Technics St-ch505 User manual

Service

Manu

~~

Tuner/Sound

Processor

SL-CH505

Remote

Control

Transmitter,

\

SB-CH404

RS-CH404

SE-CH404

Because

of

unique

interconnecting

cables,

when

a

component

requires

service,

send

or

bring

in

the

entire

system.

M

Specifications

@

Pre-amplifier

section

Input

sensitivity/impedance

PHONO

for

(E)

(EG)

areas

2.5

mV/47

kQ

AUX

for

(GN)

area

250

mV/15

kQ

DCC

250

mV/15

kQ

Output

level

DCC

RECOUT

150

mV/1.5

kQ

Frequency

response

PHONO

for

(E)

(EG)

areas

30

Hz—15

kHz/+1.5

to

-2.0

dB

AUX

for

(GN)

area

30

Hz—20

kHz

DCC

30

Hz—20

kHz

m@

EQ,

SFP

section

Center

frequency

80,

250,

1

k,

4k,

12.5

k(Hz)

Fixed

mode

SPACE

3

modes

(DISCO,

LIVE,

HALL)

GEQ

5

modes

(HEAVY,

CLEAR,

SOFT,

CAR,

HP

ST)

@

FMtuner

section

Frequency

range

87.50—108.00

MHz

(0.05

MHz

steps)

Sensitivity

1.8

pV

(IHF

usable)

S/N

26

dB

1.5

pV

(750)

S/N

MONO

70

dB

(75

dB,

IHF)

Stereo

separation

1

kHz

35

dB

Antenna

terminal(s)

75Q

(unbalance)

SC-CH404

ST-CH505

SL-CH505

‘Technics

ST-CH505

SB-CH404

Compact

disc

player

Amplifier

Cassette

deck

SE-CH404

RS-CH404

ORDER

NO.

AD9307219C8"

al

Tuner

ST-CH505

Colour

(K)

....

Black

Type

Areas

Suffix

for

Model

No.

(E)

(EG)

Germany

and

Italy

System:

SC-CH404

Colour

Europe

@

AM

tuner

section

Frequency

range

522—1611

kHz(9

KHz

step)

530-1620

kHz

(10

KHz

step)

LW

144-288

kHz

(9

KHz

step)

Sensitivity

(S/N

20

dB)

MW

500

pV/m

LW

50

pV

Hi

Timer

section

Clock

Quartz-lock

type

Function

24-hour

programmable;

Play

timer

(1

time),

Rec

tiner

(1

time),

Sleep

(120

min,

1

min

intervals)

Setting

1

minute—23

hours

59

minutes

:

(1

mn,

intervals)

@

General

Dimensions

(WxHxD)

270X8&9

x

274

mm

Weight

1.75

kg

Notes:

1.

Weights

and

dimensions

shown

are

approximate.

2.

Design

and

specifications

are

subject

tochange

without

notice.

SB-CH4i4

“(E)

(EG

areas

“(GN)

asa

*Macie

in

PAES

“Wade

in

NABEL

ST-CH505

m@

Contents

Page

@LOCATION

OF

CONTROLS

.............

00

0eeeee

eee

anaes

2

eWIRING

CONNECTION

DIAGRAM

..............--..-05.

18

@SETTING

THE

TIME

0.000.000

ccc

cc

ccc

eee

e

eect

eee

anes

3

@BLOCK

DIAGRAM.........000

0000.

c

cece

cee

ee

eee

ees

19~21

@DISASSEMBLY

INSTRUCTIONS

.........

atthe

hdc

ohda’

4~6

_

FUNCTION

OF

IC

TERMINALS

.............0.00-.0000

00:

22

ePOWER

SUPPLY

WITH

TUNER

ST-CH505..................

6

@REPLACEMENT

PARTSLIST

............20000-0-00

23~27

@SCHEMATIC

DIAGRAM

2.0.0.0...

ccc

cece

ees

7~14

@CABINET

PARTS

LOCATION

....0.........0000eeceeee

ees

28

@PRINTED

CIRCUIT

BOARD

DIAGRAM.

...............

15~18

NOTE:

Refer

to

the

service

manual

for

Model

No.

SE-CH404

(Order

No.

AD9307218C8)

for

information

on

“ACCESSORIES”,

“STACKING

THE

COMPONENTS”,

“CONNECTIONS”

and

“PACKAGING”.

H

Location

of

Controls

The

functions

indicated

by

the

numbers

with

black

background

(for

example

@)

can

also

be

activated

from

the

remote

control.

R

imer

button

(J

REC

Scord

ner

orven

(Ree

@

Clock/timer

button

(CLOCK/TIMER)

No.

Name

No.

Name

a

External

source

input

select

button

@)

Play

timer

button

(({]

PLAY)

(EXT)

V.bass

button

(V.BASS)

@)

Internal

source

input

select

button

(INT)

-

©)

Voice

mute

button

(KARAOKE)

©

Tuner

source/band

select

button

and

indicator

(TUNER/BAND)

®

EQ/SPACE

mode

ON/FLAT

button

(ON/FLAT)

(4)

Multi-control

buttons

MULTI

CONTROL

@

EQ/SPACE

mode

select

button

(

)

(MODE)

©

Remote

control

signal

sensor

(SENSOR)

@

Setting

the

Time

CLOCK/

zZ

ST-CH505

—

3~5

TIMER

O+@)

(Pe

*@)

These

instructions

explain

how

to

set

the

timer

for

16:25

(4:25

p.m.)

on

Wednesday.

Switch

on

the

power

on

the

amplifier.

@

Press

CLOCK/TIMER

to

se-

lect

“CLOCK”.

within

7

seconds:

@

Press

SET.

@

Press

<

or

P

to

select

“WED”.

“416”.

@

Press

SET.

ny

“95”,

MULTI

CONTROL

¢

“Le

setect

SET®

@

Press

SET

to

finish

setting

the

time.

The

display

will

retum

to

the

after

about

2

seconds.

When

“E:”

appears

on

the

display:

It

appears

when

you

connect

the

power

supply

cord

for

the

first

time

or

if

there

has

been

a

power

failure.

If

this

happens,

reset

the

time.

If

the

minutes

setting

has

gone

wrong:

1.

Press

CLOCK/TIMER.

2.

Press

SET

3

times.

3.

Press

one

of

SELECT

to

set

the

minute,

and

then

press

SET.

For

your

reference:

To

display

the

clock

again:

Press

CLOCK/TIMER.

The

clock

display

will

appear

for

about

5

seconds.

ST

A

ig

i

st

a

cri

dan

hss

bass

ib

ide

ts

abitar

Diese

sales;

tabbed

ade

centainaess-

ST-CH505

mw

Disassembly

Instructions

“ATTENTION

SERVICER”

Some

chassis

components

may

have

sharp

edges.

Be

careful

when

disassembling

and

servicing.

ee

"Removal

of

the

Cabinet

ee

Removal

of

the

Front

Panel

Ass’y

Procedure

152

Cabinet

Front

panel

ass'y

4

1.

Remove

the

5

screws

(Q@~@).

1.

Remove

the

2

screws

(@,

@).

2.

Remove

the

cabinet

in

the

direction

of

arrow.

2.

Remove

the

front

panel

ass’y

in

the

direction

of

arrow.

Procedure

12-3

14

Bottom

board

()

ass'y

Projection

1.

Remove

the

8

screws

(Q@~Q).

2.

Pull

the

rear

panel

in

both

directions

of

arrow

©

to

unlock

it

from

the

projection

of

the

bottom

board

ass’y.

3.

Remove

the

rear

panel

in

the

direction

of

arrow

@.

Ey

Removal

of

the

Connection

(1)

P.C.B.,

Connection

(2)

P.C.B.

and

Tuner

P.C.B.

Connection

(1)

P.C.B.

14-5

=

A

“ia

ZN

Connection

(2)

P.C.B.

e

Remove

the

7

screws

(@)~@).

1.

Release

the

1

claw.

2.

Lift

up

the

tuner

P.C.B.

in

the

direction

of

arrow

@,

and

3.

Remove

the

connection

(1)

P.C.B.

and

connection

(2)

then

remove

the

2

connectors

(CN201A/B,

CN202A/B).

P.C.B.

in

the

direction

of

arrow

@.

ST-CH505

Procedure

—

1-24-56

e

Remove

the

5

screws

(@~@).

nee:

How

to

check

the

Main

P.C.B.

Procedure

13247

Tuner

P.C.B.

Rear

panel

Main

P.C.B.

1.

Remove

the

5

screws

(Q@~@).

4.

Reinstall

the

rear

panel

to

the

main

P.C.B.

and

tuier

2.

Release

the

1

claw.

P.C.B.

and

then

tighten

6

screws

(@~@).

3.

Remove

the

main

P.C.B.

and

tuner

P.C.B.

:

Front

panel

ass'y

Main

PC.

B.

Main

P.C.B.

(Foil

side)

5.

Reinstall

the

front

panel

ass'y

to

the

main

P.C.B.

6.

Check

the

main

P.C.B.

(foil

side)

as

shown

above

ST-CH505

Replacement

of

the

Foot.

1.

Remove

the

4

heat

melted

posts

on

the

bottom

board

ass'y

witha

pair

of

nippers

or

similar

tool.

2.

To

replace

the

foot

(RKA001

1A-2)

on

the

bottom

board

ass'y,

melt

the

4

posts

with

a

soldering

iron.

Ete

5

es

Heat

meited

posts

Foot

Bottom

board

assy

Soldering

iron

Foot

(RKAO011A-2)

@

Power

Supply

with

Tuner

ST-CH505

Power

Supply

to

Main

PCB

1.

Apply

11

V

AC

power

between

C901

and

C902

using

the

service

tool

for

AC

power

supply

as

shown

below.

(The

unit

comes

to

STAND

BY

Mode.)

2.

Short

the

point

[P-sw]to

the

cathode

side

of

diode

D908

as

shown

below.

FL

display

tube

lights

and

the

unit

comes

to

power

ON

mode.

Power

Supply

to

Tuner

PCB

1.

Apply

15

V

DC

power

to

[J912Jand

using

the

service

tool

for

DC

power

supply

as

shown

below.

Note:

When

applying

DC

power,

connect

between

GND

and[CT]using

the

tool.

CNSO!IA

CN8O02A

CNSO3A

(J716)

SHORT

:

POWER

"ON"

(Main

P.C.B.)

DC

POWER

SUPPLY

a

7

ST-CH505

H

7

.

:

AM

(LW/MW)

si

Ii

:

i

@

Schematic

Diagram

eTuner

circuit

(parts

tist

on

pages

23~27)

ee

AE

WW)

aloralline

——)

+

FM

atonal

ine

25>

:

AM

(LW/MW)

OSC

signal

line

ooo

:

FM

OSC

signal

line

Positive

voltage

line

AF

signal

line

1

2

3

4

5 6

7

8

9

10

@\Indicated

voltage

values

are

the

standard

values

for

the

unit

measured

by

the

DC

electronic

circuit

tester

(high-impedance)

with

the

chassis

taken

as

standard.

Therefore,

there

may

exist

some

errors

in

the

voltage

values,

depending

on

the

internal

impedance

of

the

DC

circuit

tester.

No

mark:

FM

mode

(

):

MW

mode

ce

>:

LWmode

EQ

tuner

circuit

For

(£G)

area.

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voltage

values

are

the

standard

values

for

the

unit

measured

by

the

DC

electronic

circuit

tester

(high-

impedance)

with

the

chassis

taken

as

standard.

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there

may

exist

some

errors

in

the

voltage

values,

depending

on

the

internal

impedance

of

the

DC

circuit

tester.

No

mark.

FM

mode

(

mode

<

):

MW

>:

LW

mode

®|mportant

safety

notice:

Components

identified

by

A

mark

have

special

characteristics

important

for

safety.

Furthermore,

special

parts

which

have

purposes

of

fire-

retardant

(resistors),

high-quality

sound

(capacitors),

low-

noise

(resistors),

etc.

are

used.

When

replacing

any

of

components,

be

sure

to

use

only

manufacturer's

specified

parts

shown

in

the

parts

list.

Caution!

IC

and

LSI

are

sensitive

to

static

electricity.

Secondary

trouble

can

be

prevented

by

taking

care

during

repair.

Cover

the

parts

boxes

made

of

plastics

with

aluminum

foil.

Ground

the

soldering

iron.

Put

a

conductive

mat

on

the

work

table.

Do

not

touch

the

legs

of

IC

or

LSI

with

the

fingers

directly.

This

schematic

diagram

may

be

modified

at

time

with

the

development

of

new

technology.

©The

supply

part

number

is

described

alone

in

the

replacement

parts

list.

Ref.

No.

Production

Parts

No.

Supply

Parts

No.

1C6014

BA4558FT1

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2801

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RCDHC-278

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23~27)

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408

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control

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BUS

LINE

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2

184

5

CLK

OUT

M38173M6245F

---.

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EG)

=

16h

JK

2031/2)

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CLK

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48.

DATA

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808-813,

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|

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ST-CH505

Lc72is

NJUT3ISMT2

MIX

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MPX

INPUT

SELECTOR

Notes:

1)

(

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No.

of

——

xd)

-

[Ren]

910710108)

ales

7,

[|

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|

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|

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OSC

SIGNAL

|

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ANG6SS8SFE2

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(LW/MW)

SIGNAL

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ave

Tee

Fic251

|

A4SS6FTI

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trig

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OUT

SIGNAL

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(0602)

DAT/DCC

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12,9,6,3,100,97

(19,22,25,28,34),

11,8,5,2,99,96

(20,23

126,29,32)h

10,7,4,1,98

24,27,3

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|

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control

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204

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eas

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pros

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[muting

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|

muting

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040110402)

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control

'

MUTING

control

|

MUTING

contro!

L

|

MUTING

M38

173M6252F

----

(GN)

td

|

M36173M6245F---

(E,

EG)

0

amuTe

6

A

9}

vor.

SYSTEM

CONTROL

/FL

DRIVE

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OR

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JOG

8

8S

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DATA

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ie

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SW

CHECK

&

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E

2)

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|

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+8

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PT

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ee

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OUT

QBit-813

9807

814

(TUNE

M/BAND)

9905,

0916

o91s

Regulator

0903,0991

Regulotor

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8]

zsol

(REMOTE

SENSOR)

$801-

8604,

808-813,

$815-6819

Fu

OISPLAY

0901,0905

0901-904

|

Reguiotor

|

Regulator

Q902,0906

FLBO!

@

-20-

-21-

ST-CH505

@

Functions

of IC

Terminals

©1C801

(M38173M6245F)

for

(E)

(EG)

areas/(M38173M6252F)

for

(GN)

area

Terminal

1

GR

re)

Condensor/resistance

oscillation

terminal

for

fs

|

oro

|

Input

for

remote

control

TIMER

an

electronic

failure

detection

ACIN

AC

power

source

input

terminal

for

an

KEY2

i

Operation

(MULT|

CONTROL)

key

signal

electricity

failure/clock

input

/RESET

|

Reset

input

terminal

KEY1

|

Operation

key

signal

input

Power

source

for

pull

up

ISD

i

|

SD

signal

input

for

tuner

Oy.

1

|

(stow

/STEREO

|

STEREO

signal

input

for

tuner

fa]

|

_

—

STB&LATCH|

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Latch

penal

ootpunte

Mace

IE!)

ane

|

20

|

an

Connected

to

a

seramic

oscillator

jor

system

strobe

signal

output

to

NJU7313

(IC201)

clock

X801

(4.194304

MHz)

31

XOUT

ie)

:

CE

fe)

Chip

enable

signal

output

to

LC7218

(1C

102)

32

Vss

_

Connected

to

GND

CLK

0

Clock

signal

output

to

M62408

(1C301)/

NJU7313

(1C201)/LC7218

(IC

102)

Input

for

MIC

detection

33

MIC

DET

|

,

ay

(Connection:

“L”)

DATA

oO

Data

signal

output

to

M62408

(IC301)/

NJU7313(1IC201)/LC7218

(iC

102)

34

CSi

|

Input

for

chip

selection

DATAIN

{

Data

signal

input

from

LC7218

(IC

102)

|

as

|

CSO

Audio

muting

signal

output

36

/G6

AMUTE

9°

(Volume

of

—10

dB

and

less:

“H”)

t

i

e)

Grid

output

for

FL

display

tube

40

/G10

MUTE

ie)

Main

muting

signal

output

(Normally

“L”)

41

$31

,

13

CLK2

O

|

Serial

clock

output

for

M62408

(IC301)

; ;

Gp

||

Spament

OutpUrter

EE

cisplay

up

56

S16

(Tuner/Amplifier)

DATA2

ie)

Serial

data

output

for

M62408

(IC301)

57

$15

'

B.DATAIN

|

1

|

Data

input

from

bus

;

’

>

|

agent

cutput

for

FE

display

subs

(GEQ)

71

$1

B.CLK

IN

Clock

input

from

bus

72

/G1

e)

Grid

output

for

FL

display

tube

47

|BoATAOUT|

oO

Data

putpet

to

bus

(Normally

“H")

73

Voo

'

5

Vimpression

BUCK-UP

+5

V

impressiot

Clock

output

to

bus

ppg

|

(Normally

“L")

vP

su

—VP

impression

for

FL

dispiay

tubs

POWER

ON

mode:

Output

for

SUR

ON/

D-GNO

—

Connected

to

GND

CHECK

&

OFF

(During

POWER

ON:

“H")

SURR

POWER

OFF

mode:

Demultipter

output

for

76

VREF

=

Standard

voltage

for

A/D

convertor

clock

control

(Connected

to

Vcc)

Power

control

outfut

7

(During

POWER

ON:

“H")

t

Grid

output

for

FL

display

tube

ete

RO

erate

Heat

detection

input

80

(Unusual

situation:

“H")

Audio

muting

2

signal

output

PLOG

fo

|

(Volume

of

—70

dB

and

less:

“H")

Selector

TUNER

output

eee

po

(Output

in

level

“H”)

JOG

B

Rotary

encoder

input

for

main

volume

'

8

t

ST-CH505

™@

Replacement

Parts

List

Notes:

“tmportant

safety

notice:

Components

identified

by

A

mark

have

special

characteristics

important

for

safety.

Furthermore,

special

parts

which

have

purposes

of

fire-retardant

(resistors),

high-quality

sound

(capacitors),

low-noise

(resistors),

etc.

are

used.

When

replacing

any

of

components,

be

sure

to

use

only

manufacturer's

specified

parts

shown

in

the

parts

list.

“The

parenthesized

indications

in

the

Remarks

columns

specify

the

areas.

(Refer

to

the

cover

page

for

area.)

~

Parts

without

these

indications

can

be

used

for

all

areas.

“The

"(SF)"

mark

denotes

the

standard

part.

Ref.

No.

Part

No.

Part

Name

&

Description

|

Remarks

aie

|

[INTEGRATED

CIRCUITS)

|

t

Part

Name

&

Description

|

Remarks

DIODE

~|DIODE

SPR-30SMDTF

[DIODE

{DIODE

[DIODE

DIODE

RLIN4OO3NO2

{DIODE

MA4082LTA

DIODE

|RLIN4OO3NO2

DIODE

MA4120

(DIODE

MAL85TA

‘DIODE

MA4OSI-L

{DIODE

MA4OOMTA

(DIODE

RLIN4003NO2

{DIODE

‘A

D917

MA4039MTA

|

DIODE

‘A

MA4062-H

:DIODE

A

1.

C,

EA/AM

IF

AMP.

/AM

OSC

1.C,

PLL

FREQ.

SYNTHESIZER

NJU7313MT2

|.

C,

INPUT

SELECTOR

;

ANGSSBSFE2

|.

C,

PHONO

£Q

AMP

|(E)

(EG)

1¢30i[Mé24ogrP

|.

C,

DIGITAL

SOUND

CONT.

col

_‘(SVIBA4S58F

(I.

¢,

BUFFER

ANP.

M38173M6245F

|I.

C,

SYSTEM

CONT.

/FL

DRIVE

W381

73M6252F

|T.

C,

SYSTEM

CONT.

/FL

DRIVE

LASGO8M-TE-L

|1.

C,

BUS

LINE/HALT/RESET

C7218

i

(E)

(EG)

((GN)

1

j

{

$y

TRANSISTOR

(S)

2802787L

28C2785FE

UN411FTA

2SC331

IAIRTA

2SC331

LAIRTA

TRANSISTOR

28C3312RTA

|

TRANSISTOR

‘COIL

(S)

UN4115

TRANSISTOR

:

L101

ELESN1ROMA

=

COIL

:

ELEXTR47MAS

COIL

ELEXTIOOKA9

COIL

28D2144S

UN4111

28021448

TRANSISTOR

28021445

TRANSISTOR

UN4115

TRANSISTOR

Q441,

442

=

|28D21445

[TRANSISTOR

UN4115

TRANSISTOR

2SJ164QRTA

|

TRANSISTOR

RLQZB822KT-D

{COIL

"|ELEXTIROKAS

COIL

SLMIBIOM-IM

{COIL

ELESNIROMA

:COIL

ELEXTIROKAS

{COIL

Q605,

606

|

UN4115

_{TRANSISTOR

|FILTER(S)

i

Q801-811

—

|UN4111

TRANSISTOR

RLFFETWNDOIM

[CERAMIC

FILTER

:(E)

(Gi

RLFFETNGDOLL

|CERAMIC

FILTER

i

(EG)

|

{

DISPLAY

'

t

UNALIFTA

28021445

2D2037DEFTA

”128B1357DEFTA

2SD2037DEFTA

TRANSISTOR

Q904

25021448

TRANSISTOR

:FL

DISPLAY

Q905

25B621A-R

|

TRANSISTOR

A

2SC3940AQSTA

|

TRANSISTOR

A

{SWI

TCH(ES)

|

EVQ21405R

_|SR,

TUNER/BAND

EVQ21405R

—

{SW,

CLOCK/TIMER

EVQ21405R

(SW,

ON/FLAT

EVQ21405R

|SW,

MODE

|

-23-

DIODE{S)

DIODE

D101

MA40S1MTA

D102

MAL65

ST-CH505.

SW,

KARAOKE

SW,

V.

BASS

Part

No.

Part

Name

&

Description

Remarks

$808

SW,

TIMER

REC

i

Ref.

No.

Part

No.

|

Part

Name

&

Description

{

2120

RALOOOG

ITENER

PACK

(FM

FRONT

END)

2120

RALO019

{TUNER

PACK

(FM

FRONT

END)

RLAGZOOSM-T

{COMPONENT

COMBINATION

EVQ21405R

SW,

TIMER

PLAY

RCDHC-278-E

REMOTE

SENSOR

SW,

SELECTOR

(EXT)

SW,

SELECTOR

(INT)

—-—_—___—

4

\OSCILLATOR

(S)

SW,

MULTI

CONTROL

(SET)

|

Remarks

(E)

(GN)

EVQ21405R

SW,

MULTI

CONTROL

(UP)

EVQ21405R

SW,

MULTI

CONTROL

(DOWN)

SW,

MULTI

CONTROL

(RIGHT)

SW,

MULTI

CONTROL

(LEFT)

|RSXZ456KMO7M

|CSCILLATOR

(456KHZ)

RLFDFTDO3M1

(OSCILLATOR

(10.

7MHZ)

[OSCILLATOR

(7.

2MHZ)

RSXA4M1

9503

CONNECTOR

(S)

RIUOGSWO7T

RITOGIWO7T

RJTO63WO7T

RJTOS7WOO7~1

SOCKET

(7P)

CONNECTOR

(7P)

CONNECTOR

(7P)

CONNECTOR

(7P)

RJTOS7WOO7-1

CONNECTOR

(7P)

RJUOOSKOO8M1

RJUOOSKOLOM1

CN201B

RJUOS7¥007

CN202B

RJUOS7#007

CN801B

RJTOO3KOO8-1

RJTOO3KO10-1

E901

SNELO04-1

TRANSFORMER

SOCKET

(8P)

SOCKET

(10P)

SOCKET

(7P)

SOCKET

(7P)

CONNECTOR

(8P)

CONNECTOR

(10P)

EARTH

TERMINAL

4

GND

PLATE

RTP1

146004

RSYOO17M-0

RELAY

POWER

TRANSFORMER

RELAY

JACK

(S)

JK101

RJH4202M

—_‘

[ANTENNA

TERMAINAL

Ti

(0)

JK101

RJH4405-1M

[ANTENNA

TERMAINAL

(GY)

JK201

SJF3068N

[PHONO

(E)

(EG)

/AUX

(GN)

JK202

SJF3069-5N

|DAT/DCC

JK203

RJTOSSKIS

CONNECTOR

(15P)

(BLACK

TYPE)

an

Tne

JK204

RJTOBSWIS

—_[CONNECTOR(15P)

(WHITE.

TYPE)

=

4

COMPONENT

COMBINATION

(S)

RL122006M-T

COMPONENT

COMBINATION

oa

Technics ST-CH505 User manual

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