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The transistor Q1 is configured to operate as a switch which controls the current source, Q103, of the input differential
amp, Q6 and Q7. When Q1 is off, the emitter voltage is low turning off Q103. Timing of the Soft Start function is
controlled by the charging time of C29. Operation of Q1 is controlled by the THERMAL and SHORT protection circuits.
U1A and U1B are buffer amps configured as unity gain followers which feed the resistive network comprised of R24A,
R24B and R6 which attenuates the differential input at U2A and U2B. The output of U2A and U2B is taken to the inputs
of the differential amp Q6 and Q7, U2A is also configured as a DC servo integrator to null the input offset currents.
Transistor Q6 is the non-inverting input of the differential amp, taking the signal from U2A, the output is taken through
the current mirror, Q105 and Q104 where the signal is inverted, then feeds the negative driver Q11 and Q12. Transistor
Q7 is the inverting input of the differential amp, taking the signal from U2B. This output feeds the positive driver Q9
and Q10. The positive drivers Q9 and Q10, and the negative drivers Q11 and Q12 are cascoded stages which supply
drive current and voltage to the output devices. Class AB bias current is controlled by R136. The network R1 and C1
form the short loop feedback for the output stage. Global feedback is supplied by the network R10 and C8.

+18V

Positive Input

Buffer

U1A

Balanced Signal

Negative Input

Buffer

U1B

Level

Adjust

R24 A, B

Positive Buffer, DC

Offset Integrator

U2A, R11, C21,

C22

Negative Buffer

U2B

CMRR
Adjust

R8

Differential Amp

Q6, Q7

Current Mirror

Q104, Q105

Positive Driver

Cascode

Q9, Q10

+

 

Feedback

Network

Drive

Signal

Local

Feedback

Bias

Adjust

R136

Positive Output

Q4, Q115

B+

Output

B–

Negative Output

Q5, Q116

Negative Driver

Cascode

Q11, Q12

Current Source

Q103

Protection Switch,

Soft Start Delay

Q1, C29

–18V

CIRCUIT OPERATION

   trans•

nova Implementation:

– 13 –

Содержание TransNova P3000

Страница 1: ...MADE USA IN THE PROFESSIONAL POWER AMPLIFIER P1500 P3000 Installation Operation PROFESSIONAL POWER AMPL nova trans...

Страница 2: ...ockford Drive Tempe Arizona 85281 Importer s Name Importer s Address Type of Equipment 2 channel Audio Power Amplifier Speaker Model No P1000CE P1500CE P3000CE P4000CE 9505CE TRM6CE TRM8CE TRM10sCE TR...

Страница 3: ...spaces 48 26cm x 21 59cm x 8 89cm Net Weight 22 lbs 9 98kg P3000 Power Rating 150 wpc 8 200 wpc 4 400 Watts mono 8 Damping Factor 400 to 1kHz 200 to 10kHz 18 to 100kHz Input Sensitivity Range 1 2V 6...

Страница 4: ...e required total current for safe operation of all connected equip ment Furthermore extensioncordsorpowerstripsmustprovide the same three wire grounded connection It is important that the bladesofthee...

Страница 5: ...s las extensiones deben proveer de la misma conecci n aterrada de tres hiles Es importante queelenchufesepuedaintroducircompletamenteenelrecept culo Nunca remeva el pin de aterramiento en un intento...

Страница 6: ...ll e moins d tre en mesure de fournir la charge lectrique requise un fonctionement sans risque de tout mat riel reli 11 P RIODES DE NON UTILISATON Durant les p riodes de non utilisation la prise de co...

Страница 7: ...ie erforderlichen Str me bertragen k nnen Benutzen Sie immer dreiadrige Verl ngerungskable 11 ZEITR UME IN DENE DAS GER T NICHT GENUTZT WIRD Wird das Ger t ber einen l ngeren Zeitraum nicht genutzt z...

Страница 8: ...ntiscono la potenza sufficiente per i corretto fuinzionamento degli apparati connessi E alters importante che vengano sempre impiegate prolunghe con la configurazaione a tre fili con terra 11 PERIODI...

Страница 9: ...tch 7 Level Controls 7 Mono Switch 7 Short Circuit Protection 8 LED Indicators 8 Warm Up 8 Cleaning and Maintenance 8 PC BOARD LAYOUT 9 PARTS LIST 10 TECHNICAL REFERENCE Field Service Considerations 1...

Страница 10: ...ve proven extremely fault tolerant even in abusive situations This sturdiness enables the amplifier to drive reactive speaker loads without the performance and sound penalties imposed by elaborate pro...

Страница 11: ...ivision of Rockford Corp Tempe AZ 85281 U S A Made in the U S A XLR Connections 3 2 1 Phone Connections 115V 60Hz CH 1 Mono C H 1 4 8 C H 2 Mono P3000 250 V T4A CAUTION For continued protection from r...

Страница 12: ...sidered in tight quarters I N S T A L L A T I O N 3 Fan center approximately in line with edge of unit and starting of heat sink fins Fans placed 4 to 5 from front of unit Fans placed under the unit p...

Страница 13: ...able or short cable lengths in this type of configuration XLR Unbalanced Input Connect and GND shield terminals at both ends of cable to prevent unstable amplifier operation 1 4 TRS Unbalanced Input P...

Страница 14: ...Removable Center Spread SC H E M A T I C DI A G R A M P3000 shown Ground switch in Chassis position Mono switch in 2 Channel position P1500 differences shown on parts list...

Страница 15: ...Removable Center Spread...

Страница 16: ...off first when switching components to prevent sending damaging transients to the speakers It is possible to leave the power switch in the on position and switch the amplifier remotely through a powe...

Страница 17: ...lights when the drive signal voltage exceeds the maximum for linear operation of the output MOSFETs Thermal Indicates when the thermal protection has shut down the amplifier This occurs when the heat...

Страница 18: ...R44 R43 C25 C9 U5 R41 R40 R38 R15 C23 R39 C24 R37 R36 R35 R34 R33 R14 C20 C19 C18 R132 U4 C17 AC3 R32 R31 CT2 AC4 C13 C14 R30 R28 R29 R27 Q3 Q2 C16 CR9 R26 R25 R23 R22 R21 R20 R19 R18 R16 C15 R42 R12...

Страница 19: ...M 4 153C R49 10k RM 4 103C R50 4 7k RM 4 472C R51 4 7k RM 4 472C R52 15k RM 4 153C DESIGNATOR VALUE PART R53 2 2M RM 4 225C R54 10k RM 4 103C R55 100k RM 4 104C R56 15k RM 4 153C R57 10k RM 4 103C R58...

Страница 20: ...CR3 Red LED SS 741 CR4 Green LED SS 740 CR5 MMBD914L Diode SS 803SM CR6 MMBD914L Diode SS 803SM CR7 MMBD914L Diode SS 803SM CR8 MMBD914L Diode SS 803SM CR9 Bridge Rectifier 15A SS 0801 CR10 Bridge Re...

Страница 21: ...ead of the usual 1dB loss of voltage follower designs It is an inevitable result of electrical physics that this output with gain inherently increases the power gain for the same bandwidth of the outp...

Страница 22: ...the signal is inverted then feeds the negative driver Q11 and Q12 Transistor Q7 is the inverting input of the differential amp taking the signal from U2B This output feeds the positive driver Q9 and Q...

Страница 23: ...ting the protection switch Q1 and lighting the indicator CR1 The output of U4C is held low by CR14 and will reset only after the power is turned off Shut Down Switch Q5 Q4 Comparator U4A Short Indicat...

Страница 24: ...e Bias The bias control establishes the quiescent Class AB output current of the amplifier The bias should not need readjustment from the factory setting however if the amplifier is repaired and outpu...

Страница 25: ...ed on the rear panel which secure the input jacks Remove the two 9 64 Allen screws located between the heatsink fins along the top edge on each side which fasten the cover Three more screws hold the h...

Страница 26: ...rvice performed by anyone other than Hafler or an Authorized Hafler service center 3 Any product purchased outside the United States please contact your local dealer 4 Shipping charges to get the unit...

Страница 27: ...NOTES...

Страница 28: ...MAN 1461 C 4 99 E W R HAFLER A DIVISION OF ROCKFORD CORPROATION 546 SOUTH ROCKFORD DRIVE TEMPE ARIZONA 85281 U S A 480 967 3565 1 888 HAFLER1 WWW HAFLER COM...

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