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LOCATION

The P7000 uses forced-air fan cooling to remove the heat produced in normal operation. Although this makes
the amplifier less sensitive to ventilation than if it were passively cooled, fresh air flow at the mounting location
must still be considered. The fan pulls in fresh air through the side vents and the heated air is forced out through
the front panel. Another consideration when choosing the location for a fan cooled amplifier is its proximity
to the listening position. In some situations the sound of the fan operation can be distracting.

The power transformer can generate a substantial magnetic field, so caution should be exercised in the
placement of low level components such as a tape deck, mixer or mic preamp to avoid inducing noise in the
low level circuitry. Allow several inches of clearance when mounting these components.

AC LINE

The P7000 operates from a 120 volt, 60Hz AC power line. Connection is made by 14 gauge, IEC Type 320,
grounded line cord. For safety considerations only a properly grounded (earthed) receptacle should be used.
If a grounded circuit is not available do not break off the ground pin; use the proper adapter plug for a two wire
receptacle. The power line fuse is mounted on the rear panel of the amplifier. If this fuse blows replace it only
with the same type and rating fuse. The correct replacement fuse value is printed on the rear of the amplifier
and in the parts list.

INPUT

The input jacks used on the P7000 are dual function connectors which accept 1/4" (Tip Ring Sleeve) phone and
XLR plugs. The amplifier will operate with either a balanced or unbalanced signal source. The connector pin-
out is printed on the rear panel of the amplifier.

Balanced Input: 1/4" Tip Ring Sleeve

The 1/4" balanced input jack is connected according to conventional usage with the Tip high (+), Ring
return (–) and the Sleeve ground shield.

Balanced Input: XLR

The XLR balanced input jack is connected according to the IEC and AES Standard, with pin 2 high (+),
pin 3 return (–) and pin 1 ground shield. When preparing to use the amplifier, check the output
configuration of the source unit to maintain the proper signal polarity.

Unbalanced Input

Many popular mixers use unbalanced RCA phono or 1/4" phone jacks for the monitor outputs and can
be used with the P7000 for short cable runs. The specifications for the mixer should give the maximum
cable length it is capable of driving. The return (–) terminal must be grounded when using the amplifier
with the input unbalanced to prevent unstable operation.

Unbalanced Source with Balanced Input

Some systems will have a noticeable amount of residual ground noise when run with unbalanced signal
lines. Better noise rejection can be achieved in these systems by using shielded, twisted pair (balanced)
cable from the unbalanced source. At the source end of the cable, connect an RCA or 1/4" phone plug
with the return (–) wire and shield connected to the ground terminal of the plug. Wire the plug at the
amplifier end of the cable the same as for the regular balanced input connection described above.

– 2 –

Содержание Trans Nova P7000

Страница 1: ... PROFESSIONAL POWER AMPLIFIER P7000 Installation Operation PROFESSIONAL POWER AMPL nova trans DESIGNED AND ASSEMBLED IN THE U SA ...

Страница 2: ...connected equip ment Furthermore extensioncordsorpowerstripsmustprovide the same three wire grounded connection It is important that the blades of the equipment s plug be able to fully insert into the matingreceptacle Neverremovetheroundgroundingpinonthe plug in an attempt to mate to a two wire ungrounded receptacle use a grounding adaptor with the grounding tab or wire suitably connected to earth...

Страница 3: ...4Ω Gain 15dB min 30 max CMRR 75dB at 1kHz Damping Factor 600 to 1kHz 200 to 10kHz 25 to 100kHz Power Consumption 275 VA quiescent 1440 VA with both channels driven at 350 watts at 8Ω 1800 VA maximum Controls Switches Front Panel Power switch Normal Bridged mode switch level controls Rear Panel Chassis Float ground switch Stereo Bi amp selector switch Crossover Variable high pass low pass and bandp...

Страница 4: ...ch 4 Level Controls 4 XCard Crossovers 4 Ground Switch 5 Short Circuit Protection 5 LED Indicators 5 Warm Up 5 Cleaning and Maintenance 5 TECHNICAL REFERENCE Field Service Considerations 6 Theory and Operation of trans nova 6 PC Board Layout 7 Schematic Diagram 8 Parts List 10 P7000 Functional Block Diagram 12 Circuit Operation 13 Amplifier Module Replacement 16 Building Custom XCards 17 Resistor ...

Страница 5: ...r to drive reactive speaker loads without the performance and sound penalties imposed by elaborate Safe Operating Area protection schemes Active crossovers are incorporated at the input of the amplifier These crossovers are controlled through the use of our XCard plug in modules Each XCard can operate as a full range high pass or low pass filter with a 12dB per octave Butterworth alignment Each ch...

Страница 6: ... in the parts list INPUT The input jacks used on the P7000 are dual function connectors which accept 1 4 Tip Ring Sleeve phone and XLR plugs The amplifier will operate with either a balanced or unbalanced signal source The connector pin out is printed on the rear panel of the amplifier Balanced Input 1 4 Tip Ring Sleeve The 1 4 balanced input jack is connected according to conventional usage with ...

Страница 7: ... With the switch set for STEREO Channel 1 and Channel 2 require separate input signal source feeds When the switch is set for BI AMP the Channel 1 input feeds the signal to both amplifier channels for dual mono operation The level control and XCard for each channel are still active Bridged Mono In systems with higher power requirements the P7000 can be configured for signal channel bridged mono op...

Страница 8: ...osition the Channel 1 and inputs are connected to Channel 2 in reversed polarity which inverts the Channel 2 output Only the Channel 1 input is used and the speaker is connected to the two RED binding posts The amplifier gain is adjusted by the Channel 1 level control the Channel 2 control is not active Because of thermal considerations we do not recommend using less than a nominal eight ohm load ...

Страница 9: ... off then back on to reset the short detector LED INDICATORS Amplifier operation is monitored internally and each channel has four status LEDs These indicators can be used for system troubleshooting in case of aberrant behavior Signal Monitors the amplifier output and lights when a signal is present The SIGNAL indicator is calibrated to activate an equivalent input voltage of 30mV with the amplifi...

Страница 10: ...conventional follower connection using the same MOSFET devices This increase in efficiency allows the use of a much simpler input section than in the more common high voltage designs The number of serial stages from input to output can be reduced from five or more to only three This also allows the input section tobedesignedwiththecriteriaofhighqualityClassAlineampwiththecharacteristichighlinearit...

Страница 11: ... 7 PC BO A R D LA Y O U T ...

Страница 12: ......

Страница 13: ... CDS 104CCDB C16 0 1µF 50V CDS 104CCDB C17 0 1µF 50V CDS 104CCDB C18 0 1µF 50V CDS 104CCDB C19 0 1µF 50V CDS 104CCDB C20 0 1µF 50V CDS 104CCDB DESIGNATOR VALUE PART ALL RESISTORS IN OHMS R1 56 2k 1 4W 1 RMP 4 5622 03 R2 1k 1 4W 5 RM 4 102C R3 47k 1 4W 5 RM 4 473C R4 47k 1 4W 5 RM 4 473C R5 1k 1 4W 5 RM 4 102C R6 280 1 4W 1 RM 4 2800C R7 2 15k 1 4W 1 RM 4 2151C R8 200 Trim Pot RVH 201 R9 2 26k 1 4W...

Страница 14: ...Channel MOSFET SS 0961 069 Q33 N Channel MOSFET SS 0961 069 Q40 P Channel MOSFET SS 0962 069 Q41 P Channel MOSFET SS 0962 069 Q42 P Channel MOSFET SS 0962 069 Q43 P Channel MOSFET SS 0962 069 Q103 MMBT5088L SS 0114 Q104 MMBT5087L SS 0115 Q105 MMBT5087L SS 0115 BR1 Bridge Rectifier SSH 609 CR1 LED Red SS 741 CR2 LED Red SS 741 CR3 LED Red SS 741 CR4 LED Green SS 740 DESIGNATOR VALUE PART CR5 MMBD91...

Страница 15: ...t Integrator U2B C22 C21 R11 CMRR Adjust R8 Differential Amp Q6 Q7 Positive Input Buffer U1A XCard Crossover U7A Level Control R24 Input Buffer U2a Feedback Network Driver Cascode Q11 Q12 Output Q40 Q41 Q42 Q43 B 94V Output Local Feedback Bias Adjust R136 Driver Cascode Q9 Q10 Current Mirror Q104 Q105 DIABLO R73 CR16 Q17 Q18 Output Q30 Q31 Q32 Q33 B 94V 12 ...

Страница 16: ...rom the factory setting however if the amplifier is repaired and output devices have been changed or if the two channels of the amplifier do not run at the same temperature recalibrating the bias is necessary Disconnect the power to the amplifier before removing the cover To adjust the bias disconnect the input and speakers and remove the jumper JW7 Connect an amp meter across the exposed pins The...

Страница 17: ...s down that channel when a shorted output condition is detected Recovering from the Short protection requires turning the amplifier off to reset it The Clip Detectors U3A and U4B monitor the Drive Signal and change state when the drive signal level is sufficient to clip the output stage The output of U3A goes high when the drive signal exceeds the clip threshold and is connected to the input of U3...

Страница 18: ...LIP indicator is driven by the buffer U5C which is controlled by the comparator U5A The voltage divider R56 and R57 established the reference voltage for the clipping detector at pin 7 of U5A The reference voltage scales the output of U5A to indicate when the Drive Signal at pin 6 demands in excess of the available voltage or current of the outputstage TheoutputofU5AisstretchedbyR55andC30toprevent...

Страница 19: ...s two outside and one inside Remove the two 9 64 Allen screws on the bottom edge of the side of the amplifier Remove the Phillips screw located behind the level control which is accessible through the hole in the PC board The module can now be lifted from the chassis Prepare a new Channel 1 module for installation by setting the input mode switches to the default position according to the markings...

Страница 20: ...Butterworth aligned XCards each of which contains two resistors and two capacitors to control the crossover frequency The XCard will operate as either a high pass or low pass filter depending upon its orientation The following tools are needed to build the XCards Soldering Iron appropriate for PC board work Solder suitable for electronics Desoldering Braid Our tests have shown that for operating f...

Страница 21: ... 600Hz 12 1kΩ 12 1kΩ 700Hz 10 2kΩ 10 2kΩ 800Hz 9 9kΩ 9 9kΩ 900Hz 8 6kΩ 8 6kΩ 1kHz 7 15kΩ 7 15kΩ 1 2kHz 6 04kΩ 6 04kΩ 2 0kHz 3 57kΩ 3 57kΩ 3 0kHz 2 37kΩ 2 37kΩ 4 0kHz 1 76kΩ 1 76kΩ 5 0kHz 1 43kΩ 1 43kΩ 6 0kHz 1 21kΩ 1 21kΩ 7 0kHz 1 02kΩ 1 02kΩ 8 0kHz 909Ω 909Ω 18 Frequency R1 R2 20Hz 169kΩ 169kΩ 25Hz 133kΩ 133kΩ 30Hz 110kΩ 110kΩ 35Hz 95 3kΩ 95 3Ω 40Hz 84 5kΩ 84 5kΩ 45Hz 75kΩ 75kΩ 50Hz 68 1kΩ 68 1kΩ...

Страница 22: ...rom the date of purchase including parts labor and return shipping costs within the Continental United States Alaska and Hawaii This warranty applies only to products sold in the United States of America For warranties outside the U S A please contact your local agent It is the owner s responsibility to pay shipping preferably United Parcel Service UPS to the factory collect shipments will not be ...

Страница 23: ...9 95 HAFLER PROFESSIONAL A DIVISION OF ROCKFORD CORPORATION 546 SOUTH ROCKFORD DRIVE TEMPE ARIZONA 85281 U S A IN U S A 602 967 3565 IN CANADA 604 942 1001 IN EUROPE FAX 49 4207 801250 IN JAPAN FAX 81 559 79 01265 ...

Страница 24: ......

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