VCM-88
VCM-88E
Eight Channel Matrixing Level Controllers
RD-8 Desktop Remote
RW-8 Wall Mount Remote
Operating Manual
0
-6
-12
-18
-23 +23
ThrSig
∞
Gain (dB)
dBu
ThrSig ThrSig ThrSig ThrSig ThrSig ThrSig
0
+6
+6
-6
-12
-18
-23 +23
+12
+18
dBu
+12
+18
-12
-18
-23 +23
0
-6
dBu
0
+6
+6
-6
+12
-12
+18
-18
-23 +23
dBu
0
-6
+12
-12
+18
-18
-23 +23
dBu
0
+6
+6
-6
-12
-18
-23 +23
+12
+18
dBu
∞
On
+12
+18
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 - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
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 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
9
2
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
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
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.
THIS APPARATUS MUST BE EARTHED
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE 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 QUALIFIED SERVICE PERSONNEL.
WARNING:
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.
3
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
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 control 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-independent VCA channels in a single unit capable of limiting, remote level control, and mixing. When connected to the
Ashly RD-8 (desktop) or RW-8 (wall-mount) remote controller, direct DC control, or Ashly's Protea System Software, the VCM-88(E) controls individual channel and master levels with a range of -75dB to +20dB. Each VCA channel 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 “passthrough” to its output for daisy chaining multiple units together.
The Ashly VCM-88E maintains the features of the
VCM-88 while replacing 1/4" jacks with Euroblock connectors. 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 controller is also available as the RW-8 for wallmounting into a
standard 4-gang electrical box. The RD-8 controls the audio 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 communicate 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 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.
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 VCM88(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 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.
4
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
ThrSig ThrSig ThrSig ThrSig ThrSig ThrSig ThrSig
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 referencing 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 active. 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) attenuates 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 VCM88(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 channel 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 default 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 indicator 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 indicates when the unit is powered on. If the green LED does
not light, check to see if the unit is plugged into a live outlet, 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.
5
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
CAUTION
Risk of Electric
Shock. Do
Not Open
CAUTI ON
RISK OF EL ECTRIC SHOCK
DO NOT OPEN
VCM-88E
Made In USA
5.7 Master Output and Channel Pass Through
The VCM-88(E) can be used as an eight-in/oneout 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 pseudobalanced Master Output along with other channels for final 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 reference 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 touchscreen computer interfaces for a variety of control applications, including the VCM-88(E). AMX and Crestron provide a hardware interface which uses the XLR Data In con-
RS-232
10K CW
Pin 1-9
1210
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 internally 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 settings. 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 another unit is connected to the Slave Data connector.
6
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 control 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.
6.4 6.3
6.1
6.2
5.14 MIDI (VCM-88 only)
MIDI In and MIDI Thru jacks allow complete
implementation of the VCM-88 in a MIDI network. An internal 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 connectors. Control data originates from another unit under
RS-232 or MIDI control. (See fig. 9.5)
∞
Gain (dB)
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 VCM88(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 VCM88(E) channel is muted to approximately -75dB by the internal 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 disabling 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 bottom 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 capability. 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.
7
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
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 minimize ground loop problems. Therefore it is always advantageous 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) balanced connections use the tip as (+) and the ring as (-) signal, 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 unbalanced signal. If a gain stage does follow a signal, or if
externally sourced noise persists, use balanced connectors.
Fig 7.1
Tip (+)
Ring (-)
Sleeve (Gnd)
Tip (+)
Sleeve (Gnd)
Stereo Phone Plug
used for balanced
Mono Phone Plug
used for unbalanced
The VCM-88 and the VCM-88E are factory configured for separate input and output connectors. Used this
way, inputs and outputs can be wired balanced or unbalanced. 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 balanced and 10K ohm unbalanced. If the VCM-88E uses unbalanced inputs, connect the input signal to (+) and connect 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 respectively 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).
Fig 7.2
Fig 7.3
G
-
+
G
-
+
Euroblock
Input
Connections
G
-
+
G
-
+
G
-
+
Unbalanced
Input
G
-
+
Balanced
Input
G
+
Unbalanced
Output
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.
8
Euroblock
Output
Connections
G
-
+
Balanced
Output
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
8. Input and Output Configuration Options:
8.1 Single Connector Insert
To use a mixing console’s single jack insert capabilities with the VCM-88, an internal jumper must be selected to properly configure the input and output connec-
Fig 8.1
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 consoles 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 capability 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 output 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” position to select individual channel pass-through. The VCA
circuit’s output signal is still summed to the Master Output, but is removed from the channel output jack.
8.3 Input/Output Matrixing
Input Matrixing means that an input can be internally routed to one or more additional channel inputs, particularly 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”
O
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 insulated “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, avoiding 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.
9
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
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 controller 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 current 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 connector. To learn more about their integrated control systems, visit their websites at <www.amx.com> and
<www.crestron.com>.
The details of the Standard VCM-88(E) digital format 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 remote 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 protocol, 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-****
VCM-88
(AMX)
J6
21
43
MIDI (1,3)
RS-232 (2,3)
CRESTRON (1,4)
ASHLY (2,4)
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.
To set the data protocol on a VCM-
Fig. 9.2
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 remote control objectives with minimal hardware requirements and allows for custom “low-tech” hardware interfaces. Two wires are used to supply positive and negative
DC voltage to ordinary 10K ohm linear-taper potentiometers, 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 Windows 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 allowing storage of channel and scene settings to disk. The program 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)
10
Fig. 9.3
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>.
D-Sub 9 Pin Female
Fig. 9.4 Fig. 9.5
RS-232 Pin-Out
9876
Pin # RS-232 DCE Name
1
Not Connected
2
Transm itted Data
3
Received Data
4
Dat a Termin al Read y (tied to p in 6)
5
Ground
6
Data Se t Ready (tied to pin 4)
7
Not Connected
8
Not Connected
9
Not Connected
12345
protocol. To use the VCM-88E in a MIDI network, set the
back panel Protocol DIP switch to the MIDI configuration.
(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.
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 products, via their MIDI In/Out jacks, (see pin compatibility
9.5 MIDI Implementation
Both the VCM-88 and the
VCM-88E can be fully implemented in a MIDI system as a
slave unit, that is, able to receive
data without being able to generate new data. On the VCM-88, the
MIDI Thru jack is a buffered reflection of the MIDI input, and is
used to connect to other MIDI devices in the network. On the VCM88E, 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 quality 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 select the MIDI communications
Set the VCM-88 to the desired MIDI Channel
Set the VCM-88E to the desired MIDI Channel by
VCM-88
Internal
Device ID
(MIDI Chann el)
Jumper S elect
* PCB May Say
"Bank Select"
(default)
1
2
3
4
5
6
7
8
0
234
1
9
10
11
12
13
14
15
16
VCM-88E
Back Panel
Device ID
(MIDI Chann el)
DIP Switch Select
(default)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
11
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
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 Software, 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 Continuous 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 compatibility 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
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 protocol is selected to MIDI, that the VCM-88(E) has been selected to the correct device (MIDI Channel), that the correct continuous controller number is being used for the
desired audio channel, and that the controller value is correct.
(MIDI shield - float at input, per MIDI spec)
be fully clockwise at 0dB. Check the RD-8 remote controller -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 distortion 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 input and output connections between the VCM-88(E) and
other components in the system. Also, try to power all components 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 VCM88(E) is not designed to feed microphones directly into the
inputs without a mic preamp first. The VCM-88(E) is essentially a line level unity-gain device, meaning it is designed 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 disable 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 Disable switch out for remote controllability.
If you still have problems, contact your Ashly
dealer or call Ashly direct at (800) 828-6308.
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 remote controller channels switched on? Are the input/output 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
12
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
12.6 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)
12.2 Channel Outputs
Output Type: 1/4" TRS (VCM-88), Euroblock (VCM-88E)
Output Impedance: 200 ohm pseudo-balanced,
Max output level: +22dBu
12.3 Master Output
Output Type: 1/4" TRS (VCM-88), Euroblock (VCM-88E)
Output Impedance: 200 ohm pseudo-balanced
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
100 ohm unbalanced
100 ohm unbalanced
13
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
13. Dimensional Drawings
1.15 (29)
1.25
1.75
(44.5)
0.10 (2.5)
(31.8)
RD-8
Remote
Level
Control
6.00 (152)
17.00 (432)
DiensionalDrainor !CM-88an"!CM-88#inInches$%
emote
e!el
"o$trol
R-8
1.60
0.38
allountController
7.94 (202)
0.79
(20)
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-ofhouse 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.
14
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
100
R84
R85
100
J12
CHANNELS 1-8
SUMMED OUTPUT
EXAMPLE OF DC CONTROL OF CHANNEL 1:
10P5312
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
PCB REVSCH REVDCN DESCRIPTIONDATE
MIDI CONTROL
+5
E
REV.
8-27-2003
OFSHEETSCALE:
DATE:
DATE:
Schematic Diagram: VCM-88
JRD
APPROVED:
DRAWN:
DRAWING NO. 10S5310E
WEBSTER, NY 14580-9103
847 HOLT ROAD
ASHLY AUDIO INC.
8 CHANNEL REMOTE VCA/LIMITER
VCX-80/VCM-88
SCHEMATIC DIAGRAM
ASHLY
J13
C40
.001uF
111287654321109
CONNECTOR FOR DC CTRL
10K LINEAR
CW
C31 C32 C33 C34 C35 C36 C37 C38 C28
C30 C29
J8
x 11
.01uF
MASTER
CARD
RS232
DC CONTROL
C4
220
R17
1
4
2
5
3
MIDI THRU
J5
L4 L5
BEAD BEAD
.001 .001
220
C3
R16
10
U2E
1189
U2D
RxD
VCM-88 ONLY
R15
U1
220
R13
L3
876
BEAD
MIDI IN
HC11 - PIN20
R14
5
6N138
3
2
4148
D27
C2
C1
.001
.001
L2
BEAD
1
4
2
J4
5
3
U5
26
+5V
ALL DIODES 1N4003, ALL UNMARKED RESISTORS 10K
UNLESS OTHERWISE MARKED, ALL RESISTORS 5% 1/4W, ALL CAP VALUES uF,
NOTES:
J8-12
R82
X
-
J8-8
R81
X
R80
-
4560
C26 C27
4.7K
+
47
C42
109
C41
1353617241411
X
SUMMING
JUMP
R83
-4VDC
C43
+15
X
2
7815
$FF=-3.75V=+20dB
U11
13
HEAT SINK
1M10U
+18
R23
+
C11
47UF
16
D26
754
6.8V
C22
X
$00=+5.81V
$FF=-1.45V
Vo
TP3
R71
R72
LEVEL SHIFTER/SCALER
Vo = (-0.727)Vi + 5.81
10.0K
R65
Vi
$00=0V
$FF=9.96V
$CD=8V ON RESET
10.0K
R67
18K
R68
TP4
DAC
+18
.1U
10.0K
R64
C21
R48
R45
R47
PA1/IC2
PA0/IC3
.1U10U
+
R46
TP2
PA2/IC0
PA5/OC3/OC1
PA4/OC4/OC1
PA3/OC5/OC1
VSS
1
C12
300K
8-BIT DAC
R37
1M
SYNC
PA7/PAI/OC1
PA6/OC2/OC1
EXTAL
7
R21
+5V
E
VDD
C13
+5
RESET CIRCUIT
U10B
+
4560
1 OF 8 CHANNELS
U10A
5.33dB/VOLT SCALE
+
-75dB TO +20dB RANGE
BUS
X
C_2
R_19
1K
R_10
1K
R_11
15.8K
R_5
9.76K
R_6
$00=+15.1V=-75dB
U_1B
4560
-
+
R_4
+
C_1
4251121514
13
GCBA
X7X6X5X4X3X2X1
X0
VCC
HC4051
VEE
/EN
3
6
U3
2K
2K
R70
R69
8
U6C
-
+
3418410K
9
10
14
9316.34K
U6D
34184
-
+
12
13
18K
VR2
R73
CW
0dB SHIFT
1
R66
U6A
3418434184
-
+
3
2
10.0K
VR1
MASTER ATTENUATOR
B10K
CW
7
U6B
-
+
5
6
.1U
C20
R55R44
20K
10K
150K470K
JUMP
JUMP
40.2K
10.00K
10.00K IS +/-.1%
300K
150K
40.2K
40.2K
10.00K
10.00K
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
STRB/RW
XTAL
8
+5V
C9
R25
18P18P
X1
10M
8MHz
C10
1M
R12
+
R11
R9
27K
R_14
R_12
19.6K
1K
R_23
33
27P
C_7
891011
7
-18
-18
PC0
STRA/AS
/RESET
17
LM393
U4B
-
D21
CH.1
OUTPUT
VCA
R_7
27P
C_6
+18
37
U_2
R_17
19.6K
R_16
U_3B
-
10.0K
R_15
10.0K
+
C_3
47UF
INPUT
PATCH
P- SHUNT
2-JACK INSERT
J_3
-4VDC
TO DSUB
4125
Q7
PC5
PC4
PC3
PC2
PC1
52 PIN PLCC
MC68HC11A1FN
/XIRQ
18
R24
+5V
D22
4148
4148
R10
47U
U_1A
+5
100
R_9
T
V
R_1
J_4 J_2
O
100
R_8
C_5
+
-18
ADJ
NULL
CW
4560
-
+
None
0
VR_2
6254
R_20
5.6K
2180LC
18
R_21
None
R_22
None
-18
+18
ADJ
SYM
VR_1
None
100
C_8
27P
+
34184
R_18
R_13
10.0K
10.0K
C_4
+
R_3
47UF
100K
R_2
100K
1-JACK INSERT
PINS
INPUT
PATCH
J_1
CH.1
IN/IO
R19
33
33
R20
D25
35mA LIMIT
4148
4125
4148
Q6
D24
-18
R18
751
5.1V
D23
D1
REMOTE
DISABLE
X
R63
X
TIP29C
R62
ON SINK
Q1
2
3
1
R61
C23
Q2
4123
.001
+78VDC
R56
20K
+
C25
D4
100uF
C14
.1uF
D6
L1-8
TP1
65VAC FROM
DATA IN
R27
R26
R31
DATA
12
34
J6
CONFIGURATION
DATA DIS
REM DIS
PC7
PC6
PD5/SS
PE0/AN0
PD4/SCK
PD1/TxD
PD0/RxD
PD3/MOSI
PD2/MISO
MODA/LIR
MODB/VSTBY
/IRQ
3
2
19
R28
R30
X
JUMP
R29
2
MIDI
1
DATA CONFIGURATION
100
PASS-THRU
PATCH OUTPUT PIN
R74
2.4K
+27
C_52
+18
10M
R_38
15K
R_50
C_51
RING=OUT
TIP=INPUT
FOR 1-JACK:
J1
10
R1
D2
SW3R
IN
OUT
1K
22
R57
27V
971
D7
100V
D3
D5
100V
L1-7
51P7106
R35
R33
R36
PE6/AN6
PE5/AN5
PE4/AN4
PE3/AN3
PE2/AN2
PE1/AN1
VRH
51
52
4
3
RS232
G
D_6
4125
Q_4
.1uF
LM393
+
.1uF
+
-.5VDC
D_3
4148
1K
R_36
SIG PRES
2
3
1
UNIVERSAL
-18
33mA I LIMIT
-18
10P
C7
+5
R4
4.7K
BANK SELECT
43210
J7
504846444947454325242322212016151413121110946353637383940414227282930315323433
PE7/AN7
VRL
+5V
2
4
1
3
+27
SIG
PRES
R76
-18
2.4K
7
100K
IN SERIES
R_39
C_50
.1uF
LED CIRCUITS
U_5B
-
-18
R_51
1M
1M
R_37
1.5uF
C_12
ON AT -18dBu
OFF AT -19dBu
SIG PRES
VCM-88 ONLY
R3
3.3K
FEMALE XLR
DATA INPUT
+5
R22
100K
4003
+5
D20
R6
+5
40.2K
1M
R5
D18
+5
2K
R60
+18
REMOTE
R58
330
2
1
CRESTRON
C6
48KHz LPF
Q5
FROM PD5
D19
1 VOLT
THRESH.
-
LM393
U4A
C5
R2
4148
Q3
4125
4123
D30
DATA
GREEN
REM DIS
R59
D29
RED
REMOTE
DISABLE
2
4
1
3
ASHLY
4800bps
R75
2.4K
UNREG.
+18
+18
100K
RELEASE
1.5uF
+
R_26
-23dBU TO +23dBu
WIRE
BLACK
.001U
4123
DATA DISABLE
HC11 PIN 25
1N270
R7
10.0K
+
1M .1U
R8
27K
Q4
+
C8
47U
(PD4)
SW3L
IN
OUT
4
3
(AMX)
R_25
C_11
R_34
68K
1M
1.5uF
LIMIT
+5
D9
+18
D10
J2
LIMIT
4123
R_35
+
+18
R_24
C_10
+
ATTACK
D_1
4148
62K
R_29
20K
R_33
VR_3
THRESH
X
10P5312
7805
1
G
D28
U8
3
7818
1
5
51P7106
S1 SW2
HOT
D_5
YEL
7 LED’S
Q_3
4148
D_4
47K
U_4A
-18
-
34184
Q_1
4123
6.8K
U_3A
-
+
34184
100
R_27
Q_2
4125
D_2
4148
-
34184
15K
R_28
CW
-18
LOG
25K
J14
6789
12345
4003
+
3
C24
1.5U1.5U
2
U9 D8
POWER
D11
+
+
C18
1.5U
2
35V
1000
1000
+
C16+C17
D17
D16
.1U
100V
C15
1011122
3
4
120/240
INOUT
240V120V
L
R
1/2AGC
GROUND
R77
IN SERIES
2.4K
R_32
-18
U_4B
15K
+
1K
R_31
RS-232
D13
C19
3
1
7918
2
35V
U7
D15D14
L1
SW1
NEUT
ACINLET
-18
R_30
10:1RATIO
VCM-88 ONLY
-18
D12
IEC 320
15
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
g
y
C16
47U
SUM
+18
MUX5
MUX6
MUX7
MUX8
G
2
5
C
B
X41X6
X74X5
X312X013X114X2
A
VEE
/EN
6
Mux/EN
2K
(to HC11 pin-31)
U7C
MC34184
9
U7D
0dB Trim
18K
VR2
10K
C5
.1U
U7A
11 4
-18
Master Attenuator
VR1
10K
U7B
R22 10K
R62 40.2K
R65 10.00K
R58 150K
R60 40.2K
R61 40.2K
R63 10.00K
R64 10.00K
35
PB2/A1040PB3/A1139PB4/A1238PB5/A1337PB6/A1436PB7/A15
PA3/OC5/OC131PA7/PAI/OC1
PA4/OC4/OC130PA5/OC3/OC129PA6/OC2/OC1
27
18
28
1
J3
Mux/EN
none
SYNC
+5
1N4148D31N4148
R13
10K
+18
D
DC1
DC2
DC3
DC4
DC1
DC2
DC3
DC4
SUM
MUX1
MUX2
MUX3
MUX4
SigLED4
8
9
10
11
7
Q3
-18
+18
+5
D4
none
J4
Data In
PC0/AD09PC1/AD110PC2/AD211PC3/AD312PC4/AD413PC5/AD514PC6/AD615PC7/AD7
MODA/LIR
IRQ
MODB/VSTBY
PE0/AN043PE1/AN145PE2/AN247PE3/AN349PE4/AN444PE5/AN546PE6/AN648PE7/AN7
VRH
XIRQ/VPP
3
2
19
52
Chan1
Chan0
R16 10K
R15 10K
R14
10K
R53
40.2K
D
E
.1U
C3
3
2
DC6
DC5
5106978
ControlCCW
DCmaster
DC4
DC3
312
411
ControlCW
DC2
DC1
114
213
DIP14 [SOCKET]
MasterOut
R51
HS1
None
+18
-18
C18
none
C17
3
Out
U4
In
1
R9
+18
8
DC7
J6A
(To Daughter Card)
DC8
7654321
Schematic Diagram: VCM-88E, Page 1 of 4
C13
10M
C12
R38
X1 8.00MHZ
R85 10K
R8 10K
R7 10K
R6 10K
R5 10K
R4 10K
+5
R3
10K
R1
27K
/Reset Circuit (5vRail < 4.1v)
E
none
R10
7815
10K
18P
18P
R52
0 OHM
C14
D1
J2
C2
R45
J1
C1
R32
10K
2
47U
1N754A
none
18K
none
.1U
1M
4560
1
4.7K
R11
10K
5
6
4560
7
-4
C6
none
U3
74HC4051
16
6.8V
Vo
$FF=-1.45V
$00=+5.81V
1
R47
7.15K
R44
R43
.1U
DAC
1
R41
10.0K
5
8
E
XTAL
(in socket)
*M68HC711E9*
RST17STRA/AS
EXTAL
U1
7
1
84
U2A
3
U5A
U5B
MUX1
MUX2
VCC
R48
13
10.0K
10.0K
2
R42
6
R39 300K
R33 1M
6
STRB/R/W
4
2
+1.1v
8 4
.1U
C7
MUX3
MUX4
15
3
R50
2K
8
10
14
MC34184
12
R46
1
MC34184
3
10.0K
7
MC34184
5
R59 150K
R66 20K
R57 470K
R40 300K
41
PB0/A842PB1/A9
PA0/IC334PA1/C233PA2/C1
32
NJM2903
D2
10s5320b-3.Sch
Analog Channels 1-4
LimLED4
D34
C49
47U
2N4125
D6
D5
R49
2K
D9
G [T1]
Remote Data
Q1
2N4125
1N4148
R35
1M
C4
1
20
16
21
PD0/RXD
Ptcol0
Chan2
Chan3
R17 10K
R18 10K
R19 10K
7
U2B
5
6
SUM
MUX5
(LEDs in series)
1N4004
R6833R69
1N4148
1N4148
Q2
2N4125
D11
5.1V
1N5231B
C15
47U
Q4
R2
27K
.1U
24
23
PD1/TXD
PD2/MISO22PD3/MOSI
50
Ptcol1
R20 10K
R21 10K
NJM2903
R34
R54
3.16K
DC5
DC6
DC7
DC8
DC5
DC6
DC7
MUX6
MUX7
MUX8
-4
(to RIB2a-12)
33
35mA LIMIT
-18
R23
10K
2N4123
25
PD5/SS
PD4/SCK
GND
1
+5
26
+5
VRL
51
R24
R55
330
1M
(18vRail < 15.1v)
/Low Power Detect
DC8
SigLED4
LimLED4
RXD
10K
D13
C19
10s5320b-4.Sch
Analog Channels 5-6
U8B
R27
10K
+5
R36
1M
5
0.6V
R73
+18
C8
.1U
10U
2
SW3A
3
1
R [T1]
+5
6
74HC08
4
5
D14
D12
R26
10K
7
U6B
4560
6
100K
D7
+5
C9
SW DPDT
Remote Disable
R76
220
C
Daughter Card
10s5320b-2.Sch
1N5818
1N5231B5.1V
R25
1N4148
R72
100K
1
14
.1U
C
1N746A
+18
R74
+5
ConfigA
10K
2
+5
GND
7
3
U8A
74HC08
/DATA OUT
L3
BEAD
J5
DATA
C10
.1U
D15
100K
R29
10K
RD/RS232in
TXD
R75
220
L2
BEAD
65432
-
G
OUT
2.5V
R28
+5
n/c
R56
330
1
R37 1M
U6A
84
4560
3
2
10K
ConfigB
DATAin
RemotePower
R70 1K
R30 10K
876
2
R77
220
L1
BEAD
1
+-+
IN
EUROBLOCK 6
.1U
C11
78
69
510
411
312
213
114
U9
3
D8
1N4148
L4
BEAD
D16
1N746A
(To Daughter Card)
J13A
DIP14 [SOCKET]
23
C24
5
6N138
/DATA IN
C23
.001U
C22
.001U
C21
.001U
C20
.001U
-18
D23
SW3B
.001U
R67
RS232out
1N4004
4
SW DPDT
Q6
TIP29C
1
20K
+78VDC
D19
R81
5
(SINK)
Q5
C40
10
6
2N4123
100U
1N4004
D17
H1
B
Ptcol0
Chan0
Ptcol1
Chan1
Chan2
Chan3
D24
1N4004
-18
R71
1K
22
R80
none
R79
none
R78
D33
1N971B
D20
1N4004
D18
1N4004
BRACKET 4-40
B
11
74HC08
U8D
12
13
8
Unused Gates
74HC08
U8C
9
10
+5
3
1N4004
D22
1
D10
+18
3
1N4004
D21
1
27V
+27
Remote Ground (RG)
1N4004
D25 1N4004
C41
.1U
7
81112
5
ACH2
SW1
SW DPDT
ACH
F1
$VKO\ $XGLR ,QF
C
D32
1N4004
C47
1.5U
Out
2
U12
7805
In
(+5V rail holds for 350ms after18V rail drops to 15V)
C48
470U
G [T1]
Power
D30
1N4004
D31
1N4004
C46
1
C44
D27
out
120V in=240V
SW2
SW DPDT
AC-INLET
1.5U
3
U11
7918
(SINK)
2
1000U 35V
1N4004
D28
10
T1
2
H9
-18
1N4004
Out
D29
In
[XFMR-PCB] P85D07106
BRACKET 4-40
* Connect AC Inlet G to chasis using:
m70b22550 - 22ga green wire,
C45
1.5U
Out
2
U10
7818
(SINK)
In
C43
1000U 35V
D26
1N4004
C42
3
4
out
ACN
F2
FUSE CLIP [3AG]
3AG ½ AMP AGC
LGN
J7
1N4004
.1U
A
B
Rev.
11:31:11
(716) 872-0739
Print Date
6-Jan-2004
10s5320
#
847 Holt Road
Webster, NY 14580-9103
(716) 872-0010
Dan Szaba
Phone: Fax:
Drawn B
A->B @ 157%
14
10s5320b-1.Sch
Sheet # of
B
VCM-88E, 8 Channel Remote VCA / Limiter
Size
APPROVED: Dw
* STAR GROUND
EG AG DG RG
Force connect: Earth, Analog, Digital, & Remote Grounds
HS2
HEAT SINK [3 X TO-220 1.625"]
H5
BRACKET 4-40
H4
BRACKET 4-40
H3
BRACKET 4-40
Front panel PCB mounting hardware
H2
BRACKET 4-40
1 2 3 4 5 6 78
s45w08030 - #6 (small) ring 16ga,
f10b06331 - 6-32 x 5/16" screw,
f30z06301 - #6 split ring washer,
f40z06300 - 6-32 hex nut
A
16
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
g
y
g
A
B
Rev.
11:31:58
(716) 872-0739
Print Date
6-Jan-2004
$VKO\ $XGLR ,QF
C
847 Holt Road
Webster, NY 14580-9103
(716) 872-0010
Dan Szaba
Phone: Fax:
Drawn B
A->B @ 157%
34
10s5320b-3.Sch
Sheet # of
B
Size
A
10s5322
#
Channels 1-4
VCM-88E Analo
APPROVED: Dw
Schematic Diagram: VCM-88E, Page 2 of 4
1 2 3 4 5 6 78
Patch
Output
R420
100
C404
27P
G
65432
OUT
Patch
Output
100
.1U
-18
C304
27P
G
65432
OUT
-18
SIG4
J403
Patch Input
R421
100
EUROBLOCK 6
-18
J303
Patch Input
R321
100
EUROBLOCK 6
B
C405
-18
+18
R429
68K
R428 100K
C413
1.5U
D402
1N4148
D401
R425
62K
THRESHOLD
VR400
25KLOG
-18
20K
R337
+18
R329
68K
R328 100K
C313
1.5U
D302
THRESHOLD
VR300
25KLOG
-18
H340
BRACKET 4-40
B
LimLED4
.1U
R431
1M
C414
C305
1N4148
+18
SigLED3
R339
.1U
C317
+18
C316 .1U
R335
1K
LimLED3
R331
1M
C314
R325
Q403
2N4123
114
3
+18
R430
1.5U
R427
R422 18K
D306
Q304
2N4125
10M
84
3
D305
Q303
2N4123
12
+18
R330
1.5U
R327
1N4148
D301
62K
R322 18K
D404
Y [T1]
47K
R433
1
TLE2064
2
6.8K
RELEASE
6
100
Q401
1
.1U
2
R423 15K
G [T1]
SIG PRES 3
R340
100K
1
NJM2903
2
1M
1N4148
D304
Y [T1]
R333
47K
14
TLE2064
13
6.8K
RELEASE
9
100
Q301
14
1N4148
13
R323 15K
LIMIT 4LIMIT 3
U401A
7
TLE2064
2N4125
U301A
TLE2064
3
R424 1K
(-20 dBu)
U342A
C315
U401D
8
TLE2064
2N4125
U301D
TLE2064
12
R324 1K
D403
C406
Q402
5
C318
R338
R336
1.5U
D303
R332
Q302
10
1N4148
.1U
R432
2N4123
U401B
-18
.1U
C306
11 4
.1U
1M
1N4148
2.7K
2N4123
U401C
-18
R326 15K
RATIO 10:1
LimLED3
+18
2.7K
RATIO 10:1
SigLED2
-18
-18
LimLED2
R426 15K
-18
E
D
VTO
J204
J205
Patch
123
O2
R219
7
TLE2064
U202
5 7
2180LC
19.6K
U101B
TLE2064
5
R211
47U
O2
123
J107 J206
J104
123
O1
R119
1
TLE2064
U102
5 7
2180LC
19.6K
U101C
TLE2064
10
R111
47U
O1
123
Out2
100
R218
47U
U121B
5
-
6
2
4
10.0K
C203
+
1
J201
VTO
Out1
100
R118
47U
U121A
3
-
6
2
4
10.0K
C103
+
1
J101
Output
1
R220
100
10K
R215
5.6K
-18
R228 100K
SIG2
D202
C204
27P
R212
10.0K
R209
100K
R208
100K
G
IN
R225
THRESHOLD
VR200
J203
Patch Input
R221
100
Out2
-
+
G
65432
EUROBLOCK 6
OUT
CH.2
J105
Patch
Output
1
R120
100
10K
C110
.1U
11 4
-18
R115
5.6K
-18
R128 100K
C104
27P
R112
10.0K
R109
100K
R108
100K
G
IN
VR100
J103
Patch Input
R121
100
Out1
-
+
G
65432
EUROBLOCK 6
OUT
LimLED2
C205
-18
R231
+18
R229
68K
C213
1.5U
1N4148
D201
1N4148
62K
25KLOG
-18
SigLED1
C117
+18
20K
R137
R135
LimLED1
R131
+18
R129
68K
C113
1.5U
D102
R125
THRESHOLD
25KLOG
-18
H120
BRACKET 4-40
D
Q203
2N4123
.1U
114
3
1M
+18
R230
C214
1.5U
R227
C105
+18
R222 18K
D106
Q104
2N4125
R139
10M
.1U
84
3
C116 .1U
D105
1K
Q103
2N4123
12
1M
+18
R130
C114
1.5U
R127
1N4148
D101
62K
R122 18K
D204
Y [T1]
47K
R233
1
TLE2064
2
6.8K
RELEASE
6
100
Q201
1
.1U
2
R223 15K
G [T1]
SIG PRES 1
R140
100K
1
NJM2903
2
1M
1N4148
D104
Y [T1]
R133
47K
14
TLE2064
13
6.8K
RELEASE
9
100
Q101
14
1N4148
13
R123 15K
LIMIT 2LIMIT 1
U201A
7
TLE2064
2N4125
U101A
TLE2064
3
R224 1K
(-20 dBu)
U122A
C115
U201D
8
TLE2064
2N4125
U101D
TLE2064
12
R124 1K
D203
1N4148
.1U
C206
Q202
5
C106
.1U
C118
R138
R136
1.5U
D103
1N4148
R132
Q102
10
R232
2N4123
U201B
-18
RATIO 10:1
.1U
11 4
R141
1M
-18
R134
2.7K
2N4123
U201C
-18
R126 15K
RATIO 10:1
LimLED1
+18
2.7K
-18
2.4K
-18
2.4K
R226
15K
-18
-18
J207
HDRM 1X3
8
R217
10K
SUM
C212
27P
C211
19.6K
R216
6
R207
1K
.1U
C208
R2051KR204
DC2
DC2
15.8K
R202
G [T1]
R240
7
NJM2903
1N4148
1K
R1051KR104
DC1
DC1
15.8K
R102
+18
R206
C207 27P
9.76K
SIG PRES 2
(-20 dBu)
100K
U122B
6
R236
1M
1.5U
C215
C111
+18
.1U
.1U
+18
R106
C107 27P
9.76K
33
R213
R210
C202
4
J202
HDRM 1X4
SigLED1
-18-18
R238
1M
R117
SUM
27P
R116
C109
C108
33
R113
R110
C102
4
J102
HDRM 1X4
CH.1
+
3
10.0K
6
10.0K
47U
P21
10K
19.6K
+
3
10.0K
9
10.0K
47U
P21
J106
1 8
R214
7
HDRM 1X3
C112
2
1 8
R114
8
7654321
1K
-3.75V=+20dB
+15.1V=-75dB
8
U121C
R203
TLE2064
9
10
R201
1M
MUX2
C201
10U
MUX2
D206
SigLED2
Q204
2N4125
R239
10M
5
20K
R237
C216 .1U
D205
R235
1K
SIG2
R107
1K
-3.75V=+20dB
+15.1V=-75dB
14
U121D
R103
TLE2064
12
13
R101
1M
MUX1
C101
10U
MUX1
E
C
-3.75V=+20dB
+15.1V=-75dB
8
U341C
TLE2064
9
10
R401
MUX4
MUX4
SigLED4
R439
20K
R437
R435
SIG4
-3.75V=+20dB
+15.1V=-75dB
14
U341D
TLE2064
12
13
R301
MUX3
MUX3
C
VTO
J404
J405
123
R417
R416
3
R410
C402
4
-18-18
1M
R317
R316
3
R310
C302
4
HDRM 1X3
10K
C412
19.6K
6
+
1 8
R414
7
10.0K
6
10.0K
47U
P21
HDRM 1X3
10K
C312
19.6K
2
+
1 8
R314
8
10.0K
9
10.0K
47U
P21
J306
Out4
O4
100
R419
R418
47U
7
U341B
TLE2064
5
U402
-
5 7
6
2
2180LC
4
19.6K
U301B
TLE2064
5
R411
10.0K
R412
47U
C403
O4
123
+
1
J401
J406J307
1X2 FEMALE SHUNT
VTO
J304
123
Out3
O3
R319
100
R318
47U
1
U341A
TLE2064
3
U302
-
5 7
6
2
2180LC
4
19.6K
U301C
TLE2064
10
R311
10.0K
R312
47U
C303
O3
123
+
1
J301
1
10K
R415
5.6K
10.0K
R409
100K
R408
100K
Out4
-
+
G
IN
CH.4
J305
1
R320
10K
C310
11 4
R315
5.6K
10.0K
R309
100K
R308
100K
Out3
-
+
G
IN
J407
SUM
27P
C411
R407
1K
.1U
C408
+18
33
R406
R4051KR404
1K
C407 27P
R413
DC4
DC4
R403
15.8K
R402
9.76K
1M
C401
10U
J402
HDRM 1X4
SIG PRES 4
D406
G [T1]
(-20 dBu)
SigLED3
Q404
2N4125
R440
100K
7
U342B
10M
NJM2903
5
6
R438
R436
1M
C416 .1U
1.5U
D405
C415
1K
1N4148
SUM
27P
C311
+18
.1U
C309
R307
1K
.1U
C308
+18
R306
33
R3051KR304
1K
C307 27P
R313
DC3
DC3
R303
15.8K
R302
9.76K
1M
C301
10U
J302
HDRM 1X4
CH.3
17
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
g
y
g
E
VTO
J605
Patch
Output
J604
R617
10K
R616
+
3
10.0K
6
R610
10.0K
47U
C602
4
P21
-18-18
R517
10K
R516
+
3
10.0K
9
R510
10.0K
47U
C502
4
P21
J506
123
HDRM 1X3
O6
R619
C612
7
19.6K
TLE2064
6
U602
5 7
2180LC
1 8
R614
19.6K
7
TLE2064
5
R611
47U
O6
123
J606
J507
J504
HDRM 1X3
123
O5
R519
C512
1
19.6K
TLE2064
2
U502
5 7
2180LC
1 8
R514
19.6K
8
TLE2064
10
R511
47U
O5
123
Out6
100
5
-
6
U501B
10.0K
J601
Out5
100
3
-
6
U501C
10.0K
J501
R618
47U
U561B
2
4
C603
+
1
R518
47U
U561A
2
4
C503
+
1
1
R620
100
10K
R615
5.6K
-18
SIG6
C604
27P
R612
10.0K
R609
100K
R608
100K
J603
R621
Out6
-
-
+
G
G
65432
IN
OUT
CH.6
T
J505
Patch
Output
1
R520
100
10K
C510
.1U
11 4
-18
R515
5.6K
-18
C504
27P
R512
10.0K
R509
100K
R508
100K
J503
R521
Out5
-
-
+
G
G
65432
IN
OUT
J607
8
SUM
27P
C611
R607
1K
.1U
7654321
-3.75V=+20dB
+15.1V=-75dB
8
U561C
TLE2064
9
10
R601
1M
MUX6
MUX6
SigLED6
R639
20K
R637
C616 .1U
R635
1K
SIG6
Schematic Diagram: VCM-88E, Page 3 of 4
-3.75V=+20dB
+15.1V=-75dB
14
U561D
TLE2064
12
13
R501
1M
MUX5
MUX5
C608
+18
33
R606
R6051KR604
1K
C607 27P
R613
DC6
DC6
R603
15.8K
R602
9.76K
C601
10U
J602
HDRM 1X4
SIG PRES 6
D606
G [T1]
(-20 dBu)
SigLED5
Q604
2N4125
R640
100K
7
U562B
10M
NJM2903
5
6
R638
1M
R636
1M
1.5U
D605
C615
1N4148
SUM
27P
C511
+18
.1U
C509
R507
1K
.1U
C508
+18
R506
33
R5051KR504
1K
C507 27P
R513
DC5
DC5
R503
15.8K
R502
9.76K
C501
10U
J502
HDRM 1X4
CH.5
E
THRESHOLD
Patch Input
100
EUROBLOCK 6
Patch Input
100
EUROBLOCK 6
+18
R628 100K
D602
1N4148
D601
R625
62K
VR600
25KLOG
+18
R528 100K
THRESHOLD
VR500
25KLOG
H560
D
LimLED6
C605
-18
R631
R629
68K
C613
1.5U
1N4148
-18
SigLED5
C517
+18
20K
R537
R535
LimLED5
R531
R529
68K
C513
1.5U
D502
R525
-18
BRACKET 4-40
D
Q603
.1U
114
1M
C614
1.5U
R627
C505
+18
R622 18K
Q504
2N4125
R539
10M
.1U
84
C516 .1U
D505
1K
Q503
1M
C514
1.5U
R527
1N4148
D501
62K
R522 18K
2N4123
R633
3
+18
R630
RELEASE
R623 15K
D506
R540
3
2N4123
R533
12
+18
R530
RELEASE
1N4148
R523 15K
D604
Y [T1]
47K
1
TLE2064
2
6.8K
6
100
Q601
1
.1U
TLE2064
2
R624 1K
G [T1]
SIG PRES 5
100K
1
U562A
NJM2903
2
1M
1N4148
D504
Y [T1]
47K
14
TLE2064
13
6.8K
9
100
Q501
14
TLE2064
13
R524 1K
LIMIT 6LIMIT 5
D603
U601A
C606
7
TLE2064
5
2N4125
U501A
3
(-20 dBu)
C518
1.5U
C515
D503
U601D
8
TLE2064
10
2N4125
U501D
12
1N4148
.1U
Q602
2N4123
U601B
.1U
C506
11 4
.1U
R538
R536
1N4148
R532
Q502
2N4123
U601C
RATIO 10:1
-18
1M
2.7K
-18
R526 15K
LimLED5
+18
R632
2.7K
SigLED4
-18
-18
LimLED4
RATIO 10:1
R626 15K
-18
A
B
Rev.
11:32:28
(716) 872-0739
Print Date
6-Jan-2004
$VKO\ $XGLR ,QF
C
847 Holt Road
Webster, NY 14580-9103
(716) 872-0010
Dan Szaba
Phone: Fax:
Drawn B
A->B @ 157%
44
10s5320b-4.Sch
Sheet # of
B
Size
A
10s5323
#
Channels 5-8
VCM-88E Analo
APPROVED: Dw
1 2 3 4 5 6 78
J805
R820
C804
-
J705
100
.1U
C704
-
Patch
OUT
Patch
OUT
Output
100
27P
G
65432
Output
-18
27P
G
65432
J803
J703
-18
SIG8
Patch Input
R821
100
EUROBLOCK 6
-18
Patch Input
R721
100
EUROBLOCK 6
B
R834
+27
C805
-18
+18
R829
68K
R828 100K
C813
1.5U
D802
1N4148
D801
R825
62K
THRESHOLD
VR800
25KLOG
-18
20K
R737
+18
R729
68K
R728 100K
C713
1.5U
D702
THRESHOLD
VR700
25KLOG
-18
H780
BRACKET 4-40
B
2.4K
.1U
R831
1M
C814
C705
1N4148
+18
SigLED7
R739
.1U
C717
+18
C716 .1U
R735
1K
LimLED7
R731
1M
C714
R725
Q803
2N4123
114
3
+18
R830
1.5U
R827
R822 18K
D706
Q704
2N4125
10M
84
3
D705
Q703
2N4123
12
+18
R730
1.5U
R727
1N4148
D701
62K
R722 18K
D804
Y [T1]
47K
R833
1
TLE2064
2
6.8K
RELEASE
6
100
Q801
1
.1U
2
R823 15K
G [T1]
SIG PRES 7
R740
100K
1
NJM2903
2
1M
1N4148
D704
Y [T1]
R733
47K
14
TLE2064
13
6.8K
RELEASE
9
100
Q701
14
1N4148
13
R723 15K
LIMIT 8LIMIT 7
U801A
7
TLE2064
2N4125
U701A
TLE2064
3
R824 1K
(-20 dBu)
U782A
C715
U801D
8
TLE2064
2N4125
U701D
TLE2064
12
R724 1K
D803
C806
Q802
5
C718
R738
R736
1.5U
D703
R732
Q702
10
LimLED7
1N4148
.1U
R832
2N4123
U801B
-18
.1U
C706
11 4
SigLED6
.1U
1M
-18
1N4148
2.7K
2N4123
U801C
-18
R726 15K
RATIO 10:1
+18
2.7K
RATIO 10:1
-18
-18
LimLED6
R826 15K
C
VTO
J804
R817
R816
R810
C802
4
-18-18
R717
R716
R710
C702
4
HDRM 1X3
10K
19.6K
+
3
10.0K
6
10.0K
47U
P21
HDRM 1X3
10K
19.6K
+
3
10.0K
9
10.0K
47U
P21
J706
C812
6
1 8
R814
7
C712
2
1 8
R714
8
123
O8
R819
7
TLE2064
U802
5 7
2180LC
19.6K
TLE2064
5
R811
47U
O8
123
J707 J806
J704
123
O7
R719
1
TLE2064
U702
5 7
2180LC
19.6K
TLE2064
10
R711
47U
O7
123
Out8
100
5
-
6
U701B
10.0K
J801
Out7
100
3
-
6
U701C
10.0K
J701
R818
47U
U781B
2
C803
+
1
R718
47U
U781A
2
C703
+
1
1
10K
R815
5.6K
4
R812
10.0K
R809
100K
R808
100K
Out8
-
+
G
IN
CH.8
T
1
R720
10K
C710
11 4
R715
5.6K
4
R712
10.0K
R709
100K
R708
100K
Out7
-
+
G
IN
J807
SUM
27P
C811
R807
1K
.1U
C808
+18
33
R806
R8051KR804
1K
C807 27P
-3.75V=+20dB
+15.1V=-75dB
8
U781C
TLE2064
9
10
R801
1M
MUX8
MUX8
R841
2.4K
+27
R839
20K
R837
C816 .1U
R835
1K
SIG8
-3.75V=+20dB
+15.1V=-75dB
14
U781D
TLE2064
12
13
R701
1M
MUX7
MUX7
R813
DC8
DC8
R803
15.8K
R802
9.76K
C801
10U
J802
HDRM 1X4
SIG PRES 8
D806
G [T1]
(-20 dBu)
SigLED7
Q804
2N4125
R840
100K
7
U782B
10M
NJM2903
5
6
R838
1M
R836
1M
1.5U
D805
C815
1N4148
SUM
27P
C711
+18
.1U
C709
R707
1K
.1U
C708
+18
R706
33
R7051KR704
1K
C707 27P
R713
DC7
DC7
R703
15.8K
R702
9.76K
C701
10U
J702
HDRM 1X4
CH.7
C
18
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
A
B
Rev.
11:31:35
(716) 872-0739
6-Jan-2004
Date
10s5321
Webster, NY 14580-9103
(716) 872-0010
Dan Szaba
Phone: Fax:
Drawn By
24
10s5320b-2.Sch
Sheet # of
A
VCM-88E Daughter Card
Size
APPROVED: Dwg #
DC7
DC8
DCmaster
Control CCW
Aux Ground
Control CW
J9
EUROBLOCK 3
B
1
2
3
4
5
6
DC CONTROL B
J12
EUROBLOCK 6
$VKO\ $XGLR ,QF
C
847 Holt Road
C30 .001U
C31 .001U
C32 .001U
C
C33 .001U
C34 .001U
78
69
510
411
312
213
114
J6B DIP14 [SOCKET]
C35 .001U
R83
H8
BRACKET 4-40
C36 .001U
C37 .001U
R84
100
100
+
C38 .001U
C39 .001U
3
G
-
2
1
D
5
6
DC6
5
DC5
4
DC4
3
DC3
2
4321
J11
EUROBLOCK 6
DC CONTROL A
DC2
1
DC1
C28 .001U
C29 .001U
MASTER OUTPUT
H7
BRACKET 4-40
RS-232
J10
DSUB 9F
J8
EUROBLOCK 3
REMOTE
CONFIG SWITCH
X1X
5
9
4
8
3
7
2
6
1
C25
1
2
3
.001U
Data
.001U
C27
L7
BEAD
C26
.001U
L6
BEAD
R31
10K
R82
L5
BEAD
2.4K
RemoteGround
RemotePower
ConfigA
2
SW4A
3
RD/RS232in
SW DPDT
1
TXD
DATAin
ConfigB
78
69
510
411
312
213
114
5
SW4B
SW DPDT
6
4
RS232out
J13BDIP14 [SOCKET]
Ptcol0
Chan0
Ptcol1
Chan1
Chan2
Chan3
00 = RD/RW-8/AMX/Crestron
01 = Protea System Software
10 = MIDI
11 = Legacy (Original VCX-80/AMX)
SW6
SW DIP2
PROTOCOLDEVICE ID
SW5
SW DIP4
2
1
4
3
2
1
3
4
5
6
7
8
Schematic Diagram: VCM-88E, Page 4 of 4
H6
BRACKET 4-40
1 2 3 45
D
C
B
A
19
Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
3
10K
R50
R43
CH.1
10K
6.7mA
1
VR1
OUT
IN
2
B50K
ON
SW1
GRN
D13
R51
R44
10K
10K
VR2
CH.2
B50K
OUT
IN
ON
+5
10K
E
U3
VDD
26
+5
21mA TYP
SW2
D14
GRN
PA1/IC2
PA0/IC3
.1U
++
47U
10K
R52
R45
.015U
C5
R41
PA2/IC0
PA3/OC5/OC1
VSS
1
C18 C21
PA4/OC4/OC1
CH.3
VR3
B50K
R53
10K
SW3
OUT
IN
ON
D15
GRN
2Vpp
4800bps
DATA OUT
FEMALE XLR
D6
4003
100
+15.1V
R57
R5
10.0K
R12
+5
R6
40.2K
R15
10.0K10.0K
-++
-
R16
9
10.0K
U1A
-
-
R23
1.0K
13
R17
20K
150K470K
300K
R24
8-BIT DAC
1M
300K
PB1
PB0
PA7/PAI/OC1
PA6/OC2/OC1
PA5/OC3/OC1
XTAL
EXTAL
8
7
R40
10M
+5
RESET CIRCUIT
100
R14
D5
6
8
10K
150K
PB2
C19 C20
R34
10K
10K
R46
7
-++
-
34184
10.0K
10
R13
14
+
+
34184 34184
12
40.2K
40.2K
40.2K
PB4
PB3
+5
18P18P
8.0MHz
R32
10K
27K 4003
PB5
1M
CH.4
4003
2
5
U1
10.0K10.0K
PB6
R39
Y1
VR4
OUT
IN
ON
3
10.0K
PB7
B50K
SW4
GRN
D1
1
J1,2
R8
R22
R31
10K
R35
R54
D16
10.0K
C6
++
47U
47U
TP1
STRB/RW
STRA/AS
/RESET
17
LM393
R47
D2
4148
D7
++
C7
SYNC
PC1
PC0
MC68HC11A1FN
1
U2A
-++
-
CH.5
VR5
B50K
R55
10K
10K
SW5
OUT
IN
ON
D17
GRN
D24
RED
REMOTE
DISABLE
X
R11
-3.7V
5818
5818
D9
++
47U
5818
C8
NEG. CHARGE PUMP
+5
R42
10K
PC7
PC6
PC5
PC4
PC3
PC2
52 PIN PLCC
/IRQ
/XIRQ
19
18
+5
D11
4148
D12
4148
R33
10K
10K
R48
D8
PD1/TxD
PD0/RxD
CH.6
10K
OUT
IN
22.5mA
5818
D10
PD4/SCK
PD3/MOSI
PD2/MISO
2
VR6
B50K
R37
SW6
ON
D18
GRN
PD5/SS
PE1/AN1
PE0/AN0
MODA/LIR
MODB/VSTBY
3
R36
10K
10K
10K
R49
PE4/AN4
PE3/AN3
PE2/AN2
VRH
52
CH.7
PE5/AN5
C17
.1U
VR7
B50K
SW7
OUT
IN
ON
GRN
504846444947454325242322212016151413121110946353637383940414227282930315323433
PE7/AN7
PE6/AN6
VRL
51
R38
D19
+25VDC
10K
10K
R56
R1
FADER
C16C15C14C13
C12
.1UF X 8
C11
C10C9
CH.8
470
34
VR8
OUT
IN
B50K
ON
SW8
GRN
D26
4148
1
+15.1V
4
34184
+
+
3
1N4003
D22
10K
R10
3
D20
1K
R4
6mA MAX
D3
.5m MAX
758
10V
++
C4
+15.1V
47U
C3
.1U
2
1
ADDED R57 - D22 - D23
3
PCB REVSCH REVDCN DESCRIPTIONDATE
C10-98461
D23
1N4003
-3.7V
11
-
-
2
R9
1
++
OUT
IN
10K
47U
C2
B50K
2
VR9
SW9
MASTER
R3
680
Q1
4123
ON
D21
GRN
C1
.001U
D4
5.1V
1N751
10.5mA TYP
R7
22
+5 TO uC
D25
1N751
E10S5301E.SCH
REV.
12-12-01
OFSHEETSCALE:
DATE:
DATE:
Schematic Diagram: RD-8, RW-8
G.G.
APPROVED:
DRAWN:
DRAWING NO.
CHANGED D7-D10 TO 1N5818, R1 FROM 560 TO 470, ADDED D26
ADDED 1N751 ZENER (D25) FROM R7 TO GND TO PROTECT HC11 SUPPLY
WEBSTER, NY 14580-9103
847 HOLT ROAD
3
D5-00525
4E12-01560
ASHLY AUDIO INC.
ASHLY
SCHEMATIC DIAGRAM
REMOTE VCA CONTROLLER PCB
20
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
Printed in USA 0204
Loading...