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Yamaha P-4050 [5/18] Thermal indicator
![Yamaha P-4050 [5/18] Thermal indicator](/views2/1013971/page5/bg5.png)
Содержание
- Power amplifier amplificateur de puissance 1
- Yamaha 1
- Applies only to products distributed by yamaha corporation of america 2
- Canada 2
- Connecting the plug and cord warning this apparatus must be earthed 2
- Fcc information u s a 2
- Important notice for the united kingdom 2
- This applies only to products distributed by yamaha canada music ltd 2
- This applies only to products distributed by yamaha kemble music u k ltd 2
- Air filter maintenance 4
- Always use the correct power supply 4
- Amplifier ventilation 4
- Avoid excessive heat humidity dust and 4
- Avoid physical shocks 4
- Clean with a soft dry cloth 4
- Do not open the case or attempt repairs 4
- Handle cables carefully 4
- Make sure power is off before making or 4
- Or modifications yourself 4
- Precautions 4
- Removing connections 4
- Vibration 4
- Cooling fans 5
- Input attenuators 5
- Operation 5
- Power switch indicator 5
- Protection indicator 5
- Thermal indicator 5
- Rear panel 6
- 2сн e e 7
- Gnd terminal 7
- Input connectors trs phone type 7
- Input mode switch 7
- O input terminals screw type 7
- Output mode switch 7
- Speaker terminals 7
- 4 inputs 4 outputs 1 input 4 outputs 3 inputs 3 outputs 1 input 3 outputs 2 inputs 2 outputs 1 input 2 outputs 8
- Amplifier with 4 inputs and 4 outputs amplifier with 1 input and 4 outputs 8
- Combining the input mode and output mode switch settings the amplifier offers the following six application setups 8
- Connections 8
- D c b b a b 8
- Mixer or pre amp output 8
- To input terminals 8
- C 0 a b 9
- C 0 a d 9
- Mixer or pre amp output 9
- To input terminals 9
- Installation details 10
- Permanent rack mounting 10
- Portable rack mounting 10
- Caution for speaker connection 11
- Cleaning the filter elements 12
- Dry the filter elements thoroughly 12
- If the filter elements are exceptionally dirty deter gent washing up liquid may be used 12
- Indicator display probable cause remedy protective circuit operation 12
- Make sure the power to the amplifier is off 12
- Never replace the filter elements while they are still wet replace the elements and front filter grilles the replacement part number of the filter element is vm57950 12
- Remove the filter elements and wash in plain water 12
- Remove the power plug from the ac mains socket 12
- The following table lists the main causes of abnormal operation and the corrective measures required as well as the protective circuit operation in each case 12
- To ensure adequate cooling air intake the filter element must be cleaned when it has become clogged the following points describe the cleaning procedure 12
- Troubleshooting 12
- For european model 13
- Purchaser user information specified in en55103 1 and en55103 2 inrush current 16a conformed environment el e2 e3 and e4 13
- Specifications 13
- Channel separation 14
- Frequency response 14
- Output power vs power consumption 14
- Performance graphs 14
- Thd vs output power 14
- Block diagram 15
- Dimensions 16
- Unit mm inch 16
- Achtung 17
- Advarsel 17
- Attention 17
- Avvertenza 17
- Caution 17
- Entretien 17
- Kundendienst 17
- Observera 17
- Service 17
- Varoitus 17
- Yamaha 18
- Yamaha corporation 18
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OPERATION FRONT PANEL O POWER Switch Indicator Pressing this switch turns the power ON and press ing again turns the power OFF The indicator lights when the power is ON THERMAL Indicator When the heat sink temperature exceeds 80 degC the cooling fan will operate at high speed and the thermal indicator will light If the indicator remains lit for a long time check for cooling problems such as blocked air vents For proper ventilation details refer to the Installation Details on page 8 Cooling Fans The amplifier is cooled with a variable rate cooling fans When there is ncr output signal or when the heat sink temperature is low the fan is stopped When the heat sink temperature exceeds 60 degC the fan will begin to rotate The fan speed will increase as the heat sink temperature increases PROTECTION Indicator The PROTECTION indicator lights for approximately 7 seconds after the POWER switch is pressed to indicate that the protection circuitry is operating No sound is output from the speakers while this indicator is lit This indicator will also light and sound will be cut off to the speakers if the protection circuitry is activated at any other time during ampli fier operation due to factors such as overheating or the detection of excessive DC voltage at the outputs When the problem is corrected the protection cir cuitry is automatically deactivated the indicator goes out and the amplifier resumes normal operation 0 Input Attenuators The input attenuators are 31 position click stop controls used for adjusting input sensitivity Rotating fully in the clockwise direction sets the attenuator at 0 dB while rotating fully in the counterclockwise di rection provides infinite attenuation 3