Panasonic RX-CT900 User manual

Service

Ma

RX-CT900

Ly

.

Portable

Stereo

Component

System

RX-CT800

MECHANISM

SERIES

@

SPECIFICATIONS

General:

~

Power

Requirement:

AC;

(E)(EG)..........

220

V,

50

Hz

(EB)

osices

eee

240

V,

50

Hz

Battery;

15

V(10

UM-1

“R20/LR20”

Batteries)

DCIN;

13.2

V(12~15

V)

Memory

Back-up

Battery

for

Computer/

Clock;

6

V

:

(4

UM-3,

“AA”

size

batteries)

Power

Consumption:

45

W

(AC

only)

Power

Output:

60

W

(30

Wx2)...PMPO

30

W

(15

Wx2)...MPO

Speaker:

Woofer;

16

cm

PM

Dynamic

Speaker

(2.72)

Tweeter;

2

cm

Ceramic

Speaker

Jacks:

Input;

CD/AUX

IN;

316

mV,

50

kQ

EXT.

MIC;

2

mV

(200~6000)

Output;

EXT.

SP;

2.7~80

HEADPHONES;

320,

23.5

Dimensions:

700

(W)

218

(H)x

196

(D)

mm

Main

Unit;

349

(W)

x218

(H)x

196

(D)

mm

Speaker

Box;

185

(W)x218

(H)x

183

(D)

mm

Weight:

6.5

kg

without

batteries

Radio

Section:

Frequency

Range:

Intermediate

Frequency:

Sensitivity:

Tape

Deck

Section:

Frequency

Range:

Tape

Speed:

Track

System:

Tape

Deck

Section:

Frequency

Response:

Recording

System:

Tape

Speed:

Track

System:

Country

(E)

Continental

Europe

(EB)

(EG)

ORDER

NO.

MD8906025C2

i

Radio

Cassette

Color

(K)

........

Black

Type

Area

Great

Britain

F.R.

Germany/Italy

FM;

87.5~108

MHz

LW;

146~288

kHz

MW;

522~1611

kHz

FM;

10.7

MHz

AM;

459

kHz

FM;

2

4/50

mW

output

(—3

dB

Limit

Sens.)

LW;

178

uV/m/50

mw

output

MW;

178

UV/m/50

mW

output

TAPE

1

Normal;

40~12000

Hz

CrO2;

40~13000

Hz

4.8

cm/s

4-track

2-channel

stereo

playback

TAPE

2

Normal;

40~12000

Hz

CrOz;

40~13000

Hz

AC

bias,

AC

erase

4.8

cm/s

4-track

2-channel

stereo

recording

and

playback

Design

and

specifications

are

subject

to

change

without

notice.

Panasonic,

Matsushita

Electric

Industrial

Co.,

Ltd.

Central

P.O.

Box

288,

Osaka

530-91,

Japan

RX-CT900

LOCATION

OF

CONTROLS

CY

TIMER

ON

SLP

(Et

TUT

(LIL

Li

GENERAL/TIMER

CONTROLS

@

Speakers

[Tweeters]

(2

cm)

@

Speakers

[Woofers]

(16

cm,

2.70)

©

Mixing

Microphone

Jack

(MIXING

MIC)

(@3.5,

200~600Q)

©

Headphones

Jack

(PHONES)

(23.5,

32Q)

@

Operation

Switch

(OPERATION)

@

Operation/Battery

Check

Indicator

(OPR/BATT)

@

AC

Connection

Indicator

©

Editing

Selector/FM

Mode

Selector/Beat

Proof

Switch

(EDITING/FM

MODE/B.P)

©

Function

Selector

(SELECTOR)

@

Volume

Control

(VOLUME)

®

XBS

Switch

(XBS)

®

Graphic

Equalizer

(GRAPHIC

EQUALIZER)

®

Balance

Control

(BALANCE)

_

@®

Display

Mode

Selector

(DISPLAY)

@®

Time

Set

Buttons

(TIME

SET)

®

Adjust

Button

(ADJUST)

@®

On-Time

Button

(ON-TIME)

®

Timer

Button

(TIMER)

®

Sleep

Button

(SLEEP)

@

Clock/Timer

Display

@®

Timer

Display

Indicator

(4)

Timer

Indicator

(TIMER)

©

Timer

On

Indicator

(TIMER

ON)

©

Sleep

Indicator

(SLP)

NS

MEMORY

———TIME

SET

®

SLEEP

os

i

ADJUST

16

TUNER

CONTROLS

@

Tuning

Display

@®

Band

Indicators

(FM1-FM2+LW-MW)

)

FM

Stereo

Indicator

(STEREO)

©

Tuning

Indicator

([TUNE])

©

Memory

Station

Indicator

©

Memory

Indicator

(M)

®

Memory

Station

Buttons

@®

Memory

Button

(MEMORY)

@®

Tuning

Buttons

(TUNING)

@

Memory

Scan

Button

(MEMORY

SCAN)

@

Band

Selector

(FM1,

FM2,

LW,

MW)

DECK

CONTROLS

@

Tape

Selectors

(TAPE

SELECTOR)

@

Deck

1

Cassette

Compartment

ny

@®

Deck

1

Tape

Operation

Buttons

Playback

Button

(>

PLAY)

aes

Rewind

Button

(<<

REW)

,

Fast

Forward

Button

(>>

FF)

Stop/Eject

Button

(@/4

STOP/EJECT)

Pause

Button

(1

PAUSE)

@

Deck

2

Cassette

Compartment

@

Deck

2

Tape

Operation

Buttons

Record

Button

(¢

[RECORD))

Playback

Button

(>

PLAY)

)

Rewind

Button

(<<

REW)

ee

Fast

Forward

Button

(>>

FF)

Stop/Eject

Button

(—/4STOP/EJECT)

Pause

Button

(I

PAUSE)

@

‘Dolby

Noise

Reduction

Switch

(DOLBY

NR)

“Dolby

noise

reduction

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

“DOLBY”

and

the

double-D

symbol

D0

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

i

ied

S==

ee

©)

=

Ot)

oT

When

the

tape

is

caught

in

the

pinch

roller,

etc.

Release

the

tape

by

tuming

the

pulley

on

the

motor

with

the

screwdriver

in

the

direction

of

the

arrow.

)

;

ee

Removal

of

the

Front

Cabinet

[Removal

of

Screws]

Use

a

screwdriver

similar

to

the

one

in

the

figure.

1

A)

5

he

BUSHING

|

fa

PHAIOOA

oes

no

CO

a

f

conn}

:

|

Co

ot

-

;

Ss

Ng

L=150.mm

or

longer

9

=

aol

:

1

er

16)

(7)

elf

you

attach

a

bushing

(part

Battery

Cov

number:

RHR109A)

to

the

tip

of

the

screwdriver

as

shown

in

the

figure,

the

screwdriver

tip

will

easily

fit

in

the

screw

heads

and

1.

Remove

the

battery

cover.

-

you

will

be

able

to

remove

the

2.

Remove

7

screws

(@~@).

Screws

with

ase.

RX-CT900

_

STEREO

_

rer

thie

rt

MILI

wee

SLEEP

TIMER

ON-TIME

ATUST

REAR

PANEL

€

Speaker

Cable

Compartments

@

Speaker

Wall

Mounts

@

Speaker

Release

Levers

(RELEASE)

@

Handle

&

Telescopic

Antenna

@

Speaker

Cables

©

CD/AUX

Input

Jacks

(CD/AUX

IN)

(316

mV,

50

kQ)

@

Battery

Compartment

@

DC

Input

Jack

[DC

IN

13.2

V

(12-15

V)JO--@]

@

AC

Socket

(AC

iN

~)

@®

Speaker

Terminals

[SPEAKER

(IMP

2.7—80)]

Volume

Knob

G.E.Q

Knobs

Balance

Knobs

Stop/Eject

Button

3.

Pull

out

the

volume

knob,

G.E.Q.

knob

and

balance

knob.

4.

Press

the

stop/eject

button

and

the

open

the

cassette

lid.

RX-CT900

(ee

ee

er

a

ee

Rae

Hemnows|

of

the

Graphic

Equalizer

Procedure

|

cs502

CP510

cps

4CP512

Procedure

0

1-2

=

j

133

g

5

1.

Remove

4

screws

(@~Q).

1.

Remove

3

screws

(@~®).

2.

Remove

4

connector

(CP510,

CP511, CP512,

CS502).

2.

Remove

the

connector

(CP302).

Procedure

1-23-45

CP301

Procedure

1-4

1.

Remove

2

screws

(@,

@).

2.

Remove

2

connector

(CP402,

CS401).

1.

Remove

the

connector

(CP301).

\

Removal

of

the

Power

P.C.B.

_

MainP.cB.

|

.

Procedure

1)

saa

1.

Remove

the

connector

(CP301).

Se

/

Record

Lever

.

Remove

the

record

lever.

;

eal

2.

Remove

the

record

lever.

.

Remove

5

screws

(@~@).

.

Release

the

claw

in

the

direction

of

arrow.

salient

ilar

Removal

of

the

Battery

P.C.B.

Removal

of

the

Mechanism

Button

Procedure

ca

152-37

1-8

:

1.

Release

the

claw

in

the

direction

of

arrow.

2.

Remove

the

battery

P.C.B.

in

the

direction

of

arrow.

|

—H

‘daa

aaa

Remove

4

screws

(@~@).

RX-CT900

Ref.

No.

Removal

of

the

Cassette

Holder

Ref.

No.

Removal

of

the

Speaker’s

Front

9

10

Cabinet

]

2)

Procedure

m@

HOW

TO

REPLACE

THE

POWER

TRANSISTOR

Main

P.C.B.

Procedure

10

Power

Transistor

Nut

arrow.

Release

4

ribs

in

the

direction

of

arrow.

Removal

of

the

Speaker

(Woofer)

Procedure

10-11

Note

If

the

nuts

can

not

be

easily

removed

while

the

screws

are

being

turned,

push

the

screw

heads

with

the

Phillips

screwdriver

(see

figure)

and

keep

them

in

this

position,

and

then

turn

the

nuts.

Solder

2.

Remove

the

solders

and

then

the

Power

Transistor

in

the

direction

of

the

arrow.

Sound

Absorbing

Material

1.

Remove

the

sound

absorbing

material.

2.

Remove

4

screws

(@~@).

Procedure

12

eRemove

Cassette

Lid

Procedure

10-13

|

aoe

obthe

Speaker

Wall

eee

Removal

of

the

Speaker

(Tweeter)

jount

0

2

screws

(@,

@).

Detach

the

tweeter

in

the

direction

of

arrow.

Note:

The

tweeter

has

been

attached

to

the

cabinet

with

double-sided

adhesive

tape.

\

|

e@Assemble

the

front

cabinet

|

match

mechanism

button

and

|

mechanism

lever.

|

1

!

/

3.

Apply

the

compound

grease

(SZZOL15)

to

the

sheet

and

Power

Transistor.

4.

Hold

the

screws

with

the

pliers

as

shown

in

the

figure

and

then

insert

them

in

the

holes

in

the

Power

Transistor,

sheet

and

heatsink

respectively.

Power

Transistor

Nut

5.

Attach

the

nuts

and

then

secure

the

screws

with

the

driver

as

shown

in

the

figure.

Pliers

Apply

the

compound

grease

(SZZOL15)

to

this

surface.

Nut

.

Turn

the

nuts

in

the

direction

of

the

arrow.

RX-CT900

SCHEMATIC

DIAGRAM

(for

operation

circuit)

(Parts

list

on

page

22~28.)

Notes:

1.

S1-1~S1-7:

Record/Playback

switch

in

“PLAYBACK”

position.

35.

VR1:

FM

VCO

adjustment

VR.

(P...PLAYBACK,

R...RECORD)

36.

VR101:

Deck

1

playback

gain

adjustment

VR

(Lch).

AL

OPERATION

SWITCH

CIRCUIT

2.

S2-1~S2-3:

Function

select

switch

in

“TAPE”

position.

37.

VR102:

Deck

2

playback

gain

adjustment

VR

(Lch).

(T...

TAPE,

R...

TUNER,

A...[CD/AUX)

38.

VR103:

Record

level

adjustment

VR

(Lch).

3.

S3:

Editing/FM

mode/Beat

proof

switch.

39.

VR111:

Graphic

equalizer

control

(100

Hz)/XBS

level

control

Oe

oe

ee

ved

Sais

air

iwie

Sani

S3-1;

Editing

mode

switch

in

“MIC”

position

VR

(Lch).

ema

(Men

2

(Mem

6)

(Mem

51

(Adina

isteep)

(ner)

(Royer)

blay

ssid

:

(M...MIC,

N...NORMAL

SPEED,

40.

VR112:

Graphic

equalizer

control

VR

(330

Hz,

Leh).

ey

oye

Bela

1

H...HIGH

SPEED)

41.

VR113:

Graphic

equalizer

control

VR

(1

kHz,

Lch).

rye

Pagan]

so]

$3-2;

FM

mode/Beat

proof

switch

in

42.

VR114:

Graphic

equalizer

control

VR

(3.3

kHz,

Lch).

Men

As

{on

Time)

i

com

“STEREO/!’

position.

43.

VR115:

Graphic

equalizer

control

VR

(10

kHz,

Lch).

cal

at

al

ryoissidara

ian

(S/I...STEREO/I,

S/HE...STEREO/#1,

M/

44.

VR116:

Volume

control

VR

(Lch).

oa

i

ae

J

HEL...

MONO/HED

45.

VR201:

Deck

1

playback

gain

adjustment

VR

(Rch).

(disploy)

|

sMemory)

|

(M.scon

4

4.

S4:

Deck

1

tape

select

switch

in

“NORMAL”

position.

46.

VR202:

Deck

2

playback

gain

adjustment

VR

(Rech).

oy

oS

ial

avenge

sara

(N...NORMAL,

Cr...[METAL]/CrO2)

47.

VR203:

Record

level

adjustment

VR

(Reh).

,

a

‘

D410

5.

S5-1~S5-2:

Deck

2

tape

select

switch

in

“NORMAL”

position.

48.

VR211:

Graphic

equalizer

control

(100

Hz)/XBS

level

control

:

t

4

h

cae

OPERATION

(N...NORMAL,

Cr...

[METAL]/CrOz)

VR

(Reh).

ee

6.

S6:

Dolby

NR

switch

in

“OFF”

position.

49.

VR212:

Graphic

equalizer

control

VR

(330

Hz,

Reh).

Dat

fo

.

7.

S7-1,S7-2:

XBS

switch

in

“OFF”

position.

50.

VR213:

Graphic

equalizer

control

VR

(1

kHz,

Reh).

as

AC

CONNECTION

INO.

8.

S8:

Mic

switch.

51.

VR214:

Graphic

equalizer

control

VR

(3.3

kHz,

Rh).

Baeergn

“i

Sv

eyolssiaaTa

ae

:

9.

SO:

Deck

1

play

switch.

52.

VR215:

Graphic

equalizer

control

VR

(10

kHz,

Rh).

RESET

--

OV

avorsstssra

Te.

al

pags

i

cr4oz

10.

S10:

Deck

1

motor

switch.

53.

VR216:

Volume

control

VR

(Reh).

\

se

ae

Q

CD

stanay

i

14:

S11:

Deck

2

motor

switch.

54.

VR302:

Record

bias

(CrOz)

adjustment

VR.

[ea

eRe

as

Dicey

TO

romen

our

12.

$12:

AC/DC

select

switch

in

“AC”

position.

55.

VR303:

Record

bias

(Normal)

adjustment

VR.

1C402

Rr

be

4)

—

13.

S401:

Station

memory

switch

(8).

56.

VR304:

Balance

control

VR.

4

TT

@)

rato

14.

S402:

Station

memory

switch

(4).

57.

VR501:

Tape

speed

adjustment

VR.

s

PA

©)

earrery

15.

S403:

MW

switch.

58.

DC

voltage

measurements

are

taken

with

electronics

voltmeter.

2

agv

a8

ao-386

©)

~

se

Bhuain

16.

S404:

Station

memory

switch

(7).

The

negative

terminal

of

the

battery

provides

negative

meter

3

aos

VR

UP

|

cesaoe)

17.

S405:

Station

memory

switch

(3).

connection

point.

8

qaio

3308

OY

**

18.

S406:

LW

switch.

No

mark...PLAYBACK,[

]...RECORD,(

)...AM,<

>...-M

3s

TO)

V8

own

19.

$407:

Station

memory

switch

(6).

<

»...HIGH

SPEED

eae

20.

S408:

Station

memory

switch

(2).

59.

Battery

Currect:

Vol.min.............

200

mA

(Tape

Playback)

Ors

21.

$409:

FM2

switch.

Wolo

(aie

«hoes

as

haceiGipel

eee

hier

ces

1450

mA

(Radio)

one

22.

S410:

Station

memory

switch

(5).

1500

mA

(Tape

Playback)

23.

S411:

Station

memory

switch

(1).

Measurement

instruction

24.

$412:

FM1

switch.

Radio:

FM

60

dB,

30%

Mo)

25.

S413:

Adjust

switch.

Tape:

315

Hz,0dB

oe

i

26.

S414:

Tuning/Time

set

switch

(—).

60.

The

mark

(MM)

shows

test

point

e.g.

=test

point

1.

Fa

27.

S415:

Sleep

switch.

61.

Important

safety

notice.

Ge

28.

S416:

Tuning/Time

set

switch

(+).

Components

identified

by

A\

mark

have

special

characteristics

srenes

i

29.

S417:

Display

switch.

important

for

safety.

@isione

1,

ain

30.

S418:

Timer

switch.

When

repiacing

any

of

these

components,

use

oniy

manufacturer's

1c401

e

—4)

ctock

CIRCUIT

31.

$419:

On-time

switch.

specified

parts.

Gite

sees

32.

$420:

Memory

switch.

wuTe

$3.

S421:

Operation

switch.

GND

:

34.

$422:

Memory

scan

switch.

h

\

ew

stereo

R406!

sue

Bp

IK

--0

v

®This

schematic

diagram

may

be

modified

at

any

time

with

the

development

of

new

technology.

cc:

FM

SIGNAL

LINE

mm):

AM

SIGNAL

LINE

E>:

FM

OSC

SIGNAL

LINE

E

| i

|

iStesoacors

Zp:

AMOSC

SIGNAL

LINE

sa:

PLAYBACK

SIGNAL

LINE

Sangriy

eer

ee

singe

con

i:

MIC

SIGNAL

LINE

10:

RECORD

SIGNAL

LINE

>:

MAIN

SIGNAL

LINE

expe:

+B

LINE

F

L040!

(LDBU93974AZ)

RX-CT900

SCHEMATIC

DIAGRAM

(for

Main/Mechanism/LED/Graphic

E.Q./Batter/

Power

Supply

Circuit

(Parts

list

on

page

22~28.)

1

2

3

4

5 6

7

8

EE}

main

circuit

1c4

AN7205

RSI

08,9

1c3

R48

IK

FM

FRONT

END

eo

RVDSV

C32

LAI1265-GAD

—

WW.

A

REGULATOR

Si

FM/AM

IF

AMP,

DET,AF

AMP

9.5V

5

@

AM

OSC,

MIX

-|

9

D>

ve]

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Panasonic RX-CT900 User manual

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