JVC RC-545L User manual

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MODEL

RC-545L/LB

FM-SW-MW-LW

4-BAND

RADIO

STEREO

CASSETTE

RECORDER

No.

1388

February

1979

RC-545L/LB

|

Contents

Page

SPECICATION

5.55.

iss

reich

OR

ie

iw

vee

ele

SSR

Ree

area

tego

el

wes

ulate

cay

hte

hatder

WHE

dace

dlanit

Wt

bas

ibe

Gates

2

Main

Parts:

Locationic:

agen

ciscs.

Sone

d

Ae

far

lacs

ete

Be

BG

Shad

02

9

ale

eds

Wig

Uden

an

wane

Sl

ar

at

Bi

ws

Wye

SOS

Rane

owas

3

Disassembly

&

Replacement

........-

02.

ee

ee

ee

ees

4,5

Tier

AV

geareb

erat

a

seisi

8d

aes

fos

boogaloo

oa

SRL,

ral

aing!

og

las

Wane

4

wh

el

eet,

SERN

Ai

wie

ald

Arisa

wie

ae

6,7

Adjust

Recording

Bias).

ic:

55

Gi

ee

Cee

ee

ee

eae

Ee

eee

8

Se

Ne

oe

Eee

Sa

ewe

Se

8

Adjusting

Head

/AZimuth:

326...

oe

ele

Be,

ere

a

Reig

cece

title

eee

ele

eee

io

Shee

ies dae

Le

8

How’

to

Fit

Dial

Cordes

6

iis

ib

eas

6

eb

eos

BE

Pe

eee

ew

OW

Oo

aS

Oa

Re

ae

ne

bee

ea

Se

ee

OA

9

Adjustment

of

Cassette

Mechanism.

..

2.2...

0...

ce

ee

eee

10,11

Block:

Diagram

2:

ix¢.s:

pats

worse

ie

es

Se

Set

eats

A

Se

ETS

Eee

OS

Ete

Os

as

ee

eg

ee

12

Wiring

COnmection..-co5c5

she.

oe

She

-dae

Betas,

Bua

hee

ia

as

Aa

ee

ete,

SOR

Sag

MB

aed

Lgeee

dd

-p

Oreerer

ed

ala

was

13

Schematic

Diagram

of

RC-545L/LB

(Tuner)...

1.0...

ce

eee

teens

14

Schematic

Diagram

of

RC-545L/LB

(Amplifier)...

2.0...

ee

ee

eee

15

Tuner:

Circuit:

Board:

Ass

'Voiitec.5.

6

sa

cen

sie

hae

Sone

ee

BASS,

Se

BALLS

Ape

eae

2

a

oe

RA

ee

eels

18,19

Exploded

View

of

Cassette

Mechanism

.........0

2...

eee

ee

eee

eee

eee

tenes

20

List

of

Cassette.

Mechanism

ii

ci

ccs

ice

ek

dae

wd

eee

CG

ek

a

wa

i

See

Ae

a

21

Connector:Circuit

Board)

Assy

25.

aoa

86 ee

Oe

eh

Se

ee

ee

SER

AE

OBA

EA

22

LED

Circuit

Boatd

Ass’y.

i.

cea

aces

cele

Sadho

ee

es

MORN

eR

ERE

ow

ede

ee

a

seed

ee

aoe

22

Power

Supply

Circuit

Board

Ass’y

......

0...

ee

eee

ee

ee

ee

ee

ee

eee eee

eee

22

Exploded

View

of

Tuner

Chassis

Ass’y

..

2...

2.

ec

ee

tee

eee

eee

23

Exploded

View

of

Amplifier

Section...

....0..0

0.0.0.0.

cc

ee

ee

ee

es

24,25

Exploded

View

of

Front

Cabinet

....

0...

2.0...

00

cee

ee

ee

ee

ee

ee

ee

26,27

Exploded

View

of

Rear

Cabinet

(RC-545L)

0...

ce

ee

eee

eee

nen

e

eee

28

Exploded

View

of

Rear

Cabinet

(RC-545LB)

.

1...

0...

ce

ee

ee

eee

29

Final

Packing

Ass’y

(RC-545L)

2.0...

ee

ee

eee

eee

tenes

30

Accessories.

(RE-S45

Ey

iso:

0s

/aa/c

wale

cine

ali

f

daa

de

a

ae

ale,

BARS

be

os

ee

eS

ee

OOH

Ca

aa

30

Final

Packing

Ass’y

(RC-545LB)

2... 0...

ce

ee

ee ee

eee

ee

eee

ee

ene

31

Accessories

(RC-545LB).

0...

ee

ee

ee

ee

eee

ee

eee

eens

31

Specifications

DIMENSIONS:

9-1/2"

TUNER

SECTION

Frequency

Ranges

RECORDER

SECTION

Tape

Speed

Track

System

Recording

System

Erasing

System

S/N

Ratio

Fast

Forward

Time

Rewinding

Time

Wow

&

Flutter

AMPLIFIER

SECTION

Speakers

No.

1388

24.1cm(H)

x

42.4cm(W)

x

11.4cm(D)

x

16-3/4"

=

x

4-1/2”

FM

88~108MHz

SW

6~18MHz

MW

540~1600kHz

LW

150~350kHz

4.8

cm/s

(1-7/8

ips)

4-track

2-channel

stereo

AC

Bias

DC

Erasing

More

than

40dB

at

1kHz

Within

90

sec.

(C-60

cassette)

Within

90

sec.

(C-60

cassette)

0.14%

(WRMS)

12cm

(5)

x

2,

3.22

WEIGHT:

Approx.

Power

Output

Input

Jacks

Output

Jacks

Input/Output

Jack

POWER

CONSUMPTION

:

SEMICONDUCTORS

ICs

Transistors

Diodes

POWER

SOURCE

DC

AC

4.5

kg

(with

batteries)

9.9

Ibs.

Max.

5.4W

(2.7W+2.7W)(DC)

4W

(2W+2W)(DC)

at

10%

THD

MIC

x

2

(0.8mV,

low

imp.)

Ext.

Speaker

x

2

(3.2~8Q)

Headphones

x

1

(80)

DIN

12W

(RC-545L)

9.5W

(RC-545LB)

5

+

2

(Microphone)

10

+

2

(Motor

governor)

14

9V,6

R20”,

“U2”

cells

or

equivalent

110/220/240V,

50/60Hz

Main

Parts

Location

RC-545L/LB

Fig.

1

Fig.

2

Ref.

No.

Parts

No.

Parts

Name

Description

|

O’ty

1

*VXL4045-001

Knob

VOLUME

1

2

*VXKM520-30012

"

BALANCE

1

3

*VXKM520-30012

tf

TONE

1

4

VXL4021-001

ut

Tuning

1

5

VXKM520-20010

i"

FINE

TUNING

1

6

*VJN4022-001

Pointer

1

7

*VQB012B-303

Bar

Antenn

Ass’y

L4,5

1

8

a

Circuit

Board

Ass’y

Tuner

1

9

.

"

Amplifier

1

10

*

"

Connector

1

11

_

Cassette

Mechanism

Ass‘y

1

12

EAS12P126SH

Speaker

12cm(5"’),

3.2Q

2

13

*V/DM5049-004-002

Connector

&

Wire

Ass’y

CN1-S

1

14

*\V/DM5049-004-001

"

CN304-S

1

15

*V/DM5049-004-004

”

CN303-S

1

16

*VDM5049-004-003

u

CN302-S

1

Note:

1,

|

Asterisked

parts

(*)

show

“NEW

PARTS”.

Other

parts

are

all

“CURRENT

PARTS”;

therefore,

check

your

inventory

and

order

situation

before

placing

new

order

to

avoid

making

extra

stock.

The

circuit

board

assemblies

and

whole

assembly

of

cassette

mechanism

in

this

model

will

not

be

available

as

spare

parts.

The

parts

marked

\

are

the

important

parts

for

safety

assurance.

Use

the

specified

part,

when

replacing

the

safety

assurance

part,

never

use

an

equivalent

one.

No.

1388

RC-545L/LB

Disassembly

&

Replacement

A.

Rear

Cabinet

1.

Remove

the

battery

cover.

2.

Remove

7

screws

(1)~(7):

SDSB3020R.

3.

Disconnect

3

connectors

from

the

rod

antenna

(white)

and

power

supply

section

(red

&

black).

C.

1

2.

3.

Amplifier

Circuit

Board

Take

off

the

volume,

balance

and

tone

control

knobs.

Disconnect

3

connectors

(B),

(C)

&

(D).

Remove

5

screws

(10)~(13):

SPSP3006VS

and

(14):

SBSB3014C.

Fig.

3

B.

Tuner

Section

1.

Set

the

tuning

dial

to

the

minimum

frequency.

2.

Take

off

the

tuning

and

fine

tuning

knobs.

3.

Disconnect

the

5-pin

connector

(A)

from

the

amplifier

section

and

a

connector

to

the

speaker

terminal.

4.

Remove

2

screws

(8)

&

(9):

SBSB3025C.

Note:

Engage

the

pointer

on

the

front

cabinet

with

the

pointer

holder

on

the

tuner

chassis,

as

the

pointer

separates

from

the

holder

by

removing

the

turer

section

from

the

cabinet,

when

mounting

the

tuner

section

on

the

cabinet.

For

details

refer

to

page

9.

Fig.

4

No.

1388

Fig.

5

D.

Amplifier

Section

(with

Cassette

Mechanism)

BRWN

.

Take

off

the

volume,

balance

and

tone

control

knobs.

.

Disconnect

4

connectors

(A),

(B),

(C)

&

(D).

.

Remove

5

screws

(14)~(18):

SBSB3014C.

Open

the

cassette

case

by

depressing

the

STOP/EJECT

button

to

disengage

the

internal

mechanism.

Fig.

6

RC-545L/LB

E.

Cassette

Mechanism

G.

Power

Supply

Section

1.

Remove

the

amplifier

section

in

accordance

with

the

Remove

2

screws

(21)

&

(22):

SBSB3014C.

item

D.

2.

Remove

4

screws

(10)~(13):

SPSP3006VS.

3.

Desolder

wires

from

the

motor,

heads

and

leaf

switch

on

the

cassette

mechanism.

Fig.

9

H.

Component

Parts

of

Cassette

Mechanism

The

cassette

mechanism

of

RC-545

is

the

essentially

the

same

as

of

RC-525

and

RC-323.

Refer

to

the

service

manual

of

RC-525

or

RC-323.

Fig.

7

F.

Jack

Board

1.

Remove

the

amplifier

circuit

board

as

following

the

item

C.

2.

Remove

2

screws

(19)

&

(20):

SBSB3010Z.

Fig.

8

No.

1388

RC-545L/LB

Tuner

Alignment

Output

Measuring:

AM

IF

&

RF

Alignment

Speaker

terminal

(Impedance

=

3.2Q),

output

level

50mW

(0.4V/3.2Q

)

Input

(SSG}

Modulation

400Hz,

Modulated

to

30%

[

Step

Frequency

Input

Signal

Place

to

be

Set

the

V.

Band

Frequency

Given

to

aligned

Capacitor

to

1

MW

Loop

Antenna

T2,3

Minimum

—_

2

(1F)

Repeat

the

Step

1,

and

adjust

for

no

further

improvement.

4

360KH2

panei

To6

5

LW

Repeat

the

Steps

3

&

4.

6

L4

160kHz

Signal

8

|

|

Repeat

the

Steps

6

&

7,

and

adjust

for

no

further

improvement.

Q

520kHz

L8

Maximum

16B0KH2

eee

TC7

11

Repeat

the

Steps

9

&

10.

a)

MY

|

eoone

yarns

13

14

Repeat

the

Steps

12

&

13,

and

adjust

for

no

further

improvement.

17

or

Repeat

the

Steps

15

&

16.

S.OMAZ

|

Fod

Antenne

through

19

Dummy

Antenn

ND

ie)

FM

IF

&

Discriminator

Alignment

Input

(Sweep

Generator)

Output

(Oscilloscope)

:

TP3

(hot)

IF

Discriminator

Repeat

the

Steps

18

&

19,

and

adjust

for

no

further

improvement.

TP4

(hot)

&

TP7

TP6

(hot)

&

TP7

Mode

Place

to

be

aligned

Wave

form

T1,4

Peak

TS

S-curve

Step

1

IF

2

Discriminator

No.

1388

RC-545L/LB

FM

RF

Alignment

Input

(SSG):

Use

75Q

terminal,

modulation

400Hz

modulated

to

22.5kHz

deviation,

Connect

Hot

side

to

TP1

and

Cold

side

to

TP2.

Step

Frequency

Input

Signal

Place

to

be

Set

the

V.

87.5MHz

Maximum

P

109MHs

TP1

&

TP2

TCA

Repeat

the

Steps

1

&

2.

z

TP1

&

TP2

L2

90MHz

Signal

106MHz 106MHz

Signal

Repeat

the

Steps

4

&

5,

and

adjust

for

no

further

improvement.

FM

MPX

Alignment

Dummy

Antenna

A.

Regular

Method

1.

Connect

a

frequency

counter

to

the

test

point

TPS.

2.

Supply

the

monaural

signal

(98MHz,

60dB)

across

the

test

points

TP1

and

TP2.

3.

Adjust

the

variable

resistor

VR1

so

that

the

frequency

becomes

19kHz

+

100Hz.

B.

Simplified

Method

.

Tune

to

a

FM

stereo

broadcast.

2.

Set

the

variable

resistor

VR1

to

a

center

position

of

the

range

where

the

stereo

indicator

keeps

lighting.

=

Ri

+

R2=

800

C

=

10pF

R1

:

Output

impedance

of

S.S.G.

Fig.

10

Parts

Arrangement

for

Alignment

No.

1388

RC-545L/LB

Adjusting

Recording

Bias

Bias

Frequency

Bias

Current

1.

Connect

a

frequency

counter

across

TP101.

1.

Connect

a

V.T.V.M.

across

TP101

and

TP201.

2.

Set

the

BEAT

CUT

switch

to

left

position.

2.

Adjust

the

variable

resistor

VR101

(L)

and

VR201

{R)

3.

Adjust

the

oscillator

coil

L301

so

that

the

counter

so

that

the

voltage

becomes

4.5mV

(450uA/109).

indicates

68kHz.

VR201

©

©

1O)

@

TP101

Fig.

12

Adjusting

Head

Azimuth

Regular

Method

1.

Connect

a

dual

channel

oscilloscope

to

the

speaker

terminals.

.

Set

the

MODE

switch

to

the

STEREO

position.

.

Playback

the

test

cassette

for

azimuth

adjustment.

4.

Adjust

the

head

azimuth

so

that

the

output

signals

of

left

and

right

channels

will

become

maximum

and

in

WN

phase.

Note:

If

a

single

channel

oscilloscope

will

be

used,

apply

the

left

channel

signal

to

the

X-axis

and

the

right

to

Output

the

Y-axis

and

draw

the

Lissajous

figure.

Simplified

Method

1.

Connect

a

V.T.V.M.

across

the

speaker

terminal.

2.

Set

the

MODE

switch

to

MONO.

—m

Angle

3.

Playback

the

test

cassette

for

azimuth

adjustment.

4.

Adjust

the

head

angle

for

maximum

output.

Note:

The

output

voltage

shows

three

peaks

while

adjusting

head

angle

as

illustrated

on

the

right

adjust

for

maximum

peak.

5.

Check

that

the

output

difference

between

MONO

and

STEREO

is

within

3dB.

No.

1388

Fig.

13

’

RC-545L/LB

How

to

Fit

Dial

Cord

A.

Fit

the

dial

Cord

1.

Dial

Cord

Material

:

Tetoron

Diameter

of

cord

:

0.6mm

(24

mil)

Whole

length

of

cord

:

775mm

(30-1/2’’)

.

Turn

the

dial

drum

fully

clockwise.

.

Fit

the

cord

in

numerical

order

as

shown

in

Fig.

14.

.

Fix

the

pointer

holder

to

the

cord

and

adjust

the

starting

point.

a.

Turn

the

dial

drum

fully

counterclockwise.

b.

Set

the

left

edge

of

needle

holder

to

the

projected

marking

on

the

chassis

as

shown

in

Fig.

15

and

fix

the

cord

to

the

holder

by

lock

paint.

PWN

B.

Engaging

the

pointer

with

the

pointer

holder

.

Set

the

pointer

holder

to

the

minimum

frequency

by

turning

the

dial

drum

fully

counterclockwise.

2.

Set the

pointer

assembled

on

the

cabinet

to

the

projection

POINTER-~—>

on

the

cabinet

as

shown

in

Fig.

16.

HOLDER

3.

Mount

the

tuner

section

on

the

cabinet

and

engage

the

|

pointer

with

the

holder.

=

MARKING

Fig.

15

POINTER

PROJECTION

Fig.

16

Aigew

No.

1388

RC-545L/LB

Adjustment

of

Cassette

Mechanism

Play

Timing

1.

In

the

playback

mode,

the

clearance

(A)

between

the

pinch

roller

arm

and

the

stopper

of

head

base

should

be

within

0.2

to

0.3

mm.

If

the

clearance

is

beyond

the

limits,

bend

the

part

(B)

of

pinch

roller

arm

to

adjust

the

clearance

as

shown

in

Fig.

17.

Pinch

Roller

Arm

Stopper

(Head

Base)

0.2

~0.3

mm

Fig.

17

2.

Check

to

see

that

the

take-up

idler

turns

at

the

same

time

as

the

pinch

roller

or

the

take-up

idler

turns

first

and

then

the

pinch

roller

turns,

when

the

PLAY

button

is

pressed.

a.

If

the

pinch

roller

turns

very

later

than

the

take-up

idler,

bend

the

part

(C)

of

head

base

which

is

contacted

with

the

take-up

idler

by

the

part

(D)

to

the

(E)

direction

as

shown

in

Fig.

18.

b.

If

the

take-up

idler

turns

later

than

the

pinch

roller,

bend

the

part

(C)

to

(F)

direction.

Head

base

Take-up

Idler

Fig.

18

No.

1388

Cue

&

Review

Mechanism

1.

Timing

of

Cue

Action

a.

In

the

playback

mode,

check

to

see

that

the

take-up

reel

disk

stops

turning

after

the

pinch

roller

has

stopped

turning

or

stops

at

the

same

time

and

then

the

mechanism

becomes

fast

forwarding

mode

when

the

CUE

button

has

been

pressed.

b.

If

the

timing

is

out

of

order,

adjust

it

as

following

the

item

2

of

‘Play

Timing”.

2.

Timing

of

Review

Action

a.

In

the

playback

mode,

check

to

see

that

the

take-up

reel

disk

stops

turning

after

the

pinch

roller

has

stopped

or

stops

at

the

same

time

and

then

the

mechanism

becomes

rewinding

mode,

when

the

REVIEW

button

has

been

pressed.

b.

If

the

timing

is

out

of

order,

adjust

it

as

following

the

item

2

of

“Play

Timing”.

Pause

Timing

In

the

playback

mode,

check

that

the

PAUSE

button

is

locked

and

the

mechanism

temporarily

becomes

stop

mode

when

the

PAUSE

button

has

been

pressed,

and

that

the

button

is

released

and

the

mechanism

becomes

playback

mode

when

the

button

has

been

pressed

again.

If

the

mechanism

becomes

fast

forwarding

mode,

when

the

PAUSE

button

has

been

gradually

pressed,

bend

the

part

(G)

of

pinch

roller

arm

to

the

arrow

direction

to

adjust

that

the

take-up

reel

and

the

pinch

roller

stops

at

the

same

time

as

shown

in

Fig.

19.

Pause

Bar

Pinch

Roller

Arm

Fig.

19

40's