Self-Powered Concert Series
Service Manual
MP-2/4 Amplifier
Doc #: 05.033.040.01
Rev.: A
Date: 08/31/98
Page: 2 of 26
© 1998 Meyer Sound Laboratories, Inc. All rights reserved.
TABLE OF CONTENTS
INTRODUCTION 3
SECTION I: MP-2/4 AMPLIFIER SYSTEM DESCRIPTION
A) MP-2 Exploded view diagram and parts list 5
B) MP-4 Exploded view diagram and parts list 6
C) System block diagram. 7
D) Explanation of system block diagram. 9
SECTION II: TROUBLESHOOTING FLOW CHART 12
SECTION III: COMMON FAILURE MODES
A) Circuit breakers trip on power-up or during use-
2-channel versions. 13
4-channel versions. 15
B) Unit does not power up. 19
C) Unit powers up and immediately shuts off. 20
D) Unit powers up, but does not unmute (pass signal) 21
E) Unit powers up, but active LED does not light and signal does not pass. 22
F) Unit turns on and off in a cyclical fashion. 23
G) Unit turns on, but no signal passes or signal is intermittent. 23
H) Unit hums or has noise. 24
I) Unit's output degrades when paired with other units. 25
J) Unit has distorted output. 26
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