LENCO LA1200 Manuale utente

Lenco

AF

3302

Service

Manual

MODELS

LA1200

STEREO

POWER

AMPLIFIER

LA1200

STEREO

POWER

AMPUFIER

Amplifier

Section

Continuous

average

power

output

(ooth

channel

driven)

:

into

8

Ohms

(from

20HzZ

to

20KHZ)..................

125W

into

8

Ohms

(from

1KHZ)

......

0...

cee

ee

eee

es

150W

into

4

Ohms

(from

1KHZ)

.........

0...

cece

cee eee ees

200W

Total

Harmonic

Distortion

into

8

Ohms

(from

20HZ

to

20KHZ)..............

evan

01%

into

8

Ohms

(from

1kHZ).........

0.0...

ccc cee

eee

0.03%

into

4

Ohms

(from

1kKH2)..........

0.0.0

ccc

cee

eee

0.05%

FRONT

PANEL

FEATURES

oo0a

O.

did

HY

NASA

ITZ

ILM.

Distortion.

......

0.0...

0.

cece

eee

ide

wean

0.03%

Signal

to

Noise

Ratio

(IHF

“A”

Network)

...........

120dB

Input

(Sensitivity/Impedance)

..................0.

1V/47kQ

Frequency

Response

.

202

10

TDOK

AZ

aas

daned

cin

cee

eee

ene

ee

eete

es

=

OOo

DaMpINO

FaCtOl

cic

45

ecu

sb

eeee

em

sah een

ena ids

1.

45

Power

“ON”

Muting

Time............

0.

cece

eee

o—7

sec

Miscellaneous

| |

|

.

Power

requirements

...........

saat

Me

cuban

AC220V,

50

Hz

Power

Consumption..............0c0ccee

435

W,

530VA

DIMENSION

2.5.3.5

toeeeeews

420(W)

x

132(H)

x

350(A)mm

001003

Wd

YH

DANS

HL

a

2

8

4

8

1.

POWER

SWITCH

Depress

switch

to

ON

position

to

supply

power

to

the

am-

plifier.

2.

OUTPUT

LEVEL

METER

The

output

power

level

meters

give

a

visual

indication

of

audio

power

being

delivered

to

each

speaker.

'3

6PROTECTION

CIRCUIT

OPERATION

INDIC-

ATOR

LAMP

A

red

LED

indicates

when

the

protection

circuit

is

ac-

tivated

and

a

green

LED

indicates

when

the

protection

Circuit

is

off.

The

protection

circuit

activates

fora5—7

second

period

when

the

unit

is

powered

on

and

whenever

the

unit

overheats

beyond

a

specific

temperature.

4.

SPEAKER

“A”

SELECTOR

SWITCH

Depress

button

to

listen

to

the

speaker

Systems

con-

nected

to

the

speaker

A

terminals.

(ON)

—

Depressed

position;

Sound

is

heard

from

speaker

systems.

(OFF)

—

Released

position;

NO

sound

is

heard

from

speaker

systems.

5.

SPEAKER

“B”

SELECTOR

SWITCH

Depress

button

to

listen

to

the

speaker

systems

con-

nected

to

the

speaker

B

terminals.

(ON)

—

Depressed

position;

Sound

is

heard

from

speaker

systems.

(OFF)

—

Released

position;

NO

sound

is

heard

from

speaker

systems.

Note

:When

both

buttons

are

depressed

both

speaker

pairs

A

and

B

are

selected.

BLOCK

DIAGRAM

INPUT

LEFT

INPUT

RIGHT

LCH

POWER

AMP

|

CED

GEE

OD

EEE

ED

FROM

LEFT

POWER

LEVEL

METER

POWER

SUPPLY

—

;

g

ee ee

ee

Te

ER

ge

ee

ey

ge

ea

ae

eye

na

Fe

OE

ae

ete

er

ay

pe

Rage

a

WE

LE

gh

ee

eae

Ln

ea

Gene

Ghee

Tae

Mem

y

eT

Oa

Te

eg

eee

tees

oe

POWER

LEVEL

METER

i

NOTES:

¢

Parts

without

part

number

cannot

be

supplied.

°

The

/\

mark

found

on

some

component

parts

in-

|

dicates

the

importance

of

the

safety

factor

of

the

part.

.

:

|

Therefore,

when

replacing,

be

sure

to

parts

of

identical

designation.

.

|

e

For

your

Parts

Stock

Control,

the

fast

moving

items

are

indicated

with

the

marks

**and**

**

GENERALLY

MOVES

FASTER

THAN**

This

classification

shall

be

adjusted

by

each

distributor

because

it

depends

on

model

number,

temperature,

humidity,

etc.”

Mark

No.

Part

No.

Description

Mark

No.

Part

No.

Description

1

NNB-123-0

Front

Panel

27

VBZ30PO80FMC

Screw

2

NNA-284-C

Panel

Stay

28

BBZ30PO80FMC

=

Screw

3.

NND-038-A

Bottom

Plate

29

VBZ30PO080FMC

Screw

4

NNA-283-A

Side

Frame

30

BBZ30PO080FMC

Screw

5

NNA-343-0

Rear

chassis

31

VMZ30PO80FMC

Screw

6

NNE-O051-A

Bonnet

Case

32

BBZ30PO80FMC

Screw

7

NNW-766-A

Reflector

33

BBZ30PO60FMC

Screw

J\

8

NTT-147-0

Transformer

34.

\VBZ30P100FMC

Screw

9

NKE-004-0

Push

Terminal

35

VBZ40PO80FMC

Screw

10

NNW-775-0

‘Function

Knob

‘B’

36

BBZ30PO80FZK

Screw

11.

NNWN-825-A

Window

38

BBZ30P080FZK

Screw

12

NNW-959-A

Sub

Escutcheon

39

VBZ30PO80FZK

Screw

13.

NNM-045-0

LED

Sheet

40

FBT40PO80FZK

Screw

14.

NNW-711-0

Power

Knob

41

BBZ30PO80FZK

Screw

15

NNM-062-0

Sub

Plate

42

BBZ30P080FZK

Screw

_

16

NEL-003-B

Pilot

Lamp

Ass’y

43

NBM-007-0

Plastic

Rivet

Zi\

17

NSA-005-0

Push

SIW

44

BBZ30PO80FMC.

Screw

(ESB997V8)

45

BBZ30PO080FMC

Screw

*18

NEK-102-0

Fuse

(2A)

46

VMZ30PO80FMC

Screw

Z\

19

NNP-064-0

AC

Outlet

47

NNM-062-0

Sub

Plite

(S-16521#01)

48

NWH-017-0

Main

PC.P

Ass’y

20

NWT-024-0

2P

Phone

Jack

49

NNW-906-0

Joint

21

NKR-008-0

Fuse

Holder

50

BBZ30PO80FMC

Screw

*22

NEK-105-0

Fuse

(8A)

51

3

NNF-151-0

Heat

Sink

Support

23

406000009000

Strain

Relief

Bushing

52

NNH-065-0

Heat

Sink

Zi,

24

NDG0230

Power

Cord

2

NAW-023-A

Meter

26

NNV-006-0

Foot

eee

F

oa

a

‘

ee)

f

eae

Z

Fs

er

ae

a3

PRES

ee

Ee

are

.

7

sic

i

st

a

ch

ek

CT

ey

eT

Ee

SET

Te

ee

ye

eee

ee

eee

Se

SEE

ON

Ne

eee

DEE

AEE

a

Re

OE

ET

A

LT

Mele

a

ee

ae

Fi

a

ee

Ee

ae

al

a

alge

ee

EE

Ee

NL

ee

EE

TRS

ROT

E

T

EE

SRR,

PERCE

ey

NOP

TN:

REE

PS

OR

ae

Fig

1.

ae

4.

POWER

METER

ADJUSTMENT

WITH

POWER

“OFF”

Remove

front

panel

and

adjust

the

meter

needle

to

“Q”

on

the

scale

(Fig.

1)

‘

.

POWER

METER

ADJUSTMENT

WITH

POWER

“ON”

Tum

power

on,

feed

a

1kHz,

1V

RMS

signal

from

a

signal

generator

to

the

L

channel

input

jack

of

the

PA-1200B

With

the

speaker

or

8

ohm

dummy

look

removed,

adjust

VRI102

till

the

meter

needle

points

to

“low”

on

the

scale.

SS

3.

Set

R

channel

meter

by

adjusting

VR101

in

the

same

manner

and

signal

fed

into

the

R

channel

in

put

jack.

NOTES:

When

ordering

resistors,

first

convert

resistance

values

into

code

form

as

shown

in

the

following

examples.

Ex.

1.

When

there

are

2

effective

digits

(any

digit

apart

from

0),

such

as

560

ohm

and

47k

ohm

(tolerance

is

shown

by

J=5%,

and

K=

10%).

560

9=56x10'

—

561............

RDV4PS

561J

47K

N=

47

x

10°--

473...

2.2.00...

RDVPS

473J

0.50

—

ORS.........

cece

eee

RN2H

ORS5K

AO

O10

enetet

cous

oea

sas

haanwens

RS1P

010K

Ex.

2.

When

there

are

3

effective

digits

(such

as

in

high

precision

metal

film

resistors).

5.62k0

562

x

10'

5621.............

RN

%SR5621F

The

/A\

mark

found

on

some

component

parts

indi-

ates

the

importance

of

the

safety

factor

of

the

part

‘therefore,

when

replacing,

be

sure

to

use

parts

of

iden-

tical

designation.

For

your

Parts

Stock

Control,

the

fast

moving

items

are

indicated

with

the

marks

*

*and**

**GENERALLY

MOVES

FASTER

THAN**

This

classification

shall

be

adjusted

by

each

distributor

because

it

depends

on

model

number,

temperature,

humidity,

etc.

Miscellaneous

Parts

List

P.C.

BOARD

ASSEMBLIES

Mark

Symbol

&

Description

Part

No.

PCB

B’D

NNP-294-A

Main

PCB

Ass’y

NWM-106-0

LED

PCB

Ass’y

NWS-057-0

Jack

PCB

Ass’y

NWS-058-0

OTHERS

Mark

Symbol

&

Description

Part

No.

Th.

Ceramic

Capacitor

(0.01

400V)

NCG-002-0

AX

Power

transformer

NTT-147-0

AC

Socket

(8P)

(AC

Outlets)

NKP-064-0

Z\

Fuse

NEK-102.0

/\,

Fuse

NEK-105-0

**

AC

Power

Cord

NDG-023-0

/\

Switch

(Power

NSA-005-0

SEMICONDUCTORS

Mark

Symbol

&

Description

Part

No.

**

10101

LR

STK4048XI1

**

—

1€102

TA7317P

**

10103

TA7318P

*

—

Q101LR

KTC2240Y

or

GR

*

—

Q102

KTA970Y

or

GR

*

—

Q103,

Q104

KTC1815Y

or

GR

Mark

Symbol

&

Description

*

D106

*

D101

U/R,D102,-D107,

D108

*

D109

UR

*

D103

RELAY

MARK

Symbol

&

Description

RLY101

COILS

Mark

Symbol

&

Description

L101

LR

(AF

COIL)

SWITCH

Mark

Symbol

&

Description

SW103,

SW104

(Push

Switch)

OTHERS

Mark

Symbol

&

Description

2P

Jack

Part

No.

BR252

IN4002

1S2473

IN9S65A

or

DZ15E

Part

No.

NSR-016-0

Part

No.

ATH-054-0

Part

No.

NSA-004-0

Part

No.

NKB-002-2

Rasta

ti

st

otatte

aa

;

‘

a

4

e

#

A

5

‘

t

3

|

4

RESISTORS

Mark

Symbol

&

Description

R109

L/R,

R110,

WR,

R111

LR,

R112

UR

R139,

R140

R116L/R

R118U/R

R101,

LR,

R103

L/R,

R123

R104L/R

R125,

R132,

R146,

R149

R120

R117U/R

R107

L/R,

R147,

R148,

R151,

R153

R119

R124,

R127,

R105

L/R

R129

R115

L/R,

R121,

R135,

R136,

R145

R152,

R102

L/R

R130

R122,

R131

R126

R128

R143,

R144,

R150

CAPACITORS

Mark

Symbol

&

Description

C122

C110

WR,

C111

UR,

C115L

C116L,

C137

L/R

C102

UR,

C136

C123,

C124,

C125,

C126,

C138,

C139

C118

Part

No.

NCN-010-0

RDV%4

PM150J

RD%

PM331J

RD%4PM821J

RD%4PM102J

RD%PM561J

RD%PM222J

RD%4PM512J

‘RD

%

PM562J

RD%4PM103J

RD%

PM123J

RD%4

PM203J

RD%

PM333J

RD%4PM473J

RD

1%

PM563J

RD

PM104J

RD

4

PM224J

RD%4PM332J

RD%4PM101J

CEAR47M50L

CEA010MS0L

CEA4R7M50L

CEA100M50L

CEA220M25L

Mark

Symbol

&

Description

C120

C119

C104

UR

C108

UR,

C109

LR,

C106R,

C107R

C106L,

C107L

C105

UR

C103

WR,

C112

LR,

C114

UR

C101U/R

C113

UR

C127,

C128

C121

C117

UR

RESISTORS

Mark

Symbol

&

Description

VR101,

VR102

R113

UR,

R114

UR

Z\

R106,

UR,

R108

LR

Z\,

R133,

R134

/\,

R137,

R138,

R141,

R142

CAPACITORS

Mark

Symbol

&

Description

C130,

C131,

C132,

C133

C134,

C135

(10,000/80WV)

Part

No.

CEA330M25L

CEA470M25L

CEA101M25L.

CEA221M50L

CEA221M35L

CCDSL100J50

CCDSL101J50

CCDSL471J50

CKDYB102J50

CQMA102J50

CQMA103J50

CQMA473J50

Part

No.

NCP-034-0

RSIL100J

RSIL101J

RSIL3832J

RSIL682J

Part

No.

NCG-001-1

NCH-010-0

‘

{

'

8

g

i

4

&

|

.

;

i

{

:

4

:

}

i

§

Mark

No.

Part

No.

Description

NRB-023-0

Operating

Instruction

NEC-009-0

Poly

Sheet

Power

Amp

Set

NHA-256-0

Side

Pad

(R.

L)

NHG-273-0

Packing

Case

1

2

3

4

5

SCHEMATIC

DIAGRAM

PCB

NNP-294-A

MAIN

B'd

NWM

—

106-0

_

|

RICBL

100(Iw)

,

|

IC

101L

4048

X

|

STK

4048XI

PL:

PR

=

PTH487

AO!

B0222TS

ne

GCBK(IMX2

|

POSISTOR

(

MURATA)

a

Z

¢c128

|

+

10/50

|

POWER

LEVEL

METER

LEFT

RIGHT

@ @

Poa

/

ro

/NX

|

oe

|0

|

lise

ne4

180

so

rn

mn

ae

eee

R42

8.

Si

\WIX2

LEFT

ieee

CO

Oe:

es

SPEAKER

A

a

SPEAKER

Sw

swios

re}

ae

Cae

—

es

—)

|

O

RIGHT

©)

O

LEFT

KLG

20BE

A

SPEAKER

8B

220/80

X

2

Dios

.

f

Be

SPEAKER

Sw

G

CIOBR

§=CIOOR

«nee

tootw)

_

.

iN

400R

pia

~

ee

Bioik

QIOIR

+

Y/GR

|

7

PCe8

BD

'

@wS-O5?-0

cicer

O

RWOIR

K

47/50

ee

Brose

RIOR

470P

a2r/(sw

\

|

R153

paar

CI7R

10K

0.47

(mM)

mR

O.27(SW)

;

R1I4ER

[\

a

10

(re)

AC

INPUT

RHU2R

O27

(Sw)

220V

/

SOHz

|

t

|

RIO6GR

CIOGR

ciosR

OP

cio7e

|*

220750

X2

:

]

t

RIOSR

|

CiO4R

100/28

20K

1

RIOSR

3

|

$60

:

[on

GeeeeeE

©

GEEewe=e==

0:

GES

@

CeeeED

@

CEES

eTe

6»

CEE

&

EES

GS

GETS

GP

GUESS

CD

SS

OO

CS

GS

em

Cues

GS

Gare

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GEESE

as

Gece

GD

EXPLODED

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LENCO LA1200 Manuale utente

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