Rotel Comprehensive Guide for RB 976 Six Channel Power Amplifier

If you are using terminal lugs, connect them to the wires. If you are attaching bare wires directly to the binding posts, separate the wire conductors and strip back the insulation from the end of each conductor. Be careful not to cut into the wire strands. Un- screw (turn counterclockwise) the binding post hexagonal thumb- screws. Place the connector lug or wire around the binding post shaft. Turn the hexagonal thumbscrews clockwise to clamp the connector lug or wire firmly in place.

Note: Be sure there are no loose wire strands that could touch adjacent wires or connectors.

Troubleshooting

Most difficulties in audio systems are the result of incorrect con- nections, or improper control settings. If you encounter problems, isolate the area of the difficulty, check the control settings, deter- mine the cause of the fault and make the necessary changes. If you are unable to get sound from the RB-976, refer to the sugges- tions for the following conditions:

Bridged Mono Operation

[See Figure 3 for bridged operation connection illustration.]

The channel pairs of the RB-976 can be “bridged”. In this configu- ration the single channel produces a massive 150 watts! This fea- ture allows you to increase the overall power output of your system by bridging the channel pairs of the RB-976 and adding a second RB-976 that also has bridged channel pairs. Or one of the RB-976 channel pairs may be bridged to drive a monophonic sub- woofer. Note however that when one of the RB-976 channel pairs is bridged the speaker connected to it must have an impedance of 8 ohms or more.

Note: Turn off all the system components before you change any signal connections or the setting of the Input Selector Switches.

To bridge one of the RB-976 channel pairs move the Input Selector Switch for that channel to the “Bridged” position.

Front Panel Power Indicator Is Not Lit

No main power to the RB-976. Check the front panel power switch. Make sure that it is set to the on position. Check AC power connections at the amplifier and the AC outlet.

Fuse Replacement

If everything checks out correctly and you still cannot get the am- plifier to turn on, the internal power fuse may have blown. If you believe this has happened, contact your authorized Rotel dealer to get the fuse replaced.

No Sound

If the amp is getting AC power, but is producing no sound, check the Channel and Bridged Mono indicator lights on the front panel. Then check all input and output connections to be sure they are correct. Finally check the connections to, and the control settings of, the associated components.