JEFF ROWLAND Model 8T Owner's Manual page 16

Condition
RIGHT AND/OR LEFT CHANNEL CIRCUIT
BREAKER switches off occasionally during
listening.
RIGHT AND/OR LEFT CHANNEL CIRCUIT
BREAKER cannot be switched on (when
loudspeakers are not connected).
AC MAINS CIRCUIT BREAKER (rear panel)
switches off or will not remain on.
50/60 Hz hum noise in loudspeakers.
50/60 Hz buzz noise in loudspeakers.
High frequency, random or scratching
noise in loudspeakers.
Cause
Excessive load currents drawn by loudspeaker(s)
and/or excessive low-frequency program material.
Intermittent short-circuit on Amplifier PARALLEL
OUTPUTS.
Abnormal operation of Model 8T/Ti Amplifier
internal circuitry.
AC mains service voltage too high for Amplifier.
Abnormal operation of Amplifier internal circuitry.
Sensitive source component(s) located too close to
Amplifier.
Ground loop condition created between
components in system.
Unstable conditions created by excessive
capacitance in loudspeaker cables.
Remedy
Reduce volume slightly or use higher efficiency
loudspeakers.
Add subwoofer loudspeaker system to relieve load
on main system.
Check loudspeaker cable and associated
connections.
Consult dealer or JRDG.
Reconfigure Amplifier to proper AC mains voltage
operation. Consult dealer or JRDG.
Consult dealer or JRDG.
Reorient or increase distance between source
component and Amplifier.
Break ground loop by lifting (electrically
disconnecting) ground connection from AC mains
power cord. (For safety purposes, chassis ground
is still maintained through input interconnect
shield when Amplifier INPUTS are connected.)
Use balanced input system configuration (if
applicable).
Insert compensation network on Amplifier
PARALLEL OUTPUTS connector(s) (available from
JRDG).