Pioneer SX-3800 User Manual

Sefvice

FM

Ouartz

STEREO

Locked

RECEIVER

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MODEL

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This
see
dditional

SX.38OO COMES

Type

KU 120V only

s/G 1

s 1 10V,

KC

service manual is applicable

the additional

service

10V, 120V,

l20V only

service manual

manual

CONTENTS

1. SPECIFICATIONS
FRONT

2,

3. BLOCK DIAGBAM

4.

CIRCUIT DESCRIPTIONS

4.1

4.2 AM Tuner

4.3

4.4

4.5

4.6

4.7

4.8 Protection

DISASSEMBLY....

5.
PARTS

1

DIAL CORD
ADJUSTMENTS

8.
8,1

PANEL FACILITIES

FM

Tuner

Display

EqualizerAmplifier
Tone Control
Power
Power

FM

Circuit

Amplif

Indicator

Circuit

LOCATION

STRINGING

Tuner

Amplifier
ier

IN

22QV,

12OV,

22OY

(ART-519).

. . .

Circuit

FOUR

Volt4e

and

240V

and

24OV

,

to the

lp

VERSIONS

(Switchable)

(Switchabte)

47

DISTINGUISHED

KU type.

-p571.

When repairing

3
5
7

I

o
o

12
12
12
14
14
16
17
19

20

FOLLOWS:

AS

U.S.A. model

U.S. Militarv

General

Canada

When

repairing

8.2

8.3

8.4
EXPLODED

9.

10.

SCHEMATIC
CONNECTION

10. 1

10.2 P.C.

10.3 PartsList

11. PACK|NG....

ADDITIONAL

I.SPEC|F|CAT|ONS

2. CONTRAST

3.

SCHEMATIC

PATTERNS

3. 1

3.2

model

exDort model

model

the

S/G and

the

KC type.

AM Tuner
PowerAmplifier...
FL

Indicator

VIEW

DIAGRAM,

DIAGRAM

Schematic

Board

SE RV ICE

OF MISCELLANEOUS

DIAGRAM,

AND PARTS
Schematic Diagram
Switch Assembly

Remarks

S

olease

Circuit

P.C.

AND PARTS

Diagram

Connection

MANUAL

P.C.

LIST

{AWS.148) 57

please

Wpe,

see the a-

EOARD

Diagram

PARTS

BOARD

LIST

...,...41

.....47

. . . . 48

22
23
24

25

3l
35

46

49

;

t

H

H
H

n

I
H
H
H
H

T

H
H
I

i

t

I

I

e

+

I
I

1.

SPECTFTCATIONS

t

r

t

t

t

t

I
t

t
T

t
t

t
t

Power

Continuous
nel,

Ampl if ier Section

min.,

Hertz

with

Power

at Sohms from

n0 m0re than 0.005% total

nic distortion,

Harmonic

Total

ohms)

I

continuous

watts

30

Intermodulation

continuous

watts

30

Frequency

lnput

Sensitivity/lmpedance

or,rri

Speaker

Distortion

power

rated

per

channel

Distortion

power

rated

per

channel

Response

. . . . .

"-:

:: ::"::'':

Hum

Preamplifier Section
I nput

PHONO
AUX,TAPE

Phono

PHONO

Output

TAPERECI,2

PREAMP

Total

PHONO

AUX,TAPE

Frequency

PHONO

or", iori

Noise

and

(Sensitivity/l

Overload

(

Level/l

OUT

Harmonic Distortion

(REC

Besponse

(RIAA

1*:":

(lHF,

mpedance)

PLAY

1,2 . .

Level

mpedance)

.. ..,.

(Rr_:

-....1V/l

OUT)

PLAY

1,2 . . . . . .

Equalization)

,ro"

i

0utput of 60watts*

per

20Hertz to 20,000

(20

output . .

power

(50

output

power

5 Hertz

Hertz to 20,000

No

output

No more than 0.005%

Hertz : 7,000 Hertz = 4 : 1)

No more than

output

No

to

200,000

(POWER

AMP

1v/50

A,

Hertz,

more than

more

than 0,005%

Hertz
lN)
kilohms

B, A+B

He*z' 8 0hms)

i*

1o

short-circuited,

..

{T.H.D.0.005%,

.. .. . 250mV

kilohms)

50

(20

,';'o^u"'

A network)

115d8

2.5mV/50
150mVl50kilohms

. . .

Hertz)

1,000

150mV

kilohms

Hertz

7Hz

{Volume:

to 20,000

more

No

output}

{10V
No more than
(10V

output)

to 20'000

to

Hertz

8o,0oo

kilohms

Hertz)

than 0.005%

Hertz

chan-

harmo'

0.005%

0.0057o

OA

l!

max.}

0.005%

t0'2dB

aa

]f

Tone Control

BASS .

TREBLE .....

Filter

Contour

Noise

(at

65dBf)

lkHz.

6kHz .

lkHz

6kHz

Ratio. ,

Channel

Response

lnput

.

(Volume

. .

(lHF,

1,2 ..,. . . .

(lH

Ratio

.

-

Selectivity

Ratio, . . . . . . 65dB

Ratio . . . . . . .

.

control set at

+6dB

. .

short-circuited,

F

)

..,..,7ft8

......45d8

...... 35dB

....2}Hzto15kHz1!loe

Subsonic

Loudness

and

Hum

PHONO. .....82d8

AUX,TAPEPLAY

Attenuator.

FM

Tuner Section

Usable Sensitivity

Ouieting Sensitivity

50dB

MONO
STEREO

Signal-to-Noise

MONO
STEREO

Distortion

MONO l00Hz.

STEREO IOOHz.

Capture
Alternate

400kHz

Stereo Separation

1kHz.
30H2to15kH2.

Frequency

SpuriousResponse
lmageResponseRatio
lFResponseRatio..
AMSuppressionRatio
SubcarrierProduct
SCARejectionRatio
Muting Thteshold
Antenna

tSdB
r',l0dB(10,000H2)

15Hz

(100H2),+3dB

A

11OdB

....-20d8

10.3dBf

16.2dBf

37dBf

83dB

78dB

0.1o/o
a.a7%

0.15%
O.2Yo

0.15%

0.25%

r.odB

... 65dB

.... 90dB

... 55dB

50dB

64dB

....

19.2dBf
300 ohms balanced,
75

(100H2)

(-6dB/oct.)

*40d8

position)

(10,000H2)

network)

{1.8itv)
(3.6sV)

(39pV)

(at

65dBf)

(at

80dBf,

(5pV)

ohms unbalanced.

I

t

I

Eix-3El00

I

AM Tuner
Sensitivity

Selectivity .....30d8

Signal-to-NoiseBatio .... 50dB

lmageResponseRatio
lFResponseRatio..
Antenna

Audio Section
Output

FM(100%Mod.).
AM(3O%Mod.)

Semiconductors

fCs...

FETs.
Transistors

Diodes .......58

Miscellaneous

PowerRequirements

PowerConsumption .

Dimensions

Weight

Section

(lHF,

Ferrite

antenna).

Ext.antenna}

{lHF,

(

(without package)

mpedance)

Level/l

. .....

.......17

.......6

. 300pV/m

. . . 15pV

40dB

...

40dB

....

.... Ferritelooostickantenna

..... 650mVl1

200mV/1kilohms

...,.71

.... ACi20V,60Hz

...

200W(ULl

....506{W}

434{D}mm

19-15116(W)

(H)

x

16.2k9

kilohms

x164{H) x

x6-7/16

17-1116(D)

(351b

in

12oz)

t

r|
r|

t

t
t

;

t

Furnished

Operatinginstructions . . . .

FMT-typeantenna .....

*

Measured Dursuant to
Regulation

NATE:
Specifications
without

Parts

rule

Power

on

and the design subject

notice due to

improvements.

. . . . .

Federal Trade

the

Output Claims

1
I

Commission's

for

Amplif iers,

poisible

to

Tnde

modifications

t
t

t
rl

t
rl

t

il

+

t

T

t
t

r

I

t

2.

TRONT

PANEL

FACILITIES

t

r

t

I
T

r

T

t

POWER

c

Set this
There
the
unpleasant
power

O

Depress
nected

panel.
You
sound
time.

gnlcHrNEss

@

Use
meter
BRIGHT:

DIM:

POWER

CI

This
on
nominal
speaker

orel

@

This

bunnrz

@

This
has
stabilized

switch

will

muting

is

switched

spERrER

the

to the

can depress

from

this

switch

and

the

meter

fluorescent

the

impedance

terminals.

PoINTER

pointer

indicator

been

obtained

by the

SWTTCH

to

ON

to supply

be

a short

circuit

noise

has

that

on

delay

been

is

sometimes generated

and

off

swtrcHEs

switch

corresponding

SPEAKERS

both
pairs

two

terminals

of

these

of

speaker

sELEcroR

to

select

the

frequency

When

bright locations.

At

night

ing

brightness

METER

allows

indicates

LocKED

lights

built-in

displav.

using

the receiver

or in

dark

is

you

to read

display

g

of

ohms

the

broadcasting

tNDtcAToR

up

after

and displays

quartz

power

when

it

actuated

.

to

buttons

rystems

brightness

locations

too high.

out

the rated

tube

when

are

the

optimum

that

the receiving

lock

circuit.

to the

is

set

to ON,

to

suppress

the

speakers

(A

or B)

to listen

at

of the

in

daylight

when

power

speakers

connected

stations.

tuning

receiver.

because

the

when

the

con-

on the rear

to

the

the

same

power

or other

the

exist-

level

with

a

to the

point

state is

TTU

O

,o

@

@

0

c}

tune

STEREO

This

indicator

program

if

SIGNAL

This indicator
during

the

ance

with

The

optimum

number

of indicators

rururruc

When

tuning

point

is indicated

When

the left

knob

slightly

rotate

on,

rnEouENCY

This indicates
With

FM

reception,

of

the display

"AM"

tion,

These

change

changed.

rururruc

Use

this knob

FM

MUTTNG

When

this

in,

the muting
annoying
frequencies
ing

station

fringe

area,

in.

lf

INDICATOR

lights

up

the FM

muting

INDICATOR

lights

in

sequence

tuning

of

an AM

the

strength
tuning

point

light.

tNDtcAToR

in

an FM

indicator

clockwise.

the knob

station,

when

When

slightly

DTSPLAY

the frequency

the

letters

',MHz,'

and

appears

when

on

the

the

KNOB

to

tune

in

to

OFF

SWTTCH

switch

is released

circuit

is

activated

interstation

for

noise-free

is far

set the

there

noise

away

or when

switch

is

broadcasting

a

when

receiving

off

switch

is

released.

from

left

FM

or

broadcast

of

the

signals

is

where

the

optimum

the

center

indicator

has

come

on. rotate

the right

counterclockwise-

which

,,FM.,

on the

left

and

function

broadcasting

and

an

between

reception.

receiving

to

the OFF

indicator

is

tuned.

appear

right.

With

,,kHz..

selector

stations.

FM

broadcast

inside

to

the broadcasting

When

position

station

an FM

through

being

the

the broadcast-

a station

with

stereo

right

in

accord-

received.

maximum

reception

lights

the tuning

comes

on the

left

AM recep.

on

the right.

position

tuned

suppress

and

a

strong

the

in a

then

up.

is

r--

level

signal
you

satisfactorilv

by the
MUTING
tune in. The muting circuit
tuner is receiving AM broadcasts. lf
performed
depressed and a
circuit
indicator

FUNCTTON

{"}

Depress the function
program

before selecting a
sound
FM:
AMr
AUX: Depress

PHONO:

NATE:

Only one

volunnE coNTRoL

@

Use
speakers and
the output

"o."

(}

MUTING

Set this switch to the
audio
volume control if
the

audio output

records

on the

want to receive.

stronger signals.

OFF switch

after the

is

set to

does

air next to a station whose

you

may not be

because the sound will be drowned

ln

cases like this,

to

OFF

does not work when

FM MUTING

station selected, the

mode

not

the OFF

light.

SELECTOR

switch

which corresponds

source. Turn the volume

different function

from

this control to adjust the output level to the

program

one
Depress this
Depress

audio component connected
jacks.

Depress this switch when
on the

jacks.

function

headphones. Turn

level . No

source is

switch

this switch for AM

this switch when

turntable connected

swirch should be deplessed

sound will be heard if

SWITCH

*20d8

output by 20d8.

or tapes.

There

you

this switch when turning down

temporarily and

LOUDNESS SWITCH

When listening to a

down, depress this

control

and treble
When the volume
hear
The loudness
this
treble come through
takes

turned down,

@

Use
right channels.

turned

will be accentuated.

bass

the

deficiency. By depressing this switch, the bass and

on

gRl-Rr\cE

this control to balance the

and treble than when the

switch

punch

a

coNTRoL

First, however, set

performance

is low,

even when the volume control is

human ear

the

is

designed

thus

much

more strongly and the sound

program

able to tune

set the

{depressed

OFF switch has

being

for FM

it

clockwise to

position

is no need to adjust

volume

position)

tuning has been

quartz

and the

control down first

switch

reproduced.
broadcasts.
broadcasts.

listening

playing

to the

at a time.

to attenuate

when

changing over

with the volume

switch

finds

volume is

compensate

to

of

mode switch

the

locked

LOCKED

to the

while

to an

to

the AUX

a record

PHONO

increase

you

set it to

and the bass

harder

it

left

the

in
out
FM

and

the

been

the

the
the

to

high.

for

and

to

MONO. lf
means that
Turn the balance control to the
versely. if
means that
Therefore, turn
adjust. After adjusting. return the mode switch to

the sound appears

the volume

the sound appears

volume of

the

the balance control to the

to

of the

to

the

be louder on the right, it

right

channel

left

and adjust. Con-

louder

be

left

channel

is

on the

is
right

STEREO.

TAPE MONTTOR

@)

Employ for
progress.

1: Playback

the TAPE
Playback

2:,

the

NOTES:

l. 8e

when
When

2.
operate
signat to the T,APE

MODE

G}

Use

this
ances.
STEREO:

MONO:

LOW FILTER

AD

When
can

means that
frequencies
from
Although

intermodulation

BASS

@

When

response in the bass

boosted.

reSponse.

At

the OFF

frequency response is flat.

and

HEADPHONE

€}

Plug
listen
Release
the sound

tape

or monitoring

'l

or

TAPE

2

sure to set the switches

playing

recording

the

tape

SWITCH

switch

Set to this
When set to this
channel
duced

systems.

this switch is

provided

be

you

which

a turntable and other

this

AND

turned clockwise

Turning

position

headphones into this

the

both

through

your

speaker

through

SWTTCHES

playback

jacks.

monitoring of a tape deck

iacks.

records

with tvvo tape decks

monitor

for

monophonically

or

to monitor a

of a tape deck

to

upper

or listening to broadcasts.

2 deck.

selecting

position

signals will

the

simultaneausly. do nat

I switch as this will interrupt

mono or stereo

for

normal

position,

the left

be mixed and repro-

from

recording

connected

connected to

IOFF)

perform.

operations.

and

both

SWITCH

'l

to

set

{or f requencies

can cancel out

is

noise

distortion and damage the speakers.

TREBLE

SHz, a 6dB/oct attenuation

15H2.

the ultra-low

distortion.

of

it can

generated

cannot be

below

noise in

low-pitched

by

forms

heard,

CONTROLS

from

the OFF

and treble

counterclockwise attenuates the

tone control circuit is bypassed

the

range,

position,

respectively,

JACK

jack

stereo headphones.

you

switches

your

headphones only.

if

when

want to

you

listen

higher.

left,

it

higher.

and

in

to

position

the

right

speaker

This

rumble

generate

the

is

want

to

to

H

H

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4.

CIRCUIT

FM

4.1
Front

ganged

equipped L-stage

Clapp circuit local oscillator.

voltage

(variable
system
operation,
diode.

lF Amplifier

filten. The

stitutes
limiting limiter. The IC
stage,an

(PA3001-A),
quadrature
cuits.

ratio, delay characteristics, and other
shows a
the

Multiplex Decoder

(PA4006-A)
functions in
functions of the more

(PA1-001-A)
further

MPX

(see

either
eliminating

distortion.
tures

TUNER

End

FM front

The

tuning capacitor, a dual-gate

controled

capacitance diode).

(refer

These employ 3

a single-stage differential

Performance

PA3001-4.

The recently developed multiplex decoder

Distortion

improved by incorporating a

decoder. The chopper

Fig.

to

DC

to

a constant voltage is applied to the

and Detector

(HA1201)

IC

improvement on

includes an

detector,

marked improvement in comparison to

combines

a single

and

ratings and

4-1)

operates

ground

generation

the

Furthermore,

direct-coupled switching

FRONT ENO

FM

DESCRIPTIONS

end of
RF
oscillator employing a

"Quartz-lock

ICs

in terms of distortion, S/N

AF MUTING IC

to the through circuit, thereby

or

SX-3800 includes

MOS FET-

amplifier, and

This

When the

system") is not in

and 3 dual-element ceramic

of the

(PA3007-A)

the former IF

IF limiter

meter drive, and other cir-

MPX

decoding with muting

IC,

thereby handling the

conventional MPX IC

SIN ratio have been

type switching circuit

by switching the signal

of unwanted

since the

a modified

oscillator

quartz-lock

first

2 stage con-

amplifier current-

in the third

system

amplifier,

parameters,

(PA1002-A).

chopper type

PA4006-A fea-

with the detec-

a 3

is a

vari-cap

IC

IC

noise or

tor, there is no
low frequency end.

Besides the
PA4006-A
ler,

stereo

amplifier,

Composite

and

deterioration

decoder and
incorporates

also
auto selector,

MUT

control

signal

muting

the

VCO killer circuit,

circuit.

dhllL'

InOut

JU1IIIUIJIJUUI

Switchins

Fig.4-1 Chopper type switching

ouartz-Lock

quartz-lock

The
stereo receiver
employing a crystal

the intermediate
voltage by the discriminator
crystal resonator),

frequency being

locked.

control

remain tuned securely

IF
applied
consists of
resonance
tor. The resonance
frequency
at this
being reduced
quency

This extremely stable

system thus

When the

system

to crystal detector

time

increases, the

,is".rc-1q/

system

system

is a frequency servocontrol

resonator.

frequency

resulting

corrected and subsequently

IF

signal

(PA300?-A),

IC

diodes connected

circuit

(10.?MHz),

will be minimal,

equipped

frequency is the same

minimum

to a

.^ I

thL

featured

(iF)

in the

ensures that

for as long as

appears

(see

in

with

which

reactance

means

resulting

level.

in separation

pilot

signal

­|

circuit

in the SX-3800

Any displacement

is detected

(equipped

local oscillator

frequency servo-

tuned frequencies

required.

pin

at

it is amplified

Fig.

parallel

a crystal resona-

the

If
the capacitance

of

at the

circuits,

no.l? of the

4'2)

impedance
in the output
the input

the

cancel-

ivluT

Output

system

DC

as a

with a

and

which

in a series

as the

fre-

in

IF

t
t

H

t

H

H

T

;

;

;

I

H

;

E}

T

T

Fig.4-2

OC AMP

WITH LIMIiER

clRcull

quartz-lock

FM

LPF

sYstem

CRYSTAL

1

r

DTTECIOR

H
I

I

t

rl

T

t

r

t

I

t

I

r

t

I

t
t

rl

l

t

I

(C)

stage
ductance
detection

of tlie
stage reactance
increased,
leaves
stage
of detuning
creased,
detector
teristics, FM
IF

signal

to modulation

axis, And
resonance
will
in

the central
respect
resulting
DC voltage
LPF2
which
in

tlre iocal

oscillator frequency

constant

a

Since
tor is
quencies

r

Limiting

If
overiap
cies
A

DC

(limiter
restricts
tance

A
system

level
quency
This

gate

the
ing

in

Iock

is reduced,

stage

by D2

IF

signal.

resulting

the negative

and C

resulting

output. By

is

if

frequency,

be zero. If,

to the

in

(AC
is

applied

tuned

the

regulated

of

quartz-lock

lhe

with

and

result
amplifier
action

the voltage

diode,

DC

voltage

IC

drops

has been

DC voltage (FM

of

the FET

circuit

(L)

which

If

the input frequency

is

decreased

stage

reactances

in

the respective

in

detection

FIvI

an

will

the

central frequency

however,

frequency,

detector

generation

the

passed

is

filter)

to the variable

oscillator,

frequency).

central frequency

by

extremely

the

Locking

strong

in

considerable
is

by

NFB

thereby limiting

appea$

(PA3007-A)

below

detuned

(fET)

Q2

being

being

turned off.

and

the

reactance

increased,

leaves

in AiVl

portion

a

subsequent

thus

attaining

becomes

signal

be symmetrical

to form

the

adjacent

applied

5pV,

frequency

the detector

there

will

through LPF1

thereby

to

obtain

crystal

high

stability

Range

range

therelore

circuit

at

when

or when

by

muting

via

a Schmitt

turned

resulting

the

and

C stage

detection

of the IF

increase

directions

possible.

is

any

frequency

become

of a DC

a correction

capacitance

a constant

of the

resonator,

is

too

broadcasting

tuning

used

zener

to

the variable

quartz-lock

the

pin

no.L3

the

more

signal)

on, and

of the

in

positive

increase
S-curve

about

is

output

asymmetrical,

(IF

correcting

are

diodes)

antenna

the

than

circuit,

portion

decreases,

reactance

by

D1

which

signal. The

as the

deviation

displacement

voltage.

crystal

wide,

as

is

deglee

is in-

in

charac-

Since

a

central

equal to

DC

level

deviation

This

filter)

voltage

diode

tF

detec-

tuned

obtained.

it

frequen-

difficulties.

a limiter

which

capaci-

range.

of

the IF

input

tuned

r100kHz.

applied

result-

quartz-

the

in-

AM

L

L

the

the

due

the

in

and

the

(i.e.

fre-

will

fre-

to

4.2

AM

TUNER

The

AM
tuning
tains
amplifier,

panel
decoder

minal

(

4,3

Frequency

played
(FL
(a
0 to
which

tion
a buffer

(M54451P)
sion
rFRlied
This

?-segment
on

given
FL
nected
signals

pendent
being
Each

capacitor

a l-stage

The

AM

for

is

adaptor.

is

the converter

emitterf

Frequencies

-

The

An

osc.sr6NAL

ollower)

DISPLAY

in

digital

tube). Each

(see

e)

(with

9

employs

signal

is

the local

(1/8

to

IC

is

according

outline

in

block

tube

a

in

(see

grid

lit

up in

digit

LOCAL

AM

FM LOCAL
OSC.SIGNAL

tuner

detector,

connecting

Display

Fig.

section

plus

an

RF

amplifier,

and AGC

STEREO

CIRCUIT

received

form

the exception

only

OUT

to an

The

signal

output

stage.

by

digit employs

4-3)

to

2 segments

fi'

Fig.4-3

source

amplifier (FET)

where

for

the

responsible

S-digit

to time-shared

-

g

parallel,

Fig.

is

lit

7-segment

during

oscillator.

it

is

subjected

AM

and

frequency

for

display

of

the

composition

diagram

segments

the

D1

4-6)

apptied

for

each

succession

up for

(M5445rP)

rc

lms

L/80

form

(anode)

digit)

sx-gaoo

consists

(HA119Z)

IC

converter,

circuit.

terminal

AM

stereo

appearing

passed

by

the SX-9800

fluorescent

up

display

o

the

(each

-

from

all

of the left

b and

digit

display

both AM

The

signal

to

the
to frequency

for FM)

counter

dynamic

digit

sequential

in Fig.

for

Db

time

to

each

result

the left

during

each

of

a 2-ganged

which

on

via a

indicator

to ?

numerals

c).

and

is

prescalar

before

IC

drive

being

scanning).

pDb009

of

4-b.

each

division pulse

grid

in

hand

con-

2-stage

the rear

broadcast

at this

buffer

are

tube

segments

from

hand

digit

FM

recep-

passed

divi-

being

(pDb0Og).

of

turned

With

digit

con-

(inde-

the

digik

side.

bms

inter-

IF

ter-

dis-

via

IC

the

is

the

I

T

t

FM"aM sELgcrroN

Fig.

4-4

S IGNAL

Frequency

display

FL TUBE

block

a

diagram

a

OIGIT

ORIVER

SEGM€NT

MU

DRIVER

PLE

!TI

XER

I

GND

Fig.4-5

val. Pin
terminal. The
8009s
L
tube brightness
period).
tube
ness

basic signai
division
control signal.

designating
modes employed in the
designated by
levels
mode are

IF
during
characteristics.

system
the
decimal
appear

the TUNING and SIGNAL indicators.

though the segments

are

cuits, the

division

no.? of

for

level

signals, thereby varying

Note

is driven by static drive,

may

be

The

5.12MHz crystal
pulse

Terminals S1 - S4

(H

and

required

ceramic filter stage, 53

FM

Although

is

capable of

FM

band, the L0kHz digit

place)

only as 5 or 0.

The frequency display

static driven by the corresponding drive

pulse

PD5009

time division

H level

varied

used

mode according to the ceramic filter

edd

input

(by

that

by

in the

signal and

reception mode.

varying

L).

The

in

the SX-3800

in

the

is

driven

timing,

is the

brightness

pulse

signals, and to

the degree

varying

since the

changing the

(pin

3 different

coping

locking

FM

(anode)

thereby

the

segment lighting

pov.er

the degree

oscillator

preparation

counter

the

-

nos.3

The

SX-3800

the combination

FL

according to the D3

(see

with IF

54

and

FM

stage

any frequency within

(digit

frequency

tube also incorporates

for these indicators

placing

width is

indicator

grid

voltage.

generates

of

gate

6) are used in
2 reception

Table

IFs

during
offset
being

quartz-lock

in the second

display will

the segments

Block diagram

selector

to

set

200ps

for
FL

of

FL

bright-

of

the

the

time

circuit

1) are

of input

FM

in the
preset

And

cir-

time

al-

PRESETAEL€

OECIMAL COUNTER

22-8lI r

PD5009

of

Inl

lttr-

o,w

ooM

*l-w

,,iw

-'l'*i*iill

t{--

under

indicators
according to the
MHz

MODE

AM L

+

tm3

Fig.4-6

dynamic drive.

indicators are

FM

D1-D5

in

the

s1

H L L 1073

H

H L

5-DIGIT

16

ROM

8C= L

time division

In

addition, the

frequency display

Db

timing,

lit

accordine to

S2

H H

s3

L H

pulse

while the kHz and

the D1 timine.

I

H

L

H

H

L

(DlM)

signals

AM

and

section

lF

{MHz)

10.70
't

0.67

450kHz

FIW

are lit

Table

I
I

I
I
I
I

t

I

r|

il

1

i

t

t

10

t

r

sx-g€too

r

t

T

l|

t
t

ll

t
t

f
f

I
I

t
t

t
t

SIGNAL

The

FL

drive
(PA300?-A)

amplified

(HA12010).

IC
comparators
power
to

drive

TUNING

The
tuning
casting
2

detuning
direction
from.
in Fig.

The

station

center
and
feren^tial
and
appearing

{PA3007-A) and
(Q17

more

The
scribes
particular

pin

no.2

lndicator

SX-3800

tube

5-point

signal

and

indicator

the

lndicator

TUNING

indicator

station

direction

in

The

corresponding

4-B

below.

TUNING

has

been

frequency.

turned

Q21

amplifier

being

Q24

at

&

Q1B)

t100kHz.

than

DC

voltage

an

S

curve

broadcasting

serving

obtained

and AIVI

similar

SIGNAL

which

turned

pin
rvhen

Circuit

SIGNAL

indicator

from

tuner

then

applied

This

IC

to

circuit,

indicator.

Circuit

indicator

(which

frequency

indicators

the

station

indicator

tuned

This

is

(resulting

off

le19

on)

no.lB

passed

the

pin

on

when

tuning

frequency,

as

the

Fig.

4-7

indicator

display.

the FM

IC

to

contains

those

b

of

these

consists

lights

properly

is

has

drive

is

to within t100kHz

because

&

e20J

by

the FM

of

the

via

the

station

no.4

reference

consists

The

IF

(HA119?)

the

indicator

pairs

12

employed

pairs

of

up

when

which

been

circuits

activated

in

of

to

are

is

e16
the

detector

being

muting

IF

Schmitt

is

tuned

pAB007_A

and

away

the

level.

signal

system

of voltage

being

tuned)

indicate

tuned

turned

tumed

system

voltage

This

SIGNAL

of

meter

is

first

drive

in

the

used

a center

a broad-

and

the

awav

outlinei

once

the

of

the

on

dif_

off

signal

IC

circuit

away

by

de-

from

on

DC

indicator

an
IC

a

drive

SCHMITT
CIRCUII

(PA30(r/-A

rc

voltage
(Q19

&

tor

switch

When

quency

to

a

higher

be

higher
voltage
voltage
and

the

ing

direction

circuit

)

Fig.

4-8

is

amplified

and

Q20)

circuit

tuning

(or

side

frequency),

than

will

thus

raised,

higher

indicator

TUNING

by

then

(eZZ

&

to

a frequency

tuning

the voltage

that

resulting

frequency

on

be

lowered

pin

also

indicator

the

applied

e2g).

away

in

drive.circuit

differential

to

from

from

no.2.

The

and

e2B

(right

being

polarity

a

the

the

pin

on

e20

the

e1.g

being

hand

turned

amplifier

high

frequency

no.4

collector

collector

tumed

side)

detun-

on.

When.

detec_

fre_

will

on,

I

t

on the
approached from
tuning
voltage
on to light up
detuning

Q23
resulting

off,
will not be lit up,

properly,
equal. Consequently,
turned
ing
since
base voltage,
tuning
charged
on, thereby
cator

4.4 EOUALIZER

with
(HA1201?P).

and

performance
a
dynamic
of 250mV
82dB
within

other hand, the broadcasting

the

to a lower frequency)

away
will be lower,

lower

the

direction indicator. When

is

on, the

in

which means

Once

the broadcasting

the voltages

off, which

direction

is

Q24

indicator

up via

LED.

?his

circuit

newly

This IC is

provide

voltage

gain

margin

(at

2.5mV

t0.2dB

Q24

being

Q24

that the center tuning indicator

means

indicators

tumed

Q25

lighting

a low-noise

an

specifications

(1kHz,

(20H2

off because
will
light up. Furthermore,

R99,

resuiting

AMPLIFIER

is

NFB

an

developed high

openloop

of 35.5d8

or maximum

0.}Abc/o THD),

input,

*

iow frequency

resulting in

frequency

base voltage

tumed on and

frequency

on

q22

that

will be

be turned

up

the

type equalizer

and

gain

IHF-A),

20kHz).

Q22

pin

nos.2

and

Q23

neither

on in

of the

on, and

in

Q26

Quartz

performance

low distortion

of 105d8.

for

this

(at

lkHz),

allowable

and equalization

frequency

(or

side

the

being tumed

(left

either

will

has

& 4 will

will

of the detun-

this case. And

being

Locked

circuit include

S/N

when

pin

no.4

hand

side)

Q22

high,

be

tumed

Q25

been

tuned

both

decreased

the

center

C77

tumed

indi-

amplifier

type,

The main

phono

a

input

level

ratio

or

be
be

is

IC

of

is

4.5 TONE CONTROL AMPLIFIER
This

circuit is an

fier with
iHA12017P).

POWER

4.6
Amplifier

The
amplifier
differential

(Q2),

tor
mirror
The
this

and further

Q1
current from

DC voltage.
drift
voltage

The
arrangement,
constant-current

gain.

age

The
high
speed
switching

"High

The
ington
employing
Emitter
sisting
chip,
parallel

newly developed high

AMPLIFIER

Circuit

basic

is shown in

amplifier comprising

the load

employing
current mirror
stage, which

increase

in

the input

Q2,

Because

in

speed bias

Speed Bias

with

temperature

Q2,

prevented.

is
pre-driver

the

power

bias

servocontrol circuit

operation in

power
arrangement,

an SL

Transistor).

of a number of

each transistor being connected ir"r

via

an emitter resistor. This

NFB

type tone control ampli-

performance

circuit arrangement of the

Fig.

4-9. The first

PNP

circuit of which is

NPN

an
provides push-pull

serues to cancel

gain.

circuit absorbs

prevents

and

Q1

stage

load

source

bias voltage

stage

servocontrol circuit. The high

Servocontrol Circuit").

(Q13

stage

the last

RET

The RET

twin transistor

outflorv of base

the

follows

drift of the center

(Q4,

circuit of which

(Q6)

the

-

(Super

smail

any temperature

Qb)

resulting a high volt-

is supplied

power

is

Q16)

stage

is a kind

transistors

IC

power

stage is a

twin transis-

a current

(Q3).

operation in

even harmonics

generation

is a Darlington

provides
stage

a 2-stage Dari-

is

SEPP circuit

Linearit5' Ring

of

on a single

of a

point

employs

by the

non-

(refer

to

IC

con-

provides

t
t

H

H
H

t

a

I

t

n

i

td

Fig.

4-9

Power

+

I

i

;

+

I

amplifier

+

I

r

sx-3aclo

I
I

r

r
r

T

r

T

T

I

f,

F

t
I

t

F

excellent high
ble

lo those
more, becanse
circuit
is
hor,vever,

extremely wide
+

High

active region
mr-rm
circuit

tortion and
Operating Principle

SI)PP
is
a fixed
ancl
X
When

this
side is increased,
ends

voitage
However,
is

Z

resulting in

creases

same
X and
across
polver

lined
to the
while
fhe
(Q3

sequently,
sisting of

Q4,
previous

rent, the base
to

due to the

Furthermore,
follower

ir-r

possibie

'I'he

circuit

60W, 101-lz

Speed

By

operating the

idle current,

prevents

Since

idle current flows

porver

appliecl,

amount

Y

sen'ing as a bias). The voltages

Z,

and

the

circuit,

RB1

of

across

practically

Y

anrl

'I'he

high

the

amount

Z,

poinls

stage from being

This

high speed

Fig.

in

crrcuit,

Q3

collector

and

Q4)

and

circuil

With

R1

same level

the

lvitli R3

frequency

of a small-signal

lhere is

the lorv-frecluency

dorvn

by the input

features

to ZOkHz, THD

Bias

Servocontrol Circuit

(no

reduces heaf loss.

stages

DC level

the

(w'itir

Z

and
positve

porver

the

and the

also heing

point
the

since

constant, the voltage

(PNP power

PNP

the

speed bias

voltage

as the

thereby cancelling

Z

4-11. lVhen

Q1

and

Q4

and
at this time may

rvith

,tr

VR1.

the

junctions

PN

this circuit
shown in
D1

and

of

signal) by

Qf

characteristics

transistor.

no time clonstant

region,

(DC

DC

to

coupling

polver

power

possible

the high speed

generation

the

(see

and Y at this

portion

voltage across

stage bias) will

power

across

voltage

Y,

and

bias servocontrol

and

u'ill

base

power

ensuring

and

Q1

on an AC

may

as the

inputs

capacitor).

described

frequency

0.005Va,

stage

cut-off)

through

Fig.

4-10)

is shifted by D

voltage

the

time will be equal.

of a signal is applied to

stage current

voltage (Vn1)

increased,

X and Z being

stage

servocontrol

points

increase

the voltage

preventing

and

cut off.

there is no

are almost

Q2

be on.

of both

Fig.

a simple shift in DC

emitter resistance.

The

of these

be disregarded. Con-

stage bias circuit con-

formed

is equivalent
4-10.

a constant

point

Z

basis

be considered

compara-

Further-

NFB

in the

amplification

will be

above

only within

and with mini-

bias servocontrol

of switching

normal class

when

across

resulting in

points

being

X

by

may be

(level

cut off,

provide

range

Bdl).

across

on

across

be decreased,

cut

and

across

circuit
signal applied

voitage

Q3,

flow of cur-

fluctuations

(60W

dis-

no signal

and VR

points

points

NPN

the

across both

increased.

X and

points

off.

circuit in-

Y

by the

points

decrease

PNP

the

is out-

cut off,

across

transistors

D3,

and

to the

brought

level.

emitter-

an

the

by

X

the

When
creased
plied
of this emitter-follower
follower voltage
more or less equal to that
is,
produced
applied

forms
bias voltage

same amount

Z

is increased

above

applied.
across
age

B

Y

the idle current
stage
decrease
the signal,
rnanner,
from

In
circuit
signals

the voltage

by tl're

to

this circuit,

the voltage increase across

at

R3.

across the base and collector

part

of the

applied to

that the voltage across

voltage

the

Consequently,

points

across

off

being cut
other words,

from

Fig. 4-'l 0 Normal

Fig.

X

points

(noting

in current).

Q3

thereby

acts to

being

PRE-

ORIVER

PFE.

ORIVER

4-1 1

High

across

positive portion

gain

And

power

(by positive portion

level

Z cancels

and

Z

and

without

that there

and

Q4

preventing

off.

the high speed

prevent

applied to the

speed bias servocontrol

points

it becomes

(Q1).

practically

is

of

the R3 voltage is

stage

will be in

Q3

when no signal

the increase

Y,

cutting the

For

the negative

are operated

"poler

any

power

stage bias circuit

X and Z is

of the signal

the input

Since

the input

points

of

bias circuit. So

excess by
points

of

the decrease

thereby

actually

NPN

the

bias servocontrol

stage cut-off"

polyer

in-

ap-

signal

the emitter-

voltage

1-,

a

(that

signal

X and Z)

the voltage

which

QB

the
the

X

and

the signal)

is being

in

voltage
in

volt-

maintaining

power

PNP

is a slight

portions

in

the same

power

stage.

circuit

of

stage

is

F

F

IJ

POWER

4.7

t

]NDICATOR CIRCUIT

('tA73t8P)

ic

rN

s16NAL

The
fluorescent
thermionic emissions
celerated
segmental
This tube is used to indicate
other

An

Fig.

in
pin

no.6

tains
peak

The dynamic

40dB to obtain a

by

The

tube are driven by
channel)
amplifiers. These amplifiers
levels,
separately as the
these
power
will

light

o*-l

SX-3800

into the
anodes, resulting

symbols.

outline of

4-12.

(

a detector

hold circuit

output

equipped

so each amplifier

amplifiers apply

indicator

up in turn as

output

indicator

fluorescent

FL

the

The

output

of the

)

range of

IC

circuit, conpressor

for both

"peak

pou'er

the

rvith 12

input level increases.

segmetrts, each

power

(FL

tube

from the

in the emission

tube drive

circuit sj"tnal is applied to

(TA?318f

left

the

signal
held"

indicator

HA12010 ICs

are biased at increasing

lvill

voltages

the

the input level rises.

t/?

HOLO

OC AMP

F/LAMENT

Fig.

4-12

indicators feature

tube).

numerals, letters,

segments of

pairs

commence

In

this tube,

cathode are ac-

substance

circuit is shown

-A).

and right

is thus contracted
DC voltage.

of

to the output

successive segment

of the

of

IC

The

(40d8),

channels.

tire

(one

for each

differential

to

operate

And

light.

&

Power

and

con-

and

FL

since

indicator

circuit

PROTECTION

4.8
purpose

The

speakers

output circuit is
the following cases:

L.

2. Upon detection

3. Upon detection of a

Muting

On and Off

supply is
time constant

If
be
through R8

Q4
muting

abruptly decay, and
resiclual component of
rapidly
upon
restore

and the

During
power

short circuit in the
caused by component failure or accident.

Operation when

With

reference

turned on,

there is

off, and the timing capacitor C1 charges

condr,rcts,

on the

When

the

discharge,

the relay will become de-energized and

mnting.

"transient

the

supply is turned on and off.

of the

no input

and R6, and thus

tire

power

polver

CIRCUIT

this circuit is to

of
power

amplifiers.

automatically

operations"

of an overload,

ioad.

voltage

DC

Power

Fig.

to

Q3

(DC)

relay

amplifier

supply is

Q3

Q4

4-13 when the

turns off due

*81

circuit is

on

Qb

operates, and the output

will conduct
+81.

cease to conduct, rvhere-

will

L€VE L
SHIF I

OFFSET

COM.

PENSAIOR

protect

The relay in

opened

Supply is Turned

and

Q4

will be

turned

As a result, C1

in

any of

lvhen

caused by

in the output

porver

*81

to

very

sma11.).

they will

Q6,

turns

removed.

off,

owing

on.

-81

\Vhen

to the

the
the

the

(l'he

up

rvill
rvill

t
t

H

r|

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t
t

t

a

I

H

I

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H

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14

I

t

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J

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six-gaoo

F
T

r

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T

T

T

Overload

The

load (RL)

base

connected
so if
If

RL falls
on,
quence,
deenergized,
open.

DC Voltage

The
ler
Any
the
emitter
turns
is

negative,

As

conseqnence,

become

circuit

Detector

overload

in one

and

emitter

to

RL

decreases,

thereby

Q4

output

and

Q5

DC

voltages

porver

amplifier,

and

on.

C1

Q6

de-energized,

to open.

detector

side
of

the

opposite

Q1

below a prescribed

C1 will

will

turr

thus

causing

Detector

circuit

base

via

appearing

base.

Q5

will rapidly

turns

Q4

circuit

of a Wheatstone

a sensing

corners

will

become

rapidly

on and

is

a low-pass

it
If

on.

will

discharge.

the relay

the

connected

the

wil]

be applied

the voltage

discharge.
C1 will
turn

on

thus

causing

incorporates

bridge.

transistor (e1)

of

the

bridge,

forward

value,

output

to

filter

output

is

rapidly

and

If

the relay

biased.

will

e1

As

conse-

will

become

circuit

the

e6

(Rg,

circuit

to

the

positive,

the

voltage

discharge.

the

ourpur

the

The

are

turn

to

emit-

C2).

of

e6

eb

will

F

ig.

4-

1 3

Protection

circu

ir

I
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DISASSEMBLY

5.

Bonnet

Remove

bonnet
Bottom

Remove

bottom

Panel

Front

Remove

knobs.

from

Q

Case

the

case.

Plate

the

plate.

the

Remove

front

the

two

fifteen

all

the

Panel.

screws

screws

control

screws

two

each

ot

O

to

O

knobs except

and

@

of the

side

detach

two

the

push

nuts

Bonnet

i

I

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case

I
t

I

$\

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Front

panel

Bottom

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l

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to

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PARTS

6.

Panel

Front

panel

Front

AN 8.851

AAD,226

knob

Lever

assembly-

LOCATTON

Front View with Panel Removed

Fluoresc€nt indicator
AAV.OO9

push

Remote
(SPEAKE

ASX,135

Push
ASG,230

;

RS)

switch

Leve'

swrrch

ASK-507

(BR

tube

-

swirch

IGHTNESS)

(POWER)

t7

-...

:

The
the importance

fore,
designation.

fi

when

marh

sotne camponent

on

found

of the sofety

replacing, be sure to

factor

parts

indicates

part.

the

of

parts

use

Fluorescent indicator tube
AAV-OO7

Dial
AXA.264

Push switch
ASG-230

There-

identical

of

knob B

Push

AAD-227

AAA.O66

Knob
AAB.24O

AAB-239

shaft assembly

(FM

MUTINGI

t

I

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jack

Phone
AKN.O30

Panel

Jntenna

swrtch

ASH.O15

A.013

rrrrr;rl

resislor

resistor

(AM

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(TAPE

Varrable
ACT-135

Vilnable
AcT-136

Lever switch

ASK.,] 52

Rear

Terminal

AK 8.076

Bar
ATB.624

Slicie

Termrrtal
AK

TPr
AK 8"063

lPHONES)

'l

(BASS)

0k

(TBEBLE)

10k

{N4ODE,

ilssenrblY

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LOW

STEREO OUT)

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--

-

1

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ILTE

F

--

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_l

R)

-

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erminal

AK8{63

{lNPUI,

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Remoie lever

ASX-128

PFIE

AMP

AAC

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switch

OUT,

erminal

AKE.O54

socket

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{EALANCE)

MONITORI

POWEF

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NOTE:
The indicated

semicondu ctors are
only. Other alternatiue
are listed

in

the

parts

list.

12

representative

semiconductors moy

sx-3E|oo

ones

be used and

Gtx-t39

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10

12

F---_

I

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Top View

terminal assembly

Speaker
GWS-222

64

IFuse

AEK.109

Equalizer assembly

AWM-227

I

il

T

t

I

,,\Power

*ATT-677

Power
GWR.122

$

Power amPlif
GWH.139

Bottom

Power amplif
GWH.139

transformer

supply

Resistor

15

ACN-1

View

(4.7/10W)

assemblY

ier assemblY

ier assembly

t

assembly

Tuner
GWE.133

indicator

FL

AWV-OO9

assembly

;

;

;

t

t

r*l I,l*

I|
i!.r

I

Tuner assembly

GWE.133

control

Tone

GWG-141

assembly

Power supply
GWR.122

Headphones
GWK-146

jack

assembly

assembly

t

il

t

il

I

I

t

t

T

L

I
I
I

l

I
I

I

7.

DIAL

1. Remove
described
page

2.

Remove
tuning

3. Tie
inside

4. Rotate
the rotor

5.

Secure
capacitor
screw@faces

6. Pass

the circumference

diagram),

C,

D,

the

in

16.
the

capacitor.

one

end

the

tuning

the

blades

the tuning

shaft,

the cord

and then

and E in

CORD

bonnet

the'oDisassembly,'

tuning

of the

drum.

tuning

capacitor

are

drum

making

directly

out

through

that

sequence.

STRINGING

case

and front

drum

from

cord

to the

right

fully

intermeshed.

back

sure

upward.

the small

of

the

tuning

take

it

over

panel

section

the

shaft of

stud$located

around

onto

the

that the

securing

opening

drum

pulleys

as

on

the

until

tuning

in

(see

A, B,

?.

Wind

the cord

Pass

8.

9. Turn

10.
1,1. Tum

12. Align

13. Check

14.

it

over

ing

drum

spring hook@so

the
moves
Cut

as it will
of the

starting

Finally

securing
and

smoothly.

off

the

the dial

dial

that

the

around

pulley

2 times,

dial

any

excess

dial shaft

go.

scale,

the

point

of

apply

positions

pointer

dial

F,

that it

shaft,

cord.

pointer

and

then
pointer

dial

the dial

the

locking

(stud

connection.

SX-3EIOO

the

dial

shaft

B times.

wind

it around

finally

and

is tensioned.

and check

counter-clockwise

with

pass

scale.

and

O

the

the

is in

paint

spring

tie

it to

that

the

starting

cord

line with

to

the

the

tun-

the

cord

as

point

over

the

cord

hook$)

far

it.

I

I
I

I

t

I
I

D

ial

shaft

Dial

pointer

Tuning

Starting

drum

point

T

I

t

t

I

Dial

pointer

IJ

ADJUSTMENTS

8.

I

FM

8.1
FM

r

r

TUNER

Tracking

Connect
between R100
assembly

The tuning
not have
tracking
regulating
the tuning capacitor

"adjust

the
ing
spatula

the SIGNAL

(no.? pin

ground.

and

coil in the RF

an

adjusting core.

adjustment

gap

the

VC" found

two outer rotor

capacitors

(Part

Botor

are to be

No.GGK-066)

blacle

I

a

Spatu

(GG

K.066)

fie161

arrrrTl!

U'LIFIP

/nllnll

/

ffi

X

Fig.

8-1

Set up

1.

Set

2.

FUNCTION

iJ.

Tune
set
frequency
modulation
tion
Adjust
mum
Then

5.

the FM
Adjust

6.

maximum

q

,.

RepeatstepsS-6above.

the test equipment

the

the SX-3800

FM

the

75kHz

the TC1

deflection

tune the dial

SG output
the core of

llll llll

X

Adjustment

FM

MUTING

switch to

dial

(FM

SC

to 106MHz,

frequency

(100Vo

deflection of the

modulation).

(OSC
of the

frequency

meter

at 90MHz

between

(VC3).

in the

blades

extended

glsds-

of tuning

FM.

pointer

signal

400H2, frequency

trimmer)

signal meter.

pointer

L8

or DC

of

Q8)

amplifier

are

rotor

The

text

of each
as shown

Fig.8-2.

as

switch

to 106MHz.

generator)

output level

to obtain maxi-

to

90MHz, and

to

(OSC

coil) to

signal meter.

voltmeter

on

the tuner

circuit

Consequently,

performed

and

means

of these

outwards

in

capacitor

OFF,

to

90MHz.

does

stator of

expression

that

tun-

with

Fig.8-1.

and
and

output

to

60d8,

devia-

obtain

by

set

Set

8.
adjust TCz

mer)

(RF
manner
These
tivity
minimum
two extreme
Retune

9.
input
Adjust

10.
between
assembly is

11.

Set
put

SX-3800

12.

Then
mum

(REC

13. Repeat
ments

1.4.

Reset

15. Adjust
indicator

16. Set
the

L7. Adjust

is

Multiplex

I

Connect
to the
thereby

1. Set
output
the
Adjust

2.

no.7

Set

3.

signal
of ?.5kHz
Adjust

4.
the

5. Raise
the

deviation (907o
to

Adjust

6.

minimum
put

FM

the

at L06MHz,

tuning

adjustments

in the

the

signal.

the N core of T2

the

frequency

rotate

distortion

terminal)

steps

are

the

the VR2

FM

the
FM

MUTING

the VR1

operated.

Decoder

the MPX

extemal

using FM

the

level

SX-3800

the VRb

terminal

the MPX

(19kHz)

the

19kHz

the

MPX

7.5kHz
the T1

(REC

SG output

(ANT

as described

difference in

no. 8 and no.9

reduced to DC 0V.

FM

to this

satisfied.

step

reads

FM

(107c

VR4

pilot

FM

SG to Main

deviation

distortion

terminal).

trimmer)

and L2

capacitor)

will ensure

90MHz

frequencies.

pointer

dial

SG output

to

9BMHz,

position.

the D

SG output level

SG

to

to this

on

core

in

the

to

minimum.

-

g

12 above

11" again.

so that

5.
switch to ON.

to

the

(FM

SG

modulator

SG

as extemal

output frequency

(unmodulated),

60dB

frequency.

to obtain

the tuner

SG

modulation

only, and

modulation).

to

obtain

signal at

SG

output level to

modulation),

(107o

core

to

in the

level to

at

above in

­sensitivity

terminals on the tuner

level

point

the

lkHz

within

20 - 30d8, and

and TC3

(ANT

90MHz in the

106MHz range,

position

to

a

so that the

to 60dB

and

"t2

of

demodulated

until

the 5-point

to 20d8,

where

multiplex

terminals

modulation.

a 76kWz

assembly.

output

set the

minimum

REC

(L+R),

and

modulation).

tg0"

dernodulated

(RF

coil) and VCB

steps

optimum

between

with

voltage

and

fine

tune the

to obtain

output

both

require-

SIGNAL

and turn

the mutins

generator)

FNI

of

gBIVIHz,

to

and

signai at

to

FM

deviation

leakage

terminal.

80d8,

and set

6?.5kHz

pilot

to

obtain

3

sensi-

signal

trim-

same

-

?.

and

the

no

out-

mini-

SG,

tune

pilot

of

out-

t
t

H

t

I

t

t
t

t
t
t
t

I

;

t

il

t

rl

I

t

T
t

I
I

Crystal Detector

1.

Set the
output level
the

2. Adjust the B core of
between no.10 terminal
and
Set

3.
tion
7

SkHz

Adjust

4.

AC voltage reading between no.L0 terminal

of the tuner assembly and

FIvl

SG output frequency to 98MHz

to 60dB

SX-3800 to

ground

the

is reduced to DC

FM

SG output

frequency 400H2,

(100V.

A core

the

frequency.

this

m odulation

of

(unmodulated),
T201

so that the voltage

of

the tuner

(t300mV).

0V

level to

T201

60dB,

frequency

).

obtain maximum

to

ground.

deviation

tune

and

assembly

modula-

sx-3aoo

t
T
T

T

t

r

t

I

Connect

SIGNAL

meter

or DC

voltmeter

FM

To

300n ANT

terminals

To

REC

terminal

voltmeter

AC

FM signal

Distortion

MPX

signal

generator

meter

Oscilloscope

generator

t

r

I

t

I

(EXT.

IN

MOD}

Fis.8.2

8.2

AM TUNER

Set up

1.

2. Set the
Tune the SX-3800's dial

3.
and the
frequency to
of 400H2, 30%

30dB - 100d8.

of
Adjust the core of T3

4.
put

level

5. Then
output

6. This time adjust
put

level

?. Repeat steps 3 - 6

test equipment as

the

FUNCTION

AM SG

(REC

tune

frequency

(REC

(AM

600kHz,

modulated and output

terminal).

to 1400kHz and also set the

to

TC5 to obtain

terminal).

Fig.

switch to

pointer

generator)

signal

modulation

to

obtain maximum

1400kH2.

above.

8-3.

AM.

to

maximum

600kHz,

output

frequency

level

out-

AM

SG

out-

8. Set the
adjust
600kHz,
the
steps. This is the
sensitivity across
minimum difference
frequencies.

9. Reset the
1400kH2,

frequency.
Adjust the cores of

10.
mum output

AIvf SG output

coil along the bar

the

and

manner

same

and also tune the

TC4 and

as described

the

SG

AM

(REC

level

level to about 30d8,

antenna and

TCb at 1400kH2,

in the above

adjustment

frequency band,

in sensitivity at different

output

T4 and

terminal).

for

frequency

SX-3800

F7

to obtain

T3 at

optimum

to this

maxi-

I

I

t

in

{

and

I

to

i

I

I

REC terminal

To

Bar antenna coil

To AM
terminal

ANT

1 kfl

resistor

AC voltmeter

AM

signal

illosco

Osc

generator

F

is.

pe

8-3

I

l|

i
I

i

I

I
I

I
I

I

<<

I

H

H
H

T

H

T
T

POWER

8,3

'I'urn

around
VR1(L)
out

any load

switch ON.
DC Balance

Adjust

1.
tween

2. Adjust
tween

ldle

Current

;\djusl

1.
no,28(+)
Adjust

2.
no.17(+) and no.20(*).
Adjust

3.
no.28

Adjust

4.

no.1?

AMPLIFIER

VR3,

in

and

VRb

the counter-clockwise

(R)

VR2

or input

VR1(L)

terminal no.23

(R)

VR2

terminal

(L)

VRB

and no.25(-).

VR4(R)
VR5(L)

and no.25.

VR6(R) for

and no.20.

(L)

to

for

0V

for

0V

no.22

for

120mV

for

120mV

for

150nrV
150mV

and VR4,

direction,

the

center

signal,

and
and

(to

within

ground.

(to

within

ground.

turn

between
between
between
between

(R)

VR6

but

positions.

the

t30mV)
t30mV)

With-

POWER

terminals
terminals
terminals
terminals

fulty

set

be­be-

^ \' -

,fJaJtuL6

ku

/o.n

|

t

4.

h.,r,z--"{*(

aFosc,lt

/.o.'J

o,--"

J

,-

d P

?oir,

Pos

*

{-n"Li,^.g^.

,v\

\

ut

*

,*o,-,{'

?,^.

(_nry'l)

**

**

r.r#

j,

t,t e ;,t;

sx-3Cloo

or

"*.u

^aA.f

{

n

i+>

u

t

{,-L

Q(s,)

+t*<r'.-'U(

.-1.*.1.

r-

T
T

H
FI

I

t
t

I

t
t

R

t-r(2t

t\

I

:

{I))}

I

I

VR2

I

i

I

VR1

I

*.

b

I

-_L

>'

)6f

VR6

II

ltl

@U

u*o

ll

IU

{a)

llL

Itt-

l[

tf|

vR3ll

@n

||l

vR5ll

t!

I

No.1

7

No.20

No.22

No.23

No.25

No.28

R

t*

I

r
r

Power

amplifier

assembly

Fis.

8-4

e3

FL

8.4

INDICATOR CIRCUIT

Frequency Display Circu it

o

The counter
match

FM
displacement of the central
bination

pin

to

of

nos.3 & 4. The matching
SX-3800 is
binations

between

the

equalizer assembly

(PD5009)

IC

ceramic

the inputs

determined according

has been

filter IF offset

frequency)

(of

H

or L level)

IF

designed to

(caused

by com-

applied

offset in the

the

to

of connections and disconnections

R 28 and R

(AWM-22?).

28

resistors

Check

that the

in the

combinations shown in the table below have
followed
ceramic

for

the conesponding

F1 - F3

filters

(3

ranks - color coded).

grades

of

by

com-

FM

Output

Apply

1.
terminals.
Adjusi

2.

voltage
read 8.95V

Adjust

3.
put power

Power

Indicator

Calibration

a l"kHz signal to the

the level of this

on the output

(AC).

VR1(L)

and

VR2(R)

indicator read

POWER

input

signal so

terminals

so

watts.

L0

AMP IN

that the

(SPEAKERS)

that the out-

FM ceramic

{F1-F3}

Red

B lue

Orange

If

the

97.95MH2
signal

is applied
that the
If

accurate

an

available,

not

known

gion,

and

correctly

filter

SX-3800

PD5009

Pin

Pin

no.3

L

H H

H

H=5.5V, L:OV

no.4 R28(2.2n1829(2.2n)
H

L Connect Cut

frequency

or 98.05MH2

to the

receivet, adjust

when a 9B.00MHz

display reads 98.00MH2

9B.00MHz

tune the

broadcasting

check

displayed,

that the

adjusting

input signal

receiver

station

station's

in

TCl

AVtM-227

Cut Connect

Cut Cut

display

reads

TCl so

correctly.

source

to the nearest

the 98MHz

frequency is

if necessary.

re'

is

FL

indicator

assembly

vR2*€)

@_vnr

F

ig. 8-5

I
I
I

I

Eix-3Elclcl

t

t

I

I

I
I
I
I

EXPLODED

9.

Exterior

Components

.."i,

VIEW

('

I

I

I
I

I

I

t

I

11

Key No. Part No.

DCK4OPl

t-

AMM.086

2.

VBZ3OPOSOFMC

3.

ANB.851

4.
AAD.139

AAB.24O

7.

AAB-239
NKgOUC

6­q

wA92F 1

lo.

50FZK

40U1

00

Eonnet case

panel

Front
Lever knob

Knob
Knob

Hood

assembly

­I

I

I
I

1't.

AAA-066

't2.

AAD.227

13.

AAD.226

14.
VBZ3OPOSOFMC

AEC-178

16.
VTZ4OPl

17.

zOFMC

Knob
Push knob B
Push

knob A

plate

Bottom

Foot assembly

25

BOO

Interior

Components

NOfES:
r

Ports witltout

t

The

A

safetl

factor

designation.

Key No.

1.

2.

3.

4.

5.

6.

7.

8.

9.

ro.

A

11,
1?.

13.

14.

15.

part

number cannot

marh

Part

of the

No.

on some component

found

part.

VBZ30P060FMC

PMZ30P060FMC

AEK-rog

VBZ4OPOBOFMC

AKR-O32
AEL-O65

wA92F140U100

be supplied.

I'herefore,

Doscripiion

Pulley

assembly

Pulley

assembly

Dial scale

plate

Side

panel

Dial
Smoother

pointer

Dial
Fuse

6A

Fuse holder

Lamp with wire

frame

Side

replacing,

when

{smalll

holder

L

assembly

(BV,

L

parts

50mA)

indicatee

be

sure

the importance of

to

use

Key

parts

No,

of

Part

identical

46.

47.

48.

49.

50.

GWE-133

51.

52.

53.

,.|\

54. 4TT-677
AKP-042

55.

A

56. AXA-264

57.

58.

59.

60.

No.

I

the

Elescription

Lamp holder

Dial
Capacitor holder
Ground
Center channel

Tuner
Shield
Center
Power
AC

Dial
Transformer holder
Tuning
Ground frame
Side

holder

scale

terminal

assembly

plate

frame

transformer

{AC

drum

(Rl

OUTLETS}

assembly

socket

shalt assembly

frame

2P

R

NKgOFUC

16,

17.
't8.

GWK-l46

'19.

20.

21 .

22.

23.

ACG-001
ASK-507

GWS-223
GWS-224
AEL-047

li

n

24.
GWG-I41

25.

26.
ASX-1 28

27 .

28. AEL-069
AEL-095

29.
Gws-226

30.

31 .

32.

BBT3OPOSOFZK

33.

PMT3OPO6OFZK

34.

35.

JO-

ABN-050

37.

A8E-001

38.
8BT30P060FZK

39.

40.

cover A

Shaft
Headphones
Ceramic

Lever switch

Switch
Switch assembly

Lamp
Remote wire
Tone

Remote
Remote

Lamp with wire

Lamp with wire
Switch

Panel frame
Spacer

Spacer

Mounting

Union

lnternal toothed

Acrylic board

capacitor

assembly

with wire

control

wire

lever

assembly

A

B

plate

nut

jack

(POWERI

assembly

switch

assembly

{0.01 /25OVl

(BV,

SOmA)

(8V,

50mAl

(8V,

50mA)

lock

washer

61 .

GWS-222

62.
AEK-102

63.

A

t'

64.

AEK-106

65.

66.

67.
AEC-327

68.
MTX3OPlOOFZK

69.
8BZ30POB0FZK

70.

71. ABA-1

t:,72.

ADG-023

73. AT8-624

74.

75. GWS-226

76. AK8-076

77.

78. AWM-227

79.
wA35F100N080

80.

AKM-004

8't.

76

panel

Raer

block

holder

cord

(GNDI

(AM

STEREO

A

assembly

assembly

Speaker terminal
Fuse

2.5A

Fuse

lA

Heat

sink

Heat

sink

Rod

reliel

Strain

Screw 3x1 Ox9R

power

AC
Bar-antenna assembly
Terminal
Switch assembly

Terminal
EO holder
Equalizer
EO

holder B

plug

Jumper

OUTI

25

41 t AEL{29

42. AKK{05

1,43.

M. AWV{09

45. AEL-075

e6

AcN-lrs

Lamp

lwedge

Lamp sockst
Resistor
F

Lamp with wire

(4.7/lOtfVl

indicator assemblv

L

type

(8V,

8V,

300mA!

50mAl

ae*-\

29

'{qr

&

228

{{

r,utb

"p

37

r

fr-r

Y

?T

s

8l

/l

&

SX.SClO(l

71

{'

m\

I

l

Heat

Sink Block

I

I

I

t

I

I

I

l

t-------4

1

\)

-hr-.

)Jl

*|.-Y

l',.'

12

I

I

I

Part

No.

Key

1. VBZ30P060FMC
GWR-I22

2.
VMH3OP1

3.

4.

5. 2SC2525-G

(2SC2525-B

6. 2SA1075-G

(25A107s-B

hfe

of

2SC2525 and

7. AEC-488

V8Z30P080FMC

8.

9. STV2H

10. AKH-010

GWH-139

No.

2OFMC

)

)

2SA1 075

Description

Power

supply

Socket

stopper

Power

transistor

Power

transistor

have

should

Insulator

Var istor
Transistor
Heat

P.A.
Power

wafer

socket

sink

holder

amplif ier assembly

assembly

of

same

ranx

1O.

SCHEMATIC

DIAGRAMS,

P.C.

BOARD

CONNECTION

DIAGRAM

External

2SA979

No\

lvoc

Nol

Lot

2SA750
2SC1400
2SC945A

Type

No

2SA904A
2SC1914A

Sull'r

h'F

t{A

fil.l

\"?

..'*"

Appearance

Type

No

1/lt\\

illt\

Bv

ll

cu

AND

of Transistors

2SA733A
2SC1775A

-.-

No

Type

PARTS

lcs

and

Typc

No

LIST

ffi'--::.""

r

)hl

J lt\

su,,

cu

2SC461
2SC535

No

Tyee

n,.'->ft*/

zSC1906

Typ. No

Lot No

2SD313

<>-_

-)

t--

l"'?

il ll\

g

l]\

cu

\

-

Lot

-Lot

-

Type No

No

HA12010
HA1197

"tt([nnnnt'

@

HA1201
NJtt44558DV

5A

.nn'l \

ru#

TA7318P.A

No

PA3007-A

9

ll il,rnn,l

llllll/,/,IllllJ,

."t*;;i]!.Usr

ttl

r=J/

2SA905
2SC1915

No

Lot

-

.-

2SA985
2*2275

2S8682

si A)

qlnj

No

rYoe

rvpe

No

l-,. a

"-j

Lo'lNo

N

.

25C2291

Typa

Lot

No

T#

u[l

-

No

^"

r!\

zsKt68

rvpcNo-

..,."w

3SK73

Type No--.

PA4006-A

H412017P

PO5009

ts

I
I
t

I
T

PARTS

10,3

LIST

.vo?'fs:

c

ll'hen ordering resisiot's,

tht,

Llo u

fo

L'r

1

Ex. 2 lf

I'lte

,'! ,
saf'ety
id e n t i ca I cl e s igna I io n.

irtg

llhen

there

'!7h

and

560s|
47h\I
r/

5!)

(l

|

hen

llrere

lors

).

i;62hl}

rrtarh

factor

e.t

antples.

ohm

fourtd

of

are

5(i

-17
()

R.5

oI0

are 3

562 x

the

conuert

first

effectiue

2

ltolerance

x

I0'

x

lUt

eff<:ctit,e

101

on sotne contponent
parl.'l'herefore,

resistance

digits

is shoran

,i6I

..

47:J

digits

562

I

(any

J

by

(such

whert

ualues

digit

aparl

=

5%

and K

RDt/tPS
RDYEPS
B.\'2H

/rs/P

as in

aN,,4Sa

parts

indicates

replacinq,

into

high

code

lbrnt

0),

from

=

such as 560 ctltnr

109t).
Hs]mJ
EilIZEJ

/(

ElEm

1''

@[]Q
precision

nrelal

E6nmr

the importance

be s.rre

to

as

slrorun

filnt

use

rasis-

of lhe

parls

irr

of

T
I

f

t

I

I

I

t

Miscellaneous

Parts

E LECTRO.PARTS

Part

No.

nrrezZ

f-

ATB.624
AELO29

AE 1.069
AE L{95
AE

L{47
AEL{75
A E 1.065

r-t

Re

,'i',

,i:
A

ll:
.A

I

09

ne r-too
ae r-r

oz

2sc2525-G'
(2SC2525"8')

2sA1o7b-c"
(2SA1075-B

'hf

O1*O4

e of

nsr.soz

i.

nccoor

j,ecruozs

ACN.1 r5
ADG-023

li_

-

)

Symbol

T1 Power
T2

PL1-PL3
PL4, PL6,
PLs
PL8, PLg
PL10
P
FUl Fuse
FU2, FU3
FU4

O1
03, e4

have

should

sl

cr

nt

R2

i'erp.oaz

AKR.O32

AKB.076
CEA lOOM 50L

BOARD ASSEMBLIES

No. D6scription

GWE.133

AWS.146
GWH-1 39
GWR.122
GWS-226

GWX463
GWG-14'I

Tuner
Switch

Power
Power
Switch

Detector
Tone

& Description

Bar-antenna

Lamp

PL7

Lamp
Lamp
Lamp with wire

Ll 1 Lamp

02

,

the

Lamp with

Fuse
Fuse

rank

same

Lever switch

Ceramie capacitor
Resistor
Resistor

power

AC
AC

socket
Fuse
Terminal

assembly

assembly

ier

amplif
supply assembly

assembly

control assembly

assembly

assembly

trans{ormer

assembly

(wedge

wilh wire

with wire

wire

w;th wire

(64)
(1A)
(1.5A)

(POWER)

{2.2M)
(4.7110W)

cord

(AC

holder

(AM

type)

(8V,

50mA)

(8V,50mAl

50mA}

{8V,

(8V,

50mA)

(0.01

/250V1

OUTLETS)

STEREO OUT)

Part

No.

GWS-224

AWM-227

GWS-222

GWS.223
GWK.146

AWV-OO9

Tuner Assembly

CAPACITORS

Part

No,

ACK-035
ACM-006

ccDcH

070D 50
ccDcH
ccDcH 040c 50
ccDcH 120J 50
ccDcH

ccDcH 330J 50
ACG-01
CCDLH OBOD 50
ccoRH 150J
ccDUJ 120J

CCDXL
ccDsL
ccDsL
ccDSL 151J 50
CKDYB 1OzK

CKDYB.I22K 50
CKDYF 1032 50

CKDYF 1O3Z 50
CKDYF

CKDYF

H6BK

CGB

50

010c

150J

50

I

50

50

OBOD 50

390J 50
101J

50

473250

4732

5A

5OO

50

Symbol & Description

assembly

Switch
Equalizer
Speaker

Switch
Headphones
F

assembly

terminal

assembly

L indicator assembly

iack

assembly

assembly

(GWE-133)

& Description

Symbol

C49

Tuning
Trimmer

Ceramic

C22.C23, C25, C32,

C45.

C44,
C92-C95, Cl01, C108

Cl07

Tnr

c50
cl6
cI4

1

c1
c21

c20

c52
cl9
c17

rr I nQ

c89
c75
c24,
c34, C35, C301, C302
c82, C91, C1 5

c99
c2, c5-Q7, C13,

C41, C42,

c38,

cB6, CB7, C90,

c9, cl0, c26-c29, C31, C37,

C47, C48, C14

c46,

c96,

Cl00,

al a

capacitor

(390P/50V)

C8r

C39, C40,

Part

No.

CKDYF 1032
CQMA 153K
coMA 473J

cosH

331J 50
152J

cosH
CEANL R22M
CEANL

OlOM 50

CEANL

2R2M 50

coMA

1 53K 50

CEA

OlOM
CEA 3R3M 50L
CEA 4R7M
CEA lOOM

CEA

22OM 25L
CEA 47OM 1OL
cEA

101M

CEA

lOIM

CEA

221M

CEA 331M
CEA 471M 16L

47OM

CEA

RESISTORS

Part

No.

RD%PM

RD%PM t]NrJ J

RD/1PM

RD%PMF

ij

RN%SO

c92-048
c92-049
ACP-056
ACP-055
ACV-18'l

NNN

LINN

nnn J

nnlrn

50

50

50

sOL

50L

sOL

t0L

25L

16L

1OL

25L

50

50

Nole:

J

J

F

Symbol

& Description

uco
?141

c53

voo

c55, C57

nlna

c65, C66, C70,
c63, C64

c303,

c304

?14

c79,

CgB

c97

c33, C43, C69

cB0
c30,

c76, c77
c36, CB3,
c12

c54
c51 , c85
c3,

c4,

llhen

ordering resrsfom,

resistance

rewrite

then

Symbol & Description

R1-R11,
R24-n29,

R47-R53,
R67-R99,

R128*8140.

FI 1? R'N

R30

VR1
VR2
VR4
VR5
VR6

C71

C84

c78

ualue

into code

part

tlze

Rr3, R15-F19,R21

-R45

R3 1
R56-R59,
F101-R125

R301-R316

R46, R126

Semi-fixed 47k
Semi-fixed 10k

Semi-f
SemiJixed
Variable

conuert

form,

no. as

R61, R63. R65,

ixed

22k

6.Bk
(VOLUME)

100k

the

and

before.

,R22,

Part

No,

ATF-106r
ATF,OB9
ATF.1O5

ATF.O38

SEMICONDUCTORS
Part

No.

35K73
2SK34
2SK 1

68

zSC1

906

2SA535-A

HA120'l

NJM4558DV
PA3007-A
PA4006-A
HA',l

197

zSC1

91 9
2SC2575
{2SC945A)
2SA1

100

(25A733A)

HA1

201

0

MZ-061

(wz-0611

tDt535

{'152473','

1SV69-03

OTHERS

Part

No.

ASX-130
ASK-r 52

AKA.O13
AKB-063

Symbol & Description

F1-F3
F4,

FS
F6
F7

Symbol & Description

o1
02
03,

o1

o4

06,

07, 09
O8
010
01

1

o12

nra

014,

016-021

o22,423,

Dl, 02
D3, Ds*D17

D18

Symbol & Description

s1, s2
s3, s4

5

O2B-O35

Remote
Lever

Terminal
Terminal

FM

ceramic fitter

FM

low-pass

AM

ceramic firrer

AM 455kHz f

,Q24*A26

switch

f

itter

ilter

lever

swrtch

(MUTING,

LOUDNESS)

{ANTENNA}
(TAPE)

(TAoE

t

I

t

T

t

t
t
t

;

t
t

)

;

il

ACT-021

TRANSFORMERS,

Part

No.

ATE.OOS
ATE.045
ATB-063
ATB-069

ATC"097

T24"O28

Arc-o72

4A

COILS

VR7

AND FILTEBS

& Description

9vlrrl

T1
T2

IJ

T4

L2
L3, L7,

L9-L13,

L8

Variable

FM

IFT
FM DET
AM OSC
AM lF

coil

FM

antenna

L15
RF

coil

FM

OSC coil

(BALANCE)

1M

transformer

coil

coil

Precautions

t

t

FIqI

The

in

the
of displacement
into 3 ranhs,
the
always

When
(color)
The crystal

detector

types

ceramic

tuner
the

head.
color

ceramic

the

tuner

basis of their respective

(red,

top

use

filterc

placing

as

well as the

assembly

coffespanding

filters

assembly

different

When replacing

is

some as the

(ATF.106,

filters

assembly

from

these being

orange, and.

of the

arder$

for

part

resonator (ASS-012,

(G\VX-463)

to the
(ATF-L06,
(GWE-133).

colored

crystal resonators,

ceramic

j3J)

(GWE.

IF

the center

same color

dots

offset ualues (the

identified

blue). When replacing

these

filters,

no.

is

IF

offset ualues

symbol nos.F.l

These

(red,

filters.

symbol

hos

lF). Filters

code.

syntbol no.Xl) in

auailable in

may be
blue,

nos.Ft - F'3)

been

selected

b5' color

designate

are

3 different

of the Ittrf

-F3)

identified

orange) at the

chech lhat the

graded.

coding nt

the

on

degree

filters,

grad,e

lhe

in

the

by

t

t

t
il

I

t

;

six-gaoo

Detector Assembly

{GWX-463}

CAPACITORS

Part

No

101J 50

ccDsl
ccDWK 150K 50 C202

471K

CKDYB
CKDYF 1032 50

50 C204

No

fe

RESISTORS

Part

No.

RD%PM ilillr

J

SEMICONDUCTORS

No.

2SC461-B
2-1K261

RS

OTH E

No.

Pari

ASS-012*
ATE.O50

Equalizer

Assembly

CAPACITORS

Part

No.

Symbol & Description

c201

C206

llhen

ordering

resistance ualue

rewrite

then

& Description

Symbol

-R208

R

201

Symbol & DescriptionPart

resrsfors, conuert

into

part

the

o201
D201, D202

Symbcl &

X1
T201

Dascription

Crystal

FM

detector transformer

lAwM-227l.

Symbol & D€scription

code

form,

no,

as before.

resonator

the

and

OTHERS

Part No,

ASG-231
AKB.063

Symbol

S1

Tone Control Assembly

CAPACITORS

Part

No.

ccDsL 470K 50
ccDsL 101K
CKDYB

471 K 50
coMA 332K
coMA

273K 50

CWANL R33M 50
CEANL R22M
CEANL O.I OM 50
CEANL

lOOM

CEANL 4FI7M

CEA 47OM
CEA 47OM
CEA

1O1M 1OL

RESISTORS

Part

No.

RD/4PM

NNN J

ACT-135
ACT.136

50

50

50

5OL

25L

lynlgt9 9:*:ie{9!

c3, c4
c5, c6, c9, c10
cl1,Cl2
c23, C24
cI9, C20

50

50

Note:

c21 , C22
c15. C16
c17, C't 8, C25,C26
c27 , C28, C33, C34

vt,wz

c29-C32
c13,
c7, c8

When ordering resistors,
resistance ualue
then rewrite

Symbol & Description

R 1

VR1
VR2

-840

& Descriprion

Push

switch

Terminal

(lNPUTl

tGWG-141)

C14

into code

part

the

Variable 10k
Variable 10k

tFUNCTIONI

convert the

form,

no.

at before.

{BASS)
(TREBLE)

and

470K

ccDsL
ccDsL 10tK
CKDYB

471 K

50
50

50
COMA 122J 50
COMA 1B3J 50
cKDYF
coMA
CEANL 4R7M
CEA
CFA
CKDYF

1032

683J

47OM
471 M

4732

50

50

50
sOL
6L

50

No fe.

RESISTORS

Parl

No.

RD%PM
RN%PO |:]TJNN F
RS2P

,

CNN

nllr J

J

SEMICONDUCTOBS

Part

No,

HA1

7P

201

1

S1 555 Dl,

c7, c8
c5, c6, c17, ClB
c19. C20
c1 3,

C14

\.t t.

utz

c25
cl 5, c16
c3,

c4, c23, C24
cl , c2, c21,
c9,

cr0

LZO

When

resistonce

then rewrite

Symbol & Description

R1-R6, R11, R12,
R7-R10,

Symbol & Description

D2

c21 , c22

ordering reslsfors,

ualue

into

part

the

R13, Fr14

R15-R26,

convert the

code

form,

no.

as before.

and

R28,R29

SEMICONDUCTORS
Part No.

HAI

7P

201

OTHERS

Part

No,

ASK-1 52

Switch Assembly

Part

No.

coMA 332J 50
ASH-01

5

Switch Assembly

Part

No,

ASG-230

(AWS-146)

(GWS-226)

& Description

Symbol

o1, 02

Symbol & Description

s1, s2 Lever switch

Symbol &

c't, c2

q1

Symbol & Description

s5

Dgscription

Slide switch

Push

switch

{MODE,

FILTERI

LOW

{DE-EMPHASIS)

(FM

MUTING)

43

H

Power

CAPACITORS

Part

RESf

Part

ARD%PMFnnnJ

a

;!

,{

SEMICONDUCTORS

Part

Amplifier

No.

103K

coMA
coMA
coMA
ccDsL 101K
ccDsL

ccDsL 470K
ccDsl
CEANL 4R7M
CEANP R22M
cEA 471M

cEA 101M
ACG{09

STORS

No.

RD%PM

RD%PM

RD%PMF
RD%PS

Roz,rsr

RN,IH
RS2P

ncru-t

TH103-2
ACP-062

ACP-o19
ACP-o10

No.

2SC1775A"E­(2SC

1 77sA-F')

2SA979-F'
(25A979-G
*hfe

of

O1O4

'hfe

of

0104

50
823K 50
332K

250 C1 13,

500

390K 50

50

221 K 50

50L
s0

6L

25L C't34

Note: \fhen

J

onn

J

nnn

EDfi J R153-R156,

DilN J F143,

.t

nnn

NND K

J

I]CN

ra

.

)

O101

and

the

O101

F-rank.

and

have

have the G"rank.

Assembly

Symbol &

O101, 0102

0103, 0104

Q102

Q102

(GWH-139)

Symbol & Delcription

Cl17-C120

Cl31,

Cl32

14

Ct
C121-C124
c1 1 1.

C105-Cl 10
C103, Cl04
Cl01,
C125, C126
Cl33

C127

resistance

then rewrite

Symbol & Description

R101-R108,

R119,
R149-R152,

R177-R181,

R109,R110,R113,R1.t4,R117,R118,

R123,

nr21 , R12z

R173,
R175,

R165,

Th101,

VR1, VR2
VR3,
VR5,

should

should have the

,l

Cl

2

C102

-C130

Ceramic

ord.ering resisfors,

ualue

Rl11, R112,

R120.

R125,

R157.

Rl84-R186

R124,

A127-R142,8147,

R159_R164

R144

R174
R176

R167

Th102

Semi-f ixed

VR4

Semi-fixed

VR6

Semi-f

Oescription

have

the E-rank. if O103,

into

part

tlrc

Rl26,

Rl58, R169,

ixed

F"rank,

(0.047i1

code

SOV)

eonuert

form,

no.

as before

R116

R115

nraS,'nraj'

Rl72,

R148

330k
100
100k

and

if 0103

and

the

and

Part

oTHERS

part

Power

CAPACITOBS

Part No.

No,

2SC r400
2SA905
2SA904A
2SC'1914A

2SC2275-O'

a

12sc2275.P'l

f]2SA985.O*

(2SA985"P')
*hfe

Q125-01

of

2SC2575
2SCl 384

MZ-061
(wz-061)

STV2H

1

0E2

1 S1 555
(152076)

1

S2471

MZ-1

50

(wz-1

50)

No.

ASR-067
pizsopooorrvlc

28 should

Supply Assembly

cEA

100M 50L C206,C227
cEA 470M
cEA
cEA
cEA 470M

cEA471l!416L
cEA 102M
cEA 101M
cEA
cEA 471M

cEA

ACG-004

ccDsl
CKDYF

ACH-212

50L
22'lM 16L
221P

80

50L

351

25L

470M

10L

6L C219

2R2M 50L

101K

50 C204.C205

473250

Symbol

& Descriprion

o

o1

l 13,

01

I5,
4121
0123,4124

O125. O
0127, 0128

have

o't29-o133
o134

D101-Dl06

D109, D110
D111.D112,D117,D118
D1l3-D116

o1

23-D1

vtzo

9yqlglt

R

Ll Relav

A119,

14,

01

16

Q122

,

l26

the same rank

25,

o"*lelgl

A120

D128

(GWR-j22)

$l-o-! lQeryrlqlon

C209,

C210

C217
C202,C203
C207, C20a

C213,C214

C215

C216
C21B

C223

C201 , C21'l , C224 Ceramic{0.01/150V)

C220

C225,

C226

Electrolytic

(

1

2000/56V)

H
t

T

I

t

I
I
I

t

I

t

I

t

I
I

2SC2291

2SA750

{2SA726S}
2SC1915
2SA750

44

0105, 0106
0107, 0108

0109, 0110
01

1 1. Q1

1 2,

01 17, 01

I

18

lf

il

I

sx-3€lCIcl

I
I

t

I
I

T
T
I

I
I

I

t

t

I

T

t

:

When ordering
resistance ualue

then
Symbol

R201, R202,
R215,
R203-R206,

J

R212,
R210, R216

R222

RESISTORS

Part,No.

RD%PM :I[,]fJ

RD%PMF llCil

;i;

RD%PS irnl]
RSIP

flui_.1

Ro'zpsr rnr.l

A

Note

J

J

J

SEMICONDUCTORS

Parl No.

3

2SD31
2SK34
25C2575
2SC1915
2SB6B2

2S8507

{
2SA91 2

2SA905

r

rl.

KZ L.140

{

sooa

,f .

MZ-171
MZ.1 10

OTH

Part No.

Speakers

Part

i.

,

Switch

Part No. Symbol

Headphones
lg.l

}

orz

l5t33C

1

52076)

(SR3AM.4}

{w2,110)

E BS

ATT.678
P

BZ 3OPO6OF

Terminal

No,

AKE-054
ASX.137

Assembly

ASX-135

Io,

AKN.O3O
RS2P

331J

M

Jack

Symbol

0201,
o202, o206

0203,
o204
uzu0

o207

o208

D20
D201
D208, D215

0209-4212

D2l3
o214

Symbol

T1

C

Assembly

Symbol

tGWS-223)

Assembly

Symbol

R1, R2

1 - D206

resisfors,

into code

rewrite the

& Description

R217,R224-R228

R21 3,

&

0209, o210

021

&

part

R207-R209,

R223

R230, R231

Description

1

Description

Healer transformer

tGWS-222)

Doscription

&

Terminal
Remote

slide

(SPEAKERS}

Description

&

Remote

PUsh

(SPEAKERS}

(GWK-146)

& Description

Phone

iack

form,

switch

the

and

conuert

no. as before.

R211,R214,

(SPEAKERS)

switch

(PHONES)

FL Indicator

CAPACITORS

Part No.

R47M sOL

CEA
CEA 47,I M lOL
CKDYF
cKoYX 473M 25
ccDcH

ccDcH
CEANL OlOM 50
CEA 101M
coMA 332J 50

cosH 201J

ACM-010
CEA OlOM sOL
CEA

221M
ccDSL
CKDYF

RESISTORS

Part

No.

RDTAPM OIIO
ACP-001

SEMICONDUCTORS
Part

No.

TA7318P-A
HAI

201 0
M54451
PD5009
2SC2575

{2SC945A)
2SC461

OTHERS
Part

No.

T24-028
AAV-OO7

AAV"O09

ASS-0I 1
vcz30P080FMc

Switch

Part No.

ASG.230 s3

Assembly

1032

50

101K

50

020c 50

251

50

16L

't01K

50

473250

Note:

J

P

Assembly

(AWV-009)

Descriplion

&

Symbol

a'l

c16, C2B
c12,Cl4,

c7-c9,

vzz

c1, c2
c10
c4, c5

c23

TC1

c33-C39

c31

Cl7-C21, C6

c1 3, C1

Trimmer

c30, c32

c27,C29

When ordering

resistance

then

Symbol &

Rr-86. R9-R33.
VR1. VR2 Semi-f

Symbol

o1
02, 03

o4
06-0lo

Ql1

Symbol

LI, LZ

V1

v2

X1

ualue

rewrite the

Doscription

Description

&

Description

&

(GWS-z24)

Description

&

Symbol

C26

5, C2s,

resrsfors, conuert

code

into

part

no. as before.

R35-R61

ixed 2.2k

RF choke coil

Fluorescent indicator tube

{FBEOUENCY}

Fluorescent

(POW€Fr)
Crystal

Push

resonator

switch

indicator tube

{BR

the

and

form,

IGHTNESS)

t

45

T

11.

PACKING

t
t

T

t

t \:./

T

t

;

Key No. Part

1.

ADH.002

2. AR8-355

3. AHD-7s5

4.

AHA-246

No.

D*cription

T-type FM
Operating
Packing

case

pad

Side

t

T

T

t

T

antenna

instructions

t

il

I

il
rf

rf

I

t
t

I

t

FM

Ouartz

STEREO

Locked

RECEIVER

$)rrroN€Err'

t
t
t
t
t
t

t

I

siFSgoos,c,s

r

The basic
service manual
with

1.

SPEC|FICATIONS

The specifications
KU

type except

Power

KU type

S/G and

Power

KU

type

S/Gond

Weight

KU

type

S/G and

performance

exception

Requirements

S type.s

Consumption

Sllpes

(without

S lypes

of

for

package)

of the

is

applicable

this

supplements.

S/C and

for

following

. . .

. .AC t t1V,

S/G

to

the

S types

sections.

. .

tZ1V,

. . t6.2hg

.

. .t6.7hg

and

S/G and

are

. .AC 120V,

types

S

S types. Please

the same

220V

and

50/60H2

. 200W

......200W

(JStb
(S6lb

are the

as the

60Hz

240V.

(uL)

t2oz)
IJoz)

same as

refer

the

KU

to the

type.

KU type

This

additional

service

manual

t

t

I

2, CONTRAST

ASSEMBLy

Symbol

Switch

ELECTRO-PARTS

Symbol

rl

li

stl

{,

srs

Cr

Anr

,t

$rur

PACKING

Symbol

Power

Lever

Line
Resistor
Fuse
AC

F

use

AND FURNISHED

Description

assembly

Description

transformer

switch

vollage

2.2M

holder

power

cord

Description

{POWER)

selector

PABTS

OF MISCELLANEOUS

NO?ES;
t

Parts witltoul

t

The

$

safety
designation.

marh

factor

part

number cannot

found

part.

the

of

KU

AWS-146

KU

ATT-577
ASK-507

ACN-029
AKR.O32
ADG"O23

AEK-109

KU

on some component

be

Therefore,

Part

typa

Part

typo

Part

type

PARTS

supplied.

when replacing,

No.

S/G, S typss

AWS-148

No.

S/G, S types

ATT-683
ASK-508
AKR.O31

ADG-046
A€K-109
AEK.l01

No.

S/G, S

parts

types

indicates

be sure to use

(S/c)
(S)

the

importance

parts

of idenlical

Remarks

DE.EMPHASIS

Remarks

Remarks

I

of the

I
t

t
t

I

T

t

Operating

Fuse

Packing

case

Spacer

instructions

ARB-355

AHD-755

ARB-357

AEK-101

{A8K.107
AHD.75B
AHD-755
AH8-1

04

(S/c)

(S/GI

(S)

(S/c)

t

(S}

t
I

I

l|

rf

il
il

+

il

I

I

3

3.

SCHEMATIC

3.1

SCHEMATIC

DIAGRAM

DIAGRAM, P.C.

Gro

rEc2

r
I

LCN

iEc'

I

I

BOARD

PATTERNS AND 1

b.

vrrdr 6 $v .!<.o!

MtlAcf cuffxt\r

s!".r "d!,q !'

::t
',:-j

oc,or!a {v,,'

i (OC

Vri!.!nI
Oa.!,'mr.rErvrrnf,

Cr6A

hyr

rh,

ild

d!

!b.

m4.tror

si.ty

frE

s!

uotrloi t

r&

s2r

M@rrG

sJ. slrlrc

t-?od8t
L L@€Ss
s5: tM

{UY'NG g!-oFF
5e r fu{rroi
s6-? FU&TIO{
s6-l: FU{drOff
s6-.1 FURCrrd

sti rr
50r

59
510 @r6xT{ESS
s'!
s'?: sElxEF

5r3i 9{Ai€R
5rl-?

5$, tuER
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du.

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(AUr

r4X}
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G-asm$

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trLrER

LOw

sEAxcR { a)

raJ

|SPA)

SEAX€R ISPAr

!R€ vcT&

ih.

rh.rrr( a',{

't

b.r{

i6,6n.d@"nt,n,td,s

l6x.l d-$F

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60 w

m'Brt nq,r!

loitrf{?rtd!

oi !@. omFan

l-lo,

ol th.nr.!

ft-q!

?

on­a­q-

8-oFF
d-q!t

Or­On

4:

StgtrO

8Ft6iT

q!­d-qlt

(E­ff-Qfl
oil

60rn.i*&&rd n na

.

I

s

6c

)

th

th.'.io,.

leq
qlr

€f

€!

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-*r.

-

-rcrc

-oMEe
FF

ort

-6F

-

-

?dv-?{

al:

.0!rr

*n.n,al-il{-

rirrrl

I

"1'#

L

...

fi5d;71 |

1

-

qr.?

aaI

,rd.*dr

,ei,]

A.r'y

AwM-2?7

HArzqTF
ct .dl

m_{

'1"'

ql

@

I

74';

_l

."

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,!J

4l

-.]1-­tt 1

-*--r,,t.^ i

)m*l;:

-t

:e

|

Og ?SCl9'9

"":i:"'.

-6)l

A

iBi i^hl'*'cr

t-'tl

I tl

Y

I

I

{

--l

L

i

--

j

I

PARTS

D

€
q5

ut?d

23(rS

LIST

-J

il,*3-'

- ---t

I

I

t"

:r

L-

.rOr
,6l

@l

J
ir"

l''

OrJF2l,2atd

?9CAE

oa,23.2F!

2StX@

t

swrTcH

GWS-226

b.

I

I

.

PW€f,

o?o!&.2ro

SSfLy

A..'L

GWR-IZ2

zsu.

93Sr&9^!.sl_s I

_

_ _

POWER

AnP

A$'r

G#-t39

lr-l--.q.iliffi

_

i'

l

I

I

I

I

I

I
I

j

I

f*---<

I

I

aror.ro2

6cr775A

@srrq

?$9t9

q6,6

?SC2?91

qo7!l6

zs^@

@,iro

?*D6

Qilrril2

?$EO

's"''-

3il3:i!11

oil1.il6 2996

Qilt,l!8 2SA750
or2rtr??

?$$aA
or25,r?a 5c6aa
o?5!126 2SC??75

ora7,!?a

2sis5

qa9-lS

?SC675

qr

2scr!6a

ftrFl

$EAX€R
TEnr'IilAL

adt

Ga/s- 222

rtm'_l

;11ffifl

It-tt*,"d*, i

UJl--":':J

H€A8F}Si€S

JACK Ardy

ffi-16

sX-3EtC'O/si/GirS

NOTE:

The indicated
only. Other alternatiue

listed

arc

|

semiconductors

parts

in the

representative

semiconductors may be used,

list.

are

ones

and

Gflr-t39

.-._l-_i_--_.-*<ar

r

€tX-ggtOO/gi/Glrs

n

t

;

t
t

;

t

3.2

Part

No.

coMA
coMA

ASH{,I

SWTTCH

152J

332J 50

7

ASSEMBLY

50

(AWS-148)

Symbol & Description

cl,

c2

c3,

c4

s1

Slide switch

(DE.EMPHASIS)

t
t

;

;

;

t

;

;

I

;