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B2/B2R Bass Amplifier
Troubleshooting
In the unlikely event that your B2/B2R should malfunction, take a few minutes to troubleshoot it before you call for ser-
vice. You can save yourself a lot of time and sometimes money by doing it yourself, and often the cure for the problem
is something quite simple.
If the problem isn’t covered above, or if the steps lead you here, then contact your Ampeg dealer for service infor-
mation. Also, you should refer your amp to an authorized service center for servicing if it gets dropped, has liquid spilled
into it, or sustains damage to its power cord (see page 3).
System Block Diagram
NO SOUND
LEDs LIGHT
POOR SOUND
Check bass, cables
Check speaker(s)
Replace speaker(s)
POOR SOUND
LEDs DON'T LIGHT
Check AC outlet
NO SOUND
NO HUM HUM
Listen for hum
NO CHANGE
SOUND OK
SOUND OK
POOR SOUND SOUND OK
SOUND OK
SOUND OK
Check amp controls, check
for signal from bass
Check power cord,
fuse, power switch
Check house fusebox
or circuit breaker
SPEAKER(S) OK,
POOR SOUND
SPEAKER(S)
DEFECTIVE
Check speaker Unplug bass,
touch tip of cable
LOUD HUM
Check inst. pickup
Speaker OK
Replace cable
NO CHANGE
SEE BELOW SEE BELOW
NO POWEROUTLET OK
OK
INPUT
-15dB
-20dB
LIMIT
ON
LIMIT
LED
POWER
AMP
PROTECTION
RELAY
SPEAKON
®
JACK
SPEAKER
OUTPUT
SPEAKER
OUTPUT
POWER
AMP IN
PREAMP
OUT
EFFECTS
RETURN
EFFECTS
SEND
THERMAL
SHUTDOWN,
LOW VOLTAGE,
DC PROTECT
COOLING
FAN
BALANCED
LINE OUT
PRE
POST
EQ
MASTER
GAIN
ON
9 BAND EQ
PEAK LED
BASS TREBLE
ULTRA MID
7


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