Pioneer SX-3800 User manual

Sefvice nual
FM Ouartz Locked
STEREO
RECEIVER
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

MODEL
SX.38OOCOMES
INFOUR
VERSIONS
DISTINGUISHED
AS
FOLLOWS:
Type Volt4e Remarks
KU 120Vonly U.S.A.model
s/G 1
10V, 120V, 22QV,
and
240V (Switchable) U.S.Militarv model
s110V, 12OV,
22OY
, and
24OV(Switchabte) General
exDortmodel
KC l20V only Canada
model
r This
servicemanualisapplicable
to theKUtype.
When
repairing
the
S/Gand
SWpe,
please
see
theadditional
servicemanual
lp 47 -p571.
Whenrepairing
theKCtype.
olease
seethea-
dditional
service
manual
(ART-519).
CONTENTS
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1.SPECIFICATIONS
2, FRONT PANELFACILITIES
3. BLOCKDIAGBAM
4. CIRCUITDESCRIPTIONS
4.1 FM Tuner
4.2 AMTuner
4.3 Display
Circuit
4.4 EqualizerAmplifier
4.5 ToneControl
Amplifier
4.6 Power
Amplif
ier
. . .
4.7 Power
Indicator
Circuit
4.8 Protection
Circuit
DISASSEMBLY....
PARTS
LOCATION
DIALCORD
STRINGING
ADJUSTMENTS
8,1 FM
Tuner
8.2 AMTuner 22
8.3 PowerAmplifier... 23
8.4 FL Indicator
Circuit 24
9. EXPLODED
VIEW 25
10.
SCHEMATIC
DIAGRAM,
P.C.
EOARD
CONNECTION
DIAGRAM
ANDPARTS
LIST
10.1 Schematic
Diagram 3l
10.2 P.C.
Board
Connection
Diagram 35
10.3PartsList ...,...41
11.PACK|NG.... 46
ADDITIONAL
SERVICE
MANUAL
I.SPEC|F|CAT|ONS .....47
2. CONTRAST
OFMISCELLANEOUS
PARTS
. . . . 48
3. SCHEMATIC
DIAGRAM,
P.C.
BOARD
PATTERNS
ANDPARTS
LIST
3.1 SchematicDiagram 49
3.2 SwitchAssembly
{AWS.148) 57
5.
1
8.
3
5
7
I
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12
12
12
14
14
16
17
19
20
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

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1.
SPECTFTCATIONS
Power
AmplifierSection
Continuous
Power
0utputof60watts*
per
chan-
nel,
min.,
atSohmsfrom
20Hertzto20,000
Hertz
with
n0m0rethan0.005%total
harmo'
nicdistortion,
Total
Harmonic
Distortion
(20
Hertzto 20,000
Hertz,
I ohms)
continuous
rated
power
output . . Nomorethan
0.005%
30
watts
per
channel
power
outputNomorethan0.005%
Intermodulation
Distortion
(50
Hertz:7,000Hertz
=
4 : 1)
continuous
rated
power
output Nomorethan 0.0057o
30
watts
per
channel
power
outputNomore
than0,005%
Frequency
Response
. . . . . 5 Hertz to 200,000
Hertz
l! OA
lnput
Sensitivity/lmpedance
(POWER
AMP
lN)
or,rri 1v/50
kilohms
Speaker A,B,A+B
"-: ::::"::'': 1*:": 1o
i* He*z'
8
0hms)
Hum and
Noise
(lHF, short-circuited,
A network)
115d8
Preamplifier Section
Input
(Sensitivity/l
mpedance)
PHONO 2.5mV/50
kilohms
AUX,TAPE
PLAY
1,2 . . .. . . . 150mVl50kilohms
Phono
Overload
Level
{T.H.D.0.005%,
1,000
Hertz)
PHONO .. .. . 250mV
Output
(
Level/l
mpedance)
TAPERECI,2
.. ..,. 150mV
PREAMP
OUT
(Rr_:
50
kilohms)
-....1V/l kilohms
{Volume:
max.}
Total
HarmonicDistortion
(20
Hertz
to 20,000
Hertz)
ToneControl
BASS. tSdB
(100H2)
TREBLE ..... r',l0dB(10,000H2)
Subsonic
Filter
. 15Hz
(-6dB/oct.)
Loudness
Contour
(Volume
controlsetat *40d8 position)
. . . . +6dB
(100H2),+3dB
(10,000H2)
Hum
and
Noise
(lHF,
short-circuited,
A network)
PHONO. .....82d8
AUX,TAPEPLAY
1,2..,. .
.
. 11OdB
Attenuator. ....-20d8
FM
TunerSection
PHONO
(REC
OUT)
AUX,TAPE
PLAY
1,2. .. .
.
.
Frequency
Besponse
PHONO
(RIAA
Equalization)
or", iori ,ro" i
,';'o^u"' to20'000
Hertz
t0'2dB
UsableSensitivity
(lH
F
)
50dB
OuietingSensitivity
MONO
STEREO
Signal-to-Noise
Ratio
MONO
STEREO
Distortion
(at
65dBf)
MONO l00Hz.
lkHz.
6kHz .
STEREOIOOHz.
lkHz .
6kHz -
Capture
Ratio.,
Alternate
Channel
Selectivity
400kHz ..,..,7ft8
StereoSeparation
1kHz. ......45d8
30H2to15kH2. ...... 35dB
Frequency
Response ....2}Hzto15kHz1!loe
SpuriousResponse
Ratio, . . . . . . 65dB
lmageResponseRatio ... 65dB
lFResponseRatio.. .... 90dB
AMSuppressionRatio ... 55dB
SubcarrierProduct
Ratio. . . . . . . 50dB
SCARejectionRatio .... 64dB
MutingThteshold 19.2dBf
(5pV)
Antenna
lnput . 300ohmsbalanced,
75
ohmsunbalanced.
10.3dBf
{1.8itv)
16.2dBf
(3.6sV)
37dBf
(39pV)
83dB
(at
65dBf)
78dB
(at
80dBf,
0.1o/o
a.a7%
0.15%
O.2Yo
0.15%
0.25%
r.odB
No more than0.005%
{10V
output}
Nomorethan
0.005%
(10V
output)
7Hz
to
8o,0oo
Hertz
]f aa
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

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AM Tuner Section
Sensitivity
(lHF,
Ferrite
antenna).
. 300pV/m
{lHF,
Ext.antenna}
. . . 15pV
Selectivity .....30d8
Signal-to-NoiseBatio .... 50dB
lmageResponseRatio ... 40dB
lFResponseRatio.. .... 40dB
Antenna .... Ferritelooostickantenna
Audio Section
Output
(
Level/l
mpedance)
FM(100%Mod.). ..... 650mVl1 kilohms
AM(3O%Mod.)
. ..... 200mV/1kilohms
Semiconductors
fCs... .......17
FETs. .......6
Transistors ...,.71
Diodes .......58
Miscellaneous
PowerRequirements .... ACi20V,60Hz
PowerConsumption. ... 200W(ULl
Dimensions ....506{W}
x164{H)x
434{D}mm
19-15116(W)
x6-7/16
(H)
x 17-1116(D)
in
Weight
(withoutpackage) 16.2k9
(351b
12oz)
Furnished
Parts
Operatinginstructions
. . . . . . . . . 1
FMT-typeantenna ..... I
* Measured Dursuant to the Federal Trade Commission's Tnde
Regulation rule on Power Output Claims for Amplif iers,
NATE:
Specifications and the design subject to poisible modifications
without notice due to improvements.
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

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2.
TRONT
PANEL
FACILITIES
c POWER
SWTTCH
Setthisswitch
to ONto supply power
to thereceiver.
There
will be
a short
delay
when
it is
set
to ON,
because
the muting
circuit hasbeen
actuated
to suppress
the
unpleasant
noise
that issometimesgenerated
when
the
power
is
switched
on
and
off
.
O spERrER
swtrcHEs
Depress
the switch
corresponding
to the speakers
con-
nected
to the
SPEAKERS
terminals
(AorB)
ontherear
panel.
You candepress
both of these
buttons
to listen
to the
sound
from two pairs
of speaker
rystems
at the same
time.
@ gnlcHrNEss sELEcroR
Use
this switch
to select
the brightness
of the power
meter
and
the
frequency
displav.
BRIGHT: When
using
thereceiver
indaylight
orother
DIM: brightlocations.
At night
or in
dark
locations
when
the
exist-
ing
brightness
is
toohigh.
CI POWER
METER
This
meter
allows
you to read
out therated power
level
on the fluorescent
display
tubewhen
speakers
with a
nominalimpedance
of g ohms are connected
to the
speaker
terminals.
@ orel PoINTER
This
pointer
indicates
the
broadcasting
stations.
@ bunnrz
LocKED
tNDtcAToR
This
indicator
lights
upafter
theoptimum
tuning
point
has
been
obtained
anddisplays
that
thereceiving
stateis
stabilized
bythe
built-in
quartz
lock
circuit.
O TTU
STEREO
INDICATOR
This indicator
lights
up when receiving
an FM stereo
program
if theFM
muting
off switch
is
released.
,o SIGNAL
INDICATOR
Thisindicator
lights
in sequence
from left
through
right
during
thetuning
of anAM or FM broadcast
in
accord-
ancewith the strength
of the signals
being
received.
The optimum tuning point is where
the maximum
number
of indicators
light.
@
rururruc
tNDtcAToR
When
tuningin an FM station,
theoptimum
reception
point is indicated
when
the center
indicator
lights
up.
When
the left indicator
has
come
on.rotate
thetuning
knob
slightly
clockwise.
When
theright
indicator
comes
on,
rotate
theknob
slightly
counterclockwise-
@ rnEouENCY DTSPLAY
Thisindicates
thefrequency
which
is
tuned.
With FM reception,
theletters
,,FM.,
appear
on the
left
of thedisplay
and
',MHz,'
onthe
right.
With
AM recep.
tion,
"AM" appears
onthe
left
and
,,kHz..
on
theright.
These
change
when the function selector
position
is
changed.
0 rururruc
KNOB
Use
thisknob
to tune
into broadcasting
stations.
c} FM
MUTTNG
OFF
SWTTCH
When
this
switch
isreleased
and
an
FMbroadcast
tuned
in,
themuting
circuit
is
activated
inside
to suppress
the
annoying
interstation
noise
between
the broadcasting
frequencies
for noise-free
reception.
When
thebroadcast-
ingstation
isfar away
or when
receiving
a station
in a
fringe
area,
setthe
switch
to theOFF
position
and
then
tune in. lf there
is
a broadcasting
station
with a strong
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com