AUDIO TELEX DCM120 Operation Manual

SERVICE INFORMATION

AUDIO TELEX

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

c

.frl

lo g o

I

.fr,

O

= l-

AUlilrDililt@

ff{lTl

co M M u N

I

CATI O N

SPrar

LrD

www.audiotelex.com

120w

DCMl

Power

20

Amplifier

3

Ouditv

EndorseA

"ffiiH

Aud

io

Tel"1$pJnn"y,3j":"?ljons Pty

Ltd

NSW

& ACT

149

Beaconsfield

Street

Private Bag 149

Silverwater

NSW 2128

Australia

Ph

02 96/.7'141'l

FaxO29648 3698

42 Commercial Road

PO Box

871

Fortitude Valley QLD 4006

Ph

07

38521312

Fax 07

32521237

221277 Middleborough Road

Box

HillVlC

3128

PO Box

151

Blackburn

South

VIC

3130

Ph 03

98907477

Fax 03 9890 7977

299

Fitzgerald

West

Street

Perth

WA

6005

North

PO Box 404

Perth

WA

6906

Ph

08

92284222

Fax 08

9228 4233

Electronic Concepts Pty Ltd

76 George

Street

Thebarton

SA

5031

PO Box 7034 Hutt

Street

Adelaide

SA

5000

Ph

Fax

08

82349444

08

8234941

New

Zeafand

Unit B, 11 Piermark Drive

PO Box 512

Albany

NZ

1331

Ph

09

4159426

Fax 09 415 9864

K W

McOulloch Pty Ltd

54a

Albert

Road

MoonahTAS

7009

Ph

03

62286373

Fax 03 6278 1063

DCM120,12O

Watt

Power

Amplifier

Product Description

mounting.

The DCM120 has outputs operate

The DCM120 is

a

120 watt power amplifier

in

a two rack unit

(2RI)

chassis suitable for table or direct 19" rack from

240

V of ordering) or 24

DC battery

AC

@

50

tlz

or

I

I for

100

0

VAC

&

70 volts, 4

@ 60

llz

(not

&

8 ohms.

It has a balanced input of

10K ohms. The DCMI2O

will

user selectable,

YD(, and will meet it's frrll poformance specification on either voltage supply. The

DCMI2O also features a

tickle

charge facility, auto-sensing fan cooling, plus overload, internal,

shrt

facrory adjusnne,nt circuit and only, specify over temperature at the protection. time

The maximum recommended load for the

DCM120 is

80 ohms.

lnitial

Set Up

direction

There is an unlabelle4 screwdriver adjustable output level contol located curfrally on the front panel of the DCMI20.

Turning this control

in

the clockwise direction

will

increase the power output, turning this control

will

reduce the power output. The factory default setting for this conhol is such that a

I

volt

in

input a counter-clockwise wilt give a

100 volt output.

Front

Panel

Controls

Output

towards

Level:

The output level control is unlabelled recessed

(screwdriver adjustable) and front panel, just to the right of the

DCM

Series logo. Turning the control clockwise for the desired output level depending on the level of the input signal

(from a mixer or is located other sigrraisource). in the

will

increase the output of the DCM120 it's maxim'm output level while turning the control cormter-clockwise will decrease the output level. Adjust this contol

fni

centre of the factory default setting for this control is zuch that a

1 volt input will give a

100 volt output.

Power

Switch:

The rocker switch located in the front centre of the panel turns AC power on to the glow under these conditions; see the amplifier status display window section under Front

Panel

DCMI20.

Rocking the power switch to the right to turns the AC pow€tr

'on'.

When the AC power is

'on', a gre€n

LED will glow in the amplifio status display window.

Please note that this switch does not switch DC voltage.

If a

DC voltage supply is connected to the

DCMI20, the amplifier

will

operate as soon as the connection is madg regardless of the positim of the

AC power switch.

DC voltage supply are connected and you rock the

AC

power switch to the

'off

position, the DCM120

If

both an

will

AC and automatically continue to op€rate normally from the DC supply (and the 'mains failure' LED in the amplifier status display window

will

also

Confols later in this manual).

Cooling

Fans

(Air

lntake):

The cooling

ftn

is temperature sensitive and

will

only switch on when the tqnp€rature

of

the DCMI2O had reached a predetermined range.

The fan

will

stay on and only switch off again once the temperature of the

DCM120 has op€rator at frllen below a pre-determined level.

So, the hct that the frn is not operating at anytime (and most noticeably to the turn-ur) does not

man

that

$s

emplifia is ftulty itt any way, just that it is op€rating within a t€mp€rature range that does load not need

ftn

cooling for adequate heat dissipation.

If the DCMI2O is operating continually at conservative levels and cmditions,

it

is possible that the cooling frn

will

not switch on at any time during normal operation.

When froper operating, the

ftn

cause air flow from the front to the rear ofthe

DCM120.

Continued noct page3

Amplifier

Status Display

WindoW:

The status display window highliehts the operating conditions of the DCM120.

Please refer to Figure #1 on the back page ofthis instruction sheet with numerical reference as follows: t

High TempefatUfe:

This red

LED glows if the hn has failed and the amplifier has been shut down by its' temperature control circuitry.

If this LED is glowing and the fans have not ftiled, it means that the amplifio is operating in an ambient environme,nt that it naturally too hot for

ftn

cooling to make any difference to the temperature of the amplifier.

Z

PoWef:

This LED glows green

if

AC power is switched on to the DCM120. Note that this

LED does not indicate the pres€nce of a

DC supply voltage tlains

Failure:

The

LED glows red

if

there is a ftilure 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 preseirt then this

LED will not glow.

Output Level

VU

ileter:

A

10 segment

LED w meter is provided to give an indication of the output signal level

of

the DCMI2O from -25 to +3 dB. For normal op€ration the the red zone are

LED's should oscillate in and out of the red zone. tf the

LED's in

lit

continually, then the output level control (or the level of the input signal to the

DCMI2O) should be adjusted to reduce the output level.

Too much output level can cause distortion and possible damage to the cornected speaker system.

Rear Panel

Gonnections

Please refer to Figure #2 on the back page of these instructions with numerical references as follorrys:

3 Pin lEC,

power voltage

AC

level

Mains Power lnlet.

The operating voltage is 240

VAC @ 50Hzor

110

VAC @

60llz.

The

AC is not externally user selectable but is factory prs'set (via transformer selection). The inlet is equipped with an inbuilt AC fuse holder fitted with a

4

Amp slow blow fuse plus one spare fuse. Power consumption is 300

VA.

Please ensure that the mains power cord is disconnected before attempting to check or rephce this fuse.

Output Terminal Strip

.

Reading from left to right these connections are as follows:

Common for low impedance

4 Ohms

8

Ohms

Common for constant voltage systems

70 volts

100 volts

24 VDC Power Connection.

rhe left side red post is the

+

(positive) terminal while the right side black post is the

-

(negative) terminal.

The

DC curr€nt drain is

8 Amps, manimum 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

md

maximum.

DC

Low

Voltage

Fuse

Receptacle.

Access the DC fuse by turning the cap half a tum counter-clockwise with a screwdriver. The value of the fuse mains is l0

Amps Please ensure that the

AC power switch is in the

'ofr

position and that the power cord is disconnected before attenpting to check or replace this fusc

lnput (& Parallel Output)

10K ohms. The

XLR

Signal

Connection.

The input to the

DCM120 is transformer balanced @ pin configuration of both sockas is as follows: pin #l-earth; pin

#2-active (hrgh,

+); pin

#3-active

(low,

-).

The output socket is to allow the original input signal to be fed on to another amplifier. As these two sockets are wired in passive parallel, the failure of any one amplifier will not affect the signal flowing through that amplifia to another amplifier.

tll!||l||tl lllllillil!

llll||l!iiil

--r

-_-

(-'.'

)

-a----------------) c-----------)

-_----------)

----

(.------------

-_f

-

-__ulE

!l+

dl dl

ilIB

oIs

= oI

ol ol cl

c) o

ililil!lr!llil

l||l||ll!tl

ltll||l!tl!

N

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 Common or “-” for low impedance speaker loads (4 or 8 ohms)

4 Positive “+” for 4 ohm speaker loads (use with common)

8 Positive “+” for 8 ohm speaker loads (use with common) DCM120 only

COM Common or “-” for 70v or100v speaker loads

70 Positive “+” for 70v line speaker loads (use with common) DCM120/500 only

100 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:

DCM 120

Mains fuse: 4AT

DC fuse: 10AT (x1)

DCM 250 DCM 500

6.3 AT 10 AT

10AT (x2) 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 (@ 4

Ω 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 = 4

Ω 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

D

C

B

1

X5

3

2

5

4

X1

1

2

3

220R

R1

4

5

X2

1

2

3

R9

0R

X3

1

R10

10k NTC

2

R11

10R

35V

5

6

R13

470R

R12

1K

500R

R2

R4

220R

R5

1K

100R

R3

D1

V1

TIP41C

R8

47k

R6

150R

R7

150R

IRF9520

V2

IC1

78L05

1K

C1

820P

R14

R15

10R

R16

4K7

D3

2

R34

47R

D5

1

X7

R21

1K

IC2

78L05

R22

470R

R23

1K

R24

4K7

2

1

X6

R33

220R

R31

1K

R26

150R

R32

220R

C2

820P

R27

150R

D6

TIP41C

R25

10R

IRF9520

V7

V6

R30

47k

TIP35C

V4

R17

1K

V3

BC556

V9

R41

NOT USED

BC556

R28

1K

TIP35C

R18

R22

R29

R22

V8

500R

R35

R36

100R

TIP35C

R19

1K

V5

R20

R22

D2

+35V

X3

4

3

R37

1K

5

5

4

3

X6

R38

3K3

D4

15V

V11

TIP41C

X4

1

FAN

2

R43

22R

TO X7

R39

1K

R40

R22

V10

D7

R42

10R

TIP35C +35VDC

F2

10A

C3

10000U

+35V

T2

100VAC

70AC

COM

8

4

COM

OHM

BR1

A

1 2 3 4 5 6

T1

D8

40A

S1A F1

4A

+ BATTERY

24V

-

B

240AC IN

S1B

Title

Size

A3

Date:

File:

DCM120 POWER PCB

Number

CD6206-1

8-May-2003

C:\DCM Manuals\CD6206-12.DDB

7

Sheet of

Drawn By:

Revision

1

B

1

SBG

8

A

D

C

3 4 5 6 7 8 1

Microprocessor

2

Mute/Limiter/Drive

VCC VCC

D

C

B

A

VDD

3

4

1

2

IC6

PIC12C509

VDD VSS

GP5

GP4

GP3

GP0

GP1

GP2

8

7

6

5

Pin I/O Desc

7.

6.

5.

4.

3.

2.

GP0-OUT = 1/2VCC CON

GP1-OUT = FAN CON

GP2-OUT = PRTCT/MUTE

GP3-IN = I LIMIT

GP4-IN = FAN SENSE

GP5-IN = THRML SENS

VU Display

*

C35

4u7

R49

10K

X2/3

R41=15K=DCM120/500

R41=12K=DCM 250

1

R48

1K

D31

LK6

0R

IC7

LN3915

R46

1K2

R45

2K7

IC6/P5

5

6

7

8

VCC

2

X3/1

4

R30

10K

3 9

10

2

11

12

13

14

15

16

17

18

1

47K

P2

R29

10K

VCC

R26

10K

D17

D18

D19

D20

D21

D22

D23

D24

D25

D26

V5

BC546

+3DB

0

-3

-6

-9

-12

-15

-18

-21

-25

C5

2u2

R16 2M2

100K

R15

C13

47P

2u2

C10

R35 33K

1

5

6

2

3

7

8

IC3A

SA571

C12

2u2

16

15

14

12

11

10

9

C14

47P

R19

100K

2M2 R27

C17

2u2

C9

.47u

C26

4u7

R25

10K

LK2

R20

10k

C8

100P

R23

10K

IC4B

LM833-B

C33

4u7

C1

2u2

R3

10K

R1

68K

R5

680R

V1

BC639

T1A

X1/1

X1/2

X1/3

R9

5K6 IC2A

LM358

X5

AGND

R24

10k

C6

2u2

R7

100R

X2/1

(N/C)

VCC

V8

BC556

R17

47K

C19

47u

R10

1K

0R

LK3

D1

R12

100R

D2

C3

10u

C23

100P

R21

39k

R8

100R

LK4

0R

X3/2

Battery Indicator

X1/5

X1/4

Power

3

R44

1K

R11

390R

IC2B

LM358

C2

2u2

R4

10K

V2

BC639

X3/3

10k

R22

AGND

IC4A

LM833-A

68K

R2

R6

680R

T1B

X3/5

X3/4

D16

X4/2

X4/6

MAINS

FAIL

Title

Size

A3

Date:

File:

VCC

C32

4u7

R14

22R

GND

V4

BC556

R43

470R

C4

2u2

D10

4

Protect/On Indicator

IC6/P5

R42

1K

PROTECT

IC1

7815

16VDC

D4

C7

100u

VCC

C16

100u

C20

47u

VDD

R32

470K

R13

10K

V9

BC556

IC6/P7

R36

10K

V7

BC546

5

D13

VCC

R51

1K

D27

Thermal Sense

X2/6

(N/C)

VDD

P4

10K

IC6/P2

IC6/P3

X4/1

POWER

C15

100u

R33

22K

IC5

7805

Fan Control

IC6/P6

R56

10K

VDD

C11

22u

Current Limit

VDD

IC6/P4

R31

10k

R34

22K

AGND

8V2

AGND

6

C18

4u7

V3

BC546

P1

2K

X2/5

R55

10K

X4/4

V6

BC546

FAN CONTROL

X2/4

R18

1K

R53

1K

X4/3

X2/2

X4/5

DCM DRIVER

Number

CD6200-1

6-May-2003 Sheet of

C:\Protel Files\CDTRAX\CD6200-14.DDB Drawn By:

7

Revision

D

1 1

SBG

8

D

C

B

A

DCM120 Output Component List

R28

R29

R3

R30

R31

R32

R33

R34

R21

R22

R23

R24

R25

R26

R27

R35

R36

R37

R38

R39

R4

R40

R13

R14

R15

R16

R17

R18

R19

R2

R20

F1

F2

IC1

IC2

R1

R10

R11

R12

D2

D3

D4

D5

D6

D7

D8

Designator Part Type

BR1 KBPC 3506

C1

C2

C3

D1

820P

820P

15,000uF

LED

1N4148

1N4007

1N4148

1N4007

LED

1N4007

40A

470R

1K

10R

4K7

1K

R22

1K

500R

R22

**

T10A

78L05

78L05

220R

NTC 10k

KBPC 3506

1K

1K

R22

100R

47k

1K

220R

220R

47R

1K

470R

1K

4K7

10R

150R

150R

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





Resistor, Metal Oxide 2W



Wire wound resistor 5W


Cermet, preset horizontal






Resistor, Metal Oxide 2W









Thermistor NTC


Cermet, preset horizontal







S1A

S1B

T1

T2

V1

V10

V11

V2

R41

R42

R43

R5

R6

R7

R8

R9

V3

V4

V5

V6

V7

V8

V9

80D

10R

22R

1K

150R

150R

47k

1K

Not Used








Switch

Switch

Switch DPST

Switch DPST

Mains XFMR Mains Transformer

Output XFMR Output transformer

TIP41C

TIP35C

TIP41C

IRF9520

Transistor

Transistor TOP-3

Transistor TO220

Mosfet, Hexfet TO220

BC556

TIP35C

TIP35C

TIP35C

IRF9520

TIP35C

BC556

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

D23

D24

D25

D26

D27

D31

D4

IC1

D17

D18

D19

D2

D20

D21

D22

IC2A

IC2B

IC3

IC4A

IC4B

IC5

IC6

C5

C6

C7

C8

C9

D1

D10

D13

D16

C20

C23

C26

C3

C32

C33

C35

C4

C14

C15

C16

C17

C18

C19

C2

Designator Part Type

C1 2u2

C10

C11

C12

C13

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





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

15K*

12K**

1K

470R

1K

2K7

1K2

1K

10K

10K

10k

470K

22K

22K

33K

10K

10K

680R

1K

1K

10K

10K

680R

100R

100R

5K6

10k

10K

10K

2M2

100K

10K

10K

1K

100K

68K

10k

39k

10k

10K

1K

390R

100R

10K

22R

100K

2M2

47K

0R

0R

0R

0R

2K

47K

10K

68K

R41

R41

R42

R43

R44

R45

R46

R48

R49

R30

R31

R32

R33

R34

R35

R36

R4

R5

R51

R53

R55

R56

R6

R7

R8

R9

R24

R25

R26

R27

R28

R29

R3

R18

R19

R2

R20

R21

R22

R23

R10

R11

R12

R13

R14

R15

R16

R17

LK2

LK3

LK4

LK6

P1

P2

P4

R1

Link, zero ohms

Link, zero ohms

Link, zero ohms

Link, zero ohms

Cermet, preset Horizontal

Potentiometer 16mm

Cermet, preset Horizontal

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

No results