CONTENTS
INTRODUCTION 1
UNPACKING 1
VISUAL INSPECTION 1
SPECIFIC POINTS 1
IMPORTANT SAFETY INSTRUCTIONS 3
POWERING 4
TECHNICAL SPECIFICATION 6
EQUALISATION CURVES 9
BLOCK DIAGRAM 10
CONNECTOR PANEL 11
CONNECTIONS 12
INPUT MODULE 14
OUTPUT MODULE 16
ADJUSTMENT & CALIBRATION 18
AD100-015 POWER SUPPLY UNIT 20
CUSTOMER NOTES AND FACTORY MODIFICATIONS 21
TECHNICAL LIBRARY 22
INTRODUCTION
Unpacking
If there are any signs of damage to the outside of the carton, please notify us or your
supplier immediately, regardless of the unit's apparent physical condition. This is in
case a claim has to be made at a later date because of previously undetected transit
damage. The packaging material should not be discarded until the mixer has been
acceptance tested and a suitable transit/storage case is available for secure, safe
storage.
Visual Inspection
Identification - please make a separate note of the serial number for your own capital
equipment records. Ensure that it agrees with the number on the invoice/packing
note. The serial number label is on the back cover, adjacent to the battery
compartment.
Temperature - check the meter glasses for condensation. If the package has been
in transit during cold weather, leave the mixer for at least 12 hours to allow it to return
to normal room temperature. Any measurements or subjective tests then made, will
be to a known temperature reference.
Specific Points
Battery compartment - the mixer has an integral battery compartment to accept
6size-AA cells, and is built into the transversal extrusion.
DC-DC converter - is mounted on the right hand module. Care must be taken when
removing the module, because some wire looms connect from the module to the
base boards.
In order to facilitate the testing and calibration of all modules, a set of two extender
modules is available from the factory.
Connectors - for convenience, the connector panel is labelled for reading from
above. All connectors are in line with their corresponding module.
1
Fuse - to protect the mixer and internal power supply is mounted on the power
supply/converter board. Access is gained by removing the DC-DC converter module.
A resettable polyfuse is fitted; therefore maintenance should not normally be
required. The fuse resets after removal of the fault causing the overload.
Limiter threshold - is set at the factory at +8dBu (PPM 6), but an internal preset
potentiometer allows adjustment to any other level above 0dBu. The limiters are to
be found on the output module printed circuit board.
Microphone powering - the mixer will remain unconditionally stable if the powering on
unterminated input channels is switched off - this also improves the noise
performance and crosstalk. Powering - 48V phantom may be selected before or
after the microphone is connected to the module.
Module fix screws - Hexagon head screws are used to fix the modules and back
cover. The size is 1.5mm HEX A/F with a 2.5M thread. If it becomes necessary to
remove modules or back cover it is strongly advised using a good quality hexagonal
head driver. Use of a screwdriver, however desperate, is not recommended.
We wish you many trouble- free hours of use from your mixer. As a company, we are
fully committed to BS EN ISO 9001. Should you have any problem or require any
further information on mixers or the M-S microphone technique, please do not
hesitate to contact us on 01543 375351 or by fax on 01543 361051.
2
WARNING
IMPORTANT SAFETY INSTRUCTIONS
The user of electrical products must be familiar with their potential dangers, and
fundamental precautions must always be taken. Please read the following text
carefully.
Power supply units manufactured by Audio Developments Ltd are not user
serviceable. There are no user-serviceable parts associated with any such power
supply unit.
THE OUTER COVERS MUST NOT BE REMOVED
Such a power supply unit is solely for use with audio mixers and sound processors hereafter called the equipment - manufactured by Audio Developments Ltd.
Always use a cord set accepted by a National Approved Body.
EARTHING/GROUNDING: When using an external power supply unit that is
connected to the mains supply to drive the mixer it must be CONNECTED TO
EARTH.
In certain types of malfunction or breakdown, earthing provides a path of least
resistance for electric current and considerably reduces the risk of electric shock.
DANGER: Incorrect connection of the equipment grounding/earthing conductor can
result in the risk of electric shock. Where possible obtain a pre-wired mains lead
from a reputable supplier with the correctly fitted mains connector for the type of
mains outlet in use; otherwise, one correctly wired and checked by a qualified
electrical engineer. If your mains lead is not suitable for the mains outlet, have the
correct plug fitted by qualified personnel.
The MAINS PLUG of this equipment is the primary disconnect device. Therefore, in
the final application, ensure it remains close to the equipment and easily accessible.
3
POWERING
The mixer may be powered from either internal cells or an external DC power source.
The integral battery compartment requires a total of 6 size-AA cells. Access is
gained via a captive lid which is retained by one 90-degree-turn buckle. The lid
hinges outwards from the bottom panel. When installing new cells please ensure
they are inserted with the correct polarity rotation.
Either conventional dry or rechargeable nickel-cadmium cells may be used.
However, no recharge facility for ni-cads exists within the mixer. This must be carried
out externally.
When driving the mixer from an external power source, PIN 1 is the 0V connection
and a voltage in the range +9V to +15V DC should be supplied to PIN 4. The power
source should be capable of delivering approximately 400mA - allowing some
capacity for phantom powering.
If an external power supply unit (PSU) is to drive the mixer, a current capability of at
least 400mA is required. It is poor practice to run a PSU at its limit; therefore we
recommend a minimum of 600mA.
Audio Developments AD100-15 PSU is a suitable unit.
WARNING: When NOT using the PSU (AD100-15) supplied for the mixer, ensure
your 4-pin XLR is correctly wired to match the POWER IN connector. Failure to do
so may result in the breakdown of the internal DC-DC converter. Make this check
even if using a PSU which may have been supplied to you in the past, eg AD100-06.
4
THIS PAGE IS BLANK
5
TECHNICAL SPECIFICATION - ELECTRICAL
REFERENCE 0dB=775mV at 1kHz unless otherwise stated.
MAX GAIN (Mic/Line Module) MIC 70dB LINE 40dB
(Line Module) LINE 6dB
MAX INPUT LEVEL MIC @ Max Gain -44dBu @ Min Gain + 6dBu
LINE @ Max Gain -14dBu @ Min Gain +26dBu
LINE MODULE +20dBu
STEREO-RETURN +18dBu
INPUT IMPEDANCE MIC >2k5R
LINE >6k5R
STEREO-RETURN >100kR
MIC POWERING 48V PHANTOM
MAX OUTPUT +23dBm L-R TRANSFORMER BAL
+18dBm H’PHONE MONITOR UNBAL
OUTPUT IMPEDANCE <60R L-R
<20R MONITOR
FREQUENCY RESPONSE 0: -1dB L-R
0: -1.5dB MONITOR PATHS
HARMONIC DISTORTION <0.05% @ 1kHz @ 0dBm OUTPUT
<0.15% @ 40Hz to 15kHz @ +15dBm OUTPUT
OVERLOAD INDICATOR ILLUMINATES @ +15dBu at PRE-FADER POINT
CROSSTALK <-70dB 40Hz to 15kHz
INTERGROUP & INTERCHANNEL
NOISE MIC <-126dB EIN 20Hz to 20kHz;
200R SOURCE
LINE <77dB SNR 20Hz to 20kHz 0dBu IN & OUT
EQUALISATION HF: ±10dB @ 10kHz
LF: ±10dB @ 100Hz
MF: ±15dB
CENTRE FREQUENCY 2k5Hz Q=1.2
HPF: PRE-TRANSFORMER 12dB/OCTAVE
-3dB @ 150Hz -3dB @ 90Hz
6
OUTPUT LIMITER THRESHOLD +8dB
RATIO 7:1
ATTACK 4mS
RELEASE 250mS
CURRENT CONSUMPTION 130mA (4 INPUT) 12V DC SUPPLY
7
TECHNICAL SPECIFICATION - MECHANICAL
SIZE
ALL DIMENSIONS IN MILLIMETRES
WEIGHT 2.3 Kg (Excluding batteries)
8
20
15
10
EQUALISATION CURVES
AD 114 HIGH AND LOW EQ
5
0
dB
-5
-10
-15
-20
10 100 1000 10000 100000
FREQUENCY
LF BOOST
LF CUT
HF BOOST
HF CUT
AD 114 MID EQ AND HPF
20
15
10
5
0
dB
-5
-10
-15
-20
10 100 1000 10000 100000
FREQUENCY
9
BLOCK DIAGRAM
10
CONNECTOR PANEL
(3)
RETMULTIWAY
(4)
(1)
(5)
(1) Stereo output XLRs (L & R)
(2) Mic/Line input XLRs
(3) External DC power input
(4) Stereo-return jack
(5) Subsidiary connector
(2)
4 L R
AD 114
21 3
11
All input and output impedances and levels are to be found in the TECHNICAL
SPECIFICATION.
All inputs to, and outputs from AD114 are to be found on the connector panel except
for the monitor output, which is mounted on the bottom panel facing the operator.
Module connector (2) accepts balanced microphones and balanced line-level inputs.
XLR (input & output) Pin 1 Shield
Pin 2 Signal +
Pin 3 Signal –
In the case of unbalanced line-inputs and outputs, pins 1 & 3 should be connected.
This will not lead to a loss of level.
Main stereo (1) outputs are transformer balanced, and are at line-level.
The stereo tape-return enters the mixer on a standard, ‘A’ type stereo jack (4); left
and right. Each input is unbalanced.
Unbalanced headphone monitor output appears on an ‘A’ type stereo jack. This
output is capable of driving 25R at 0dBu.
STEREO UNBALANCED JACK
Tip Left signal
Ring Right signal
Sleeve Shield
The 15-pin D connector, Multiway (5), carries output and return signals to and from
external devise within one cable.
NORMAL
Pin 1 Chassis Pin 8 Chassis
Pin 2 Channel 1 output Pin 9 Output Left +
Pin 3 Channel 2 output Pin 10 Output Left Pin 4 Channel 3 output Pin 11 Output Right +
Pin 5 Channel 4 output Pin 12 Output Right -
Pin 6 Spare Pin 13 Return Left
Pin 7 Spare Pin 14 Return Right
Pin 15 Spare
12
A three-position rocker switch BATT/EXT selects either internal batteries or an
external DC source. Power to the mixer is confirmed by the MIX ON LED on the
power module.
External powering of the mixer is via a 4-pin XLR (3).
XLR Pin 1 OV Pin 3 NC
Pin 2 NC Pin 4 9V - 15V DC
A suitable external power supply is Audio Developments’ AD100-15, but any external
DC source must be capable of delivering 600mA at 12V.
13
MICROPHONE/LINE INPUT MODULE
(1) Microphone power
(2) Microphone/Line select
(3) Input-gain control
(4) Phase change
∅
∅
OFF
150
90
(5) High-pass filter
EQ
IN
OFF
48V PH
MIC
LN
20
30
40
50
60
70
1
2
- +
HF
(11) High-frequency control
- +
MF
(12) Mid-frequency control
(6) EQ Selector
(7) Routeing Select
(8) Pre-fade listen
(9) PFL indicator LED
(10) Overload indicator
- +
L LF
R
PFL
OL
(13) Low-frequency control
0
5
10
15
20
30
(14) Channel fader
40
50
∞
14
The Microphone/Line input module functions are as follows: Switch (1) selects 48V
phantom power for condenser microphones. Powering may be selected before or
after connecting the microphone, but switch off all powering on unterminated
modules to ensure unconditional stability of the mixer. For complete safety of
external equipment, switch off microphone power before connecting a line-level
signal.
Phase change (4) is pre transformer and operates on microphone and line inputs.
∅1 is the normal position.
The high-pass filter is pre transformer and, similarly, operates on microphone and
line inputs. In this position the filter protects the transformer from low-frequency
saturation caused by wind, traffic, air conditioning etc. Operating frequencies are to
be found in the TECHNICAL SPECIFICATION. The high-pass filter operates
independently of the equaliser.
The input gain of the microphone amplifier is set by the 6-position switch (3). The
range of this control is 50dB in 10dB steps. For line-level signals, an input attenuator
is inserted via switch (2).
Following the microphone amplifier is the simple, but effective, equaliser as used in
the AD245 - selector switch (6). Amplitude controls are HF (11) MF (12) and LF
(13).
Two push-button switches - (7) routes the module’s signal proportionately between
the left and right mix busses.
Pre-fader listen (8) with its LED indicator (9) routes the module’s signal to the
monitor/PFL mix buss for auditioning on headphones.
An overload LED (10) illuminates 3dB before clipping at the input to the fader.
The Penny & Giles fader (14) is calibrated at the fully open position. Faders on
adjacent modules can be coupled for stereo operation by the use of standard
ganging clips.
Line input module - The facilities incorporated in this module are identical to that of
the Microphone/Line module except there is no microphone powering, no
microphone/line select and input switched gain control. The latter is replaced by a
rotary potentiometer with a gain variation range of +/- 6dB
15
OUTPUT MODULE
(1) Meter
(11) Meter Illumination
(3) Slate
(4) Internal microphone
(5) Line-up tone
(6) Limiter link
(7) Output limiters
(8) Limiter LEDs
(9) Output fader
(12) Microphone level
(13) Return level control
(14) Monitor return select
(15) Monitor left
Matrix
(16) Monitor right
(17) Monitor level control
16
This module controls the level of main and monitor output signals and metering of
the output signals. Calibration is achieved when the stereo output level control (9) is
at maximum.
(1) Meter reads left output, right output and PFL level.
Battery status is read on the meter and the meters may be illuminated by ILL (11) overuse of this function will rapidly drain the batteries. When the internal voltage
drops below a safe operating level the battery status reading is at the lower limit of
the BATT mark.
The main output signal is metered and monitored after the output level control and
limiters.
A pair of limiters may be switched in to the main output - LIM (7) - and linked for
stereo operation - LINK (6). LEDs (8) indicate when limiting is taking place. The
factory setting for onset of limiting is +8dBu at the main outputs. Refer to
Adjustments and Calibrations section of this manual, if a different setting is required.
Line-up tone, when selected (5), replaces the normal signals on the main output.
Line-up tone is calibrated on the (BBC-scaled) meters to PPM4, giving a line output
level of 0dBu with the output faders set to maximum. On a VU scaled meter the
calibration is OVU giving a line output level of +4dBu.
The remaining controls are associated with headphone-monitoring of signals from
the mixer - internal signals (DIR) or tape-return (RET) maybe selected (14): these
signals may be either in the L-R domain or the M-S domain. When switches (14),
(15), and (16) remain unselected the main-output signal from the mixer appears on
the headphones. If SW (15) is selected, the left-output signal appears on both
earpieces; if SW (16) is selected, the right-output signal appears on both earpieces.
If switched (15) + (16) are selected, a matrix amplifier is inserted across the monitor
output: when the main output is in the L-R domain, the matrix will enable mono
compatibility to be assessed on the left earpiece and out of phase components to be
checked on the right earpiece. When working entirely in the M-S domain, the matrix
will transform the mixer output into the L-R domain for monitoring purposes.
Selection of RET (14) will allow these functions to be performed on a tape-return
signal. The level of the monitor signal is controlled by potentiometer (17). The level of
the return signal is controlled by a present potentiometer (13). This allows for
calibration of the return signal. For an OdBu signal, the system is calibrated when the
preset is fully counter-clockwise. From that point 20dB gain is available for lower
level signals.
The signal from the internal microphone (4) allows the mixer operator to add a voice
signal to the main output by operating the switch marked SLATE (3). The level is
controlled and set by preset potentiometer (12).
17
ADJUSTMENTS AND CALIBRATIONS
Line-up-tone oscillator - the preset (VR3) that adjusts its level at the output of the
mixer is mounted on the output module printed circuit board.
Meter Calibration
The meter has only one calibration preset potentiometer per indicator bar; which
controls the adjustment of the level of the reading in relationship to the signal being
measured. All other aspects of the meter specification are taken care of within the
software and fixed values in the circuitry.
To gain access to the meter module the top panel holding the meter must be
detached from the main chassis. (Refer to Disassemble and Assemble Instuctions).
When the top panel has been detached from the chassis access can be gained to
the meter module by extending the ribbon cable connecting the meter module to the
main circuit board.
To adjust the meter calibration level apply a signal to an input and obtain the desired
calibration signal level from both outputs. Measurement can be made by applying a
millivolt meter or similar measuring device across pins 2 & 3 of the XLR associated
with the output under test. Adjust the associated preset potentiometer corresponding
to the output being measured to obtain the desired meter reading. (See diagram
below). Factory setting is a '0' reading on a PPM scale corresponds to 0dBu at the
output and to +4dBu at the output on a VU scale unless prior instuctions were
received at the time of ordering.
Left
Right
ILL
PPM/VU ON=VU
IC 1
N/A
18
Main-output limiters - calibration involves two presets per output.
Using the 'L' output as the example …
Biasing and threshold are adjusted as follows: VR5 biases the limiter circuit to the
point of correct operation and VR4 sets the threshold. (Labelled SET 0 and THR
respectively.)
With no signal present, VR5 should be adjusted to give a reading in the
range -1.5V to -2.5V at PIN 14 of IC 2. VR4 should be adjusted to give a reading in
the range -2.5V to -3.5V at PIN 10 of IC2.
Apply a signal at 1kHz to the mixer to give a level of 0dBu at 'L' output. Then select
the limiter function and adjust VR5 until the output signal starts to fall (typically
0.2dB). The DC voltage at PIN 14 of IC 2 should be approximately -2.0V.
After setting VR5, adjust the output signal to just greater than +8dBu with the limiter
deselected. Introduce the limiter and adjust VR4 until the output signal falls to
+8dBu. This is the THRESHOLD setting. (If a different threshold setting is required,
alter the signal levels accordingly.) The DC voltage at PIN 10 of IC 2 should be
approximately 0.6V different from that at PIN 14.
The right output can be set using the above procedure, but the preset and IC
numbers change to correspond with the output being calibrated.
The link function has no individual setting of its own. To ensure this works within
specification it is important that L and R outputs are set up as a pair. After following
the above procedure, the DC voltages at PINS 14 and PINS 10 of the ICs
should be identical. (Tolerance ±0.1V with typical figures at PIN 10 of -2.6V and
PIN 14 of -2.0V)
19
POWER SUPPLY UNIT
TYPE AD100-015
The AD100-015 mains POWER SUPPLY UNIT is suitable for driving most of
AUDIO DEVELOPMENTS’ range of portable audio mixers. This PSU is a single-rail
device providing 1A of current at +14V DC potential and is used as a substitute for
battery power with mixers containing an internal DC-DC converter.
The AD100-015 may be powered from either a 110/120V AC source or a 220v/240V
AC source. Operating the equipment at the wrong voltage could be hazardous.
Care must be taken to connect the LIVE, NEUTRAL and EARTH pins of the PSU’s
IEC mains connector to the corresponding terminals associated with the AC source.
The green LED illuminates when the PSU is operational.
FOR SAFETY REASONS, AD100-015 POWER SUPPLY UNIT MUST BE
CONNECTED TO MAINS EARTH. Any maintenance to the PSU or its mains cable
assembly should be performed by a qualified engineer.
For continued safety the specified fuse link must be fitted in the mains fuse holder
when a replacement is required. Ensure it is of a type approved by a National
Approved Body.
DC-OUTPUT XLR PIN 1 OV PIN 3 NOT CONNECTED
PIN 2 CHARGE PIN 4 +14V DC
DO NOT REMOVE THE OUTER COVERS
NOTE: The power supply unit should be serviced by a suitably qualified engineer.
Only genuine spare parts with identical specification must be used.
It is DANGEROUS to change the specification or modify the product in any way.
20
CUSTOMER NOTES AND FACTORY MODIFICATION
21
TECHNICAL LIBRARY
22
MIC/LINE PARTS LIST
Item Part Number Qnty CAD Part Ref. Ref. Designator
1 74-130-001 1 AMP-064V IC2
2 74-120-010 1 AMP-393V IC5
3 74-920-001 1 AMP-MIC AMP-MIC/1
4 18-001-256 6 CAPCER100ND C35, C36, C37, C38,
C39, C40
5 18-001-321 1 CAPCERU#47P C28
6 18-015-507 3 CAPELEC1.0G1 C3, C4, C25
7 18-015-411 2 CAPELEC4.7E1 C15, C16
8 18-013-022 1 CAPELEC102B1 C8
9 18-045-019 2 CAPPES470N-H C2, C32
10 18-001-241 2 CCU#2N2 C43, C44
11 18-001-227 1 CCU#150P C21
12 18-010-808 1 CEA4.7-100 C27
13 18-010-114 1 CEA47-10 C41
14 18-010-217 2 CEA150-16 C24, C26
15 18-013-316 1 CER100-25 C5
16 18-013-219 4 CER330-16 C30, C31, C33, C34
17 1 CONSWIR 101
18 18-045-007 1 CPE4N7-63 C22
19 18-045-013 1 CPE47N-63 C20
20 18-045-108 1 CPES#6N8 C19
21 27-023-002 1 DIN16MRA CON1
22 72-010-001 2 DIO-1N4148 D1, D2
23 22-505-102 2 IND-U0.4#220U L1, L2
24 40-115-001 2 LED-5MM#RED LED1, LED2
25 27-025-063 1 MOL3PIN CON2
26 72-022-001 1 PNP-BC559B TR5
27 1 POTFAD2#VR4 FADER
28 3 POTMOL#50KLN VR1, VR2, VR3
29 82-126-003 3 PUS204 S7, S8, S9
30 70-031-036 2 RESM1/8#33 L3, R24
31 70-031-048 1 RESM1/8#100 R25
32 70-031-060 1 RESM1/8#330 R26
33 70-031-040 6 RESM1/8#47R R42, R46, R59, R60,
R61, R64
34 70-031-056 1 RESM1/8#220R R6
35 70-031-073 1 RESM1/8#1K1 R27
36 70-031-076 1 RESM1/8#1K5 R38
37 70-031-078 1 RESM1/8#1K8 R37
38 70-031-079 1 RESM1/8#2K R39
39 70-031-084 2 RESM1/8#3K3 R5, R7
40 70-031-086 1 RESM1/8#3K9 R28
41 70-031-092 4 RESM1/8#6K8 R1, R8, R53, R62
42 70-031-096 2 RESM1/8#10K R31, R65
43 70-031-104 8 RESM1/8#22K R10, R11, R12, R29,
23
R55, R57, R58, R63
44 70-031-108 1 RESM1/8#33K R48
45 70-031-112 4 RESM1/8#47K R43, R45, R66, R67
46 70-031-120 6 RESM1/8#100K R34, R36, R44, R47,
R49, R51
47 70-031-132 1 RESM1/8#330K R40
48 70-031-136 1 RESM1/8#470K R41
49 82-257-801 1 ROT1061 SW5
50 81-217-502 4 TOG06 S1, S2, S4, S6
51 81-227-502 1 TOG08 S3
52 86-010-101 1 TXA-A187A1C T1
24
OUTPUT L/H BOARD PARTS LIST
Item Part Number Qnty CAD Part Ref. Ref. Designator
1 74-120-001 1 AMP-061CP IC2
2 74-120-002 1 AMP-062CP IC3
3 74-120-003 1 AMP-071CP IC1
4 18-001-256 2 CAPCERU#100N C1, C2
5 18-045-017 2 CAPCERU#220N C7, C20
6 18-001-205 1 CAPCERU#2P2 C4
7 18-015-507 2 CAPELEC1.0H1 C6, C19
8 18-010-213 1 CAPELEC330C1 C3
9 18-001-321 2 CCU#47P C16, C18
10 18-015-505 1 CER.47L-50 C14
11 18-015-411 2 CER4.7-35 C15, C17
12 18-015-213 1 CER10L-16 C9
13 18-015-217 2 CER47L-16 C5, C8
14 18-045-009 2 CPE1N-63 C10, C13
15 27-023-002 1 DIN16MRA CON1
16 72-010-001 7 DIO-1N4148 D1, D2, D3, D4, D5,
D6, D7
17 72-025-005 1 FET-BF256A TR3
18 40-615-001 1 LED-5X2# LED1
19 44-001-001 1 MIC1 MC1
20 72-021-001 1 NPN-BC549C TR4
21 72-022-001 3 PNP-BC559B TR1, TR2, TR5
22 52-040-416 1 POTA2# VR2
23 52-055-416 1 POTA2#50K VR1
24 82-126-003 3 PUS204 S1, S2, S4
25 82-146-002 1 PUS404 S3
26 70-031-048 2 RESM1/8#100R R5, R9
27 70-031-054 1 RESM1/8#180R R15
28 70-031-069 1 RESM1/8#750R R16
29 70-031-073 1 RESM1/8#1K1 R12
30 70-031-081 1 RESM1/8#2K4 R10
31 70-031-090 2 RESM1/8#5K6 R7, R30
32 70-031-096 9 RESM1/8#10K R1, R2, R6, R18, R19,
R23, R24, R26, R29
33 70-031-100 2 RESM1/8#15K R11, R13
34 70-031-112 1 RESM1/8#47K R14
35 70-031-120 5 RESM1/8#100K R3, R17, R18, R25,
R28
36 70-031-128 4 RESM1/8#220K R8, R20, R21, R31
37 70-031-144 1 RESM1/8#1M R4
38 32-050-074 1 TRM-CRT#500K VR3
25
OUTPUT R/H BOARD PARTS LIST
Item Part Number Qnty CAD Part Ref. Ref. Designator
1 74-120-002 2 AMP-062V IC1, IC3
2 74-130-001 2 AMP-064V IC2, IC6
3 74-920-000 4 AMP-LIB LIB1, LIB2, LIB3,
LIB4
4 18-001-217 2 CAPCER22P-G C8, C50
5 18-001-245 2 CAPCERU#4N7 C6, C61
6 18-001-213 2 CAPCERU#10P C14, C55
7 2 CAPCERU#22P C9, C51
8 18-015-507 4 CAPELEC1.0H1 C12, C13, C56, C57
9 18-015-411 2 CAPELEC4.7E1 C1, C48
10 18-015-213 8 CAPELEC100C1 C10, C11, C19, C20,
C23, C24, C52, C53
11 18-015-217 2 CAPELEC470C1 C7, C49
12 18-001-409 2 CCU#4P7 C31, C37
13 18-001-213 2 CCU#10P C18, C22
14 18-015-215 2 CER22-16 C32, C38
15 18-015-217 2 CER47-10 C62, C63
16 18-015-217 2 CER47L-16 C21, C25
17 USE_STANDARD_WIRE 16 CONWWIR CONWWIR/1, CONWWIR/1,
CONWWIR/2, CONWWIR/3,
CONWWIR/4, CONWWIR/5,
CONWWIR/6, CONWWIR/7,
CONWWIR/8, CONWWIR/9,
CONWWIR/10,
CONWWIR/11,
CONWWIR/12,
CONWWIR/13,
CONWWIR/14,
CONWWIR/15
18 74-020-002 1 DG413 IC4
19 27-023-002 2 DIN16MRA CON1, CON2
20 72-010-001 8 DIO-1N4148 D1, D2, D3, D4, D5,
D6, D7, D8
21 72-025-005 2 FET-BF256A TR2, TR3
22 52-055-416 2 POTA2#50K VR1, VR3
23 82-126-003 5 PUS204 S3, S4, S5, S6, S7
24 70-031-040 2 RESM1/8#47R R104, R105
25 70-031-048 2 RESM1/8#100R R53, R54
26 70-031-064 4 RESM1/8#470R R12, R14, R24, R88
27 70-031-072 4 RESM1/8#1K R10, R30, R40, R82
28 70-031-096 13 RESM1/8#10K R18, R20, R21, R31,
R32, R41, R42, R43,
R55, R61, R86, R87,
R92
29 70-031-103 6 RESM1/8#20K R17, R19, R23, R84,
26
R85, R89
30 70-031-104 1 RESM1/8#22K R65
31 70-031-112 15 RESM1/8#47K R4, R8, R15, R29,
R39, R56, R57, R58,
R59, R62, R63, R64,
R81, R94, R99
32 70-031-118 2 RESM1/8#82K R13, R83
33 70-031-120 10 RESM1/8#100K R5, R6, R22, R36,
R46, R60, R66, R90,
R100, R101
34 70-031-128 6 RESM1/8#220K R9, R16, R25, R91,
R93, R97
35 70-031-144 4 RESM1/8#1M R7, R11, R98, R103
36 32-050-052 4 TRM-CRT#100K VR4, VR5, VR6, VR7
37 32-050-074 1 TRM-CRT#220K VR10
38 72-012-110 1 ZEN-0.4W#5V6 ZD1
27
CONVERTER PARTS LIST
Item Part Number Qnty CAD Part Ref. Ref. Designator
1 18-001-256 9 CCU#100N C3, C5, C9, C13, C16,
C21, C22, C23, C24
2 18-001-229 1 CCU#220P C6
3 18-013-716 3 CER100-63 C7, C8, C10
4 18-013-219 5 CER330-16 C2, C11, C12, C14,
C15
5 18-013-320 5 CER470-25 C4, C17, C18, C19,
C20
6 12 CONSWIR WIRE1, WIRE2, WIRE3,
WIRE4, WIRE5, WIRE6,
WIRE7, WIRE8, WIRE9,
WIRE10, WIRE11,
WIRE12
7 USE_STANDARD_WIRE 2 CONWWIR WIRE13, WIRE14
8 72-011-001 1 DIO-1N4001 D1
9 72-010-001 2 DIO-1N4148 D3, D4
10 72-010-004 3 DIO-UF4002 D5, D6, D7
11 74-034-007 1 IC-4007 IC1
12 22-505-203 1 IND-U0.2#220UH L1
13 22-505-102 3 IND-U0.4#220UH L2, L3, L4
14 40-115-001 1 LED-5MM#RED LED1
15 36-166-500 1 MIS-FS2# MIS-FS2-/1
16 27-025-002 1 MOL2PIN CON2
17 27-025-003 2 MOL3PIN CON1, CON3
STEREO LINE MODULE
The two electronic- balanced inputs have instrumentation grade amplifiers for
optimum performance at line level.
The offset control BAL (1) allows up to 10dB (±5dB about the centre) of continuously
variable gain compensation between the input signals. This enables a stereo ganged
fader to be used.
EQ-IN (5) is a two position by pass switch for the equaliser. When IN is selected the
three adjacent rotary controls labelled HF, MF & LF are in circuit providing 3 bands of
equalisation. These controls act simultaneously and equally on both the left and right
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signals. Switching to the bypass (EQ) position enables immediate comparison of the
original unaltered signals without the need to disturb the chosen settings.
HF (2). – High frequency equalisation control giving ±12dB at 10kHz, variable slope.
MF (3). – Mid frequency equalisation control centred on 2.4 kHz giving ±15dB peak
and dip.
LF (4). – Low frequency equalisation control giving ±10dB at 100Hz, variable
turnover.
Push button switched L (6) and R (7) control the routing of the channel left and right
signals to the main left and right outputs. If both L and R are selected then the left
signal of the channel is routed to the main left output and the right signal of the
channel to the main right output.
If only L is engaged then the left input signal is routed to both left and right outputs.
Similarly the R push switch routes the right input signal to both left and right outputs.
PFL (8) – Pre-fader listen routes the signal at the pre-fader point to the monitor,
(headphones). This signal overrides other signals on the monitor. The LED (9)
indicates PFL is selected on a particular input channel.
L and R overload LED indicators (10) indicate when signal overload is approaching
and illuminate 3dB before dipping on the respective channel.
Should one of the OL indicators light, the BAL control should be rotated away from
that channel toward the other irrespective of the fader position. Should both L and R
overload indicators light, the EQ should be checked for correct adjustment before
resorting to reducing the external signal level.
Linear fader (11) is a 65mm length, conductive – plastic stereo fader. This controls
the amount of stereo input signal mixed to the main left and right groups, which are
selected and routed via the routing push-button switches.
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