Pioneer SX-770 Page 25 Installation, Operating And Service Manual Download | Manualshive

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Summary of Contents for SX-770

Page 1: ...s Model You can be sure it will give you many years sx 770 of listening fleasure To get the most manual and follow Happy listeningl from your SX 770 read through this its directions INSTALLATION OPERATING AND SERVICE MANUAL lncluding PABTS LIST CtRCUtT DIAGRAMS TROUBLE SHOOTING AND MOUNTING TEMPLATE KCW ...

Page 2: ...TIVE AM TUNER Due to the silicon transistor and ferrite antenna the AM tuner has a high and stable sensitivity MICROPHONE TERMINAL FOR A VERSATILITY OF USE lnputterminalsincludeamagnetic cartridge turntable terminal andamicrophoneterminal Outputterminalsincludeacenterchannel terminal and a preamplifier terminal Thus Model SX 770 can be used in various ways WELL DAMPED CLEAR SOUND The output stage ...

Page 3: ......

Page 4: ... v 67 18 1g 28 29 3CI I 2021 10 11 12 13 14 t5 22 23 16 24 2s 11 3637 38 Fig 3 H GH FM BALA FILIER MUTING AFa NoPl r oFF OFF OFF a OCO t T i rurlr rc sE LEprcr FM ApTO PHONO MIC r _ o TA PE vO rop MODL LOuDNF SS VOL N4E t r Vll Eqi q Fig 4 ...

Page 5: ... 23 extension cord separately available o When desiring to connect two stereo headphones use PIONEER s Model JB 22 Y cord separately arailable 7 BASS CONTROL As this knob is turned clockwise bass is boosted as turned counterclockwise attenuated The control is designed to give a flat characteristic curve when the knob is set to the middle of the rotation range o This knob controls the tone quality ...

Page 6: ... upper jack is for the left channel the lower jack for the right channel When connecting a monoph_ onic tumtable use the upper jack 28 AUXILIARY TERMINALS These facks are used when connecting the output cords of a cartridge tape player Also use these jacks for reproducing the audio output of a TV receiver The upper lack is for the left channel the lower lack for the right channel 29 GROUND TERMINA...

Page 7: ... expand the horizontal section of the T type antenna While actually receiving broadcast determine the direction of the horizontal section for the best radio reception and fix it on a wall or other place Refer to the article RECEPTION OF FM BROADCAST regarding the determination of the antenna direction When using the receiver far from the broadcasting station behind a mountian or within a ferroconc...

Page 8: ...bte has a crystal or ceramic cartridge connect the output cords to the PHONO CER TERMINALS 27 tnsert the output cord plug for the left channel into the uppel terminal jack and that for the right channel into the lower terminal jack When using a monophonic turntable connect its output cord to the upper left channel terminal NOTE lf the output cord plug of the turntable to be connected does not fit ...

Page 9: ...MONO position When the knob is in this position however stereo programs are received as monophonic programs 6 When good radio reception cannot be attained by the above operating procedures 1 to 5 reconsider the antenna referring to the arricle ANTENNA CONNECTION AND GROUNDING When using the cartridge tape player PIONEER s Model H 60E connect its output to the AUXILIARY TERMINALS 28 The connecting ...

Page 10: ...n not be used for the tape recording The recording level should be adjusted by the control of the tape recorder or tape deck NOTE When using a monophonic tape recorder signals of either left or right channel only can be recorded PLAYBACK set the TAPE MONITOR SWtTcH 13 to the oN position Adjust the VOLUME BASS and TREBLE CONTROLS for de sired sound volume and tone When the TAPE MONTTOR SWITCH 13lis...

Page 11: ...sr lwrrffR By connecting a microphone The output of a microphone can be connected to the micro phone jack located on the front panel The microphone can be used simply after setting the SELECTOR Knob to the PHONO MIC position When the microphone is crnnected to the iack however the turntable output is disconnected from Model sx 770 NOTE 1 The microphone to be used should have a high impedance 2 Oth...

Page 12: ...ight por tion of S curve will be come the steepest and ad lust the secondary core so that the center of S curve will coincide with the cent er of the marker 2 12 4 Connect output terminal of front end 3 4 to 3 terminal of Tuner Unit 5 Signal Generator 90MHz 20dB 40OHz 3oo ol 90MHz VTVM Oscilloscooe L3 Adjust for maximum de f lection FM antenna terminal 16 6 Signal Generator 106MHz 20dB 400H2 3oo o...

Page 13: ...times STEPS I nput Dial Setti ng Output Equipment Connections Alignment Equipment Connectors Frequency Level Adjust Remarks 1 Sweep Generator Antenna terminal through dummy 455kHz 50dB Point of no i nterference as near as 525kHz VTVM Oscilloscope T5 T6 T7 just for maximum sensitivity and sym metrical characteristics 10 2 Signal Generator 600kHz 30dB 600kHz Oscilloscope T8 Adjust for maximum def le...

Page 14: ...reo head phones jack Simultane ous tape Recording jacks equipped with TAPE MONITOR sruitch Tape recording playback jack DlN type PHONO RIAA BASS boost 1 3dB cut lztdB at 50 Hz TREBLE boost 1O dB cut 9dB at 1 okHz HIGH cut 9dB at 1OkHz ON OFF boost 12 dB at 50 Hz Boost 7 5 dB at 1okHz with VOLUME control set at 40 dB FM SECTION Circuit Front end using F E T Frequency Range 87 5 108 MHz lH F Usable ...

Page 15: ...ference lf the cause of such noise is in the TV set increase the distance between the TV set and receiver Static noise in FM recep tion in particular when automobiles run close to the housel a White noises generated from automobile engines a Radio frequency sewing machine or weld ding machine being used near your house ln an area surrounded by hills or high buildings the FM input signals are very ...

Page 16: ...PARTS LAYOUT BOTTOM VIEW AUX GND IAPE IAPE REC P C FM HIGI AFC M iING FLTER TREBL SPEAXEF SELECTOR BASS POWFR SW IaH O oo 03 O OC FEAD AMP NIT wi5 0 2 r Ocv r_ TINEF UN T l Ol rr5or2 o o o POWER SIPPLY UN w16 024 r NER UN I J ...

Page 17: ...2M v w w w w w 3W 3A w w RFTaPS 1M K RF PS 1M K RF I4PS lOOK K R F PS 1 OOK K RF 4PS 68K K RF PS 68K K w52 004 0 RF14PS 33K K RF PS 33K K RF PS 3R9K K RF PS 3R9K K RF PS 1K K RF PS 1K K RF PS 39K K RF PS 39K K RO3P 150 K RO3P 150 K RF PS 1K K RFy4PS 1M K RFy4PS lOO K RF 2PS 2R2M K MISCELLANEOUS Symbol Description Part No FM FRONT END TUNER Unit MPX Unit HEAD AMP Unit CONTROL AMP Unit MAIN AMP Unit...

Page 18: ...PS330 K R F aPS1OK K RF PS1 R8K K RF 4PS1oK K RFIZPS63K K R F74PS39K K R F7oPS4R7 K K RFlrPS2R7K K RF PS22K K TRANSISTORS RESISTORS Symbol Description Part No R1 R2 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 Carbon film Carbon f ilm Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film 100K 1M 47 4 7K 15K 1K 1M 10K 3 3K 10K 100 150K RDIAPS l...

Page 19: ...ol Description Part No L1 L2 L3 LPF LPF l9kHz Coil 19kHz Coil 38kHz Coil 38kHz Filter 38kHz Filter T75 018 A T75 18 A T75 019 A T75 015 0 T75 015 0 POTENTIOMETER Symbol Description Part No R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R l 3 R14 815 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 Carbon Carbon Carbon Carbon Carbon Carbon Carbon Carbon Carbon Carbon Carbon Carbon Carbon...

Page 20: ... R47M FsOV ccDSLl 00K50 ccDsLl 00K50 CEMX 1 OOM F3V CEMX l OOMF3V CEMX2R2MF35V CEMX2R2MF35V coMA302M50 COMA3O2M50 coMA103M50 coMA103M50 coMA103M50 coMAr03M50 coMA104M50 coMA104M50 CEMX47MF35V CEMX47MF35V Symbol Description Part No R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon fil...

Page 21: ...2K 22K 4 7K 4 7K 470 470 150 150 82K 82K PUSH SWTTCH UNrT A W15 086 CAPACITORS Y Symbol Description Part No VRl vR2 100kSl dual TREBLE Control 100kfl dual BASS Control c82 O4G0 c82 O40 0 Symbol Description Part No C1 c2 C3 c4 c5 c6 c7 c8 c9 clo c11 c12 c13 c14 c15 c16 c17 c18 c19 c20 c21 c22 c23 c24 E lectrolytic E lectrolytic E lectro lytic E lectrolytic E lectrolytic E lectrolytic E lectrolytic ...

Page 22: ...coMAl 03K50 CSYAR47MF25V RESISTORS Symbol Description Part No R26 Carbon film 22OK RF PS22OK K SWITCHES Symbol Description Part No S6 S7 S8 High Cut Filter Switch Push type AFC Switch Push type Mutinq Switch Push tyPe s31 022 O s31 022 0 s31 022 0 Symbol Description Part No c1 c2 c3 c4 c5 c6 c7 c8 Ceramic Ceramic Ceramic E lectro lytic E lectrolytic E lectro lytic E lectro lytic Ceramic 0 01 0 01 ...

Page 23: ...PIONEER PRINTED CIRCUIT BOARD ...

Page 24: ...P I o rK p dh eJ e__lw a7l3s HM_ 6_u p I S s k loP t t to u t asls Ffe r St lpd if l 8r m J l i MA e W e A v F W t S 470 22oK I S zzoK R62zK oo l oo oo oo ood a6 oo oo oo GND 6 INr GID OUTr B OUTz I I GIID z I A orr o lwrs ts l our A Lq o C5 2Z0l25 6 C6 cN 220125 1ooooo ooooo D g e i _l o__1 r o L 1 3 sw r n2 l e I d l l l t o lol o ll o I I R5 Ir l 0 01 I O rr v1 lol Dz 6 27 N El 1 tr c2 sr Yo N ...

Page 25: ...trtrRPORATION 15 5 4 Chome Ohmori nishi 0hta ku Tokyo Japan PIONEER ELECTRONIcS U S A coRPoRATtoN I eroxeen ELEcTRoNtc EURopE AG 140 Smith St Farmjngdate L t N y 11735 U S A I 59 Forcfr Strasse 8032 Zurich Switzertand Y Printed in Japan n t z oor o 69HO2Y0rN ...

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