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Ampeg SVT-VR - Important information about tubes; A brief history of the tube; Tube types and usage

Ampeg SVT-VR
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11
Troubleshooting
In the unlikely event that your SVT-VR should malfunction, take a few minutes to troubleshoot it before you call for
service. You can save yourself time and money by doing it yourself, and often 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 informa-
tion. Also, you should refer your amp to an authorized service center if it gets dropped, has liquid spilled into it, or sustains
damage to its power cord. Regular cleaning and maintenance by your local Service Center will help extend the useful life
of the amplifier.
System Block Diagram
SVT-VR Bass Amplifier
GND
LIFT
PRE
POST
TRANSFORMER
BAL. OUT
BRIGHT
TWO
NORMAL
MID-
RANGE
PREAMP
OUT
POWER
AMP IN
SLAVE
OUT
123
BRIGHT
ONE
NORMAL
VOLUME
ULTRA
HIGH
ULTRA
LOW
TREBLEBASS
LEVEL
VOLUME
ULTRA
HIGH
ULTRA
LOW
TREBLEBASS
BALANCE
(SPEAKO
N
JACK)
SPEAKERS
1+
2+
1- 2-
POWER
AMP
BIAS
1
BIAS
2
4 OHM
2 OHM

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