Service manual

MEYER SOUND LABORATORIES MSPN: 05.033.040.01 REV B
TABLE OF CONTENTS
INTRODUCTION 3
Recommended Documentation 4
Pre-Service Checks and Precautions 4
SECTION I: MP/HP/MPW AMPLIFIER MODULES
Flow Chart 5
Amplifier User Panel 6
AC Mains 6
RMS 7
Control Board 7
Power Supply 8
Amplifier Heatsink 9
SECTION II: COMMON FAILURE MODES
Circuit breakers trip on power-up or during use
A) 2-channel versions 9
B) 4-channel versions 11
C) Unit does not power up 14
D) Unit powers up and immediately shuts off 16
E) Unit powers up, but does not pass signal
(unmute) 16
F) Unit powers up,
but active LED does not light and no signal passes 17
G) Unit turns on and off in a cyclical fashion 18
H) Unit turns on,
but no signal passes or signal is intermittent 19
I) Unit hums or has noise 20
J) Unit's output degrades when paired with other uni
ts 21
K) Unit has distorted output 22