Yamaha P-4050 [12/18] 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

Содержание

• Yamaha p.1
• Power amplifier amplificateur de puissance p.1
• Connecting the plug and cord warning this apparatus must be earthed p.2
• This applies only to products distributed by yamaha canada music ltd p.2
• Important notice for the united kingdom p.2
• Fcc information u s a p.2
• Canada p.2
• Applies only to products distributed by yamaha corporation of america p.2
• This applies only to products distributed by yamaha kemble music u k ltd p.2
• Vibration p.4
• Removing connections p.4
• Precautions p.4
• Or modifications yourself p.4
• Make sure power is off before making or p.4
• Handle cables carefully p.4
• Do not open the case or attempt repairs p.4
• Clean with a soft dry cloth p.4
• Avoid physical shocks p.4
• Avoid excessive heat humidity dust and p.4
• Amplifier ventilation p.4
• Always use the correct power supply p.4
• Air filter maintenance p.4
• Thermal indicator p.5
• Input attenuators p.5
• Cooling fans p.5
• Protection indicator p.5
• Power switch indicator p.5
• Operation p.5
• Rear panel p.6
• Speaker terminals p.7
• Output mode switch p.7
• O input terminals screw type p.7
• Input mode switch p.7
• Input connectors trs phone type p.7
• Gnd terminal p.7
• 2сн e e p.7
• Connections p.8
• Combining the input mode and output mode switch settings the amplifier offers the following six application setups p.8
• Amplifier with 4 inputs and 4 outputs amplifier with 1 input and 4 outputs p.8
• 4 inputs 4 outputs 1 input 4 outputs 3 inputs 3 outputs 1 input 3 outputs 2 inputs 2 outputs 1 input 2 outputs p.8
• To input terminals p.8
• Mixer or pre amp output p.8
• D c b b a b p.8
• To input terminals p.9
• Mixer or pre amp output p.9
• C 0 a d p.9
• C 0 a b p.9
• Portable rack mounting p.10
• Permanent rack mounting p.10
• Installation details p.10
• Caution for speaker connection p.11
• Make sure the power to the amplifier is off p.12
• Indicator display probable cause remedy protective circuit operation p.12
• If the filter elements are exceptionally dirty deter gent washing up liquid may be used p.12
• Dry the filter elements thoroughly p.12
• Cleaning the filter elements p.12
• Troubleshooting p.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 p.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 p.12
• Remove the power plug from the ac mains socket p.12
• Remove the filter elements and wash in plain water p.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 p.12
• Specifications p.13
• Purchaser user information specified in en55103 1 and en55103 2 inrush current 16a conformed environment el e2 e3 and e4 p.13
• For european model p.13
• Thd vs output power p.14
• Performance graphs p.14
• Output power vs power consumption p.14
• Frequency response p.14
• Channel separation p.14
• Block diagram p.15
• Dimensions p.16
• Unit mm inch p.16
• Varoitus p.17
• Service p.17
• Observera p.17
• Kundendienst p.17
• Entretien p.17
• Caution p.17
• Avvertenza p.17
• Attention p.17
• Advarsel p.17
• Achtung p.17
• Yamaha corporation p.18
• Yamaha p.18

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CLEANING THE FILTER ELEMENTS To ensure adequate cooling air intake the filter element must be cleaned when it has become clogged The following points describe the cleaning procedure 1 Make sure the power to the amplifier is OFF 2 Remove the power plug from the AC mains socket 3 Remove the filter elements and wash in plain water If the filter elements are exceptionally dirty deter gent washing up liquid may be used 4 Dry the filter elements thoroughly 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 TROUBLESHOOTING 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 Indicator display CLIP indicator lights Probable cause Remedy Protective circuit operation There is a short at a speaker terminal amplifier terminal or wire Locate and correct the cause of the short The PC limiter circuit operates to protect the power transistors The amplifier load is excessive When speakers are connected to the A B C and D speaker terminals make sure that their impedance is 4 ohms or more In case of connection to the L and R terminals the speaker imped ance should be 8 ohms or less Same as above The heat sink temperature has exceeded 100 C Check the amplifier ventilation conditions and take appropriate measures to improve airflow around the amplifier The thermal protection circuit operates to protect the power transistors A DC voltage of 2V or greater was generated in the power amplifier s output circuit Consult your dealer or nearest Yamaha service center The relay operates to protect the speaker system PROTECTION indicator lights 10