Bogen-BPA125-pwr-sch维修电路原理图.pdf

RadioFans.CN 收音机爱 好者资料库 TECHNICAL SPECIFICATIONS Rated Output Power: Model BPA-60 60 watts (rms) from 50Hz to I5kHz at less than 2%THD into rated load impedances Model BPA- 125 125 watts (rms) from 5OHz to 15kHz at less than 2% THD into rated load impedances Frequency Response: Input Sensitivity: Output Regulation: -2dB from 20Hz to 2OkHz High-impedance: 300mV; Low-impedance, balanced: 75mV with accessory transformer Model TL600 Better than 2dB from no load to full load Hum and Noise: Inputs (Impedance): 85dB below rated output High-impedance: 50k-ohms unbalanced; Low-impedance: 600-ohms balanced, with accessory transformer TL600; Line-bridging with accessory transformers TLl00 or TLlOK Output Loads: 8-ohm/25V, 16-ohms,4-ohm/25V, 16-ohms, 25VCT and 70V 25VCT and 70V Lo-Cut Filter: Controls, Indicators; Front Panel: Rear Panel: Power Consumption; I20VAC, 60Hz Full Rated Output: -1OdB 1OOHz (Switch-Selectable) Illuminated Power Switch Input Level Control; Circuit Breaker Reset Switch; Lo-Cut Filter Switch 18OW 360w Overload Protection: I1 AC Circuit Breaker. Thermal Circuit Breaker, Transient Protection Diodes 1 Auxiliary Receptacle: (not switched) Dimensions: Three-wire grounded* 300 watts maximum 15.25”Wx8”Dx3.5”H15.25”Wx8”Dx5.25”H (38.7 x 20.3 x 8.9 cm) (38.7 x 20.3 x 13.3 cm) Finish:I Black Weight: Rack Panel Brackets: 19 lbs. (8.6 kg) RPK-53 27 Ibs. (12.3 kg) RPK-54 Accessories: Model TL600, 600-ohm line-matching transformer Model TLIOO, 1:1 ratio transformer Model TLlOK, 10,000-ohm line-matching transformer *This receptacle will be grounded only if the power amplifier has been grounded properly All specifications subject to change without notice AMPLIFIER 1 G N D COM 25VCT AMPLIFIER 2 GND COM 25VCT AMPLIFIER I AMPLIFIER 2 G N D C O M l6fi G N D C O M lGfI I A74-2021-01 OUTPUT TERMINAL sz it does not control any associated equipment which may be connected to the auxiliary power receptacle on the rear panel. The switch lamp will illuminate when power has been applied to the unit. LO-CUT FILTER SWITCH. The LO-CUT filter switch, located on the rear panel, provides -1OdB attenuation at 100Hz. INPUT LEVEL CONTROL. The INPUT LEVEL control, located on the rear panel, adjusts the input signal applied to the amplifier. Turn the adjustable screw clockwise to increase the level. CAUTION Many loudspeakers may be damaged if overdriven. Therefore, always begin system setup with the input level control fully counterclockwise and gradually in- crease the setting to obtain the desired output level. 4 Figure 4 - BPA-125 Rear Panel Connection Diagram THERMAL BREAKER. If the thermal breaker opens, there will be no audio output; however, the power switch lamp will remain illu- minated. Wait approximately two minutes for the breaker to reset. If it resets and then opens again, investigate the cause of the temperature overload. This may be due to improper connections at the output terminals or to excessive environmental heat with inade- quate ventilation. The thermal breaker will open when the temperature at the output transistor heat sink reaches 105 C. CIRCUlT BREAKER. .If the AC circuit breaker opens, the power switch lamp wiIl go out and the amplifier will have no output; however, there will be power at the AUX POWER receptacle on the rear panel. Set the POWER switch to OFF and momentarily depress the red button on the circuit breaker to reset it. Return the POWER switch to ON. If the circuit breaker trips again, do not attempt to reset it; have the trouble investigated by a qualified technician. MAINTENANCE CAUTION There are no user-serviceable parts within the amplifier. Have all internal servicing performed by a qualifed technician. The warranty will become void if repairs are made by other than the Bogen Service Department or authorized service agency. BOGEN SERVICE Our Service Department is interested in the maintenance of your Bogen equipment. If trouble ever develops, do not hesitate to ask our advice or assistance. Information may be obtained by writing to: Service Department, Bogen Division, P.O. Box 500, Paramus, N.J. 07653. When communicating with us, give the model and series designation of your unit. Describe the difficulty and include details on the electrical connections to associated equipment, such as preamplifiers, speakers, etc. We will send you service in- formation if the trouble appears simple. If the amplifier requires servicing, we will send you the name and address of the nearest authorized Bogen service agency. When shipping the amplifier, pack it well, using the original shipping carton or similar container and filler material to prevent damage in transit. Remove any plug-in transformer from the printed circuit board beforeshipping. Send the unit, fully insured and freight prepaid via UPS or other responsible carrier. The repaired unit may be picked up by you personally or will be returned to you freight prepaid while in warranty. REPLACING COMPONENTS All semiconductor components on the printed circuit board are soldered in place to ensure maximum reliability. When soldering or unsoldering transistors and diodes, use a heat sink (such as a small alligator clip) between the source of heat and the component. When replacing driver and output transistors, be certain to install the case/heat sink insulator, after lightly coating both sides with a thermal conducting compound (such as Dow Corning No. 340, or equivalent). REPLACEMENT PARTS Most components used in the amplifier are standard parts available through reputable parts suppliers. The parts listed here may be obtained through Bogen distributors, service agencies or directly from the factory. When ordering a part, specify the part number and the description, as listed. Specify the model of the unit and give the series designation, which is a letter followed by numbers, located on the rear panel. For parts on the circuit board, also give the component board assembly number, which begins with “45”. TRANS. SKT. XT1 I 0 Figure 5 - BPA-60/BPA-125 Printed Circuit Board PARTS LIST Designation - c2 C3,4 C6 CR1-4 :; ;: Rl R3 R4 R5 Rl8,19 Sl - Cl01 Cl03 Cl04 C201 C202 Part Number Description PC Board 45-7241-05 Ptd. Cir. Bd. Assy. 79-l 19-001 Cap., Elect., 470 F, 63V 79-008-065 Cap., Elect., 10 F, 63V 79-008-062 Cap., Elect., 100 F, 50V 96-5333-01 Diode, 4OOprv 1A 96-5643-01 Transistor, KTC2240 96-5365-01 Transistor, MPSA56 96-5459-01 Transistor, 2N6292 96-5458-01 Transistor, 2N6107 77-001-818 Control, Scr. Adj., 100 kilohm 75-154-124 Resistor, 120 kilohm, W , 1% 75-154-154 Resistor, 150 kilohm, 1/4W, 1% 75-154-334 Resistor, 330 kilohm, 1/4W, 1% 76- 107-096 Resistor, .82 ohm, 2W 81-003-067 Switch, Slide, Miniature 70-9302-01 Clip, Heat Sink (2) Chassis 78-200-l 16 79- 118-002 Cap., Cer. Disc, 0.01 F, 1400V Cap., Elect., 13,000 F, 40V (BPA-125) 79-118-004 Cap., Elect., 8800 F, 75V (BPA-125) 79-118-006 Cap., Elect., 5000 F , 50V (BPA-60) 79-509-056 Cap., Elect., 6000 F , 75V (BPA-60) Schematic Designation Part Number CBlOl 94-0023-10 CB102 94-0014-07 CB201 94-0023-05 CR101 96-5373-01 CR201 -204 96-5241-01 QlOl 96-5213-01 4102,103 96-5385-01 Q104-107 96-5385-01 R101,102 R103-106 76-114-107 76-l 14-102 R107 75-154-182 R109 R201,203 75-742-101 76-l 14-102 R202 75-154-132 SW101 81-009-036 TlOl 83-831-000 T102 83-492-000 T201 83-814-000 T202 83-491-000 - 14-9088-01 6 Description Breaker, Circuit, 4.OA (BPA-125) Thermostat Breaker, Circuit, 1.6A (BPA-60) Rectifier, Bridge (BPA-125) Diode, 300prv 3A (BPA-60) Transistor, 2N5089 Transistor, 2N3055H, RCA Transistor, 2N3055H, RCA (BPA-125) Resistor, 3.3 ohm, 5W (BPA-125) Resistor, 0.27 ohm, 5W (BPA-125) Resistor, 1800 ohm, 1/4W, 1% (BPA-125) Resistor, 100 ohm, 7W Resistor, 0.27 ohm, 5W (BPA-60) Resistor, 1300 ohm, 1/4W, 1% (BPA-60) Switch, Power Transformer, Power (BPA-125) Transformer, Output (BPA-125) Transformer, Power (BPA-60) Transformer, Output (BPA-60) Foot, Rubber