Rolls PA202 User Manual

Bridge or Stereo Operation:

WARNING:

WARNING:

WARNING:

The bridge - stereo function of the PA202 is a way of converting the unit
from two channels at 20 watts each to one channel at 40 watts. To do
this depress the CONFIGURATION SWITCH and follow the silk screen­ing on the chassis for the mono-bridge operation.

OUTPUTS

-

+-+

STEREO:

-

BRIDGE:

LIMITER

off

on

WARNING:

+

-

VDC

OUTPUTS:

RISQUE DE CHOC - NE PAS ENLEVER

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

WARNING:

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER.
NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL

INPUTS

BRIDGE INPUTS

RIGHT

LEFT

-+

-+

THE MINIMUM SPEAKER IMPEDANCE FOR

LEFT

RIGHT

PWR

+

SERIAL NUMBER

RIGHT

BRIDGE

PA202

Mini Two Channel Amp

20 X 20 watts

CONFIGURATION
BRIDGE:
STEREO:

CHANNEL VOLUME

RIGHT

LEFT

BRIDGE

LEFT

STEREO (2 CHANNEL OPERATION) IS 4 OHMS EACH.

WARNING: THE MINIMUM SPEAKER IMPEDANCE FOR

MONO/BRIDGE IS 8 OHMS.

IF YOU CONNECT AND USE THE PA202 WITH A LOWER
SPEAKER IMPEDANCE THAN LISTED ABOVE YOU
WILL DAMAGE THE UNIT AND POSSIBLY OTHER
EQUIPMENT THAT IS CONNECTED TO THE PA202.

WARNING: DO NOT GROUND THE SPEAKER OUTPUT

TERMINALS. THE SPEAKER TERMINALS MAY NOT BE
AT GROUND POTENTIAL.

Salt Lake City, Utah

3/09

6

7 5 8 8 9 0 2 0 2 0

PA202

Mini 20 + 20 watt

Power Amplifi er

LEFT

PA202

20 X 20 watts

RIGHT

BRIDGE

LIMITER

off

on

OUTPUTS:

RISQUE DE CHOC - NE PAS ENLEVER

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

WARNING:

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER.

NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL

LEFT

-+ -+

INPUTS

BRIDGE INPUTS

RIGHT

PWR

RIGHT

CHANNEL VOLUME

LEFT

LEFT

Mini Two Channel Amp

CONFIGURATION

BIRDGE:

STEREO:

RIGHT

BRIDGE

PA202

Mini Power Amplifi er

• RCA Inputs

• Dual volume controls

• Screw terminal in and out

• Low noise, effi cient operation

• Small compact size

• Class D high effi ciency amp

The PA202 is a very compact 20 + 20 watt high effi ciency amp
with barrier strip terminals for the balanced input and speaker out­puts. The unit is perfect for small speakers in small environments.
Great for in ceiling and projector applications where small size is
needed along with class D low radiated heat locations.

Operation guide

5

INTRODUCTION

Thank you for your purchase of the PA202 mini 20 X 20 watt Power Am­plifi er. The unit for powering speakers in small environments.

NOTE: THIS MANUAL ASSUMES THE USER HAS A WORKING KNOWL­EDGE OF AUDIO ELECTRONICS, BALANCED AND UNBALANCED CON­NECTIONS, AND PROPER SIGNAL LEVEL SETTING.

INSPECTION / WARRANTY

1. Unpack and inspect the PA202 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 visit our web site at www.rolls.com and click on the Register Your War­ranty Here button, or complete the Warranty Registration Card and return it to the
factory.

DESCRIPTION

REAR PANEL

SPEAKER OUTPUT: Barrier screw terminals.
VDC: For connection to the power supply.

BRIDGE:

STEREO:

OUTPUTS

+

-

+-+

-

SERIAL NUMBER

VDC

-

+

FRONT PANEL

CHANNEL VOLUME: Adjusts the level of signal from the Line Input to
the Line/Power and Speaker outputs.
INPUTS: RCA line level inputs and balanced barrier screw terminals
BRIDGE/MONO SWITCH: For selecting the operation of stereo or mono
bridge input and output operation.
LIMITER SWITCH: For selecting on or off of the limiter circuit.

BRIDGE INPUTS

RIGHT

LEFT

-+ -+

RIGHT

PWR

CHANNEL VOLUME

LEFT

LEFT

RIGHT

BRIDGE

LIMITER

off

on

CONNECTION / OPERATION

Connect input sources such as CD player, DVD player or projector out­puts to the inputs of the PA202.
Select the bridge or stereo function. The PA202 is shipped from the
factory in stereo mode. To select bridge mode push in the switch until it
locks into position.
Connect the outputs from the PA202 to your speakers. The stereo and
bridge outputs are labeled on the silk screening of the unit.
We recommend selecting the LIMITER ON function, but the circuit may
be disabled by selecting the OFF position.

The holes in the back and
side of the PA202 are for the
attachment of a zip tie (not
included). For power cord
strain relief as needed.

LIMITER EXPLANATION:

The limiter is a function that will not allow very loud signals to pass
through the PA202 by limiting their volume temporarily to a normal level,
preventing damage to the speakers or the unit its self. It is important to
note that the limiter utilizes a circuit that decreases the amount of very
loud signals it does not cut out all potentially loud signals. Proper instal­lation and setup is crucial. If you are experiencing distortion turning the
Limiter on may help but it is not intended for total dynamics control. Its
primary function is to help prevent one time very loud signals like drop­ping a microphone or loud program material that is temporary.

SPECIFICATIONS
Line Input Impedance: 47K Ohms
Power Output: 20 Watts X 2 (8 Ohms)
Voltage Gain: 32 dB
Maximum Supply Voltage: 30 VDC
THD: .05% typical
EIN: 3 mV
Effi ciency: 85%
Input Sensitivity: 28 mV
Bandwidth: 20Hz - 25 kHz
Size: 6" x 3.5" x 1.5"
Weight: 1 lb.

SCHEMATIC

HD1

1

PORT +

LEFT

2

PORT -

3

GND

LINE INS

RIGHT

PORT +

PORT -

HDR5X200

4

5

J1B

RCAX2

4

J1A

RCAX2

2

Rolls 24VDC adapter

J2

JAPDC

+VB

470PF

C3

+V

8

10K 1%
R3

4560

5

R1
C1
1U

C2

R2
10K 1%

1U

3

R7
C7
1U

C8

SW2B

4

1U

6

DPDT

1

BRIDGE

1
3
2

7

U2B

10K 1%

6

P2

+VB

P100K
R4
10K 1%

C4

470PF

+VB

SW2A

3

470PF

C9

10K 1%
R44

3

10K 1%

2

R8

5

10K 1%

Q1

2N3904

VCC

F1
FUSE1

D6

1N400X

2

1

DPDT

P100K

4560

1

U2A

P1

+VB

4

R9
10K 1%

C10

470PF

SW1

D7

3

1

2

+V

R18
10K

D5

BLUE

1N5242

SPST

47U

C24

LIMIT ON

R16

+VB

47K

R59

R17

18K

22K
C25
47U

C5

R5
10K

1uF

C6

1uF

R10
10K

+VB

4

3

4

3

U3

U4

VTL5C3

VTL5C3

D1

1

2

1

2

1N4148

1N4148D3

D4

330 R15

1N5231b

D2

1N5231b

C11
1uF

VCC

VCC

C12
1uF

330R13

U1

4

LIN

5

RIN

6

BYPASS

7

AGND

8

AGND

14

GAIN1

15

GAIN0

9

VCLAMP

2

SD

3

MUTE

TPA3122D2N

PINS 14, 15 SET TO 32dB

BSL

LOUT
PGNDL
PGNDR

ROUT

BSR

AVCC

AVCC

PVCCR
PVCCL

use 4ec2 pattern

C14

L1

18

22uH

.22uF

19
20
11
12

C13

L2

13

22uH

.22uF

16
17

10
1

VCC VCC VCC VCC

C18

C17

470U

.1uF

C26
.68uF

C27
.68uF

C19
470U

C15
470U

R6

4.7K

R11

4.7K

C16

470U

C20

C21

C22

.1uF

.1uF

.1uF

Rolls Corporation

5968 S 350 W

Murray Utah 84107

Title

PA202 20W STER EO AMP

Size: Document Number:

FXa

Date:

28 February 2009

SPEAKER OUT

SCREW TERMINALS

HD2

1

PORT +

2

PORT -

3

PORT -

4

PORT +

HDR4X200

PA202.SCH 2199

Sheet of

LEFT

RIGHT

1

Rev:

1