Home

PIONEEFI

1. DIODES AND TRANSISTORS Symbol Description Part No 23 HEAD UNIT W15 049 CAPACITORS Symbol Description Part No i Electrolytic 10 10V C2 Electrolytic 10 10V Ceramic 100P 50V C4 Ceramic 100P 50V C5 Electrolytic 100 6V C6 Electrolytic 100 6V C7 Mylar 0 01 50V Ca Mylar 0 01 50V C9 Mylar 0 003 50V Cio Mylar 0 003 50V Cu Ceramic 330P 50V Ci2 Ceramic 330P 50V Electrolytic 10 15V C14 Electrolytic 10 15V Ci5 Electrolytic 10 15V C16 Electrolytic 10 15V Ciz Electrolytic 50 25V RESISTORS Symbol Description Part No Ri Carbon film 3 3K R2 Carbon film 3 3K R3 Carbon film 470K R4 Carbon film 470K R5 Carbon film 1M R6 Carbon film 1M R7 Carbon film 330K R8 Carbon film 330K R9 Carbon film 470K Rio Carbon film 470K Ru Carbon film 470 Riz Carbon film 470 Ri3 Carbon film 56K R14 Carbon film 56K R15 Carbon film 4 7K Rl6 Carbon film 4 7K Riz Carbon film 3 3K Ris Carbon film 3 3K Rig Carbon film 270K R20 Carbon film 270K Rai Carbon film 22K R22 Carbon film 22K R23 Carbon film 2 2K R24 Carbon film 2 2K R25 Carbon film 10K R26 Carbon film 10K R27 Carbon film 47K R28 Carbon film 47K TRANSISTORS Symbol Description Part No Qi 2SC458LG CorB Transisto Q2 2SC458LG CorB Transistor 2SC458LG CorB Transistor Qa 2SC458LG CorB Transistor Qs 28045816 CorB Transistor Qe 2SC458LG CorB Transistor R2 33K Rio 470K GU
2. CONTROL AMP UNIT Wi5 079 250458 250458 20010 O 290458 250458 dem ict Doros oim Dg 250458 IN E 800716 QUT gs ina FM FRONT END PUSH CONTROL UNIT SWITCH W15 080 UNIT W15 081 MUTING TAPE MONITOR POWER amp SPEAKER SELECTOR Wr TREBLE BASS m SELECTOR TUNING VOLUME BALANCE 17 PARTS LIST IN uF 10 TOLERANCE UNLESS OTHERWISE NOTED Piper Symbol Description Part No i Ceramic 3P 0 5 50V C2 Electrolytic 220 3V C3 Mylar 0 0015 50V C4 Electrolytic 2200 80V C52 071 0 C5 Ceramic 0 01 20 DC1 4KV C43 003 0 0 01 ED DC1 4KV C43 003 0 C7 Ceramic 0 01 SENA DC1 4KV C43 003 0 C8 Mylar 0 001 50V C9 Mylar 0 001 50V c64 030 0 w RESISTORS IN OHM 10 TOLERANCE 4W NOTED K KQ M MQ UNLESS OTHERWISE Symbol Description Part No Ri Carbon film 150K Carbon film 150K Rs Carbon film 100K Ra Carbon film 100K R5 Carbon film 1M R6 Carbon film 1M R7 Carbon film 68K Rs Carbon film 68K R9 Carbon film 470 Rio Carbon film 470 Rll Carbon film 150 3W 12 Carbon film 150 3W Ris Carbon film 6 8K R14 Carbon film 6 8K R15 Carbon film 1M R16 Carbon film 470 Riz Carbon film 68K Ri8 Carbon film 68K M W52 004 0 COILS AND TRANSFORMERS Symbol Description Part No Power Transformer T52 158 0 Matching Transform
3. MUTING OFF Volume Control Setting Fully Counterclockwise Input Alignment Output Equipment Equipment Connections Frequency Connections Adjust Remarks T of IF Unit Adjust for maximum Sweep Generator T2 sensitivity and symme IN terminal Oscilloscope T3 trical characteristics of IF unit 10 7MHz STE terminal Check symmetry of curve Remove electrolytic capacitor of FM IF Unit 4 74F in detector circuit Adjust the primary core of T4 so that slope of straight portion of S Sweep Generator curve will become the IN terminal 10 7MHz steepest and adjust the of IF unit secondary core so that the center of S curve will concide with the center of the marker Connect OUTPUT terminal of fronted to IN terminal of IF unit Adjust for maximum sensitivity and symme trical characteristics 40dB P Oscilloscope T2 of Sweep Generator Point of frontend TP of Front 10 71MHz no inter terminal end 80dB ference as Check symmetry of curve near as 40dB 88MHz Oscilloscope Ta of Adjust similarly to OUT terminal IF Unit STEP 4 Connect electrolytic capacitor C12 4 7LF Ls of Signal Generator 90MHz 20dB 90MHz Oscilloscope frontend Adjust for FM Antenna 400Hz V T V M maximum deflection terminal 106MHz 30 106MHz OUT terminal CT4 of a frontend lie Repeat STEPS 10 and 11 several times Li T1 90MHz T3 of Signal Ge
4. PIONEER SOLID STATE AM FM STEREO RECEIVER Model Sx 3S90 CAUTION Before connecting the line cord to the wall socket carefully read and follow the instructions described below to assure the safety of your unit This receiver is set for 240V operation when shipped If this unit is used in a different line voltage area read and follow LINE VOLTAGE SELECTION AND FUSE on page 1 Be sure that the line voltage setting on your unit agrees with the line voltage in your area and that the fuse installed in your unit is a proper one INSTALLATION OPERATING AND SERVICE MANUAL Including PARTS LIST CIRCUIT DIAGRAMS TROUBLE SHOOTING AND MOUNTING TEMPLATE PIONEER ELECTRONIC CORPORATION __ PIONEER sss FEATURES HIGH PERFORMANCE FM TUNER An FET field effect transistor is used in the radio frequency amplifier to attain a high sensitivity and selectivity Further four ICs integrated circuits are used for the intermediate frequency amplifier to eliminate interference and noise BUILT IN EXCELLENT FM MPX CIRCUIT This switching circuit having excellent separation and frequency response is built in for reproduction of reality music BUILT IN HIGHLY SENSITIVE FERRITE ANTENNA FOR AM RADIO RECEPTION The ferrite antenna provides high sensitivity reception of AM broadcast programs e SPECIAL CIRCUITRY FOR VERSATILITY w The high output given by strictly selected transistors two sets of loudspeaker
5. 5 Rae 10K R28 47K zino O oo OND 50 25 OO no R27 47K G T W R2s 10K oo Ri3 56K G w 9 Cu Hho 330P Ro 470K R 3 3K 01 01 69252 Us 51857252 10 15 amp 22 22 Cio R24 22K 0 003 Hoco 0 01 R23 2 2K 0 003 R21 22K Ris 270K Fe Cr 10 15 dt a D Ris amp TK 405 9 0 100 6 R7 330K GS Wy Ru 470 nh o NW e BS w 0 IM R3 470K 01857252 Ay 91857252 01 01 CONTROL UNIT W15 079 CAPACITORS Symbol Description Part No Cl Electrolytic 0 47 25V C2 Electrolytic 0 47 25V C3 Ceramic 10P 50V C4 Ceramic 10P 50V C5 Electrolytic 0 22 25 C6 Electrolytic 0 22 25V C7 Electrolytic 100 35 Electrolytic 100 35V Co Electrolytic 1 16 Cio Electrolytic 1 16V Cu Mylar 0 0047 50V C12 Mylar 0 0047 50V Cis Mylar 0 0047 50V Cia Mylar 0 0047 50V C15 Electrolytic 33 6 3 Cis Electrolytic 33 6 3V Ci7 Electrolytic 50 25V Cis Electrolytic 50 25 24 Low Noise Description Carbon film LN Carbon film LN Carbon film LN Carbon film LN Carbon film LN Carbon film LN Carbon film LN Carbon film LN Carbon film LN Carbon film LN Carbon film LN Carbon film LN Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film LN Carbon film LN Carbon film Carbon film Carbon film
6. R3 Carbon film 330 Ra Carbon film 10k Rs Carbon film 1 8k Re Carbon film 10k R7 Carbon film 68k Rs Carbon film 39k Rg Carbon film 4 7k Gr Ri Carbon film 2 7k Ry Carbon film 22k TRANSISTORS symbol Description Part No Q 2CS870 Q2 2CS870 0 28870 22 2SC461 A Transistor 2SC460 A Transistor 2SC460 A Transistor 2SC460 A Transistor 2SC460 A Transistor AM TUNER UNIT W14 008 CAPACITORS Description Part No Ceramic Ceramic Ceramic Ceramic Ceramic Mylar Styrol Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Ceramic Mylar Mylar 1N60 Diode 1N60 Diode 1N60 Diode 1N60 Diode RESISTORS Description Part No Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film ele P wio Tt Ris 47K Cu 004 Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film 1K Carbon film Carbon film 27K Carbon film 22K Carbon film 470 Carbon film 470 Carbon film 1K Carbon film 100 Carbon film 3 3K Carbon film 6 8K Carbon film 220K COILS AND TRANSFORMERS Description Part No MW RF Coil T41 008 MW OSC Coil T43 007 1 C12 0 04 10 16 AM IF Transformer T71 025 1 AM IF Transformer T71 025 0 AM IF Transformer T72 017
7. When tuning the receiver to an FM broadcasting station adjust the TUNING knob so the pointer of the lower meter deflects largely rightward and in addition the pointer of the upper meter is at the center Tuning to AM Radio Station Tuning to FM Radio Station RFF TUNING Pointer at center EL cms eere Fig 6 3 FM STEREO INDICATOR This lamp is lit during reception of an FM stereo program 4 TUNING KNOB The knob for tuning the receiver to an AM or FM broadcasting station Adjust the knob for the best tuning while observing the tuning meters 2 5 SELECTOR SWITCH The switch for selecting the program source eH For reception of an AM program FM For reception of an FM monaural program FM AUTO For automatically selective reception of stereo or monaural FM program For playing a disk record by using the turntable connected to the PHONO 1 terminals 17 PHONO 2 MIC For playing a disk record by using the turntable connected to the PHONO 2 terminals 18 or for using a micro phone by inserting its cord plug into the MIC jack 16 When the micro phone is connected to the jack the turntable connected to the PHONO 2 terminals cannot be used PHONO Es AUX HM For using the cartridge tape player reproducing the TV audio output or operating other equipment connected to the AUX terminals 20 When the SELECTOR switch is operated the program indicator
8. it is often judged that the unit is faulty but statistical records indicate that the majority of noises produced in hi fi acoustic units result from external sources of noise Due to the inherent high sensitivity and the high fidelity in reproduction the unit amplifies and reproduces extraneous noises however small into definite out put noise If your receiver produces a noise check according to the following table and trace out the source of noise for an appropriate corrective action The table includes the conditions that may be mistaken for troubles of the unit Symptom Suspected Source of Noise Diagnosis and Remedy When Listening to Broadcasts Continuous or intermittent noise like jjjjjj or zzzzzz Statics or listening Fluorescent lamp motor or thermostat may be used in house or in the vicinity of the house In many cases it is very difficult to remove the source of noise In order to increase the radio input larger than the noise level set up a good outdoor antenna and make a complete grounding When a station is tuned in hum is mixed in the program Poor fluorescent lamp motor or electric heater may be used in house or near the house Hissing sound noise in AM medium wave reception Static noise in FM reception in particular when auto mobiles run close to the house The frequency of an adjacent station is interfering with that
9. to the MAIN AMP INPUT terminals 29 Connect the PRE AMP OUTPUT terminals to the input terminals of the dividing band pass filter and the MAIN AMP INPUT terminals to the output terminals of one of the dividing band pass filters Connect the input of the other stereo po wer amplifiers to the output terminals of the other dividing band pass filters b When using 3 head tape deck or tape recorder for recording monitor can be conducted as follows Turn on the TAPE MONITOR switch 14 and the after recording signal will be monitored Turn off the switch and the before recording signal will be monitored 3 HEAD TAPE RECORDER Fig 16 ERASE HEAD 4 RECORD HEAD OFF TAPE MONITOR SWITCH INTEGRATE STEREO SYSTEM By connecting one or more of PIONEER s Model IS 60 IS 70 or IS 80 units which are separately available to the PRE AMP OUTPUT terminals 28 for both left and right channels respectively an integrate stereo system having minimum sound distortion can be composed Also a PA system to be used in a large place can be formed by using several power systems with MODEL SX 990 3 D STEREO SYSTEM A 3 D stereo system can be produced by connecting to the CENTER CHANNEL OUTPUT terminal 30 a power amplifier equipped with a low pass filter f 7 150 to 250 Hz CENTER CHANNEL LOUDSPEAKER SYSTEM By connecting a power amplifier and loudspeaker to the CENTER CHANNEL OUTPUT te
10. 2S 497 0 Transistor 2SC793 Y Transistor 2SC793 Y Transistor 2SC793 Y Transistor 25 793 Transistor STV 3 Varistor STV 3 Varistor POTENTIOMETERS Description 30KQ Semifixed 30KQ Semifixed 500 Semifixed 50Q Semifixed 27 POWER SUPPLY UNIT W16 022 CAPACITORS Description Part No Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Mylar Ceramic Ceramic Ceramic Ceramic RESISTORS Description Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film DIODES AND TRANSISTORS Description SB 3P Diode SB 3P Diode 1S3380 Zener Diode 2SC485 Transistor 2SC905 Transistor 2SC485 Transistor DIAL CORD STRINGING TUNING CAPACITOR H DIAL POINTER 28 Mr E TE Des PIONEER ELECTRONIC CORPORATION i 15 5 4 Chome Ohmori nishi Ohta ku Tokyo Japan PIONEER ELECTRONICS U S A CORPORATION PIONEER ELECTRONIC EUROPE AG 140 Smith St Farmingdale L I N Y 11735 U S A 59 Forch Strasse 8032 Zurich Switzerland PRINTED IN JAPAN lt 69KO5F04D gt lt R12 048 C gt
11. Description Part No Description Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film PUSH Switch PUSH Switch Knob for PUSH Switch SWITCHES Symbol Description Part No PUSH Switch PUSH Switch PUSH Switch Knob for Push Switch MAIN AMP UNIT W15 060 CAPACITORS Description Part No Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Ceramic Ceramic Electrolytic Electrolytic Electrolytic Electrolytic Ceramic Ceramic Mylar Mylar Ceramic WIS 081 Ceramic RESISTORS Description Part No CEN LYS mso A 110 YM Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Wire Wound Wire Wound Wire Wound Wire Wound Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Sz 0001 2 o STV 3 m DIODES AND TRANSISTORS Description 2SC732 Transistor 2SC732 Transistor 25 497 0 Transistor 25 497 0 Transistor 2SC497 0 Transistor 2SC497 0 Transistor 2S 497 0 Transistor
12. E21 004 0 Socket for AC OUTLET K82 007 B Jack for Speaker K73 003 A Jack for Microphone K72 020 0 Jack for Headphone K72 021 B Pilot Lamp Socket K42 003 0 Fuse Holder 1P K91 005 0 Connector 5P K93 003 B 18 FM FRONT END W11 028 CAPACITORS Description Part No Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Vriable Capacitor for FM tuner unit 4gang Cylinder trimmer RESISTORS Symbol Description Part No Ri Carbon film R2 Carbon film Carbon film R4 Carbon film R5 Carbon film R6 Carbon film R7 Carbon film Rs Carbon film Rs Carbon film Rio Carbon film Ru Carbon film Ri2 Carbon film R13 Carbon film COILS AND TRANSFORMERS Symbol Description Part No Ti FM Antenna Coil T2 FM IF Transformer Li RF coil L2 RF coil RF choke coil L4 RF choke coil L5 OSC Coil DIODE AND TRANSISTORS Symbol Description T24 028 T24 028 T23 032 B 01 2SK22 Y Q2 2SC461 B Transistor Q3 25 461 Transistor D 1 85 Variable Capacitance Diode 19 FM IF UNIT W12 025 CAPACITORS Description Part No Ceramic Ceramic Ceramic Ceramic Ceramic Mylar Ceramic Ceramic Ceramic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic RIFE c o o e LLL 08080808 S NS C
13. LN Carbon film LN Carbon film Carbon film Carbon film LN Carbon film LN Carbon film Carbon film Carbon film Carbon film TRANSISTORS Description Part No 2SC871 BL 2SC871 BL 2SC870 GR 2SC870 GR CONTROL UNIT W15 080 CAPACITORS Description Part No Electrolytic Electrolytic Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar RESISTORS Symbol Description Part No Ri R2 Rs R4 R5 R6 R7 R8 25 Carbon Carbon Carbon Carbon Carbon Carbon Carb n Carbon film film film film film film Fen R2 IK 04 5 o Wo K 3K AI SU o offe 2 vie Rio IK 2 Sg 4700P Ric 6 8K othe O Cu 400P Ris 68K elke Reo IK Ras 47K Cis Pr 33 6 3 R25 47K Rig e N 9 Cis 4700P m o on 520 ofo amp 4100 e JAN e C ee Ri IK 047 25 POTENTIOMETERS Description 9 N e Cs e oy Rs 33K 6420 SIN 100KQ dual 8 100KO dual TRE LE Control gt VR2b 100K Bo s VRID 100K VR2 100K VRia 100K PUSH SWITCH UNIT A W15 081 PUSH SWITCH UNIT B W15 082 CAPACITORS CAPACITORS Description Part No Description Part No Mylar Mylar Ceramic Ceramic M RESISTORS Description RESISTORS Carbon film Carbon film SWITCHES
14. cord to a commercial power outlet having a sufficient capacity 8 CO BN _ CONNECTION LOUDSPEAKER SYSTEM ANTENNA CONNECTION AND GROUNDING To connect a loudspeaker take out a speaker connector plug from the accessories bag and con nect it to the leads of the loudspeaker as illustrated in Fig 11 Be sure to connect them for the correct polarity When the plugs have been connected to loud speakers connect the plug of the right channel loudspeaker to the SPEAKER OUTPUT A terminal 31 and that of the left channel loudspeaker to the SPEAKER OUTPUT A terminal 32 See Fig 2 When using an additional loudspeaker system connect the speaker connector plugs to the loud speakers as described above and connect the plug of the right channel loudspeaker to the SPEAKER OUTPUT B terminal 33 and that of the left channel loudspeaker to the SPEAKER OUTPUT B terminal 34 FM ANTENNA When using Model SX 990 at a place of low field strength or distant from the station select the most suitable FM antenna as follows Use the accessory T type indoor antenna when using Model SX 990 within a wooden building near the FM radio station Connect the free and of the vertical section of the antenna to the FM antenna terminals 27 as shown in Fig 12 Expand the horizontal section of the antenna and determine its direction for good reception while actually receiving a broadcast program Fix the horizontal section
15. of the station being tuned in 10kHz beat interference 9 TV set is on the same house where the receiver White noises generated from automobile engines Radio frequency sewing machine or weld ing machine being used near your house Reversing the line plug may occasionally alleviate this noise problem Usually it is very difficult to eliminate the noise Impossible to remove such interference If the cause of such noise is in the TV set increase the distance between the TV set and receiver In an area surrounded by hills or high buildings the FM input signals are very weak Thus the noise limiter in the circuit loses its function Set up an outdoor FM antenna having many reflector elements Increasing FM input signal may alleviate this problem Use an exclusive FM outdoor antenna instead of the indoor T antenna Correct the conditions stated in a b c or d In case of e report it to an official activity and mixed with noise Treble is not clear L Reception of FM stereo 9 Note that the service area covered by an program contains more FM stereo broadcast is about 50 of noise than FM mono that of a regular mono broadcast program Hum buzz When Poor connection of shielded wire 9 switched to radio reception Jack connection is loose b the noise will disappear Line cord or fluorescent lamp is near the o shielded wire c a
16. ole Styrol 0 0033 5 C15011 0 Mylar 0 0022 50V CQMA222K50 Cw Mylar 0 0022 50V CQMA222K50 Electrolytic 22 25 CEMX22MF 25V 22 25 Styrol 0 0015 50 CQSA15X50 Styrol 0 0015 50V CQSA152K50 Electrolytic 0 47 50V CEMXR47MF 50V Electrolytic 0 47 50V CEMXR47MF 50V RESISTORS Description Part No Carbon film 15K RF MPS15K K Carbon film 15K RF KPSISK K Carbon film 12K RF MPS12K K 0000000 Carbon tiim 224 BF PS2R2H E Z Carbon tilm 4 78 RF YP SAR7K K Carbon film 3 3K RF MPS3R3K K MC 1304 Carbon film 10K RF MPS10K K 0000000 Carbon film 10K RF MPS10K K Carbon film 15K RF MPS15K K 120 i 6 AN e Carbon film 15K RF MPS15K K E i Carbon film 120 RF 4 PS120 K gt 3 Carbon film 1K RF 4 PSIK K gi9 s its 0047 Description Part No 19KHz Coil T75 018 A 19KHz Coil T75 018 A 38KHz Coil T75 019 A 38KHz Filter Coil 175 015 0 38KHz Filter Coil 175 0150 IC Symbol Description Part No Qi MPX 1C MC1304L POTENTIOMETER Symbol Description Part No VR 4 7KQ Semi fixed C92 051 0 21 MUTING UNIT 18 026 CAPACITORS INDICATOR UNIT W18 012 Description Part No Symbol Description Part No A CAPACITOR Ci Electrolytic 4 7 16V Electorolytic 16V C2 Electrolytic 22 35V C3 Mylar 0 0056 2006 50V RESISTORS 3 Carbon film Carbon film RE I TORS 2SA569 G Transistor Symbol Description Part No SD 1Z Diode Carbon film 33k Ro Carbon film 33k
17. signals FM INDOOR ANTENNA furnished with SX 990 ANTENNA D TERMINAL AC OUTLET 230 VA 230 VA UNSWITCHED GND AC LINE CORD ecord playback connector orovided on your tape connected to the APE REC P B n this receiver tion of the RECORD erminals to the receiver TAPE RECORDER Fig 2 STEREO SYSTEM The SX 990 is a general purpose stereo amplifier Connect to it the loudspeaker systems two or four turntable tape recorder etc which are separately available TURNTABLE RECORDER CARTRIDGE TAPE PLAYER Fig 3 INSTALLATION For installation of the stereo system select a place meeting the following Well ventilated and free from moisture and dust Unex posed to direct sunlight Far from heat radiators space heaters etc Stable without incurring vibrations LISTENING When the stereo system is installed listen to music according to the connection and operation in structions described below The reproduced sound is very different depending on the size of the room the furniture arrangement in the room and the materials of walls floor and ceiling Generally the reproduced sound fills the room if the room has a low ceiling and hard floor or the room has a small length and a hard wall opposing loudspeakers This undesirable acoustic condition can be much alleviated by laying a carpet on the floor for the former room and b
18. terminals and phono terminals and the provision for using a microphone make Model SX 990 suitable for the professional use as well as the family use e VARIETY OF ACCESSORIES Accessories include the program lamps that indicate the program being played the tuning meters vertically arranged for facilitating selection of an FM broadcast program the loudspeaker selector switch tape monitor switch etc all for enjoyable use of Model SX 990 e ELEGANTLY DESIGNED FRONT PANEL Newly designed knobs are uniguely arranged on the silver tone panel LINE VOLTAGE SELECTION AND FUSE SWITCHING LINE VOLTAGE SETTING AND FUSE In order to remove the fuse turn the fuse cap located on the line voltage selector switch in the direction indicated by an arrow Then remove the fuse plug from the unit Put the fuse plug back so that the proper line voltage marking can be seen through the cut in the edge of the plug Whenever the set position of the selector switch is changed check the rating of the fuse A 1 ampere fuse is to be used for either 220V or 240V operation and 2 ampere fuse for any of 110V 117V or 130V operation If the rating of the fuse is proper install the fuse in the fuse cap REPLACING OF FUSE When the fuse is blown remove the fuse cap and replace the fuse with a new one gt lt x FUSE CAP FUSE FUSE PLUG SOCKET Fig 1 Take off the fuse by turning it with a coin etc in the direction indicated by the arrow
19. to Model SX 990 the turntable connected to the PHONO 2 terminals cannot be used The equipment operates for monaural reproduction regardless of the position the MODE switch 15 is set to RECORDING AND PLAYBACK WITH TAPE DECK OR TAPE RECORDER TAPE MONITOR RECORDING The same signal as that reproduced from loudspeakers is always supplied to the TAPE REC terminals 22 According to the program source desired to be w recorded operate the SELECTOR switch 5 and MODE switch 15 referring to Reception of broadcast and Play of disk record The signal does not concern the VOLUME BASS or TREBLE controls of Model SX 990 Adjust the recording level with the controls provided on the tape deck or tape recorder NOTE If a monaural tape recorder is used either channel signal only can be recorded PLAYBACK Turn on the TAPE MONITOR switch 14 and adjust the VOLUME 11 BASS 7 and TREBLE 8 controls for desired volume and tone When the MONITOR switch 14 is in the ON position the position to which the SELECT OR switch 5 is set is unrelated to the eguipment operation IN ADDITION TO THE FOREGOING MODEL SX 990 CAN ALSO BE USABLE AS FOLLOWS MULTI AMPLIFIER SYSTEM A multi amplifier system can be composed by using a two or three division band pass filter and one or two stereo power amplifiers besides Model SX 990 a Remove the plugs which connect the PRE AMP output terminals 28
20. AUX AUXILIARY INPUT TERMINALS with a moving magent cartridge Connect here a turntable equipped with a ceramic or crystal cartridge NOTE Two turntable cannot be connected to the MAG and CER terminals simultaneously CER Connect here the output of a cartridge tape player 21 TAPE MON TERMINALS TAPE PLAY BACK INPUTS Connect the line output or monitor output of tape AUR 18 PHONO 2 MAG TERMINALS deck or tape recorder to these terminals Connect here a turntable equipped with a moving E 22 TAPE REC TERMINALS TAPE RECORD magnet cartridge ING OUTPUTS Connect the line input of a tape deck or tape recorder Signal is always supplied to these termi nals while SX 990 is working however the signal 30 CENTER CHANNEL OUTPUT TERMI cannot be controlled with the VOLUME 11 BALANCE 10 TREBLE 8 or BASS 7 control on the front panel 23 TAPE REC PB CONNECTOR DIN TYPE If the tape deck or tape recorder to be used with Model SX 990 is provided with a record playback connector of the DIN type the tape deck or tape recorder can be connected to Model SX 990 for both recording and playback and monitor by simply connecting the DIN cable When this cable is used connections to terminals 21 and 22 are unnecessary The detail of connection is shown on page 10 Connection of tape deck or tape recorder 24 AM FERRITE ANTENNA Where the field strength is high adjust the direction of
21. E boost 10 dB cut 9 5 dB at 10 kHz Filters LOW cut 8 dB at 50 Hz HIGH cut 7 5 dB at 10 kHz 13 O Ed Loudness Contour Switchable to ON OFF boost 12 dB at 50 Hz boost 9 dB at 10 kHz with VOLUME control set at 40 dB FM Section Circuitry Front end using FET and 4 gang variable capacitor IF amplifier 4 IC Frequency Range 87 5 to108 MHz IHF Usable Senisitivity 1 7 Image Rejection 87 dB at 98 MHz Signal to Noise Ratio 62 dB IHF rating Antenna Input 300 ohms balanced Multiplex Section Circuitry Time switching type de modulator FM Mono Stereo Automatic selection Channel Separation 42 dB at 1 kHz AM Section Circuitry Superheterodyne x Frequency Range 525 to 1605 kHz IHF Usable Sensitivity 18UV Image Rejection 77 dB at 1000 kHz Antenna Input Built in Ferrite Loopstick Antenna Power Supply Etc Line Requirements 110 117 130 220 and 240 volts switchable 50 60 Hz 210VA 190 watts Max Dimensions Overall 18 1 16 459 mm W 5 11 16 145 mm 14 2 1 369 mm D Weight without package 25 Ib 2 oz 11 4 kg with package 29 Ib 2 oz 13 2 kg CONDITIONS FREQUENTLY MISTAKEN FOR TROUBLES Noise There are a variety of noises relating to the operation of a hi fi unit These are generally divided into two types 1 the unit is faulty a transistor or part is deteriorated and 2 an external source of noise gives noise to the unit When a hi fi unit produces an unpleasant noise
22. d in Items 1 through 3 above re consider the antenna referring to the Antenna con nection and grounding on page 9 When the broadcasting station is very near a much distorted sound may result from the high field strength If this occurs shorten or remove the antenna connected to the AM antenna terminal 25 for the best radio reception PLAY OF DISK RECORD 1 Set the SELECTOR switch 5 to the PHONO 1 position when operating the turntable connected to the PHONO 1 terminals 17 on the rear panel Set the switch to the PHONO 2 MIC position when operating the turntable connected to the PHONO 2 terminals 18 2 If the turntable to be operated is monaural set the MODE switch 15 to the L or R position 3 Adjust the VOLUME 11 BASS 7 and TREBLE 8 controls for desired volume and tone PLAY OF CARTRIDGE TAPE 1 Set the SELECTOR switch 5 to the AUX position 2 The succeeding procedure is identical with its counterpart of Play of disk record above USE OF MICROPHONE SELECTOR SS PHONO 2 MICROPHONE Fig 15 11 J oo 1 Setthe SELECTOR switch 5 to the PHONO 2 MIC position Insert the microphone plug to MIC jack 16 Speak into the microphone Adjust the volume and tone as desired When the microphone is used near the loudspeaker system do not increase the volume wn too much or howling may occur When a microphone is connected
23. ed If Model SX 990 is used where the FM field strength is low keep this switch turned off since the program sound is also suppressed with the switch turned on channel input signal fed to both channel loudspeakers R eH Monaural play with only the right channel input signal fed to both channel loudspeakers LR Monaural play with both left and right channel input signals mixed together and reproduced from both channel loudspeakers 5 990 REV n LEFTO OLEFT gt ourdur Le RIGHTO ORIGHT STEREO LEFTO OLEFT ouTPuT D nior LEFT LEFTO OLEFT GWR ourPur RiGHTO ORIGHT LEFTO HT OLEFT INPUT ourPUr RIGHTO ORIGHT R p LEFTO OLEFT INPUT 1 Loi emm Fig 9 16 MIC MICROPHONE JACK When a microphone is connected to this jack the signal fed from the turntable connected to the PHONO 2 terminals 18 on the rear panel is disconnected PIONEER TERMINALS AND CONNECTORS ON THE REAR PANEL 17 1819202122 23 24 2526 27 O Fig 10 w The upper ones of the terminals 17 18 20 21 22 19 GND GROUND TERMINAL 1 28 and 29 are for the left channel respectively the If the turntable or other equipment used with lower ones for the right channel Model SX 990 is provided with a ground wire connect the wire to this terminal 17 PHONO 1 TERMINALS MAG Connect here a turntable equipped 20
24. eo indicator 3 lights and Model SX 990 operates automatically for stereo broadcast reception If the received program is monaural the indicator does not light and the equipment operates for monaural broadcast recep tion 4 When the desired station has been tuned in turn the VOLUME control 11 gradually clockwise for the desired volume Adjust the BASS 7 and TREBLE 8 controls as desired f Model SX 990 is used very far from the broadcasting station or where external noise is high the noise is suppressed and better reception can be attained by keeping the SELECTOR switch 5 set to the FM MONO position With the switch in this position however a stereo program is received as a monaural program f good radio reception cannot be attained by the operations instructed in Items 1 through 4 above reconsider the antenna referring to Antenna con nection and grounding on page 9 RECEPTION OF AM BROADCAST 1 Set the SELECTOR switch 5 to the AM position 2 While observing the pointer deflection of the tuning meter 2 tune the receiver to the desired station by adjusting the TUNING knob 4 The best radio reception is attained when the pointer of the lower tuning meter deflects largely rightward 3 When the desired station has been tuned in adjust the VOLUME 11 BASS 7 and TREBLE 8 controls for desired volume and tone If good reception cannot be attained by the tions instructe
25. er T61 041 8 Matching Transformer T61 041 8 AM Ferrite Loopstick Antenna T42 024 A Heater Choke Coil T24 026 0 Choke Coil T24 030 0 SWITCHES Symbol Description Part No 81 SELECTOR Switch 13 029 0 S2 MODE Switch S14 035 0 5 SPEAKERS Switch S11 022 A LINE VOLTAGE Selector S11 018 0 POTENTIOMETERS Symbol Description Part No 500KQ dual VOLUME C85 054 0 VR2 500KQ dual BALANCE C85 048 0 MISCELLANEOUS Symbol Description Part No FM FRONT END W11 028 C FM IF Unit W12 025 A MPX Unit W13 024 D AM TUNER Unit W14 008 0 MUTING Unit w18026 d INDICATOR Unit W18 012 0 HEAD Amp Unit W15 049 A CONTROL Amp Unit W15 079 0 CONTROL Unit W15 080 0 PUSH Switch Unit A W15 081 A PUSH Switch Unit B W15 082 0 MAIN Amp Unit W15 060 A POWER SUPPLY Unit W16 022 0 Front Panel M21 323 0 Dial Pulley M42 027 A Foot M61 017 0 Wooden Case M52 119 0 Dial Glass A33 084 A Dial Pointer A31 090 A Tuning Meter lower A91 009 B Tuning Meter Upper A91 008 B Knob Selector A12 163 0 Knob Tuning A12 165 0 Knob Speakers Volume Balance Mode A12 120 B Knob Bass Treble L A12 168 0 Knob Bass Treble R A12 016 0 Input Terminal K22 013 C 4P Input Terminal K22 010 A 1P Input Terminal K21 005 C 4P Antenna Terminal K11 018 0 Pilot Lamp for Dial Glass E22 017 0 Pilot Lamp ior Selector Position FM Stereo indicator E22 021 0 Pilot Lamp for Tuning Meter E22 002 0 Fuse 1A
26. eramic Ceramic Electrolytic Ceramic Electrolytic Electrolytic Ceramic RESISTORS Description Part No Carbon film Carbon film 470 Carbon film 56K Carbon film 470 Carbon film 56K Carbon film 6 8K Carbon film 2 2K Carbon film 33K Carbon film 22K Carbon film 100 Carbon film 220K Carbon film 820 film Carbon COIL AND TRANSFORMERS Description Part No T FM IF Transformer T2 FM IF Transformer Ts FM IF Transformer T4 FM IF Transformer RF Choke Coil Description T73 022 0 T73 022 0 T73 022 0 T74 009 0 T24 029 0 Part No HpA703E IC HA703E IC HA703E IC ATOE IC 1S188 FM 1 Diode 15188 FM 1 Diode 15188 FM 1 Diode 15188 FM 1 Diode 15188 FM 1 Diode 15188 FM 1 Diode Description Part No Compound Part for FM Detect W53 040 0 20 Ri3 33 ee O O Rs 56K lw EL Qi Ru 220K I I 1 1 1 1 lo 1 1 1 N e E os e W a 0 m 1 25 C20 D2 15188 MPX UNIT W13 024 CAPACITORS Cw Symbol Description Part No m 047 50 C Styrol 0 0022 50V C15 007 0 C2 Electrolytic i 50V CEMX IMF 50V Mylar 0 047 20 50V CQMA473M 50 00015 Styrol 001 5 C150100 Styrol 001 5 C150100 Electrolytic 22 35V CEMX 2R2MF 35V
27. f the DIN type connect the connector to the TAPE REC P B connector 23 by using the DIN cable that is separately available In this case connections as described in Connection for tape recording and Connection for tape playback or tape recording monitor above are unnecessary CONNECTION OF CARTRIDGE TAPE PLAYER When using a cartridge tape player such as PIONEER s Model H 60 connect its output to the AUX terminals 20 on the rear panel bO m m a eec ue SS eee 10 CC sss RECEPTION OF BROADCAST Set the SPEAKERS switch 1 to the A position after ensuring the following 1 The BALANCE knob 10 is in the NORMAL center position 2 The VOLUME knob 11 is in the MIN position turned fully counterclockwise 3 The MONITOR switch 14 is set to OFF 4 The MODE switch 15 isset to the STEREO position RECEPTION OF FM BROADCAST 1 Set the SELECTOR switch 5 to the FM AUTO position 2 Turn on the MUTING switch 18 Keep the switch turned off if the field strength is low 3 While observing the pointer deflection of the tuning meters 2 tune the receiver to the desired station by adjusting the TUNING knob 4 The best radio reception is attained when the pointer of the lower tuning meter deflects largely rightward and the pointer of the upper tuning meter indicates the center When the tuned in station is broadcasting a stereo program the FM ster
28. lamp corresponding to the select ed source lights 6 PHONES JACK When using a stereo headphone insert its plug into this jack For the headphone to be used with Model SX 990 PIONEER s Model SE 20 SE 30 or SE 50 is recommended When a longer cord is required for the stereo headphone use PIONEER s Model JB 23 extension cord separately available When desiring to connect two stereo headphones use PIONEER s Model JB 22 Y cord separately available 7 BASS CONTROL When this knob is turned clockwise bass is boosted when turned counterclockwise attenuated With the knob set to the center the frequency response curve is flat The center and outer knobs of this double knob are friction coupled with each other and the tone of both left and right channels can be adjusted simultaneously by turning either knob The center knob is for the left channel and the outer knob is for the right channel When adjusting the tone of only one of the channels turn the knob for that channel while holding the other knob by the other hand RIGHT CHANNEL CH R BEET CHANNEL CH L Fig 7 eS O s 14 MONITOR SWITCH Turn on this switch for listening to or monitoring only the signal reproduced by a tape deck or tape recorder When not using the tape deck or tape recorder keep this switch turned off Otherwise loudspeakers will not sound 8 TREBLE CONTROL Use of this knob is similar to that
29. mark REAR CONNECTIONS CRYSTAL CERAMIC TAPE RECORD PLAYER GND RECORDING boss MM TERMINAL REC P B AM ANTENNA TAPE CONNECTOR MAGNETIC RECORD AUX PLAYBACK DIN TYPE RECORD PLAYER PLAYER TERMINAL TERMINAL AUX REC MONITOR REC P B Y ALL TERMINALS ARE INTERNALLY PHONO PHONO2 M WIRED AS FOLLOWS MAG MAG TOP TERMINAL Left Channel AM FERRITE ANTENNA BOTTOM TERMINAL Right Channel LINE VOLTAGI SPEAKER OUTPUT SELECTOR TERMINALS FUSE HOLDE 49 169 p TURNTABLE ca E al ENTER CHANNEL SPEAKER TERMINAL PLUGS D MAGNET MM CARTRIDGE NOTE If the DIN type is recorder and i corresponding CONNECTOR separate conne CARTRIDGE and MONITOR TAPE PLAYER is not needed RIGHT CHANNEL RIGHT CHANNEL LEFT CHANNEL CHANNEL A SPEAKER SYSTEM B SPEAKER SYSTEM TAPE DEC NOTE 1 When only one set of speaker system is connected to the SX 990 The speaker impedance may be 4 to 16 ohms 2 Do not short the SPEAKER TERMINALS o ass sx gx OUTDOOR FM ANTENNA If the indoor antenna is not adequate for reception of FM prog rams Separately esta FM ANTENNA blish an antenna in the TERMINALS outside of the house for GND receiving FM
30. mp Poor grounding d 8 HAM transmitting station or TV transmit a ting station is near your house e 2 Output tone quality is poor Stylus is worn out z Record is worn out b Dust adheres to stylus c improper mounting of stylus d 9 Stylus pressure is not proper e The TREBLE sound level is too high Check a through e and correct the condition Lower the TREBLE level Further watch the following conditions These are also apt to be mistaken for troubles of the unit Symptom Power is not turned on al though the power switch is to ON Suspected Source of Noise Fuse is blown a Line plug is loose b Diagnosis and Remedy Check a and b and correct the condition In playing a record increas ing the volume will cause howling Distance between the record player and the speakers is too short The place on which the record player or speakers are set is unstable Change the distance or rearrange the installation posit ions of the unit and speakers Installing the record player on a firm solid stand may alleviate this problem Do not enhance the BASS sound level excessively 14 ALIGNMENT INSTRUCTIONS ALIGNMENT OF FM SECTION Disconnect OUTPUT terminal of front end from IN terminal of IF unit Position of Switch SELECTOR FM MONO
31. nerator Oscilloscope frontend Adjust for maximum FM Antenna V T V M deflection terminal OUT terminal CT1 2 106MHz 106MHz of frontend Repeat STEPS 13 and 14 several times EerioONCe i EE PARTS LAYOUT UR Ferrite Loopstick Antenna a EE VIEW POWER TARANSFOMER 173 020 52 159 1 LPF mace R i re are ATE MC 1304 T75 015 EM SERONT 1 5 Ta EL 741 008 250465 _ 1 025 17 025 YR Tr LITER CTz CT q os o z 250015 o o o o o ob 9 Ediaxoo7 250460 2504 el oliot B l 15 25 T z Y AM TUNER UNIT VARI CON WI4 08 E 064 030 ono voso owo o Electrolytic Capacitor 2200 80 052 071 MAIN SHIELD CASE MUTING UNIT FM MPX UNIT w13 024 Q FM IF UNIT w 2 025 INPUT SELECTOR 513 029 SELECTOR BALANCE VOLUME TUNING POWER amp SPEAKER BASS TREBLE SELECTOR Ferrite Loopstick Antenna BOTTOM VIEW Electrolytic Capacitor 052 071 POWER TARANSFOMER 2200 80 752 158 INDICATOR UNIT Wi8 012 m 280870 OS E Yo 990909 AC Bs E B B2 Q2 02 2800059 O r pa s 25045 2504850 ee
32. of the BASS control knob 7 9 FILTER SWITCHES LOW A switch for suppressing low frequency noise or hum HIGH A switch for suppressing high frequency noise 15 MODE SWITCH Functions as follows These switches are of the pushbutton type When Stereo with left and right channel the button is pressed once the switch turns on and input signals exchanged for each when pressed once again it turns off other STEREO Normal stereo 10 BALANCE CONTROL Monaural play with only the left This knob is used for adjusting the stereophonic balance When the volume of the right channel loudspeaker is smaller turn the knob clockwise toward RIGHT when left channel volume is smaller counterclockwise toward LEFT BALANCE When the volume of NORMAL When the volume of left channel 2 NI right channel loudspeaker is loudspeaker is smaller smaller LEFT RIGHT Fig 8 11 VOLUME CONTROL The volume increases when the knob is turned clockwise 12 13 and 14 are pushbutton switches Switches turn on when the pushbuttons are depressed once turn off when depressed again 12 LOUDNESS SWITCH With this switch turned on when the sound volume is low insufficiencies of bass and treble are com pensated for When the sound volume is high it is recommended to keep this switch turned off 13 MUTING SWITCH Turning on this switch the noise generated when tuning the receiver to an FM station can be eliminat
33. ome turntables are When using a monaural turntable its output provided with plugs which do not meet cord may be connected to either upper or lower the input terminals of Model SX 990 terminal In such a case replace the plugs with the To use two turntables both having 3 moving pin plugs contained in the accessories magnet cartridge connect one to the PHONO 1 bag CONNECTION OF TAPE DECK TAPE RECORDER The tape deck to be connected to Model SX 990 should have a record playback preamplifier built in such as PIONEER s Model T 600 T 500 w The tape recorder to be connected should have output terminals line output for external amplifier or tape monitor terminals CONNECTION FOR TAPE PLAYBACK OR TAPE RECORDING MONITOR Connect the LINE OUTPUT or tape monitor termi nals of the tape deck or tape recorder to the TAPE MON terminals 21 Use of the terminals is similar to that for the connection for recording described CONNECTION FOR TAPE RECORDING above Connect the LINE INPUT terminals of the tape deck or tape recorder to the TAPE REC terminals 22 on the rear panel For this connection use the cords accessory to the tape deck or tape recorder The upper terminal is for the left channel and the lower one is for the right channel If the tape recorder is monaural connect it to the upper terminal USE OF RECORD PLAYBACK CONNECTOR If the tape deck or tape recorder is eguipped with a record playback connector o
34. on a wall or other place in the determined direction For the operating procedure see Reception of FM broadcast on page 11 When using Model SX 990 at a long distance from the station or within a building install an outdoor FM antenna and connect it to the FM antenna terminals 27 as in Fig 13 The FM antenna is various in type consisting of 3 to 7 elements Select the optimum antenna by consult ing a nearby radio TV or hi fi equipment sales store AM ANTENNA When using Model SX 990 near the broadcasting station or inside a wooden building connection of an external AM antenna is unnecessary Adjust the direction of the AM ferrite antenna 24 located on the rear panel for the best radio reception while actually listening to broadcasts referring to Re ception of AM broadcast on page 11 SPEAKER TERMINALS LOUDSPEAKER SYSTEM SPEAKER PLUG POSITIVE NEGATIVE POSITIVE NEGATIVE Fig 11 1 good radio reception cannot be attained with the AM ferrite antenna 24 use the accessory AM lead wire antenna Connect one end of the antenna to the AM antenna terminal 25 and expand the wire along a wall of the room See Fig 12 If input is still not enough install an AM antenna outdoors instead of using the lead wire antenna See Fig 13 NOTE A standard AM outdoor antenna can be formed by purchasing PVC wire from an electric appliance store and installing it 25 feet 7 5 m ab
35. ove the ground for a horizontal length of 50 feet 15 m with a feeder line 30 feet 10 m long These antenna dimensions need not be so precise and may be as large as allowable by the place of installation However the height of the horizontal section of the antenna should not be too low to attain a good antenna effect FM OUTDOOR FM INDOOR ANTENNA ANTENNA AM INDOOR ANTENNA TURNER gt Fig 12 GROUNDING Whether or not Model SX 990 is grounded does not much affect the performance of the equipment However grounding is recommended for stabiliza tion of the performance Connect to the GND terminal 2 26 a ground conductor leading to the earth AM FERRITE ANTENNA CONNECTION OF TURNTABLE i If the turntable to be used is equipped with a moving magnet cartridge connect the output cords of the turntable to the MAG terminals of PHONO 1 17 on the rear panel if equipped with a ceramic cartridge to the CER terminals of PHONO 1 17 MAG terminals 17 and the other to the PHONO 2 MAG terminals 18 NOTE 1 When desiring to use a turntable equip ped with a moving coil MC cartridge use a matching transformer for MC cartridge or a separate head amplifier for Connect the left channel output cords of the connection of the turntable to MODEL turntable to the ur inal and the right SX 990 channel output cord ne lower terminal 2 The output cords of s
36. rminal 30 and placing the loudspeaker at the center between the left and right channel loudspeakers the hole effect of stereo sound can be prevented LOUDSPEAKER SPECIFICATIONS Transistors ICs and Diodes Tuner Section ICs Transistors Diodes 12 Audio Section Transistors Diodes etc Audio Section Circuitry Single ended push pull 80 100 watts total IHF rating Music Power Output a 49 130 watts total Continuous Power Output each channel driven 35W 35W 82 Continuous Power Output 28W 28W 8 Q both channel driven 30w 30w 422 Harmonic Distortion Less than 0 5 at 1 kHz rated output Frequency Response 3 dB from 10 Hz to 100k Hz Overall Power Bandwidth 15 Hz to 40 kHz AUX Hum amp Noise MAG better than 80 dB lat rated output AUX better than 100 dB Inputs Impedance MAGnetic PHONO 3 3 mv 50 k 1 kHz and Audio Sensitivity CERamic PHONO 24 mv 100k O 1 kHz for rated output MICrophone 5 mv 100 k Q 1 kHz TAPE MONITOR 200 mv 100 k Q 1 kHz AUXiliary 200 mv 100 k Q 1 kHz MAIN INput 530 mv 100 1 kHz Output Terminals Speakers 4 to 16 ohms and jacks Stereo headphones jack Simultaneous tape Recording jacks equipped with TAPE MONITOR switch Tape recording playback jack DIN standards Pre Output jacks Center Channel jack Equalization Curves PHONO RIAA Tone Controls BASS boost 11 dB cut 16 5 dB at 50 Hz TREBL
37. tereo loudspeaker systems Connect the first set of loudspeaker system system A to these terminals the right channel to terminal 31 and the left channel to terminal 32 33 amp 34 SPEAKER OUTPUT B TERMI NALS Connect the right channel loudspeaker of the second loudspeaker system system B to terminal 33 and the left channel loudspeaker of this system to terminal 34 For connection of loudspeakers to the SPEAKER OUTPUT A and B terminals the plugs supplied as accessories must be used Follow the instructions under Connection of loudspeaker system on page 9 for the correct use of the plugs 35 LINE VOLTAGE SELECTOR AND FUSE HOLDER This selector is used for setting the SX 990 to suit the line voltage to be supplied It also serves as a fuse holder For the selector setting and fuse replacement proce dures refer to the article LINE VOLTAGE SELEC TION AND FUSE Page 1 36 SWITCHED AUXILIARY AC OUTLET A power of 230 VA can be supplied to a turntable or other equipment from this outlet The power supply is turned on and off corresponding to the turning on and off operations of the SPEAKERS switch 1 on the front panel 37 UNSWITCHED AUXILIARY AC OUT LET The power outlet also having a capacity of 230 VA total The power from this outlet is supplied regardless of the operation of the SPEAKERS switch 1 38 AC POWER CORD After all the external equipment is connected to Model SX 990 connect this
38. this ferrite antenna for good reception without using an external antenna If good reception cannot be obtained see page 9 Antenna Connection and Grounding 25 AM ANTENNA INPUT TERMINAL Connect a lead wire or outdoor AM antenna to this terminal if the ferrite antenna 24 cannot get good reception 26 GND GROUND TERMINAL 2 Connect a ground wire to this terminal 27 FM ANTENNA INPUT TERMINALS Connect an FM antenna to these terminals NOTE For the details of AM antenna FM antenna and grounding see Antenna connection and grounding on page 9 28 PRE AMP OUTPUT TERMINALS The output of pre amplifier stage which is the signal having passed the tone control circuit is always supplied to these terminals 29 MAIN AMP INPUT TERMINALS These are input terminals of the power amplifier stage of Model SX 990 The PRE AMP OUTPUT 28 and MAIN AMP INPUT 29 terminals are connected to each other with the jumper plugs With these plugs removed the pre amplifier and power amplifier stage of Model SX 990 can be used apart This system is convenient for composing a multi amplifier system and other purposes NAL The signals of left and right channels are mixed together and supplied to this terminal at all times The terminal may be used for composing a 3 D system or connecting a center channel amplifier 31 amp 32 SPEAKER OUTPUT A TERMI NALS Model SX 990 is designed to permit connection of two sets of s
39. y covering the wall with a thick curtain for the latter room It is also an effective solution to change the arrange ment of furniture for irregular reflection of the loudspeaker sound yel E Vt ccs come M cM UNO 3 NON i m CONTROLS AND SWITCHES ON THE FRONT PANEL PROGRAM 1 2 3 INDICATOR LAMPS 4 5 BALANCE VOLUME b FILTER NORMAL k SPKR S OFF A fa 8 9 10 11 121314 15 16 Fig 4 1 SPEAKERS SWITCH POWER OFF The equipment is deenergized A combination of the power on off switch and the The power supplied from the loudspeaker system selector switch SWITCHED AC outlet 36 is discon tinued simultaneously 3 Sound is reproduced from the loud En SS speaker system connected to the IS BS SPEAKER OUTPUT A terminals 31 2 S NS and 32 P SS C SPKR OFF Loudspeakers stop sounding A A g BS NS ES B This position is selected when using a SPKR s OFF NE stereo headphone TR Diem The loudspeaker system connected to re re FI the SPEAKER OUTPUT B terminals aha PEREN 33 and 34 is put in operation SPEAKERS B nee The loudspeaker systems connected to SPEAKER OUTPUT A and B termi Fig 5 nals are put in operation 2 TUNING METERS When tuning the receiver to an AM broadcasting station adjust the TUNING knob 4 so the pointer of the lower one of the meters deflects largely rightward

PIONEEFI

Contents

Download Pdf Manuals

Related Search

Related Contents