Mach 1 Acoustics HR-824 Schematic

*

*

Note: The only difference between the

*

Rev A and Rev B parts are that VR5, R73
and R46 may have different values on the
Rev A board. See the parts list for details.
(There is no need to change to the new
parts if you have a Rev A board).

©1998, ©1999 Mackie Designs Inc. All Rights Reserved

*

HR824 SCHEMATIC REV A and B sheet 1 of 2

A-1

A-2

HR824 SCHEMATIC REV A and B sheet 2 of 2

©1998, ©1999 Mackie Designs Inc. All Rights Reserved

310-029-00

NPN

2SD1264A

Q1

310-029-00

NPN

2SD1264A

Q2

310-025-00

NPN

2SD1047

Q5

310-037-00

NPN

MJE340

Q6

310-024-00

PNP

2SB817

Q7

310-028-00

PNP

2SB940A

Q9

b e b e

b e

e b

b e

b e

J2

1/4" STEREO JACK

400-166-00

R184

J3

XLR (FEMALE)

CONNECTOR

400-131-00

SW2

e b e b

Q30

2SB940A

PNP

310-028-00

Q32

2SB940A

PNP

310-028-00

©1998, ©1999 Mackie Designs Inc. All Rights Reserved

e b e b

Q35

2SB817

PNP

310-024-00

b e

Q36

MJE340

NPN

310-037-00

Q37

2SD1047

NPN

310-025-00

e b

Q41

2SD1264A

NPN

310-029-00

TH1

67F070

THERMOSTAT

500-026-00

IEC CONNECTOR

SW5 SW3 SW4

HR824 BOARD REV A

J10

400-132-00

A-3

Component

Bottom of

side of

board

board

A-4

HR824 BOARD REV A

©1998, ©1999 Mackie Designs Inc. All Rights Reserved