Jeff Rowland Design Group Model 2 - Manual (Page 16)

Condition
FRONT PANEL STANDBY/POWER button
illuminates normally but RIGHT, LEFT or both
Amplifier CHANNELS do no operate or warm up
to normal operating temperature.
AC MAINS CIRCUIT BREAKER (rear panel)
switches off or will not remain on.
50/60 Hz hum noise in loudspeakers.
High frequency, random or scratching noise in
loudspeakers.
Cause
Internal DC fuses defective.
AC mains service voltage too high for Amplifier.
Sensitive source component(s) located too close to
Amplifier.
Unstable conditions created by excessive
capacitance in loudspeaker cables.
Remedy
Consult dealer or JRDG.
Reconfigure Amplifier to proper AC mains voltage
operation. Consult dealer or JRDG.
Reorient or increase distance between source
component and Amplifier.
Insert compensation network on Amplifier
OUTPUT connector(s) (available from JRDG).
Basic Troubleshooting