Arrow Storage Products RH1014-C1 Outdoor Storage User Manual

DLM-821
Stereo
Ducking Line/Microphone
Mixer
Operating Manual
ASHLY AUDIO INC.
847 Holt Road Webster, NY 14580-9103 Phone: (585) 872-0010
Toll-Free: (800) 828-6308 Fax: (585) 872-0739
www.ashly.com
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
Table Of Contents
1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3
AC POWER REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4
SECURITY COVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6
CONNECTIONS AND CABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7
TYPICAL APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 Small Sound Reinforcement System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Church, School Or Meeting Room Sound System . . . . . . . . . . . . . . . . . . . . . . . . .
7.3 Restaurant/Sports Bar System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
TROUBLESHOOTING TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
9
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7
7
7
8
10 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
11 WARRANTY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
12 SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-15
2
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
1. INTRODUCTION
2. UNPACKING
Congratulations on your purchase of an Ashly
DLM-821 stereo ducking line level mixer. Features include
eight balanced stereo inputs for line level sources, the first
four inputs with switchable 30dB gain for low impedance
microphones. +18V phantom power and stereo/mono switching is provided for inputs 1 through 4. A concentric level
and pan control for each input adjusts channel volume and
stereo position.
As a part of our system of quality control, every
Ashly product is carefully inspected before leaving the
factory to ensure flawless appearance. After unpacking,
please inspect for any physical damage. Save the shipping carton and all packing materials , as they were carefully designed to reduce to minimum the possibility of
transportation damage should the unit again require packing and shipping. In the event that damage has occurred,
immediately notify your dealer so that a written claim to
cover the damages can be initiated.
A ducking circuit allows a signal on either channel
1 or 2 to duck (attenuate) the signal on channels 3 through
8. Internally the DLM-821 can be configured for ch.1 priority whereby a signal on ch. 1 has priority over the signal
on ch. 2 and fully attenuates channels 2 through 8. Furthermore, the ducking level can be configured for -20dB or
-90dB, ch. 2 ducking may be disabled, and the left and right
signal ducking may be disabled independently. Ultra low
noise summing amplifiers combine the channel signals for
the main outputs. A pair of 6-segment LED meter arrays
monitor the main output levels. Separate level controls are
provided for stereo, mono, and headphone outputs.
The right to any claim against a public carrier
can be forfeited if the carrier is not notified promptly and
if the shipping carton and packing materials are not available for inspection by the carrier. Save all packing materials until the claim has been settled.
3. AC POWER REQUIREMENTS
The DLM-821 will perform normally from 98 to
125 volts AC. Use only properly grounded AC receptacles. To reduce the risk of ground loop hum, use a central point for system AC power distribution. The AC line
fuse is internal, and should only be changed by a qualified service technician.
4. SECURITY COVERS
For installations where it is desirable to protect
the front panel controls from tampering or accidental
misadjustment, use the Ashly security cover, which is
available in both single and double rack space sizes. Installation is simple and does not require removal of the
equipment from your rack. See your Ashly dealer for
details.
3
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
5. CONTROLS
5.1 Ducking Enable
Pressing this switch enables a signal present on
inputs 1 or 2 to duck (attenuate) the signals on inputs 3
through 8. See sections 5.14 through 5.17 for internally
selecting different ducking configurations.
5.2 Channel Level and Pan
The inner knob is the individual channel volume
control which feeds a channel to the main mix. The "5"
position corresponds to unity gain. The outer knob is the
Pan control and adjusts the position of the channel in the
stereo mix.
5.5 Output Meters
A pair of peak detecting 6-segment LED meters
are used to indicate output level. Green LED's are used
below 0 VU, yellow above 0 VU, and red LED's indicate
clipping. This meter pair monitors the main stereo output (0 VU = +4dBu). The red clipping LED's also monitor all input channels, making it possible for these
indicators to illuminate even with the stereo output level
turned off.
5.6 Stereo Output Level and Pan
This is the main master gain which sets the operating level for the entire mixer. The "5" position corresponds to unity gain. This control does not effect the
mono output level.
5.3 Mute Switch
5.7 Stereo Output Mute
This switch on each channel will turn the channel completely off allowing the channel level to remain
at its desired setting when the input is not needed.
5.4 Mic/Line Switch
This recessed switch on the first four inputs increases the channel input sensitivity by 30 dB to allow
the use of low impedance microphones. The adjacent
yellow LED on indicates the switch is depressed and 30dB
of gain is added for that channel's mic input.
4
This switch entirely mutes the main stereo output. The headphone and mono output are not affected.
This is particularly useful when the DLM-821 is used as
a sub-mixer.
5.8 Mono and Headphone Level
The inner knob is the master gain control for the
mono output, which is the combined signal of the left
and right outputs. It has no effect on the stereo output.
Note: The mono output level can be selected between
mic or line level. (see sec. 5.10) The outer knob is the
level control for the front panel headphone jack.
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
5.9 Power Switch
The DLM-821 power switch is on the back panel.
When it is pressed in the front panel power LED will become lit.
Internal PCB Jumper Options:
5.13 Ch. 2 Detect Enable *
Internal jumper J1 allows enabling or disabling
the ducker detector for ch. 2. (factory default is enabled)
5.10 Mono Output Mic/Line Switch
5.14 Ducking Level *
This switch selects between a 0dBu (out position) line level or -40dBu (in position) mic level signal
feeding the Mono output connector.
Internal jumper J16 allows selection between
-20dB ducking level and -90 dB ducking level. (factory
default is -20dB)
5.11 Stereo/Mono Input Switches
5.15 Ch. 1 Priority *
These four pushbutton switches allow selection
between a stereo or mono signal connection to input channels 1 through 4 respectively. In the Out position, stereo
left and right cables should be connected. In the in position, a mono cable should be connected to the R(Mono)
connector which then internally feeds the signal to both
left and right sides.
Internal jumper J6 allows enabling ch. 1 to have
priority over ch. 2 and fully attenuate channels 2-8. This
feature is useful for applying an emergency page or alarm
on channel 1 and applying a normal host page input on
ch. 2. (factory default is ch.1 priority disabled)
5.16 Left and Right Ducking Enable *
5.12 Phantom Power Switches
There is a phantom power switch for channels 1
and 2 and a phantom power switch for channels 3 and 4.
Pushing the switch in applies +18VDC to the (+) and (-)
input terminals of the two associated channels to power
condenser mics. The input channels should be muted
using the On/Mute switches when switching phantom
power on or off to avoid any pop noises.
Internal jumpers J14 and J15 allow the left and
right signal ducking to be enabled or disabled independently. (factory default is left and right ducking enabled)
* For internal jumper adjustments, remove AC
cord from rear of unit and refer to a qualified service
technician. (see PCB jumper locations in fig. 5.2)
5
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
Ashly Audio Inc.
Fig. 5.2 - DLM-821 Internal Jumper Locations
6. CONNECTIONS AND CABLES
6.1 Inputs
The DLM-821 stereo inputs use two 20k ohm balanced (10k ohm unbalanced)
Euroblock connectors per channel. Wire the (+) signal to the (+) terminal, the (-) signal
to the (-) terminal, and the shield to G. If an unbalanced (two conductor) input signal is
used, connect the shield to both (-) and G.
To drive a mono source into the stereo mix, simply plug the signal into the
right channel input and press the Mono switch in. Additionally, channels 1 through 4
are switchable to mic level (see sec. 5.4) to add 30dB gain for microphone inputs.
6.2 Main and Mono Outputs
Outputs are 200 ohm "pseudo-balanced" Euroblock connectors, which have balanced impedance with a single-ended signal source and can be wired balanced or unbalanced. Nominal operating level is +4 dBu and maximum level is +23dBu. The
Mono output is switchable to a nominal -40dBu microphone level. If wiring an output
as unbalanced, use the (+) and G connections.
If low level and high level lines (e.g., microphones and mixer line outputs), or
if either of these lines and speaker cables are run parallel for long distances, crosstalk
may be significant. In fact, the crosstalk (signal leakage between cables) can cause an
electronic feedback loop, oscillation, and possibly damage to the equipment. To minimize crosstalk, physically separate low level (microphone) cables from speaker cables
by the greatest feasible distance. At any point where cables meet, run low level cables
perpendicular to high level or speaker cables. If low and high level or speaker cables
must be run parallel and in close proximity to one another, they should be bundled
separately. Shielded cable should always be used for mic and line cables.
6
+ -
G
+-
G
Unbalanced
Input
+ -
G
Euroblock
Input
Connections
+ -
+-
G
Balanced
Input
G
+
G
Unbalanced
Output
+ -
G
Euroblock
Output
Connections
+ -
G
Balanced
Output
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
7. TYPICAL APPLICATIONS
7.1 Small Sound Reinforcement System
In the setup shown here, the DLM-821 is used to mix typical sound sources that might be found in a small
club, school theater or similar environment. INPUT channels 1 & 2 are used for microphones for live vocal or instrumental pickup. INPUT channels 3-8 are used for the output of electronic music devices such as keyboards, MIDI
sound modules, drum machines, etc. The power amplifier (or any additional graphic equalizers or electronic crossovers which may be used) is fed from the MAIN OUTPUT connectors.
Left and Right
Speakers
Stereo
Power Amplifier
Microphone
Inputs
On Ch. 1 and 2
(Mono Switch In)
Stereo Keyboard Input
On Ch. 3
Cassette Tape
Stereo Drum Machine
Inputs On Ch. 4
DVD/CD Player
Midi Sound Module
7.2 Church, School Or Meeting Room Sound System:
Here the DLM-821 is used to mix sources typically found in a church, classroom, or meeting room. The
channel 2-4 inputs are used for microphones for live vocal or instrumental pickup. Channel 1 is fed by an alarm signal
which will have priority and fully attenuate all other inputs if it is receiving an input signal. Channels 1 through 4 will
have their Stereo/Mono switch pushed in. The remaining INPUT channels are used for audio outputs from video/DVD
players, cassette deck, CD player, computer sound card, etc. One input channel is reserved as a spare. The power
amplifier (or any additional equalizer or electronic crossover which may be used) is fed from the MAIN OUTPUT
connectors. The Mono output is connected into the wall mic jack to feed the mix into the building's main PA system.
Left and Right
Here the Mono Output selector
Mono Output to
Speakers
Wall Mic Input
switch should be pushed in
for Secondary PA
Microphone
for a mic-level signal.
(Set Mono Output
to Mic level)
Stereo
Power Amplifier
Inputs
On Ch. 2 - 4
(Mono Switch In)
Alarm or
Priority Override
Audio Source
(Mono Switched In)
Laptop Audio
DVD/CD Player
Videotape Audio
7
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
7.3 Restaurant/Sports Bar System:
In this application, a variety of line level audio signals (tape, CD, satellite background music and TV) are fed
into line inputs five through eight. Talent mics are fed into inputs three and four. A host paging mic is fed into input
2 which will duck (attenuate) three through eight. An emergency paging mic is fed into input one and channel one
priority is internally selected. An emergency page signal will then fully attenuate all other inputs. Inputs one through
four should all have their Stereo/Mono switches pushed in. The Mono output is fed into an existing mic mixer/PA
amplifier. The Mono output Mic/Line switch should be pushed in to give a mic-level output to this existing mic mixer.
Stereo Speakers
Talent Mics
On Ch. 2 - 4
(Mono Switch In)
Stereo
Power Amplifier
Host Mic
(Ducking)
Emergency
Page
(Priority
Ducking)
Satellite TV Audio
Outdoor
Loudspeaker
Output
Tape
DVD/CD Player
Satellite Background Music
8. TROUBLESHOOTING TIPS
8.1 No Sound
Check the AC power. Is the power switch on and illuminated? Check the level meters. If they are operating,
the problem between the mixer and the later components in the system. If not, check to see you really have an input
signal and that it is on the desired channel. Check that you have the master gain controls at the desired operating level.
8.2 Distorted Sound
Something is being overdriven in the signal path. If the clip indicators are active, reduce the channel level controls. If the clip indicators are still active, reduce the input signal level. If the level meters are constantly in the red, reduce
the Master gain and increase the gain of components following the mixer. There are many gain adjustments in the mixer
itself and probably several others in other system components which makes it possible to overdrive an input section and
then incorrectly try to reduce the gain of the output section. The best way to approach setting gains is to establish the
operating level of input stages first by setting their gain as high as possible but leaving about 20dB of headroom for loud
peaks, then move on to set the master gain to produce a good meter reading. Proceed to set the gain of equalizers, limiters,
crossovers, and amplifiers following the mixer in the same manner, always working toward the later stages of the system.
8.3 Excessive Noise
If the noise is in the form of hiss, the problem is usually due to an input stage set up for low gain and then
compensating by increasing the master gain. Turn up the channel level controls and reduce the master gain.
8.4 Excessive hum
This is usually caused by "ground loops" in the system wiring. A complex sound system with many sources
separated by significant distance and using several power outlets has many opportunities for this problem to occur. If
possible, feed everything in the system from one power source with a common ground.
If you need help, get in touch with your Ashly dealer or call an Ashly technical service representative at
1-800-828-6308.
8
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
17.00
(432)
9. DIMENSIONS
0.10
(2.5)
1.15
(29)
6.00
(152)
19.00 (483)
1.25
(32)
1.75
(44)
18.375 (467)
!"#
$
%&
'+
10. SPECIFICATIONS
DISTORTION
THD at +20 dBu, 20Hz-20KHz . . . . . . . . . . . . . <0.05%
CROSSTALK
adjacent inputs or input to output at 1KHz . . . . <-80dB
adjacent inputs or input to output at 20KHz . . <-60dB
VU METERS
Two 5-segment LED meters. . . . . . . . . . . . . 0VU=+4dBu
HUM & NOISE (20Hz-20KHz)
residual output noise, all levels at minimum <-100dBu
MASTER OUT, MASTER LEVEL and one
INPUT LEVEL at nominal (unity gain) . . . . . <-83dBu
PEAK INDICATORS
activated when internal signal is 3dB below clipping
FREQUENCY RESPONSE
20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.2dB
PHANTOM POWER
Phantom power voltage . . . . . . . . . . . . . . . . . . . . . . +18V
SIGNAL LEVELS
Maximum input level . . . . . . . . . . . . . . . . . . . . . . +23dBu
Maximum output level . . . . . . . . . . . . . . . . . . . . . +23dBu
SHIPPING WEIGHT
10 lb (4.5kg)
VOLTAGE GAIN (dB±1)
INPUTS
MASTER OUTPUTS (levels at nominal) . . . . . . . . 0dB
INPUT to MASTER OUTPUT (levels at max) . . . 25dB
Ch.1 - 4 INPUT in MIC position to
MASTER OUTPUTS . . . . . . . . . . . . . . . . . . . . . . . . 56dB
DUCKER
Ch. 1-2 ducking threshold (mic) . . . . . . . . . . . . . -60dBu
Ch. 1-2 ducking threshold (line) . . . . . . . . . . . . . -30dBu
Ch. 3-8 default ducking level . . . . . . . . . . . . . . . . . -20dB
Ch. 3-8 optional ducking level . . . . . . . . . . . . . . . . -90dB
NET WEIGHT
7.2 lb (3.3kg)
POWER REQUIREMENTS
98 VAC - 125 VAC, 50-60 Hz,
15 watts (240 VAC available)
*unless otherwise stated, specification conditions are: 150
ohm source, all levels set at nominal, outputs into 2.7k
ohm or greater.
9
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
11. WARRANTY INFORMATION
Thank you for your expression of confidence in
Ashly products. The unit you have just purchased is protected by a five-year warranty. To establish the warranty,
be sure to fill out and mail the warranty card attached to
your product. Fill out the information below for your
records.
Model Number _________________________________
Serial Number __________________________________
Dealer
_______________________________________
Date of Purchase ________________________________
Dealer’s Address ________________________________
_______________________________________
_______________________________________
Dealer’s Phone _________________________________
Salesperson ____________________________________
10
A
B
C
D
1
VCA-DC
Revision Sheet
10s8210RV.sch
Meter Cards and Indicators
10s8210-5.Sch
RMeter
RPeakBus
LMeter
LPeakBus
CH 7 & 8 + Power Supply
10S8210-4.sch
RPeakBus
LPeakBus
RBus
LBus
Channels 3-6
10S8210-3.sch
47K
R33
J14
J2
3
2
1
33k
.1U
10P
-18 C42
33K
C22
.1U +18
2
2043
U1A
LPeak
-18
1
33K
R55
4560
U10A
D3
1N4148
LPeak
1
2
3
+18
VR2C
2k
R40
3
2
10k
R45
B20K
0
R64
R66
None
1
VR2D
2k
U12
3
2
3
+18
8
-18
3
R18
4.7K
.1U
C21
- 2180LC
+
.1U
4560
D14
1N4148
5.6k
R25
LBus
J8
5
6
R27
C15
15k
none
4560
U4B
4
J15
3
2
1
5.6k
R22
5
6
15k
C16
47U
D11
1N4148
LPeak
7
100k
R29
100k
R30
LMeter
RMeter
4
RPeak
2043
U1B
33K
0
10P
R63
D1
1N4148
7
R47
4560
U10B
33K
C9
7
6
5
R65
None
1
Right Ducking VCA
4560
U3B
C5
1.5U
D13
1N4148
RPeak
7
C18
47U
C6
1.5U
R19
Enable
5
6
R26
C14 none
(+0.4dB At Center)
VR2A
B20K
5.6k
R24
HDRM 1X3
Pan
RDuckBus
D12
1N4148
5.6k
R23
LPeak
1
VR2B
B20K
RPeak
1
22k
27p
4560
U3A
-18
R31
C28
+18
U4A
-18
22k
C29 27p
R32
+18 C26
R39
Master Level
(+3dB Mid, +18dB Max)
10k
R46
B20K
Left Ducking VCA
+18
C17
D15 47U
1N4148
LSum
RPeak
1
C19
47U
D16
1N4148
RSum
7
33k
2043
U7A
-18
R51
C12
10pf
2043
U7B
R52
C13
10pf
R34
3
2
5
6
C40
3
2
Enable
LBus
RBus
LDuckBus
HDRM 1X3
C23
.1U
-18
+18
R35
2.7K
C36
.1U
C35
.1U
4
8
E
8
4
RPeakBus
LPeakBus
RBus
LBus
6
4
8
4
8
2
4
4
8
5
12
10
68k
9
7
11
SW2D
VR1B
C100K
VR1A
C100K
8
U11
8
.1U
C37
-18
5
R3
4.7K
.1U
C41
- 2180LC
+
+18
LSum
RSum
Left Output Mute
(Shown Out)
R8
68k
R10
SW2C
R37
R38
100
R16
100
R17
RBus
Right Output Mute
(Shown Out)
7
5
22k
22k
4.7k
R11
4.7k
R12
5
6
3
2
-18
3
68k
-18
15k
4560
U6A
+18
7
68
R5
68
R6
1
6
47U
C24
Left Output
2043
U5B
R28
2
1
C10 10pf
R7
+18
2043
U5A
6
Right Output
68k
C11
R9
10pf
4
8
1
6
3
2
3
2
4
8
Channels 1-2
10S8210-2.sch
4
7
5
12. DLM-821 SCHEMATIC DIAGRAMS
1k
R4
1
7
6
47U
C25
J5
A->B @ 157%
10k
R50
100
R20
5
2
APPROVED:
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EUROBLOCK 3
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847 Holt Road
Webster, NY 14580-9103
R21
100
3
2
1
J4
Mono Output
8
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Drawn By
Dwg #
8
10S8210
22-Jan-2004
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Print Date 11:47:56 Rev.
Phone: (716) 872-0010 Fax: (716) 872-0739
R2
100
(Shown Out)
6
3
4 SW1A
1
(Line = Out)
Mic/Line
EUROBLOCK 6
R14
100
D18
1N4148
LPeak RPeak
D17
1N4148
of
10s8210-1.Sch
Sheet #
68p
4560
U6B
10k
R49
C32
R15
100
6
5
4
3
2
1
DLM-821 (Outputs and Duckers)
B
Size
5
6
SlimJack
Mono Level
4.7k
R13
VR1C
B10k
J9
Headphone Output
7
A
B
C
D
E
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
11
A
B
C
D
E
1
J101
6
5
4
3
2
1
CH1 Det
EUROBLOCK 6
Channel 1
Right/Mono/Mic
SW DPDT
SW104A
2
SW DPDT
SW104B
5
Left
1
3
4
6
47U
47U
C27
(-60 dBu Mic)
5
6
7
1.15k
R108
C106
3
2
+18
VREF
+18
2043
U101A
D4
1N4148
27p
-18
47U
6
5
1N4148
R118
100K
RPeak
8
12
In
Pan
1
NJM2903
U13A
7
3
1K
R62
/ATTN
Q5
2N4125
J12
LBus
RBus
-18
J16
Ducking Level
Q2
2N4123
5mA Typ.
Q1
2N4125
+18
-90dB
-20dB
R75
100K
4
J201
6
5
4
3
2
1
EUROBLOCK 6
Q7
2N4123
D6
1N746A
4
1
5
2
SW DPDT
6 SW3A
3
1
3
4
6
VCA-DC
5
Stereo = Out
Left
SW DPDT
SW204A
2
SW DPDT
SW204B
5
47U
C201
R202
3.3K
6
R211
10.0k
R210
10.0k
R209
10.0k
Mic/Line
In-Mic
5
4
R204
1.15k
R205
1.15k
R203
1.15k
SW202B
47U
C202
+18SW1
Phantom Pwr
5
Stereo/Mono
R201
3.3K
Channel 2
Right/Mono/Mic
Ducker Enable
J13
+18
C31
47U
4
1N5818
D22
CH2 Mute
C20
.1U
D8
R81
1N4148 18K
10M
R77
470K
R116
5.6k
Q6
2N4125
11
R76
&+ 3ULRULW\ (QDEOHG
J6
R72
10K
+18
(0 dBu Threshold)
2
3
+18
33K
R36
5.6k
VR101A
B20k
R114
6 In SW101B
5
4
10
SW101D
/ATTN
-18
+18
CH1 Det
C108
.1U
C107
.1U
Channel 1 Mute
In = Channel On
TLE2064
U2C
390K
R119
None
C1
Ducker Detector
Level
5.6k
9
10
VR101B
B20k
VR101C
B20k R115
Level
5.6k
VR101D
B20k R113
R117
100K
NJM2903
U13B
3
D103
SW102D
R61
560
VREF
D104
1N4148
R1
C30 1M
.1U
18K
R74
C109
47U
7
C110
LPeak
1
2043
U101B
27p
27p
C103
5
27p
39.2k
C104
11
In-Mic
Mic/Line
10
12
R107
6
10.0k
R112
R106
C105
TLE2064
U2B
27P
C8
33K
R73
R111
10.0k
R110
10.0k
R109
10.0k
2
9
Mic/Line
In-Mic
8
7
R104
1.15k
R105
1.15k
R103
1.15k
+18
SW102C
47U
(-30 dBu Line)
1K
R59
Stereo = Out
1
4
3
6
C102
SW DPDT
R102
3.3K
C101
2
5
Stereo/Mono
R101
3.3K
+18SW1
SW103A
39.2k
4
8
1.15k
R208
R206
27p
C205
3
2
+18
C209
47U
7
D204
1N4148
47U
C210
LPeak
1
2043
U201B
27p
2043
U201A
10.0k
-18
R212
C206
27p
C203
5
6
27p
39.2k
C204
R207
11
In-Mic
Mic/Line
10
12
1N4148
D203
6
R218
100K
RPeak
5.6k
Level
14
J1
2
of
10S8210-2.sch
Sheet #
In
11
6
1K
R216
LBus
CH2 Mute
A->B @ 157%
J110
3
APPROVED:
7
1
VREF
5
6
2
3
+18
1
7
/ATTN
1
2
3
4
5
6
10
11
8
7
12
9
4PDT Switch
CW
B
D
$VKO\ $XGLR ,QF
A
C
A
B
C
D
Four-Ganged Pot
NJM2903
U17B
NJM2903
U17A
-18
+18
C
847 Holt Road
Webster, NY 14580-9103
C34
.1U
1N4148
D7
C208
.1U
C207
.1U
8
Dwg #
James B Franks
Drawn By
8
10s8210
22-Jan-2004
D
Print Date 11:44:12 Rev.
Phone: (716) 872-0010 Fax: (716) 872-0739
R80
1M
TLE2064
U2A
-18
RBus
3
2
CH2 Mute
47U
C43
Q4 5.6k
J110
Q3
3
5.6k
R214
R60
+18 27P
C7
33K
R78
DLM-821 (Channels 1-2)
B
Size
12
10
VR201A
B20k
6 In SW201B
5
4
Pan
7
CH2 Detect Enable
J7
Channel 2 Mute
In = Channel On
TLE2064
U2D
390K
R219
None
C2
SW201D
12
13
VR201B
B20k
VR201C
B20k R215
Level
5.6k
VR201D
B20k R213
R217
100K
SW202D
6
1
2
3
2
8
4
4
11
Phantom Pwr
3
2
1
1
2
3
39.2k
4
8
1
2
1
2
8
12
4
1
A
B
C
D
E
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
A
B
C
D
E
6
5
4
3
2
1
6
5
4
3
2
1
1
EUROBLOCK 6
J501
Channel 5
EUROBLOCK 6
J301
Channel 3
Right/Mono/Mic
1
3
4
6
SW DPDT
SW304A
2
SW DPDT
SW304B
5
47U
Left
Right
Stereo = Out
1
4
3
6
R303
1.15K
6
4
R511
10.0k
R510
10.0k
R509
10.0k
2
R504
10.0k
R503
10.0k
R311
10.0k
R310
10.0k
R309
10.0k
Mic/Line
In-Mic
5
SW302B
R304
47U 1.15K R305
1.15K
C302
SW DPDT
R302
3.3K
C301
Left
Stereo/Mono
R301
3.3K
2
5
1.15k
R308
Mic/Line
C306
C506
27p
4560
U501B
C505
5
6
10.0k
-18
+18
1
D504
1N4148
47U
C510
LPeak
7
27p
4560
U501A
27p
C503
27p
3
2
D304
1N4148
47U
10.0k
C504
1
11
C310
LPeak
7
R507
2043
U301B
+18
2043
U301A
27p
27p
C303
3
-18
27p
RPeak
VR301B
B20k
VR501B
B20k
5.6k
Level
5.6k
3
12
In
Pan
4
6 In
10
SW501D
VR501C
B20k
R515
Level
In
11
5.6k
R316
VR301A
B20k
5.6k
11
5.6k
R516
VR501A
B20k
R514
5
SW501B
Channel 5 Mute
In = Channel On
12
10
Pan
5.6k
6 In SW301B
5
4
LDuckBus
RDuckBus
LDuckBus
6
5
4
3
2
1
4
EUROBLOCK 6
J601
Channel 6
EUROBLOCK 6
RDuckBus
J401
R314
-18
1
3
4
6
SW DPDT
SW404A
2
SW DPDT
SW404B
5
47U
R402
3.3K
C401
Left
Right
Stereo = Out
Left
Stereo/Mono
R401
3.3K
R403
1.15K
5
6
4
5
R611
10.0k
R610
10.0k
R609
10.0k
R604
10.0k
R603
10.0k
R411
10.0k
R410
10.0k
R409
10.0k
C406
5
6
27p
3
2
-18
R607
4560
D604
1N4148
47U
C610
4560
LPeak
7
+18
27p
10.0k
10.0k
1
D404
1N4148
47U
27p
U601A
1
11
C410
LPeak
7
C604
2043
C603
27p
U601B
C605
5
6
R612
C606
27p
U401B
+18
2043
U401A
27p
27p
C403
3
-18
27p
In-Mic
39.2K
C404
10
12
R407
2
10.0k
R412
C405
R606
10.0k
Mic/Line
In-Mic
5
SW402B
1.15k
R408
Mic/Line
R404
47U 1.15K R405
1.15K
C402
Channel 4
Phantom Pwr
Right/Mono/Mic
+18SW2
4
6
5
4
3
2
1
C308
.1U
C307
.1U
+18
Channel 3 Mute
In = Channel On
SW301D
RPeak
5.6k
VR501D
B20k
R513
C509
47U
1N4148
D503
Level
VR301C
B20k
R315
Level
5.6k
VR301D
B20k
R313
C309
47U
1N4148
D303
SW302D
3
R406
In-Mic
39.2K
C304
10
12
R307
2
10.0k
R512
R506
10.0k
27p
C305
5
6
R312
R306
+18SW2
2
39.2K
SW303A
+18
39.2K
Phantom Pwr
4
8
4
8
4
8
4
8
1
RPeak
VR601B
B20k
5.6k
Level
5.6k
6
12
10
In
Pan
-18
+18
5.6k
11
5.6k
R416
VR401A
B20k
R414
6 In SW401B
5
4
12
10
In
Pan
11
of
10S8210-3.sch
3
LDuckBus
6
A
C
A
B
C
D
1
2
3
7
8
9
APPROVED:
7
$VKO\ $XGLR ,QF
C
847 Holt Road
Webster, NY 14580-9103
B
D
8
Dwg #
James B Franks
Drawn By
8
10s8210
22-Jan-2004
D
Print Date 11:47:28 Rev.
Phone: (716) 872-0010 Fax: (716) 872-0739
4
5
6
10
11
12
4PDT Switch
CW
Four-Ganged Pot
A->B @ 157%
7
DLM-821 (Channels 5-8)
B
Size
5.6k
R616
RDuckBus
LDuckBus
RDuckBus
Sheet #
5.6k
VR601A
B20k
R614
6 In SW601B
5
4
Channel 6 Mute
In = Channel On
SW601D
VR601C
B20k
R615
Level
C408
.1U
C407
.1U
Channel 4 Mute
In = Channel On
SW401D
RPeak
5.6k
R415
VR401B
B20k
5.6k
VR601D
B20k
R613
C609
47U
1N4148
D603
Level
VR401C
B20k
Level
VR401D
B20k
R413
C409
47U
1N4148
D403
SW402D
6
A
B
C
D
E
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
13
A
B
C
D
1
6
5
4
3
2
1
L
G
N
AC-INLET
J3
EUROBLOCK 6
J701
H2
AC-GND
ACN
AC
H1
F1
3AG ½ AMP AGC
Left
Right
2
H3
out
Power
SW5
R711
10.0k
R710
10.0k
R709
10.0k
R704
10.0k
R703
10.0k
H4
C706
out
H5
120 240
SW6
1
T1
VR701B
B20k
5.6k
8
10
11
Level
3
R79
1.5K
C33
.1U
In
1N4004
D10
1N4004
D9
12
10
Pan
5.6k
11
1N4004
D20
1N4004
D19
5.6k
R716
VR701A
B20k
R714
6 In SW701B
5
4
Channel 7 Mute
In = Channel On
SW701D
5.6k
VR701C
B20k
R715
Level
H6
RPeak
VR701D
B20k
R713
C709
47U
1N4148
D703
3
P85D07308
5
3
4
2
D704
1N4148
47U
C710
LPeak
7
4560
120/240 Select
AC-SW
27p
4560
U701B
C705
5
6
27p
27p
10.0k
U701A
C703 +18
27p
10.0k
R712
R706
10.0k
3
2
-18
R707
C704
4
8
Channel 7
2
4
LDuckBus
RDuckBus
4
6
5
4
3
2
1
In
1000U
2
1N4004
Out
-18
C4
1.5U
7918
U15
+18
C3
1.5U
3
3
Left
Right
U14
7818
Out
D35 1N4004
D36
In
C39 HS1
C38
1000U
1
HS2
EUROBLOCK 6
J801
Channel 8
2
1
5
D24
1N4004
GND
D21
1N4004
5
R811
10.0k
R810
10.0k
R809
10.0k
R804
10.0k
R803
10.0k
C806
27p
1
D804
1N4148
47U
C810
4560
LPeak
7
27p
4560
U801B
C805
5
6
10.0k
27p
U801A
27p +18
C803
10.0k
R812
R806
10.0k
3
2
-18
R807
C804
4
14
8
E
1
D803
RPeak
VR801B
B20k
5.6k
6
Level
5.6k
In
4
of
10s8210-4.Sch
Sheet #
11
5.6k
R816
VR801A
B20k
5.6k
6
A->B @ 157%
LDuckBus
RDuckBus
7
1
2
3
7
8
9
$VKO\ $XGLR ,QF
B
D
C
847 Holt Road
Webster, NY 14580-9103
4
5
6
10
11
12
4PDT Switch
CW
James B Franks
Drawn By
22-Jan-2004
APPROVED:
7
8
D
Print Date 11:45:37 Rev.
Phone: (716) 872-0010 Fax: (716) 872-0739
A
C
A
B
C
D
Four-Ganged Pot
8
DLM-821 (CH 7 & 8 + Power Supply)
Dwg #
10S8210
B
Size
12
10
Pan
R814
6 In SW801B
5
4
Channel 8 Mute
In = Channel On
SW801D
VR801C
B20k
R815
Level
VR801D
B20k
R813
C809
47U
1N4148
6
A
B
C
D
E
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
A
B
C
D
E
12
11
10
6
5
4
9
8
7
3
2
1
4PDT Switch
BRACKET 4-40
B
D
+18 -18
3.3K
R905
1
-18
2
Y
D202
1
3
2
G
D201
1
3
SW201A
Ch. 2
Mute
2
3
2
3
6
5
6
5
2
+18
-18
+18
-18
G
D301
1
3
1
1
7
7
2
Y
3
D302
SW302A
Ch. 3
Mic/Line
4560
U901A
4560
U903A
4560
U901B
4560
U903B
-18
1
7
4560
U902A
SW301A
Ch. 3
Mute
R913
220
R914
100
R915
560
R916
1k
R917
2k
2
3
+18
U902B
4560
R911
4.7K
1
2
1
3
+18 -18
+18
2k
R44
4
1
2
3
4
5
4
2
G
D401
SW401A
Ch. 4
Mute
1
3
H10
BRACKET 4-40
J951
2
G
D501
SW501A
Ch. 5
Mute
+18 -18
1
3
Ch. 6
Mute
2
G
D601
SW601A
From 10P3801 Motherboard
Right Meter Card
All Switches Shown In Out Position
Y
D402
SW402A
Ch. 4
Mic/Line
G -20VU
D901
R910
4.7K
G -12VU
D902
R909
4.7K
G -6VU
D903
R908
4.7K
3
+6VU
Y 0VU
D904
R907
4.7K
Y
D905
D909
D906 1N4148
R
Clip
2k
G
2
SW202A
Ch. 2
Mic/Line
220
R912
33k
R918
6
4.7K
R901
R41
Y
D101
C901
.01U
-18
5
300k
10k
R904
12k
R902
R903
2k
D102
1
3
3
2
SW102A
1
Ch. 1
Mute
SW101A
Ch. 1
Mic/Line
R906
10M
+18
3
R42
2
Ch. 1-8 Mute Switch Indicators/
Ch. 1-4 Mic-Line Switch Indicators
A
C
1
2
3
4
5
H9
J901
From 10P3801 Motherboard
Left Meter Card
2
8
4
8
4
8
4
1
3
3.3K
R955
Ch. 7
Mute
2
G
D701
1
3
5
SW701A
R956
10m
5
Ch. 8
Mute
2
G
D801
SW801A
1
3
2
R
D2
SW2A
1
3
R963
220
R964
100
R965
560
R966
1k
R967
2k
R954
12k
Output
Mute
220
R962
33k
R968
10k
R953
C951
.01U
-18
+18
G
D5
+18
4560
U952B
+18
-18
+18
2k
R43
-18
4560
U951A
4560
U953A
4560
U951B
4560
U953B
-18
4560
U952A
Power
2
3
2
3
6
5
6
5
2
3
6
5
300k
R952
8
4
8
4
8
4
6
+18
1
1
7
7
1
7
6
+6VU
R961
4.7K
G -20VU
D951
R960
4.7K
G -12VU
D952
R959
4.7K
G -6VU
D953
R958
4.7K
D959
+18
5
10s8210-5.sch
Sheet #
of
6
3
2
5
6
-18
1
R919
APPROVED:
7
LPeak
+18
1
2
3
4
5
1
2
3
4
5
J11
J10
$VKO\ $XGLR ,QF
-18
+18
RPeak
8
Dwg #
8
10S8210
22-Jan-2004
D
Print Date 11:45:00 Rev.
Phone: (716) 872-0010 Fax: (716) 872-0739
C
847 Holt Road
Webster, NY 14580-9103
C952
1.5U
C902
1.5U
-18
James B Franks
Drawn By
1k
D957
1N4148
R969
1k
D907
1N4148
A->B @ 157%
4560
U16A
+18
7
1N4148
D958
68k
R970
4560
U16B
1N4148
D908
68k
R920
7
DLM-821 (Indicators and Meters)
B
Size
LMeter
RMeter
D956 1N4148
R
Clip
Y 0VU
D954
R957
4.7K
Y
D955
4.7K
R951
4
8
1
A
B
C
D
E
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
15
Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer
ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103
Phone: (585) 872-0010 Fax: (585) 872-0739
Toll Free (800) 828-6308
www.ashly.com
© 2004 by Ashly Audio Corporation. All rights reserved worldwide.
Printed in USA 3-04
DLM-00
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