ducker Enable
+18SW1
+18SW1
1
2
3
J6
VREF
5
6
7
U13B
NJM2903
Q7
2N4123
+18
R75
100K
Q6
2N4125
Q5
2N4125
R81
18K
-18
D8
1N4148
R72
10K
CH2 Mute
+18
VREF
3
2
1
11 4
U2A
TLE2064
3
2
1
84
U17A
NJM2903
C43
47U
R78
33K
R80
1M
D7
1N4148
C34
.1U
VREF
1
3
2
Q3
J110
1
3
2
Q4
J110
CH2 Mute
CH2 Mute
/ATTN
/ATTN
D22
1N5818
-18
+18
J7
J12
(-30 dBu Line)
C110
47U
C109
47U
C210
47U
C209
47U
C8
27P
Ducking Level
-90dB -20dB
C7
27P
C1
None
C2
None
C20
.1U
1
2
3
J16
J13
+18
(-60 dBu Mic)