JEFF ROWLAND Model 8T User Manual

Basic Troubleshooting
A
summary of fault conditions, their causes and remedies, are listed below.
The Model 8T/Ti Amplifier can produce high power levels which, without well designed protection circuitry, could damage loudspeakers. Therefore, most fault
conditions which may occur during use will be indicated by the Model 8T/Ti reverting to a standby condition.
JRDG = Jeff Rowland Design Group, Inc.
Condition
FRONT PANEL STANDBY/POWER button lamp
does not illuminate after pressing, although the
Amplifier operates normally.
FRONT PANEL STANDBY/POWER button lamp
does not illuminate after pressing, and Amplifier
does not operate normally.
FRONT PANEL STANDBY/POWER button reverts
to standby condition during listening but can be
returned to operational condition.
Cause
Light bulb defective.
FRONT PANEL LAMP switch (rear panel) in OFF
position.
Incorrect power connections or circuit breaker
positions on Amplifier.
Abnormal operation of Model 8T/Ti Amplifier
internal circuitry.
Excessive sub-sonic signals produced by source
components.
Severe clipping of Amplifier circuitry under
intermittent overload conditions.
Remedy
Remove STANDBY/POWER button from front
panel and replace bulb located under button. Use
replacement bulb kit and instructions supplied by
JRDG.
Change switch position.
Review Installation/Rear Panel Power Connections
section.
Consult dealer or JRDG.
Repair or replace source component
(preamplifier). Identify and correct abnormal
conditions such as low frequency rumble and/or
acoustic feedback caused by phono playback
components (if applicable).
Reduce volume slightly or use higher efficiency
loudspeakers.

JEFF ROWLAND Model 8T Specifications

General

Brand	JEFF ROWLAND
Model	Model 8T
Category	Amplifier
Language	English