Bogen-CHS100-pa-sm维修电路原理图.pdf

MODEL CHS100 100 WATT TRANSISTOR PUBLIC ADDRESS AMPLIFER . 0 IS1 LEAR SIEGLER, INC. BOGEN COMMUNICATIONS DlVlSlON P.O. BOX 500 PARAMUS, N. J. 07652 INSTALLATION AND OPERATING MANUAL R E A D T H O R O U G H L Y B E F O R E O P E R A T I N G E Q U I P M E N T RadioFans.CN 收音机爱 好者资料库 D E S C R I P T I O N The Bogen Model CHSlOO is a fully transistorized public address amplifier rated at 100 watts. The unit will accommodate two microphone inputs and two auxiliary inputs for a tuner, tape recorder, or phono- graph with a ceramic cartridge. The amplifier will accommodate either high or low impedance micro- phones, and no transformer is required to change from one microphone impedance to the other. Individual volume controls are provided for each microphone input. A fader volume controls selects and adjusts the level of the desired auxiliary input and permits fading between the two inputs. A master vol- ume control regulates the mixed output level. Sep- arate bass and treble controls permit adjustments for tonal balance. Outputs are provided for 2, 8 and 16-ohm speakers and for 25-volt and 70-volt balanced speaker line systems. Two quick-disconnect plugs provide rapid and convenient connections to speakers. The output The CHSlOO amplifier operates from a 105-125 of the CHSlOO amplifier can also be fed to a tape re- corder or booster amplifier. volt AC source, and has a total power consumption of 150 watts. A 1.75-ampere circuit breaker protects the amplifier against overloads. An optional accessory designed to mount on the front panel of the CHSlOO provides two additional corder or tuner. The BRIDGING receptacle can also high or low impedance microphone inputs. A BRIDGING receptacle on the rear panel accepts additional high- be used as a high-impedance output to feed a tape level, high-impedance signals from a unit having its own volume control. such as a preamplifier, tape re- recorder or auxiliary amplifier. The master volume control will not affect the bridging output level. 1 TECHNICAL SPECIFICATIONS POWER OUTPUT: 100 watts at less than 5% distortion. PEAK POWER: 200 watts. FREQUENCY RESPONSE: 40 to 20,000 Hz 2 db. SENSITIVITY: Hi Z MIC, 4 mv; Lo Z MIC, 0.3 mv; AUX, 0.3 volt; Bridging, 1 volt. HUM AND NOISE (below rated output): MIC input, 65 db; AUX input, 70 db. INPUTS: 2 MIC, high (100 K ohms) or low (200 ohms) impedance; 2 AUX (300 Kfi); Bridg- ing (high impedance). OUTPUTS: 2, 8, 16 ohm speakers; 25 volt CT balanced (m); 70 volt balanced (4%); TAPE or BOOSTER, 10K at 5V; Bridging, high im- pedance at 0.5V. CONTROLS: 2 MIC volume; 1 AUX volume (fader for two inputs); MASTER volume; BASS, TREBLE tone; POWER switch and indicator. TONE CONTROL ACTION: Treble (at 10 K Hz), t 11 db to -12 db, Bass(at 50 Hz), +10 db to -10 db. POWER REQUIREMENTS: 105 to 125 volts, 50 or 60 cycles AC, 150 watts. SEMI-CONDUCTORS: 10 silicon transistors, 2 diodes. DIMENSIONS: 15” wide x lO” deep x 5” high. SHIPPING WEIGHT: 24 pounds. A C C E S S O R I E S PMA-2 ADD-ON PREAMPLIFIER The Bogen Model PMA-2 Preamplifier is designed to provide two additional microphone channels for the CHSlOO amplifier. Each preamp channel has its own volume control and will accommodate either high-im- pedance or low impedance microphones. The unit is connected to the Preamp Accessory socket on the top chassis of the CHSlOO amplifier. When installed, the PMA-2 control knobs protrude through the front panel of the CHSlOO amplifier. especially for matching either inputs from or outputs to a 500/600 ohm line. As an input matching trans- former it may be used with the Bogen amplifier for distributing background music which has been trans- mitted over leased telephone lines. The, accessory also functions as an output matching transformer in feeding special program material over a 500/600 ohm telephone line for transmission to a local broadcast studio. LVP-I ACCESSORY WMT-I LINE MATCHING TRANSFORMER The Bogen Model LVP-1 is a plug-in accessory The Bogen WMT-1 line input/line output matching which permits the user to provide microphone prece- transformer is an accessory which has been designed dence when used with a customer supplied switch -2- RadioFans.CN 收音机爱 好者资料库 and the Bogen amplifier. The LVP-1 may also be used as a remote volume control in conjunction with the Model RVC-1 remote volume control. ing a dual-stylus turnover cartridge is included with record player. LK-IO CONTROL GUARD LOCKING PLATE RVC-I REMOTE VOLUME CONTROL The Bogen Model LK-10 control guard locking The Bogen Model RVC-1 accessory permits the plate is designed to prevent unauthorized tampering amplifier to provide remote volume control when used with the controls of amplifier. It comes complete with in conjunction with LVP-1 accessory. two sets of keys. The key cannot be removed when MODEL LPC-4 PHONO PLAYER TOP the lock is in open position. Model LPC-4 is a complete four-speed phono- RPK-27 RACK PANEL player designed to be mounted directly on top of the The Bogen Model RPK-27 rack panel kit is de- amplifier. The unit comes complete with all necessary signed to mount the CHSlOO amplifier (with or with- hardware, and can be easily installed and connected out the PMA-2 preamplifier) in a standard 19” x 7” to amplifier with only a screwdriver. A tone arm hous- rack. The rack panel is finished in gray enamel. INSTALLATION UNPACKING power cables. Inspect the shipping container and amplifier for indications of improper handling. The amplifier was carefully checked before leaving factory. If the unit has been damaged, make an immediate claim to the dealer or distributor from whom it was purchased. If the amplifier was shipped to you, notify the trans- portation company without delay and place your claim. POWER AND GROUNDlNG CONNECTIONS BETWEEN COMPONENTS For high-impedance inputs, use single-conductor, low-capacity shielded wire for connecting the record player, tape recorder, and other components to the amplifier. Keep leads under ten feet in length. For low-impedance microphone inputs, use single- conductor shielded wire, in lengths from 50 to 500 feet depending on the characteristics of the micro- phone. The amplifier is furnished with an AC line cord terminated in a three-prong plug. Plug the line cord into a three-wire grounded outlet providing a nominal 120-volt, 50-60 cycle power source. This will ground the amplifier as well as supply power to it. It is advisable to ground the amplifier. Therefore, if a three-wire outlet is not available, an adapter such as Leviton No. 5017 should be used to convert a stand- ard two-wire outlet for use with three-wire plugs. The adapter is provided with a grounding pigtail which should be connected to the screw holding the wall plate to the receptacle, as shown in figure 1. Speakers may be connected with standard flex- ible line cord (zip-cord), and up to 100 feet of cable may be used without appreciable loss. Make certain that all input cables are kept away from speakers cables, power cables, and power trans- formers, and that speaker cables are kept away from In some areas, the wall plate screw is not grounded. In this case it will be necessary to connect a grounding wire between the GND ter minal on the rear chassis of the amplifier and a water or steam pipe. NOTE INPUT CONNECTIONS MICROPHONES Two microphones may be connected to the am- plifier, and either or both may be used simultaneously. Either high or low-impedance microphones may be used. The amplifier is shipped with an adaptor in the microphone receptacles, which permits high-impedance microphone inputs either from a phone plug or from a standard MClF microphone connector. Figure 1 -Grounding Line Cord Adapter HI Z: Connect a high-impedance microphone (10,000 ohms or more) to the MIC 1 HI Z receptacle on the rear panel of the amplifiet (see figure 2). Connect a second high-impedance microphone to the receptacle marked MIC 2 HI Z. Use a single-conductor shielded cable, terminating either in a phone plug or a standard microphone connector (Amphenol 75-MClF or equiv- alent). Remove the adaptor from the microphone re- ceptacle when the phone plug is used. The cable length from the microphone to the amplifier should be kept under 10 feet. LO Z: Connect low-impedance microphones (600 ohms or less) to the LO Z terminal strip on the rear panel (see figure 2). Use a single-conductor shielded cable. The conductor is connected to the MIC 1 terminal and the shield to GND. Connect a second low-impedance microphone to the terminal strip in the same manner, with the high side of the cable to the MIC 2 terminal -3- and the shield to GND. Low-impedance microphones CAUTION may be used with cable lengths from 50 to 500 feet, Remove the adapter plug from the microphone depending on the characteristics of the microphone. receptacle when thelow-impedance input is used. Figure 2 -Rear View CHS100 Amplifier PHONOGRAPH Phonographs employing a ceramic or crystal type cartridge may be connected to either the AUX 1 or AUX 2 receptacle. Use single-conductor shielded cable terminated in a standard single-prong phono plug. It is recommended that a separate ground wire be connected between the phono player base and the GND terminal on the Output Terminal Strip on the rear panel of the amplifier (see figure 2). This is not re- quired when using the Bogen Model LPC-4 phono player accessories. AUXILIARY A radio tuner, tape recorder or any other high- level, high-impedance signal source may also be con- nected to the AUX inputs. An input level of at least 0.3 volts is required to obtain full output from the amplifier. The input from a 500/600-ohm line is also con- nected to the AUX receptacle through a WMT-1 line matching transformer. For detailed connections, see the instruction sheet furnished with the Bogen Model WMT-1 accessory. REMOTE VOLUMECONTROL Each of the three input channels may have its volume controlled remotely by utilizing Bogen LVP-1 and RVC-1 accessories. Remote control permits ad- justment of volume from distances up to 2,000 feet. The LVP-1 unit is plugged into the appropriate REMOTE ACCESSORY SOCKET, located on the top chassis (see figure 3). It is necessary to remove the top section of the amplifier cage to reach the accessory sockets. This is done by loosening the two sheet metal screws at the rear of the amplifier and lifting the top section off. The leads from the RVC-1 accessory are con- nected to the MIC 1, MIC 2 or AUX terminal and GND on the REMOTE CONTROL PRECEDANCE strip on the rear panel (see figure 2). Complete installation information is contained in the instruction sheet fur- nished with the LVP-1 and RVP-1 accessories. MIC 2 (LVP-I) MIC I (LVP-I) Figure 3 - Location of Accessory Sockets -4- MICROPHONE PRECEDENCE Each of the microphone channels can be con- nected to provide precedence over the AUX channel by means of the Bogen LVP-1 accessory unit and an ordinary single-pole, single-throw switch. The LVP-1 accessory is plugged into the AUX REMOTE AC- CESSORY socket on the top of the chassis (see figure 3). Connect the switch to the MIC 1 or MIC 2 terminal on the REMOTE CONTROL PRECEDENCE strip on the rear panel (see figure 2). For complete installation information, see the instruction sheet furnished with the LVP-1 and RVP-1 accessories. WMT-I ACCESSORY INPUT To connect the input from a 500/600-ohm line, mount the WMT-1 transformer on the WMT-1 mounting holes on the rear chassis (see figure 2). Connect the 500/600-ohm input to the three-screw terminal board on the accessory. Connect the phono plug on the WMT- 1 to the AUX 1 or AUX 2 input of the amplifier. NOTE If another sound source has been plugged into the AUX input, the WMT-1 may be connected to the MIC input of the amplifier. However, the WMT-1 wiring must first be modified, as de- scribed in the instruction sheet furnished with the accessory. AUXILIARY POWER The auxiliary power receptacle is a three-wire grounded outlet. Hence, any associated equipment con- nected to it with a three-prong line cord will be ground- ed, providing the amplifier line cord has been properly grounded. Both the amplifier power switch and the phono on-off switch must be used in turning off a re- cordplayer connected to the auxiliary receptacle. Flats may develop on the idler wheel of the phonograph if only the amplifier power switch is used to stop the record player. SPEAKERS The amplifier may be used with speaker systems rated at 2, 8 and 16 ohms and with 25-volt and 70-volt constant-voltage speaker systems. For detailed in- formation on the installation of multiple speaker sys- tems, refer to the Speaker Installation Instructions (No. 54-5001-02) included with this unit. In installations where speakers will remain con- nected to the amplifier permanently, connect the speak- er directly to the output terminals on the rear panel (see figure 2). Connect one lead to the terminal cor- responding to the speaker systems impedance and the other lead to COM 1. For 25-volt operation, connect leads between 25 V (6-8 Q) terminal and COM 1. For balanced 25-volt operation, remove the shorting link between COM 1 and GND. Connect the high sides of the balanced line between the 25 V (6-8 Q) and the COM terminals. The balanced line ground is connected to the 25 VCT (1.5-2 a) terminals. For 70-volt operation,connect the speaker line leads to the 70 V (4912) and COM 2 terminals. Con- nect a jumper between the COM 2 and GND terminals, if grounding is desired. For balanced line operation, disconnect the jumper between COM 2 and GND. For installations that are moved constantly, con- nect the speaker to the speaker socket on the rear panel. Two speaker plugs (Bogen Part No. 85-0147-01) are furnished with the amplifier for use in making connections to the speaker sockets. O U T P U T C O N N E C T I O N S For standard impedance loudspeakers and 25-volt systems, connect the speaker line leads to pins 1 and 2 of the plug. Connect the wired plug to either speak- er socket, then attach the impedance selector to the appropriate output terminal which corresponds to the impedance of the loudspeaker. For 25-volt systems, the impedance selector is attached to the 25 V (6-812) terminal. For 70-volt operation,the speaker line leads are connected to pins 2 and 3 of the speaker plug. Connect the impedance selector to the COM 2 terminal. BRIDGING OUTPUT The BRIDGING receptacle on the rear panel pro- vides a high-impedance output to feed a tape recorder or auxiliary amplifier. The MASTER Volume Control will not affect the bridging output level. WMT-I ACCESSORY OUTPUT By utilizing a Bogen WMT-1 bridging transformer, a zero-level output at 500/600 ohms may be obtained for feeding a telephone line. The WMT-1 accessory is connected to the WMT-1 HI Z output jack on the rear panel. See the instruction sheet furnished with the WMT-1 transformer for complete installation directions. TAPE OR BOOSTER AMPLIFIER To drive a booster amplifier or tape recorder, con- nect a patch cord (with a standard pho