Panasonic SU-CH7 User manual

ORDER

NO.

AD9104082C8

Service

Manual

Amplifier

enact

Because

unique

interconnecting

cables,

when

component

requires

service,

send

bring

the

entire

system.

SPECIFICATIONS

(DIN

500)

MAIN

AMP.

SECTION

Power

output

DIN

KHz

THD

60.

2x25

kHz

THD

2x5

both

channel

driven

240

Total

harmonic

distortion

half

power

kHz:

Low

Amp

0.09%

(6Q)

Headphones

output

level/impedance

300

mV/330Q

PREAMP.

SECTION

input

sensitivity/impedance

PHONO

mV/47

MIC

0.7

mV/10

DAT

250

mV/27

S/N

(rated

power,

6Q):

Low

Amp

PHONO

(IHF.

dB)

DAT,

CD,

TAPE

(IHF.

dB)

Graphic

equalizer

control

Hz,

250

Hz,

kHz,

12.5

kHz

Muting

—20

Super

bass

Hz,

+44B

Output

voltage/impedance

DAT

REC

OUT

150

(E)

(EB)

(EG)

(GC)

(GN)

Player

System

[Tuner

Amplifier

SC-CH7

ST-CH7L

SU-CH7

SL-CH7

Technics/Panasonic

Amplifier

Color

(K)

ceviv

cee.

Black

Type

Continental

Europe.

Great

Britain.

F.R.

Germany

and

Italy.

Asia,

Latin

America,

Middle

Near

East

and

Africa.

(GN)

Oceania.

System:

SC-CH7

GENERAL

Power

consumption

250

Power

supply

For

Great

Britain

and

Oceania

50/60

Hz,.230~240

For

F.R.

Germany,

Italy

and

Continental

Europe

50/60

Hz,

230

For

others

50/60

Hz,

110

V~127

V/220

V~240

Dimensions

(WxHxD)

215

110x303

(815/42"X

Yo”

1115/16")

Weight

(9.3

Ib.)

Notes:

Total

harmonic

distortion

measured

the

digital

spectrum

analyzer.

Specifications

are

subject

change

without

notice.

Weight

and

dimensions

shown

are

approximate.

Cassette

Deck

Speacers

RS-CH7

SB-¢

SU-CH7

CONTENTS

Page

BEFORE

REPAIR...

2...

cee

eee

een

eee

SCHEMATIC

DIAGRAM

........0

0.0

cece

ence

eee

13~19

PROTECTION

CIRCUITRY

2.0.0...

ccc

eee

cece

ence

PRINTED

CIRCUIT

BOARDS.

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

0.0.0

cece

eee

20~24

ACCESSORIES?

«5.2

sev.ccntsueSing

euip

ance

Weeks

Mey

eae

eles

WIRING

CONNECTION

DIAGRAM

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

00.00

cues

HOW

INSTALL

THE

SYSTEM.............00.0

cece

ees

FUNCTIONS

TERMINALS

.........

0.00.

eee

sees

CONNECTIONS

.......

cece

ence

cece

ene

4,5

BLOCK

DIAGRAM

.........

cece

cents

27~29

LOCATION

CONTROLS

......

00.00

cee

eee

6,7

REPLACEMENT

PARTS

LIST

..........

00.00

cee

eee

30~36

DISASSEMBLY

INSTRUCTIONS

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

0...

eee

8~11

CABINET

PARTS

LOCATION

..............00.0

cece

eae

37,

DESCRIPTION

FLPANEL

...............2.

ccc

cence

PACKING

(For

System:

SC-CH7).............

0.00

cece

vues

BEFORE

REPAIR

(1)

Turn

off

the

power

supply.

Using

10Q,

resistor

connect

both

ends

power

supply

capacitors

(C703,

C704)

order

discharge

the

voltage.

(2)

Before

turning

the

power

supply

on,

after

completion

repair,

slowly

apply

the

primary

voltage

using

power

supply

voltage

controller

make

sure

that

the

consumed

current

Hz/60

SIGNAL

mode

should

shown

below

with

respect

supply

voltage

110

V~127

V/220

V~240

Consumedcurrent50H2

———

85~255

PROTECTION

CIRCUITRY

The

protection

circuitry

may

have

operated

either

the

following

conditions

noticed:

“No

sound

heard

when

the

power

switched

ON.

“Sound

stops

during

performance.

The

function

this

circuitry

prevent

circuitry

damage

if,

for

example,

the

positive

and

negative

speaker

connection

wires

are

“shorted”,

speaker

systems

with

impedance

less

than

the

indicated

rated

impedance

this

unit

are

used.

this

occurs,

the

procedure

outlined

below:

Switch

OFF

the

power.

Determine

the

cause

the

problem

and

correct

it.

Switch

the

power

once

again.

Note:

When

the

protection

circuitry

functions,

the

unit

will

not

operate

unless

the

power

first

switched

OFF

and

then

again.

ACCESSORIES

Speaker

cords

(2)

<REC201B500-1>

@AC

power

supply

cords

(1)

for

(E,

EG)

area

for

(EB)

area

for

(GC)

area

for

(GN)

area

Remote

control

batteries

(2)

(UM-4,

“AAA”,

R03)

@FM

indoor

antenna

(1)

for

(E,

EB,

EG)

area

for

(GC,

GN)

area

©)

eAttachment

plug

(1)

for

(EB)

area

Remote

control

transmite

(1)

<RAK-SC510W>

for

(E,

EB,

EG)

area

<RAK-SC511W>

for

(GC,

GN)

area

SU-CH7

@Flat

cables

(2)

Back

cover

(4)

@LW/MW

loop

antenna

(1)

and

Antenna

holder

(1)

and

mounting

screws

(2)

<RYFO122-K>

——SSY]

for

player

Blue

(REX9162)

for

tuner

Black

(REX9163)

SLD

<RKF0127D-

K2>

for

amplifier

<SMA233-1M>

<RKF0127E-K2>

—

for

cassette

deck

<XTN3+10AFZ>

“

Installing

the

components

vertically

Left

speaker

Right

speaker

SB-CH7

Compact

disc

SB-CH7

player

‘2]

SL-CH7

Tuner

eS?

___

900}

ST-CH7L

Amplifier

SU-CH7

Cassette

deck

RS-CH7

J@o

Compact

disc

Tuner

player

ST-CH7L

SL-CH7

900

——~

==]

ane

UES

CYT.

eee

aeme

omen

-2

Amplifier

Cassette

deck

SU-CH7

RS-CH7

Installing

the

components

line

Amplifier

Tuner

Cassette

deck;

SU-CH7

ST-CH7L

RS-CH7

Compact

disc

player

SL-CH7

pean

;

SUCH

CONNECTIONS

Flat

cables

After

connection,

please

fold

and

press

the

cables

flat

the

back

the

unit

possible.

From

the

amplifier

the

cassette

deck

Connecting

Hold

the

connector

with

the

recessed

part

and

press

Power

switch

located

the

rear

panel.

the

center

until

you

hear

Pa)

Make

sure

that

the

power

switch

the

back

the

click.

amplifier

switched

ON.

The

white

line

should

the

right

side.

Disconnecting

When

installing

the

back

cover,

put

this

flat

cable

out

the

back

cover.

Speaker

cables

Other

types

speaker

cannot

connected

this

unit.

Match

the

four

wires

from

the

left

and

right

speaker

cables

with

the

same

colored

levers

the

speaker

terminales,

then

insert

the

wires

into

the

respective

terminals.

Twist

the

wire.

Push

down

the

lever,

insert

the

bare

ends

the

wires,

and

push

the

lever.

(Refer

the

right)

Note:

¢Make

sure

the

bare

ends

the

wires

are

not

unraveled.

(If

they

are,

twist

them

tight

again.)

eTake

care

not

short

the

wires.

(The

main

unit

could

damaged

they

are

shorted.)

Speaker

First

connect

the

cables

the

speakers,

then

the

amplifier.

Speaker

cable

(included)

Speaker

Amplifier

Notice

for

speaker

connections:

Connect

each

color

coded

wire

the

speaker

cable

the

corresponding

color

coded

terminal

according

the

following

chart.

Polarity

High

tone

[Lowtone

Black

External

unit

connection

DAT

(digital

audio

tape

deck)

DAT

INPUT

OUTPUT

Stereo

cord

Amplifier

[

REC

OUT

PLAY

BACK

PHONO

(turntable

system)

Turntabl

OUTPUT

seein

Stereo

————_.

cord

Amplifier

“GND”

terminal

This

terminal

for

use

with

turntables

which

have

ground

wire.

SU-CH7

LOCATION

CONTROLS

Amplifier:

control

section

Sound

effect

level

control

(SOUND

JOG)

This

control

used

for

adjusting

the

ievel

the

ambience

enhancement

effect

and

the

equalization

level.

Ambience

enhancement

button

(SPACE)

This

button

used

activate

ambience

enhancement

mode.

Spectrum

mode-select/demonstration

button

(-SPECTRUM

MODE-—-DEMO)

This

button

used

select

one

the

six

spectrum

curves.

you

press

and

hold

this

button,

six

types

sound

effects

(spectrum

curve

combination

with

ambience

enhancement)

will

sequentially

changed

(Demonstration

mode).

Super

bass

indicator

\lluminates

when

the

super

bass

mode

activated.

Super

bass

button

(SUPER

BASS)

When

this

button

pressed,

the

dynamic

low

frequency

ranges

are

boosted.

Volume

preset

button

(VOL.

PRESET)

This

button

used

make

volume

presetting.

Volume

level

control

(VOLUME)

This

contro!

used

adjust

the

volume-leve!

(-82

dB~

dB).

Note

that

—82

the

lowest

volume

setting

and

the

highest

level

setting.

Equalization

function

button

(ON/FLAT)

This

button

used

switch

the

equalization

correction

function.

equalization

correction

desired,

press

this

button

again

cancel

the

function.

(Q)

Headphones

jack

(PHONES)

Microphone

jack

(MIC)

Equalization

mode-select/recail

button

(-MODE—RECALL)

This

button

used

retrieve

pre-programmed

equalization

curve

from

the

memory.

you

press

and

hold

this

button,

curve

you

programmed

can

retrieved.

Input

selectors

and

indicators

These

selectors

are

used

select

the

sound

source

heard.

When

the

sound

source

selected,

the

indicator

above

the

selector

will

illuminate.

Standby

indicator

(STANDBY)

This

indicator

illuminates

when

the

power

“STANDBY.()

/ON"

switch

the

unit

that

the

remote

control

switched

“OFF”.

Its

purpose

alert

the

user

the

constant

supply

voltage

the

internal

circuitry

even

with

the

power

switch

OFF.

For

this

unit,

even

this

switch

switched

the

“STANDBY”

position,

there

still

slight

power

consumption

about

watts:

this

is in

order

retain

the

“most

recent”

memory

and

the

preset-memory

functions.

suSERT-

HEAVY

CLEAR

»SOFT

»vocat|i*

mHPST

CAR

2S50Hz

thHz

SU-CH7

ARGE

===

MAX

4kHz

12.5kHz

Amplifier:

display

section

Ambience

enhancement

mode

indicator

(SPACE)

llluminates

when

the

ambience

enhancement

mode

acti-

vated.

(6)

Spectrum

analysis

display

This

display

shows

the

spectrum

analysis

level.

(©)

Level

meter

Display

the

volume

level

being

adjusted

the

volume

control.

When

adjusting

the

level

the

ambience

enhance-

ment

effect

with

the

sound

effect

level

control,

the

display

shows

the

level

the

ambience

enhancement

effect.

Ambience

enhancement

adjustment

indicator

(SPACE)

\lluminates

when

adjusting

the

level

the

ambience

en-

hancement

effect.

©)

edit

indicator

(EDIT)

\lluminates

when

making

edit-recording

compact

disc.

(f)

Volume

level

display

Displays

the

volume

level.

Sound

effect

indicator

(¥Y

SOUND

JOG

When

“¥”

illuminates,

shows

the

equalization

curves

can

adjusted,

and

when

“A”

illuminates,

shows

that

the

ambience

enhancement

effect

can

adjusted.

(h)

Equalization

mode

indicators

(HEAVY-CAR

ST)

These

indicators

show

which

the

six

equalization

curves

currently

used.

“USER”

indicator

(USER)

This

indicator

illuminates

show

that

the

desiredequalization

curves

can

programmed

into

memory

retrieved

from

the

memory.

Volume

indicator

(VOL.)

illuminates

when

adjusting

the

volume

level.

(K)

Muting

indicator

(MUTING)

Hluminates

when

the

muting

mode

activated.

SU-CH7

DISASSEMBLY

INSTRUCTIONS

“ATTENTION

SERVICER”

Some

chassis

components

may

have

sharp

edges.

careful

when

disassembling

and

servicing.

Removal

the

Cabinet

Removal

the

Volume/Filter

P.C.B.

Procedure

Cabinet

Volume/Filter

Remove

screws

(@,

@).

Remove

the

front

panel

the

direction

arrow.

Remove

the

screws

(@,

@).

Remove

flat

cables

(CN204,

CN501).

Remove

the

front

panel

the

direction

arrow.

seas

Removal

the

P.C.B.

Sound

ipa

kon

Procedure

1523-4

Volume

Knob

Remove

the

volume

knob

and

nut.

Remove

the

sound

jog

knob

and

nut.

Remove3

screws

(Q@~®).

Removethe

P.C.B.

the

direction

arrow,

making

sure

not

damage

the

connectors

(CP604,

CP605,

CP606).

RON

SU-CH7

Ref.

No.

Removal

the

Microphone/

Removal

the

Operation

P.C.B.

Headphone

Jack

P.C.B.

Procedure

1-23-45

152-346

Operation

P.C.B.

Holder

Microphone/

Headphone

Jack

P.C.B.

Remove

the

screw

(@).

Remove

screws

(@~®).

Remove

the

holder.

Remove

claws.

Remove

the

P.C.B

the

direction

arrow.

;

Ref.

No.

Ref.

No.

Removal

the

Input-Output

Removal

the

Rear

Panel

terminal

P.C.B.

Procedure

;

Procedure

157

12-37-58

Rear

Panel

Input—Output

terminal

P.C.B.

Remove

screws

(@~@).

Remove

the

connector

(CP902).

Remove

the

rear

panel

the

direction

arrow.

Remove

the

P.C.B.

the

direction

arrow.

Removal

the

TP.

P.C.B.

Bis

Removal

the

Main

P.C.B.

Procedure

1-2>3—

7->8—9-—10

1>2—-3—

Remove

the

flat

cable

(CN701).

Remove

screws

(@~@).

Remove

the

screw

(@).

Remove

the

P.C.B.

the

direction

arrow.

SU-CH7

Procedure

1-2>3—

7-8-9

Power

PZ,

(Woofer)

Power

transformer

Power

(Tweeter)

Regulator

transistor

Unsolder

the

power

IC.

Remove

screws

(@~@).

eWhen

mounting

the

power

regulafor

transistor.

Apply

silicone

compound

(SZZOL155)

the

rear

side

power

Remove

the

flat

cable

(CN701).

regulator

transistor.

Remove

the

screws

(@~@).

Removal

the

Fan

Motor

Remove

the

motor

cover

(shown

Fig.

3).

Remove

the

motor

from

the

fan

casing

(shown

Fig.

4).

When

mounting

the

motor

fan.

align

the

fan

casings

Procedure

: ;

157513

progection

with

the

hole

the

fan

motor

(shown

Fig.

5).

Release

the

claws

(shown

Fig.

1).

Insert

screwdriver

the

root

the

cooling

fan.

FanMotor

Rear

Panel

Removal

Inlet

P.C.B.

Procedure

114

Remove

the

screw

(@).

Remove

claws.

Inlet

P.C.B.

—10—

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