Rolls MX310 quick start Introduction, Inspection, Description, Schematic

1 2 3

PHNT PWR ON=DOWN LOW CUT ON=UP

P L P L P L

INTRODUCTION

Thank you for your purchase of the MX310. This unit is designed and manufactured to mix three microphones together and send their com- bined signals out to a single transformer-balanced XLR output. The indi- vidually switchable phantom power and low-cut switches provide the final touches which make the MX310 a valuable tool for any sound reinforce- ment, musical, recording, or install application.

INSPECTION

1. Unpack and Inspect the MX310 package.

Your MX310 was carefully packed at the factory in a protective carton. Nonetheless, be sure to examine the unit and the carton for any signs of damage that may have occurred during shipping. 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. For warranty registration go to our website: WWW.ROLLS.COM

DESCRIPTION

REAR PANEL

Mic Input: 1 - 3: XLR balanced inputs for connection to any standard dynamic or condenser microphone.

Output: Transformer balanced XLR output jack for connection to the next device in the signal chain such as a mixer, signal processor or amplifier. MIC/LINE Switch: This switch adjusts the output XLR level from Mic or Line level. This switch does not effect the Aux/Headphone Output.

FRONT PANEL

Mic Level 1 - 3: These controls adjust the level of the corresponding Mic channel. The level varies from -infinity (off) to +60 dB of gain (typical). Phone/Aux: 1/8" TRS jack which may be connected to a pair of head- phones for personal monitoring, or to an unbalanced input of a signal processor or amplifier.

Power LED: Indicates the MX310 is on.

Clip LED: Indicates that clipping is about to occur or occurring in the MX310 circuitry. This LED begins to light 3dB below actual circuit clip- ping.

Located on the right side of the unit is the +12 VDC power jack for connection to the Rolls PS27 +12 VDC (outside of the ring is positive) external power supply.

On the left side are the Phantom Power and Low- Cut switches.

As shown here, under each number is a P indi- cating Phantom Power, and an L which indicates Low-Cut.

When the P switch is DOWN, the phantom power is ON, when it is UP, the phantom power is OFF.When the L switch is UP, the low-cut is ON, when it is DOWN, the low-cut is OFF.

SCHEMATIC

PC

Rev:

41310

of 1

M

1

OUT

J6 XLR

1N4001 1IN 9-15 VDC

Date: 22 April 2010Sheet

LINE/HDPHONE

2

2

SW2B

1

R19

Rolls Corporation

5968 S 350 W Murray, Utah 84107

MIC MIXER

J5 JK3.5ST

Output Level

DPDT

5

DPDT

6

SW2A

4

HI

3

LOW R32 330

C18

3

47U

R22

100

1

4556 R31

4.7K

D1J4 2 3

JAPDC

8019053263- -

MORMICSCH3

Size: DocumentNumber:

FXa MX310.SCH

1

R33

4.7K

R23

10K

U3A

4

C17 C23

1K UF 503

MX310

R34 100

C16 27PF

R35

10K

2

3

+VB

330

Title

C19

7

47U

R42 2N3904

Q2

VPHAN

LDRG +V

R29

18K

C20

47U

C21 27PF

8

U3B

C22

47U

R40

100K+V

6

1K 5 4556

+VB

CR4

1N4148

47K

+V

R24

2K

CLIP D3

Q1 2N3904

R28

22K

R41

+VB

R25

33K

R26

10K

2

3

R21

10K

4560

U1A

4

+VB

+VB

R7

10K

R14

10K

+VB

1

+VB

D2

P1

P100K

SW1B

SWDIP-6

27 11

CR1

1N4148

P2

P100K

SW1D SWDIP-6

41 9

CR2

1N4148

P3

P100K

SW1F

SW DIP-6

67 7

CR3

1N4148

R27 3.3K

LDRG

C5 503

C10 503

C15 503

+V

4560

U2B

R6

20K 1%

4560

R13

20K 1%

4560

U1B

R20

20K 1%

C3 470PF +V

8

C8 470PF

U2A

4

C13 470PF +V

8

+VB

5

6

C4 470PF

+VB

3

2

C9

470PF

+VB

5

6

C14

470PF

R5

20K 1%

332 1%

332 1%

R12

20K 1%

332 1%

332 1%

R30

20K 1%

10U

332 1%

332 1%

VPHAN

R3 R4

VPHAN

10

R10 R11

VPHAN

R17 R18

112

10U

C26

C25 10U

10U C6

C7 10U

58

C11

C30 10U

C24

1U

SW DIP-6

10U

C2

U1C

SW DIP-6

10U

10U

SW DIP-6

10U

10U

R37 10K

10U

R16 4.99K 1%

C12

R36 10K

U1A

R2 4.99K1%

C1

3

F PC

3

R9 4.99K1%

C27

3

C28

F PC

U1E

C29

3

F PC

4.99K 1%

XLR

XLR

XLR

J7 JK3.5ST

AUX IN

R1

2

1

R8

4.99K 1%

2

1

R15

4.99K 1%

2

CH3

1

CH 1

J1

CH 2

J2

J3