Ashly VCM-88 User 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
VCM-88
VCM-88E
Eight Channel Matrixing Level Controllers
RD-8 Desktop Remote
RW-8 Wall Mount Remote
Operating Manual
ThrSig
0
-6
-12
-18
-23 +23
+18
+6
+12
dBu
0
-6
-12
-18
-23 +23
+18
+6
+12
dBu
0
-6
-12
-18
-23 +23
+18
+6
+12
dBu
0
-6
-12
-18
-23 +23
+18
+6
+12
dBu
0
-6
-12
-18
-23 +23
+18
+6
+12
dBu
0
-6
-12
-18
-23 +23
+18
+6
+12
dBu
ThrSig ThrSig ThrSig ThrSig ThrSig ThrSig ∞
∞
Gain (dB)
On
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
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Table Of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 AC Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 Security Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5 VCM-88, VCM-88E Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.1 Signal Present LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.2 Limiter Threshold Control and Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.3 Master Attenuation Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.4 Digital Remote Control Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.5 Digital Remote Control Disable Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.6 Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.7 Master Output and Channel Pass Through . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
5.8 DC Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
5.9 Remote Control Data Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.10 Device ID Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.11 RS-232 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.12 RS-232 Mode Switch (VCM-88E only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.13 Data Protocol Selector Switches (VCM-88E only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5.14 MIDI (VCM-88 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.15 Slave Data In/Out (VCM-88E only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 RD-8/RW-8 Remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1 Channel and Master On Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.2 Channel and Master Fader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.3 Remote Disable Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.4 Data Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7 Audio Connections and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.1 Balanced and Unbalanced Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.2 Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.3 Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8 Input and Output Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.1 Single Connector Insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.2 Single Channel Pass-Through . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.3 Input/Output Matrixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9 Data Connections and Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
9.1 Standard Remote Data Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.2 AMX and Legacy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.3 DC Control Voltage Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.4 RS-232 Control and Protea System Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
9.5 MIDI Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
WARNING:
THIS APPARATUS MUST BE EARTHED
The exclamation point within an eqilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance instructions in the literature
accompanying the device.
The lightning flash with arrowhead
symbol, within an equilateral triangle, is
intended to alert the user to the presence
of uninsulated "dangerous voltage" within
the product's enclosure that may be of
sufficient magnitude to constitute a risk
of electric shock to persons. TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT RE-
MOVE COVER. NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK,
DO NOT EXPOSE THIS APPlIANCE TO RAIN OR MOISTURE.
TO REDUCE THE RISK OF FIRE, REPLACE ONLY WITH
SAME TYPE FUSE. REFER REPLACEMENT TO QUALI-
FIED SERVICE PERSONNEL.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
10 Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
10.1 No Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
10.2 Very Little Output Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
10.3 Distorted Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
10.4 Excessive Hum or Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
11 Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
12 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
13 Dimensional Drawings and Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
14 Common Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
15 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
15.1 VCM-88 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
15.2 VCM-88E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
15.3 RD-8 and RW-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
4
1. Introduction
One of the many useful circuits to be developed
for audio use is the VCA, or voltage controlled amplifier.
A VCA circuit allows for accurate, low distortion level con-
trol without signal degradations encountered when using
mechanical controls or long signal paths. VCA circuits can
be found in compressor/limiter/expanders, noise gates, noise
reduction systems, automatic mixers, VCA-Bus consoles,
and other places where remote control or fast automatic
system response is required. Designers at Ashly felt there
was still a need for high quality VCA control which could
be incorporated into professional sound systems without
unnecessarily high cost or complication.
The Ashly VCM-88 and the similar VCM-88E
(euro-block connector model) provide eight fully-indepen-
dent VCA channels in a single unit capable of limiting, re-
mote level control, and mixing. When connected to the
Ashly RD-8 (desktop) or RW-8 (wall-mount) remote con-
troller, direct DC control, or Ashly's Protea System Soft-
ware, the VCM-88(E) controls individual channel and mas-
ter levels with a range of -75dB to +20dB. Each VCA chan-
nel has separate input and output jacks for patching into
line-level signal paths, and can be reconfigured to use single
connector insertion for patching into mixing consoles.
When using the VCM-88(E) as a mixer (using the master
output), each channel’s input can be configured to “pass-
through” to its output for daisy chaining multiple units to-
gether.
The Ashly VCM-88E maintains the features of the
VCM-88 while replacing 1/4" jacks with Euroblock con-
nectors. It also adds bi-directional data communications,
non-volatile memory of level settings, and uses all recessed
face panel controls specifically for fixed installations.
The RD-8 remote controller is a compact slidefader
remote level controller which can be desk-top situated or
rack-mounted into two rack spaces (3.5 inches) using the
RD8-RM optional mounting bracket. This remote control-
ler is also available as the RW-8 for wallmounting into a
standard 4-gang electrical box. The RD-8 controls the au-
dio levels of the VCM-88(E) over a standard XLR snake
cable or shielded twisted pair. As it is powered entirely by
the VCM-88(E), no batteries or remote power supply are
necessary for either RD-8 or RW-8. The RD-8 can com-
municate to the VCM-88(E) over a 24 gauge snake cable in
excess of 1/4 mile (400m). The RD-8 also pulse-shapes
the digital waveform to eliminate digital crosstalk noise into
adjacent audio channels.
2. Unpacking
As a part of our system of quality control, every
Ashly product is carefully inspected before leaving the fac-
tory 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 dam-
age 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.
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
A standard IEC-320 AC inlet is provided on the
rear panel to accept the detachable power cord shipped with
the unit. Units distributed within the United States are
preselected for 120VAC, 60Hz and should be plugged into
a standard NEMA 5-15 3-wire grounded AC receptacle.
Most units distributed outside the US are preselected and
labeled for 240VAC, 50-60Hz and are shipped with the
appropriate power cord.
The VCM-88(E) will perform normally from 100
to 125 volts AC. An internal line fuse is used. In the event
of fuse failure, refer to a qualified service technician for
servicing. Maximum power consumption of the VCM-
88(E) is 18 watts.
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 avail-
able in both single and double rack space sizes. Installa-
tion is simple and does not require removal of the equip-
ment from your rack. See your Ashly dealer for details.
5
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
5. VCM-88, VCM-88E Features
5.1 Signal Present LED
Each channel has a green LED to indicate input
signal present (app. -20dBu). Since the LED is referenc-
ing the audio signal prior to the VCA circuit, the LED will
continue flashing even if the channel level is turned down.
5.2 Limiter Threshold Control and Indicator
The recessed Limiter Threshold trimpot adjusts the
signal threshold above which the limiter will become ac-
tive. The units of this threshold dial are dBu where 0dBu =
0.775Vrms. The limiter is a peak-detecting true VCA type
limiter with very low distortion. The input to output ratio
of the limiter is approximately 10 to 1 with a relatively fast
attack and moderate release time behavior. The adjacent
yellow threshold LED indicates when the limiter circuit has
been activated by an audio signal above the threshold level.
To disable the limiter on any given channel, simply rotate
its threshold adjustment fully clockwise to +23dBu, which
is the maximum input signal of the unit.
5.3 Master Attenuation Control
This control (fully recessed on the VCM-88(E) at-
tenuates all eight channels uniformly, and was designed as
a simple means of turning down all eight audio channels at
the VCM-88(E) location in the event of feedback or other
sound system problems. Normally this control should be
set fully clockwise at 0dB attenuation.
5.4 Digital Remote Control Status Indicator
This green LED indicates when the VCM-88(E) is
receiving data from the RD-8, RW-8, or computer control.
In the event of remote control data interruption, the VCM-
88(E) will lock all settings just before the data reception
stopped and continue to operate as if there were no changes
happening. Reconnecting the remote data signal with the
VCM-88(E) still operating will instantly change the chan-
nel level settings to wherever the controller is currently set.
Note: If the VCM-88 AC power is switched on with no data
reception, all eight channels and the master level will de-
fault to unity gain (0dB). The VCM-88E will remember the
last level settings when the AC power is switched off and
will restore these settings on power-up.
5.5 Digital Remote Control Disable Switch
This switch disables the RD-8 remote controller
and returns all eight channels to unity gain. On the VCM-
88E, this switch is Protea Software selectable to provide
either unity gain or the last level settings before the remote
is disabled. The adjacent red LED indicates when this
switch is depressed. The nearby green Remote Active in-
dicator will go off when the remote is disabled because the
RD-8 does not send any data when it is disabled. After
releasing the remote disable switch, all channels return to
their respective levels set by the RD-8 remote controller or
software control.
5.6 Power Switch
On the VCM-88, this front-panel push-button
switches the AC power to the unit. The switch is located
on the back panel of the VCM-88E. A green LED indi-
cates when the unit is powered on. If the green LED does
not light, check to see if the unit is plugged into a live out-
let, and that the removable AC cord is firmly plugged into
the VCM-88(E). If there is still no light, refer the unit to a
qualified service technician.
ThrSig ThrSig ThrSig Th rSig ThrSig ThrSig ThrSig ∞
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
6
5.7 Master Output and Channel Pass Through
The VCM-88(E) can be used as an eight-in/one-
out remote level control for personal monitor mixing using
the Master Output. Multiple VCM-88(E) units can be daisy
chained to produce several unique mixes from the same
program source. To simplify cabling for this application,
the VCM-88(E) has the ability to internally pass each
channel’s input signal directly to its output jack, disabling
that channel’s direct VCA output but eliminating the need
for special “Y” cables. The passed-through channel’s VCA
output is automatically summed to the 200 Ohm pseudo-
balanced Master Output along with other channels for fi-
nal output. The gain from any one input channel to Master
Output is -6dB so that a mix of several audio channels will
have approximately the same volume as one of the input
channels. See section 8.2 for channel pass-through details.
5.8 DC Control
A 15 pin female D-Sub connector on the back panel
(12-position Euroblock on the VCM-88E) is used for DC
control of the eight VCA channels and Master Attenuation,
providing a simple and cost-effective method for custom
control of the VCM-88(E). Most electronics hardware
stores will have the male connector complement. The ref-
erence DC voltage is also provided, thus requiring only the
male connector, wire, and a 10K ohm potentiometer for
each channel to control audio levels from any reasonable
distance. See section 9.3 for DC Control details.
5.9 Remote Control Data Input
This connector is used for remote control by the
Ashly RD-8 or RW-8, or other third party controllers. AMX
and Crestron are companies which manufacture touch-
screen computer interfaces for a variety of control applica-
tions, including the VCM-88(E). AMX and Crestron pro-
vide a hardware interface which uses the XLR Data In con-
nector on the VCM-88 and the Remote RD/RW-8 Euroblock
connector on the VCM-88E. See section 9.1 for AMX and
Crestron interface details.
5.10 Device ID Select
Each VCM-88(E) can be addressed to one of 16
devices, allowing for control of up to 128 channels (16 x 8)
from a single data line. The device ID on the VCM-88E is
selected in binary format from the Device ID DIP switch
on the rear panel. The device ID on the VCM-88 is inter-
nally selected with jumpers. See section 9.5 for Device ID
Select DIP switch settings or internal jumper locations.
5.11 RS-232 Input
RS-232 is a bi-directional serial communications
connection which allows computer devices to control other
hardware. Ashly Protea System Software (see section 9.4)
uses RS-232 to control the VCM-88(E), and other third party
sources may use RS-232 as well.
While both the VCM-88 and the VCM-88E have
dedicated RS-232 input jacks, only the VCM-88E RS-232
input is truly bidirectional. RS-232 data is read into the
memory of the VCM-88E and stored, then read back from
memory to get an actual snapshot of the current data set-
tings. This is especially useful to upload to Protea System
Software the current settings of a VCM-88E.
The VCM-88 data is unidirectional in receiving
data only, meaning there is no RS-232 data out from the
unit.
5.12 RS-232 Mode Switch (VCM-88E only)
The RS-232 mode switch is pushed in only when
the VCM-88E RS-232 Input is connected to a PC, and an-
other unit is connected to the Slave Data connector.
1210
10K CW
Pin 1-9
CAUTI ON
RISK O F ELECTR IC SHOC K
DO NOT OPEN
RS-232
VCM-88E
Made In USA
Risk of Electric
Shock. Do
Not Open
CAUTION
7
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
5.13 Data Protocol Selector (VCM-88E only)
These two DIP switches allow selection of four data
protocols. The Standard protocol is selected for use with
current Ashly, AMX, or Crestron controllers. The Protea
Software protocol is selected for use with Ashly's Protea
System Software. The MIDI protocol is used for control
by a MIDI device. The Legacy protocol is selected for con-
trol by a legacy Ashly or AMX device. On the VCM-88,
protocols are selected using internal jumpers. See fig. 9.2
for VCM-88 data protocol details.
5.14 MIDI (VCM-88 only)
MIDI In and MIDI Thru jacks allow complete
implementation of the VCM-88 in a MIDI network. An in-
ternal jumper selection is required to operate under MIDI
control. For specific details regarding internal selection,
as well as continuous controller numbers and values, see
section 9.5.
5.15 Slave Data In/Out (VCM-88E only)
Multiple VCM-88E units can be placed in the same
control loop using the Slave Data In/Out euroblock con-
nectors. Control data originates from another unit under
RS-232 or MIDI control. (See fig. 9.5)
6. RD-8/RW-8 Remote
The RD-8 and RW-8 are functionally the same. The
difference is the RW-8 is designed to mount as a wall plate
using a standard 4-gang electrical box. Both the VCM-88
and VCM-88E respond identically to the RD-8 or RW-8.
6.1 Channel and Master On Switch
These push-buttons switch the respective VCM-
88(E) channel on or off. When switched on, the channel
gain is controlled by the setting of the respective channel
fader on the RD-8. When switched off, the respective VCM-
88(E) channel is muted to approximately -75dB by the in-
ternal VCA circuit. The adjacent green LED is lit when the
channel is switched on.
6.2 Channel and Master Fader
The slide faders on the RD-8 and RW-8 control
the gain (volume) in dB of their respective channel in the
VCM-88(E). The Master fader controls the gain of all eight
channels together. That is to say, the master fader can raise
or lower all eight channels uniformly without affecting the
“mix” just like the master fader on a mixing console.
6.3 Remote Disable Indicator
This red LED illuminates when the RD-8 has been
disabled by the Remote Disable Switch on the VCM-88(E).
When the Remote Disable LED goes off, the RD-8 remote
controller will resume normal operation. Avoid dramati-
cally changing the level settings of the controller when dis-
abling it or disconnecting the data line, as the VCM-88(E)
master will immediately respond to any changes made to
the controller upon re-connecting.
6.4 Data Connection
The male XLR jacks on the side and bottom of the
RD-8 are wired in parallel so that an XLR plug may be
inserted into the side for desktop operation or into the bot-
tom for rack-mount operation. Pin 2 is the data output, pin
3 is the positive DC voltage input, and pin 1 is ground.
This XLR data output may be “split” with an XLR Y-cable
to feed two VCM-88(E) units to give stereo 8-channel ca-
pability. Also, by installing factory customized firmware
into the device ROM, the RD-8 slide faders can be assigned
to any (or several) arbitrary VCM-88(E) channels. Contact
a factory technical service representative for details.
∞
Gain (dB)
6.4 6.3
6.1
6.2
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
8
7. Audio Connections and Cables
7.1 Balanced and Unbalanced Signals
Balanced signal connections are preferred in pro
audio applications because of their improved immunity to
induced hum and noise. A properly shielded and wired
balanced input stage on any product will by design reject
most unwanted noise picked up by the cable as well as mini-
mize ground loop problems. Therefore it is always advan-
tageous to use balanced connections when running signal
more than ten or fifteen feet, although particularly noisy
environments (high RFI, EMI, etc.) may require that even
short cabling be balanced. Ashly TRS (tip-ring-sleeve) bal-
anced connections use the tip as (+) and the ring as (-) sig-
nal, with sleeve used for ground. Ashly XLR connectors
use pin 2 (+) and pin 3 (-) with pin 1 ground.
Unbalanced connections are used mostly for short
distance, high level signals (0dBu nom). Most external EMI
noise pick-up will be masked under the noise floor of the
signal, assuming there is little or no gain following the un-
balanced signal. If a gain stage does follow a signal, or if
externally sourced noise persists, use balanced connectors.
The VCM-88 and the VCM-88E are factory con-
figured for separate input and output connectors. Used this
way, inputs and outputs can be wired balanced or unbal-
anced. An internally selected single connector insert is also
available (see section 8.1).
7.2 Input Connections
The VCM-88 uses balanced 1/4" input jacks (see
fig. 7.1), while the VCM-88E uses Euroblock connectors
(see fig. 7.2). Both unit's inputs are 20K ohm active bal-
anced and 10K ohm unbalanced. If the VCM-88E uses un-
balanced inputs, connect the input signal to (+) and con-
nect the (-) pin to ground. Note: If the single connector
insert mode is selected (see section 8.1), the In jack serves
as the TRS insert on the VCM-88 and the (+) and (-)
euroblock connections serve as the input and output respec-
tively on the VCM-88E.
7.3 Output Connections
The VCM-88(E) audio outputs are 200 ohm
pseudo-balanced (balanced impedance but signal drive on
tip or (+) only). For unbalanced euroblock outputs on the
VCM-88E, connect the signal wire to (+) and the shield to
ground (see fig. 7.3).
Note: If the single connector insert mode is selected
(see section 8.1), the output signal is taken from the ring or
(-) of the Input jack, while the Output jack is not used.
Tip (+)
Ring (-)
Sleeve (Gnd)
Stereo Phone Plug
used for balanced
Tip (+)
Sleeve (Gnd)
Mono Phone Plug
used for unbalanced
Fig 7.1
Fig 7.2
Fig 7.3
+-G
+-G
+-G
+G
Unbalanced
Output
Balanced
Output
Euroblock
Output
Connections
Euroblock
Input
Connections
+-G
+-G
+-G
+-G
Unbalanced
Input
Balanced
Input
9
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
tions. The jumper must be placed in the “1” position (see
drawing at top of page) for single jack in/out operation.
With the jumper set to “1”, the input is on the tip and the
output is on the ring of the In jack. The Out jack is not
used. This convention is compatible with most mixing con-
soles equipped with single TRS insert jacks, but check your
mixer specifications before assuming this to be true.
On the VCM-88E, the single connector insert ca-
pability can be selected by placing jumpers in both the "1"
position and the "P" position. The (+) input pin becomes
the input connection and the (-) input pin becomes the out-
put connection. The out jack is not used.
8.2 Single Channel Pass-Through
When Using Master Output for personal monitor
mixing or other application, it is possible to pass a channel’s
input directly to it’s output jack, eliminating the need for
extra “Y” cables when daisy-chaining several VCM-88(E)
units together. Place the internal jumper in the “T” posi-
tion to select individual channel pass-through. The VCA
circuit’s output signal is still summed to the Master Out-
put, but is removed from the channel output jack.
8.3 Input/Output Matrixing
Input Matrixing means that an input can be inter-
nally routed to one or more additional channel inputs, par-
ticularly useful in distributed zone applications. Each of
the matrixed VCA channels share a common input signal
but retain their distinct level controls via the RD-8, RW-8,
or other hardware or software controllers.
There are two steps required for input/output
matrixing. First, the internal jumper must be set to the “P”
position (see fig. 8.1) for each channel being patched into.
The actual input or output channel used to connect to the
input source remains in either the “2” position if separate
input and output jacks are used, or the “1” position if using
single jack TRS insertion.
The second step is to insert 22 gauge solid insu-
lated “bell wire” from the input or output Patch holes of
the source channel to the Patch socket of the channel being
patched into. Strip 1/4" of insulation from each end after
cutting to the appropriate length, and firmly press the bare
wire end straight into either side of the Patch hole, avoid-
ing any kinks along the strip length. Daisy chain the Patch
holes, one into the next, until all shared input requirements
are met. Those channels which have received the internal
patch input should all be set to the “P” position, and the
input jack on each of those channels cannot be used, since
each patched channel’s input is derived internally.
O
8. Input and Output Configuration Options:
8.1 Single Connector Insert
To use a mixing console’s single jack insert capa-
bilities with the VCM-88, an internal jumper must be se-
lected to properly configure the input and output connec-
Fig 8.1
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
10
9. Data Connections and Configurations
9.1 Standard Remote Data Control
To connect the RD-8 or RW-8 remote controller,
the VCM-88 uses a rear panel female XLR jack, while the
VCM-88E uses a three pin euroblock connector. The con-
troller data can be sent through one channel of a standard
audio snake without affecting adjacent audio channels.
Do not use an isolation transformer in the data line.
The Standard data protocol is compatible with cur-
rent RD-8 and RW-8 remote controllers, AMX (VCM-88
and VCM-88E drivers), and Crestron controllers. Both
AMX and Crestron provide hardware which interfaces with
the VCM-88(E) through the XLR or euroblock Data In con-
nector. To learn more about their integrated control sys-
tems, visit their websites at <www.amx.com> and
<www.crestron.com>.
The details of the Standard VCM-88(E) digital for-
mat are as follows: Pin 1 is ground, Pin 2 is used for the
data input signal to the VCM-88(E), and Pin 3 is used as a
+26VDC power supply signal for powering the RD-8 re-
mote controller. Do not use pin 3 with 3rd party hardware
such as AMX or Crestron.
A valid message consists of two bytes with no break
between byte1 and byte 2.
1 Byte = start bit + 8 data bits + stop bit (10 bits
total, no parity)
Baud rate: 9600 bps
Start bit: logical 0 (current on)
Stop bit: logical 1 (current off)
Byte 1: Channel ID Character:
hex 80 - hex FF = Channels 1 - 128
Byte 2: Channel Level Character:
hex 7F = full on = +20.25dB
hex 64 = unity gain = 0dB
hex 00 = off = -75dB
(step size = 0.75dB)
9.2 AMX and Legacy
Using older RD-8 and RW-8 remote controllers,
as well as retired AMX products using the VCX-88 driver,
requires the Legacy data protocol. To know whether Ashly
hardware controllers require the Legacy or Standard proto-
col, look at the first three numbers in the Serial Number
sticker affixed to the unit.
Product Legacy (old) Prefix Standard (new) Prefix
RD-8 708- **** 794-****
RW-8 709-**** 797-****
To set the data protocol on a VCM-
88 for Legacy controllers, set the internal
jumpers (J6) to Ashly/AMX. To set the
data protocol on a VCM-88E for Legacy
controllers, DIP switches on the back panel
must be set to the Legacy configuration.
9.3 DC Control Voltage Connection
Direct DC voltage control of internal VCA circuits
is available on the VCM-88(E). On the VCM-88, a D-Sub
15 pin female connector is used, while the VCM-88E uses
a 12 pin euroblock connector. DC control meets the re-
mote control objectives with minimal hardware require-
ments and allows for custom “low-tech” hardware inter-
faces. Two wires are used to supply positive and negative
DC voltage to ordinary 10K ohm linear-taper potentiom-
eters, and a wire is used to return the wiper of each control
to its respective channel (see pinout below). Telephone wire
with eleven conductors or more is a good choice for this
application, and since only DC voltage is used, control line
distance is not a major concern.
Pin 1 Channel 1 DC control input
Pin 2 Channel 2 DC control input
Pin 3 Channel 3 DC control input
Pin 4 Channel 4 DC control input
Pin 5 Channel 5 DC control input
Pin 6 Channel 6 DC control input
Pin 7 Channel 7 DC control input
Pin 8 Channel 8 DC control input
Pin 9 Master DC control input
Pin 10 +15VDC - Connect to pot CCW
Pin 11 (Ground for data input)
Pin 12 -4VDC - Connect to pot CW
Pin 13-15 Not Used
9.4 RS-232 Control and Protea System Software
Protea System Software is Ashly’s custom Win-
dows program for controlling the Protea family of digital
audio processors, as well as the VCM-88(E). Using the
software extends the capabilities of the VCM-88 by allow-
ing storage of channel and scene settings to disk. The pro-
gram interface has the look and feel of the RD-8 remote
control, and can control up to 16 devices for a total of 128
audio channels. (See fig. 9.3)
VCM-88
(AMX)
ASHLY (2,4)
CRESTRON (1,4)
RS-232 (2,3)
MIDI (1,3) 21
43
J6
Fig. 9.2
11
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
To use the VCM-88 with Protea Software, internal
data jumpers (see fig. 9.2) must be placed in the RS-232
position on the printed circuit board.
On the VCM-88E, the Standard protocol selection
is used for Ashly RD-8, RW-8, AMX, and Crestron. To
control the VCM-88E with Protea System Software, select
the Protea Software protocol on the back-panel DIP
switches.
The RS-232 Input connector to a VCM-88(E) is a
D-Sub 9 pin female, and connects to an unused Com port
on a PC. See fig. 9.4 for custom RS-232 wiring. Protea
System Software allows Com Port assignment (1-16) in its
setup menu. If the only available port on a PC is a USB
port, a USB to RS-232 converter can be purchased from
computer suppliers. Protea System Software is available
free of charge on the Ashly website <www.ashly.com>.
9.5 MIDI Implementation
Both the VCM-88 and the
VCM-88E can be fully imple-
mented in a MIDI system as a
slave unit, that is, able to receive
data without being able to gener-
ate new data. On the VCM-88, the
MIDI Thru jack is a buffered re-
flection of the MIDI input, and is
used to connect to other MIDI de-
vices in the network. On the VCM-
88E, use the Slave Data In and Out
to connect to a MIDI controller.
The quality and accuracy of MIDI
control is limited only by the qual-
ity of the MIDI Master device.
To use the VCM-88 in a
MIDI network, two circuit board
jumpers must be placed in the
MIDI position (see fig. 9.2) to se-
lect the MIDI communications
protocol. To use the VCM-88E in a MIDI network, set the
back panel Protocol DIP switch to the MIDI configuration.
Set the VCM-88 to the desired MIDI Channel
(VCM-88 device 1-16) using the Bank ID Select jumpers
found on the circuit board (see fig. 9.5). Device 1 equals
MIDI channel 1, device 2 equals MIDI channels 2, and so
on, up to device 16.
Set the VCM-88E to the desired MIDI Channel by
using the Device ID DIP switches on the back panel. The
VCM-88E Slave Data signals, which are located on a 6-pin
euroblock style connector, may be used to interface other
VCM-88E units for software or MIDI control. The Slave
Data jack may also be used to interface Ashly Protea prod-
ucts, via their MIDI In/Out jacks, (see pin compatibility
Fig. 9.4 Fig. 9.5
D-Sub 9 Pin Female
RS-232 Pin-Out
12345
9876
Pin # RS-232 DCE Name
1
2
3
4
5
6
7
8
9
Not Connected
Transmitted Data
Received Data
Data Terminal Ready (tied to pin 6 )
Ground
Data Set Ready (tied to pin 4)
Not Connected
Not Connected
Not Connected
0
VCM-88
Internal
Device ID
(MIDI Channel)
Jumper Select
1234
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
* PCB May Say
"Bank Select"
(default)
VCM-88E
Back Panel
Device ID
(MIDI Channel)
DIP Switch Select
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
(default)
Fig. 9.3
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
12
below). The Slave Data Out from the first unit is connected
to the Slave Data In on the next unit, and so on, with the
Slave Data Out from the last unit returning to the Slave
Data In on the first. A serial RS-232 cable is then connected
to the first unit, and the RS-232 switch is set to Multiple
RS-232 mode on this first unit only. (Note: the RS-232
switch must be set to standard mode on all other units.) All
units must be set to the same Protocol, such as Protea Soft-
ware, if that is the control method implemented.
The Slave Data signals are fully MIDI hardware
compliant, and standard MIDI controller messages may be
implemented when MIDI Protocol is selected. MIDI Con-
tinuous Controller #42-49 are used to control the level of
VCM-88(E) channels 1-8 respectively. Controller level
(0-127) yields a channel level of -75dB to +20.25dB, in
0.75dB steps, where 100 = 0dB. MIDI 5-pin DIN compat-
ibility is as follows:
Slave Data Pin MIDI signal 5-pin MIDI DIN
Slave In + MIDI In + pin #4
Slave In - MIDI In - pin #5
Slave In NC
(MIDI shield - float at input, per MIDI spec)
Slave Out + MIDI Out + pin #4
Slave Out - MIDI Out - pin #5
Slave Out G MIDI Shield pin #2
Note: whenever Ashly Protea System Software is
used the Protocol must be set to Protea Software on all units.
If problems occur, be sure to check that the proto-
col is selected to MIDI, that the VCM-88(E) has been se-
lected to the correct device (MIDI Channel), that the cor-
rect continuous controller number is being used for the
desired audio channel, and that the controller value is cor-
rect.
10. Troubleshooting Tips
10.1 No Output
Check AC power - is green power LED indicator
on? Check input/output connections - are they reversed?
Is the Master Attenuator control turned fully up? Are re-
mote controller channels switched on? Are the input/out-
put jacks configured correctly (one jack insert versus two
jacks) for the application?
10.2 Very Little Output Signal
Are the yellow Limiter Threshold indicators on
often? Rotate the recessed Threshold controls clockwise
to allow greater output signals to pass unlimited. Check
the Master Attenuator control - normally this control should
be fully clockwise at 0dB. Check the RD-8 remote con-
troller -the fader levels should normally be operated around
0dB.
10.3 Distorted Sound
The maximum input signal level is +23dBu =
10.95Vrms. Above this input level, input clipping distor-
tion will occur. Also, if the input signal level plus the gain
set by the remote controller goes above +23dBu, output
clipping distortion will result.
10.4 Excessive Hum or Noise
Hum and buzz noise is usually caused by a “ground
loop” between audio components. Try using balanced in-
put and output connections between the VCM-88(E) and
other components in the system. Also, try to power all com-
ponents in the system from a single AC branch circuit.
Noise can also be caused by a large amount of gain
applied to an insufficiently low input signal. The VCM-
88(E) is not designed to feed microphones directly into the
inputs without a mic preamp first. The VCM-88(E) is es-
sentially a line level unity-gain device, meaning it is de-
signed to be fed by a nominal 0dBu line level signal and its
output should typically be 0dBu in level. To ensure proper
gain structure in your sound system, press the remote dis-
able switch in and rotate the Master Attenuator control fully
clockwise so that all VCM-88(E) channels are at unity gain.
Adjust your signal source which precedes the VCM-88(E)
for nominal 0dBu signal levels, then push the Remote Dis-
able switch out for remote controllability.
If you still have problems, contact your Ashly
dealer or call Ashly direct at (800) 828-6308.
13
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
11. Warranty Information
We thank you for expression of confidence in Ashly
products. The unit you have just purchased is protected by
a limited five year warranty. To establish the warranty, you
must first complete 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 _________________________
12. SPECIFICATIONS:
12.1 Input
Input Type: 1/4" TRS (VCM-88), Euroblock (VCM-88E)
Input Impedance: 20K ohm balanced, 10K ohm unbalanced
Max input level: +23dBu
Input jack may be internally selected as a single in/out insert
12.2 Channel Outputs
Output Type: 1/4" TRS (VCM-88), Euroblock (VCM-88E)
Output Impedance: 200 ohm pseudo-balanced,
100 ohm unbalanced
Max output level: +22dBu
12.3 Master Output
Output Type: 1/4" TRS (VCM-88), Euroblock (VCM-88E)
Output Impedance: 200 ohm pseudo-balanced
100 ohm unbalanced
Max output level: +22dBu
12.4 Audio Performance
Nominal Gain: 0dB +/-0.5dB
Gain Range: +20dB to -75dB
Frequency Response: +/-0.2dB 20Hz-20KHz
THD: <0.05% at 0dBu, 20Hz-20KHz
Output Hum & Noise:
<-94dBu 20Hz-20KHz unweighted
Crosstalk: <-80dB at 20KHz
12.5 Signal Present
Green LED turns on at -20dBu
12.6 Limiter
Threshold Range: -23dBu to +22dBu
Compression Ratio: 10:1
12.7 RD-8 Data Input
Input Type: XLR (VCM-88), Euroblock (VCM-88E)
pin 2=data, pin 3=+V, pin 1=ground
Data Format: 2Vp raised-cosine,
12.8 RS-232 Input
Input Type: D-Sub 9 pin female
pin 3=data, pin 5=ground
1 start, 9 data, 1 stop bits at 9600 baud
12.9 DC Control Inputs
Input Type: DB 15-pin female connector (VCM-88)
Euroblock (VCM-88E)
Control Voltage: -4V to +15V provided for
external 10K ohm potentiometers
12.10 Overall
Size: 19" x 1.75" x 6"
(483mm x 44mm x 152mm)
Power Requirements: 100-125VAC, 50-60Hz 18W
(240V available)
Shipping Weight: 10 lbs. (4.5kg)
Net weight: 6.9 lbs. (3.1kg)
12.11 RD-8, RW-8 Specifications
Fader Range: +10dB to -75dB
(master fader at 0dB)
Data/Power Connector: Male XLR jack
Max Data Cable Length:
1500 ft. of 24 ga. twisted pair
Data Format: 9600 baud, 2Vp raised cosine
Data crosstalk to audio:
<-110 dB along 1000' of 150 ohm shielded cable
Power Requirements:
Phantom powered by VCM-88(E)
Shipping Weight: 3 lbs. (1.4kg)
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
14
13. Dimensional Drawings
0.79
7.94 (202)
emote
e!el
"o$trol
allountController
0.38
(20)
R-8
RD-8
Remote
Level
Control
1.60
14. Common Applications
• Eight In, Eight Out Individual Channel Remote Control
Use for individual mixer channel or subgroup remote control, especially suited for situations where the audio equipment
rack is installed away from an adequate listening point. Also useful to control monitor levels/mixes from the front-of-
house position. Separate input/output connectors or single jack TRS patch available. Control with RD-8, RW-8,
Custom DC Voltage Controller, AMX or Crestron Touch Screen Systems, or Ashly Protea System Software.
• Eight In, One Out For Remote Control Sub-Mixing
Use up to eight inputs and the Master Output to allow mixdown of all VCM-88(E) inputs. Individual channel pass
through is available to daisy-chain multiple VCM-88(E) units together for personal monitor mixes. Control with RD-8,
RW-8, Custom DC Voltage Controller, AMX or Crestron Touch Screen Systems, or Ashly Protea System Software.
• One In, Eight Out For Remote Control of Distributed Zones
Use Input Channel Patch to internally jump one channel’s input into one or more other inputs for distribution of single
audio signal. Control with RD-8, RW-8, Custom DC Voltage Controller, AMX or Crestron Touch Screen Systems, or
Ashly Protea System Software.
• Limiter With Threshold Control On All Eight Channels
Use VCM-88(E) as stand-alone eight channel, true VCA peak limiter, with adjustable threshold on each channel. No
controller is required.
DiensionalDrainor!CM-88an"!CM-88#inInches$%
0.10 (2.5)
6.00 (152)
17.00 (432)
1.25
1.75
1.15 (29)
(44.5)
(31.8)
15
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
+
C11
J_3
R35
C_7
R_8
R_7
+
C_5
C_6
-
+
U_1B
R_4
-
+
U6C
R65
+
C_1
VR2
R70
D20
D23
D22
R12
-
+
U4A
R45
D12
R37
X7
X6
X5
X4
X3
X2
X1
X0
GCBA
4
2
5
1
12
15
14
13
VEE
3
16
891011
6/EN
VCC
7
HC4051
U3
-
+
U_3B
R5
-
+
U_1A
R6
R4
Q7
R_9
C_8
R23
R7
C7
R_11
R_19
R_17
18
6254
37
U_2
J_1
R_20
R_12
R_3
R_23
Q_2
-
+
U_4B
R_28
R_29
D_2
D_1
-
+
U_4A
R_33
VR_3
R_27
R_30
-
+
U_3A
+
C_11
+
C_10
R_26
R_25
R_24
R33
R_35
Q_3
D_4
D6
D4
D5 D3
C14
+
C25 R56
D7
C23
Q1
L1-8
R61
R62
R63
D1
D2
R1
L1-7
-
+
U6D
R73
R72
Q5
R18
R48
R_16
R_18
R_13
R_15
R31
J7
Q2 R_21
SW1
+
C8
D30
R_5
R_6
D_5
Q_1
J8-8
R60
J6
Q3
VR_1
D19
R29
C22
D18
D26
R71
TP4
TP2
R30
R24
R25
R_31
C12
+
C13
R21
C9
C10
R47
X1
R66
R46
R_22
R69
R8
D28
C20
D29 R59
R58
R57
SW3L
SW3R
R55R44
-
+
U6B
-
+
U6A
R64
R68
C21
VR1
R3
R77
R75
R_34
R_32
C6
U9 D8
D9
D13
D11
+
C24
D10
J2
R26
+
C19
+
C18
U7
U8
S1 SW2
+
C16
+
C17
L1
R67
C15
D21
R9
R10
-
+
U4B
R11
R22
TP1
Q6
R_10
C_2
C43
R27
R83 C41
VR_2
J13
C5
R2
Q4
+
C_3
R36
D24
D25
U11
R19
1
2
3
J1
J8
C30 C29
C31 C32 C33 C34 C35 C36 C37 C38 C28
R20
C40
-
+
U10B
-
+
U10A
R82
R80
R84
R81
C26 C27
+
C42
R_14
J8-12
J12 R85
MC68HC11A1FN
STRB/RW
STRA/AS
VRL
VRH
MODA/LIR
MODB/VSTBY
/IRQ
/XIRQ
/RESET
XTAL
EXTAL
VSS
VDD
PE7/AN7
PE6/AN6
PE5/AN5
PE4/AN4
PE3/AN3
PE2/AN2
PE1/AN1
PE0/AN0
PD5/SS
PD4/SCK
PD3/MOSI
PD2/MISO
PD1/TxD
PD0/RxD
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
PA7/PAI/OC1
PA6/OC2/OC1
PA5/OC3/OC1
PA4/OC4/OC1
PA3/OC5/OC1
PA2/IC0
PA1/IC2
PA0/IC3
E
52 PIN PLCC
51
52
3
2
19
18
17
8
7
1
26
50
48
46
44
49
47
45
43
25
24
23
22
21
20
16
15
14
13
12
11
10
9
4
6
35
36
37
38
39
40
41
42
27
28
29
30
31
5
32
34
33
U5
R28 J_4 J_2
+
C_4
R_2
R_1
R_36 D_3
+
C_12
R_37
-
+
U_5B
R_51
R_50
C_51 C_52
C_50
R_38
R_39
Q_4
D_6
R74
R76
6789
12345
J14
U2E
L3
L4 L5
C4
C2
L2
R13
3
524
1
J4
8
7
6
5
3
2
U1
D27
R15
U2D
R16
R17
3
524
1
J5
R14
C1
C3
TP3
X
x 11
.01uF
34184
34184
34184
20K
LOG
25K
-18
7918
7818
35V
1000
35V
1000
4003
THRESH
100K
6.8K
4125
62K
15K
4123
1.5uF
1.5uF
68K
10:1RATIO
100
1K
CW
LIMIT
15K
JRD
DRAWING NO. 10S5310E
8-27-2003
E
REPLACE VR2 WITH 0 OHM JUMPER - ADD H30N01500 HEAT SINK TO U11
R_19 FROM 68 TO 33 - R_20 FROM 2.4K TO 5.6K - REMOVE R_21 R_22 VR1
CHANGE VCA TO 2180LC - R69-70 FROM 220 TO 2K - R_10/_11/_23 FROM 2K TO 1K
5310-1E8-27-03635
VCX-80/VCM-88
WEBSTER, NY 14580-9103
847 HOLT ROAD
PCB REVSCH REVDCN DESCRIPTIONDATE
8 CHANNEL REMOTE VCA/LIMITER
SCHEMATIC DIAGRAM
REV.
DATE:
DATE:
OFSHEETSCALE:
APPROVED:
DRAWN:
ASHLY AUDIO INC.
ASHLY
ADJ
SYM
(AMX)
ASHLY
CRESTRON
RS232
DATA CONFIGURATION
RS-232
MIDI CONTROL
VCM-88 ONLY
VCM-88 ONLY
VCM-88 ONLY
SIG PRES
ALL DIODES 1N4003, ALL UNMARKED RESISTORS 10K
UNLESS OTHERWISE MARKED, ALL RESISTORS 5% 1/4W, ALL CAP VALUES uF,
NOTES:
O
CONFIGURATION
DATA
MIDI
T
V
PATCH OUTPUT PIN
P- SHUNT
INPUT
PATCH
1-JACK INSERT
2-JACK INSERT
PINS
INPUT
PATCH
DATA DIS
REM DIS
HC11 - PIN20
RxD
+5
MIDI THRU
MIDI IN
-18
IN SERIES
LED CIRCUITS
7
OFF AT -19dBu
ON AT -18dBu
SIG PRES PRES
SIG
-.5VDC
+18
-18
PASS-THRU
VCA
(PD4)
REM DIS
10.00K IS +/-.1%
CW
L
R
INOUT
IEC 320
ACINLET
CW
109
BUS
SUMMING
SUMMED OUTPUT
CHANNELS 1-8
-23dBU TO +23dBu
-4VDC
$00=+15.1V=-75dB
-4VDC
35mA LIMIT
33mA I LIMIT
DATA IN
DAC
SYNC
1353617241411
3
2
1
3
1
2
3
2
1
10
11
122
3
4
5
120/240
1
3
2
5.33dB/VOLT SCALE
-75dB TO +20dB RANGE
$FF=-3.75V=+20dB
$00=+5.81V
$FF=-1.45V
Vo = (-0.727)Vi + 5.81
$CD=8V ON RESET
$00=0V
$FF=9.96V
0dB SHIFT
ADJ
NULL
-18
-18
DATA DISABLE
+15
10K LINEAR
HC11 PIN 25
FROM PD5
+5
NEUT
GROUND
HOT
BANK SELECT
43210
+5
UNIVERSAL
+5
48KHz LPF
POWER
10.0K
40.2K
THRESH.
1 VOLT
RING=OUT
TIP=INPUT
FOR 1-JACK:
+18
CONNECTOR FOR DC CTRL
MASTER
EXAMPLE OF DC CONTROL OF CHANNEL 1:
240V120V
IN/IO
CW
TO DSUB
4800bps
RESET CIRCUIT
+5
MASTER ATTENUATOR
+18
8-BIT DAC
CW
DISABLE
REMOTE
IN
OUT
DISABLE
REMOTE
IN
OUT
LIMIT
-18
ATTACK
RELEASE
IN SERIES
7 LED’S
-18
-18
UNREG.
+27
+27
+18
+18
+18
+78VDC
-18
+5
+18
1 OF 8 CHANNELS
LEVEL SHIFTER/SCALER
-18
-18
DATA
REMOTE
+5
+5
+5
+18
+18
+5V
+5V
+5V
+5V
+5V
DATA INPUT
51P7106
65VAC FROM
-18
Vo
Vi
OUTPUT
CH.1
CH.1
HEAT SINK
None
0
None
None
None
-18
+18
5.6K
33 1K
1K
1K
2K
2K
2180LC
47K
15K
7815
.001uF
100K
100K
BEAD
BEAD
BEAD BEAD
.001
.001
.001 .001
4148
220
220
6N138
220
2.4K
2.4K
G
4125
100K
.1uF
10M
.1uF
LM393
.1uF
1M
1M
1.5uF
1K
150K470K
751
X
X
4.7K
100V
47
100
100
4560
4560
JUMP
9.76K
1M10U
33
33
X
X
22
X
X
X
X
9316.34K
18K
3418434184
34184
3418410K
10.0K
5.1V
4125
4125
4123
100K
JUMP
X
1N270
3.3K
.001U
ON SINK
18P18P
8MHz
10M
4123
27K
4125
4148
1M .1U
27P
27P
19.6K
19.6K
18K
G
1K
4560
34184
B10K
10.0K
10.0K
10.0K
1M
27K
10P
LM393
4148
4148
.1U
.1U
300K
20K
10K
40.2K
JUMP
10.00K
JUMP
1M
300K
150K
40.2K
40.2K
10.00K
10.00K
RED
330
51P7106
4148
4148
4148
4148
4148
YEL
2.4K
2.4K
4123
4148
1M
2K
971
100V
.1U
1/2AGC
1.5U1.5U
1.5U
7805
GREEN
754
LM393
47U
4.7K
1M
100
100
100
100
27P
10.0K
10.0K
10.0K
10.0K
15.8K
.1U10U
47UF
47UF
47UF
6.8V
FEMALE XLR
4003
.1uF
10
TIP29C
4123
.001
20K
100V
27V
100uF
4560
47U
-18
13
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
4
12
34
8
9
10
14
12
13
1
3
2
7
5
6
10
1189
2
111287654321109
10P5312
10P5312
BLACK
WIRE
DC CONTROL
CARD
RS232
D15D14
D17
D16
Schematic Diagram: VCM-88
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
16
12345678
A
B
C
D
E
8
7654321
E
D
C
B
A
B
APPROVED: Dw
g
#
Size Drawn B
y
Rev.
B
10s5320b-1.Sch
10s5320
VCM-88E, 8 Channel Remote VCA / Limiter
Dan Szaba
Sheet # of
14
847 Holt Road
Webster, NY 14580-9103
Phone: Fax:
(716) 872-0010 (716) 872-0739
Print Date
6-Jan-2004
11:31:11
A->B @ 157%
C
$VKO\ $XGLR ,QF
MODA/LIR
3
PA3/OC5/OC1
31
PA7/PAI/OC1
27
PC0/AD0 9
PC1/AD1 10
PC2/AD2 11
PC3/AD3 12
PC4/AD4 13
PC5/AD5 14
PC6/AD6 15
PC7/AD7 16
PD0/RXD 20
PD1/TXD 21
PD2/MISO 22
PD3/MOSI 23
PD4/SCK 24
PD5/SS 25
RST
17
STRA/AS
4
IRQ
19
EXTAL
7
MODB/VSTBY
2
PA0/IC3
34
PA1/C2
33
PA2/C1
32
PE0/AN0
43
PE1/AN1
45
PE2/AN2
47
PE3/AN3
49
PE4/AN4
44
PE5/AN5
46
PE6/AN6
48
PE7/AN7
50
VRH
52
VRL
51
XIRQ/VPP
18
E5
PA4/OC4/OC1
30
PA5/OC3/OC1
29
PA6/OC2/OC1
28
PB0/A8 42
PB1/A9 41
PB2/A10 40
PB3/A11 39
PB4/A12 38
PB5/A13 37
PB6/A14 36
PB7/A15 35
STRB/R/W 6
XTAL 8
+5
26
GND
1
U1
*M68HC711E9*
X1 8.00MHZ
(in socket)
R38
10M
C12
18P
C13
18P
3
2
1
84
U2A
NJM2903
5
6
7
U2B
NJM2903
R32
1M
R3
10K
R13
10K
R1
27K
D2
1N4148
D3
1N4148
+5
R7 10K
R6 10K
R5 10K
R4 10K
+18
R14
10K
R34
1M
/Low Power Detect
/Reset Circuit (5vRail < 4.1v)
1
J3
none
SYNC
Mux/EN
+5
R16 10K
R15 10K
R17 10K
R18 10K
R19 10K
R20 10K
R21 10K
Ptcol0
Ptcol1
Chan0
Chan1
Chan2
Chan3
R24
10K
C19
10U C8
.1U
R33 1M
R57 470K
R40 300K
R58 150K
R60 40.2K
R61 40.2K
R63 10.00K
R64 10.00K
R39 300K
R59 150K
R66 20K
R22 10K
R62 40.2K
R65 10.00K
5
6
7
U7B
MC34184
3
2
1
11 4
U7A
MC34184
12
13
14
U7D
MC34184
10
9
8
U7C
MC34184
+5
R41
10.0K
1
J1
none
DAC
Master Attenuator
R42
10.0K
R43
10.0K
+18
-18
C2
.1U
C5
.1U
R44
10.0K
R45
18K
R46
18K
VR2
10K
-18
0dB Trim
R47
7.15K
1
J2
none
Vo
X4 1
X6 2
3
X7 4
X5 5
/EN
6
VEE
7
G
8C
9B
10 A
11
X3 12
X0 13
X1 14
X2 15
VCC 16
U3
74HC4051
Mux/EN
(18vRail < 15.1v)
R55
330
D13
R [T1]
2
3
1
SW3A
SW DPDT
Remote Disable
D1
1N754A C14
47U
6.8V
R9
10K
+18
C4
.1U
R35
1M
R49
2K
R2
27K
D4
1N4148
D9
G [T1]
C15
47U
Q4
2N4123
Q1
2N4125
1
J4 none
RXD
Data In
TXD
+5
+18
Remote Data
L
G
N
J7
AC-INLET
F2
FUSE CLIP [3AG]
F1
3AG ½ AMP AGC out
SW1
SW DPDT
out
SW2
SW DPDT
2
3
10
7
4
5
8
11
12
T1
[XFMR-PCB] P85D07106
D25 1N4004
D26
1N4004
D28
1N4004
D27
1N4004
C41
.1U
C42
.1U
R48
2K
R50
2K
C43
1000U 35V
C44
1000U 35V
In
1
2
Out 3
U10
7818
In
2
1
Out 3
U11
7918
D21 1N4004
D29 1N4004
D30
1N4004
D31
1N4004
C45
1.5U
C46
1.5U
+18
-18
120V in=240V
D10
G [T1]
Power C48
470U
In
1
2
Out 3
U12
7805 C47
1.5U
D32
1N4004
D22 1N4004
+5
D19
1N4004
D17
1N4004
D20
1N4004
D18
1N4004
C40
100U
R67
20K
D33
1N971B
C24
.001U
1
23
Q6
TIP29C
Q5
2N4123
R80
22
R78
none
R79
none
+78VDC
5
6
4
SW3B
SW DPDT
R71
1K
-18
D23
1N4004
D24
1N4004
R81
10
27V
R23
10K
R68
33
R69
33
Q2
2N4125
Q3
2N4125
D11
1N5231B
D5
1N4148
D6
1N4148
5.1V
-18
-4
35mA LIMIT
H1
BRACKET 4-40
/DATA IN
L1
BEAD
L4
BEAD
C22
.001U
C23
.001U
R77
220
D8
1N4148
2
3
8
7
6
5
U9
6N138
R70 1K
R30 10K
+5
4
5
6
U8B
74HC08
1
2
3
GND
7
+5 14
U8A
74HC08
11
12
13
U8D
74HC08
8
9
10
U8C
74HC08
+5
C9
.1U R72
100K
R75
220
R76
220
+5
L2
BEAD
L3
BEAD
C20
.001U
C21
.001U
/DATA OUT
Unused Gates
DATAin
RemotePower
(To Daughter Card)
Remote Ground (RG)
3
2
1
84
U6A
4560
5
6
7
U6B
4560
R36
1M
R73
100K
+18
R25
10K
R26
10K
D7
1N4148
0.6V
RD/RS232in
D12
1N5231B5.1V
D14
1N5818
ConfigA
R27
10K
+5
D15
1N746A
D16
1N746A
+18
-18
C10
.1U
C11
.1U
R37 1M
R29
10K
R28
10K
R74
100K
+5
ConfigB
2.5V
R56
330
RS232out
114
213
312
411
510
69
78
J13A
DIP14 [SOCKET]
Chan0
Chan1
Chan2
Chan3
Ptcol0
Ptcol1
114
213
312
411
510
69
78
J6A
DIP14 [SOCKET]
DCmaster
In
1
2
Out 3
U4
7815
DC8
R51
0 OHM
-4
3
2
1
8 4
U5A
4560
5
6
7
U5B
4560
R11
10K
R10
10K R52
4.7K
-18
+18
C3
.1U
C7
.1U
C16
47U
SUM
C18
none
C17
none
DC4
DC2
DC7
DC1
DC6
DC3
DC5
Daughter Card
10s5320b-2.Sch
Analog Channels 1-4
10s5320b-3.Sch
(To Daughter Card)
MUX1
MUX2
MUX3
MUX4
MUX1
MUX2
MUX3
MUX4
MUX5
MUX6
MUX7
MUX8
SUM
DC1
DC2
DC3
DC4
DC1
DC2
DC3
DC4
DC5
DC6
DC7
DC8
Force connect: Earth, Analog, Digital, & Remote Grounds
EG AG DG RG
* Connect AC Inlet G to chasis using:
m70b22550 - 22ga green wire,
s45w08030 - #6 (small) ring 16ga,
f10b06331 - 6-32 x 5/16" screw,
f30z06301 - #6 split ring washer,
f40z06300 - 6-32 hex nut
C1
.1U
R8 10K
* STAR GROUND
(to HC11 pin-31)
ControlCW
ControlCCW
MasterOut
+27
Analog Channels 5-6
10s5320b-4.Sch
MUX5
MUX6
MUX7
MUX8
DC5
DC6
DC7
DC8
SUM
H2
BRACKET 4-40
H3
BRACKET 4-40
H4
BRACKET 4-40
H5
BRACKET 4-40
Front panel PCB mounting hardware
R85 10K
SigLED4
LimLED4
LimLED4
SigLED4
(LEDs in series)
(+5V rail holds for 350ms after18V rail drops to 15V)
$FF=-1.45V
$00=+5.81V
(to RIB2a-12)
C6
none
(SINK)
(SINK)
(SINK)
VR1
10K
6
5
4
3
2
1
J5
EUROBLOCK 6
+
-
+
-
G
IN
OUT
n/c
DATA
ACN
ACH
ACH2
H9
BRACKET 4-40
HS2
HEAT SINK [3 X TO-220 1.625"]
R54
3.16K
R53
40.2K
+1.1v
C49
47U D34
1N4004
HS1
None
Schematic Diagram: VCM-88E, Page 1 of 4
17
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
12345678
A
B
C
D
E
8
7654321
E
D
C
B
A
B
APPROVED: Dw
g
#
Size Drawn B
y
Rev.
B
10s5320b-3.Sch
10s5322
VCM-88E Analo
g
Channels 1-4
Dan Szaba
Sheet # of
34
847 Holt Road
Webster, NY 14580-9103
Phone: Fax:
(716) 872-0010 (716) 872-0739
Print Date
6-Jan-2004
11:31:58
A->B @ 157%
C
$VKO\ $XGLR ,QF
10
9
8
U101C
TLE2064
12
13
14
U121D
TLE2064
C101
10U
R101
1M
MUX1
R103
15.8K
R102
9.76K
-18
+18
-3.75V=+20dB
+15.1V=-75dB
DC1
3
2
1
11 4
U121A
TLE2064
12
13
14
U201D
TLE2064
10
9
8
U201C
TLE2064
12
13
14
U101D
TLE2064
+18
-18
1
2
3
4
J102
HDRM 1X4
C102
47U
C103
47U
C107 27P
C104
27P
R110
10.0K
R111
10.0K
C106
.1U
C105
.1U
R112
10.0K
R113
10.0K
2
1 8
5 7
4
6
3
+
-
U102
2180LC
R114
19.6K
R105
1K
R104
1K
R106
33
R115
5.6K
+18
-18
C108
.1U
R109
100K
R108
100K
DC1
MUX1
J103
R116
19.6K
C111
27P
C109
.1U
C112
47U
C110
.1U
R123 15K
R122 18K
R125
62K
R124 1K
R126 15K
D102
1N4148
D101
1N4148
VR100
25KLOG
-18
Q101
2N4125
-18
THRESHOLD
R127
100
RATIO 10:1
C114
1.5U R130
6.8K
R129
68K
R128 100K
C113
1.5U
RELEASE
Q102
2N4123
+18
R132
2.7K
R131
1M
+18
R133
47K
Q103
2N4123
R134
2.4K
-18
D103
1N4148
D104
Y [T1]
LimLED1
6
5
4
3
2
1
J101
EUROBLOCK 6
+
-
G
+
-
G
Out1
IN
OUT
O1
Patch Input
R118
10K
R117
10K
SUM
R119
100
O1
1
2
3
J104
HDRM 1X3
R120
100
Out1
R121
100
1
J105
Patch
R107
1K
Output
5
6
7
U101B
TLE2064
10
9
8
U121C
TLE2064
C201
10U
R201
1M
MUX2
R203
15.8K
R202
9.76K
-18
+18
-3.75V=+20dB
+15.1V=-75dB
DC2
5
6
7
U121B
TLE2064
3
2
1
114
U201A
TLE2064
5
6
7
U201B
TLE2064
3
2
1
11 4
U101A
TLE2064
1
2
3
4
J202
HDRM 1X4
C202
47U
C203
47U
C207 27P
C204
27P
R210
10.0K
R211
10.0K
C206
.1U
C205
.1U
R212
10.0K
R213
10.0K
2
1 8
5 7
4
6
3
+
-
U202
2180LC
R214
19.6K
R205
1K
R204
1K
R206
33
R215
5.6K
+18
-18
C208
.1U
R209
100K
R208
100K
DC2
MUX2
J203
R216
19.6K
C211
27P
C212
47U
R223 15K
R222 18K
R225
62K
R224 1K
R226
15K
D202
1N4148
D201
1N4148
VR200
25KLOG
-18
Q201
2N4125
-18
THRESHOLD
R227
100
RATIO 10:1
C214
1.5U R230
6.8K
R229
68K
R228 100K
C213
1.5U
RELEASE
Q202
2N4123
+18
R232
2.7K
R231
1M
+18
R233
47K
Q203
2N4123
D203
1N4148
D204
Y [T1]
LimLED1
6
5
4
3
2
1
J201
EUROBLOCK 6
+
-
G
+
-
G
Out2
IN
OUT
O2
Patch Input
R218
10K
R217
10K
SUM
R219
100
O2
1
2
3
J204
HDRM 1X3
R220
100
Out2
R221
100
1
J205
Patch
R207
1K
Output
LimLED2
5
6
7
U122B
NJM2903
R235
1K
D205
1N4148
C215
1.5U
R236
1M
R238
1M
R239
10M
-18-18
C216 .1U
R240
100K
Q204
2N4125 D206
G [T1]
SigLED1
SigLED2
LIMIT 2LIMIT 1
SIG PRES 2
SIG2
3
2
1
84
U122A
NJM2903
R135
1K
D105
1N4148
C115
1.5U
R136
1M
R138
1M
R139
10M
+18
C117
.1U
-18
C118
.1U
-18
C116 .1U
R140
100K
R141
2.4K
Q104
2N4125 D106
G [T1]
SigLED1
-18
SIG PRES 1
SIG2
H120
BRACKET 4-40
10
9
8
U301C
TLE2064
12
13
14
U341D
TLE2064
C301
10U
R301
1M
MUX3
R303
15.8K
R302
9.76K
+18
-18
-3.75V=+20dB
+15.1V=-75dB
DC3
3
2
1
11 4
U341A
TLE2064
12
13
14
U401D
TLE2064
10
9
8
U401C
TLE2064
12
13
14
U301D
TLE2064
+18
-18
1
2
3
4
J302
HDRM 1X4
C302
47U
C303
47U
C307 27P
C304
27P
R310
10.0K
R311
10.0K
C306
.1U
C305
.1U
R312
10.0K
R313
10.0K
2
1 8
5 7
4
6
3
+
-
U302
2180LC
R314
19.6K
R305
1K
R304
1K
R306
33
R315
5.6K
+18
-18
C308
.1U
R309
100K
R308
100K
DC3
MUX3
J303
R316
19.6K
C311
27P
C309
.1U
C312
47U
C310
.1U
R323 15K
R322 18K
R325
62K
R324 1K
R326 15K
D302
1N4148
D301
1N4148
VR300
25KLOG
-18
Q301
2N4125
-18
THRESHOLD
R327
100
RATIO 10:1
C314
1.5U R330
6.8K
R329
68K
R328 100K
C313
1.5U
RELEASE
Q302
2N4123
+18
R332
2.7K
R331
1M
+18
R333
47K
Q303
2N4123
LimLED2
D303
1N4148
D304
Y [T1]
LimLED3
6
5
4
3
2
1
J301
EUROBLOCK 6
+
-
G
+
-
G
Out3
IN
OUT
O3
Patch Input
R318
10K
R317
10K
SUM
R319
100
O3
1
2
3
J304
HDRM 1X3
R320
100
Out3
R321
100
1
J305
Patch
R307
1K
Output
5
6
7
U301B
TLE2064
10
9
8
U341C
TLE2064
C401
10U
R401
1M
MUX4
R403
15.8K
R402
9.76K
-18
+18
-3.75V=+20dB
+15.1V=-75dB
DC4
5
6
7
U341B
TLE2064
3
2
1
114
U401A
TLE2064
5
6
7
U401B
TLE2064
3
2
1
11 4
U301A
TLE2064
1
2
3
4
J402
HDRM 1X4
C402
47U
C403
47U
C407 27P
C404
27P
R410
10.0K
R411
10.0K
C406
.1U
C405
.1U
R412
10.0K
R413
10.0K
2
1 8
5 7
4
6
3
+
-
U402
2180LC
R414
19.6K
R405
1K
R404
1K
R406
33
R415
5.6K
+18
-18
C408
.1U
R409
100K
R408
100K
DC4
MUX4
J403
R416
19.6K
C411
27P
C412
47U
R423 15K
R422 18K
R425
62K
R424 1K
R426 15K
D402
1N4148
D401
1N4148
VR400
25KLOG
-18
Q401
2N4125
-18
THRESHOLD
R427
100
RATIO 10:1
C414
1.5U R430
6.8K
R429
68K
R428 100K
C413
1.5U
RELEASE
Q402
2N4123
+18
R432
2.7K
R431
1M
+18
R433
47K
Q403
2N4123
D403
1N4148
D404
Y [T1]
LimLED3
6
5
4
3
2
1
J401
EUROBLOCK 6
+
-
G
+
-
G
Out4
IN
OUT
O4
Patch Input
R418
10K
R417
10K
SUM
R419
100
O4
1
2
3
J404
HDRM 1X3
R420
100
Out4
R421
100
1
J405
Patch
R407
1K
Output
LimLED4
5
6
7
U342B
NJM2903
R435
1K
D405
1N4148
C415
1.5U
R436
1M
R438
1M
R439
10M
-18-18
C416 .1U
R440
100K
Q404
2N4125 D406
G [T1]
SigLED3
SigLED4
LIMIT 4LIMIT 3
SIG PRES 4
SIG4
3
2
1
84
U342A
NJM2903
R335
1K
D305
1N4148
C315
1.5U
R336
1M
R338
1M
R339
10M
+18
C317
.1U
-18
C318
.1U
-18
C316 .1U
R340
100K
Q304
2N4125 D306
G [T1]
SigLED3
SigLED2
SIG PRES 3
SIG4
H340
BRACKET 4-40
J106
J107 J206
J207
J407
J406J307
1X2 FEMALE SHUNT
J306
R237
20K
R337
20K
R437
20K
R137
20K
(-20 dBu)
(-20 dBu)
(-20 dBu)
(-20 dBu)
CH.1
CH.3
CH.2
CH.4
P
2
1
P
2
1
P
2
1
P
2
1
V
T
O
V
T
O
V
T
O
V
T
O
Schematic Diagram: VCM-88E, Page 2 of 4
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
18
12345678
A
B
C
D
E
8
7654321
E
D
C
B
A
B
APPROVED: Dw
g
#
Size Drawn B
y
Rev.
B
10s5320b-4.Sch
10s5323
VCM-88E Analo
g
Channels 5-8
Dan Szaba
Sheet # of
44
847 Holt Road
Webster, NY 14580-9103
Phone: Fax:
(716) 872-0010 (716) 872-0739
Print Date
6-Jan-2004
11:32:28
A->B @ 157%
C
$VKO\ $XGLR ,QF
10
9
8
U501C
TLE2064
12
13
14
U561D
TLE2064
C501
10U
R501
1M
MUX5
R503
15.8K
R502
9.76K
+18
-18
-3.75V=+20dB
+15.1V=-75dB
DC5
3
2
1
11 4
U561A
TLE2064
12
13
14
U601D
TLE2064
10
9
8
U601C
TLE2064
12
13
14
U501D
TLE2064
+18
-18
1
2
3
4
J502
HDRM 1X4
C502
47U
C503
47U
C507 27P
C504
27P
R510
10.0K
R511
10.0K
C506
.1U
C505
.1U
R512
10.0K
R513
10.0K
2
1 8
5 7
4
6
3
+
-
U502
2180LC
R514
19.6K
R505
1K
R504
1K
R506
33
R515
5.6K
+18
-18
C508
.1U
R509
100K
R508
100K
DC5
MUX5
J503
R516
19.6K
C511
27P
C509
.1U
C512
47U
C510
.1U
R523 15K
R522 18K
R525
62K
R524 1K
R526 15K
D502
1N4148
D501
1N4148
VR500
25KLOG
-18
Q501
2N4125
-18
THRESHOLD
R527
100
RATIO 10:1
C514
1.5U R530
6.8K
R529
68K
R528 100K
C513
1.5U
RELEASE
Q502
2N4123
+18
R532
2.7K
R531
1M
+18
R533
47K
Q503
2N4123
LimLED4
D503
1N4148
D504
Y [T1]
LimLED5
6
5
4
3
2
1
J501
EUROBLOCK 6
+
-
G
+
-
G
Out5
IN
OUT
O5
Patch Input
R518
10K
R517
10K
SUM
R519
100
O5
1
2
3
J504
HDRM 1X3
R520
100
Out5
R521
100
1
J505
Patch
R507
1K
Output
5
6
7
U501B
TLE2064
10
9
8
U561C
TLE2064
C601
10U
R601
1M
MUX6
R603
15.8K
R602
9.76K
-18
+18
-3.75V=+20dB
+15.1V=-75dB
DC6
5
6
7
U561B
TLE2064
3
2
1
114
U601A
TLE2064
5
6
7
U601B
TLE2064
3
2
1
11 4
U501A
TLE2064
1
2
3
4
J602
HDRM 1X4
C602
47U
C603
47U
C607 27P
C604
27P
R610
10.0K
R611
10.0K
C606
.1U
C605
.1U
R612
10.0K
R613
10.0K
2
1 8
5 7
4
6
3
+
-
U602
2180LC
R614
19.6K
R605
1K
R604
1K
R606
33
R615
5.6K
+18
-18
C608
.1U
R609
100K
R608
100K
DC6
MUX6
J603
R616
19.6K
C611
27P
C612
47U
R623 15K
R622 18K
R625
62K
R624 1K
R626 15K
D602
1N4148
D601
1N4148
VR600
25KLOG
-18
Q601
2N4125
-18
THRESHOLD
R627
100
RATIO 10:1
C614
1.5U R630
6.8K
R629
68K
R628 100K
C613
1.5U
RELEASE
Q602
2N4123
+18
R632
2.7K
R631
1M
+18
R633
47K
Q603
2N4123
D603
1N4148
D604
Y [T1]
LimLED5
6
5
4
3
2
1
J601
EUROBLOCK 6
+
-
G
+
-
G
Out6
IN
OUT
O6
Patch Input
R618
10K
R617
10K
SUM
R619
100
O6
1
2
3
J604
HDRM 1X3
R620
100
Out6
R621
100
1
J605
Patch
R607
1K
Output
LimLED6
5
6
7
U562B
NJM2903
R635
1K
D605
1N4148
C615
1.5U
R636
1M
R638
1M
R639
10M
-18-18
C616 .1U
R640
100K
Q604
2N4125 D606
G [T1]
SigLED5
SigLED6
LIMIT 6LIMIT 5
SIG PRES 6
SIG6
3
2
1
84
U562A
NJM2903
R535
1K
D505
1N4148
C515
1.5U
R536
1M
R538
1M
R539
10M
+18
C517
.1U
-18
C518
.1U
-18
C516 .1U
R540
100K
Q504
2N4125 D506
G [T1]
SigLED5
SigLED4
SIG PRES 5
SIG6
H560
BRACKET 4-40
10
9
8
U701C
TLE2064
12
13
14
U781D
TLE2064
C701
10U
R701
1M
MUX7
R703
15.8K
R702
9.76K
+18
-18
-3.75V=+20dB
+15.1V=-75dB
DC7
3
2
1
11 4
U781A
TLE2064
12
13
14
U801D
TLE2064
10
9
8
U801C
TLE2064
12
13
14
U701D
TLE2064
+18
-18
1
2
3
4
J702
HDRM 1X4
C702
47U
C703
47U
C707 27P
C704
27P
R710
10.0K
R711
10.0K
C706
.1U
C705
.1U
R712
10.0K
R713
10.0K
2
1 8
5 7
4
6
3
+
-
U702
2180LC
R714
19.6K
R705
1K
R704
1K
R706
33
R715
5.6K
+18
-18
C708
.1U
R709
100K
R708
100K
DC7
MUX7
J703
R716
19.6K
C711
27P
C709
.1U
C712
47U
C710
.1U
R723 15K
R722 18K
R725
62K
R724 1K
R726 15K
D702
1N4148
D701
1N4148
VR700
25KLOG
-18
Q701
2N4125
-18
THRESHOLD
R727
100
RATIO 10:1
C714
1.5U R730
6.8K
R729
68K
R728 100K
C713
1.5U
RELEASE
Q702
2N4123
+18
R732
2.7K
R731
1M
+18
R733
47K
Q703
2N4123
LimLED6
D703
1N4148
D704
Y [T1]
LimLED7
6
5
4
3
2
1
J701
EUROBLOCK 6
+
-
G
+
-
G
Out7
IN
OUT
O7
Patch Input
R718
10K
R717
10K
SUM
R719
100
O7
1
2
3
J704
HDRM 1X3
R720
100
Out7
R721
100
1
J705
Patch
R707
1K
Output
5
6
7
U701B
TLE2064
10
9
8
U781C
TLE2064
C801
10U
R801
1M
MUX8
R803
15.8K
R802
9.76K
-18
+18
-3.75V=+20dB
+15.1V=-75dB
DC8
5
6
7
U781B
TLE2064
3
2
1
114
U801A
TLE2064
5
6
7
U801B
TLE2064
3
2
1
11 4
U701A
TLE2064
1
2
3
4
J802
HDRM 1X4
C802
47U
C803
47U
C807 27P
C804
27P
R810
10.0K
R811
10.0K
C806
.1U
C805
.1U
R812
10.0K
R813
10.0K
2
1 8
5 7
4
6
3
+
-
U802
2180LC
R814
19.6K
R805
1K
R804
1K
R806
33
R815
5.6K
+18
-18
C808
.1U
R809
100K
R808
100K
DC8
MUX8
J803
R816
19.6K
C811
27P
C812
47U
R823 15K
R822 18K
R825
62K
R824 1K
R826 15K
D802
1N4148
D801
1N4148
VR800
25KLOG
-18
Q801
2N4125
-18
THRESHOLD
R827
100
RATIO 10:1
C814
1.5U R830
6.8K
R829
68K
R828 100K
C813
1.5U
RELEASE
Q802
2N4123
+18
R832
2.7K
R831
1M
+18
R833
47K
Q803
2N4123
D803
1N4148
D804
Y [T1]
LimLED7
6
5
4
3
2
1
J801
EUROBLOCK 6
+
-
G
+
-
G
Out8
IN
OUT
O8
Patch Input
R818
10K
R817
10K
SUM
R819
100
O8
1
2
3
J804
HDRM 1X3
R820
100
Out8
R821
100
1
J805
Patch
R807
1K
Output
+27
5
6
7
U782B
NJM2903
R835
1K
D805
1N4148
C815
1.5U
R836
1M
R838
1M
R839
10M
-18-18
C816 .1U
R840
100K
Q804
2N4125 D806
G [T1]
SigLED7
+27
LIMIT 8LIMIT 7
SIG PRES 8
SIG8
3
2
1
84
U782A
NJM2903
R735
1K
D705
1N4148
C715
1.5U
R736
1M
R738
1M
R739
10M
+18
C717
.1U
-18
C718
.1U
-18
C716 .1U
R740
100K
Q704
2N4125 D706
G [T1]
SigLED7
SigLED6
SIG PRES 7
SIG8
H780
BRACKET 4-40
R841
2.4K
R834
2.4K
J506
J507
J706
J707 J806
J807
J607
J606
R637
20K
R537
20K
R837
20K
R737
20K
(-20 dBu)
(-20 dBu)
(-20 dBu)
(-20 dBu)
CH.5
CH.7
CH.6
CH.8
P
2
1
P
2
1
P
2
1
P
2
1
V
T
O
V
T
O
V
T
O
V
T
O
Schematic Diagram: VCM-88E, Page 3 of 4
19
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
1 2 3 45
A
B
C
D
5
4321
D
C
B
A
A
APPROVED: Dwg #
Size Drawn By Date Rev.
B
10s5320b-2.Sch
847 Holt Road
Webster, NY 14580-9103
6-Jan-2004
10s5321
VCM-88E Daughter Card
Dan Szaba
Sheet # of
24
Phone: Fax:
(716) 872-0010
(716) 872-0739
C
11:31:35
$VKO\ $XGLR ,QF
2
3
1
SW4A
SW DPDT
5
6
4
SW4B
SW DPDT
114
213
312
411
510
69
78
J13BDIP14 [SOCKET]
114
213
312
411
510
69
78
J6B DIP14 [SOCKET]
1
2
4
3
SW6
SW DIP2
1
2
3
4
8
7
6
5
SW5
SW DIP4
1
6
2
7
3
8
4
9
5
X1X
J10
DSUB 9F
3
2
1
J9
EUROBLOCK 3
3
2
1
J8
EUROBLOCK 3
6
5
4
3
2
1
J11
EUROBLOCK 6
6
5
4
3
2
1
J12
EUROBLOCK 6
R82
2.4K
REMOTE
L5
BEAD
C25
.001U
TXD
RD/RS232in
RS-232
L6
BEAD
L7
BEAD
C26
.001U
C27
.001U
R31
10K
RS232out
ConfigA
DATAin
ConfigB
CONFIG SWITCH
H6
BRACKET 4-40
R84
100
R83
100
PROTOCOLDEVICE ID
+
-
G
Chan0
Chan1
Chan2
Chan3
Ptcol0
Ptcol1
Data
RemotePower
RemoteGround
C28 .001U
C29 .001U
C30 .001U
C31 .001U
C32 .001U
C33 .001U
DC1
DC2
DC3
DC4
DC5
DC6
DC7
DC8
DCmaster
Control CCW
Aux Ground
Control CW
C35 .001U
C34 .001U
C36 .001U
C37 .001U
C38 .001U
C39 .001U
MASTER OUTPUT
DC CONTROL A
DC CONTROL B
H7
BRACKET 4-40
H8
BRACKET 4-40
00 = RD/RW-8/AMX/Crestron
01 = Protea System Software
10 = MIDI
11 = Legacy (Original VCX-80/AMX)
Schematic Diagram: VCM-88E, Page 4 of 4
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
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.
VCM R-3
20 Printed in USA 0204
R32
C16C15C14C13
R43
D13
VR1
SW2
VR9
R10
R51
VR2
D14
R44
R45
D15
VR3
R52
SW3
SW4
R53
VR4
D16
C12
R24
Y1
C19 C20
R40
++
C18 C21
-
+
+
-
U2A
R39
D26
C5
R36
D1
C17
R41
D25
R57
R42
R8
R6
R12
R5
-
+
+
-
-
+
+
-
R9
Q1
R46
R50
R7
SW5
R54
R56
D20
VR8
R38
SW8
SW7
R37
VR7
D19
R49
R48
D18
VR6
C11
D4
R33
R4
SW1
C10C9
R1
VR5
D17
++
C2
D2
D5
R15
D7
D8
++
C6
D9
D10
++
C7
++
C8
R11
D23
TP1
R14
D3
1
2
3
J1,2
++
C4
R3
C1
SW9
D6
C3 D22
MC68HC11A1FN
STRB/RW
STRA/AS
VRL
VRH
MODA/LIR
MODB/VSTBY
/IRQ
/XIRQ
/RESET
XTAL
EXTAL
VSS
VDD
PE7/AN7
PE6/AN6
PE5/AN5
PE4/AN4
PE3/AN3
PE2/AN2
PE1/AN1
PE0/AN0
PD5/SS
PD4/SCK
PD3/MOSI
PD2/MISO
PD1/TxD
PD0/RxD
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
PA7/PAI/OC1
PA6/OC2/OC1
PA5/OC3/OC1
PA4/OC4/OC1
PA3/OC5/OC1
PA2/IC0
PA1/IC2
PA0/IC3
E
52 PIN PLCC
51
52
3
2
19
18
17
8
7
1
26
50
48
46
44
49
47
45
43
25
24
23
22
21
20
16
15
14
13
12
11
10
9
4
6
35
36
37
38
39
40
41
42
27
28
29
30
31
5
32
34
33
U3
R34
R47
D12
D11
R35
R55
SW6
D24
D21
R22
R17
R31
-
+
+
-
U1A
-
+
+
-
U1
R23
R13
R16
1N4003
1N4003
2
34
1
FADER
-3.7V
10.5mA TYP
22.5mA
-3.7V
SYNC
+15.1V
X
+25VDC
.5m MAX
6mA MAX
6.7mA
+5
+15.1V
+15.1V
MASTER
2Vpp
21mA TYP
8-BIT DAC
CH.8
CH.7
CH.6
CH.5
CH.4
CH.3
CH.2
IN
IN
IN
IN
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
CH.1
ON
ON
ON
ON
ON
ON
ON
ON
ON
NEG. CHARGE PUMP
DISABLE
REMOTE
RESET CIRCUIT
+5 TO uC
4800bps
+5
+5
+5
+5
+5
+5
DATA OUT
FEMALE XLR
4148
470
5818
5818
5818
5818
1N751
100
3
2
1
1N751
2
31
150K470K
22
47U
.1U
680
10K
1K
10K
10K
10K
B50K
B50K
B50K
B50K
B50K
10K
10K
10K
10K
10K
B50K
B50K
B50K
B50K
10.0K10.0K
10.0K
34184
10.0K
10.0K
10.0K
40.2K
34184 34184
34184
4123
.001U
4148
1.0K
10.0K10.0K
10.0K
300K
20K
1M
300K
150K
40.2K
40.2K
10K
40.2K
1M
10K
10K
27K 4003
4003
4003
.015U
47U
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
10K
10K
10K
10K
10K
10K
10K
10K
10K
RED
LM393
4148
4148
47U
47U
47U
47U
758
10V
100
.1UF X 8
10K
10K
10K
10K
5.1V
.1U
.1U
10M
8.0MHz
18P18P
5
67
8
10
9
14
12
13
11
4
2
3
1
1
CHANGED D7-D10 TO 1N5818, R1 FROM 560 TO 470, ADDED D26
4E12-01560
12-12-01
E10S5301E.SCH
ADDED 1N751 ZENER (D25) FROM R7 TO GND TO PROTECT HC11 SUPPLY
D5-00525
ADDED R57 - D22 - D23
3
3
C10-98461
PCB REVSCH REVDCN DESCRIPTIONDATE
WEBSTER, NY 14580-9103
847 HOLT ROAD
G.G.
REMOTE VCA CONTROLLER PCB
DRAWING NO.
SCHEMATIC DIAGRAM
REV.
DATE:
DATE:
OFSHEETSCALE:
APPROVED:
DRAWN:
ASHLY AUDIO INC.
ASHLY
Schematic Diagram: RD-8, RW-8
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3
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