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WARNING: THIS APPARATUS MUST BE EARTHED

IMPORTANT

THE WIRES IN THIS MAINS LEAD ARE COLOURED IN 
ACCORDANCE WITH THE FOLLOWING CODE:

          GREEN-AND-YELLOW :      EARTH

          BLUE :                                     NEUTRAL

          BROWN :                                LIVE

As the colours of the wires in the mains lead of this apparatus may 
not correspond with the coloured markings identifying the terminals in 
your plug, proceed as follows:

The wire which is coloured GREEN and YELLOW must be 
connected to the terminal in the plug which is marked by the letter E 
or by the safety earth symbol        or coloured GREEN and YELLOW.

The wire which is coloured BLUE must be connected to the terminal 
which is marked with the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the 
terminal which is marked with the letter L or coloured RED.

*  This applies only to products distributed by YAMAHA KEMBLE 

MUSIC (U.K.) LTD.

FCC INFORMATION (U.S.A.)

1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT! This product, when installed as indicated in the instructions contained in this manual, meets FCC 

requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product.

2. IMPORTANT: When connecting this product to accessories and/or another product use only high quality shielded cables. Cable/s supplied with this product MUST 

be used. Follow all installation instructions. Failure to follow instructions could void your FCC authorization to use this product in the USA.

3. NOTE: This product has been tested and found to comply with the requirements listed in FCC Regulations, Part 15 for Class “B” digital devices. Compliance with 

these requirements provides a reasonable level of assurance that your use of this product in a residential environment will not  result in harmful interference with 
other electronic devices. This equipment generates/uses radio frequencies and, if not installed and used according to the instructions found in the users manual, may 
cause interference harmful to the operation of other electronic devices. Compliance with FCC regulations does not guarantee that interference will not occur in all 
installations. If this product is found to be the source of interference, which can be determined by turning the unit “OFF” and  “ON”, please try to eliminate the 
problem by using one of the following measures: Relocate either this product or the device that is being affected by the interference. Utilize power outlets that are on 
different branch (circuit breaker or fuse) circuits or install AC line filter/s. In the case of radio or TV interference, relocate/reorient the antenna. If the antenna lead-in 
is 300 ohm ribbon lead, change the lead-in to coaxial type cable. If these corrective measures do not produce satisfactory results, please contact the local retailer 
authorized to distribute this type of product. If you can not locate the appropriate retailer, please contact Yamaha Corporation of America, Electronic Service 
Division, 6600 Orangethorpe Ave, Buena Park, CA 90620

The above statements apply ONLY to those products distributed by Yamaha Corporation of America or its subsidiaries.

European Specifications Only

This     mark indicates a dangerous electrically live terminal. 
When connecting an external wire to this terminal, it is 
necessary either to have “a person who have received 
appropriate guidance on handling” make the connection or to 
use leads or a cord that have been manufactured in such a way 
that the connection can be made

 

simply and without problem.

•  Explanation of Graphical Symbols

The lightning flash with arrowhead symbol
within an equilateral triangle is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient magni-
tude to constitute a risk of electric shock to
persons.

The exclamation point within an equilat-
eral triangle is intended to alert the user to
the presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the product.

CAUTION: TO REDUCE THE RISK OF 

ELECTRIC SHOCK, DO NOT REMOVE 

COVER (OR BACK). NO USER-SERVICEABLE 

PARTS INSIDE. REFER SERVICING TO 

QUALIFIED SERVICE PERSONNEL.

C A U T I O N

RISK OF ELECTRIC SHOCK

DO NOT OPEN

The above warning is located on the
top of the unit.

Summary of Contents for PC4800N

Page 1: ...POWER AMPLIFIER Owner s Manual E ...

Page 2: ...h FCC regulations does not guarantee that interference will not occur in all installations If this product is found to be the source of interference which can be determined by turning the unit OFF and ON please try to eliminate the problem by using one of the following measures Relocate either this product or the device that is being affected by the interference Utilize power outlets that are on d...

Page 3: ...k If you think internal inspection maintenance or repair is necessary contact your dealer Do not modify the unit Doing so is a fire and electrical shock hazard If lightning begins to occur turn off the power switch of the unit as soon as possible and unplug the power cable plug from the electrical outlet If there is a possibility of lightning do not touch the power cable plug if it is still connec...

Page 4: ...tch off remove the power plug from the AC outlet and remove all connecting cables Damaged cables may cause fire or electrical shock Allow enough free space around the unit for normal ventila tion This should be 5 cm at the sides 10 cm behind and 10 cm above For normal ventilation during use remove the rear of the rack or open a ventilation hole If the airflow is not adequate the unit will heat up ...

Page 5: ...below 40 Hz and detented attenuators and level meters for channels A and B are provided Metering and indicators include easily visible two channel level meters a PROTECTION indicator that shows the state of various protection systems power on off detection output protection DC detection a TEMP indicator that indicates heat sink overheating and a REMOTE indicator that indicates the external remote ...

Page 6: ...rmal operation If a DC voltage is detected at the amplifier s outputs Turn off the power and then turn the power back on again If the amplifier overheats When this occurs the TEMP indicator will be lit You should turn off the amplifier and allow it time to cool down See the Precautions section of this Owner s Manual for ways to prevent the amplifier overheating 4 TEMP indicator This indicator will...

Page 7: ...ng a 12 dB octave high pass filter 4 SPEAKERS jacks These are Speakon type output jacks Speakon type cable plugs can be connected here These are five way binding post output jacks 5 6 8 9 4 1 7 2 3 5 DATA ports An external control unit or interface box can be connected here to monitor or control the amplifier from the external device 6 AMP ID switch When an external control unit is connected to th...

Page 8: ...er of speakers that are connected Refer to the following diagrams and make sure that the speaker impedance is not less than the value prescribed for each type of connection Connections in BRIDGE mode Speaker min 8Ω When using the Speakon connector Speaker min 8Ω Use the 1 and 2 pins of the 2 jack Connections in STEREO PARALLEL modes Speaker min 4Ω Speaker min 4Ω or ...

Page 9: ...peaker terminals Screw 3 After removing approx 15 mm of insulation 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 Refer to page 8 for speaker polarity 15mm Shown actual size At this time make sure that the bare ends of the speaker cables do not extend from the...

Page 10: ...e rear panel of the rack and the rear panel of the amplifier Fan Use a fan with 1 5 m3 min or more maximum wind and 5 mmH2 O or more maximum static pressure Mounting Install the fan kit on the top slot or the top panel of the rack and install a blanking panel between two amps If the unit is rack mounted and transported frequently we recommend that the rear of the unit be supported by fitting a pai...

Page 11: ...Power into 8Ω 9 dB 6 dB Voltage Gain Vol max 32 dB Input Impedance 30 kΩ Balanced 15 kΩ Unbalanced Controls Front Panel POWER switch ON OFF Volume 31 position ch Rear Panel MODE switch STEREO BRIDGE PARALLEL HPFswitch ON OFF fc 40 Hz 12dB octave DIP switch 6P Connectors Input XLR 3 31 type ch Euroblock connector ch Output SPEAKON ch 5 way binding posts NETWORK RJ45 x 2 POWER AC INLET Indicators PO...

Page 12: ...12 Block Diagram ...

Page 13: ...13 Dimensions Unit mm 480 88 456 46 4 380 26 25 30 370 30 25 ...

Page 14: ...ted in the amplifier s output circuit Locate and remove the short Check the ventilation around the amplifier and improve the airflow if necessary Consult your dealer or a Yamaha service center The PC limiter circuit activates to protect the power transistors The thermal protection circuit activates to protect the power transistors The output relay activates to protect the speaker system Use a spea...

Page 15: ......

Page 16: ...YAMAHA CORPORATION V853450 R11 AP 16 Pro Audio Digital Musical Instrument Division P O Box 3 Hamamatsu 430 8651 Japan NP Printed in Taiwan ...

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