Yamaha T3n, T4n, T5n Controls and Functions, ■Front Panel, 9Air intakes, 2TEMP indicator, 5CLIP indicator, 7MUTE indicator, 4REMOTE indicator, 6SIGNAL indicator

Controls and Functions

■Front Panel

4 3

1POWER switch and indicator

Press to toggle the power on or off. The POWER indicator lights up green when the power is ON.

If the ampliﬁer is connected to an amp control unit such as the ACU16-C and the ampliﬁer has been commanded to enter STANDBY mode, this indicator will light orange.

2TEMP indicatorLights up red if the heat sink temperature exceeds 85°C (185°F).3PROTECTION indicator

When the protection system is active, the indicator lights in red. No sound will be output from the speakers, since the speakers are automatically disconnected from the ampli- ﬁer’s outputs.

The protection system actives in the following situations:•When the ampliﬁer is turned on

The protection system actives for approximately 10 seconds when the ampliﬁer is turned on. After 10 sec- onds, the protection system deactivates automatically and the ampliﬁer is ready for normal operation.

•If the ampliﬁer overheats

The protection system activates if the heat sink tem- perature exceeds 85°C (185°F). The ampliﬁer is muted if the heat sink temperature exceeds 90°C (194 °F). The ampliﬁer operates normally after the ampli- ﬁer cools down.

4REMOTE indicator

This indicator will light green if the ampliﬁer is being controlled by an amp control unit such as ACU16-C.

5CLIP indicator

Lights up red when the output signal distortion on the corre- sponding channel rises above 1% — indicating that “clip- ping” has occurred because the signal level is too high.

6SIGNAL indicator

Lights up green when the corresponding channel’s output level exceeds 1 Vrms (equivalent to 0.2 W into an 8 ohms load, 0.4 W into a 4 ohms load or 0.8 W into a 2 ohms load).

6 5 6

T5n

7 8

7MUTE indicator

This indicator will light red if the ampliﬁer is muted by an amp control unit such as the ACU16-C. This indicator will also light red while the PROTECTION indicator is ON.

8Volume control knobs

Each control knob adjusts the volume of the corresponding channel, in 31 steps from -∞dB to 0 dB.

Note: Screw holes for security cover

These four screw holes are for attaching a security cover to protect the volume setting. Since a security cover and screws are not included in the ampli- ﬁer, please prepare a security cover the same size as indicated below and four M3 screws.

30 mm

108 mm

9Air intakes

The ampliﬁer uses forced-air cooling. The variable speed cooling fan draws air in from the front and exhausts it through the rear. The cooling fan speed varies depending on the heat sink temperature: It operates at low speed when it is below 40 °C (104 °F), increases in speed according to increases in temperature, and operates at high speed when temperature exceeds 60 °C (140 °F). Please be sure that you do not block the air intakes or exhaust vents. Also, clean the ﬁlter elements regularly. If the air intakes are clogged with dust or debris, the ampliﬁer will overheat, which may result in the ampliﬁer shutting down.

Front	Rear
Air	Air
intake	exhaust

0Screw holes for handles

These four screw holes are for the included handles. Fix the handles to the ampliﬁer, using the included ﬂat-head screws.

6 T5n/T4n/T3n Owner’s Manual