Rolls RA2100b Introduction, Inspection, Installation, Schematic, Bridging, Fault Protection

Models: RA2100b

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INTRODUCTION

Thank you for your purchase of the ROLLS RA2100b Power Amplifier. The RA2100b is a stereo 100W/channel RMS power amplifier in a standard 2 rack space format. It is intended for professional audio and distributed musical applica- tions. The unit features 100 Watts per channel RMS into four ohms, 85 Watts per channel into eight ohms, and for the contractor - 70 Volts / eight ohms.

The unit also features MOSFET drivers in a voltage and current gain circuit, a one-second input turn-on delay, and LED power output meters. The RA2100b will drive 25 Volt speaker lines directly from each channel, or 70 Volt lines bridged.

INSPECTION

1. Unpack and inspect the RA2100b box and package.

If obvious physical damage is noticed, contact the carrier immediately to make a damage claim. We suggest saving the shipping carton and packing materials for safely transporting the unit in the future.

2. Please complete the Warranty Registration Card and return it to the factory.

INSTALLATION

Connect the power cord to an AC power source, connect the input to the signal source and to the RA2100b via the RCA or 1/4” input jacks. Speakers may be connected by using the 1/4” output jacks, or the dual banana posts. Turn the Volume controls fully counterclockwise (off), and turn on the power switch, the power LED should light. With the program material running, slowly increase the Volume controls until the desired level of sound is present. There is a one second turn-on delay provided to prevent possible speaker damage in case all equipment is on a signal power strip.

whenever the output stage is called upon for too much power, it may also be fooled by impedances lower than four ohms - which may cause the output stage to overheat and burn up the MOSFETs.

Since the RA2100b is convection cooled, the unit radiates heat from the rear panel and , depending on the load demand, it may become very hot if drawn upon heavily.

DRIVING 25 OR 70 VOLT LINES

The RA2100b will drive 25 or 70 Volt lines directly with no added transformers when used the following way:

Each channel will drive 25 volt lines directly.

A single 70 volt line may be driven when the RA2100b is in Bridged mode. In order to drive two 70 volt lines, two 8 ohms to 70 Volt conversion transformers will be needed.

SCHEMATIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

33K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V+

 

CHANNEL1

 

 

 

 

 

 

 

 

 

 

R9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LoCut

 

 

 

10K

 

 

 

 

 

 

 

 

D4

D5

D6

 

R102

 

R1

C1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10K

.001

2

1458

 

 

 

 

 

R8

 

C5

 

 

V+

 

 

 

 

 

 

 

 

 

Q11 4.7K

 

J1

 

 

 

 

 

 

 

470

 

 

 

 

 

 

 

 

1N41481N4148

1N4148

 

2N3904

 

 

 

 

 

1

1

2

3

 

 

 

 

 

F1

R18

.1

 

 

Q6

R35

 

 

 

3

U1A

 

 

 

 

 

Vr+

 

R21

 

 

 

 

 

 

 

 

 

 

 

P1

 

 

Vr+

50PF

R11

 

6A

 

R19

 

10K

Q5 IRF9540

 

 

 

10K

D7

 

R2

 

 

 

 

 

 

P100K

 

 

8

 

 

 

 

R20

 

 

 

 

 

 

LDRY

 

10K

C2

 

4

 

 

C3

 

 

 

 

10K

 

 

 

470

1K

2N3904

 

 

 

 

 

1

470PF

 

 

 

.01

R6

 

 

1458

 

 

 

Q3

 

 

R24

 

 

 

 

 

 

Vr-

 

 

 

6

R101K

 

 

 

 

 

 

 

R36

 

 

 

 

 

 

 

 

 

1K

 

 

7

 

 

 

 

 

 

 

 

 

 

2N3904

 

 

 

 

R4

 

 

 

 

 

5

U1B

 

 

2N3906

D1 1N4148

 

51

 

 

10K

R37

 

 

 

 

33K

 

 

 

 

 

 

 

 

 

 

 

 

R22

 

 

 

 

 

100K

Q12

 

 

R3

 

 

 

 

 

 

C4

 

 

 

 

 

 

 

 

R23

 

 

 

 

 

D8

 

 

 

 

 

 

 

Q1

R7

 

 

 

 

 

 

 

2K

22K

 

 

 

 

 

LDRG

 

 

1K

 

 

 

 

 

120PF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Vr+

 

J113

 

100K

 

 

 

 

 

 

 

 

Q4

 

 

 

R38

 

 

5

J4A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MPSA06

 

 

 

10K

 

2N3904

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R39

 

RCAX2

 

 

 

 

 

C17

 

R103

 

 

 

R12

 

 

R16

 

 

 

 

 

 

 

Q13

 

1

 

 

 

 

 

1U

 

1M

 

 

4

6.8K

 

 

47K

D2

 

 

C6

 

 

 

100K

D9

 

 

 

 

 

 

 

 

 

 

 

H1D H?A

P2

 

 

 

 

 

R25

 

 

 

 

LDRG

 

 

 

 

 

 

 

 

 

 

 

Q2

 

 

1N4148

330

.002

 

H4A

 

R40

 

 

3

 

 

 

 

 

 

 

 

1

 

HCN2

500

 

 

 

 

 

 

 

1

H4B

 

10K

 

32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R105

 

 

D25

 

 

2

2N3904

 

 

 

 

R26

 

2

 

 

 

 

 

 

 

 

 

 

 

 

R13

 

 

 

 

 

 

HD4

 

R41

Q14

 

 

 

 

1M

 

 

 

1N4148

 

3

 

1

R14

 

 

 

 

330

 

 

H4C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1K

150

 

 

 

 

 

R27

3

HD4

 

100K

D10

 

J4B

 

 

 

 

 

 

 

R104

1

SW2A

 

 

 

 

 

 

 

 

100

 

H4D

 

 

LDRR

 

RCAX2

 

 

 

 

 

 

 

1M

DPDT

 

 

 

 

 

 

 

 

 

4

HD4

 

2N3904

100

2

 

 

 

 

 

 

 

 

H?A

 

 

 

R15

 

R17

 

 

Q8

 

 

 

R42

 

 

 

 

 

 

 

Vr-

 

 

 

 

HCN2

 

 

 

10K

 

 

 

 

MPSA56

 

Q10

HD4

33K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

47K

 

 

 

 

 

 

 

 

 

4A 120V - 2A 230 V

OUTPUT 1

OUTPUT 2

-

+

MAINS POWER

+

WARNING

For continued protection against risk of fire, replace only with same type and rating of fuse.

-

RISQUE DE CHOC - NE PAS ENLEVER

OUTPUT 1

OUTPUT 2

SERIAL NUMBER

BRIDGE NORMAL

CORPORATION

MADE IN U.S.A.

 

 

 

CHANNEL 2 INPUT

 

 

 

 

 

 

CAUTION

 

 

 

 

 

 

 

 

 

 

 

TO REDUCE THE RISK OF ELECTRIC

 

 

 

 

 

 

 

 

 

 

 

SHOCK DO NOT NOT REMOVE LID. NO

 

 

 

 

 

 

 

 

 

 

 

USER SERVICABLE PARTS INSIDE.

 

 

 

 

 

 

 

 

 

 

 

REFER SERVICING TO QUALIFIED

 

 

 

 

 

 

 

 

 

 

 

SERVICE PERSONNEL

 

 

 

 

 

 

 

 

 

 

 

WARNING:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To reduce the risk of electric

 

 

 

 

 

 

 

 

 

 

 

shock or fire do not expose

 

 

 

 

 

 

 

 

 

 

 

this device to rain or moisture.

 

 

 

 

 

CHANNEL 1 INPUT

3

 

 

 

 

 

 

 

 

 

 

 

H1E

 

 

 

 

 

 

 

 

 

R28

R29

 

IRF540

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D3

 

 

 

 

 

 

 

 

 

R47

 

 

 

 

 

 

 

5

 

 

 

 

Vr-

 

 

 

2K

22K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R51

R52

 

 

 

1N4148

R34

 

 

 

 

 

 

 

 

33K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10K

10K

 

 

 

Q7

 

 

 

 

 

 

 

 

 

 

R45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CHANNEL2

1K

 

 

 

 

 

 

Q15

 

R50

 

 

 

 

 

 

 

2N3904

R30 470

 

 

51

 

 

 

 

 

 

 

 

 

 

LoCut J113

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R43

 

C7

 

 

 

 

 

 

 

470

 

 

C11

 

 

 

F2

 

 

R32

 

Q9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1K

 

2N3906

 

 

 

 

 

10K

 

.001

 

1458

 

 

 

 

 

 

 

 

50PF

 

 

 

 

 

 

 

 

 

HEATSINK

 

 

 

J2

 

 

2

 

 

 

 

 

 

 

 

 

 

 

Vr+

 

 

R31

 

 

 

 

 

 

 

 

 

R44

 

U2A

1

1

2

3

 

 

 

 

 

Vr+

 

 

 

 

6A

 

R33

 

D14 D15

D16

 

V+

 

 

3

 

 

 

 

 

 

8

 

R54

 

 

V-

.1

 

 

 

1N4148 1N4148

 

 

 

 

 

10K

 

 

 

 

 

 

 

 

 

 

 

1458

10K

 

 

 

 

 

10K

 

1N4148

 

R100

 

 

 

 

 

 

 

C9

 

 

 

 

 

6

 

 

7

 

 

 

 

 

 

 

 

 

 

 

4.7K

 

 

C8

 

4

 

 

 

 

 

 

 

5

U2B

V+

 

 

 

 

 

 

 

 

 

 

Q25

 

 

 

 

 

 

 

.01

 

1

 

2

 

 

 

R53

 

 

 

 

 

 

 

 

 

 

R78

 

 

 

 

 

Vr-

 

 

P101

 

 

H1A

H1B

 

 

 

 

 

 

 

R61 .1

1N4148

R65 1K

 

 

 

10K

 

 

 

470PF

 

R46

 

 

 

R48

 

 

R49

 

1K

 

 

 

 

 

 

D17

 

 

 

 

 

 

P100K

 

1K

H?A

 

H?A

 

100K

 

 

 

F3

2N3906

 

 

 

R67

 

Q20

 

2N3904

LDRY

 

 

 

 

33K

 

 

 

 

HCN2

HCN2

 

 

 

6A

D11

 

R66

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q17

 

 

10K

 

 

 

 

 

 

 

 

 

D26

 

 

 

 

SW2B

C10

 

 

 

 

 

 

R62

R63

 

22K

 

IRF9540

 

 

1

 

 

 

 

 

 

 

 

 

 

DPDT

120PF

 

 

R55

 

 

 

470

2K

 

 

 

 

 

R79

 

Q26

R87

R88

Vr+

 

1N4148

 

 

1

4

1

5

 

 

6.8K

 

 

 

 

 

 

 

 

R68

 

10K

R80

 

 

 

 

NORMAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100K

 

47K

47K

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

Q18

 

Q19

 

 

 

D18

 

 

 

R90 10K

D24

 

 

 

BRIDGE

 

 

P102

 

 

 

 

 

 

MPSA06

2N3904

51

 

 

2N3904

LDRG

 

 

 

 

 

 

 

 

500

 

Q16

 

 

R59

R64

 

 

 

 

 

 

 

 

 

 

 

 

LDRR

 

SETP2ANDP102FOR1-2mVACROSSR11ANDR111

2N3904

 

 

47K

 

 

 

 

 

R81

 

5

 

 

 

PROTECT

 

 

 

 

 

 

330

 

 

C12

.002

 

10K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R56

 

R57

 

 

 

 

 

 

 

 

 

 

R82

Q27

 

 

 

R91

 

 

 

 

 

 

 

 

 

 

1K

 

150

 

 

 

 

 

 

 

 

 

 

100K

 

 

 

 

 

Q30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D19

 

Q29

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R69

 

R70

 

 

 

 

BRIDGING

To bridge the RA2100b, first ensure the power is off. Move the Bridging switch to the “Bridge” position. The Channel 1 Volume control will be the master volume, Channel two Volume is inactive.

Connect the input to Channel 1 input, then connect the load (speakers) to the two positive (red) banana jacks. Make no connections to the black posts. The level meters will both light, and the output power into 8 ohms is the sum of the LEDs that light.

FAULT PROTECTION

The fault protection in the RA2100b limits the current to the output stage in the faulted channel and turns on all the LEDs in that channel. This mode is entered

 

2N3904

1K

2N3904

 

 

 

 

R58

 

 

 

 

 

 

 

 

 

 

LDRG

 

 

 

 

 

 

 

 

 

 

 

 

 

330

100

Q23

R83

2N3904

 

 

 

 

 

 

 

 

 

 

 

10K

 

 

 

 

 

 

 

32

 

 

 

R89

 

 

 

 

 

 

 

 

 

 

R60

 

Q21

 

IRF540

10K

 

Q28

 

 

R101

1K

 

R92

 

 

V+

 

 

 

 

 

47K

 

MPSA56

R75

 

R84

 

 

 

 

 

10K

 

 

 

 

Vr-

 

 

 

 

 

 

51

 

 

 

 

 

t

 

 

 

 

 

R98

1K

Q31

 

 

 

 

R71

 

 

100K

D20

 

 

 

 

 

 

 

 

 

 

 

Vr+

 

 

2K

 

 

 

 

 

 

 

THERMISTOR

Vr-

 

 

 

 

 

 

 

 

 

R73

 

 

2N3904

LDRR

 

 

 

 

 

 

 

C13

 

R99

2N3904

 

 

 

D12

 

 

100

 

 

 

 

 

 

 

 

 

 

 

22K

 

 

 

 

 

 

 

 

 

 

 

6800UFR94

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SW1

 

 

 

 

22K

 

D22

 

C16

 

 

1N4148

 

HEATSINK

 

R85

 

 

 

 

4AMPF5

 

 

C18

 

D2110K

 

 

 

 

 

 

 

 

 

 

 

T1

4

 

 

 

10U

 

 

R72

R74

Q22

 

33K

 

 

 

 

 

 

 

 

C14

RED

ZD12V

 

 

 

10K

2N3906

 

 

 

 

 

 

 

 

 

 

503

 

 

 

 

1K

 

D13

 

 

 

 

 

J3

SW SPST

CP8010

 

R93 6800UF

R95

 

 

 

 

 

 

 

V+

 

 

 

 

 

 

 

 

1K

 

-12V

 

 

 

 

 

1N4148

 

 

 

 

 

 

2

BR1

1

3.3K

 

Q32 Vr-

 

 

 

Q24

 

 

 

 

 

ROLLS CORPORATION

 

 

 

 

 

 

 

 

R96

 

2N3906

 

 

 

R76470

 

 

 

 

 

 

 

 

 

 

 

V-

 

 

 

 

 

 

2N3904

 

 

 

 

 

5143 South Main Street

 

 

 

 

 

 

 

 

 

 

D23

 

 

 

 

 

 

 

 

 

Salt Lake City, UT 84107

 

 

 

 

 

3

 

 

10K

 

 

 

 

 

 

 

 

 

 

Title RA200 POWER AMP BOARD

 

 

 

 

 

 

 

C15

 

ZD12V

 

 

LASTR72C15

F4

 

R77.1

 

 

Rev:

PLUGACMALE

 

 

 

 

 

10U

 

12V

 

 

V-

6A

 

 

 

 

Size:

Document Number:

RA200.SCH

MAINSTRANSFORMER

 

 

 

 

 

 

 

 

 

 

 

 

Rb

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Date: 28-Jun-1999

Sheet 1 of 1

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Rolls RA2100b owner manual Introduction, Inspection, Installation, Schematic, Bridging, Fault Protection

RA2100b specifications

The Rolls RA2100B represents a remarkable advancement in the field of aerospace propulsion, showcasing an innovative design tailored for modern aircraft. As a high-performance turbofan engine, the RA2100B caters to a niche market of regional jets and smaller commercial applications. This engine is a testament to Rolls-Royce's commitment to engineering excellence, efficiency, and sustainability.

One of the defining features of the RA2100B is its impressive thrust-to-weight ratio, which allows it to generate substantial thrust while maintaining a lightweight design. This attribute significantly enhances aircraft performance, making takeoff and landing phases more efficient. The engine typically delivers thrust in the range of 18,000 to 24,000 pounds, accommodating the operational needs of various regional aircraft.

The RA2100B integrates advanced technologies that enhance fuel efficiency and reduce emissions, addressing contemporary environmental concerns. The engine employs a high bypass ratio design, which enables it to optimize airflow and combustion processes, resulting in lower fuel consumption. Additionally, the incorporation of next-generation materials, such as titanium and advanced composites, contributes to weight reduction while ensuring durability and resistance to high temperatures.

Another critical aspect of the RA2100B is its cutting-edge noise reduction technology. Using innovative sound-attenuating designs, such as serrated edges on engine components and advanced fan blade geometries, the RA2100B minimizes noise pollution, fulfilling regulatory requirements and improving passenger comfort. This focus on noise reduction makes it particularly suitable for operation in urban environments where noise restrictions are stringent.

Reliability is another hallmark of the RA2100B. Rolls-Royce employs rigorous testing and quality assurance processes throughout the engine's production and maintenance phases, ensuring that operators can depend on its performance. Moreover, the engine is supported by a robust maintenance program, allowing operators to maximize uptime and reduce operating costs.

In summary, the Rolls RA2100B turbofan engine combines efficiency, power, and environmental responsibility, making it an ideal choice for regional aviation. Its advanced technologies, including a high bypass ratio, innovative materials, and noise reduction features, embody Rolls-Royce's mission to lead the aerospace industry into a sustainable future. As demand for regional air travel grows, the RA2100B is poised to play a pivotal role in shaping the next generation of aircraft propulsion.