Technics ST-CH505 Manuale utente

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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