Yamaha P-4050 [11/18] Caution for speaker connection

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 kemble music u k ltd 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
• Amplifier ventilation p.4
• Always use the correct power supply p.4
• Air filter maintenance p.4
• 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
• Thermal indicator p.5
• Protection indicator p.5
• Power switch indicator p.5
• Operation p.5
• Input attenuators p.5
• Cooling fans 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
• To input terminals p.8
• Mixer or pre amp output p.8
• D c b b a b p.8
• 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
• C 0 a b p.9
• To input terminals p.9
• Mixer or pre amp output p.9
• C 0 a d p.9
• Portable rack mounting p.10
• Permanent rack mounting p.10
• Installation details p.10
• Caution for speaker connection p.11
• 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
• 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
• 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
• Unit mm inch p.16
• Dimensions p.16
• Attention p.17
• Advarsel p.17
• Achtung p.17
• Varoitus p.17
• Service p.17
• Observera p.17
• Kundendienst p.17
• Entretien p.17
• Caution p.17
• Avvertenza p.17
• Yamaha corporation p.18
• Yamaha p.18

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CAUTION FOR SPEAKER CONNECTION 1 Turn off the POWER switch Speaker output terminals 2 Remove the cover attachment screws and remove the protective cover from the speaker terminals The protective cover is equipped with British model and general model Cover attachment screws Protective cover 3 After removing approx 10 mm of covering insula tion from the ends of the speaker cables pass the bare ends of the speaker wires through the holes in the corresponding speaker terminals and tighten the terminals to securely clamp the wires At this time make sure that the bare ends of the speaker cables do not extend from the terminals in such a way that they touch the chassis or protective cover Connect the speakers used for 2 channel 3 channel or 4 channel output to the corresponding speaker termi nals Take care that the end of each speaker cable does not short with another end of the speaker cable or with the chassis or protective cover and then secure the wire in place by tightening down the terminal Also always make sure that the power is OFF before attaching or removing speaker wires If long speaker cables are required use cables with as heavy a gauge as possible to protect against degrada tion caused by the damping factor and to prevent power loss inside the speaker cables When operating the P4050 in 2 channel output mode it delivers a hefty MOW MOW 8 ohms Be sure to use speaker systems of sufficient input capacity If the allowable input power of the speaker system is lower than the rated output power of the amplifier you can protect the speakers by connecting an in line fuse between each speaker and the amplifier You can use the following formula to determine the size of fuse needed for your system Po PR l Po Continuous allowable input power of speaker noise or RMS R Nominal impeadance of speaker I Necessary fuse capacity A Wire should not touch the chassis or protective cover 4 Reattach the protective cover over the speaker ter minals Example Speaker continuous allowable input power 100 W Speaker impedance 8 ohm Using these values Necessary fuse capacity A 3 5 9