DCM120 Service Information
SERVICE INFORMATION
DCM120
POWER AMPLIFIER
CONTENTS:
OPERATION MANUAL
CIRCUIT DESCRIPTION
SET-UP / TEST PROCEDURE
SCHEMATIC DIAGRAMS
PCB OVERLAYS
COMPONENT LISTS
Australian Monitor
1 Clyde Street, Silverwater NSW 2128 Australia
+61 2 9647 1411
www.australianmonitor.com.au
DCM120
120w Power Amplifier
HI
T EM P
ON 24 21 18 15 12
9
6
3
0
+3
M A IN S
FA IL
D C M 12 0
Operating Manual
DCM120, 120 Watt Power Amplifier
Product Description
The DCM120 is a 120 watt power amplifier designed for commercial installations. It can be used for either low impedance
(4 or 8 ohm) or 70v/100v line speaker systems. The amplifier can be mounted in a standard 19” equipment rack or it can
be used on a shelf or table. The DCM120 features a line level input (with parallel output) and is normally used with mixers,
mixer amplifiers or other power amplifiers. The DCM120 will operate from 230/240 VAC @ 50 Hz (115 VAC @ 60
Hz with factory modification) or 24 VDC and will meet its full performance specification on either voltage supply.
The DCM120 also features a DC battery trickle charge facility, auto-sensing fan cooling, plus overload, short circuit
and over temperature protection.
HI
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Front Panel Features
Power Switch
The rocker switch located in the front centre of the panel turns AC power on to the DCM120. Rocking the power switch
to the right to turns the AC power ‘on’. When the AC power is ‘on’, a blue LED will glow. Please note that this switch
does not switch DC voltage. If a DC voltage supply is connected to the DCM120, the amplifier will operate as soon
as the connection is made, regardless of the position of the AC power switch. If both an AC and DC voltage supply are
connected and you rock the AC power switch to the ‘off’ position, the DCM120 will automatically continue to
operate normally from the DC supply (and the ‘mains failure’ LED will also glow under these conditions).
Level Control
The output level control is located in the centre of the front panel, just to the left of the mains rocker switch (recessed screwdriver adjustable pot). Turning the control clockwise will increase the output of the DCM120 towards
it’s maximum output level while turning the control counter-clockwise will decrease the output level. Adjust this
control for the desired output level depending on the level of the input signal (from a mixer or other signal source).
The factory default setting for this control is such that a 1 volt input will give a 100 volt output.
Amplifier Status Display
The amplifier status display highlights the operating condition of the DCM120. The status display indicates:
High Temperature: This red LED glows if the fan has failed and the amplifier has been shut down by its temperature
control circuitry. If this LED is glowing and the fans have not failed, it means that the amplifier is operating in an ambient
environment that is too hot for fan cooling to make any difference to the temperature of the amplifier.
Power: This LED glows blue if AC power is switched on to the DCM120. Note that this LED does not indicate the
presence of a DC supply voltage.
Mains Failure: The LED glows red if there is a failure in the AC mains power supply. However, this LED will only glow
if there is a DC supply voltage present. If no DC supply voltage is present then this LED will not glow.
Output Level VU Meter: A 10 segment LED VU meter is provided to give an indication of the output signal level of the
amplifier from -25 to +3 dB. During normal operation, the LED’s will oscillate with changes in the program signal. Care
should be taken to avoid more than occasional illumination of the red LED’s. If the LED’s in the red zone are lit
continually, then the output level control (or the level of the input signal to the DCM120) should be adjusted to reduce
the output level. Too much output level can cause distortion, activate the internal limiter or possibly damage the
connected speaker system.
C
OH M
4
8
C
VOLT
70
100
230 V
240 V
IN PUT
DC FUSE
10A S/B
EN GINEERED BY AUDIO TELEX CO M MUN IC ATIO NS PTY LTD SYDN EY AUSTRALIA
AC FUSE 4A S/B
24 VDC
Rear Panel Features
AC Power Inlet
The 3 pin IEC power inlet is located on the bottom left of the rear panel and accepts a standard mains power lead fitted
with an IEC connector. Before plugging in a power lead, please check the rear panel of the amplifier to ensure that the
voltage label shows the correct AC operating voltage for your part of the world.
The inlet is equipped with an in-built AC fuse holder fitted with a 4 Amp slow blow fuse plus a spare fuse. Please ensure
that the mains power cord is disconnected before attempting to check or replace this fuse. Power consumption is 300
VA (max).
Speaker Output Terminal Strip
Located on the top left of the rear panel is the speaker output terminal strip. Reading from left to right, the connections
are:
COM Common or “-” for low impedance speaker loads (4 or 8 ohms).
4
The “+” for 4 ohm speaker loads (use with common)
8
The “+” for 8 ohm speaker loads (use with common)
COM
70
100
Common or “-” for 70v or 100v speaker loads (maximum load of 80 ohms at 100v)
The “+” for 70v line speaker loads (use with common)
The “+” for 100v line speaker loads (use with common)
Please ensure that the correct “Common” is used. Low impedance and 70/100v loads can be used simultaneously but
please pay careful attention to the overall speaker load. When used individually, the low impedance load should be 4
ohms or higher while the 100v line load should not fall below 80 ohms. When both outputs are used simultanously,
ensure that neither output is loaded to maximum.
24 Volt Power
Located on the rear panel are the red and black connection posts for 24v power. This feature can be used as either a backup facility (if mains power fails) or for applications where AC power is not available. The left side red post is the +
(positive) terminal while the right side black post is the - (negative) terminal. The DC current drain is 8 Amps maximum
at full power. This socket also provides trickle charge to a DC battery supply (if connected) when the DCM120 is
operated from AC mains power. The level of trickle charge is 300 mA, maximum.
XLR Audio Input and Parallel Output
The input to the DCM120 is transformer balanced @ 10K ohms. When signal is connected to one XLR, the other
XLR becomes a line level output allowing the input signal to be distributed (split) to other amplifiers. In some
projects, the same input may be looped through to multiple amplifiers using this method. Up to 6 amplifiers can be
looped together without any noticeable loss in level. A distribution amplifier should be used when more than 6
amplifiers need to be looped.
The XLR’s are wired as follows: Pin 1: Shield. Pin 2: Hot, +, Positive. Pin 3: Cold, -, Negative
DC Fuse Receptacle
Located on the rear panel is the DC fuse receptacle. Access the DC fuse by turning the cap counter-clockwise with a
screwdriver. The value of the fuse is 10 Amps. Please ensure that the AC power switch is in the ‘off’ position
and that the mains power cord is disconnected before attempting to check or replace this fuse
Cooling Fan (Air Intake)
The cooling fan is temperature sensitive and will only switch on when the temperature of the DCM120 had reached a predetermined range. The fan will stay on and only switch off again once the temperature of the DCM120 has fallen below
a pre-determined level. If the DCM120 is operating continually at conservative levels and proper load conditions, it is
possible that the cooling fan will not switch on at any time during normal operation. When operating, the fan works with
air flow from the front to the rear of the DCM120.
Fuse Sizes
Mains, 240VAC: 4 Amperes Slow Blow.
Important Safety Information
1. Save the carton and packing material even if the equipment has arrived in good condition. Should you ever
need to ship the unit, use only the original factory packing.
2. Read all documentation before operating your equipment. Retain all documentation for future reference.
3. Follow all instructions printed on unit chassis for
proper operation.
4. Do not spill water or other liquids into or on the unit,
or operate the unit while standing in liquid.
5. Make sure power outlets conform to the power requirements listed on the back of the unit.
6. Do not use the unit if the electrical power cord is
frayed or broken. The power supply cords should be
routed so that they are not likely to be walked on or
pinched by items placed upon or against them, paying
particular attention to cords and plugs, convenience receptacles, and the point where they exit from the
appliance.
7. Always operate the unit with the AC ground wire
connected to the electrical system ground. Precautions
should be taken so that the means of grounding of a
piece of equipment is not defeated.
8. Mains voltage must be correct and the same as that
printed on the rear of the unit. Damage caused by
connection to improper AC voltage is not covered by
any warranty.
9. Have gain controls on amplifiers turned down during
power-up to prevent speaker damage if there are high
signal levels at the inputs.
10. Power down & disconnect units from mains voltage
before making connections.
11. Never hold a power switch in the “ON” position if it
won’t stay there itself!
12. Do not use the unit near stoves, heat registers, radiators, or other heat producing devices.
13. Do not block fan intake or exhaust ports. Do not
operate equipment on a surface or in an environment
which may impede the normal flow of air around the
unit, such as a bed, rug, weathersheet, carpet, or completely enclosed rack. If the unit is used in an extremely
dusty or smoky environment, the unit should be periodically “blown free” of foreign matter.
14. Do not remove the cover. Removing the cover will
expose you to potentially dangerous voltages. There
are no user serviceable parts inside.
15. Do not drive the inputs with a signal level greater
than that required to drive equipment to full output.
16. Do not connect the inputs / outputs of amplifiers
or consoles to any other voltage source, such as a
battery, mains source, or power supply, regardless of
whether the amplifier or console is turned on or off.
17. Do not run the output of any amplifier channel
back into another channel’s input. Do not parallel- or
series-connect an amplifier output with any other
amplifier output.
Audio Telex Communications Pty Ltd is not responsible for damage to loudspeakers for any reason.
18. Do not ground any red (“hot”) terminal. Never
connect a “hot” (red) output to ground or to another
“hot” (red) output!
19. Non-use periods. The power cord of equipment
should be unplugged from the outlet when left unused for a long period of time.
20. Service Information Equipment should be serviced
by qualified service personnel when:
A. The power supply cord or the plug has been
damaged.
B. Objects have fallen, or liquid has been spilled into
the equipment
C. The equipment has been exposed to rain
D. The equipment does not appear to operate normally,
or exhibits a marked change in performance
E. The equipment has been dropped, or the enclosure
damaged.
DCM Series
Circuit Description
The DCM series are power amplifiers designed for commercial installations. They can be used for
either low impedance (4 ohm/8 ohm) or constant voltage line speakers (100v/70v). These amplifiers
can be mounted in a standard 19” equipment rack or they can be used on a shelf or table. The DCM
series feature line level input (with parallel output) and are normally used with mixers, mixer amplifiers
or other power amplifiers. The DCM series will operate from mains voltage or 24VDC. The DCM
series also feature a DC battery trickle charge facility, auto-sensing fan cooling, plus overload, short
circuit and over temperature protection.
Power Switch
This switch controls the switching of AC power to the amplifier. A blue ‘On’ LED will indicate
whether the amplifier is switched on or off. This switch will not switch DC power on or off in DC
operation. In DC operation mode, the amplifier is always on and the blue power LED will always be
illuminated. If both AC and DC voltage supply are connected and the AC power switch is in the off
position, the amplifier will continue to operate normally from the DC supply and the mains fail LED
will indicate.
Level Control
The output level control is located in the centre of the front panel. It is a fully recessed screwdriver
adjustable pot. Turning this pot cw will increase the gain of the amplifier. At maximum setting the
input sensitivity is 300mV. The amplifier ships from the factory with the sensitivity set to 1V.
Amplifier Status Display
This VU meter indicates the output level of the amplifier. The sensing for the circuit is taken on the
amplifier side of the output transformer. The 0dB level is referenced to 100V. This is an RMS meter,
not a peak meter.
Protect
The protect LED will illuminate when the amplifier cuts out because of either over current or high
temperature. The amplifier will switch back on after approx 4 sec for an over current trip. The amplifier
will switch back on after the amplifier has cooled to 60degC for a thermal trip.
Limiter
The limiter is a hard limiter with an attack time of about 1msec. It is defeatable by removing the jumper
on the solder side of the front pcb. This however is not recommended as voltage overload and speaker
transformer current saturation may cause the amplifier to cut out under normal program material.
Current Limit and Setup
Current limit is controlled by a microprocessor (PIC12C509A). The detection is done by sensing
voltage across the emitter resistors. Trimpot P1 on the front pcb is accessible through the hole in the
top right of the chassis return (only visible with the lid off). Turning the trimpot ccw will decrease the
point at which the amp cuts out ie the amp will cut out earlier. (P1 resistance is increased.)
To set the current limit:
1. Reset the trimpot P1 turning fully clockwise.
2. Connect the amplifier to half it’s minimum load (10ohm for DCM500, 20ohm for DCM250,
40ohm for DCM120).
3. Run an rms 1kHz sine wave into the amplifier and set the input level so that you read
425mVDC (DCM250/500) or 825mVDC (DCM120) across the emitter resistor, measuring the
side which has the higher current (measured as a voltage across the emitter resistors).
4. Turn the trimpot P1 ccw till the amplifier cuts out. The amplifier is set to the factory default.
Thermal and Fan control and Setup
The thermal cutout and fan is controlled by a microprocessor (PIC12C509A). The temperature is
sensed using a 10k@25degC NTC. The fan is normally off and turns on to full speed at 60degC. This
temperature is fixed and not adjustable. The thermal cutout temperature is set using the trimpot
accessible through the hole in the top left side of the chassis return (only visible with the lid off).
Turning the trimpot cw will decrease the point at which the amp cuts out ie the amp will cut out earlier.
Power Amp
The power amplifier is a push pull single supply amplifier driven by a class A transformer coupled
front end. The drive is provided by HEXFETs (RF9520/9530) into NPN BJTs (TIP35C). When
replacing the FETs it is recommended that you replace both FETs. The matching of these FETs
determines the balancing of the emitter currents in the output devices. For optimum performance the
emitter currents in each side should match to within 30% of each other.
Bias Setup
The amplifier is set with a bais setting of 1mV measured across the emitter resitors.
Bias is set using the trimpots located on the power pcbs on each side of the amplifier.
Turning the trimpots cw increases the bias.
If the HEXFETs have been replaced the resistor in series with the pot may need to be changed. Use a
lower value resistor if the bias cannot be turned off or a higher value if the bias cannot be turn on.
AC Power Inlet
The operating voltage is 230/240 VAC @ 50 Hz. The 3 pin IEC power inlet is located on the bottom
left of the rear panel and accepts a standard mains power lead fitted with an IEC connector. Before
plugging in a power lead, please check the rear panel of the amplifier to ensure that the voltage switch
is set correctly for your part of the world.
The inlet is equipped with an in-built AC fuse containing the rated fuse and a spare.
24 Volt DC Power Inlet
The DCM series feature optional 24VDC power to run off a battery back-up if required. This is
connected via the rear binding posts. The front panel Power Switch will not switch DC power ‘on’ or
‘off’ in DC operation. In this mode the amplifier is always ‘on’.
The trickle charge resistor across the diode is a 47ohm/5watt wire wound resistor. The maximum
trickle current is 300mA supplied from internal 35V rails.
230V/240V Slide Switch
The operating voltage of the amplifier is user selectable between 230V and 240V via a slide switch
located on the center of the rear panel. This switch should be set to match the AC voltage of your
country. The mains transformer is wound with a 230V winding plus a 10V winding internally
connected.
Speaker Output Terminal Strip
The screw terminals located on the top left of the rear panel allow access to the direct speaker outputs
of the amplifier. Reading from left to right the terminals are:
COM
4
8
Common or “-” for low impedance speaker loads (4 or 8 ohms)
Positive “+” for 4 ohm speaker loads (use with common)
Positive “+” for 8 ohm speaker loads (use with common) DCM120 only
COM
70
100
Common or “-” for 70v or100v speaker loads
Positive “+” for 70v line speaker loads (use with common) DCM120/500 only
Positive “+” for 100v line speaker loads (use with common)
Please ensure that the correct “Common” is used. Low impedance and 70/100v loads can be used
simultaneously but please pay careful attention to the overall speaker load.
Note: The minimum impedance (or maximum load) at 100 volt line should be no less than
DCM120 – 80 ohms
DCM250 – 40 ohms
DCM500 – 20 ohms
XLR Audio Input and Parallel Output
The DCM series includes both male and female 3 pin XLR connectors per channel. While the female is
normally used as the input to the amplifier, both XLR’s are connected in parallel so either will work.
The XLR’s inputs are transformer balanced and wired as:
Pin 1: Shield.
Pin 2: Hot, +, Positive
Pin 3: Cold, -, Negative
Fuse Sizes
(DCM120)
Mains: 230 VAC 4 Amperes Slow Blow HRC 20x5mm
DC: 10 Amperes Slow Blow HRC 20x5mm
(DCM250)
Mains: 230 VAC 6.3 Amperes Slow Blow 20x5mm
DC: 2 x 10 Amperes Slow Blow HRC 3AG
(DCM500)
Mains: 230 VAC 10 Amperes Slow Blow HRC 20x5mm
DC: 2 x 35 Amperes Slow Blow 3AG
TESTING PROCEDURE OF DCM 120/DCM 250/DCM 500
I. PRE-TESTING (of complete sets).
•
Check
1.1 All screw for tightness (Bridge rectifier and transistor bolts)
1.2 Earth Connection for good contact (solder and crimpling)
1.3 This setup has signal input to the Amplifier through male (XLR)
1.4 Check with Multimeter that there is a DC resistance of about 250 Ω between
Pin2 & Pin3 of each of XLR’s. Also between (Pin 1 & Pin 3) and (Pin1 & Pin2).
There should be very high resistance. (IE: no reading).
2. Electrical Check
2.1 Fuse Check:
Mains fuse:
DC fuse:
DCM 120
DCM 250
DCM 500
4AT
10AT (x1)
6.3 AT
10AT (x2)
10 AT
35AT (x2)
2.2 Connect the Amplifier to the setup (Variac voltage = 0V) set all presets on front
board (only) fully clockwise, voltage selector switch to 230V
2.3 Slowly increase the input voltage to 230V, keep watching the input current
should not exceed 0.1A for DCM-120, 0.1A for DCM-250, 0.1A for DCM 500.
2.4 Check and reset if necessary all emitter resistor voltages with the help of preset.
(Each emitter resistor voltage should be between 0.5 mV to 0.8 mV )
2.5 Check DC voltage Main rail = 33V
7815 input = 30V
7815 output = 15.5V
2.6 Give input signal of 500 mV to get outputs as follows (@ 4Ω output load)/ 22V
for DCM 120, 32VAC for DCM250, 44.7VAC for DCM 500. Check 100V O/p
at 100vV line, Remove the input signal
II. FINAL TESTING
(This setup should have signal input to Amplifier through female (XLR)
(The limiter link should be out of circuit initially.)
1. Connect the Amplifier to the setup, set voltage selector switch to 240V
2. Switch ON the set to 240VAC.
3. Slowly increase the input signal (of 1kHz) keep watching the 24dB LED, it should
glow at approx 9V output. Increase the input signal to get 70VAC output.
4. Check Dc voltage of all emitter resistors, Minimum value should be within 30% of
the maximum value.
5. Slowly increase the input signal, keep watching the 0db LED, it should glow at 100V
± 5V output voltage.
6. Set 100V 1kHz as 0db reference. Change frequency to 10kHz check dB level drop. It
should be 2.5dB ± 0.5dB.
7. Change the frequency to 1kHz, reduce signal level to get 10VAC output. Half the
output load.
8. Overload setting: - Check the DC voltage at the emitter resistors having the
maximum voltage value. Increase input signal to get 820mV for DCM 120, 425mV
(for DCM250 & DCM 500). Turn preset (P2) anticlockwise such that it just mutes
the output signal and signal returns back slowly after 2 seconds.
9. Reduce the signal & re check whether the signal mutes at the corresponding above
stated voltages.
10. Again make the output load to original full value. Turn volume preset fully
anticlockwise, set input signal strength to 1V, set volume preset clockwise to get
100V output.
11. Set input signal strength to get output 110V VAC. Insert limiter link, the signal
should reduce to 100V ± 5V.
12. Remove the input signal and check noise. It should measure less than 25mV.
III. THERMAL & SOAK TEST
1. Connect the Amplifier to the setup : Output load = 4Ω Output Voltage: (DCM 120):
14V. (DCM 250):20V. (DCM 500): 40V
2. Set the Amplifier thermal cut off temperature at around 105°C with the help of preset
P4.
3. Leave the unit “ON” (with lid fixed, if possible) for 24 hours.
IV. Sound Test/Listening test.
1. Switch On the set. Check for any switch on thump.
2. Connect CD player to the input, listen for irregularities if any.
3. Switch off the set check for switch off noises.
1
D
2
X1
1
500R
2
R2
3
220R
R1
3
4
6
7
8
+35V
100R
D
R3
V1
TIP41C
R4
220R
TIP35C
X2
1
5
TIP35C
V4
R5
1K
D1
R6
150R
R7
150R
V5
R8
47k
D2
2
IRF9520
3
4
V2
R17
1K
R18
R22
R19
1K
R20
R22
5
R9
0R
X3
1
C
2
R11
10R
C1
820P
R13
470R
R10
10k NTC
35V
R12
1K
IC1
78L05
R15
10R
R14
1K
R16
4K7
X3
4
V3
BC556
5
V11
TIP41C
3
X4
1
FAN
2
D4
15V
6
C
T2
100VAC
70AC
D3
COM
2
5
1
D5
R34
47R
R21
1K
X7
R37
1K
IC2
78L05
R41
NOT USED
BC556
V9
R23
1K
R22
470R
R24
4K7
8
R43
22R
5
4
4
OHM
COM
3
X6
R38
3K3
5
4
B
R25
10R
C2
820P
3
TO X7
B
2
R26
150R
1
R27
150R
R28
1K
IRF9520
R29
R22
R39
1K
R40
R22
R42
10R
X5
V7
V8
R31
1K
2
47k
TIP35C
+ BATTERY
24V
-
D7
F2
10A
R30
D6
T1
F1
4A
BR1
+35VDC
TIP35C
S1A
V6
1
X6
V10
D8
40A
R33
220R
C3
R32
220R
240AC IN
S1B
10000U
TIP41C
+35V
500R
R35
R36
100R
A
A
Title
Size
A3
Date:
File:
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DCM120 POWER PCB
CD6206-1
B
Number
8-May-2003
C:\DCM Manuals\CD6206-12.DDB
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Revision
Sheet of
Drawn By:
1
8
1
SBG
1
2
Microprocessor
3
4
5
6
7
8
Mute/Limiter/Drive
VCC
13
VCC
2
3
4
VDD
VSS
GP5
GP0
GP4
GP1
GP3
GP2
8
R16 2M2
7
X3/1
6
C5
2u2
47K
P2
5
R35 33K
I/O
Desc
7.
GP0-OUT = 1/2VCC CON
6.
GP1-OUT = FAN CON
5.
GP2-OUT = PRTCT/MUTE
VCC
4.
GP3-IN
= I LIMIT
3.
GP4-IN
= FAN SENSE
2.
GP5-IN
= THRML SENS
3
14
5
12
6
11
7
10
8
9
C13
47P
R29
10K
2M2 R27
15
C17
2u2
R25
10K
LK2
C9
.47u
C12
R19
2u2
100K
R30
10K
V5
BC546
VU Display
X1/2
V1
BC639
D1
C23
100P
R12
100R
C3
10u
LK4
0R
R8
100R
R21
39k
C2
2u2
R11
390R
VCC
LK6
0R
10k
R22
C
X3/2
IC2B
LM358
Battery Indicator
X2/1
(N/C)
C6
2u2
R24
10k
D2
R10
1K
R7
100R
X5
IC2A
LM358
0R
LK3
C19
47u
R3
10K
IC4B
LM833-B
AGND
R9
5K6
V8
BC556
R17
47K
D
X1/1
R5
680R
X1/3
R20
10k
IC6/P5
C
T1A
R1
68K
C1
2u2
VCC
R26
10K
C33
4u7
R23
10K
C14
47P
4
100K
R15
Pin
IC3A
SA571
2
2u2
C10
C8
100P
C26
4u7
16
R28
1
D
1
100K
IC6
PIC12C509
VDD
IC4A
LM833-A
R4
10K
V2
BC639
68K
R2
X3/3
T1B
X3/5
R6
680R
AGND
X3/4
X1/5
3
IC7
LN3915
C35
4u7
9
5
R48
1K
6
B
D31
D17
11
D18
12
7
R49
10K
10
13
D19
D20
+3DB
0
R44
1K
D16
VCC
C32
4u7
V4
BC556
X1/4
-6
VCC
D13
Fan Control
X2/5
X2/6
(N/C)
D27
IC6/P5
D10
MAINS
FAIL
Thermal Sense
R42
1K
R43
470R
-3
Protect/On Indicator
VDD
R51
1K
R55
10K
P4
10K
R56
10K
IC6/P2
V6
BC546
IC6/P6
R46
1K2
14
D21
B
X4/4
FAN CONTROL
IC6/P3
-9
X2/4
X4/3
X4/1
8
R41
15
R45
2K7
-12
PROTECT
POWER
Power
*
*
D22
16
D23
Current Limit
R14
22R
-15
X2/3
IC1
7815
IC5
7805
16VDC
VCC
VDD
VDD
X4/2
R41=15K=DCM120/500
R41=12K=DCM 250
17
D24
-18
18
D25
-21
R32
470K
V9
BC556
X4/6
GND
C7
D4 100u
C4
C20
47u
VDD
2u2
1
A
D26
R33
22K
IC6/P4
IC6/P7
4
R36
10K
V7
BC546
V3
BC546
AGND
8V2
AGND
2
R31
10k
C11
22u
R13
10K
C16
100u
-25
C15
100u
R34
22K
C18
4u7
4
5
P1
2K
DCM DRIVER
Date:
File:
3
X4/5
Title
Number
6
Revision
CD6200-1
A3
2
X2/2
R53
1K
A
Size
1
R18
1K
6-May-2003
Sheet of
C:\Protel Files\CDTRAX\CD6200-14.DDB Drawn By:
7
D
1
1
SBG
8
DCM120 Output Component List
Designator
BR1
C1
C2
C3
D1
D2
D3
D4
D5
D6
D7
D8
F1
F2
IC1
IC2
R1
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R2
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R3
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R4
R40
Part Type
KBPC 3506
820P
820P
15,000uF
LED
1N4148
1N4007
1N4148
1N4007
LED
1N4007
40A
**
T10A
78L05
78L05
220R
NTC 10k
KBPC 3506
1K
470R
1K
10R
4K7
1K
R22
1K
500R
R22
1K
470R
1K
4K7
10R
150R
150R
1K
R22
100R
47k
1K
220R
220R
47R
500R
100R
1K
3K3
1K
220R
R22
Description
Bridge rectifier 400V 35A
Multi layer Ceramic Capacitor
Multi layer Ceramic Capacitor
Electrolytic Capacitor 50V
LED Green 3.0mm
Diode Rectifier
Diode Rectifier
Diode Rectifier
Diode Rectifier
LED Green 3.0mm
Diode Rectifier
Stud Mount Rectifier Diode
Fuse, Refer Manual
Fuse 10A HRC
Regulator 5V TO92
Regulator 5V TO92
Metal film resistor .5W
Thermistor NTC
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Resistor, Metal Oxide 2W
Metal film resistor .5W
Metal film resistor .5W
Wire wound resistor 5W
Metal film resistor .5W
Cermet, preset horizontal
Wire wound resistor 5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Resistor, Metal Oxide 2W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Wire wound resistor 5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Thermistor NTC
Wire wound resistor 5W
Cermet, preset horizontal
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Wire wound resistor 5W
R41
R42
R43
R5
R6
R7
R8
R9
S1A
S1B
T1
T2
V1
V10
V11
V2
V3
V4
V5
V6
V7
V8
V9
80D
10R
22R
1K
150R
150R
47k
1K
Switch
Switch
Mains XFMR
Output XFMR
TIP41C
TIP35C
TIP41C
IRF9520
BC556
TIP35C
TIP35C
TIP35C
IRF9520
TIP35C
BC556
Not Used
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Metal film resistor .5W
Switch DPST
Switch DPST
Mains Transformer
Output transformer
Transistor
Transistor TOP-3
Transistor TO220
Mosfet, Hexfet TO220
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Mosfet, Hexfet TO220
Transistor TOP-3
Transistor TO92
DCM Series Drive Stage Component List
Designator
C1
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C2
C20
C23
C26
C3
C32
C33
C35
C4
C5
C6
C7
C8
C9
D1
D10
D13
D16
D17
D18
D19
D2
D20
D21
D22
D23
D24
D25
D26
D27
D31
D4
IC1
IC2A
IC2B
IC3
IC4A
IC4B
IC5
IC6
Part Type
2u2
2u2
22u
2u2
47P
47P
100u
100u
2u2
4u7
47u
2u2
47u
100P
4u7
10u
4u7
4u7
4u7
2u2
2u2
2u2
100u
100P
.47u
1N4148
L-LED(red)
L-LED(red)
1N4148
L-LED(red)
L-LED(red)
L-LED(grn)
1N4148
L-LED(grn)
L-LED(grn)
L-LED(grn)
L-LED(grn)
L-LED(grn)
L-LED(grn)
L-LED(grn)
L-LED(grn)
1N4148
1N4007
7815
LM358
LM358
SA571
LM833-A
LM833-B
7805
PIC12C509
Description
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Multi layer ceramic capacitor
Multi layer ceramic capacitor
Electrolytic Capacitor 16V
Electrolytic Capacitor 16V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Multi layer ceramic capacitor
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 35V
Electrolytic Capacitor 16V
Multi layer ceramic capacitor
Metalised Poly Capacitor 63V
Rectifier Diode
LED 3.0mm
LED 3.0mm
Rectifier Diode
LED 3.0mm
LED 3.0mm
LED 3.0mm
Rectifier Diode
LED 3.0mm
LED 3.0mm
LED 3.0mm
LED 3.0mm
LED 3.0mm
LED 3.0mm
LED 3.0mm
LED 3.0mm
Rectifier Diode
Rectifier Diode
Voltage regulator I.C TO220
Comparator, dual IC DIP
Comparator, dual IC DIP
Compander IC DIP
Dual op-amp IC DIP
Dual op-amp IC DIP
Regulator IC TO92
Programmable IC DIP
LK2
LK3
LK4
LK6
P1
P2
P4
R1
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R2
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R3
R30
R31
R32
R33
R34
R35
R36
R4
R41
R41
R42
R43
R44
R45
R46
R48
R49
R5
R51
R53
R55
R56
R6
R7
R8
R9
0R
0R
0R
0R
2K
47K
10K
68K
1K
390R
100R
10K
22R
100K
2M2
47K
1K
100K
68K
10k
39k
10k
10K
10k
10K
10K
2M2
100K
10K
10K
10K
10k
470K
22K
22K
33K
10K
10K
15K*
12K**
1K
470R
1K
2K7
1K2
1K
10K
680R
1K
1K
10K
10K
680R
100R
100R
5K6
Link, zero ohms
Link, zero ohms
Link, zero ohms
Link, zero ohms
Cermet, preset Horizontal
Potentiometer 16mm
Cermet, preset Horizontal
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
Resistor, metal film .5W
T1A
T1B
V1
V2
V3
V4
V5
V6
V7
V8
V9
RF2285A
RF2285B
BC639
BC639
BC546
BC556
BC546
BC546
BC546
BC556
BC556
Please note
Please note
Driver Transformer
Driver Transformer
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
* DCM120-DCM500
** DCM250
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