Ampeg B1RE manual Troubleshooting, System Block Diagram

B1RE Bass Amplifier

Troubleshooting

In the unlikely event that your B1RE should malfunction, take a few minutes to troubleshoot it before you call for service. You can save yourself a lot of time and sometimes money by doing it yourself, and often the cure for the problem is some- thing quite simple.

NO SOUND

LEDs LIGHT

LEDs DON'T LIGHT

Check amp controls, check

Check AC outlet

for signal from bass

OUTLET OK

NO POWER

NO SOUND

SOUND OK

Check power cord,

Check house fusebox

Listen for hum

fuse, power switch

or circuit breaker

NO HUM

HUM

OK

Check speaker

Unplug bass,

touch tip of cable

Speaker OK

LOUD HUM

NO CHANGE

SOUND OK

Check inst. pickup

Replace cable

SOUND OK

NO CHANGE

SEE BELOW

		POOR SOUND
Check bass, cables
		POOR SOUND		SOUND OK
	Check speaker(s)
	SPEAKER(S) OK,		SPEAKER(S)
	POOR SOUND		DEFECTIVE

Replace speaker(s)

POOR SOUND SOUND OK

SEE BELOW

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.

System Block Diagram

		LIMIT
		LED	PROTECTION
		POWER
			RELAY
		AMP
	PRE	LIMIT	THERMAL
INPUT			SHUTDOWN,
	BAL. OUT		LOW VOLTAGE,
		COOLING	DC PROTECT
	POST
		FAN
	-12dB

PAD	-20dB
	PEAK
	MASTER

GAIN

BASS ULTRA MID TREBLE

SPEAKER

OUTPUT

SPEAKER

OUTPUT

POWER

AMP IN

PREAMP

OUT

EFFECTS

LOOP

RETURN

EFFECTS

LOOP

SEND

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