Altec Lansing 771B Operating Instructions Manual Download Page 1 | Manualshive

Page: 1 / 19

background image

1
2
3
...
»

Summary of Contents for Lansing 771B

Page 1: ...ifiers drive the LF and HF spea kers The electronic crossover is placed ahead of the dual power amplifiers so that ful I biampl ifier output is distributed to the speakers Standard input connections are direct coupled Transformer isolation of the input is accomplished with an optional plug in transformer Input inter connecti9n phono jacks 7718 on Iy permit connecting up to 20 b iampl ifiers into a...

Page 2: ...IVERPCB ASSEMBLY CROSSOVERPCBASSEMBLY DATA CONTENTS Page 3 4 4 4 4 4 6 6 6 7 8 8 8 9 9 9 9 10 10 10 16 16 17 18 19 2 Graphics 771BCover Photograph Table I Operating Controls and Features Figure No Controls and Features 2 Speaker Hookup and 771B Interconnections 3 Biamplifier Interior 4 Typical Solid State Component Configurations 5 Power Transistor Installation 6 Schematic 771B Electronic Crossove...

Page 3: ...ith 12 dB octave slope 1 dB from 20 Hz to 20 kHz nor malized composite output 80 000 ohms direct 600 ohms with 15356 or 15095 transformer 8ohms nominal foreachamplifier 25 80 dB below rated output 1 BASS GAIN CONTROL con tinuously variable 6 dB to 15 dB 1TREBLE GAIN CONTROL con tinuously variable 6 dB to 15 dB 3 Controls Cont d 1 ELECTRON IC CROSSOVER FREQUENCY switch 500 Hz 800 Hz 1500 Hz 1 POWER...

Page 4: ...signal Each GAi N CONTROL control is continuously variable from 6 to 15 dB Raise controls for gain potentiometers lower controls for attenuation Controls are Iinear slide type potenti ometer z FROM MIXER Connects direct coupling input signal from mixer preamplifier or other PREAMPLIFIER input device Model 771B can accept an input signal from another 771B jack for 771A 3 INPUT Provides alternate di...

Page 5: ...Model 7718 Model 771BX Side and Rear View Figure 1 Controls and Features 5 ...

Page 6: ... I I I I I 771 B BIAMPLIF IER CO M HF COM LF I LIN E I POWER I I I I I L _ l E L U _J Figure 2 Speak e r Hookup and 771 B lnt ercon nec tios INSTAL LATION The 7718 and 771BX are designed to be installed at a convenient location int he speaker e nclosure If in stallation is made in an ex isting spea ker system the passive crossover net work a Iread y pre se nt in the system must be remo ved because...

Page 7: ...rvice Representative NOTICE REPAIR PERFORMED BYOTHERTHAN AUTHOR IZED WARRANTY STATIONS DEALERS OR OTHER QUALIFIED PERSONNELSHALLVOID THE WARRANTY PERIOD OF THIS UNIT TO AVOID LOSSOF WARRANTY SEEYOUR NEAR EST ALTEC AUTHORIZED DEALER OR CALL ALTEC CUSTOMER SERVICE DIRECTLY AT 714 774 2900 OR WRITE Customer Service ALTEC 1515 South Manchester Avenue Anaheim California 92803 7 ...

Page 8: ...Q2 HF Q3 and Q4 LF see Figures 3 and 5 Imprope r ad justment of these controls resu I ts in disto rti on a t the crossover frequenc y To adjust either Rl 2 or R13 use the fol lowing procedure 1 Verif y Iine power is turned off then remove chassis cover 2 If adjus ting R12 se t a de VTVM to scale that will conven iently read 20 mV and co nnect its positive lead to Q 1emitter and its ne gat ive lead...

Page 9: ...see Figure 4 Before removing a solid state component from tie points or from a PCB sketch the lead orientation with respect to the tie points or PCB Form the leads of the new component to conform with the leads of the part being replaced to aid in making proper connections Beforeremoving small transistors note position of index tab with respect to the PCBor socket Cut the leads of the new transist...

Page 10: ...ics are shown in Figures 9 11 and 13 Before removing PCB components for testing or replacement read and heed the fol lowing instructions 10 1 Solid state components and PCBsmay be damaged by excessive heat Use a small soldering iron with a 1 8 inch diameter chisel tip Use small diam eter 60 40 rosin cored solder 2 Remove components by placing soldering iron on component lead on conductor side of P...

Page 11: ...AI SCBAI r I 201 CA4 3A200 CA 5 85V BASS Al 10K R2 IK 52V 3A200 Cl 5 0 c 6200 75V 1 3 5000 60V I f E 52V I QP IVER 7 1 1 J J I27 t 456 1 p It 11 S i 1 4 r11 J I I ff rl 7 8 1 L_ F E DAIi EA BOAP O 7 I 27 0t 042244 I 6 1 t I jE 1 I j ff I c L_ C7 p7 AIO 5 5W N 1 Al2 2 2K l 2W TB1J H F L F L F COM H F COM Figure 6 Schematic 3D212 1 771B Electronic Crossover Biamplifier eu i oa f 2oo SCHEMATIC Bl AMP...

Page 12: ...42244 G f j 1 j i CA4 85V Jo l I S2V CR 5 i 3A200 Ic1 c2l l 3 oo 620 0TTsooo V 75V 60V I L _ j C7 p7 Al2 2 2K 112w TBII H F L F L F COM H F COM _ QI f t L 1 i2 OP Sft 1i fl HIGHEST l1G FERENCE DE 51GNATl0N USEO Al2 CB CAIi 04 Tl 52 A3 P3 REFERENCE OESlGNAil ONS NOT USED I I I C HL 1 o j SCHEMAT IC 771BX B AMPU FIER ALTEC 3 3Wli H s iHOWrJ IN 10 05 ITI C A T T IC N CY 2 CAPACITOAS ARE GIVEN IN MIC ...

Page 13: ...oov R32 RI IK 18K f C 4 470Pf CZ R3 R30 4 7K R4 20 R7 100 C3 5 50V r J2 B r B J2 7 C5 47 R9 18K RIO 47K R29 330 CR2 IN456A Rl4 10 04 41440 C9 47 Rl7 100 CIO 7 07 39390 R26 I 0 CII 01 4 IN456A CR5 IN 6A R27 100 R20 R23 Cl3 4 7K 2 2K 50 SOV Cl2 01 R24 120 CR7 TA IO J2 6 J2 5 OUTPUT JZ 4 CR6 TA 10 50 SOV t GNO JZ I c t J2 10 J2 9 Figure 9 Schematic 2D544 7 LF Power Driver PCB Assembly 13 N u 0 lO u 0...

Page 14: ...y RS 3 3K R6 3 3K CRI TAIO R4 470 s7 ov C4 2 0V cs 117 C6 50 5 BIAS ADJ C7 5 SOV 39390 r i l 2W RII 18K l 2W Rl2 500 CRZ TAIO 8 Rl4 Rl9 3 3K 100 5 OUTPUT 4 CR3 TAIO GND I 9 Figure 11 Schematic 20545 4 HF Power Driver PCBAssembly 14 0 e5T e FP J e5 d M4710 l SU5ED B I a e fl I T I ezo I I I IA P e E S M477dA SA4 T4 1Z I I I I I I ...

Page 15: ...627 RS 3 3K B 7 R20 IK 51 C L F OUT t 2 C9 25 25V 5 r cs R7 18K 57 C4 25 25V 012 57 RIG 4 7 K Rl7 22K Rl4 39K 57 C6 21 C7 H F OUT 012 33K 012 t 4 5 1 5 57 R9 RII CIO 25 ISK 18K 25V 57 10 S I B 9 RG 7 8 Rfq 22 K HIGHEST REFERENCE D ESIGNATORUSED R24 I CID I 03 I 51 I I I 7 I 4 7K 8 GNO REFERENCE DESIGNATION NOT USED R 15 3 GND Figure 13 Schematic 3C066 2 Crossover PCB Assembly 15 IR 18 I I I I I 7 ...

Page 16: ... only S1 771BX only S2 771BX only Tl 771B CR6 7 9 10 48 01 109275 01 Diode Zener only Tl 771BX CR8 11 F1 2 F3 4 771BX only Jl J2 771B only 1N746 3 3V 10 400 mW 48 01 107429 01 Diode stabistor 3 pellet 51 04 100462 0l Fuse 1 4A 3AG 250V 51 04 100464 01 Fuse lA 3AG 21 01 114347 01 Jack 21 01 114347 01 Jack only TB9 TBl1 Wl 2 16 Ordering Name and Number Description 21 02 100973 01 Socket octa I 48 03...

Page 17: ... CR1 2 3 4 5 48 01 107017 01 Diode 1N456A 2W 25V 100 mA Rl4 47 01 102140 01 Res 10 0 10 CR6 7 48 01 102592 01 Diode l 4W CR8 48 01 110786 01 Diode Zener 23V Rl5 47 01 102147 01 Res 47 0 10 5 2W l 4W Jl 21 01 109731 01 Jack phono Rl8 19 Ql 2 48 03 110773 01 Transistor PNP 50V 20 30 47 01 102171 01 Res 4 7K 0 10 Q3 7 48 03 107447 02 Transistor 2N5320 1 4W NPN 10W 75V R21 47 01 102156 0l Res 270 0 10...

Page 18: ...0l Cap 50 µF 50V R5 6 15 17 47 01 102169 0l Res 3 3K Q l0 ca 15 02 107454 01 Cap 100 pF l0 l 4W l00V R7 21 47 01 102163 0l Res lK Q 10 C9 15 02 100302 0l Cap 470 pF l0 l 4W l00V CRl 2 3 48 01 102592 0l Diode R9 47 0 l 102183 0 l Res 47K Q l0 l 4W Jl 21 0 l 109731 0 l Jack phono Ql 2 48 03 108557 02 Transistor 2N5367 Rl0 11 47 01 102359 01 Res 2 2K Q l0 l 2W PNP 0 36W 40V Q3 7 48 03 107447 02 Trans...

Page 19: ...50V Cap 25 JJF 10 R8 10 21 25V Cap 0 025 JJF 5 R9 lO0V Cap 0 012JJF 5 Rl3 lO0V Transistor Rl4 Res lM Q 10 l 4W Rl6 19 Res l00 K Q l 0 l 4W R20 Res 220K Q 10 l 4W R22 24 Res 3 3K Q l0 l 4W R23 Res 22K Q 10 l 4W Sl 19 Ordering Name and Number Description 47 01 102108 01 Res 18K Q 5 l 4W 47 01 102114 0 l Res 33K Q 5 l 4W 47 01 102106 01 Res 15KQ 5 l 4W 47 01 102123 01 Res 68K Q 5 l 4W 47 01 102116 01...

Reviews:

No comments

Related manuals for Lansing 771B

Brand: JBL Pages: 20

Brand: GAI-Tronics Pages: 24

Brand: Maintronic Pages: 4

S-3 Anniversary

Brand: Gold Note Pages: 13

Brand: PrimaLuna Pages: 8

Brand: Hogtunes Pages: 12

Brand: Marantz Pages: 10

Brand: McIntosh Pages: 28

Brand: Radio Shack Pages: 7

Brand: GAS Pages: 12

Brand: CyberData Pages: 2

Brand: Powerwave Technologies Pages: 33

Brand: Inter-m Pages: 8

Direct-A-Com Series 3 470

Brand: NuTone Pages: 11

Brand: Rotel Pages: 9

Brand: Rane Pages: 4

Brand: Dangerous Music Pages: 11

Evolution EV1500M

Brand: Boss Pages: 16

Brands by name

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Popular brands

Load more brands