Jeff Rowland Design Group 112 Manuel D’Utilisation

Basic Troubleshooting

summary of fault conditions and their causes and remedies are listed below.

The Model 112 Stereo Power Amplifier can produce high power levels that, without well-designed protection circuitry, could damage

loudspeakers. Therefore, most fault conditions will result in the Model 10 reverting into Standby Mode.

Condition:

Cause:

Remedy:

Front panel POWER INDICATOR LED does not

illuminate after pressing POWER/STANDBY BUTTON,

amplifier does not operate normally:

Incorrect power connections, incorrect speaker

connections, or circuit breaker must be reset.

Reset circuit breaker, review Installation and Rear

Panel Connections section of Owner’s Manual.

Abnormal Operation of the Model 112 internal

circuitry.

Contact your dealer immediately.

FRONT PANEL STANDBY/POWER button reverts to

Standby Mode during listening but can be returned

to normal operation:

Excessive sub-sonic or DC signals produced by

source components.

Repair or replace source component. Identify and

correct abnormal conditions such as low frequency

rumble and/or acoustic feedback caused by

phono playback (if applicable).

Severe clipping of amplifier circuitry.

Reduce volume slightly or use higher efficiency

loudspeakers.

AC MAINS CIRCUIT BREAKER switches OFF or will not

remain ON:

AC mains voltage too high for amplifier.

Consult your dealer immediately to have the

amplifier reconfigured for the proper AC mains

voltage.

Abnormal operation of amplifier internal circuitry.

Contact your dealer immediately.

50/60 Hz buzz noise in loudspeakers:

Ground loop condition created between

components in system.

Use balanced system configuration if possible.

Inspect interconnect cables for poor connection or

termination.