Panasonic RQ-342 Manuale utente

ORDER

NO.

GAD84065431A2

Service

Manual

AC/Battery

Mini

Cassette

Recorder

Mini

Cassette

with

Auto-Stop

Mechanism

R

Q

342

(Brown)

This

is

the

service

Manual

for

the

following

areas.

|

[Z|...For

all

European

areas

except

United

Kingdom.

Please

use

this

manual

together

with

the

service

manual

for

model

No.

RQ-342

(Original)

order

No.

GAD84055421C3.

...For

United

Kingdom.

|

Specifications

Power

requirement:

AC;

with

optional

Panasonic

AC

Adaptor

RP-31

PARTS

COMPARISON

TABLE:

Please

revise

the

original

parts

list

in

the

Service

Manual

(RQ-342)

to

conform

to

the

changes

shown

herein.

If

new

part

numbers

are

shown,

be

sure

to

use

them

when

ordering

parts.

Part

Numbers

Ref.

No.

Part

Name

&

Description

—

Remarks

“Silver

Type”

(Original)

“Brown

Type”

M12-1

stopper

—

QML4226

Stopper

Pressure

Spring

QBC1511

M12-3

stopper

Spring

—

QBT2064

Added

M12-4

Washer

2¢

—

XUC2FT

Added

FF

Button

Assembly

QXB0832

QXB0835

REW

Button

Assembly

QXB0833

QXB0836

Stop

Button

Assembly

QXB0834

QXB0837

FF/REW

Lever

Assembly

QML4166

QXL1755

Ld

Pause

Rod

Assembly

QXR1045

QXR1051

Supply

Reel

Table

QMG1451

QMB1451

Reel

Table

Gear-L

QDC1370

QDG1370

Back

Tension

Spring

—

QBC1478

Bottom

Case

QKMA0116S

QKMA0116C

K2

Battery

Lid

QKFA4007S

QKFA4007C

K

REESE

etme

K4

QKMA0115S

QKMA0115C

Deleted

Main

Name

Plate

QGSA0105

QFTCO7LO03NZ

Deleted

QYH0116H

mm

,

>

“

Panasonic

hasan

Cnet

tating

CL

|

Ref.

N

aware

ain

a

Part

Numbers

ef.

No.

art

Name

escription

7

|

ie

“Silver

Type”

(Original)

~

“Brown

Type”

Pca

|

Capacitor

——=SsSSCS*=*dCOFODATEMML

=|

Clete

Capacitor

MECHANICAL

PARTS

LOCATION

ADDITION

.

USS

EL

SE

“Brown

Type”

ADDITION

L

“Silver

Type”

(Original)

“Brown

Type”

CIRCUIT

BOARD

AND

WIRING

CONNECTION

DIAGRAM

DELETE

“Brown

Type”

ASA

Printed

in

Japan

A.M

“Silver

Type”

(Original)

ORDER

NO.

GAD84055421C3

Service

Manual

Mini

C

t

AC/Battery

Mini

Cassette

Recorder

Sree

with

Auto-Stop

Mechanism

RQ-342

(Silver)

ee

=

i

Ee

This

is

the

Service

Manual

|

for

the

following

areas.

|

[X

]...For

Asia,

Latin

America,

Middle

|

East

and

Africa

areas.

Specifications

Power

requirement:

Battery;

3V

(two

UM-3,

R6

size

dry

batteries)

[x]...AC;

with

optional

AC

adaptor

RP-34

Motor:

Electric

governor

motor

Power

output:

300mW...RMS

(max.)

Frequency

response:

200~7,000

Hz

Tape

speed:

4.8cm/s

Track

system:

2-track

monaural

recording

and

playback

Fast

forward

and

rewind

time:

Approx.

145

seconds

with

C-60

cassette

tape

Jacks:

Mic;

sensitivity

0.25mV/applicable

microphone

impedance

2002-6002

DC

in;

3V

Monitor;

8

Speaker:

4.5cm

PM

dynamic

speaker

Dimensions:

91.5mm(W)x135.5mm(H)x37mm(D)

Weight:

340g,

without

batteries

Design

and

specifications

are

subject

to

change

without

notice.

Lo

=

Matsushita

Electric

Trading

Co.,

Ltd.

National

P.O.

Box

288,

Central

Osaka

Japan

LOCATION

OF

CONTROLS

AND

COMPONENTS

@)

Monitor

Jack

[82/M3

(3.54)]

(2)

Microphone

Jack

(M3/3.54)

@

Built-in

Microphone

(3)

Volume

Control

ee:

am

@)

Stop/Eject

Button

(2)

Speaker

(5)

Record

Button

(4.5cem/4Q)

(6)

Rewind/Review

Button

Supply

Input

Jack

[DC

IN

3V/5.59]

(7)

Play

Button

Fast

Forward/Cue

Button

Battery

|

Compartment

Cassette

Compartment

Cover

(9)

Pause

Button

TO

ATTACH

HANDSTRAP

@

Cue

and

Review

¢

Automatic

Stop

When

the

tape

comes

to

its

end

during

playback

(or

recording),

the

tape

stops

moving

automatically,

the

Play

(and

Record)

Button

returns

to

its

original

position,

and

the

power

source

is

turned

off.

If,

during

tape

playback,

the

Fast

Forward/Cue

Button

(or

the

Rewind/Review

Button)

is

partially

pressed,

the

tape

will

be

moved

rapidly

forward

(or

rewound)

and

the

tape

sound

can

be

heard

(although

garbled)

from

the

speaker

as

long

as

the

button

is

partially

pressed.

When

the

button

is

pushed

further,

the

playback

sound

may

no

longer

be

heard.

DISASSEMBLY

INSTRUCTIONS

(A)

Ref.

No.

Procedure

Remove

—.

Bottom

Case

4

screws

(2.625)

1

Main

Circuit

Board

|

Screw

(2x4)

RQ-342

1

2 3

4

5

6

7

8

f\

Tl

C

DI

f\

G

R

f\

Numbering

System

of

Capacitor

SC

H

EM

Mi

Example

:

2

7

ECKD

1H

102

z

F

.

e

_

Type

Voltage

ane

Tolerance

Peculiarity

Q1

Q2

IC1

ECEA

_50

R47

Sp

beac

2SC2021LN

F(R,S)

S38

$1-4

28C2021

F(R,S)

[BA51

5]

Type

Voltage

Peculiarity

Value

,

[2SC2021]

[2802021]

POWER

AMP

(0.47uF)

A

PLAY

EQ/MIC

AMP

A.G.C.

=

o

(11)

Voitage

Capacitor

Type

ECEA

Type

Dihers

Tolerance

ECEA:

Electrolytic

OJ

:63V

2H

:500VDC

|

C:

+0.25pF

Saeateeae

A)

ECCD:

Ceramic

1A

10V

1:

100V

J

45%

CONDE

)

ECKD:

Ceramic

1C:16V.

|

DKC:400VAC

|

K:

10%

MICROPHONE

C16

470P

ECQM:

Polypyester

1E

:25V

Z

:

+80%,

-20%

ECQP:

Polypropylene

1H:

50V

P:

+100%,

-0%

cy

ECET:

Electrolytic

1V

:35V

L.SV

ECEA

N:

Non

Polar

50

:

50V

:

Electrolytic

25

:25V

QCUQO:

Ceramic

(Chip

Type)

;

16

:

16V

7

-

Ne

Numbering

Syst

f

Resist

a

MONITOR

umbering

System

of

Resistor

J1

.

Ll

«|

Example.

(2)

(8Q)

ERD

25

F

J

101

MIC

|

Type

Wattage

Shape

Tolerance

Value

(1002)

B

ERX

2

AN

J

_2R2

Type

Wattage

Shape

Tolerance

Value

e

(2.2Q)

SPE

AKER

Resistor

Type

_

Wattage

Tolerance

ERD:

Carbon

10:

1/8W

J:+5%

|

(4Q)

ERO:

Metal

Film

12:

1/2W

ERX:

Metal

Film

25.

1/4W

ERQ:

Fuse

Type

Metal

1:1W

RRD:

Carbon

(Chip

Type)

18:

1/8W

:

REPLACEMENT

PARTS

LIST

A)

CAPACITORS

C24

ECEASOZ1

C8

0.012

shiseeeeeee

C

Se

a

=>

C4

ECFDD223MXL

RESISTORS

Hean

e

O

Gs

EGEAIASE70,

|

R1

—

ERDASFUI09.

<->

ap

HEAD

v

)

C3

ECEA1AS470

R1

ERD25FJ103

R7

12K

$2

C4

ECFDD472MXL

|

R2,3

ERD25FJ222

C5

ECEA50ZR47

R4

ERD10TJ822

:

0

~O

DV

J3

C6

ECKD1H102Z2F

|

R5

ERD10TJ103

2)

C7

ECKD1H101KB

|

R6

ERD10TJ124

a

-

DC

IN

(3V)

C8

ECFDD123MxL_

|

R7

ERD10TJ123

C9

ECKD1H271KB

R8

ERD10TJ332

a

x

BATT

C

10

ECEASOZR22.

|

RQ

ERD25FU471

(8)

=O

R

10

ERD10TJ102

C

12

ECEA50Z1

C

13

ECEA1AS101

R

1

ERD25FJ102

Bae,

|

,

C14

ECEA1CS330

R1

ERD10TJ560

5

=

C

15

ECEA1AS101

R14

ERD10TJ122

COMPARATOR

Secu

;

°

C

16

ECKD1H471KB

|

R1

ERD10TJ153

:

C17

ECEA50ZR1

R14

ERD10TJ561

D

C

18

ECEA1AS101

R14

ERD25FJ470

C19

ECEA1HS100

ERD25FJ390

eX)

C

20

ECEA0GU471

ERSB39JR40

Gera

ERD25FJ1R2

REFERENCE

‘

C21

ECFDD123MXL

ERSB15J103

VOLTAGE

C

22

ECEAS50ZR1

C

23

ECEA1AS101

ERD25FJ821

@

C23

SPECIFICATIONS

6V100

—

Part

Name

&

Description

|

eee

1kHz:

Standard

recording

input

level

INTEGRATED

CIRCUITS

oon

MIC:

-72+3dB

Saas

R22

BA515

Integrated

Circuit

250

Hz:

—4+5dB

1.2

300

(B)

AN6612

Integrated

Circuit

B

: ;

Overall

frequency

response

De

rae

TRANSISTORS

,

-

ee

es

28C202

T

E

[AN6612]

[2SB909]

1

ransistor

Playback

output

level

MOTOR

CONTROL

MOTOR

DRIVE

2SB909

Transistor

*

Use

test

tape:

More

than

0.8V

ES

TS

©

DIODE

...QZZCFM

(315Hz,

OdB)

NOTES:

MA161

Diode

e

$1-1—S1-5

......

Record/playback

select

switch

(shown

in

playback

position).

¢

Described

in

the

schematic

diagram

are

two

types

of

numbers;

the

supply

speanet

OS

2

i.

cup

ence

aineees

Power

ON/OFF

switch

(shown

in

OFF

position).

parts

number

and

production

parts

number

for

transistors

and

diodes.

_VARIABLE

RESISTORS

_

Test

tape

OVAL

cccsc

tear

bibins

Volume

control.

One

type

of

number

is

used

for

supply

parts

number

and

production

parts

RVV1F1A14

Variable

Resistor

OV

2

ines

Tape

speed

adjustment

VR.

number

when

they

are

identical.

QVNKOAA00301

Variable

Resistor

e

Resistance

are

in

ohms

(2),

1/4

watt

unless

specified

otherwise.

e.g.

Q1

K

=

1,0002.

2SC2021LNF(R,S)——

Production

parts

number

SWITCHES

¢

Capacity

are

in

microfarads

(uF)

unless

specified

otherwise.

or

2SD636H(R,S)

P

=

Pico-farads.

[2SC2021LNF]

Supply

parts

number

QS$S6222

ecb

eae

as

BA

es

ae

ec/Play

Selec

4

(Dummy

load)

All

voltage

value

Shown

in

circuitry

are

under

no

signal

condition

and

D2

.

QSB0320

PeatSwitch

playback

mode

with

volume

control

at

minimum

position.

eae.

Production

parts

number

(Play

ON/OFF)

Notes:

1.

Cut

the

speaker

lead

wire.

For

measurement,

use

VTVM.

[SM112]

Supply

parts

number

F

2.

Connect

42

instead

of

speaker.

¢(

>

)

this

arrow

indicates

the

flow

of

the

playback

signal.

¢

The

supply

parts

number

is

described

alone

in

the

replacement

parts

list.

JACKS

¢

(

m®

)

this

arrow

indicates

the

flow

of

the

recording

signal.

.

°

(

tf

)

this

arrow

indicates

the

flow

of

the

playback

and

recording

signal

in

e

This

schematic

diagram

may

be

modified

at

any

time

QJA0303

M3

Jack

(Mic/Monitor)

combination.

with

the

development

of

new

technology.

meeelee

PO

Taek

—3-

a

eee

4

CIRCUI

ELECTRE

CONDENS

MICROPH¢

J2

MONITOR

(

|

TERMINATIOQ

NOTES:

e

The

circuit

sho

the

back

side

d

e

All

voltage

val

playback

mode

For

measurem@

e

The

circuit

}

with

the

de

|

RQ-342

4

5

6

7

8

4

3

2

1

Or

eta

BOARD

AND

WIRING

CONNECTION

DIAGRAM

chet

CIRCUIT

:

.

ECKD

1H

102

z

F

.

e

ee

Type

Voltage

oe

a

i

a

ee

p

Q2

|

IC1

ECEA

50

M

R47

A

RECORD/

—

2SC2021

F(R,S)

BOWE

ANE

Type

Voltage

Peculiarity

alee.

EF

LECTR

ET

PLAY

BAC

K

BATT

=

RY

BATTE

RY

[2SC2021]

a

AL

(A

TERMINAL

(B

A

Q

A.G.C.

—

=

CONDENSER

HEAD

TERMINAL

(A)

4

(B)

Capacitor

Type

EcEA

TIRE

Aig

Tolerance

a

M

|

C

RO

P

H

O

N

E

4

ECEA:

Electrolytic

OJ

:63V

|

2H

:500VDC

|

C:+0.25pF

BLK

ECCD:

Ceramic

1A

:10V

1

:

100V

J:

+5%

ECKD:

Ceramic

1C

:

16V

DKC

:

400VAC

|

K:

10%

C16

470P

;

ECQM:

Polypyester

1E

:

25V

Z:

+80%,

-20%

RED

ECQP:

Polypropylene

1H:

50V

P:

+100%,

-0%

ee

se

Spates

aka

ascaes

ECET:

Electrolytic

1V

:35V

¥

.

ECEA

N:

Non

Polar

50

:

50V

Electrolytic

25

:

25V

7

3

QCUO:

Ceramic

(Chip

Type)

16

:16V

S2:

POWER

ON/OFF

eonrenT

YF

ie

Numbering

System

of

Resistor

TERM

|

NAL

(C)

2)

MONITOR

me

Example

:

(3)

(82)

ERD

25

F

J

101

=

|

re

Type

Wattage

Shape

Tolerance

Value

=

(1009)

B

ERX

2

AN

J

2R2

IC2

Type

Wattage

Shape

Tolerance

Value

saps

Mea

a

ee

ae

aes

i

1

|

0.05V

|

5

|

0.03V_

i

SPEAKER

es

coyeee

ef

tates

|

Toes

p24

48V

|

6

|

078v

|

ol

(42)

ERO:

Metal

Film

12.

1/2W

|

3

|

0.12V

7

|

2.35V

}

ERX:

Metal

Film

25:

1/4W

af

no

ef

eennmne

of

ERQ:

Fuse

Type

Metal

1:1W

i

Se

V

8

|

1.44V

e

RRD:

Carbon

(Chip

Type)

18:1

|/8W

Ey

ge

een

CIEL

ce

A

ee

Q3

REPLACEMENT

PARTS

LIST

pomp

|B

i

2.35V

|

Rld

©

|

C

|

1.44

|

mae

LAK

CAPACITORS

C

24

ECEA50z1

Pe

3.0V

|

R16

ny

C1

ECFDD223MXL

RESISTORS

,

560

C2

ECKD1H222ZF

°

C3

ECEA1AS470

1

ERD25FJ103

Q3

30

$2

C4

ECFDD472MXL

2%

ERD25FJ222

IC4

Leay

.

C5

ECEAS50ZR47

4

ERD10TJ822

eran

Oe

@

—

J3

Cé6

ECKD1H102ZF

5

ERD10TJ103

1

|

1.5V

|

2)

C7

ECKD1H101KB

6

ERD10TJ124

at

NE

a

DC

IN

(3V)

C8

ECFDD123MxL_

|

R7

ERD10TJ123

!

eee

cg

ECKD1H271KB

8

ERD10TJ332

ae

i

1.48V

|

BATT

C

10

ECEA50ZR22

9

ERD25FJ471

ae

ee

:

em)

1

ERDI0TJ102,—

fp

RR

mT

ow ce

Se

me

we

ws

|

4

14

45V

3V

Cis

ECKD1H102ZF

1

ERD25FJ822

J

jo

C2

ECEAS50Z1

3.

OV

C13

ECEA1AS101

ERD25FJ102

0

V

oe

7.

6

OV

‘

C14

ECEA1CS330

ERD10TJ560

ee

We

ae

—

C15

ECEA1AS101

ERD10TJ122

|

wo

gs

OV.

°

C

16.

ECKD1H471KB

ERD10TJ153

C

aon

OV

can

eearoereree

Car

ECEA50ZR1

ERD10TJ561

{|

ov

|

8

1.45V

|

C

18

ECEA1AS101

ERD25FJ470

peep.

et

ee

9

kK

9

B5V

D

C19

ECEA1HS100

ERD25FJ390

J2

som

fesse

ee

°

C

20

ECEA0GU471

ERSB39JR40

rae

ERD25Fu1R2

MONITOR

HT

|

10

2.75V

REFERENCE

C21

ECFDD123MXL

ERSB15J103

:

(11)

3.0V

|

VOLTAGE

;

BLK

AW

+

ieetitig)

ose

|

C

22

ECEA50ZR1

121

1.45V

C

23

ECEA1AS101

ERD25FJ821

ame

eee

ef

)

(2)

x

23

6V100

Part

Name

&

Description

33

INTEGRATED

CIRCUITS

DC

IN

BA515

Integrated

Circuit

AN6612

Integrated

Circuit

TER

INATIO

S

:

M

N

TRANSISTORS

IC2

Q3

pe

es

NOTES:

ji

BLK

......Black

[AN6612]

eeceuel

eS

epsie’

|

Hane

Yellow

“note

BLU

|...

Blue

E

MOTOR

CONTROL

MOTOR

DRIVE

BRN

Brown

.

0

ee

8

DIODE

Cathode

GRY......

Gray

‘

GRN__...Green

:

Cao—_}q—|_

oA

|

eee

|

meno)

piege

.

L.

BLU

...Light

Blue

ect

switch

(shown

in

playback

position).

¢

Described

in

the

schematic

diagram

are

two

types

of

numbers;

the

supply

NIL

......

No

Color

Mark

>h

(shown

in

OFF

position).

parts

number

and

production

parts

number

for

transistors

and

diodes.

_VARIABLE

RESISTORS

_

D1

ORG

...Orange

One

type

of

number

is

used

for

supply

parts

number

and

production

parts

RVV1IF1A14

Variable Resistor

PNK......

Pink

ant

VR.

number

when

they

are

identical.

QVNKOAA00301

Variable Resistor

RED

......Red

unless

specified

otherwise.

e.g.

Q1

NOTES:

.

SLD......

Shield

Wire

2SC2021LNF(R,S)——

Production

parts

number

SWITCHES

e

The

circuit

shown

in

n

the

conductor

indicates

printed

circuit

on

See

ee

VIE

sauhe

Violet

Ss

specified

otherwise.

or

2SD636H(R,S)

the

back

side

of

the

printed

circuit

board.

WHT......White

(2SC2021LNF]

Supply

parts

number

QSS6222

eee

°

All

voltage

values

shown

in

circuitry

are

under

no

signal

condition

and

YEL

......

Yellow

re

under

no

signal

condition

and

D2

|

QSB0320

—

ys

foe

playback

mode

with

volume

control

at

minimum

position.

it

minimum

position.

|

1$R35200-—_—-——

Production

parts

number

(Play

ON/OFF)

For

measurement,

use

VTVM.

[SM112])————————

Supply

parts

number

ee

;

of

the

playback

signal.

*

The

supply

parts

number

is

described

alone

in

the

replacement

parts

list.

:

JACKS

e

The

circuit

board

diagram

may

be

modified

at

any

time

F

of

the

recording

signal.

. :

es

:

;

:

of

the

playback

and

recording

signal

in

¢

This

schematic

diagram

may

be

modified

at

any

time

QJA0303

M3

Jack

(Mic/Monitor)

with

the

development

of

new

technology.

enue

penseek

with

the

development

of

new

technology.

@

ADJUSTMENT

ITEM

Head

azimuth

Tape

speed

MEASUREMENT

POINT

Monitor

jack

(8kHz,

—20dB)

Monitor

jack

MEASUREMENTS

AND

ADJUSTMENTS

@

ALIGNMENT

INSTRUCTION

READ

CAREFULLY

BEFORE

ATTEMPTING

ALIGNMENT

1.

Make

sure

heads

are

clean.

4.

Set

volume

control

to

maximum.

2.

Make

sure

capstan

and

pressure

roller

are

clean.

3.

Judgeable

room

temperature:

20+5°C

(68+9°F)

ADJUSTMENT

SPECIFICATION

POINT

Maximum

Head

adjustment

output

screw

QKMA0116S

K

10

QGT1498

K

11

XQN17B28ZF

K

12

WM034CZ

K

13

QBG1725

K

14

EAS45P111S

K

15

XSN2+4

K

16

XWC2B

K

17

QGSA0105

Speaker

A2

QYH0116H

A3

QQT3692

QPAA0107

Pad

Service

Notes

for

the

Supply

Reel

Table

(M67)

and

Reel

Table

Gear-L

(M68)

The

supply

reel

table

and

reel

table

gear-L

sandwiches

the

main

base

plate

as

shown

in

Figure

A.

When

replacing

them,

pull

hard

on

the

part(s)

to

be

replaced.

When

assembling,

refer

to

Figure

A,

and

push

the

Supply

reel

table

and

reel

table

gear-L

with

your

fingers.

base

plate

to

the

top

of

the

supply

reel

table

is

12.0mm

when

the

supply

reel

table

is

lifted.

—-

6—

Part

Name

&

Description

CABINET

PARTS

Bottom

Case

Tapping

Screw

@2.6

x

25

(Bottom

Case

M’tg)

Cassette

Lid

Assembly

Cassette

Llid

Spring

Battery

Terminal-A

Battery

Terminal-B

(+)

Battery

Terminal-C

(—)

Volume

Knob

K

2

QKFA4007S

Battery

Lid

K3

XTN26

+

25B

K

4

QKMA0115S

Main

Case

K

5

QYFA0053S

K6

QBP2028

K7

QJB0134

K

8

QJB0109

K9

QJB0147

Screw

(Volume

Knob

M’tg)

Condenser

Microphone

Mic

Rubber

Screw

(P.C.B.

M’tg)

Washer

(P.C.B

M’tg)

Main

Name

Plate

ACCESSORIES

QFTCO7L003NZ

Demonstration

Tape

Handstrap

Assembly

Instruction

Book

PACKINGS

QPNA0198

Inner

Carton

P2

XZB16X27A02_

Poly

Bag

(for

Unit)

P3

QPAA0106

Cushion

Main

Base

Plate

Assemble

so

that

the

distance

from

the

main

REMARKS

(1)

Playback

the

test

tape.

3000+90

Hz

VR2

(2)

Adjust

VR2

to

obtain

CABINET

PARTS

LOCATION

REPLACEMENT

PARTS

LIST

counter

readings

within

specified

tolerances.

Pushing

|

0

M66:

Supply

Reel

Table=

M68:

Back..@

Tension

—

Spring-L

|

M67:

Reel

Table

Gear-L

~~

REAR

SIDE

Fig.

A

Pushing

MECHANICAL

PARTS

LOCATION

(Front

View)

M64—7

M24~___

M68

a

SUPPLY

REEL

TABLE

Approx.

12mm

MAIN

BASE

PLATE

REEL

TABLE

GEAR-L

Fig.

B

NOTES:

When

changing

mechanism

parts,

apply

the

specified

grease

to

the

area

marked

show

in

the

drawing

‘“‘Mechanism

Parts

Location”

e

“x

x"

mark......

Rocol

paste

(Lubricating

grease)

¢

“OO”

mark......

Molylone

(Lubricating

grease)

e

“AA”

mark......

Dynamic

(Lubricating

grease)

e

“

“4”

mark

(Obrique

Lines)......

Aero

(Lubricating

grease)

SPECIFICATIONS

Pressure

of

pressure

roller

240+50g

SSS

£2

FFZZZSE

FEZZZ

Takeup

tension

*

Use

cassette

torque

meter......

QZZRKCT

Wow

and

flutter:

(JIS)

*

Use

test

tape

ee

QZZCWAT

Play:

35+

Vg.cm

e

FF/REW:

70

+

20g-cm

Less

than

0.5%

(RMS)

Mechanism

Operation:

Auto

Stop

nee

‘7

anaes

REPLACEMENT

PARTS

LIST

a

One!

wD

=

>

mt

tO

—

ab

ok

kk

NO

O1

RQ-342

4

MECHANICAL

PARTS

QGO2495H

Playback

Button

QML4165

Auto-stop

Lever

QMR2195

Playback

Rod

QXD0163

Takeup

Reel

Table

Assembly

QXF0248

Flywheel

Assembly

QDB0350

Flywheel

Belt

QMK2170

Lower

Base

Plate

QMR2196

Lock

Plate

QMR2197

Switch

Rod

QBT2063

Lock

Plate

Spring

QXU0376

Motor

Assembly

QXK2976

Flywheel

Retainer

Plate

Assembly

QMK2173

Head

Base

Plate

QGG0233

Head

Base

Pilate

Table

QWY0160Y

Record/Playback

Head

QXL1770

Detection

Lever

Assembly

QBC1339

Head

Adjustment

Spring

XSN2D10

XSN249

|

QXB0832

M21

QXB0833

|

QXB0834

|

QML4159

QBT2057

|

QXL1765

QML4167

QBT2060

26

QXL1768

26-1

QBT2059

27

QML4166

8

QDG1369

F

9

XUE25

|

0

1

QBT2061

|

QML4168

|

RQ-342

4

5

6

7

8

1

MECHANICAL

PARTS

LOCATION

(Front

View)

;

(Rear

View)

M45

M18

F109

Sue

M15

Re)

REMARKS

back

the

test

ist

VR2

to

obtain

iter

readings

in

specified

ances.

|

ne

&

Description

‘S

ase

d

crew

@2.6

x

25

ase

M’tg)

e

Lid

Assembly

Llid

Spring

arminal-A

2rminal-B

(+)

srminal-C

(—)

nob

lume Knob

M’tg)

r

Microphone

“16

>.B.

M’tg)

-C.B

M’tg)

e

Plate

,

D

ation

Tape

»

Assembly

1

Book

M65

on

for

Unit)

REPLACEMENT

PARTS

LIST

Pushing

|

NOTES:

Part

Name

&

Description

0

When

changing

mechanism

parts,

apply

the

specified

grease

to

the

area

M66:

Supply

marked

show

in

the

drawing

“Mechanism

Parts

Location”

MECHANICAL

PARTS

XSN2D10

Screw

©2x

10

.

QBN2093

FF

Lever

Spring

M

50

QML4163

Review

Lever

Reel

Table~

glee

peak

Rocol-pasté.

(Lubricating

grease)

Sa

a

ee

ae

(for

Head

Azimuth

Adj.)

M

33

QDG1368

Intermediate

Gear

M

51

QBG1762

Motor

Cushion

Sonat

teats

Dees

ata

99

M

1

QGO2495H

Playback

Button

M

19

XSN2

+9

Screw

@2x9

M

34

QBP2031

Cassette

Retainer

Spring

M

53

QwWY2141

Erase

Head

:

Rese

mark......

Molylone

(Lubricating

grease)

M

2

QML4165

Auto-stop

Lever

(R/P

Head

M’tg)

M

35

QBN2090

Pinch

Roller

Spring

M

54

QBMA0018

‘Speaker

Cushion

M68:

Back

©

“AA”

mark......

Dynamic

(Lubricating

grease)

M3

QMR2195

Playback

Rod

M

20

QXB0832

FF

Button

Assembly

M

36

QBN2092

Head

Base

Plate

Spring

M

55

QXK2980

Record

Rod

Assembly

eZ

=

SUPPLY

REEL

TABLE

e

“4”

mark

(Obrique

Lines)......

Aero

(Lubricating

grease)

M4

QxXD0163

Takeup

Reel

Table

M

37

QBN2094

Stop

Button

Spring

M

56

QXR1045

Pause

Rod

Assembly

Tension

|

De

Ma

arr

tes

Assembly

M

21

QXB0833

REW

Button

Assembly

M

57

QKJ0741

Erase

Prevention

Sheet

Spring-L

M5

QXF0248

Flywheel

Assembly

M

22

QXB0834

Stop

Button

Assembly

M

38

QBN2093

FF/REW

Button

Spring

M

58

QMC0157

Motor

Collar

Main

Base

Plate

Approx.

12mm

M6

QDB0350

Flywheel

Belt

M

22-1

QML4159

Eject

Lever

M

39

QBT2058

Auto

Lever

Spring

SPECIFICATIONS

M

7

QMK2170

Lower

Base

Plate

M

22-2.

QBT2057

Eject

Lever

Spring

M

40

QBC1503

Back

Tension

Spring-R

M

59

XWE19D5

Washer

(Motor

M’tg)

M8

QMR2196

Lock

Plate

M

23

QXL1765

Pinch

Roller

Assembly

M

41

XUC15FT

Stop

Ring

1.5¢

(Pinch

M

60

QBN2091

Erase

Safety

Lever

Spring

Zs

FRONT,

M9

QMR2197

Switch

Rod

M

24

QML4167

Cassette

Up

Lever

Roller

Lever)

M

61

QBN2100

Pause

Lock

Plate

Spring

Sl

SIDE

:

MAIN

BASE

PLATE

Pressure

of

pressure

roller

M

10

QBT2063

Lock

Plate

Spring

M

25

QBT2060

Cassette

Up

Lever

Spring

|

M

42

QBW2030

Poly

Washer

(Takeup

Reel

|

M

62

QBT2056

Record

Rod

Spring

051

if,

REEL

TABLE

GEAR-L

M

26

QXL1768

Takeup

Reel

Lever

Table

M’tg)

M

63

QBT2062

Playback

Rod

Spring

S

Zz

a

Takeup

tension

‘

Play:

35

+10

“cm

M

11

QXU0376

Motor

Assembly

;

Assembly

M

43

QBW2131

Poly

Washer

M

64

XSN2+9

Screw

(Erase

Head)

&

<a

*

Use

cassette

torque

;

_—

89

M

12

QXK2976

Flywheel

Retainer

Plate

M

26-1

QBT2059

Takeup

Lever

Spring

(for

Flywheel)

M

65

QBT2055

Pause

Rod

Spring

&,

Fig.

B

meter

QZZRKCT

e

FF/REW:

70+

20g-cm

Assembly

M

27

QML4166

FF/REW

Lever

M

44

QHQ1358

Screw

(Motor)

M

66

QMG1451

Supply

Reel

Table

M67:

Reel

M

13

QMK2173

Head

Base

Plate

M

45

XTNQ16C4D

Tapping

Screw

@1.6x

4

M

67

QDC1370

Reel

Table

Gear-L

:

Ree

I

W

d

flutter:

(WIS

M

14

QGG0233

Head

Base

Plate

Table

M

28

QDG1369

REW

Gear

M

46

XSN2+6

Screw

(Playback

Button)

Table

Gear-L

OW

an

utter:

(

)

Less

than

M

15

QWY0160Y

Record/Playback

Head

M

29

XUE25

Stop

Ring

2.5¢

M

47

QGO2494

Record

Button

M

68

QBC1510

Back

Tension

Spring-L

4)

*

Use

test

tape

0.5% (RMS

M

16

QXL1770

Detection

Lever

Assembly

|

M

30

QBT2061

FF/REW

Lever

Spring

M

48

QML4158

Erase

Safety

Lever

REAR

SIDE

Pushing

QZZCWAT

9%

(

)

M

17

QBC1339

Head

Adjustment

Spring

M

31

QML4168

FF

Lever

M

49

QML3950

Pause

Lock

Plate

Fig.

A

Mechanism

Operation:

Auto

Stop

ASA

cet

—

8

—

r

M

X§

LS

Printed

in

Japan

ORDER

NO.

GAD8610456S0

Al

Service

Manual

Mini

Cassette

RQ-342

Please

use

this

manual

along

with

the

original

service

manuals

for

the

below

models.

This

is

the

Service

Manual

for

the

all

areas.

GAD84065432C1

IZ

|E

|GAD84065431A2

GAD84055421C3

PARTS

COMPARISON

TABLE:

|

Please

revise

the

original

parts

list

in

the

Service

Manual

to

conform

to

the

changes

shown

herein.

If

new

part

numbers

are

shown,

be

sure

to

use

them

when

ordering

parts.

(Original)

(Supplement)

RQ-342

poms

|

Record/Playback

Head

QWY0160Y

RJHOCO8WZ

CIRCUIT

BOARD

AND

WIRING

CONNECTION

DIAGRAM

Ref.

No.

Description

Remarks

RECORD/

PLAYBACK

HEAD

MICROPHONE

!

WHT

\

‘

ELECTRET

~v

=

CONDENSER

=

CONDENSER

~~

"4

oh

MICROPHONE

a

~

an

Matsushita

Service

Company

,

=

i

50

Meadowland

Parkway,

National

/

Panasonic

ace

aa

Panasonic

Sales

Company,

Division

of

Matsushita

Electric

of

Puerto

Rico,

Inc.

Ave,

65

De

Infanteria,

KM

9.7

Victoria

Industrial

Park

Carolina,

Puerto

Rico

00630

Panasonic

Hawaii

Inc.

91-238

Kauhi

St.

Ewa

Beach

P.O.

Box

774

Honolulu,

Hawaii

96808-0774

Matsushita

Electric

of

Canada

Limited

5770

Ambler

Drive,

Mississauga,

Ontario.

L4W

2T3

Matsushita

Electric.

Trading

Co.,

Ltd.

P.O.

Box

288,

Centra!

Osaka

Japan

Y.Y

Printed

in

Japan

(N)

ORDER

NO.GAD8§)7191P2

Parts

Change

Notice

This

is

the

Service

Manual

for

the

following

areas.

[Z]...

For

all

Euaropean

areas

except

United

Kingdom.

[E}...

For

United

Kingdom.

Model

No.

RQ@-342

Please

revise

the

original

parts

list

in

the

Service

Manual

to

conform

to

the

change(s)

shown

(ORDER

NO.

GAD

8

4

0

6

9

4

3

l

A

2

)

herein.

If

new

part

numbers

are

shown,

be

sure

to

use

then

ordering

parts.

Reason

for

Change

*The

circled

item

indicates

the

reason.

If

no

marking,

see

the

Notes

in

the

bottom

column.

.

Improve

performance

8.

Other

In

rerchangeatiy

Code

**The

circled

item

Indicates

the

interchangeability.

If

no

marking,

see

the

Notes

in

the

bottom

column.

Original

or

new

parts

may

be

used

in

early

or

late

production

set.

Use

original

parts

until

exhausted,

then

stock

new

parts.

Original

parts

may

be

used

in

early

production

sets

only.

New

parts

may

be

used

in

early

or

late

production

sets.

Use

original

parts

where

possible,

then

stock

new

parts.

Original

New

parts

only

may

be

used

in

early

or

late

production

sets.

C

New

:

Stock

new

parts.

D

a

——~

_

Early

:

Original

parts

may

be

used

in

early

production

sets

only.

New

parts

may

be

used

in

late

Late

production

sets

only.

Stock

both

original

and

new

parts.

Part

Number

Model!

No.

Original

Part

No.

|

ss

New

PartNo.

—_—‘|

Notes.

Part

Name

&

Description

|

Ref.

No.

|

mt

QG02495H

QGO2495K

q

Playback

Button

|

File

this

Parts

Change

Notice

with

your

copy

of

the

Service

Manual.

ies

.

‘

i ‘

Pan

asonic

Matsushita

Electric

Trading

Co.,

Ltd.

P.O.

Box

288,

Central

Osaka

Japan

Printed

in

Japan

©)

Sten

a

aoe

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