Pioneer Sx-626 kcw User manual

<ART-027-0>

SERVICH

MANUAL

AM

/FM

STEREO

RECEIVER

SX-626

KCW,

KUW,

FVZW,

NBW,

FW

NOTE:

MODEL

SX-626

COMES

IN

FIVE

VERSIONS

DISTINGUISHED

AS

FOLLOWS:

Round

label

on

rear

panel

120V

only

CSA

approved

(Canada)

KUW

120V

only

UL

approved

(U.S.A.)

FVZW

5-position

selector

FTZ

approved

(West

Germany)

NBW

220V

only

SEMCO

(Sweden),

NEMCO

(Norway)

and

DEMCO

(Denmark)

approved

FW

5-position

selector

General

export

model

|

with

de-emphasis

selector

switch

—

owe

WQPIONEER

Ook

WN

a

10.

11.

SxX-626

CONTENTS

SPECIFICATIONS

2...

ce

ee

eee

3

FRONT

PANEL

FACILITIES

.......-

2

ccc

eee

reer

eer

ee

eee

5

CONNECTION

DIAGRAM

......

eee

ee

eee

es

7

BLOCK

DIAGRAM

_..........

ee

eee

9

DISASSEMBLY

.....

eee

ee

11

PARTS

AND

P.C.

BOARD

LOCATION

6.1

Top

View

...

cee

eee

ee

12

6.2

Bottom

View

......

20.0

ee

eee

eas

13

ALIGNMENT

PROCEDURE

7.1

Required

measuring

instruments

©...

-

++

eee

ee

eee

ee

eee

14

7.2

AMadjustment

2.2...

eee

ee

eee

tee

ee

ees

14

7.3.

FMadjustment

.....

0.0

eee

ee

eens

14

DIAL

CORD

STRINGING

..

ww

ee

et

ee

es

15

PACKING

METHOD

AND

PART

NUMBERS

.....-----+

ess

errr

res

16

EXPLODED

VIEW

AND

PARTS

LIST

2...

eee

eens

16

SCHEMATIC

DIAGRAMS,

P.C.

BOARD

PATTERNS

AND

PARTS

LIST

41.1.

Circuit

Connection

Diagram

and

Miscellaneous

Parts

....----+-->

21

11.2

Tuner

Assembly

(AWE-031)

.....

0.20

eee

ete

nee

eee

26

11.3

Equalizer

Amplifier

Assembly

(W21-004)

.....

0.00

eee

eens

32

11.4

Control

Amplifier

Assembly

(AWG-008)

.....----0e

eee

35

11.5

Power

Amplifier

Assembly

(AWH-002)

(AWH-013)

........-+5:

38

11.6

Power

Supply

Circuit

Assembly

(AWR-029)

...---+-

eee

e

ees

42

11.7

Switch

Circuit

Assembly

(AWS-013)

«0...

eee

ee

es

44

11.8

Switch

Circuit

Assembly (AWS-014)

2...

eee

ee

eee

45

11.9

CR

&

Meter

Drive

Assembly

(AWM-050)

ww

ee

eee

46

“ho

i

A

NOTE:

This

SX-626

Service

Manual

applies

to:

1)

All

the

models

with

IC-indicated

round

label

each

attached

above

the

power

cords

on

the

rear

panels

(see

page

8);

and

2)

The

following

five

models

at

which

the

respective

sequence

numbers

begin:

KUW

model

.........

sowie,

Ge

eo

aioe

e

Cee

hue

ees

No.

3744801

KCW

model

...

2...

ee

et

te

eee

No.

3504201

FVZW

model

........2.-

20

eee

ee

eee

No.

1612501

NBW

model

..........

022+

e

eee

eres

...

No.

4301401

BPW

modell

feces

ae

ie

MS

See

a

ee

No.

1212001

1.

SPECIFICATIONS

SEMICONDUCTORS

a

IOs

“A

edie

sad

kettle

pate

Transistors

.....

ated

cates

Diodes

2.

ia

ee he

eG

es

POWER

AMPLIFIER

SECTION

Music

Power

Output

(IHF)

...---

Continuous

Power

Output

....+.-

{each

channel

driven)

Continuous

Power

Output

.....--

(both

channels

driven}

Power

Output

in

the

range

of

QOHZ

to

2OKHZ

wee

ee

eee

(both

channels

driven)

Harmonic

Distortion

...-..--+--

Intermodulation

Distortion

....--.

Power

Bandwidth

(IHF)

......-.

Frequency

Response

.....-++-+>

Input

Sensitivity/Impedance

....-.

(1kHz,

Continuous

power

output)

Speakers

.-

eee

ee

es

Damping

Factor

.....--

eee

PREAMPLIFIER

SECTION

Output

Voltage

..--

eee eee

eee

Harmonic

Distortion

........--5

Frequency

Response

...-..++++>

Input

Sensitivity/Impedance

......

(1kHz,

for

rated

output}

Recording

Output.

..,

+--+

eee

BASS

Control

...

0.250

eee

TREBLE

Control

.....-.-200-6-

LOW

Filter

2...

....222

eee

HIGH

Filter

.-....--02-500

eee

Equalization

Curve

....--.....--

Loudness

Contour

.......+0+06-

Hum

and

Noise

(IHF)

........-5

110Watts

(4Q)

76Watts

(8Q)

40W/40W

(4Q)

32W/32W

(8Q)

30W

+

30W

(422)

27W

+

27W

(822)

20W

+

20W

(8Q,

Harmonic

distortion

fess

than

1%)

Less

than

1%

(Continuous

power

output)

Less

than

0.09%

(16W/16W,

82

output)

Less

than

1%

(Continuous

power

output)

Less

than

0.4%

(16W/16W,

82

output)

10Hz

to

70kHz

(89,

Harmonic

distortion

less

than

1%)

5Hz

to

80kHz,

+

1dB

500mV/60kQ2.

(MAIN

IN)

4

to

162

40

(8Q2,

1kHz)

500mV

(Rated

output),

3V

(Max.)

Less

than

0.5%

15Hz

to

20kHz,

+1dB

PHONO

1.

2.5mV/45kQ

PHONO

2

2.5mV/45kQ

MIC

2.2mMV/22kQ

AUX

200mV/100kQ2

TAPE

MONITOR

1,

2

200mV/70k{2

TAPE

REC

1,

2

(Pin

jack)

200mV

TAPE

REC

(DIN

connector)

35mV

—11

dB,

+11

dB/100Hz

—11

dB,

+10.5

dB/10kHz

—8dB/50Hz

(6dB/oct.)

—9dB/10kHz

(6dB/oct.)

PHONO:

RIAA

S.T.D.

+10dB/100Hz,

+6dB/10kHz

withVolume

Control!

set

at

—40dB

position.

PHONO

More

than

85dB

AUX

More

than

95dB

FM

TUNER

SECTION

F

requency

Range

......-..

Usable

Sensitivity

(IHF)

....

Capture

Ratio

(IHF)

.....-.

Selectivity

(IHF)

......---

Image

Rejection

.........

IF

Rejection

...---

eee

&

Spurious

Rejection

....-.---

AM

Suppression

...+-+----

Signal-to-Noise

Ratio

....-.

Harmonic

Distortion

......

Tuning

Indicator

....+-+--

Muting

2...

0-0

eee

Stereo

Separation

....--+-+-

Sub

Carrier

Suppression

.....

De-emphasis

Switch

..-----+>

Antenna

Input

...----.--

AM

TUNER

SECTION

Frequency

Range......-.-+

Usable

Sensitivity

(IHF)

....-

Selectivity

(IHF)

.........-

Image

Rejection

...-..+---

{F

Rejection

..........-.

Signal-to-Noise

Ratio

....-.

Antenna

.....-2

ee ee

eee

MISCELLANEOUS

Power

Requirements......-.-

Power

Consumption

.......

Dimensions

(overall)

......-

NOTE:

Specifications

and

the

due

to

improvements.

SX-626

....

88MHz

to

108MHz

87.5MHz

to

108MHz

(FTZ

approved)

2...

2.0nV

....

2,.5dB

....

More

than

70dB

_...

More

than

80dB

(98MHz)

....Mono:

Less

than

0.4%

(100%

Mod.)

Stereo:

Less

than

0.5%

(100%

Mod.)

.

...

Signal

strength

type

....

Switchable

to

ON-OFF

....+

More

than

40dB

(1kHz)

....

More

than

50dB

....

5Ou

sec.,

75

sec.

(FW

model

only)

....

Impedance

300Q

balanced

and

75Q

unbalanced.

....

525kHz

to

1,605kHz

2.

es

TOV

....

More

than

30dB

....

More

than

80dB

(1,000kHz)

....

More

than

70dB

....

More

than

50dB

....

Built-in,

Ferrite

Loopstick

Antenna

....

120V

60Hz

or

110V,

120V, 130V,

220V

and

240V.

(Switchable)

50

—60Hz

....

170W

(Max.)

.

oes

17-11/16in./450mm

(width)

5-11/16in./145mm

(height)

14-3/16in./360mm

(depth)

....

Without

package:

21Ib.

1302z/9.9kg

With

package:

26lb.

70z/12kg

....

FM

T-type

Antenna

1

Plugs

2

Speaker

Plugs

6

Polishing

cloth

1

Operating

Instructions

1

design

subject

to

possible

modification

without

notice

2.

FRONT

PANEL

FACILITIES

SPEAKERS

SWITCH

A

combination

of

the

power

on/off

switch

and

the

speaker

system

selector

switch.

;

POWER

OFF

....

The

equipment

is

dead.

Ai

aipemwced

Sound

comes

through

the

speaker

system

plugged

into

the

A

speaker

sockets.

SPKR

OFF.

..

No

sound

comes

from

any

speaker

system.

Useful

for

listening

through

headphones.

Boe

smatvieaecntee

Sound

comes

through

the

speaker

system

plugged

into

the

B

speaker

sockets,

Cais

thon

Oey

4

»..

Sound

comes

through

the

speaker

system

plugged

into

the

C

speaker

sockets.

APB

oc

Scere

Both

A

and

B

speaker

systems

are

energized.

At

Gv

enaes

Both

A

and

C

speaker

systems

are

energized.

PHONES

JACK.

Use

this

to

plug

in

stereo

headphones.

A

full

selection

of

high-performance

headphones

is

available

from

Pioneer.

BASS

&

TREBLE

CONTROLS

SIGNAL

METER

Meter

for

indicating

receiving

signal

strength.

STEREO

INDICATOR

This

indicator

will

light

up

when

the

broadcast

is

in

stereo.

{

STEREO

RECEIVER

MODEL

Sx-626

A

aM

om

PHONO

vc

aux

strAio

FM

FLAT

NORM

SPKR

OFF

Bg

Nera

eee

oars

FILTER

muTING

a

Contro!

bass

and

treble.

Turning

each

control

clockwise

from

the

FLAT

position

will

boost

the

tone,

and

turning

it

counterclockwise

will

diminish

the

tone.

FILTER

SWITCHES

LOW:

Setting

this

switch

to

ON

will

eliminate

low

frequency

noises,

‘such

as

record

rumble,

hum,

or

other

interference.

The

switch

is

normally

set

to

OFF

unless

the

filter

is

required.

HIGH:

=

Setting

this

switch

to

ON

will

eliminate

high

frequency

noises,

such

as

record

scratch,

hiss

static

noise

from

fluorescent

lamps,

or.

other

interference.

The

switch

is

normally

set

to

OFF

unless

the

filter

is

required.

FM

MUTING

SWITCH

This

switch

is

used

to

suppress

much

noise

between

FM

stations

while

tuning.

In

a

fringe

area,

however,

this

switch

should

be

kept

off

in

order

not

to

suppress

the

desired

station

signal

at

the

same

time.

BALANCE

CONTROL

This

control

balances

the

volume

of

the

left

and

right

speaker

systems.

Where

the

volume

from

the

right-hand

speakers

is

too

low,

turn

it

to

the

right

(clockwise),

Where

the

volume

from

the

left-hand

speakers

is

too

low,

turn

it

to

the

left

(counterclockwise).

These

switches

are

set

to

ON

for

test-listening

of

recording

in

progress

or

playback

of

recorded

tapes

with

tzipe

decks.

1—

This

switch

is

set

to

ON

for

using

a

tape

deck

plugged

into

TAPE

1

MON

jacks

and

TAPE

1

REC

jacks

or

TAPE

REC/P.B.

connector,

2—

This

switch

is

set

to

ON

for

using

a

tape

deck

plugged

into

TAPE

2

MON

jacks

and

TAPE

2

RECijacks.

NOTE:

For

a

normal

record

playback

or

listening

to

broadcasts,

leave

these

switches

set

to

the

OFF

position.

If

the

switches

are

set

to

ON,

sound

will

not

be

produced

from

spsakers.

5

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2

|

SPEAKERS

BASS

TREBLE

BALANCE

VOLUME

SELECTOR

LOUDNESS

TAPE

MODE

f—

FM

AUTO

MONITOR

STE

MONO

PHONO!

)

TUNING

KNOB

Used

to

select

desired

stations.

;

enn

ne.

4.

LOW

HIGH

{™%.

v4

=

\

=

4

2

REO

ay

@

Prone

q

6

PHONES

|

;

XY

Ms

QZ

a

Ne,

AUX

@®

nine

PUSH

ONT

Vert

|

RIGHT

min

|

MAX

PUSH

ON4

-=MDNO

@

MIC

JACK

Accepts

the

plug

of

the

microphone.

Use

a

high-impedance,

dynamic

microphone

with

a

standard

plug.

:

SELECTOR

SWITCH

i

This

switch

is

used

for

choosing

the

program

source.

:

AMi

veo.

3

eons

AM

reception.

:

FM

MONO..

FM

monophonic

reception

only.

FM

AUTO

..

FM

reception

by

automatic

switching

for

either

stereo

or

monophonic

program.

;

PHONO

1...

For

playing

records

on

a

turntable

plugged

into

the

VOLUME

CONTROL

————:

PHONO

1

jacks.

;

To

increase

the

volume,

turn

it

to

the

right

(clockwise).

PHONO

2...

Same

as

above,

for

PHONO

2

jacks.

|

MIG

26

wae

Microphone

sound

can

be

reproduced.

LOUDNESS

SWiITCH———_——

AUX

......

For

playing

signals

fed

to

the

AUX

jacks.

To

listen

to

quieter

sound,

set

this

to

the

ONposition.

This

emphasizes

MODE

SWITCH

the

low

and

high

notes,

For

normal

listening,

set

it

to

the

OFF

position.

P

|

STEREO:

When

set

to

STEREO,

stereo

sound

is

present.

TAPE

MONITOR

SWITCHES

q

and

2)

MONO:

When

set

to

MONO,

the

left

and

right

channel

signals

blend

into

monophonic

sound.

=P,

sin

sapneaneircnpemenetinire

att

:

SX-626

|

3.

CONNECTION

DIAGRAM

:

[—————

SPEAKERS

A

SPEAKERS

B

SPEAKERS

C

FM

OUTDOOR

ANTENNA

FM

T-TYPE

ANTENNA

[Pe

ad

Matt

a

ee

ea

a

AO

aa

eee

nae

7

3002

FEEDER

Dee

ere

te

eee

PROTECTION

FUSE

2A

75Q.

COAXIAL

a

AM

ANTENNA

CABLE

PROTECTION

FUSEAIM

FERRITE

ANTENNA,

F

me

@«

LEFT

75

UNBAL

3009

BAL

GND

|

=

©)

O}

CO)

@

©

ie

@

RIGHT

CES

5

dipeers

Connect

to

ground

termi-

nals

of

turntables,

tape

decks,

etc.

mm

TURNTABLE

..

)

L

R

oOL

r:

TAPE1;

=

TAPE2

5

~

AC

OUTLETS

—

ce

AUX

MON

REC

MON

REC

LIN

TAPE

REC/PB

SWITCHED

©

:

See

S

>

&

i,

oe

:

ach

ee

Sooue

:

out

i

ij

(|

PRE

&

MAIN

PLUGS

it

TURNTABLE

When

these

plugs

are

unplugged,

the

I

POWER

CORD

-

=

ras

1

OO

|

preamplifier

and

main

(power)

amplifier

=

:

L.

Aine

;

Saaees

&

!

;

is

jf

i

function

separately.

This

is

useful

fOr

eUSE

2A

AC

OUTLETS

eS

assembling

a

multi-amp

system

with

the

oov

det

5V

Aci

mode

aid

of

an

electronic

crossover

networks

a

2A

110V.

1A

220V

(Pioneer

SF-500,

SF-700,

for

example).

120V

240V

130V

i

LINE

INPUT

LINE

OUTPUT

CARTRIDGE

TAPE

PLAYER

'

{

I

1

\

‘

{

i

INPUT

Cm

O°

:

¢

OBO

O

Oe

|

With

the

4-channel

decoder

i

|

PIONEER

4-CHANNEL

l

|

amplifier

QL-600A

and

two

more

speakers

(separately

DECODER:

AMERIRIER

:

available),

a

4-channel

stereo

QL-600A

!

system

can

be

assembled

as

occ

@

ME

o---

ooe@

ME

e---

®

LS

A

TS

TAPE

DECK

TAPE

DECK

REAR

SPEAKERS

|

shown

in

this

illustration.

J)

oo

|

4.

BLOCK

DIAGRAM

MON

S

TAPE?

|

en

é—

MON

S

TAPE

1

4

REC

AUX

+»

PHONO

2

S

t=

PHONO

1

&

igh

t

<-

PHONO

2

c&

PHONO

1

Os.

—s

S249

8)

%po

EQUALIZER

AMP

ASS’Y

Ay

(W21-004)

AUX

S

é

o>

TAPE

1

Bee

x

—

MON

a

Tape

2

[

REC

g

L.

MON

©

I

Si:

POWER

S52

SELECTOR

$3

SPEAKERS

BD,

DIAL

SCALE

LAMPS

|

aa

TR

x

METER

DRIVE

ASS’Y

3

tM)

|

CAWM-050)

2

Yo

:

fo)

¥

{

°

1

fe}

x

Ww

|

SIGNAL

ea@

@

af]

I

|

DIAL

POINTER

3

|

o

|Se2

|

10/0

a

WA

|

{

:

|

eh

So

AUX

MIC

PHONO

FM_AM

i

SELECTOR

POSITION

|

Poe

|

Vad)

?

me

Wi

Da

De

|

Sill

Oy

y_

4

O—

||

POWER

SW

aE

STER

ICA

HH

-ro-OD—

Ho

5°

EO

INDIC

TOR

°°

ro}

eyuizer

|

ie

Sy

ba

7.

ms

HI

AC

LINE

2

set

TO.TUNER

ASS'Y

coe)

:

i

TO

MAIN

AMP

SWITCH

CIRCUIT

ASS

Ph

eee

ile

a

Neer

as

ace

CAWS-

01

oes

o

TOTUNER

AS

8M

POWER

SuePiy

GRourr

ASS’Y

SPEAKER

A

SPEAKER

B

‘CONTROL

—

Ss

MUTING

(FM)

POWER

AMP

ASS’Y

S4

TAPE

MON

1

OFF

'AMP

ASS’Y

=

S¢

LOW

CUT

(AWH-002)

SPEAKER

C

=

te

HON

2

OFF

(AWG-008)

Si?

HIGH

CUT

6

LOUDNESS

OFF

|

SWITCH

CIRCUIT

ASS’Y

Si

MODE MONO

|

CAWS-013)

HEADPHONES

st

remmp

SxX-626

5.

DISASSEMBLY

1.

Remove

4

screws

from

the

sides

of

the

wooden

case.

Pull

the

case

backward

off

from

the

receiver

housing.

2.

Pull

off

all

knobs,

then

remove

nuts

and

washers

from

shafts

and

remove

2

screws

from

top

of

front

panel.

The

front

panel

can

now

be

removed.

3.

The

bottom

plate

can

be

removed

after

loosening

the

7

screws.

6.

PARTS

AND

P.C.

BOARD

LOCATION

FERRITE

LOOPSTICK

ANTENNA

ATB-015-A

6.1

TOP

VIEW

KNOB

(SPEAKERS,

BASS,

TREBLE,

VOLUME,

FERRITE

LOOPSTICK

ANTENNA

BALANCE

AND

SELECTOR)

HOLDER

ASSEMBLY

AAB-007-C

AXB-001-0

FRONT

PANEL

ASSEMBLY

ANB-108-E

ELECTROLYTIC

CAPACITOR

ACH-011-A

TUNING

PULLEY

ASSEMBLY

ANB-093-F

TUNER

ASSEMBLY:

POWER

TRANSFORMER

AWE-031-0

ATT-040-B

(KUW)

ATT-072-B

(KCW)

ATT-041-E

(FVZW,

FW)

ATT-061-A

(NBW)

df

(2S

Tela

=

(Earr

D

C

KNOB

(TUNING)

AAA-004-B

oe)

mall

POWER

AMPLIFIER

ASSEMBLY

AWH-002-E

(KUW,

KCW,

FVZW,

FW)

TUNING

SHAFT

ASSEMBLY

AWH-013-B

(NBW)

AXA-032-0

FUSE

HOLDER

(PROTECTION)

CR

&

METER

DRIVE

ASSEMBLY

K96-007-C

(KUW,

KCW,

FVZW,

FW)

AWM-050-0

Ar

6.2

BOTTOM

VIEW

VARIABLE

RESISTOR

500k2-81

(VOLUME)

ACV-103-0

KNOB

(PUSH

BUTTONS)

AAD-023-0

ROTARY

SWITCH

(

SELECTOR)

ASB-036-0

;

SWITCH

CIRCUIT

ASSEMBLY

AWS-014-0

ROTARY

SWITCH

(SPEAKERS)

ASA-026-A

(KUW,

KCW)

ASA-015-A

(FVZW,

FW,

NBW)

VARIABLE

RESISTOR

500kQ-HB

(BALANCE)

ACV-104-0

CONTROL

AMPLIFIER

ASSEMBLY

AWG-008-A

SX-626

EQUALIZER

AMPLIFIER

ASSEMBLY

W21-004-B

PHONO

JACK

(6

JACKS)

AKB-007-0

POWER

SUPPLY

CIRCUIT

ASSEMBLY

AWR-029-A

ANTENNA

TERMINAL

BOARD

K11-043-D

—

SWITCH

CIRCUIT

ASSEMBLY

AWS-013-A

FUSE

HOLDER

(AC

POWER)

K96-007-C

(KUW)

AKR-006-0

(KCW)

AKR-001-0

(FVZW,

FW)

Ad

7.

ALIGNMENT PROCEDURE

7.1.

REQUIRED

MEASURING

_IN-

STRUMENTS

FM

signal

generator

MPX

signal

generator

AM

signal

generator

Voltmeter

Oscilloscope

Distortion

meter

7.2

AM

ADJUSTMENT

fet

2.

AN

jor)

~3

.

Tracking

Set

the

AM

signal

generator

for

400Hz

modulation

at

30%.

Connect

the

generator

output

to

the

AM

antenna

terminal

through

ai1kQ

dummy.

Connect

the

oscilloscope

and

voltmeter

in

parallel

to

TAPE

REC

jack.

Set

the

signal

generator

output

to

approxi-

mately

30dB.

Set

signal

generator

and

set

dials

to

600kHz.

Adjust

cores

of

T9

and

T10

(tuner

assembly)

and

the

bar

antenna

for

peak

output.

Set

signal

generator

and

set

dials

to

1,400kHz.

Adjust

TC5,

TC6

and

TC7

(tuner

assembly)

for

peak

output.

Repeat

steps

(3)

through

(6)

several

times,

to

obtain

optimum

tracking.

7.3.

FM

ADJUSTMENT

1.

2.

Tracking

Set

the

FM

signal

generator

for

400Hz

modulation

at

100%.

Connect

generator

output

to

the

FM

anten-

na

terminals

through

a

80092

balanced

dummy

antenna.

Connect

the

oscilloscope,

voltmeter

and

distortion

meter

in

parallel

across

TAPE

REC

jack.

TUNER

ASSEMBLY

10.

11.

.

Set

signal

.

Set

the

signal

generator

output

level

to

8~

10dB.

KCW,

KUW

and

NBW

models:

Set

the

signal

generator

and

set

dials

to

90MHz.

FW

and

FVZW

models:

Set

the

signal

generator

dial

to

87.4MHz,

and

set

dial

to

lower

and

(left

side)

.

Adjust

cores

of

T4

(tuner

assembly)

and

T1,

T2and

T3

to

obtain

peak

output.

generator

and

set

dials

to

106MHz.

.

Adjust

TC4

(tuner

assembly)

and

TC1,

TC2,

and

TC3

to

obtain

peak

output.

.

Repeat

steps

(3)

through

(6)

several

times,

to

obtain

optimum

tracking.

.

Set

the

frequency

to

90MHz

and

adjust

the

T5

core

of

the

tuner

assembly

to

obtain

peak

output.

.

Detune

the

set

so

that

noise

only

is

received.

Adjust

the

primary

(bottom)

core

of

T6

so

that

OV

reading

between

terminals

6

and

7

on

the

tuner

assembly.

Set

signal

generator

and

set

dials

to

98MHz.

Set

signal

generator

output

level

to

60dB.

Carefully

tune

the

set

to

this

frequency.

Adjust

the

secondary

(top)

core

of

T6

(tuner

assembly)

for

minimum

distortion.

FM

MPX

adjustment

.

Set

MPX

signal

generator

modulation

for

the

main

signal

(L+R)

to

1kHz

at

67.5kHz

deviation

and

for

the

pilot

(19kHz)

at

7.5kHz

deviation.

Set

the

output

level

to

60GB.

.

Apply

signal

generator

modulation

to

the

left

channel

only.

Adjust

T8

(tuner

output.

assembly)

for

peak

.

Under

this

condition,

adjust

the

core

of

T5

(tuner

assembly)

for

minimum

distortion.

Set

signal

generator

modulation

to

the

pilot

and

L(R).

Adjust

VR1

(tuner

assembly)

to

obtain

maximum

channel

separation.

8.

DIAL

CORD

STRINGING

a)

Set

the

tuning

capacitor

to

mmimum

capac-

itance.

b)

Tie

one

end

of

the

string

to

tuning

pulley.

c)

Pull

the

string

around

the

pulleys

A,

B,

C

and

D,

then

wind

3

turns

around

the

tuning

d)

Lead

the

string

around

the

pulleys

E

and

F.

e)

Finally,

tie

the

end

of

the

string

to

spring

on

the

tuning

pulley.

f)

Tune

receiver

to

low

end.

Fasten

dial

pointer

to

string

so

that

it

indicates

low

end

on

dial

scale.

PULLEY

B

PULLEY

A

DIAL

POINTER

SX-626

PULLEY

C

TUNING

SHAFT

AS

9.

PACKING

METHOD

AND

PART

NUMBERS

STYROTECTOR

AHA-007-0

SX-626

~STYROTECTOR

AHA-007-0

PACKING

CASE

KCW

AHD-082-A

KUW

AH

D-057-B

FVZW

=

AHD-058-A

NBW

AHD-086-A

FW

AHD-081-A

10.

EXPLODED

VIEW

AND

PARTS

LIST

Parts

List

of

Exploded

View

NOTICE:

Any

parts

asterisked

(*)

are

subject

to

being

not

supplied.

[rerse

[emo]

is

Lamp

cover

:

ANH-140-0

Pitot

lamp

socket

K91-005-A

Pilot

lamp

8V,

0.3A

(meter)

E22-017-0

Signal

meter

AAW-005-0

Dial

pointer

assembly

AAF-007-C

Dial

scale

AAG-057-0

Dial

scale-held

metal

ANF-020-B

Lamp

board

assembly

AWX-010-A

Pilot

lamp

8V,

0.3A

(dial

scale)

E22-017-0

Pilot

lamp

6V,

30mA

(stereo

indicator)

AEL-006-0

AG

Key

No.

Description

11*

+

Lamp

box

12*

Wire

clip

13

Terminal

strip

(2P)

Terminal

strip

(2P)

14*

Pulley

shaft

15*

Pulley

16*

Pulley-held

metal

17

AC

socket-held

metal

18

AC

socket

AC

socket

19

Terminal

strip

(1L2P)

20

Tuning

pulley

assembly

21

Tuner

assembly

22*

Sub-chassis-B

23*

Sub-chassis-A

24

Power

transformer

Power

transformer

Power

transformer

Power

transformer

25

Ground

terminal

strip

(2P)

26

Electrolytic

capacitor

3,300uF,

63V

27

CR

&

meter

drive

assembly

28*

P.C.

board

holder

P.C.

boird

holder

29

Antenna

terminal

board

30*

Wire

holder

31*

Model

name

plate

Model

name

plate

Model

name

plate

32

AC

cord

grommet

33

Ground

terminal

strip

(2P}

34

AC

power

cord

AC

power

cord

AC

power

cord

AC

power

cord

35*

Adaptor

(fuse

holder)

36

Fuse

hoider

(AC

power)

Fuse

holder

(AC

power)

Fuse

holder

(AC

power)

37

Ferrite

loopstick

antenna

38

Fuse

holder

(Protection)

39

Ferrite

loopstick

antenna

holder

assembly

40

Connector

(DIN

type

5p)

41

Washer

42

Screw

M4x15

43

Wooden

case

44*

Cover

(power

amplifier)

45

Power

amplifier

assembly

Power

amplifier-assembly

46

Power

amplifier-held

metal

47*

Rear

panel

Rear

panel

Rear

panel

48

Speaker

output

terminal

49

Tuning

shaft

assembly

50*

Bottom

plate

Part

No.

AEC-014-A

AEC-004-0

AKC-015-0

K13-043-A

M49-025-E

AEC-006-0

ANG-091-0

M49-127-A

AKP-002-0

K82-012-A

AKC-018-0

AXA-015-A

AWE-031-0

ANA-054-0

ANA-053-0

ATT-040-B

ATT-072-B

ATT-041-E

ATT-061-A

K13-048-0

ACH-011-A

AWM-050-0

AEB-019-0

B21-008-A

K11-043-D

M45-105-C

AAL-047-A

AAL-048-A

ABL-069-0

AEC-079-0

K13-048-0

D11-003-E

D11-002-B

ADG-004-0

D54-019-0

K96-007-C

AKR-006-0

AKR-001-0

K96-007-C

AXB-001-0

K93-003-B

B21-011-0

ABA-010-A

AMM-006-C

ANH-131-0

AWH-002-E

AWH-013-B

ANF-017-0

ANC-032-E

ANC-027-H

ANC-042-D

K72-028-0

AXA-032-0

ANE-008-D

SX-626

KUW

KCW,

FVZW,

FW,

NBW

KUW,

KCW,

FVZW,

FW

KUW,

KCW,

FW

FVZW

KUW

KCW

FVZW,

FW

NBW

KUW

KCW,

FW,

FVZW,

NNW

KUW,

KCW

FW,

FVZW

NBW

KUW,

KCW

FW

FVZW

NBW

KUW

KCW

FVZW,

FW

KUW,

KCW,

FVZW,

FW

KUW,

KCW,

FVZW,

FW

NBW

KUW,

KCW

FVZW,

FW

NBW

A?

Ag

NOTICE:

Any

parts

asterisked

(*)

are

subject

to

being

not

supplied.

rs

a

Pully

shaft

Pulley

Pulley-eld

metal

Chassis

Pulley-held

metal

Pulley

shaft

Ground

terminal

strip

(2P)

Shield

plate

(1)

Rotary

switch

Wire

clip

Phone

jack

(Microphone)

Switch-held

metal

Ground

terminal

strip

(2P)

Shield

plate

(2)

Phone

jack-A

(6

jacks)

P.C.

board

holder

P.C.

board

holder

Equalizer

amplifier

assembly

P.C.

board

holder

P.C.

board

holder

Switch

assembly

Control

amplifier-held

metal

P.C.

board

holder

P.C,

board

holder

Control

amplifier

assembly

P.C.

board

holder

P.C.

board

holder

Power

supply

circuit

assembly

Wire

clip

(B)

Variable

resistor

500k-B1

(Volume)

Variable

resistor

500k-HB

(Balance)

Shield

plate

P.C,

board

holder

P.C.

board

holder

Switch

assembly

Wire

clip

(B)

Phone

jack

(Headphones)

Terminal

strip

(1L4P)

Rotary

switch

(Speakers)

Rotary

switch

(Speakers)

Sub-panel

assembly

Front

panel

assembly

Knob

(Speakers,

Bass,

Treble}

Knob

(push

switch)

Knob

(Balance,

Volume)

Knob

(push

switch)

Knob

(Tuning)

Knob

(Selector)

M49-025-E

AEC-006-0

ANG-091-0

ANA-012-J

ANG-091-0

AEC-006-0

M49-025-E

K13-048-0

ANH-044-A

ASB-036-0

AEC-004-0

K72-024-0

ANF-019-A

K13-048-0

ANH-045-A

AKB-007-0

AEB-019-0

B21-008-A

W21-004-B

AEB-019-0

B21-008-A

AWS-014-0

ANF-018-0

AEB-019-0

B21-008-A

AWG-008-A

AEB-019-0

B21-008-A

AWR-029-A

AEC-005-0

ACV-103-0

ACV-104-0

ANH-139-A

AEB-019-0

B21-008-A

AWS-013-A

AEC-005-0

K72-026-0

K13-026-A

ASA-026-A

ASA-015-A

AND-016-H

ANB-108-E

AAB-007-C

AAD-023-0

AAB-007-C

AAD-023-0

AAA-004-B

AAB-007-C

KUW

KCW,

FW,

FVZW,

NBW

KUW

KCW,

FW,

FVZW,

NBW

KUW

KCW,

FW,

FVZW,

NBW

KUW

KCW,

FW,

FVZW,

NBW

KUW

KCW,

FW,

FVZW,

NBW

KUW,

KCW,

FVZW

KUW,

KCW

FW,

FVZW,

NBW

SX-626

Exploded

View

proce

YAN

on)

9

bf

XS

;

\

\-%

o

\

3

€,

nae.

es

11.

SCHEMATIC

DIAGRAMS,

P.C.

BOARD

PATTERNS

AND

PARTS

LIST

11.1

CIRCUIT

CONNECTION

D

be

Faigt

YELLOW

~"Q8SK45

Tn.

BrASC5RE

IAGRAM

AND

MISCELLANEOUS

PARTS

|

TUNER

Assy

AWE-

031

ars

QsHA1201

Ris

6)

sy

tiv,

Fe

7

TAY,

Tee

Vy

2P22V,

\

UnaALancen}

@

rr

switch(S4)

nor

capacitors

(C&C

yy)

are

provided

for

FIZ-approved

unit.

@No

switch(S,)

is

provided

for

120V

unit,

but

capacitors

(Cy&Cis)

are

provided.

CR&

METER

ORIV!

‘AWM

~050

ce

assy

POWER

SUPPLY

CIRCUIT

ASs'y

AWR-028

acasy

4a

a,

28D313P

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FR

1)

SWITCHES

ARE

SHOWN

AT

THE

FIRST

POSITION

2)”

ViSKNAL

VOLTAGE

MECESSARY

FOR

OBTAINING

20W/80

OUTPUT

POWER

<IhHE),

4:06

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CEREOS

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PowER,

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SELECTOR

POWER

SWITCH

(Dic

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Power

1AM

SPEAKER

SELECTOR

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2)

8

Mow

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OFF

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OFM

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UMLESS

OTHERWISE

NOTED.

KiKO

MMO

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2

2)

SPEAKER

OFF

6

we

41

SPEAKER

B

‘capacitors

3)

aux

3h

SPEAKER

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1

pF

UNLESS

OTHERVOSE

NOTED.

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pF.

24

7)

SPEAKER

A+G

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VA,

500K

By

18188

wt

R560

hw

Rig

380

WW

wovA,

SOK

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AC

UNSWITCHEO

POWER

AMP

Assy

|,

AWH-

002

R150

+6:

280983

91,0:

2SK30A

x2

030428725

x2

AWN

2280783

2

On

280783

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3

spa]

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jie

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|

on

3

F3

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14

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CH

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|

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8

s

60H:

a

5

Rov

22/25

58

3

-

S|

‘The

estorisked

fuses

are

used

for

CSA-epproved

mode!

only

SPEAKERS

A

SPEAKERS

B

SPEAKERS

©

HOV,

(20V,

1204

2260,

240¥

HEAD-PHONE

{

Miscellaneous

Parts

CAPACITORS

RESISTORS

SX-626

@

CAPACITORS:

IN

uF

UNLESS

OTHERWISE

NOTED

_

p:

pF

e

RESISTORS:

IN

2,

%W

UNLESS

OTHERWISE

NOTED

k:

kQ,M:

MQ

Description

Electrolytic

220

Electrolytic

3,300

Metallized

mylar

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Ceramic

0.01

Mylar

0.0082

Mytar

0.0082

Part

No.

CEB

221P

10

ACH-011-A

ACE-002-0

ACG-003-0

ACG-001-0

ACG-002-0

ACG-001-0

CKDYF

103Z

50

CKDYF

103Z

50

CKDYF

103Z

50

ACG-002-0

ACG-001-0

ACG-002-0

ACG-001-0

COMA

822J

50

COMA

822J

50

KUW

KCW

FVZW,

FW

KUW,

FVZW,

FW

KCW

FVZW,

FW

KCW,

KUW

FVZW,

FW,

NBW

KCW,

KUW

FV2W,

FW,

NBW

KUW,

KCW,

FW

KUW,

KCW,

FW

R3

R4

RS

RG

R7

R8

RQ

R10

R11

R12

R13

R14

R15

R16

VRi

VR2

Carbon

film

150k

Carbon

film

150k

Carbon

film

150k

Carbon

film

150k

Wire

wound

10

5W

Wire

wound

10

5W

Wire

wound

150

3W

Wire

wound

150

SW

Carbon

film

2.2M

*AW

Carbon

film

22

wW

Carbon

film

18k

Carbon

film

3.9k

Carbon

film

3.9k

Carbon

film

1M

Variable

resistor

SOOk-HB_

(Balance)

Variable

resistor

500k-B1

(Volume)

COIL

AND

TRANSFORMERS

Description

RD%PS

154J

RD%PS

154J

RD%PS

154J

RD%PS

154J

RT5B

100K

RT5B

100K

RT3B

151K

RT3B

151K

RDY%PW

225J

RD*%PS

220J

RD*%PS

183J

RD%PS

392J

RD%PS

392J

RD*%PS

105J

ACV-104-0

ACV-103-0

RF

choke

coil

Ferrite

loopstick

antenna

Power

transformer

Power

transformer

Power

transformer

Power

transformer

Balun

T24-028-A

ATB-015-A

ATT-040-B

ATT-072-B

ATT-041-E

ATT-061-A

T22-025-A

KUW,

KCW

KUW,

KCW

KUW

KCW

FVZW,

FW

NBW

Continued

on

the

23

SWITCHES

Description

Part

No.

Rotary

switch

(Selector)

ASB-036-0

ASA-026-A

ASA-015-A

$41-022-A

Rotary

switch

(Speakers)

Rotary

switch

(Speakers)

Slide

switch

(De-emphasis)

KUW,

KCW

FV2ZW,

FW,

NBW

FW

OTHERS

Description

Tuner

assembly

AWE-031-0

Equalizer

amplifier

assembly

W21-004-B

Controi

amplifier

assembly

AWG-008-A

Power

amplifier

assembly

AWH-002-E

Power

amplifier

assembly

AWH-013-B

Switch

circuit

assembly

AWS-013-A

Switch

circuit

assembly

AWS-014-0

CR

&

meter

drive

assembly

AWM-050-0

Power

supply

circuit

assembly

AWR-029-A

Lamp

board

assembly

AWX-010-A

Front

panel

assembly

ANB-108-E

AMM-006-C

AAF-007-C

AAW-005-0

AAD-023-0

Wooden

case

Dial

pointer

assembly

Signal

meter

Knob

(push

bottons)

Knob

(Speakers,

Bass,

Treble,

Volume,

Balance

and

Selector)

Knob

(Tuning)

AAA-004-B

Dial

scale

AAG-057-0

Phono

jack-A

(6

jacks)

AKB-007-0

Antenna

terminal

board

K11-043-D

Jumper

plug

(for

phono

jack)

AKM-005-0

AEL-007-0

Pilot

lamp

8V,50mA

(program

indicator)

AAB-007-C

2y

Pilot

lamp

8V,

0.3A

(dial

scale)

E22-017-0

Pilot

lamp

6V,30mA

(Stereo

indicator)

AEL-006-0

Fuse

2A

(AC

power)

E21-027-0

Fuse

1A

(AC

power)

E21-004-0

Fuse

3A

(protection)

Fuse

2A

(protection)

Fuse

3A

(protection)

Fuse

A

(protection)

Fuse

2A

(protection)

Fuse

0.5A

(protection)

Fuse

1A

(protection)

Fuse

5A

(protection)

Compound

part

for

REC

jack

AC

socket

AC

socket

Speaker

output

terminal

Phone

jack

(Headphones)

Phone

jack

(Microphone)

Fuse

holder

AEK-008-0

E21-035-A

E21-022-0

E21-019-A

E21-029-A

AEK-014-0

E21-031-0

AEK-015-0

W52-004-0

AKP-002-0

K82-012-A

K72-028-0

K72-026-0

K72-024-0

K92-005-A

Miscellaneous

Parts

+

KUW,

KCW,

FV2ZW,

FW

NBW

KUW,

KCW

FVZW,

FW

KUW,

KCW

KUW,

KCW

KCW,

FVZW,

FW

KCW,

FVZW,

FW

NBW

KUW,

KCW,

FW

FVZW

Connector

Fuse

holder

Fuse

holder

Fuse

holder

Fuse

holder

Description

(DIN

type

5P)

(AC

power

and

Protection)

(AC

power)

(AC

power)

(Protection)

FM

T-type

antenna

Fuse

2A

(AC

power)

Speaker

plug

Polishing

cloth

Packing

case

Packing

case

Packing

case

Packing

case

Packing

case

AC

power

cord

AC

power

cord

AC

power

cord

AC

power

cord

Operating

instructions

Operating

instructions

Binding

post

(for

ground)

K93-003-B

K96-007-C

AKR-006-0

AKR-001-0

K91-008-0

D52-013-0

E21-005-0

K72-007-B

£33-009-B

AHD-057-B

AHD-082-A

AHD-058-A

AHD-081-A

AHD-086-A

D11-003-E

ADG-004-0

D11-002-B

D54-019-0

ARB-044-E

ARB-053-A

B11-012-A

Miscellaneous

Parts

SxX-626

KUW,

KCW,

FVZW,

FW

KCW

FVZW,

FW

NBW

FVZW,

FW

KUW,

FVZW,

FW,

NBW

KUW

KCW

FVZW

FW

NBW

KUW,

KCW

FVZW

FW

NBW

KUW,

KCW,

FVZW,

FW

NBW

25

Pioneer SX-626 KCW User manual

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