Pioneer SX-3400 User's Manual
Contents
1. 400H2 30 MOD Position of Adjustment St Erequoney re tuning diat point Adjustment method oe m 10008 2 oo 3 emos BOW TC T3 maximum dition of 2048 the SIGNAL mater ETT mum wowm rs Rear panel ED Tuner AF assembly Ds m N 13 Garsntenns HE RSE f 5 Fig 8 2 AM tuner adjustment 11 83 FM TUNER Connect the FM SG FM signal generator to the FM antenna 3002 terminal Switch the FUNCTION selector to the FM position the MODE FM MUTE switch to the OFF MONO position The tuning coils in the FM front end does not have an adjusting core Consequently tracking adjust ments at 90MHz are performed by regulating the gap between rotor and stator of the tuning capacitors The expression adjust VC found in the text means that the two outer rotor blades of each of these tuning capacitors are to be extended outwards with spatula Part No GGK 066 as shown in Fig 8 3 FM SG oon 75kHE DEV Position of Se p tuning dial Adjustment point Adjustment method rooms Obtain maximum deflection of ihe SIGNAL meter 2 somme va 3 100844 TCI Tc2 EE I a gom ver vc2 5 Repent s2. I 1 I 10 2 P C BOARD CONNECTION DIAGRAM TUNER AF AMP Ass y 163 LED Assy GWX 495 A I 2 EN 3 10 3 PARTS LIST NOTE When ordering resistors first convert resistance values into code formas shown in the Following examples Ex 1 When there are 2 effective digits any digit apart from 0 such as 560 ohm and 47k ohm tolerance is shown by 5 and 107 5600 56x 10 361 ROWS 47 10 473 RDGPS AIS J 085 RNIHORSK RSIPO YO K Ex 9 When there are 3 effective digits such as in high precision metal film resis tors 562kn 562x10 8621 RNUSR 562 mark found on some component parts indicates the importance of the safety factor of the part Therefore when replacing be sure 0 use parts of identical designation Miscellaneous Parts Tuner AF Amplifier Assembly GWM 163 P C BOARD ASSEMBLIES SWITCHES t No Symbol amp Description Part No Symbol amp Description ammass Tuner AF amplifier 223 s Slide rotary switch GWX A95 LED assembly FUNCTION Hendphones assembly Push switch TAPE ASG242 52 Push switch MODE FM MUTE LOUDNESS Part No Symbol amp Description TRANSFORMERS FILTERS AND COILS a Capacitor Part No Symbol amp Description a FM matching transformer FUSES 04
3. 7 05 HATIBSW R 06 25A7265 a7 08 010 28A798 013 014 25017754 018 018 280948 078 020 234720 021 022 2 023 024 025 026 280313P 027 028 280880 029 280313 2SATIDA GP 200 01 04 140 06 KzL130 182473 D7 D9 D11 014 016 181555 08 013 mz o81 012 OTHERS Patnos Symbol amp Description 16 Terminal ANTENNA 048 Terminal SPEAKERS 063 Terminal INPUT TAPE AEC240 Insulator spacer VBZ3OPOGOFMC BBTSOPOBOFZK Soraw 230 40 Soraw 2 Screw
4. Service Manual STEREO RECEIVER X 3400 NH PIONEER MODEL SX 3400 COMES IN THREE VERSIONS DISTINGUISHED AS FOLLOWS Voltage Remarks 120V 5 110V 120V 220V ard 240V seitens Genera ex d This service manual is applicable to the KU type When service manual page 25 32 type please see the additional CONTENTS 1 SPECIFICATIONS 9 EXPLODED VIEWS ses M 2 FRONT PANEL FACILITIES 4 10 SCHEMATIC DIAGRAM P C BOARD 3 DISASSEMBLY 8 CONNECTION DIAGRAM AND PARTS LIST 4 PARTS LOCATION 6 10 1 Schematic Diagram 17 5 BLOCK DIAGRAM 8 102 Board Connection Diagram NE CIRCUIT DESCRIPTIONS 8 103 Parts List ves T 7 DIAL CORD STRINGING saves 10 PACKING Des 8 ADJUSTMENTS ADDITIONAL SERVICE MANUAL FOR S 25 8 1 Idle Current Adjustment 82 AMTuner 83 FM Tuner 12 1 SPECIFICATIONS Amplifier Section Continuous power output of 15 watts channel min at 8ohms from 20Hertz to 20 000 Hertz with no more than 0 08 total harmonic distortion Total Harmonie Distortion 20 Hertz to 20 000 Hertz ohms from AUX continuous rated power output No more than 0 08 7 5 watts por channel power output No more than 0 08 1 watt per channel power output No more than 0 08 Intermodulation Distortion 50 Hertz
5. tortion and cost the power stage does require a higher gain and a higher degree of stability In the SX 3400 this high gain and high stability are achieved by a current mirror load differential amplifier in the first stage and by the use of a constant current circuit for the load of the pre driver stage The power amplifier stage is a complementary 2stage Darlington connection resulting in an output power rating of 15W 10W 80 20Hz 20 harmonie distortion of less than 0 08 20Hz 20kH at rated output Certainly a superb performance for an amplifier of this class is obtained 7 DIAL CORD STRINGING 1 Remove the dial pulley assembly from the jaft of the tuning capacitor by undoing screw 2 Tie one end of the cord to the stud located inside the dial pulley assembly 3 Rotate the tuning capacitor right around until the rotor blades are fully intermeshed 4 Secure the dial pulley assembly back onto the shaft of the tuning capacitor making sure that the securing screws faces directly upward 5 Pass the cord out through the small opening in the circumference of the dial pulley assembly and then take it over pulleys and in that sequence Dial pointer 10 6 Wind the cord around the dial shaft 3 times 7 Pass it over pulley D wind it around the dial pulley assembly 2 times and finally tie it to the spring hook so that it is tensioned 8 Tum the dial shaft and check that t
6. Push knob A 12 ABNO2 Washer faced nut ANB 908 Front panel assembly 13 VBZ3OPIDOFZK Screw AAB 214 Knob 14 VIZADPIGOFMC Sera Tuning knob 15 Foot Top plate AAD 297 Push knob Bottom plate AMs 042 Side board R DCZADPSOFZK Interior Components SX 3400 Parts List Kay No _ Part No Description m Pulley assembly 2 Side frame L 3 ATT687 Power transformer A Lomp wedge type 8 ANGE Meter holder 8 Signal meter 7 ANG 298 Motor holder A 0 ASST Push switch 9 Capacitor 10 Hesphonns 11 AEC Smal ploy 12 ANG 297 Pulley holder 13 From Tapping screw 15 Mount piate 37 Nur AEL140 Lomp with wires 20 Dia pointer assembly n Smother 22 deesing late L 21 Dial panel E Dia dressing plate R Fun 2A 28 AEK 100 Fue 4A 27 039 AG socket 28 Wire holder 29 Shield plato TunerlAF amplifier assembly owx a0 LED osenbly AKA240 Dial shalt assembly Contor rame Polly Side trame 35 axana Diol pully assembly Par pane 20 arcas Stain veiet A06023 Power cort 40 chip an or ground Sere ARCAM River VTZAUPOMFMC Serew 25 BBTIOPOOFZK 46 MTZSOPIOOFZK 47 WASSF1OONOBO Washer AECAM Rivet as
7. 2503132 280880 280313 283733 KZL 140 KzLA30 152473 181855 R136 R140 R149 8150 R153 RISA 8131 9134 1141 8145 R125 R126 A146 R123 R124 R129 120 R135 Symbol amp Description o 02 04 03 09 011 os Q10 an 013 014 015 018 019 020 021 022 023 024 025 026 027 028 029 01 04 05 o6 07 D9 D11 014 016 013 012 OTHERS Part No Symbol amp Deseriotion 16 Terminal ANTENNA AKE 048 Termina SPEAKERS 063 Terminal INPUT TAPE 208 Insulator spacer VBZAOPOGOFMC Screw BBT3OPOBOFZK Serew PMZIOPDAOFMO Serew 2 Serew 11 Parts List Key No Part No Description 1 Side pad 2 777 Packing cose 3 ARB IGS Operating instructions 4 FM antenna 2a LED Assembly GWX 495 Part No Symbol amp Description AEL324 017 018 Headphones Assembly GWX 496 Part No Symbol amp Description AKN029 Headphones jack 1805253313 R147 R148 ADDITIONAL Service x 3400 The basic performance of the 8 3400 8 type is the same as the SX 3400 KU type This additional service manual is applicable to the S type please refer to the KU type service manual page 2 page 24 with exception of this supplement 1 SPECIFICATIONS The specifications for 8 type is the same as the KU type except f
8. 10M BOL CEA 2R2M 50L 100M 50L CEA 220M 25L CEA 330M 16L CEA 470M 10L CEA 470M 25L CEA 101M 261 CEA 221M 16L CEA 221M 35L CEA 331M 10L CEA 331M 16L CEA 471M bL CEANL R33M 50 CEANL RATM 50 CEANL 010 50 CEANL 2R2M 50 CEANL IRIM 50 CEANL 100M 16 500 A ACH217 ACG O04 CEA 101M 35L Note RESISTORS Part No ACTA28 ACT 023 AcTA28 ACPO79 ACN 118 RDUPM ANKPO ROWS COD J ARDYPSF 2004 OOO J 00 Symbol amp Daseription 109 0112 C67 con cat c99 C100 Cn cns c94 E c29 612 060 C71 C16 C23 026 052 C21 c54 Ci9 101 102 cas C27 C108 C106 ca C115 0118 C103 C104 E can 632 073 122 0123 0128 0126 When ordering resistors convert the resistance value into code form and then rewrite the part no as before Symbol amp Description vm Variable resistor VOLUME Variable resistor BALANCE VRS VR Variable resistor BASS TREBLE vas Semiixed resistor R127 A128 Cement coated RI R26 128 43 22 R136 A140 R183 RISA Ru 131 8134 141 8145 R125 R128 R46 R123 R124 A129 R130 R135 a SEMICONDUCTORS Part No Symbol Description askies a 250535 02 04 250461 03 09 011
9. 2 FUNCTION SELECTOR Use this selector to select the program source AM Ser here when receiving an AM broadcast FM Serhere when receiving an FM broadcast PHONO Set here when playing records on a turn table connected to the PHONO jacks AUX Sel here when listening to a program source which is connected to the AUX jacks 3 DISASSEMBLY Side Board L and R Remove the four screws Top Plate Remove the three screws Top plate Tuning knob sx 3400 TAPE MONITOR SWITCH Depress the switch with a tape deck which is con nected to the TAPE jack REC and PLAY when you want to monitor the playback or recording of a tape NOTE Release this switch when listening to records or a broad casting TUNING KNOB This knob is used for selection station When selecting station observe the signal meter Front Panel Assembly 1 Pull off the all control knobs 2 Remove the two screws Bottom Plate Remove the eight screws Side board R Bottom plate 3 Foot NOTE The mark found on some component parts indicates the importance of the safety factor of the part There 4 PARTS LOCATION Front Panel View fore when replacing be sure to use parts of identical designation Front panel assembly Ton plate ANE SOT Signal meter RAW TE Sida board L Side board AMS 42 Push knob A POWER NER ind ning AAA061 Knob BASS TR
10. 4 FM detoctor transformer a 622 Bar antenna assembly Sarnen Bereit Dario ATO 066 OSC aR FH FLF2 PM ceramic filter prada ATE 084 ceramic ler 124028 18 RF choke coil LAMPS No Symbol Description __ CAPACITORS PLY Plot amp with wires Parto Pir Lam fond ER SWITCH 0900 so PartNo 000000 Symbol Dese ELT CCOSL 0106 50 0800 50 mom ss switch POWER 1000 50 OTHERS echo tenes Part No Symbol 8 1501 50 1803 50 Somi mer Const 150860 atten n Power tranatormar 3301 50 axe on A ADG 023 Power cord 8888 2 Variable capacitor Ceramic trimmer Part No Symbol amp Description 4701 50 CCDSL 6804 50 CCDSL 101150 06051 151J 50 CCDSL 221450 182K 222K 50 472K 50 CKDYA 822750 CKDYF 1032 50 2232 50 CKDYX 273M 25 CKDYF 4732 50 CCDSL 5814 50 CODSL 220K 500 101K 600 COMA 2424 50 COMA 183K 50 COMA 273K 50 COMA 473K 50 COMA 104K 50 CASH 3311 60 COSH 6111 50 CEA 50L CEA SOL CEA 22M BOL CEA 100M 50L CEA 220M 26 CEA 330M 16L CEA 470M 10L CEA 470M 261 CEA 101M 25L 221M 16L 221M 351 CEA 331M 10L CEA 16L 471M CEANL 50 CEANL 50 CEA
11. 7 000 Hertz 4 1 ohms from AUX continuous rated power output No more than 0 08 7 5 watts por channel power output more than 0 08 1 watt per channel power output more than 0 08 Damping Factor 20 Hertz to 20 000 Hertz ohms 30 Input Sensitivity Impedance PHONO 2 5mV 50 kilohms AUX TAPE PLAY 150mV 50 kilohms Phono Overload Level T H D 0 1 1 000Hz PHONO 1 Output Level Impedance TAPE REC Speaker Frequency Response PHONO RIAA Equalization ee to 18 000Hz 2198 AUX TAPE PLAY 150mV 2 2 kilohms 168 mo 20Hz to 80 000Hz 1308 Tone Control BASS 77 100Hz TREBLE 898 10kHz Loudness Contour Volume control set 4088 posi tion 10047 Hum and Noise IHF short circuited A network PHONO EEE AUX TAPE PLAY 22222222 984B FM Tuner Section Usable Sensitivity IHF 12 14B1 12 24 5048 Quieting Sensitivity MONO eene es TE RABE 39 2481 504V SX 3400 Signal to Noise Ratio at 854811 MONO TE STEREO Gives dr ne goza Distortion at 65081 2 1KH2 0 5 STEREO 2 TkH2 0 3 Capture Ratio E 2 898 Alternate channel Selectivity 400 OUND Stereo Separation 30Hz to 16 2 Frequency Response Spurious Response Ratio Image Response Rat
12. EBLE BALANCE Push knob TAPE MONITOR AND AAD 281 Push rob MODEIFM MUTE LOUDNESS Knob VOLUME FUNCTION AAD 201 n Front View with Front Panel Removed LED WX 498 A Push sich POWER 4 ASG 511 i Dial shaft assembly 200 E em switch TAPE MONITOR Variable resistor BASS TREBLE ACT 129 ASG 247 Variable resistor BALANCE Side rotary switch FUNCTION ACT023 36 00 Push switch IMODE FM MUTE LOUDNESS variable resistor VOLUME 56 242 ACTA78 Sx 3400 Top View with Top Plate Removed Fuse 4a AER Fuse 12A AEK 103 A Power transformer Tuner AF amplifier assembly GWM 163 Rear Panel View socket Strain Tove AKB 063 a ANTENNA A Powar cord 5 BLOCK DIAGRAM 6 CIRCUIT DESCRIPTIONS Tuner The AM tuner stage employs a 2 ganged tuning capacitor a single element ceramic filter an NPN transistor RF amplifier a PNP transistor mixer converter and an NPN transistor IF amplifier FM Tuner The FM front end is comprised of a J PET 28 168 single stage RF amplifier an NPN tran sistor mixer and an NPN transistor modified Clapp
13. NL 010M 50 CEANL 2R2M 50 CEANL 3R3M 50 CEANL 100M 16 Ra7k 500 Ancnz z A ACG 004 CEA 101M 35L C25 cob coo C64 3 37 C95 C96 89 070 C2 C9 C12 C14 C24 C50 75 076 C30 C15 C17 C20 C29 C56 C59 C113 037 c38 C107 c108 087 C91 C92 C100 cnn ene cst C42 C71 C72 C16 C23 C26 052 car C21 C54 C101 C102 cas 065 C66 C27 106 C115 C104 C124 ca cn C32 CBS C86 ca C122 0123 C125 C126 cia SX 3400 Note When ordering resistors convert the resistance value into code form and RESISTORS then rewrite the part no as before Part No Symbol amp Description ACT 128 vm Variable resistor VOLUME ACT 023 vn2 Variable resistor BALANCE ACT 129 VR3 VRA Variablo resistor BASS TREBLE AcP o79 vns Semi ixed resistor ACN 118 R127 R128 Cement coated ACN029 RISI R1 R26 R28 R43 R45 R122 AN PO 0000 J RDAPS OOS J ARDXPSF 000 J ARD PME ccr 2 SEMICONDUCTORS 25 250535 250481 7 HATISGWP 2547265 254798 25 1775 2SCO45A 28A720 28 1318 288507
14. Piate S0 2 3 1 I 20 28 10 SCHEMATIC DIAGRAM P C BOARD CONNECTION DIAGR 10 1 SCHEMATIC DIAGRAM 3 E I xx T P C BOARD CONNECTION DIAGRAM AND PARTS LIST TUNERZAE bey SX 3400 I 9 wir H a e a aj ee SWITCHED UNSWITCHED 2008 200W 23222 External Appearance of Transistors and ICs 28 720 250313P 2501318 yi a hee eet asar za ENS Lot Nor im 280461 mere 10 E S s i Ts eee 1457 5 OMA E Allee
15. he cord moves smoothly Cut off any excess cord 9 Tum the dial shaft counter clockwise as far as it will go 10 Align the dial pointer with the starting point of the dial scale and then pass the cord over it 11 Check that the dial pointer is in line with the starting point of the dial scale 12 Finally apply the locking paint to the cord securing positions stud and spring hook and the dial pointer connection Dressing plate R Spring hook Dial pulley assembly 8 ADJUSTMENTS 8 1 IDLE CURRENT ADJUSTMENT 1 Connect an 80 resistor to the speaker output terminals 2 to VOLUME control down to minimum evel turn the power on and wait about 10 minutes 3 Connect a DC voltmeter to the TP terminals of the Tuner AF assembly 1 and TP2 for L ch and and for R ch 4 Check that the voltage between TP1 and TP2 and and lies within the DC 2mV 250mV range If the voltage is less than 2mV cut jumper wire A for L ch and jumper wire B for R ch the voltage exceeds 250mV check for circuit failure 8 2 AM TUNER gut Jumper wire A MR Jumper wire B Tuner AF assembly Fin 8 1 Idle current adjustment Connect the AM SG AM signal generator Lo the AM ANTENNA terminal via 160 resistor Set the FUNCTION selector to the AM position
16. ht When selecting the desired station find the position of the tuning knob which effects the maximum deflection of the meter pointer DIAL POINTER This pointer indicates the broadcasting stat FM STEREO INDICATOR This indicator lights up when the tuner is receiving a stereo program 5 TAPE MONITOR INDICATOR When the tape monitor switch is set to ON this indicator fights up This lamp indicates the receiver is monitoring or playing back the tape on the tape deck connected to the TAPE jacks 8 HEADPHONE JACK Plug the headphones into this jack when you want to listen through your stereo headphones NOTE When the haxdphone plug is connected to this jack the sound will no loger be heard through the speakers D BASS AND TREBLE CONTROLS Use these controls to adjust the bass and the treble If You turn the bass control to the right from its center Position you will be able to emphasize the sound in the low frequency range Conversely turning this control left from the center position you will attenu ate the sound in the low frequency range You can use the treble control to adjust the sound in the high frequency range BALANCE CONTROL Use this control to balance the volume of the left and right channels If the sound appears to be louder the right it means that the volume of the right channel is higher Turn the balance control to the lett and adjust Conversely if the sound appears to be louder on
17. io IF Response 900 Suppression Ratio 504 Subcarrier Product Ratio 2 3008 SCA Rejection Ratio 6098 Muting Threshold 26B 9 74V Antenna inputs 300 ohms balanced 75 ohms unbalanced Tuner Section Sensitivity IHF ferrite antenna 270 IHF ext antennal 1WV Selectivity 274 Signal to Noise Ratlo 5248 Image Response Ratio 1 3208 IF Response Ratio wl 404 Antenna loopiitck antenna Miscellaneous Power Requirement Power Consumption Dimensions AC 120V 60Hz UY 22 BOW UL 2 44AIN 128 H 20210 mm 17 1720 54 1604 11 1 2 0 in Weight without package 5 5kg 12 10202 Furnished Parts Operating instructions SEER T type antenna A Measured pursuant to the Federal Trade Commission s Trade Regulation rule on Power OUtpur Claims for Ampli wore Specifications and the design subject possible modifica tions without notice due to improvements 2 FRONT PANEL FACILITIES Walnut grained vinyl metal top and walnut grained vinyl side panels are used in the construction of this cabinet POWER SWITCH Depress this switch to supply power to the receiver SIGNAL METER This meter indicates the antenna input level of the broadeasting wave The higher the input level the more the meter deflects toward rig
18. iption ASE 009 si Slide rotary switch FUNCTION ASG 247 E Push switch TAPE ASG 242 82 Push switch MODE FM MUTE LOUDNESS TRANSFORMERS FILTERS AND COILS Part No ATE 039 022 ATO 066 ATF 084 124 028 CAPACITORS Part No Ack 012 006 ccous 0900 CCDSL 030 50 CGDPH 0800 50 0800 50 CCDS 1000 50 060 1504 50 150 50 CCDAH 1804 50 CCDSL 1501 60 330 50 4701 60 GCDSL 6801 1014 60 CCDSL 1611 60 2211 50 CKDYB 182K 50 222K 60 472K 50 CKDYA 8221 50 1032 50 CKDVF 2232 50 243K 50 4732 50 CCDSL 5614 50 081 220K 500 Symbol amp Description FM matching transformer FM detector transformer Bar antenna assembly OSC coil FM ceramic fil Fa ceramic L6 RF choke coll Symbol amp Doseription ver Variable capacitor Ceramic trimmar e c22 ch en C25 064 C79 C2 CB C12 C14 C18 C24 CAB C50 C55 c58 C75 C6 C30 C34 C17 C20 C28 CB6 C89 C113 C37 C107 C108 Part No CCOSL 101K 500 242150 183K 50 COMA 273K 50 COMA 473K 50 COMA 104K 60 CASH 1314 60 5114 50 CEA SOL CEA 0
19. or following sections Miscellaneous Power requirements 120V 220V and 240V switchable 50 60Hz 2 CONTRAST OF MISCELLANEOUS PARTS NOTES Parts without part number cannot be supplied The A mark found on somo component parts indicates the importance of the BOARD ASSEMBLIES safety factor of the part Therefore when replacing be sure to use parts of identical designation GWX 496 OTHERS e ake E Power transtormer u der onas 2 22 power As Line voltage selector u AKX 063 Switchable 4 positions Pit ump with wie rem Poiret ADG O46 EN Strain relief AEC358 337 Operating 3 SCHEMATIC DIAGRAM SX 3400 S 3 1 2 4 P C BOARD DIAGRAM Tuner AF Amplifier Assembly GWM 171 5 PARTS LIST Tuner AF Amplifier Assembly GWM 171 SWITCHES Part No Symbol amp Descr
20. teps 3 to 4 as above seas o Reduce distortion the output REC terminal to minimum 1 Multiplex Decoder Connect the MPX SG FM multiplex generator to the FM SG external modulator terminal Set the FM SG output to 98MHz and 66dB modulation mode to external and tune the SX 3400 to this position Sot the MODE FM MUTE switch to the ON STEREO position disen pi pomem No signal lunmodulated vas Obtain o 19KHE signal at terminal No 9 n Muin 1kHz 67 SkHz DEV Reduce dis 2 by up to 90 in Pilot 7 5kHe DEV tier leen minimum tion in the output TAPE REC 10 Stator wT Rotor blade AUN 0 Fig 83 Tuning capacitor adjustment Stator Rotor blade 12 sx 3400 ver B 2 77 Tuner AF assembly Fig 8 4 tuner adjustment 13 9 EXPLODED VIEWS Exterior Components Parts List OTES Paris without part number cannot be supplied The A mark found on some component ports indicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation Part No Description Koy No PartNo Deseription Side board L 11 Screw 00
21. the left it means that the volume of the left channel is higher Therefore turn the balance control to the right and adjust MODE FM MUTING SWITCH This switch is a combination of the FM muting switch and the mode selector switch When the switch is left undepressed STEREO ON the reproduction in stereo mode while the FM muting function acts to suppress unpleasant interstation noise while listening to FM broadcasting When the switch is depressed MONO OFF position however reproduction is in mono mode while the FM muting function does not act thus enabling suit able reception of weak radio stations when tuning in to the FM broadcasting station NOTE Recording stereophonically with the mode EM muting ch in the MONO OFF position may cause deterioration in channel separation 40 LOUDNESS SWITCH When listening to a performance with the volume control turned down depress this switch and the bass will be accentuated When the volume is low the human ear finds it harder to hear the bass than when the volume is high The loudness switch is thus designed to compensate for this deficiency By depressing this switch the bass through much more strongly and the sound takes on punch even when the volume control is turned down VOLUME CONTROL Use this control to adjust the output level to the speakers ond headphones Turn it clockwise to increase the output level No sound will be heard if you set it to 1
22. type local oscillator The IF stage consists of 2 dual element ceramic filters selector elements and an IF system which incorporates the IF limiter amplifier FM detector meter drive circuit and an FM muting circuit The stereo detector stage employs an PM stereo demodulator HA1156W P while the pilot signal leak 19kHz and sub carrier signal frequencies above 23kHz are removed by an 18dB oct active filter consisting of PNP tran sistor This active filter also serves as an amplifier for frequencies within its passband and eliminates crosstalk Equalizer Amplifier This circuit is an NFB type equalizer amplifier with one high performance TC NIM4558DX in both L and R channels This IC is a low noise type and provide an open loop gain of 704 The main performance specifi cations for this circuit include a voltage gain of 35 50B at 1kHz a phono dynamic margin or overload level of 140mV at 1kHz THD 0 1 and equalization within 14 30Hz 1 kHlz SX 3400 Power Amplifier This all stage direct coupled pure complemen tary SEPP circuit features a current mirror load differential amplifier in the first stage and in corporates the tone control circuits in the NFB loop Although the incorporation of the tone control circuits in the power amplifier stage reduces the number of elements that the signal has to past through and thereby further reduces noise dis
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