Kenwood T-93 User manual

FM/AM

STEREO

SYNTHESIZER

TUNER

T-93/93L

KENWOOD

SERVICE

MANUAL

PRINTED

IN

JAPAN

B51-3958-00(T)

1702

Metallic

cabinet

(AQ1-)*

Panel

(A20-)*

Front

glass

Foot

(Front)

(B10-1033-03)

(JO2-1040-05)

x

2

Power

cord

bushing

(J42-0083-05)

Miniature

phone

jack

(SYSTEM

CONTROL)

(E11-0188-05)

Phono

jack

(OUTPUT)

(E13-0249-05)

CAUTION.

ATTENTION

KENWOOD

CORPORATION

BOOK

MAE

2S

JAPAN

Foot

(Rear)

pa

a

cord

(JO2-0366-15)

x

2

Lock

terminal

board

(ANTENNA)

(E20-)*

*

Refer

to

Parts

List

on

page

44.

Photo

is

T-93L

POWER

TRANSFORMER

(L01)

PHONT

END

NEC!

MODEL

NAME

TUNER

UNIT

(X05)

DISPLAY

UNIT

(X14)

T-93

(J)

X05-3780-20

X14-2620-21

LO1-5454-15

X86-1040-10

T-93

(J)

X05-3780-71

X14-2620-71

LO1-65452-05

X86-1040-10

T-93L

(J)

X05-3782-71

X14-2622-71

LO1-5452-05

X86-1052-70

T-93L

(J)

X05-3782-72

X14-2622-72

LO1-5452-05

X86-1052-70

T-93

(S)

X05-3780-21

X14-2630-20

LO1-9004-05

X86-1130-10

T-93

(S)

X05-3780-72

X14-2630-71

LO1-9002-05

X86-1130-10

T-93L

(S)

X05-3782-73

X14-2632-71

LO1-9002-05

X86-1122-70

T-93/93L

CONTENTS

CONTROLS

AND

INDICATORS..............

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3

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16

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DIAGRAM

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18

FUNCTION

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CIRCUIT

DESCRIPTION

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27

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SCHEMATIC

DIAGRAM

(1-93)

.......0

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35

IC1:

CXP50112-0100

(X14-)

SCHEMATIC

DIAGRAM

(T-931L)..........cccc

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39

MICROPROCESSOR

..............cccescceee

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8

EXPLODED:

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daiwisiewes

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caves

die

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ee

43

IC1:

LM7001

(X05-378X-XxX)

PARTS

1S

Vessco

Sia

seetoule

tacts

atheist

aan

cuban

deta

tea

44

PLL.

CONTROL

DATA

s.

eccccih

ted

ive

aie

neces

12

SPECIFICATIONS.

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Back

cover

ADJUSTMENT

wicicciised.besloaaseas

sda

teeecisades

Saakace

15

T-93/93L

CONTROLS

AND

INDICATORS

Tuner

Numeric

keys

(1

to

10/0,

Preset

channels,

program

Nos.)

BAND

key

(T-93:

FM1, FM2,

AM/

CHECK

key

T-93L:

FM1,

FM2,

MW,

LW)

CLEAR

key

TUNING/CHARACTER

UP/DOWN

keys

ENTER

key

(OOD)

Fam

sTerReo

SYNTHESIZER

TUNER

T-93

a

DOWN

TUNING/CHARACTER

UP

TSUN

Z/MON

it

SWED

FRU

procram

=

{i}

Oo

a

AUTO

STEREO

TUNED.

—|

——

—

oT

FM

MW

LW

AY

Wi.

Ma NA

Pb

te

Ce

we

PT

wt

IAI

aN

la

!

Pie

CF

OF

kee

fF

Eten

(SON)

(ON)

TUE)

eo)

Feo}

[exxa]

SLEEP

gE

G/FRI

JISAT

a

9

10/0

CoICICICICI

EVERY

WEEK

1

_

WEEK

2

ADJUST

SLEEP

EXE.

PROG.

_OISPLAY

DIRECT

P.SCAN

AUTO

DIGIT

CHARACTER

oa

ee

ed

ee

DISPLAY

key

DIRECT

key

PROG.

key

P.SCAN

key

EXE.

key

AUTO

key

(Auto

tuning/manual

tuning)

SLEEP

key

DIGIT

key

ADJUST

key

CHARACTER

key

Display

panel

BAND

indicators

(T-93:

FM,

AM/T-93L:

FM,

MW,

LW)

AUTO

indicator

STEREO

indicator

PROGRAM

indicators

(

[1]

to

[6])

TUNED

indicator

Year/Station

name

display

AUTO

STEREO

TUNED

~

CI Cl

ma

1

te

LI

Lt

kez

§

Ltr

SLEEP

MEMORY

Preset

channel

Day-of-the-week

indicators

display

MEMORY

Month/Day/Present

time/Frequency

display

pina

indicator

SLEEP

timer

indicator

T-93/93L

ANTENNA

CONNECTION

Antenna

connections

FM

outdoor

antenna

T-93

AM

loop

antenna

ANTENNA

LOOP

ANTENNA

BAM

(MW,

LW)

loop

antenna

Install

the

AM

(MW,

LW)

loop

antenna

on

the

supplied

loop

antenna

stand

and

place

it

on

a

shelf,

etc.,

or

install

it

on

the

rack

or

wall

with

screws.

Rotate

the

AM

(MW,

LW}

loop

antenna

to

the

right

or

left

for

best

reception.

Ge

Keep

the

speaker

leads

and

AC

cords

away

from

the

AM

loop

antenna.

Note:

:

ae

Do

not

place

the

AM

(MW,

LW)

loop

antenna

on

the

unit.

As

this

unit

employs

a

computing

device,

placing

the

AM

(MW,

LW)

loop

antenna

on

the

unit

may

result

in

noise

generation.

Place

the

AM

(MW,

LW)

loop

antenna

away

from

the

unit.

@

AM

(MW,

LW)

outdoor

antenna

In

steel

buildings

or

at

a

great

distance

from

the

transmitter,

it

may

be

necessary

to

install

an

outside

longwire

antenna.

The

end

of

this

wire

should

be

stripped

of

insulation

and

con-

nected

to

the

AM

terminal.

At

this

time,

keep

the

loop

anten-

na

connected.

AM

(MW/LW)

outdoor

antenna

\--O§

FM

indoor

antenna

|

ea

T-93L

Antenna

adaptor

HFM

outdoor

antenna

It

is

recommended

to

install

an

exclusive

FM

outdoor

antenna

to

capture

FM

broadcasts

with

high

sound

quality.

Use

a

coaxial

cable

for

the

connection

between

the

outdoor

antenna

and

FM

ANTENNA

terminal

on

the

rear

panel.

For

the

connection

between

the

coaxial

cable

and

FM

ANTENNA

ter-

minal,

please

refer

to

the

illustration

above.

@

FM

indoor

antenna

In

areas

where

FM

waves

are

strong,

FM

broadcasts

can

be

received

by

connecting

the

supplied

T-shaped

antenna

as

shown

in

the

illustration

above.

However,

as

FM

waves

are

susceptible

to

external

radio

interference

causing

distortion,

it

is

recommended

to

use

an

exclusive

FM

outdoor

antenna.

®

To

minimize

auto-ignition

noise,

locate

the

antenna

i

as

far

from

heavy

traffic

as

possible.

|

@

Keep

the

feeder

or

coaxial

cable

as

short

as

possible.

Do

not

bundle

or

roll

up

excess

cable.

@

The

antenna

should

be

at

least

two

meters

(6.6

feet)

from

reinforced

concrete

walls,

or

metal

structures.

FM

outdoor

antenna

setting

T-93/93L

BLOCK

DIAGRAM

ve

|

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T-93/93L

FUNCTION

OF

EACH

IC's

TUNER

UNIT

(X05-378X-XX)

Components

Use/Function

Operation/Condition/Compatibility

LM7001

PLL

IC

Electronic

tuning

PLL

LA1265

FM/AM

system

IC

FM

IF

amplification,

detection,

and

AM

MIX,

IF

amplification,

detection,

control

AN7470

FM

MPX

IC

MPX

demodulation

Q1

28C1923

FM

IF

amplifier

10.7

MHz

amplification

Q2

2SC1740S

E:P.E.

PLL

low-pass

filter

JC501/2SC945(A)

Q3

2801845

L.P.F.

PLL

low-pass

filter

Q4

(T-93L)

2SK163

L.P.F.

switch

Time

constant

selection

for

LW

mode

2SK364

Q6

(T-93L)

2SC1740S

L.P.F.

control

I

Control!

over

04.

LW

position

with

switch

ON

JC501/2SC945(A)

Q7

(T-93L)

28C1740S

Q8

(T-93L)

2SC1740S

Antenna

coil

selection

LW/MW

electronic

selectionz

JC501/2SC945(A)

Q11

(T-93L)

28C1740S

Buffer

Impedance

change

JC501/2SC945(A)

Q13

[|

2SA733(A)

Q24

2SA733(A)

Q25

2SA733(A)

Tuner

band

selection

FM/MW/LW

power

selection

JA101/2SA933S

Q15

2SA733(A)

Mute

control

Q16

2S8C2003

Q17

2$D1302

2801302

Constant

voltage

Mute

switch

Mute

ON

with

signal

‘’L’’

from

microprocessor

2SA933S

+5.6

V

regulated

ON

in

function

selection

Q19

{T-93)

28C1740S

Q20

(T-93)

28C1740S

Q21

2SD1266

Q22

2SA733(A)

023

28C1740S

Deemphasis

selection

Constant

voltage

Power

switch

Control

DISPLAY

UNIT

(X14-262X-XX)

JAPAN

MADE

(X14-263X-XX)

SINGAPORE

MADE

Components

Use/Function

Deemphasis

time

constant

selection

for

FM

mode

2SC945(A)

+13

V

regulated

Power

ON/OFF

operation

2SA933S/JA101

Power

ON

with

signal

‘‘H’’

from

microprocessor

JC501/2SC945(A)

Operation/Condition/Compatibility

CXP50112-0100

4-bit

microprocessor

Controller

for

PLL

and

display,

etc.

2SC1740S

FIP

Driver

FIP

Indication

(STEREO,

TUNED,

ch

etc.)

JC501/2SC945(A)

28C1740S

FIP

Driver

FIP

Indication

(FM,

AM,

etc.)

JC501/2SC945(A)

2SA733(A)

Tr.

SW

CHANNEL

SPACE

select

2SA933S

2SA733(A)

Constant

voltage

For

+5

V

JA101/2SA933S

2SC1740S

Microprocessor

Reset

Suplies

reset

pulse

to

microprocessor

JC501/2SC945{(A)

T-93/93L

CIRCUIT

DESCRIPTION

OPERATION

SPECIFICATION

Functions

(1)

Tuner

section

a)

b

=

—

c

d

=>

~~

e

f)

Auto

tuning

When

the

“AUTO”

display

is

lighting,

the

tuning

operation

starts

with

the

UP

or

DOWN

key

pressed.

This

operation

continues

in

the

direction

of

increasing

or

decreasing

fre-

quency

at

arate

of

approx.

125

msec/step

until

the

SD

ter-

minal

becomes

‘‘L"’

(in

which

‘‘

TUNED”

lights).

When

an

input

is

obtained,

the

operation

is

stopped,

after

which,

0.5

sec

later,

muting

is

turned

OFF.

Manual

tuning

When

the

AUTO”

display

is

off,

when

the

UP

or

DOWN

key

is

pressed,

the

tuning

operation

goes

in

the

direction

of

increasing

or

decreasing

frequency

at

a

rate

of

one

step

per

key

pressure.

When

the

UP

or

DOWN

key

is

pressed

continuously

for

more

than

0.5

sec,

the

tuning

operation

continues

in

the

direc-

tion

of

increasing

or

decreasing

direction

at

a

rate

of

125

msec/step

irrespective

of

the

SD

terminal

level

until

the

key

is

released

from

the

finger

pressure.

Direct

tuning

The

frequency

whose

data

has

been

directly

input

from

numeral

keys

is

received.

About

how

to

input

the

frequen-

cy

data,

press

the

DIRECT

key,

then

input

the

frequency

value

from

numeral

keys.

When

the

input

frequency

is

within

the

specified

band,

this

frequency

is

received

soon

after

the

input

of

its

final

digit,

While

when

it

is

without

the

specified

band,

an

error

dis-

play

appears

for

5

seconds,

after

that

the

original

display

is

restored,

Preset

memory

For

each

band,

10

stations

can

be

preset.

Their

station

names,

each

consisting

of

up

to

4

characters,

can

all

be

memorized

at

the

same

time.

Only

the

FM

mode

permits

memory

of

10

more

stations.

In

this

case,

however,

their

station

names

cannot

be

input.

Preset

scan

This

function

is

to

receive

the

preset

stations

successively.

With

a

tuning

signal,

muting

is

turned

OFF

for

5

seconds,

while

with

no

tuning

signal,

the

tuning

operation

shifts

to

the

after

1

second.

Station

name

display

For

a

preset

memory,

up

to

4

characters

can

be

input

for

a

station

name.

When

the

wanted

one

is

called

from

the

preset

memory,

that

station

name

is

displayed.

Inputtable

characters

are

alphanumerics

A

to

Z

and

0

to

9,

and

6

spe-

cial

characters

including

‘’—‘’

(blank).

In

addition,

FM2

does

not

permit

input.

(2)

Timer

section

a)

Day

timer

A

timer

function

with

the

unit

count

of

7.8125

msec

is

provided.

The

time

value

is

displayed

in

the

24-hour

mode

without

flickering

of

the

colon

‘’:’’

after

which

the

second

data

is

displayed.

At

first,

when

AC

is

applied,

the

display

is

initialized

to

“0:00”.

When

the

power

fails,

all

digits

inclusive

of

the

colon

flick-

er

to

warn

for

readjustment.

b)

Calendar

An

auto

calendar

function

of

from

January

1,

1900

to

De-

cember

31,

2099

is

provided.

With

year,

month

and

day

data

is

input,

day-of-week

setting

is

automatically

made.

When

initialized,

January

1

(Sunday)/1989

is

engaged.

c)

Calendar

check

When

year,

month

and

day

data

is

input,

it

is

possible

to

know

what

day

of

the

week

that

day

is.

The

inputtable

range

of

data

is

the

same

as

that

for

the

calendar

function.

d)

Programmable

timer

Six

timer

systems

are

provided

to

set

the

day

of

week,

ON

time,

OFF

time,

band

and

preset

channel,

independently.

As

to

the

day

of

week,

selection

is

possible

from

10

pat-

terns

such

as

each

day

of

week

of

Sunday

to

Saturday,

ev-

ery

day,

Monday

to

Saturday,

and

Monday

to

Friday.

e)

Sleep

timer

The

sleep

timer

is

an

auto

OFF

timer

of

max.

90

minutes,

which

is

capable

of

setting

in

units

of

10

minutes.

During

the

sleep

timer

operation,

the

‘‘SLEEP”’

display

is

lighting.

This

timer

is

given

priority

over

the

programmable

timer.

The

sleep

timer

is

operable

even

when

the

day

timer

is

not

set.

T-93/93L

IC1:

CXP50112-0100

(X14-)

4-bit

MICROPROCESSOR

Connections

(Top

View)

KS4

SURROUND

SUPER

WOFF

CENTER

SP

p

fe)

1G

2G

3G

4G

$4/PGO

S5/PG1

$6/PG2

$7/PG3

S8/PKO

S$9/PK1

S10/PK2

S11/PK3

$12/PJO

$13/PJ1

$14/PJ2

$15/PJ3

$16/T15

$17/T14

$18/T13

$19/T12

$20/T11

S$21/T10

$22/T9

S$23/T8

17

T6

T5

T4

CIRCUIT

DESCRIPTION

QVO@OOD-OOOOOOOOMOOOOOMOO)

S3/PH3

KS3

OOBYO

el

OG

S2/PH2

KS2

S1/PH1

59

KS1

bal

OL

SO/PHO

KSO

08

CNS

(N3d0)

ON

XL

XSL

GND

LaSay

aay

ag

O0V/Old

SLAWL

9SWAD

Id

KR6 KR5

PC2

LOV/LId

cav/eld

101d

KR4

KR3 KR2

PCO

@)

8)

€qv/eld

NIVN

vaQVv/08d

Ls

qd

PD2

ans

sdav/lad

Note:

The

NC

pins

PD1

PDO

PY3/RMC

PY2/WP

PY1/PWM

PYO

PE3

PE2

PE1

PEO

PF3

PF2

PFI

PFO

PA3

PA2

PAI

PAO

PX2/SI

PX1/SO

PXx0/SC

EC

PB3/AD7

PB2/AD6

KRI1

KRO

RREEMOCON

CE

FVLED

RVLED

FVUP

FVDW

RVUP

RVDW

GE

FPOWER/EXRS

A

MUTE

SDT/KS5

SCK

SST

DATA

BUSY

BILINGUAL

STEREO

SD

GND

E-XST

MONO

pins

33

and

73,

shod

be

set

to

VDD.

T-93/93L

CIRCUIT

DESCRIPTION

Functions:

Name

Operation

description

6

name

S4/PGO

S5/PG1

$6/PG2

$7/PG3

$8/PKO

S9/PK1

$10/PK2

$11/PK3

$12/PJO

$13/PJ1

$14/PJ2

$15/PJ3

S16/T15

$17/T14

$18/T13

$19/T12

$20/T11

$21/T16

$22/T9

$23/T8

KS4

Key

scan

output

SURROUND

ON/OFF

SUPER

WOFFER

|

SUPER

WOFFER

ON/OFF

CENTER

OUTPUT

ON/OFF

S8

FL

segment

output

S9

FL

segment

output

FL

segment

output

FL

segment

output

O!OI

NIA!

ASA!

WihM

FL

segment

output

FL

segment

output

FL

segment

output

FL

segment

output

FL

segment

output

FL

segment

output

FL

segment

output

FL

segment

output

FL

segment

output

FL

segment

output

FL

segment

output

FL

segment

output

T7

FL

grid

output

T6

FL

grid

output

TS

FL

grid

output

T4

FL

grid

output

T3

FL

grid

output

T2

FL

grid

output

det

FL

grid

output

OLOSOLOSLOLOlOLlOlLOSlOlOlLOlLOlLO;LOLOJSOJSOlLOLOS/O!LIOsS/IOlL|OjJO;O};oO/];o

TO

FL

grid

output

External

interrupt

pin...

unused

;

TX

Timer

oscillation

pin...

unused

TEX

Timer

oscillation

pin...

unused

RESET

Reset

input

i

Noe

NC

Power

supply

TMUTE

Tuner

section

mute

output

:

vie

a

PLCK/KS6

Clock

to

PLL

and

extension

IC,

and

key

scan

(for

diode

SW)

PLDT

Data

output

to

PLL

and

extension

IC

PLST

PLL

chip

enable

output

PMAIN

TV

sound

multiplex

selection

output

PIO/ADO

PIT/AD1

PI2/AD2

PI3/AD3

PBO/AD4

PB1/ADS

PB2/AD6

PB3/AD7

PSUB

TV

sound

multiplex

selection

output

PMONO

Stereo/mono

selection

pier

O}OJ;/O}/O};O}]O};O]/O

EXIO

Extension

IC

strobe

signal

EC

Even

counter

input...

unused

Be

a

es

ty

HN

eB

tee

PXO/SC

|

SD

Tuning

signal

input

ed

:

Mono

PX1/SO

ST

Stereo

signal

input

°

Stereo

a

T-93/93L

CIRCUIT

DESCRIPTION

name

Name

Operation

description

H:

Normal

++

——

PX2/S|

BIL

Bilingual

signal

input

L:

Bilingual

PAO

BUSY

System

control

busy

PA1

DATA

System

control

data

PA2

PA3

PFO

PF1

PF2

PF3

PEO

PE1

PE2

PE3

ISST

Input

selector

IC

strobe

output

ISCK

Input

selector

IC

clock

output

ISDT/KS5

Input

selector

IC

data/key

scan

AMUTE

Amplifier

section

mute

output

a

prec

POWER/EXRS

Power

control/extension

IC

reset

output

ie

oft

Nees

ON}

. “ .

H:

Graphic

equalizer

ON

GE

Graphic

equalizer

display

output

L:

Graphic

equalizer

OFF

RVDW

Rear

volume

down

He

Down

RVUP

Rear

volume

up

i

Up

FVDW

Master

volume

down

i

Bow

H:

Up

L:—

al

FVUP

Master

volume

up

L.

>

OFF

PYO

RVLED

Rear

volume

LED

ON

PY1/PWM

FVLED

Master

volume

LED

uote

mae

Ua

:

ON

PY2/WP

CE

AC

ON/OFF

detection

input

OFF

OJOJOLOLO;L/O;SOLOLO/]O/S]OlO

PY3/RMC

;

RMCN

Remote

control

input

:

With

input

;

Without

input

:

With

input

:

Without

input

:

With

input

Without

input

With

input

Without

input

+

With

input

Without

input

With

input

:

Without

input

:

With

input

:

Without

input

:

With

input

:

Without

input

PDO

KRO

Key

return

input

KR1

Key

return

input

KR2

Key

return

input

KR3

Key

return

input

KR4

Key

return

input

KR5

Key

return

input

KR6

Key

return

input

THCLIHLTOHLTiCTi-“LTiCLTic_co

Key

return

input

GND

Oscillator

NC

EXTAL

Oscillator

VREF

Voltage

detection

reset

pin...

unused

VFDP

FL

pull-down

resistor

power

SO/PHO

Key

scan

output

S1/PH1

Key

scan

output

S2/PH2

Key

scan

output

ee

S3/PH3

Key

scan

output

Kenwood T-93 User manual

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