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PIONEER'
o)/>f
SOLID STATE
sx-44(f
FM-AM STEREO RECEIVER
-w
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.
o Model SX-440 is set for240V operation when shipped.
lf this unit is used in a different line-voltage area,
read and follow "LINE VOLTAGE SELECTION AND
FUSE" on back cover. 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
lncluding PARTS LIST, CIRCUIT DIAGRAMS, TROUBLE
SHOOTING AND MOUNTING TEMPLATE,
PIONI,ER ELEGTRENTtr CURPtrRilTIOil
Yt{H $gltrI"Q wrt'L
PIONEE.R
FEATURES OF SX-44O
OSENSITIVE FM CIRCUIT
A high performance transistor is used in RF amplifier for excellent sensitivity. No distortion or cross modulation will be caused by
high input power.
OBUILT.IN MULTIPLEX CIRCUIT
Provides full-frequency response and a good separation between channels for excellent stereo effect.
OAUTOMATIC FM MULTIPLEX SIGNAL INDICATOR
A lamp lights automatically when receiver is tuned to an FM station transmitting stereo multiplex signals.
O EASY-TO.READ TUNING INDICATOR
The clear, easy-to'read Meter permits quick station selection'
OLOUDNESS CONTOUR CIRCUIT
Preserves musical balance and provides full dynamic range of reproduction, even at very low volume control settings.
OINDEPENDENT TONE CONTROLS
Separate bass and treble controls permit adjustment of tonal qualities to suit room acoustics and individual taste.
OFULL COMPLEMENT OF INPUTS
Stereo inputs are provided on the rear panel for record player with a magnetic, ceramic, or crystal cartridge; there are also
inputs for a tape recorder or tape deck; plus auxiliary input for TV sound or other sound source.
OTAPE RECORDING OUTPUT
Permits making stereo or monaural tape recording of any program material (AM, FM, FM stereo multiplex, or record) while the
material is being played.
OSTEREO HEADPHONE JACK
Permits private listening through a stereo headphone without disturbing other people. Located on the front panel for easy access.
O DUAL.CHANNEL HIGH-FIDELITY AUDIO POWER AMPLIFIER
High-efficiency power transistors are employed in the pushpull complementary circuit for each audio amplifier channel for full fidelity
frequency response.
LINE VOLTAGE SELECTION AND FUSE
Switching Line Voltage Setting and Fuse Fig. 1
ln 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.
Whenar'er the set position of the selector switch is changed,
check the rating of the fuse. A O.S-ampere fuse is to be used
for either 22OV or 240V operation and a 1-ampere fuse for any
of 1 lOV, 117V, or 130V operation. lf 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.
@
-T
FUSE CAP
Take off the fuse cap by turning it with a coin,
corN in the direction indicated by the arrow.
PIONEE.R
R MODEL SX.44O FMSTEREo
MONO l^ !Hlrr.c
FM 88 s s? 91 90 98 100 l0? t04 106 108 MHz
55 60 70 80 S0 100 l?0 140 160 x loKHz
TAPE VOLUME
SPEAKER MON LOUDNESS L __0_.R
AFF B
I
6 g 11 12 t3
Fig.4
15 1617 1B 1g
2B 21 22 23 24 25 26 27 28 29 30 3t 32 33
Fig.5
KNOBS AND SWITCHES ON FRONT PANEL
1. POWER SWITCH
Power is turned on when the s^ritch is rotated clockwise; turned When the s^,itch is set to the "A" position, the loudspeakers
off when rotated counterclockwise. Operation of this switch also connected to the SPEAKER SYSTEM A TERMINALS on the
turns on and off the power supplied to the AC OUTLET (3O) rear panel of the SX-440 emit sound; when set to "8". those
located on the rear panel of the SX440. connected to the SPEAKER SYSTEM B TERMINALS.
2. TUNING INDICATOR 9. BASS CONTROL
When tuninq the radio receiver to an FM or AM broadcast As this knob is turned clockwise, bass is boosted, as turned
station, the TUNING KNOB (4) is adjusted so that the pointer of counterclockwise, attenuated. The control is designed to give a
this meter may deflect to the maximum. flat characteristic curve when the knob is set to the middle sf
the rotation range.
3. FM STEREO INDICATOR oThis knob controls the tone quality of both right and left
When the SX-2140 receivesan FM stereo program, this lamp lights. channels simu ltaneously.
4. TUNING KNOB 10. TREBLE CONTROL
An AM or FM broadcasting station is tuned in. While observing Use of this treble control knob is similar to that of the BASS
the pointer of the TUNING INDICATOR (2), set the knob for CONTROL KNOB (9) ,
the best receiving condition,
5. SELECTOR SWITCH I 11. MODE SWITCH
When playing a disk record or tape, or receiving a broadcast
The SX-440 for one of the following operations:
is set
program, keep this snritch in the "STEREO" position. Set the
AM . . Reception of AM broadcasts
saritch to "MONO" only when using a monaural record player
FM MONO Reception o{ monaural FM broadcasts
or tape recorder, or reproducing a tape on which monaural
FM STEREO Automatically selective reception of stereo or
recording is made,
monaural FM broadcbsts
PHONO. . . . . Play of disk record I
12. TAPE MONITOR SWITCH
AUX ,. . Connection of a record player having a crystal For ordinary record play or radio reception, keep thiss^ritch in
or ceramic pickup, cartridge tape player, or the "OFF" position.
audio output of a TV receiver. Set the svvitch to "ON" only when playing back a tape by using
6. PHONES a tape recorder (or tape deck) or monitoring the recording
Cord plug of a stereo headphone is inserted here for enjoying condition of such equipment. lf the switch is set to the "ON"
position when conducting disk record play or radio reception,
stereo play without disturbing other people around. Loudspeakers
loudspeakers do not sound. Be careful in this respect.
stop emitting sound then. For the stereo headphone, PIONEER's
Model SE-2P, SE-20, SE-30 or SE-50 is recommended. 13. LOUDNESS CONTOUR SWITCH
. When a lonqer cord is required for the stereo headphone, use When the switch is set to the "ON" position while theSX-440
PIONEER's Model JB-23 extension cord separately available. is operated at a low sound volume, both bass and treble are
When desiring to connect two stereo headphones, use boosted for easy listening. When the equipment is operated at
PIONEER's Model JB-22 "Y" cord separately available. a high sound volume, it is recommended to keep the suritch in
the "oFF" position.
7. LOUDSPEAKER ON/OFF SWITCH
With this sruitch in the "ON" position, loudspeakers emit sound. 14. VOLUME CONTROL Fis.7
When the snritch lever is set to "OFF", loudspeakers stop The loudspeaker sound volume increases
sounding, lt is convenient for using a headphone, when this knob is turned clockwise; RIGHT CHANNEL
B. LOUDSPEAKER SELECTOR SWITCH it decreases when the knob is rotated
counterclockwise, This double knob con-
nn
sists of two component knobs interlocked
by friction. When the knob is turned,
both component knobs rotate together
to control the sound volumes of right
I " ooa't,o* and left channels simultaneously, To
adjust the volume of either right or left
channel alone, hold one of the component knobs by one hand
l and turn the other component knob by the other hand. lt is
-\
B
(LEFT] IRIGHT)
convenient for balancing the sound volumes of both channels.
The front knob is for the left channel and the rear knob is for
ffi .".o^r* the right channel.
/
Vq
A:i;?"-'"-
I o
"o.,',o* .
mm Fis. 6
TERMINALS AND CONNECTION ON REAR PANEL
15. FM ANTENNA TERMINALS 25. LAPE _ BECORDTNG / PLAYBACK CON_
An FM broadcast receiving antenna will be connected to these NECTOR (DIN TYPE}
terminals, Provided that the tape recorder (or tape deck) to be used has
16. GROUND TERMINAL 1
a DIN-type tape recording/playback connector, connection for
Connect a ground conductor to this terminal for grounding the recording and playback (and monitor) can be completed simply
SX- zl40 by linking the tape recorder with the SX440 through the
recording/playback cord that is separately available. When this
17. AM ANTENNA TERMINAL connector is used, terminals (23) and l24l are not used,
This terminal is provided for connecting an external AM
broadcast receiving antenna. 26&27. SPEAKER SYSTEM A TERMINALS
NOTE: For the most suitable FM antenna, AM antenna and Two speaker systems A and B can be connected to the SX44O ,
grounding, refer to the article "ANTENNA CON- and they can be selectively used by operating the switch (8).
NECTION AND GROUNDING". Connect the right channel loudspeaker of the firsl speaker
18. AM FERRITE ANTENNA systems to terminals (26) and the left channel loudspeaker to
An AM broadcast receiving antenna accessory to the SX-440 terminals (27).
When using the SX44O where the f ield intensity is high, recep-
tion cah be conducted simply by adjusting the direction of this
28 & 29. SPEAKER SYSTEM B TERMINALS
When using two speaker systems, use these terminals (28) and
antenna without connecting an external antenna to the AM (29) for the second systems. Connect the loudspeaker for the
ANTENNA TERMINAL (17). right channel to terminals (28) and those for the left channel
19. PROTECTIVE FUSES to terminals (29).
These fuses protect transistors in the SX-440 .When loudspeaker
NOTE: For connection of loudspeakers to these terminals,
terminals are short-circuited, or the SELECTOR (5) on the front the plugs contained in the accessory bag must be used.
panel is operated while the SX-440 is used at a high sound For correct loudspeaker connection, refer to the article
,,CONNECTION
volume, one or both of the fuses may blown to protect power OF LOUDSPEAKER SYSTEMS".
transistors. When this occurs, replace the blown fuses with the
accessory 2-ampere fuses. The right-hand side fuse is for the left
30. AC OUTLET ISWITCHED)
The power obtained from this AC outlet is turned ON and OFF
channel; the left-hand side fuse is for the right channel.
interlinked with the operation of POWER SWTTCH (1), A
20. MAGNETIC PHONO TERMINALS maximum of 20O VA can be supplied to the record player or
Connect here the output cords of a record player equipped other equ ipment connected"
with a magnetic cartridge. The upper jack is for the left channel; 31. AC OUTLET (UNSWITCHED)
the lower jack, for the right channel. When connecting a An AC outlet having a capacity of 2O0 VA.This power outlet
monaural record player, use either one of the iacks.
is not interlinked with the operation of POWER SWITCH (1).
21. AUXILIARY TERMINALS 32. LINE VOLTAGE SELECTOR AND FUSE
These jacks are used when connecting the output cords of a
record player equipped with a crystal or ceramic cartridge, or a
HOLDER
cartridge tape player. Also use these jacks for reproducing the
This selector is used for setting the SX-44O to suit the line
voltage to be supplied. lt also serves as a fuse holder. For the
audio output of a TV receiver. The upper jack is for the left selector setting and fuse replacement procedures, refer to the
channel; the lower jack, for the right channel.
article "LINE VOLTAGE SELECTTON AND FUSE". (page 1)
22. GROUND TERMINAL 2 33. AC CORD
lf the record player or other equipment to be used with the After correctly setting the LINE VOLTAGE SELECTOR (321,
SX-440 has a ground conductor, connect it to this terminal.
connect this cord to an outlet of the commercial power line.
23. TAPE MONITOR TERMINALS
Connect to these jacks the playback output terminals (line
output) or monitor terminals of the tape recorder (or tape
deck) used with the SX-44O
24. TAPE RECORDING TERMINALS
Connect to these jacks the recording input terminals (line input)
of the tape recorder (or tape deck). The signals outgoing from
these terminals cannot be adiusted with the VOLUME (14),
BASS (9) or TREBLE (1Ol controls.
NOTE: For correct connection to the TAPE MONITOR (23)
andTApE RECORDING l24l jacks, refer to the articte
,,CONNECTION
OF TAPE RECORDER"
PIONEI.R
CONNECTION OF LOUDSPEAKER SYSTEMS
Fig. 8
. When connecting loudspeakers, extract speaker connector
plug from the accessory bag and connect the speaker wire
lads to the plugs and illustrated below. Be sure to connect
the positive of the leads to the positive terminal of the plug.
.When the loudspeakers are connected to the plugs. insert the SPEAKER TERMINALS
right channel speaker plug into the speaker system A terminal
socket (26) and the left channel speaker plug into the speaker
system A terminal socket (27). (Refer to the connection
diagram shown in page 2 .)
.When using two speaker systems, connect the wire leads of
the second speaker systems to speaker plugs as described
above, and insert the right channel speaker plug of this speaker
system into the speaker system B terminal socket (28) and the
left channel speaker plug into the speaker system B terminal ER
socket (29). SPEAKER PLUG
ANTENNA CONNECTION AND GROUNDING
FM T'TYPE INDOOR ANTENNA
rFM BROADCAST RECEIVING ANTENNA:
The field strength of FM broadcast is much attenuated behind
mountains and buildings, and in ferroconcrete buildings. This
requires to use an FM antenna of different type depending on
the area and place where the SX44O will be used. Use the most
suitable antenna, referring to the following:
o Employ the T-type indoor antenna accessory to the SX440
when using the SX-440 within a wooden building near the FM
radio station. Connect the end of the vertical section of the
T-type antenna to the FM ANTENNA TERMINALS (15) as
shown in Fig. 9, and expand the horizontal section of the T-
type antenna. While actually receiving broadcast, determine the Fis. 9
direction of the horizontal section for the best radio reception ,
and fix it on a wall or other place. Refer to the article FM OUTDOOR ANTENNA
"RECEPTION OF FM BROADCAST" reprding the determi-
nation of the antenna direction.
. When using the SX-44O afar from the broadcasting station,
behind a mountain or within a ferroconcrete building, install
an FM radio antenna (or FM/TV common antenna) outdoors
and connect it to the FM antenna terminals (15). The FM
antenna is various in type, having 3 to 7 elements. Select the
most suitable antenna by consulting a nearby radio antenna
sales store,
NOTE: The installation procedure of FM radio antenna is
similar to that of TV antennas. For details, followthe
instructions accompanying the FM radio antenna
purchased.
rAM BROADCAST RECEIVING ANTENNA:
. When using the SX440 near the broadcasting station or
inside a wooden building, it is unnecessary to install an AM
antenna. ln crch an area, set the direction of the AM FERRITE
Fig. 10
ANTENNA for the best radio reception while actually listening
to broadcasts. Refer to the article "RECEPTION OF BROAD-
CAST".
. lf good reception cannot be attained wen by properly adjust-
ing the direction of the AM FERRITE ANTENNA, use the
accessory AM lead wire antenna. Connect one end of the
antenna to the AM ANTENNA TERMINAL ('17) and expand
the wire along a wall of the room.
. lf good reception cannot be attained even when the accssory
lead wire antenna is used, install an AM antenna outdoors.
Connect the lead-in wire of the outdoor antenna to the AM
ANTENNA TERMINAL (17).
CII
NOTE: For the outdoor antenna, a standard AM broadcast
antenna can be formed by purchasing pVC wire from
IGROUNDING:
o Groundingor non-grounding the GROUND TERMINAL 1 (16)
an electric appliance shop and installing it 25 feet
(7.5 m) above the ground for a horizonial length of does not much affect the performance of the SX-440.
50 feet (15 m), with a feeder line 30 feet (1O m) long. However, it is desirable to ground the terminal from the view-
point of safety.
These wire lengths may not be so price and may . Connect to the GROUND TERMINAL 1 (16) the ground
be as long as allowed by the place of installation.
However, the height of the horizontal section of the conductor leading to the earth.
antenna should not be too low to attain a good
antenna effect.
CONNECTION OF RECORD PLAYER
. lf the record player to be used with the SX-440 has a When using a monaural record player, connect its output
magnetic cartridge, connect the output cords of the record cord to the upper (left channel) terminal.
player to the MAGNETIC PHOI\O TERMINALS (2O); if the NOTE: lf the output cord plug of the record player to be
record player has a crystal or ceramic cartridge, connect the connected does not fit the input terininal jack of the
output cords to the auxiliary terminals. lnsrt the output cord SX-2140 , replace the plug with the pin plug contained
plug for the left channel into the upper terminal jack, and that in the accessory bag,
for the right channel into the lower terminal jack.
CONNECTION OF TAPE RECORDER (OR TAPE DECK)
. The tape recorder to be used with the SX-44O should have r CONNECTION FOR PLAYBACK (OR TAPE
an output terminal (line output) for connection to external RECORDING MONITOR):
amplifier, or a tape monitor terminal.
o When using a tape deck, the tape deck should have a recording/ Connect the playback output terminals (line output or tape
playback preamplifier built in. PIONEER's Model T-500F monitor terminals) of the tape recorder (or tape deck) to the
separately available can be used with the SX44O without TAPE MONITOR TERMINALS (23). Tne connecting procedure
any problems. is similar to that of the above "CONNECTION FOR RE-
CORDING".
TCONNECTION FOR RECORDING: r USE OF TAPE REC/P.B. CONNECTOR:
Connect the recording input terminals (line input) of the tape lf the tape recorder (or tape deck) to be connected to the
recorder (or tape deck) to the TAPE RECORDING TERMINALS SX440 has a recording/playback connector of DIN type,
(24l. of the SX-440 . For this connection, use the cords which @nnect it to the TAPE REC/P.B. CONNECTOR (25) of the
are normally accessory to the tape recorder. SX-44O . Disregard "CONNECTION FOR RECORDING" and
The upper one of the recording input terminals (line input) ,,CONNECTION FOR PLAYBACK'"
is for the left channel; the lower one, for the right channel.
When the tape recorder is monaural, connect its input terminal
to the upper TAPE RECORDING TERMINAL (24l. .
CONNECTION OF CARTRIDGE
TAPE PLAYER
When using the cartridge tape player {PIONEER's Model H-60E),
connect its output to the AUXILIARY TERMINALS (21). The
connecting procedure is similar to that for record player connec-
tion,
IPIONEER
RECEPTION OF BROADCAST
r BEFORE TURNING ON THE POWER SWITCH
OF THE SX.44O, CHECK THE FOLLOWING:
VOLUME CONTROL KNOB (14) is set to "MtN".
TAPE MONITOR SWITCH (12) issetto "OFF".
MODE SWITCH (11) set to "STEREO".
SPEAKER ON/OFF SWITCH (7) is set to "ON".
(lf using a stereo headphone, set the s^/itch to "OFF").
r RECEPTION OF FM BROADCAST: TRECEPTION OF AM BROADCAST:
1, SEt thE SELECTOR KNOb (5) tO thE "FM STEREO" 1. Set the SELECTOR knob (5) to the "AM" position.
position. 2. While observing the pointer deflection of the TUNING
2. While observing the pointer deflection of the TUNING INDICATOR (2). tune the SX440 to the desired station by
INDICATOR (2), tune the SX-440 to the desired station by using the TUNING knob (4). The best reception is attained
using the TUNING knob (4) . The best reception isattained when the pointer of the TUNING INDICATOR (2) largely
when the pointer of the TUNING INDICATOR (2) largely deflects rightward.
deflects rightward. lf the tuned station is broadcasting a 3. When the desired station is tuned in, adjust the VOLUME
stereo program, the STEREO INDICATOR (3) lights. With CONTROL (14), BASS CONTROL (9) and TREBLE CON-
the SE LECTOR knob (5) in this position, monaural TROL (10) for desired sound volume and tone quality.
programs can also be received. 4. When good radio reception cannot be attained, such as
3. When the desired station is tuned in, gently turn the speaker sound is noisy or inferior in tone quality by the
VOLUME CONTROL knob (141 clockwise. Ad.iust the above operating procedures 1 to 3, re+onsider the antenna,
BASS CONTROL (9) and TREBLE CONTROL (10) for the referring to the article "ANTENNA CONNECTION AND
desired tone quality. GROUNDING". When the SX-440 is used very near the
.When the SX-2140 is used very afar from the broadcasting broadcasting station, the field intensity is sometimes too
or external noise is intensive, the noise is sup-
station, strong, resulting in low tone quality. lf this occurs, shorten or
and better reception is attained by setting the
pressed remove the antenna connected to the AM antenna terminal
SELECTOR knob (5) to the "FM MONO" position. for the best radio reception.
When the knob is in this position, however, stereo programs
are received as monaural programs. (The stereo indicator is
unrelated although it lights.)
4. When good radio reception cannot be attained by the
above operating procedures 1 to 3. reconsider the antenna,
referring to the article "ANTENNA CONNECTION AND
GROUNDING".
OI
PLAY OF DISK RECORD
Set the SELECTOR knob (5) to the "PHONO" position. lf
1.
the record player used a crystal or ceramic cartridge, set the
knob to the "AUX" position.
2. When using a monaural record player, set the MODE SWITCH
(11) to the "MONO" position.
3. Adjust the voLUME, BASS and TREBLE CONTROLS for
desired sound volume and tone quality.
PLAY OF CARTRIDGE TAPE
1, Set the SELECTOR knob (b) to the ,,AUX', position.
2. The succeeding procedure is similar to its counterpart of
the disk record player operation.
RECORDING AND PLAYBACK
WITH TAPE RECORDER
(oR TAPE DECK
IRECORDING: I PLAYBACK:
The same signals as those emitted from loudspeakers can always
be taken out from the tape recording terminals (241 of the set the TAPE MONTTOR SWTTCH (12) to the ,'oN" position.
SX-40 .Operate the selector knob (5) and mode switch (11) Adjust the VOLUME. BASS and TREBLE CONTROLS for
desired sound volume and tone quality.
according to the program source to be recorded, following the .When the TAPE MONITOR SWTTCH (12) is in the "ON"
instructions described in articles "RECEPTION OF B ROADCAST"
position, the position of the SELECTOR knob {5) is unrelated
and "PLAY OF DISK RECORD"
to the playback operation.
The volume, bass and treble controls of the SX44O cannot be
used for the tape recording. The recording lwel should be r TAPE
adjusted by the control of the tape recorder (or tape deck). MONITOR:
NOTE: When using a monaural tape recorder, signals of either lf the tape recorder used with the SX-44O is provided with a
left or right channel only can be recorded. monitor circuit, monitor can be effected regardless of the tape
recorder being two-head or three-head type. Connect the tape
recorder to the SX440 recording and playback terminals. By
3 HEADS.TYPE TAPE setting the TAPE MONITOR (121 from "OFF" to "ON" while
RECORDER
making recording, the signals applied to the recording head can
be monitored if the tape recorder is of the two head system. lf a
three-head tape recorder is used, recorded signals can be monitor-
ed immediately after recording.
RECORDING
HEAD PLAY BACK HEAD
ERASING
HEAD
LINE INPUT LINE OUTPUT TERMINAL
TERMINAL
TAPE MONITOR SPEAKER
TAPE REC. TERMINAL TERMINAL SYSTEM
TAPE IV]ON
INPU
TERMINAL
MODE/ TAPE MON SWTTCH
Fig.'12
10
PTONEER
ALIGN M ENT INSTRUCTION
Please read these instruction with extreme care before attempting alignment.
* Test Equipment.
1)Standard Signal Generator. 2) VTVM, DC, AC 3) Oscilloscope.
" Attention on Alignment,
1) Signal Generator lnput: Always use the minimum generator input that provides a satisfactory output indication.
2) When connecting the test equipment to the input, use a shielded wire that is as short as possible.
ALIGNMENT OF AM SECTION
* VTVM and oscilloscope should be connected in parallel at the output.
Position of Switch: SELECTOR . . . AM
Volume Control Setting: Fully counterclockwise
i nput Alrgnment
Output
Dial
Step Eq u iprnent
Eq u i pment S etting
F req uency Level C on nections Adj ust Rema rks
C on nections
Sweep generator Point of no Tzos
I 455kH z 5 0dB
interference 0sci lloscope T zot Adjust for maximum sensitivity and
Antenna terminal as near as sVmmetrical characteristics.
Itir Tzoa
dummy 535kHz
Signal generator to antenna ter
2 600kH
minal through dummy z 30dB 600k H z T zas Adjust for maximum deflection.
3 1,400k Hz 1,400k H z CT
4 Repeat steps 2 a"d i severa' times.
S gnal generator 600kH z Ferrrte
5
0scilloscope Antenna
Antenna terminal (Adj Adjust for maximum difldcction.
(B usting
30d B
dummy core)
6 I,400k Hz l.400k H z CT zos
7 Repeat steps 5 and 6 several times
DIAL CORD STRINGING
CDI
ALIGNMENT OF FM SECTION
Position of Switch: SELECTOR FM MONO
Volume Control Setting: Fully counterclockwise
Disconnect TP zoL from TP zoz
I npul
0 utput A lign ment
STEP Dial
Eq ui pmeni
Eq ur pment S etting
F req uency Level C on nectlons Adjusl Rema rk s
C on n ections
Point of no I zot, f zoz
Sweep generator to FlVl antenna
10.7M H z i 0dB
r nterference Oscilloscope T zo:, Adjust for maximum sensitivity and
term ina L as near as TP zot Primary of symmetrical characteristics.
87MHz T zoc
2
I 00dB Check symmetry of characteristic
c urve,
Adjust the primary core of Tzoa 56
that slope of straight portion of "S"
3 70dB
Oscilloscope curve will become the steepest and
T zaq
TP zo: adjust the secondary core so that
the center of "S" curve wiil coinclde
with the center of the marker.
4 Connect TP 2ar Ia fP2a2
20dB
FM antenna
5
,'J,tlilri'"""o' 'o ] no, *. (400H z, 90MHz 0scii loscope L2o4 Adjust for maximum deflection.
30%) TP zo:
6 106M H z 106MHz CT:o:
7 Repeat steps 5 and 6 several times
20dB
,o Fr\4 Antenna
8
:J:;il,:.".""' I nor r. (400H z, 90MHz 0sci lloscope Adjust maximum
30"/" ) TP zo:
l'ri:, defrection.
9 CT zor
106MHz l06MHz
CI zoz
10 Repeat steps 8 and 9 several times.
ALIGNMENT OF MPX SECTION
Position of Switch: SELECTOR . , FM STEREO
Volume Control Setting: Fully counterclockwise
lnput Signal: Main (L+R) 40.5kHzdeviation (602)
19 kHz Pilot 7.5 kHz deviation (102)
I npul Alignment
STE P Circuit to be adjusted Connect VTVI\4
C on nections S ignal Ad i ust Rema rk s
I l9kHz and 38kHz
MPX Generator to f zog
stages
FIV Antenna terminal
l9kH z AC VTVM TPzos Adlust for maximum deflection
T zro
Separation Control Adjust for mrnirnum deflection
2 lorR AC VTVM 2 or 3 T zro
of the other channel
3 Repeat steps 7 and 2 several times.
PIONE.[.R
MODEL SX-44O TECHNIGAL SPECIFICATIONS
. TRANSISTORS AND DIODES o FM SECTION
Circuitry Front end using "F.E.T." and
Tuner Section 3 gang variable capacitor.
F,E.T. 1 Frequency Range 87 - 108 MHz.
Transistors 1 1 IHF UsableSensitivity 2.SttV
55 dB (at 98 MHz.)
D iodes 17 lmage Reiection
Audio Section Signal-to-noise Ratio 5O dB {lHF rating}
Transistors 20 Antenna lnPut 30O ohms (balanced)
Diodes and etc. 6
.AUDIO SECTION .MULTIPLEX SECTION
Circuitry Single ended push-pull Circuitry Time-snritching type demodu-
Music Power Output 4C} 40wattstotal (lHF rating) lator. FM mono/stereo
8,fl 33wattstotal (lHF rating) automatic selection
RMS Rated Power Output 4fl 15 watts per channel Channel Separation 35 dB (at 1 kHz.)
(both channels driven)
8Cl 12 watts per channel
(both channels driven) o AM SECTION
Harmonic Distortion Less than 1 z (at lkqz rated Circuitry Superheterodyne
output) Frequency Range 525 1605 kHz.
Frequency Response 3dB, f rom 20 Hz to 70 kHz IHF Usable Sensitivity 8pV
(overall) lmage Rejection 47 dB (at .1OO0 kHz.)
Power Bandwidth 30 Hz to 20 kHz (AUX) Antenna lnput Built in ferrite loopstick
Hum & Noise (at rated output) MAG: better than 75 dB antenna
AUX: better than 85 dB
lnputs and Audio Sensitivity MAGnetic PHONO: 3 mv.
(for rated output) TAPE MONITOR: 130 mv. o PIOWER SUPPLY ETC,
AUXiliary: 130 mv. Line Requirements 11O, 117 , 13O,22O,240 volts,
Speakers: 4to 16 ohms.Stereo (wvitchable),
Output Terminals and Jacks
headphones jack. Simu ltaneous 5O/6O Hz.8O watts (max.)
tape Recording jacks, equ ipped Dimensions Overatt
with TAPE MONITOR sruitch. 15-15 I 16" I 4}5mm (width)
Tape recording/plaYback jack 5-7 | 1 6" I 139mm ( height)
(DlN standards) 15' /358mm (deothl
Equalization Curve PHONO: RIAA Without Package 17lbs. 7.7k9
Tone Controls (each channel) BASS: boost 13dB,cut 11dB With Package 20lbs.8 oz. 9.3k9
(at 50 Hz)
TREBLE:boost 9.5d8, cut
10dB (at 10 kHz)
Loudness Contour Switchable to ON-oFF. Boost
12 dB at 50 Hz, boost 6 dB at
1 0 kHz, with VOLUME control
set at - 40 dB
OI
CON DITIONS FREQU ENTLY M ISTAKEN TO TROU BLES
Noise: There are a variety of noises relating to the operation of and the high fidelity in reproduction, the unit amplifies and
a hi-fi unit. These are generally divided into two types; (1) the reproduces extraneous noises, however small, into definite out-
unit is faulty (a transistor or part is deteriorated) and (21 an put noise. lf your receiver produces a noise, check according
external source of noise gives noise to the unit. to the following table and trace out the source of noise for
When a hi-fi unit produces an unpleasant noise, it is often judged an appropriate corrective action.
that the unit is faulty, but statistical records indicate that the The table includes the conditions that may be mistaken to
majority of noises produced in a hi-f i acoustic units result from troubles of the unit.
external sources of noise. Due to the inherent high sensitivity
Symptom Suspected Source of Noise Diagonosis and Remedy
Continuous or intermittent . Statics or listening. ln many cases, it is very difficult to remove the source
noise like jijjij ot zzzzzz, a Flourescent lamp, motor, or thermostat of noise. ln order to increase the radio input larger than
may be used in house or in the vicinitv the noise level, set up a good outdoor antenna and
o of the
o house. make a complete grounding.
o
a
o When a station is tuned a Poor fluoresent lamp, motor, or electric Fleversing the llne plug may occasionally alleviate this
ID in, hum is mixed in the heater may be used in house or near the noise problem, Usually it is very difficult to eliminate
program . hou se. the noise.
o
.!
c Hissing sound noise in AM a The frequency of an adjacent station lmpossible to remove such interference. lf the
is cause of
o (medium wave) reception. interfering with that of the station being such noise is in the TV set, increase the distance
.9
J tuned in (1okHz beat interference). between the TV set and receiver.
c . TV set is on in the same house where
o
I the receiver.
3
Static noise in FM reception a White noises generated from automobile ln an area surrounded by hills or high buildings, the
(in particular, when auto- engines. FM input signals are very weak. Thus the noise limiter
mobiles run close to the a R adio f requepcy sewing mach ine or weld- in the circuit loses its function. Set up an outdoor FM
house). ing machine being used near your house, antenna having many reflector elements.
Reception of FM stereo a Note that the service area covered by an lncreasing FM input signal may alleviate this problem"
program contains more FM stereo broadcast is about 50 % Use an exclusive FM outdoor antenna instead of the
noise than FM mono that of a regular mono broadcast. indoor T-antenna.
proqram.
Hum or buzz, When a Poor connection of shielded wire (a). Correct the conditions stated in (a), (b), (c) or (d).
o
o switched to radio reception, a Jack connection is loose. (b) ln case of (e), report it to an official activity.
o the noise will disappear, a Line cord or fluorescent lamp is near the
cc
o shielded wire, (c)
.g o Poor gyounding. (d)
s a HAM transmitting station or TV transmit-
o- ting station is near your house, (e)
c
o
Output tone quality is poor . Stylus is worn out. (a) Check (a) through (e) and correct the condition,
3 and mixed with noise. . Record is worn out. (b) Lower the TREBLE level,
Treble is not clear. . Dust adheres to stylus. (c)
.lmproper mounting of stylus. (d)
a Stylus pressure is not proper. (e)
. The TREBLE sound tevel is too high. Lower the TREBLE level,
Further, watch the following conditions: These are also apt to be mistaken to troubles of the unit.
Symptom Suspected Source of Noise Diagonosis and Remedv
Power is not turned on al- o Fuse is blown. (a) Check (a) and (b) and correct the condition.
though the power switch is . Line plug is loo*.
'
(b)
set to ON.
ln playing a record, increas- a Distance between the record plaver and Change the distance or rearrange the installation posit-
ing the volume will cause the speakers is too short. ions of the unit and speakers. (lnstallinq the .ecord
howling. a The place on which the record player or plaver on a firm, solid stand may alleviate this problem.)
speakers is unstable. Do not eR+tnce the BASS sound level excessively.
PARTS LIST OF THE SX-44O
0APACIT0RS tN pF lo% TOLERANCE UNLESS OTHERWISE NOTED
P: ppF
Symbol Description Part No S6 Toggi Switch s42.O22.A
Sr
Cr Cerami c 0.01 DCI .4K\ 43.O0 3 -C Se Line Voltage Selector s11,O18-O
Cz
C: Eiectrolytic l 000 35V 5 2.046.A
Ca 100 10v
Cs Ceramic 1 80P 50v M I S CE LLAI{E (lUS
Ce
Cr N4yl ar 0.0 2 + zOaZ Symbol Description Part No
Cg
Cs Electrolytic 1 000 16V 5 1 -021 .C
C ro AF Unit w15- O73-A
Ltl Mylar 0.1 + zoaz 50v Tuner Unit w3 5.007.o
C r: Power Suppty Unit w16.021-0
C i: Ceramic 0.01 DCt.4K\ 43.O03-O Front Ponel M2t.267 -O
Plustics Panel M2r.27 t.O
BESI STt]HS Wooden Case tM3 3-086,D
IN OHIVS,lO'. TOLERANCE UNLESS OTHERWISE NOTED Screw, to f ix Wooden Case B I I -022.8
K : KO I\,4 Mcr Dial Pulley, for Tuning Capacitor M42.0 18,E
Symbol
Dial Pulley M4 2-009.8
Descriptlon Part No
Dial Glass A 33-O74.O
Carbon Film 15K %w Dial Pointer A 3 r,087,O
Foot Mtt I -01 7.o
Tuning tvleter A9l .007.o
22K
Knob, Bass, Treble, Power A12-131,O
Knob, Volume ( L) A12.134-O
0.5 2Vl Knob, Volume ( R) A13.0 r 3,O
Knob, Selector A12.136.O
Knob, Tuni ng A12 139.O
Pilot Lamp E22.O12.O
Carbon Film
E22.Or5.O
R 10 ,4w Pilot Lamp socket K41 ,002 ,B
R
Fuse 0.5A E21.OO7.O
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