Dukane 1A729 & 1A731 Mixer-Amplifier 电路图.pdf

SECTION 1 GENERAL INFORMATION 1.1 INTRODUCTION This manual provides installation and service information for the Dukane Model lA729 60-Watt In-Wall Amplifier, and the Dukane lA731 120-Watt In-Wall Amplifier. These amplifiers are manufactured by Dukane Corporation, St. Charles, Illinois 60174. This manual is divided into three sections, as follows: 1. General Information. 2. Installation Information. 3. Service Information. 1.2 GENERAL DESCRIPTION The Dukane Models lA729 and lA731 transistorized in-wall amplifiers are designed for use as complete sound distribution systems providing standard 25-Volt or 70-Volt speaker line output, input facilities for up to eight microphones, a radio tuner and phono input. These amplifiers have a power output of 60-Watts and 120-Watts respectively. An Octave Filter (438-496), Compressor (436-408). Dual Microphone Expander (438-407). and Remote Volume Controls may be installed as options at the output for improved sound reproduction. Terminals are provided for each option. 1.3 TECHNICAL SPECIFICATIONS Power Output: MODEL lA729: 60-Watts (RMS) MODEL 1A731: 120-Watts (RMS) Distortion: Less than 2% at rated power output, from 40 to 20 kHz. Frequency Response: 40 to 20 kHz 2dB. Envelopemeasured at -6 dB from full output on 70 V line. Power Source: 105-125VAC. single phase, 50-60 Hz. Power Required: MODEL 1A729: 150 Watts at rated out- put, 30 Watts at idle. MODEL 1A731: 240 Watts at rated out- put, 40 Watts at idle. Fuse: MODEL 1A729: (1) 1.5 Ampere Slo-Blo MODEL 1A731: (1) 3 Ampere Slo-Blo Noise Level: Microphone: Better than 60dB down from 300 uV reference input. Auxiliary: 75 dB below output. Inputs: (4) microphone, low impedance (4) optional microphone inputs (2) auxiliary high impedance inputs Input Sensitivity: Microphone: 300 uV maximum. Auxiliary: 0.4 V rms. l - l RadioFans.CN 收音机爱 好者资料库 ? ? ? 2.3.2 Option Mounting The option packages available have complete instructions and hardware included for mounting and connections. See individual packages for related literature. 2.3.3 Amplifier Mounting Mount the amplifier chassis into the backbox using the four #10-24 studs and nuts supplied (Figure 2-l). DO NOT install the Front Door Panel at this time. 2.4 ELECTRICAL CONNECTIONS Cut all wires to length and strip wire ends as required. Make all external connections to screw terminals on strips inside this unit (Figure 2-2). CAUTION Connect AC power to this amplifier AFTER all connections have been completed. 2.4.1 Grounding It is good practice to ground this amplifier to the backbox which is, in turn, connected to the conduit and electrical ground (street-side of meter, cold water pipe). To be sure grounding exists between the unit and the backbox, place an outside toothed lockwasher under each mounting nut. 2.4.2 Balanced Microphone Inputs Connect microphone center wire to MIC 1 and the shield side of the wire to the center terminal marked SH (Figure 2-3). Connect the second microphone to MIC 2, and the shield to the center terminal. Use only shielded wires for microphone connections. Figure 2-3. Balanced Mic Center Connections. 2-4 RadioFans.CN 收音机爱 好者资料库 2.4.3 Singleended Microphone Inputs Connect the microphone center wire to a microphone input MIC “N” and the shield to the SHLD center terminal with a jumper wire from SHLD to the unused MIC terminal (Figure 2-4). IF ;SED Figure 2-4. Single-Ended Mic Connections. Connect all unused microphone inputs to the shield common terminal (Figure 2-5). SHLD Figure 2-5. 2.4.4 Auxiliary Program Input Unused Mic Connections. Connect the auxiliary program input (from AM/FM tuner, phono, or tape player: to AUX 1 Connect the shield to the center terminal (Figure 2-3, 2-4). NOTE A second auxiliary program input can be connected to AUX 2 terminal with the shield connected to center terminal. Either auxiliary program can then be selected by the front panel controls. 2-5 2.4.5 Output For all single-ended operation connect common to ground (Figure 2-6). Other terminals (8, 16 Ohms; 25, 70 Volt) are used for present output circuits. Figure 2-5. Speaker Line Connections. 2.4.6 Amplifier Modifications Certain custom modifications to the in-wall. amplifien can be made if desired. Refer to Figure, 2-7 for information. 2.4.7 Power CAUTION Set all volume controls to “0” before switching on AC Power. NEVER turn up the amplier without an output load; e.g. speakers (matched). Plug in the 3-prong AC power plug into the receptacle on the handi-box within the back- box (Figure 2-l). The SO-Watt amplifier is protected by an externally removable 1.5 Ampere slo-blo fuse and en internal 3 Ampere slo-blo fuse. The 120-Watt amplifier is protected by an externally removable 3 Ampere slo-blo fuse (Fig. 2-2). and an internal 5 Ampere slo-blo fuse. 2-S Repair Parts List - Chassis Mounted Parts (1A729) Legend Description Dukana Part No. C103, C104 C105, C106, C l 0 7 C108, Cl09 C l 1 0 Cl11 C112 C113 CR101 F101 F102 LED101 Ml01 cl101 Q102 R101, R102 R103, R104 R105 R107, R109 R108 R112 R113 R114 R115-R122 R123, R124 S101 S102 S103 T101 T102 Capacitor, 65OOuF. 50WVDC, Lytic 199-2030-658 Capacitor, .OluF, 14OOWV. Disc Car. 199-9255 Capacitor, 25OuF. 5OWVDC, Lytic 199-2048-257 Capacitor, .015uF, lOOWVDC, Mylar 199-4043-l 53 Capacitor, 2OOOuF. 5OV. Lytic 199-2048-208 Capacitor, .033uF, lOOV, Mylar 199-4043-333 Capacitor, 6.8uF. 35V, Tant. Lytic 199-2036-685 Rectifier 595-74 Fuse, 1.5 Ampere, 125V320-010-0150 Fuse, 3.2 Ampere, 125V, 3AG 320-019-0320 Diode Light Emitting 230-8004-001 Meter VU 485-2014 Transistor, Power; 2N5882 720-39 Transistor, Power; 2N5880 720-109 Resistor, 1OOK Ohm, l/2 Watt, 5% 600-0073-104 Resistor, 750 Ohm, 1/2 Watt, 5% 600-0073-751 Resistor, 910 Ohm, l/2 Watt, 5% 600-0073-911 Resistor, .22 Ohm Wire, 5 Watt, 5%. WW600-1050-R22 Resistor, 20 Ohm Wire, 3 Watt, 10%600- 1050-200 Resistor, 15 Ohm, 5 Watt, 5% 600-1050-150 Resistor, 100 Ohm, 5 Watt, 5% 600-1050-101 Resistor, 1800 Ohm, 1 Watt, 5% 600-01 IO-182 Resistor, 620 Ohm, l/2 Watt, 5% 600-0073-621 Resistor, 51 Ohm, l/2 Watt, 5% 600-0073-510 Switch, Toggle SPDT 680-733 Switch, AC Output 680-720 Thermostat 7 0 2 - I Transformer, Power 710-4239 Transformer, Audio Output 710-2163 Power Cord 200-204 Knob 440-303 Receptacle, Crimp Style, 3 Terminal 597-240-0003 Receptacle 597-240-0004 3 - 4