Clarion RU-348, RU-348A Service Manual

'n

l,j

MODEL

r"o,i."nr,

Ql_;{RION

3, Koiimachi

Succursl6 outru-mer:

GLARION SHOJI

5-chome. Chiyoda-ku, Tokyo.102 J.p.n l.l.:

CLARION SHOJI CLARION CORPORATION OF AilIERIGA 55oo CLARION CORPORATION OF AMERICA. EASTERN CLARION CLARION CLARION

(MALAYSIAI

DC) BRASIL INDUSTRIA E

(HONG

CO., LTD./e,m,r"tion., CLARION SHOJI

(EURCIPAI

CO.,

KONGI

MODEL

G.M.B.H.

LTO.

{U.S.A.I

SON. BHO. 9l/2 m.s.

LTD. 225 Ping

CO,,

RU.3484

2931 TGl.x:

{2651

2OOO H.mbu.g 76.

55oO Ro!.cr.os

B.y.n

COMERCIO

Chru

J22908. J22152 CLAnISHO

Sch6n. Aussicht 35.

Avc.. Lrwnd.t..

nosacrlns Avc..

t.pts, P.n.ng. Mrlaysia Tcr.:697-206.897-334

LTOA. c.ira Postlt

G.tt.ry, Occ.n T..min.t.

RU-348A.E}

LTD.

CO.,

Wort Gcrmenv. r.t

C.tif.. 90260 U.S.A. Tct.:

L.wndste.

DIVISION

c.tit..

421

5033. sao

Kowtoon. H

213-973-fiOO

90260

U.s.A. TGt :

Norrh M.dtand ave..

pauto.

j

Tct.

K

3-675785 Tolex: HK492

reter 41214969

2zo.r66t

T.tex

2t3-973rloo

saddte Brook. N J. 07662

Tctex: PG 255

B.asit r.t.:

32-sl6l reter: 3821123

€6.4447

T6tex

66-4447

(Pcnans)

2

MODEL

u s A r.t

RU.348B

2ol-7el.12oo rct€x 138os

SPECIFICATIONS

Circuit SVstem:

Tuning

System:

Receive range:

I ntermediate

Maximum

Practical

lmage

lF rejection

lF

%

AFC:

AGC

rSelectivity:

Limiter sensitivity:

ST I ndicator

ST

Separation:

Electrical

frequency:

sensitivity:

rejection ratio:

ratio:

rejection

ratio:

FOM:

sensitivity:

fidelity:

Superheterodyne

p-tuning

Manual

system.

AM

53OKHz

FM

88MHz

AM 452.5KH2

s-push button

1605KHz

-

108MHz

-

FM 10.7MHz AM Less than FM

Lessthan

AM Less

FM

Less than

AM More than

FM More

AM More than

FM More than 70dB FM

More than

FM 4O0KHz

AM Less than

More

AM

detune)

FM Less than FM

Less than

FM More than

100H2

AM

22dB

18dB

than

24dB 'l8dB

60dB

than

35dB

4OdB

60dB

700KHz

-

26dB

than 2OdB

30dB 30dB

20dB

H L

4000H2

H L

FM

100H2

H

L +3+3dB

7000H2

H

L

(at

S/N 2OdB)

(at

S/N 30dB)

(at

t

{400H2)

+4r3bB

+7+3dB

-15+sdB

-26t5dB

+2+3dB

-15tsdB

-28tsdB

IOKHz

impedance:

Load

Power

output:

Power

Dimensions:

Weight:

supply

voltage

Semiconductors:

FM

RF amplifier Frequency mixer Local oscillator AFC

I F

amplif ier

etector

D

Pre

amplif

MPX

AM

RF amplifier

Frequency

lF

amplif AGC Detector

Audio output

Voltage

ier

converter

ier

amplifier

regu lator

4f2,

(for

4W x More

DC.14.4V

gro

u nd

width

H eight

Depth

1.2k9

2

than

6W

{11V

2SC1342 2SC535B 2SC461B

.0130-00x

oo1 2SC46OB

1-O020'00x

00

2SC460B

10%

x

160m/m

50m/m

120m/m

051-0O56-00.01x 2

2SC460B

O01-O095-O0

2SC454B 2SC454B

0O1-00'10-00

0O1-OOIO-OO

051-0036-02. O3

(HA-r

322)

OO1-O099-Ol x 1 {H278)

distortion)

(f

or max. volume)

2

16V) Nagative

-

x

1

x

1

x 1

(152790wT)

1

4

x

(tN6OP)

2

x

1

x 1

(152O76)

x 1

x

1

x 1

(1N34A)

x

1

(1N34A)

x

1

x

2

l P,int"d

.

in Jooon 298-17 Rs

-oott

lilllllll'I

*

COMPONENT

VIEW:

RU-348A-01

Main unit

280-334400

Owners

guide

3004976{)0 Mounting bracket 1

Parts

921-6232-00

,A

fLal]l

@@€]€)",

734-5016,3t

jseus,sex-eour

o

E[

ev

El

\J

,'

734-50tO-3t

D-sEMs-HEX-BoLT

bag

(_<in

xi

vl

v

oa5-@ro-3t

NOISE.SUPPAESSOR

1 1

723,so@-tl

HEX_NUT

x,

74o-so@_lo

FLAT

WASBEF

922-O778fi

@

*333m

KNOE

RU-3488-01

280-3326-00

921€194{P

722-0231-OO

SPECIAL

*

FEATURES: o o

of monolithic

Use

highquality

Considering

transistors capable of operating both at temperature are used.

o

operation

Stable

fluctuation

Partsbag

*33Hl

KNOB

Main

unit

Ownersguide

Parts

bag

NUT

power

reproduction variations in climatic conditions, superb silicone

using

by

and

is

assured

a constant-voltage diode.

N

74ffi.{

sP€OAL

@-,

745-0430-Ot

WASHER

SPECiAL

in

lC

the audio section

high reliability.

against

WASER

high as

power

well

supply

assures

low

as

voltage

*

ADJUSTMENT

1.

Adjustment of AM

1-1 lnstruments required

stand€rd signal

AM

lF

AM

Oscilloscope

Dummy VTVM Dummy

siveep

load

antenna

METHODS:

tuner

generator

(see

(452.5KH2)

below

generator

(4Ql

(SSG)

F ig.

o---l

1 .l

-2-

Fig. 1l

Adjustment

1-2

-1.

Connect

oscilloscope's

knob of the set

When the sweep

2.

452.5KH2

as shown

Keep the

gain

vertical

the

Adiust

3.

1-3 Tracking

of the waveform

height

adjustment

Apply the output of

load-

the

Bring

point

on the

Adiust the OSC trimmer

Next set the

receiving frequencyl,

adjust

L4

2

3 times

-

52OKHz

Now adjust the

(TC5)

becomes maximum.

15

The

position.

2.

Adjustment of FM

2-1 lnstruments

FM

Oscilloscope

Dummy load VTVM

Adjustment

2-2

1.

2.

-

on the same

20dB output of

-

volume

standard signal

lF

sreep

Connect

oscilloscope's vertical terminal to TP2.

Turn the tuning

With the sweep

the output

when

gradually

on the CRT screen.

perform

Now

Keep the FM SSG vertical

3. Adjust

the

of

waveform

Adjust

the waveform.

4.

Connect

Adiust

good

symmetry

of lF

Section

the sweep

vertical

generator

terminal to TP6.

fully

clockwise.

generator

is increased, a waveform

and its output

in Fig-

2

output

oscillosc()pe

of

of I FT4 and

cores

set's dial

dial and set

dial

to receive this

that the receiving

so

1620KH2.

ANT

level

is obtained.

of

as small

SSG

pointer

set the

trimmer

frequency

SSG

large

as

lFT5 of obtain

good

with

to the set through dummy

the

to

the

AM SG

(TC6l

to

receive

to the left end

SSG

signal. Repeat these adiustments

(TC4)

so that the

is

suitable

and tone controls must

tuner

required

generator

(4Sr)

of lF

section

the

sweep

knob of the set

generator

increased,

following

the

gain

of oscilloscope

the core

(green)

with

(blue)

core

the

vertical terminal of oscilloscope

the

the core

(black)

of the s-curve.

(SSG)

(10.7MH2)

generator

level

of

waveform

output as

of lFTl

good

of lFT3 for

frequency set

the sareep

shown

adjustment.

small as

large

as

symmetry.

output

f requency

as

symmetry.

maximum

Turn

possible

possible.

as

the tuning

is

set

and

maximum

frequency

TPS and

to

to 1620KH2.

162OKHz-

(minimum

signal to

520KHz,

band width

becomes

and RF trimmer

output

Audio

for

adiustment.

the

at maximum

be

output to TPI and

fully clockwise.

of 10.7MHz

generator

in Fig.

as

for

maximum

possible

possible.

appears

3

and the

height

to

good

linearity and

to

the

and

TP3.

2-3

Tracking adjustment

1.

Turn the

receiving

Adjust the

from

2. furn the

output

the

obtain

At this time,

knobs

2-4 MPX

1.

Turn the Connect the

apply calibration

Adiust

Lissajuous

(

lf

and adiust

19.OKHz).

-Adiustment

oscillator

2. Connect the

the

Turn the

Set the

Adjust the

counterclockwise.

indicator

-Adjustment

3. This

performed

The clockwise

wise direction.

is

tuning knob fully

f requency

OSC trimmer

the FM

SSG.

tuning knob

of FM

SSG

ANT trimmer

maximum

audio output.

the volume

must be at maximum

section adjustrnent

ST-MO witch OFF.

oscilloscope vertical input

precalibrated

a

use

signal)

the

semi-f

waveform becomes almost

frequency

a

counter is available,

VR5 so that the frequency

of the

(vco)-

specified

adjustment of lamp

sensitivity increases

stereo modulator to modulation

ST-MO sryitch ON.

SSG output to about

semi-fixed control VR4

lights.

of lndicator lamp

after the adjustment

and increases

position).

ro

(TC1)

counterclockwise

(TC3)

receive

to

approximately lOdB

and RF trimmer

control and tone

position.

(Monoral

19KHz

signal

to

the horizontal input.

ixed

control VR5

frequency

depth

(Stereo

25d8.

direction to a

sensitivity-

(lighting)

when

VR4 is turned

when VR4 is turned

receive

to

98MHz.

(stereo

connect it to

becomes

of voltage controlled

FM

(pilot

receptionl.

by turning it in the

position

sensitivity must

of VCO frequency.

(lowest

87.5MHz

the

Set

and adjust

(TC2)

control

reception).

to

TP.4 and

modulator

so that the

stationery.

TP.4

exactly

and

SSG

signal 7.5KHz).

set to

where the

counter-

to clock-

ST

to

be

t

Betore

adjustrnent

of

Does not

Lissajuous

(TP.4

form tion

use

19KHz

become

figure

outputl and

perfectly

is formed

signal).

Alter

adiustrnent

round

the

by

sinusoidal waveform

because

rectangular

lFis.ql

the

wave-

(calibra-

ffi

*

TROUBLESHOOTING:

(Refer

to the circuit

diagram

and

printed

board.)

Symptom

No sound

Sound poor

Sound

Abnormal (motorboating,

at all

is low or sensitivity

is

distorted

sounds

osillation)

is

Power

supply

circuit

AF

AM section

FM section

circuit

AF

AM section

FM section

AF circuit

section

AM

FM

section

circuit

AF

AM section

FM section

Faulty

circuit

cause of

Place,

a

Fuse open

a o a o

O ta

a o o o o

o o o o o

O

a

o

o a

I o o

3 o o o . o

I a o o

'

a o a

I a

3

o o o

a

o '

a O o

capacitor

Bypass

(choke)

T1

(coil)

L.t

Cso,

n6-470l,

n

R75

Rr:.

Zeener diode

Speaker

capacitor

Bypass

(10-lOOO)

Ctd,

e1

(051-0036-02,

tC2,

r

lFT4,5

Os,

ro, 1l

TCa,

s,6

coil

Tuner

Ccq, Cqs,

C+r,

lFT1,2,3open

faultY

O1

s

-

Tuner coil

(051-0056-o0)

lcr

CCTa,

5

(051-0036-02,

lCz

3

Cto

el

qz

Ctt

TC+,

5, 6

open

coil

Lr

Oq,

to, ll

lFTq,

5

(1520761

Dq

coil open,

Tuner

TCr,

2,

Ot

Sdeteriorated

-

lFTr,

3

coil open,

Tuner

Dz,

deteriorated

3

ANT shield wire

FM

AM,

receptacle contact

ANT

(O51-0036{2,03)

lCz,3

Speaker

R+e, Rr:,

lCr

Os,

faulty

Dz,

g

faulty or short

CCT:

Cqo, C9?

Cgr,

(051-0036O2,

lC2,

3

C+s, Css, Cso,

Cqq,

Csz,

33,

Each

bypass

Fach clecouolino caoacitor faultv

capacity down

C9s

short

open

oPen

(D7)

,

Ce3

short

faulty

lead open

short

faulty

open

faulty

short

(Ll

open

)

C5s

open

faultY

(10-10OO) (5O-11

misad.iusted

misadjusted

3

misadjusted

s

capacity

leaking

deteriorated

etc.

etc. ooen

,atch taulty

faulty

Ds, D5s

(051-0056-O0)

capacity down

94

capacity

faultY

faulty

faultY

fault

(1O-330)

faultY

O3)

O3) short

down

or short

faulty

short

faultY

faulty

03)

Css, C51

faulty

faultv

or

faultY

faulty

faultv

Action

Replace Replace Replace Replace Replace Replace Replace

Replace Replace Replace Replace Replace

Replace Replace

Replace

Read.iust

Replace Replace Readjust Replace Replace

Readjust

Replace

R eadj usl

Replace Replace Replace

Heprace

Replace

Replace Replace

Replace

Replace Replace Replace

Replace

Replace Replace Renlace Replace

lndicator does

Stereo offect is absent

not light

MPX section

3

VR+,

a

SWr

o

C:+,

I

PLz, R46

o

Cso,

I

Rea,

misadjusted

s

faulty

capacity down or

Ca?

Caz, Crs,

R37

oPen

or faultY

C36 faulty

faultY

Readj ust

Replace Replace Replace

Replace Replace