AUSTRALIAN MONITOR DCM500 - Service manual

DCM500 Service Manual
Product Description
Set-Up/Test Procedures
Component Lists
Full Schematics
PCB Overlays
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
2
3
4
5
6
7
8
X1
1
2
3
D
D
4
5
D1
40A
BATTERY
F2
35A
+
24V
-
F1
10A
F3
35A
T1
+35VDC
BR1
C1
240AC IN
C2
C3
C4
10000U
S1
C
C
X8
1
2
3
X6
X5
X4
X1
X3
R2
47R
X2
X7
1
2
3
BR3
V1
BC639
C8
R3
100R
C5
4u7
0.15u
C6
4u7
RY1
R1
4K7
C7
10u
D3
12V
B
B
D2
PCB6203
A
A
Title
Size
A3
Date:
File:
1
2
3
4
5
6
DCM500 POWER SUPPLY
CD6203-1
C
Number
6-May-2003
C:\DCM Manuals\CD6203-1.DDB
7
Revision
Sheet of
Drawn By:
2
SBG
1
8
1
2
3
4
5
6
7
8
DCM500
D
V10-V15 = TIP35C
X1
1
500R
2
R36A
3
220R
R1A
R25,R27,R29,R31,R33,
R35 = 0.22R
R2A
11 X TIP35C
V4A
R4A
1K
D1A
R5A
150R
R6A
150R
V5A
V6A
V7A
V8A
V9A
R38A
47k
PCB6201
D2A
X1 TO PCB6136
X2 TO PCB6200 X3
2
3
4
X3 TO PCB6200 X4
V2A
R12A
2K2
R13A
R22
R14A
2K2
R15A
R22
R16A
2K2
R17A
R22
R18A
2K2
R19A
R22
R20A
2K2
R21A
R22
R22A
2K2
R23A
R22
X4 TO FAN
5
PCB6202
R40
0R
C
X3
1
2
R8A
470R
R41A
10k NTC
R39A
10R
35V
R10A
1K
X1 TP PCB6203
C1A
820P
R7A
10R
IC1A
78L05
X2 TO PCB6200 X1
X3 TO PCB6200 X2
R9A
1K
R11A
4K7
X4 TO FAN
V16
TIP41C
X3
4
V3A
BC556
5
3
X4
1
FAN
2
D4
24V
6
5
D3B
R10B
1K
3
2
1
70AC
2
4
1
R39B
4K7
R11B
4K7
FAN
COM
X4
4 OHM
X3
R7B
10R
C1B
820P
3
5
3
R41
NOT USED
BC556
V3B
R9B
1K
5
4
R40B
1K
IC1B
78L05
R8B
470R
X1
B
2
R5B
150R
1
R6B
150R
V2B
R12B
2K2
R13B
R22
R14B
2K2
R15B
R22
R16B
2K2
R17B
R22
R18B
2K2
R19B
R22
R20B
2K2
R21B
R22
R22B
2K2
R23B
R22
R42B
10R
X2
V4B
R4B
1K
2
V5B
V6B
47k
V8B
V9B
D2B
11 X TIP35C
V1B
R1B
220R
R37
0R
V7B
R38B
D1B
1
X3
T2
100VAC
5
4
C
PCB6202
D3A
B
D
R24,R26,R28,R30,R32,
R34 =2K2
V1A
R3A
220R
X2
1
+35V
220R
R3B
220R
R36B
500R
PCB6201
R2B
220R
+35V
A
A
Title
Size
A3
Date:
File:
1
2
3
4
5
6
DCM500 POWER PCB
C
CD6201-1
Number
8-May-2003
Sheet of
C:\DCM Manuals\CD6201-12.DDB Drawn By:
7
Revision
1
8
2
SBG
1
2
Microprocessor
3
4
5
6
7
8
Mute/Limiter/Drive
VCC
VCC
C8
100P
13
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
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
VCC
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
C26
4u7
16
R28
1
D
1
100K
IC6
PIC12C509
VDD
IC4A
LM833-A
R4
10K
V2
BC639
X3/3
T1B
68K
R2
X3/5
R6
680R
AGND
X3/4
X1/5
IC7
LN3915
C35
4u7
B
3
9
10
5
R48
1K
11
6
12
7
R49
10K
D31
13
D17
D18
D19
D20
+3DB
0
R44
1K
D16
VCC
C32
4u7
V4
BC556
X1/4
-6
VCC
X2/6
(N/C)
D27
IC6/P5
D10
MAINS
FAIL
Thermal Sense
R42
1K
R43
470R
-3
Protect/On Indicator
D13
VDD
R51
1K
Fan Control
X2/5
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
PROTECT
-12
POWER
Power
*
*
D22
16
D23
Current Limit
R14
22R
-15
X2/3
IC1
7815
16VDC
IC5
7805
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
4
IC6/P7
R36
10K
V7
BC546
V3
BC546
AGND
8V2
R34
22K
C18
4u7
DCM DRIVER
Date:
File:
3
4
5
P1
2K
Title
Number
6
Revision
CD6200-1
A3
2
X4/5
A
Size
1
X2/2
R53
1K
IC6/P4
AGND
2
R31
10k
C11
22u
R13
10K
C16
100u
-25
C15
100u
R18
1K
6-May-2003
Sheet of
C:\Protel Files\CDTRAX\CD6200-14.DDB Drawn By:
7
D
1
8
1
SBG
DCM500 Power Supply Components List
Designato Part Type
BR1
KBPC3504
BR3
KBPC3504
C1
15000uF
C2
15000uF
C3
15000uF
C4
15000uF
C5
4u7
C6
4u7
C7
10u
C8
0.15u
D1
40A
D2
1N4007
D3
12V
F1
***
F2
35A
F3
35A
R1
4K7
R2
47R
R3
100R
RY1
Relay
S1
Switch
T1
V1
BC639
Description
Bridge recitfier 600V/35A
Bridge recitfier 600V/35A
Electrolytic Capacitor 50V
Electrolytic Capacitor 50V
Electrolytic Capacitor 50V
Electrolytic Capacitor 50V
Electrolytic Capacitor 50V
Electrolytic Capacitor 50V
Electrolytic Capacitor 50V
Metalised Poly Capacitor 275V
Stud Mount Rectifier Diode 40A
Rectifier Diode
Zener diode 1W 12V
Fuse, refer user manual
Fuse, 35A 3AG
Fuse, 35A 3AG
Resistor, metal film .5W
PW5 Wire Wound resistor 5W
PW10 Wire wound resistor 10w
Relay 12V 16A SPDT
Rocker Switch DPST
Power transformer
Transistor TO92
Manufacturer's code
2134800356
2134800356
2121250153
2121250153
2121250153
2121250153
2121250479
2121250479
2121230100
2124290158
2135940100
2133440007
2136010120
2541120350
2541120350
9111590472
2111450470
2111460101
2522220793
2511210155
2651991355
2144200639
DCM Series Drive Stage Component List
Designato Part Type
C1
2u2
C10
2u2
C11
22u
C12
2u2
C13
47P
C14
47P
C15
100u
C16
100u
C17
2u2
C18
4u7
C19
47u
C2
2u2
C20
47u
C23
100P
C26
4u7
C3
10u
C32
4u7
C33
4u7
C35
4u7
C4
2u2
C5
2u2
C6
2u2
C7
100u
C8
100P
C9
.47u
D1
1N4148
D10
L-LED(red)
D13
L-LED(red)
D16
1N4148
D17
L-LED(red)
D18
L-LED(red)
D19
L-LED(grn)
D2
1N4148
D20
L-LED(grn)
D21
L-LED(grn)
D22
L-LED(grn)
D23
L-LED(grn)
D24
L-LED(grn)
D25
L-LED(grn)
D26
L-LED(grn)
D27
L-LED(grn)
D31
1N4148
D4
1N4007
IC1
7815
IC2A
LM358
IC2B
LM358
IC3
SA571
IC4A
LM833-A
IC4B
LM833-B
IC5
7805
IC6
PIC12C509
LK2
0R
LK3
0R
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
Link, zero ohms
Link, zero ohms
Manufacturer's Code
2121260229
2121260229
2121250220
2121260229
2127181470
2127181470
2121210101
2121210101
2121260229
2121250479
2121230470
2121260229
2121230470
2127181101
2121250479
2121230100
2121250479
2121250479
2121250479
2121260229
2121260229
2121260229
2121210101
2127181101
2124262472
2133440148
2137200003
2137200003
2133440148
2137200003
2137200003
2137500003
2133440148
2137500003
2137500003
2137500003
2137500003
2137500003
2137500003
2137500003
2137500003
2133440148
2133440007
2151370815
2152800358
2152800358
2153600571
2157800833
2157800833
2151270805
2159082509
9111590000
9111590000
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
T1A
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
RF2285A
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
Driver Transformer
9111590000
9111590000
2112210202
2112211473
2112210103
9111590683
9111590102
9111590391
9111590101
9111590103
9111590220
9111590104
9111590225
9111590473
9111590102
9111590104
9111590682
9111590103
9111590393
9111590103
9111590103
9111590103
9111590103
9111590103
9111590105
9111590104
9111590103
9111590103
9111590103
9111590103
9111590474
9111590223
9111590223
9111590333
9111590103
9111590103
9111590153
9111590123
9111590102
9111590471
9111590102
9111590272
9111590122
9111590102
9111590103
9111590681
9111590102
9111590102
9111590103
9111590103
9111590681
9111590101
9111590101
9111590562
DCM-120-24
T1B
V1
V2
V3
V4
V5
V6
V7
V8
V9
RF2285B
BC639
BC639
BC546
BC556
BC546
BC546
BC546
BC556
BC556
Please note
Please note
Driver Transformer
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
Transistor TO92
* DCM120-DCM500
** DCM250
DCM-120-24
2144200639
2144200639
2144200546
2144200556
2144200546
2144200546
2144200546
2144200556
2144200556
DCM500 Output stage Components List
Designator
C1A
C1B
D1A
D1B
D2A
D2B
D3A
D3B
D4
IC1A
IC1B
R10A
R10B
R11A
R11B
R12A
R12B
R13A
R13B
R14A
R14B
R15A
R15B
R16A
R16B
R17A
R17B
R18A
R18B
R19A
R19B
R1A
R1B
R20A
R20B
R21A
R21B
R22A
R22B
R23A
R23B
R2A
R2B
R36A
R36B
R37
R38A
R38B
R39A
R39B
R3A
R3B
R40
Part Type
820P
820P
1N4007
1N4007
1N4007
1N4007
1N4007
1N4007
1N4007
78L05
78L05
1K
1K
4K7
4K7
2K2
2K2
R22
R22
2K2
2K2
R22
R22
2K2
2K2
R22
R22
2K2
2K2
R22
R22
220R
220R
2K2
2K2
R22
R22
2K2
2K2
R22
R22
220R
220R
500R
500R
0R
47k
47k
10R
4K7
220R
220R
1K
Description
Multi layer Ceramic Capacitor
Multi layer Ceramic Capacitor
Rectifier Diode
Rectifier Diode
Rectifier Diode
Rectifier Diode
Rectifier Diode
Rectifier Diode
Rectifier Diode
Voltage regulator IC TO92
Voltage regulator IC TO92
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Wire wound resistor 5W
Wire wound resistor 5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Wire wound resistor 5W
Wire wound resistor 5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Wire wound resistor 5W
Wire wound resistor 5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Wire wound resistor 5W
Wire wound resistor 5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Wire wound resistor 5W
Wire wound resistor 5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Wire wound resistor 5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Cermet, preset horizontal
Cermet, preset horizontal
Link, zero ohms .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Manufacturer's Code
2127181821
2127181821
2133440007
2133440007
2133440007
2133440007
2133440007
2133440007
2133440007
2151270805
2151270805
9111590102
9111590102
9111590472
9111590472
9111590222
9111590222
2111450228
2111450228
9111590222
9111590222
2111450228
2111450228
9111590222
9111590222
2111450228
2111450228
9111590222
9111590222
2111450228
2111450228
9111590221
9111590221
9111590222
9111590222
2111450228
2111450228
9111590222
9111590222
2111450228
2111450228
9111590221
9111590221
2112210501
2112210501
9111590000
9111590473
9111590473
9111590100
9111590472
9111590221
9111590221
9111590102
R40B
R41
R41A
R42B
R4A
R4B
R5A
R5B
R6A
R6B
R7A
R7B
R8A
R8B
R9A
R9B
T2
V16
V1A
V1B
V2A
V2B
V3A
V3B
V4A
V4B
V5A
V5B
V6A
V6B
V7A
V7B
V8A
V8B
V9A
V9B
1K
Resistor, Metalfilm .5W
9111590102
100D
10R
1K
1K
150R
150R
150R
150R
10R
10R
470R
470R
1K
1K
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
Resistor, Metalfilm .5W
9111590100
9111590102
9111590102
9111590151
9111590151
9111590151
9111590151
9111590100
9111590100
9111590471
9111590471
9111590102
9111590102
TIP41C
TIP41C
TIP41C
IRF9520
IRF9520
BC556
BC556
TIP35C
TIP35C
TIP35C
TIP35C
TIP35C
TIP35C
TIP35C
TIP35C
TIP35C
TIP35C
TIP35C
TIP35C
Transistor TO220
Transistor TO220
Transistor TO220
Mosfet, hexfet
Mosfet, hexfet
Transistor T092
Transistor T092
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
Transistor TOP-3
2141300041
2141300041
2141300041
2142309520
2142309520
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
2141600035
DCM500 Major Components price list
Part
Description
Manufacturer code in house AUD$
PCB's
Power Supply PCB
Input
Output Left
Output Right
Display-front PCB
Relay PCB
Capacitor mount PCB
Input PCB assy
Output PCB assy
Output PCB assy
Display PCB
Relay slow start PCB
S5728MDCM50003
S5728MDCM50005
S5728MDCM50001
S5728MDCM50002
S5728MDCM50006
S5728MDCM50004
$47.13
$10.05
$66.79
$62.75
$33.44
$8.18
Transformers
230/240VAC
Output
Fuse 35 amp
Bridge Assembly
Drive transformer
Mains 230/240V
Output
DC rail fuse
Bridge Assembly
Drive Transformer
2561991355
2651991357
2541120350
S5728MDCM50023
S5728MDCM50007
$79.36
$65.99
$0.51
$27.31
$2.30
Semiconductors
TIP35C
TIP41C
BC639
BC640
BD140
BD139
LM1458
LM833N
LM358
LM78L05
LM7815
LM7818
10k Thermistor
IRF 9530
PIC 12C509
LED blue
KBPC 3506
SA 571N
LM 3915N
NPN TO3P transistor
PNP TO220 transistor
NPN TO92
PNP TO92
PNP TO92
NPN TO92
IC Dual Op amp
IC Dual Op amp
IC Dual Op amp
IC Regulator
IC Regulator
IC Regulator
Bridge rectifier 35A
Compander
LED driver IC
2141600035
2141300041
2144200639
2144200640
2141400140
2141400139
2152801048
2157800833
2152800358
2151270805
2151370815
2151370818
2111911103
2142309530
2159082509
2137600003
2134800356
2153600571
2156603915
Input attenuator
Rocker switch
2112211473
2511210155
Mosfet IRF9530
PIC 12C509A, 8 PIN
TIP36C
TIP42C
S7007
S7008
S7009
LM1458
LM833
LM358
LM7805
LM7815
LM7818
$3.60
$2.01
$0.16
$0.16
$0.22
$0.22
$0.27
$1.05
$1.05
$0.17
$0.52
$0.52
$0.80
$3.49
$4.17
$0.13
$7.49
$3.69
$3.77
Switches & Pots
Volume Pot
Power switch
$0.56
$1.39
Hardware
Front Panel
Lid
Rack ears
Chassis
Barrier Strip
XLRF
XLMR
Screw + washer
Screw
Acrylic cover for
terminal
Fuse Holder
FAN 12V
Front Panel DCM500
Top cover DCM500
Rack ears
Chassis Pan DCM500
6 way barrier connector
XLF Female connector
XLR Male connector
Black screw w/star
Black screw wo/star
Clear cover for 6 way
barrier connector
DCM series fuse holder
DCM Series 12vdc fan
S600000132
S600000130
S600000137
S600000129
2583528306
2587210266
2587110227
2316420308
2316421306
9347560006
$4.88
$13.14
$4.35
$22.92
$2.51
$1.35
$1.08
$0.08
$0.08
$0.31
2344400322
2571120122
$1.00
$6.33