Pioneer Keh-p7400 User manual

@)

PIONEER’

The

Art

of

Entertainment

Service

anual

MULTI-CD

CONTROL

HIGH

POWER

CASSETTE

PLAYER

WITH

ID-LOGIC

TUNER

KEH-

P7400

..

MULTI-CD

CONTROL

HIGH

POWER

CASSETTE

PLAYER

WITH

FM/AM

TUNER

KEH-P7450

--

*KEH-P7400/UC

a

ORDER

NO.

CRT

1845

g

_ID

LOGIC

IS

A

TRADEMARK

OF

AND

1S

MANUFACTURED

[|

UNDER

LICENSE

FROM

PRS

CORPORATION,

N.Y.

&

H.K.

|

L

wu)

Gl

Cc

@®ALL

RIGHTS

RESERVED.

NOTE:

@

See

the

separate

manual

CX-631(CRT1640}

for

the

cassette

mechanism

description.

@

The

cassette

mechanism

employed

in

this

model

is

one

of

X-2L

series.

@

Dolby

noise

reduction

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

"Dolby"

and

the

double-D

symbol

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

@

For

the

service

mentioned

in

this

manual,

the

special

tools

GGD1056

and

GGD1019

have

to

be

used.

See

the

sections

and

"Adjustment"

on

how

to

use

these

tools.

@

Service

Precautions

This

device

employs

an

inverter

as

the

power

supply

for

the

EL.

The

inverter

has

an

output

voltage

reach

approxi-

mately

300

Vrms

(AC),

under

no-load

condition

and

about

160

Vrms

{AC},

with

the

EL

connected.

Utmost

cars

should

be

used

not

to

suffer

from

a

possible

electric

shock,

accordingly.

CONTENTS

|

1.

SAFETY

INFORMATION

......sssccssssssesscrssorrstersreceseees

2

9.

CONNECTION

DIAGRAM

avsascusavinveu

ddcsariustetstance

deans

23

2.

DISASSEMBLY

............

sop

oink

chateadespaseueabearmioasssusésdbauige

2

10.

SCHEMATIC

CIRCUIT

DIAGRAM

........

sesecsesesrrrern

20

Se

FEST

MODE

tissccisecteletes

Sesonsse

icesceccdencausdescsseedaevsescemsavee

11.

CIRCUIT

DIAGRAM

AND

PATTERN

.........::scesreseeeer

20

4,

ADJUSTMENT

12.

EXPLODED

VIEW

AND

PARTS

LIST.

sasivsciesee

§.

tC

INFORMATION...

:

13.

PACKING

METHOD

©.

ae

saaeuseanneen

6.

ECD

acticnaciomaniueotenance

me

14.

SPECIFICATIONS....csssssssssssssscssssssesecssensetesssssssssestsene

46

7.

ELECTRICAL

PARTS

LIST

ou.

seececsesssrerenectesnstenenescanes

16

-

15.

OPERATIONS.

AND

CONNECTION

........--.:-scsssseeee

yi

8.

BLOCK

DIAGRAM

usc

seccssssssessecesscorsesenssasree

tienes

21

PIONEER

ELECTRONIC

CORPORATION

4-1,

Megura

1-Chome,

Meguro-ku,

Tokyo

153,

Japan

PIONEER

ELECTRONICS

SERVICE

INC.

P.0.Box

1760,

Long

Beach,

CA

90801-1760

U.S.A.

.

PIONEER

ELECTRONIC

[EUROPE]

N.V.

Haven

1087

Keetberglaan

1,

9120

Melsele,

Belgium

PIONEER

ELECTRONICS

ASIACENTRE

PTE.LTD,

501

Orchard

Road,

#10-00,

Lane

Crawford

Place,

Singapore

0923

ei

O

9

7

©

PIONEER

ELECTRONIC

CORPORATION

1996

.

K-FFL.

APR.

1996

Printed

in

Japan

KEH-P7400,P7450

1.

SAFETY

INFORMATION(UC

model)

CAUTION

This

service

manual

is

intended

for

qualified

service

technicians;

it

is

not

meant

for

the

casual

do-it-yourselfer.

Qualified

technicians

have

the

necessary

test

equipment

and

tools,

and

have been

trained

to

properly

and

safely

repair

complex

products

such

as

those

covered

by

this

manual.

,

improperly

performed

repairs

can

adversely

affect

the

safety

and

reliability

of

the

product

and

may

void

the

warranty.

if

you

are

not

qualified

to

perform

the

repair

of

this

product

properly

and

safely;

you

should

not

risk

trying

to

do

so

and

refer

the

repair

to

a

qualified

service

technician.

WARNING

Lead

in

solder

used

in

this

product

is

listed

by

the

California

Health

and

Welfare

agency

as

a

known

reproductive

toxi-

cant

which

may

cause

birth

defects

or

other

reproductive

harm

{California

Health

&

Safety

Code,

Section

25249.5}.

When

servicing

or

handling

circuit

boards

and

other

components

which

contain

lead

in

solder,

avoid

unprotected

skin

contact

with

the

solder.

Also,

when

soldering

do

not

inhale

any

smoke

or

fumes

produced.

, ,

2.

DISASSEMBLY

@

Removing

the

Case(not

shown)

-

1.

Remove

the

two

screws.

2.

Insert

and

titrn

a

flat

screwdriver

to

remove

the

case.

@

Removing

the

Cassette

Mechanism

Module

{not

shown}

©

1.

Remove

the

four

screws.

2.

Disconnect

the

connector.

3.

Remove

the

cassette

mechanism

module.

@

Removing

the

Panel

Assy

"

@

Removing

the

Tuner

Amp

Unit

4.

Remove

the

two

screws,

and

disconnect

the

two

con-

1.

Remove

the

two

screws

A

and

three

screws

B.

nectors.

,

2.

Remove

the

one

screw

C.

2.

Disengage

the

stoppers

at

four

locations indicated

by

3.

Unbend

the

tabs

at

two

locations

indicated

by

arrows

arrows.

until

straight.

3.

Remove

the

panel

assy.

"4,

Raise

up

on

tuner

amp

unit.

TUNER

AMP

UNIT

.

PANEL

ASSY

Fig.)

.

es

|

Fig.2

KEH-P7400,P7450

3.

TEST

MODE

3.1

TEST

MODE

Test

mode

is

mainly

used

adjustment

of

IP

BUS

type

CD

.

Canceling

test

mode

multi

players.(Such

as

CDX-P610}

Switch

the

back

up

and

ACC

off.

-

Switching

to

test

mode

"+

SINGLE/10TRK/32TRK

wilt

continue

to

operate

even

While

pressing

the

4,

6

keys

together,

switch

the

back

after

the

key

is

released.

Tracking

closed

the

moment

up

and

ACC

ON,

oY

C-MOVE

is

released.

*

JUMP

MODE

resets

to

SINGLE

as

soon

as

power

is

switched

off.

@

Flow

Chart

*—-_

ACC,Back-up

ON

<Regulator

OFF>

CD

PLAYER

SELECT

SOURCE

During

regulator

off,press

the

12

Not

sdlustment

for

key

anc

the

system

wil!

be

put

into

T.OFFS

the

new

test

mode.

<Regulator

ON>

ans.

<Regulator

ON>

0

app}

(2)

99

99'99""1

|

9g

ggagi(

2S)

Focus

mode

sales

=a)|

>

GD

Display,

BAND

Regulator

ON

Adjustment

for

T.OFFSET

<Close

oe)

Soon

Etna

«Close

tracking

>

Carriage

shifted

Carriage

shifted

outwards

while

inwards

while

visotay|

91

9092

|

this

key

is

pressed.

this

key

is

pressed.

<Close

tracking

>

'

<Clase

spindie>

Carriage

shifted

©

Carriage

shifted

Tracking

Display

Mette)

{Rough)

outwards

while

inwards

white

balance

example

0

{

Ge

Sh

this

key

is

pressed.

this

key

is

pressed.

adjustment

Carriage

move

Carriage

move

or

T,

jump

|

.

AGC

display*2

AGC

Tracking

open

select

. .

Single

—>

47RK

—-10TRK

C.MOVE

<—

100TRK

<

32TRK

Tracking

open

{in

the

case

of

continuous

jumping)

.

SELECT T.JUMP

MODE

‘Normal

focus

close

00(99}—->

$

curve

check

01>

Focus

EQ

check

02

5

*2

pNormal

display

>

Focus

gain

—>

Track

gain

73

*3

100

TRK

jump

&

carriage

move

—

Tracking

Close

in

a

iittle

while

the

keys

are

released.

*4

SINGLE/4/10/32

—>

continuous

even

after

key

releasé.

*5

rhcancel

—

T.offset

—>

T.bai

—»

Rough

Servo

7

KEH-P74200,P7450

3.2

ERROR

NUMBERS

AND

NEW

TEST

MODE

@

indicating

An

Error

Number

be

Th

if

the

CD

shoutd

fail

to

operate

in

CD

multi

ptayer

or

if

an

error

has

taken

place

during

the

operation

and

resulted

in

an

error,

the

player

will

enter

into

the

error

mode.

And

the

cause

of

such

error

is

numerically

indicated.

This

is

armed

at

assisting

an

analysis

or

repair.

.

(1}

Basic

Means

of

Display

; . ;

*

With

ERROR

indicated

in

“MODE”

on

IP-BUS

Display

data,

an

error

code

is

transmitted

by

the

use

of

MIN

and

SEC.

Identical

data

are

transmitted

with

MIN

and

SEC.

«

Examples

of

Display

ERROR-XX

(2}

Error

Codes

Error

-

|

Classification

Code

ELECTRIC

Carriage

home

failure

Carriage

doesn't

move

to

or

from

the

innermost

position

-—+Home

switch

failed

and/or

carriage

immobile

Focus

faifure

Focus

failed

—

Defects,

disc

upside-down,

severe

vibration

ELECTRIC

—

|

SETUP

failure

Spindle

faited

to

lock

or

subcode

unreadable

Subcode

failure

—

Spindle

defective,

defect,

severe

vibration

Unrecorded

CD-R

©

The

disc

is

upside-down,

defects,

vibration

AGC

protect

failed

—

Defects,

disc

upside-down,

severe

vibration

Search

time

out

Failed

to

reach

target

address

.

—Carriage/tracking

defective

and/or

defects

—

Switching

transistor

defective

and/or

power

abnormal

ELECTRIC

Mirror

failure

17

ELECTRIC

Set

up

failure

ELECTRIC

AQ

SYSTEM

An

error

upon

ejection

MAG

switch

release

time

has

time

out

Elevation

time

out

when

eject

An

error

while

puttingin

=

{

Tray

in/out

time

has

time

out

and

out

the

tra

Tray

is

caught

when

put

in

70

MECHANISM

|

An

error

upon

elevation

80

MECHANISM

|

An

error

with

an

empty

No

disc

is

available

cane

magazineinserted

*

Setup

means

a

series

of

operations

after

focusing

up

to

sound

output.

@

New

Test

Mode(aging

operation

and

setup

analysis}

The

single

CD

player

plays

in

normal

mode.

After

being

set

up,

it

will

display

FOK

(focus),

LOCK

(spindle},

subcode,

sound

skip,

protection

against

a

mechanical

error

or

the

like,

occurrence

of

an

error,

cause

and

time

of

an

expiry,

if

any,

{and

disc

number)

During

the

setup,

the

CD

software

operation

status

{internal

RAM

and

C-point}is

displayed.

See

the

test

mode

flow

chart

Page

3.

_

Description

Cause/Detail

KEH-P7400,P7450

(2)

Relations

of

keys

between

TEST

and

NEW

TEST

Modes

Reguiator

OFF

|

Requlator

ON

PLAY

in

progress

Error

Occurred,

Protection

Activated

BAND

Regulator

ON

|

Regulator

OFF

fe

2

es.

Time

of

occurrence

/

cause

of

error

select

FF

pL

FWD-Kick

|

TRACK

UP/FE

|

en

|

—

>

a

DOWN

/REV

7

|

i

trackingclose

|

scaN

|

ig

|

SCC

[Trackingopen,

[|

MODE

——C

|

CC

—CsSCSSCSCid

io]

CC

i

focusclose

of mp

|

COC

—SCSC—‘zS

Ie

ll

heron

Mode

_|

Select

Operations,

such

as

EJECT,

CD

ON/OFF,

etc.

are

performed

normally

{3)

Error

Cause

(Error

Number)

Code

[Error

Code

__|

Classification

_|

Mode

_|

Description

[Cause

|

etal!

SC

40s

ELECTRIC

FOK=L__100ms

Scratch,

41

s«ERLECTRIC

LOCK=L_100ms

_|Spindle

unlock

Stain,

uinacceptable

500ms

Servo

defect,

operated

(4}

Indicating

an

Operation

Status

During

Setup

Status

No.

‘or

Carriage

home mode

started

10-second

time

out,

home

switch

failed

10-second

time

out,

home

switch

failed

Carriage

moving

outwards

None

Setup

started

None

Spindle

turn/Focus

search

started

None

Failure

to

close

focus

Waiting

for

focus

closure

(FOK=H)

Failure

to

close

focus

Focus

closed,

Tracking

open

Focus

disrupted

During

focus

AGC

.

Focus

disrupted

Subcode

waiting

fig

During

tracking

AGC

ae

Waiting

for

MIRR,

LOCK

or

subcode

read

Focus

disrupted,

MIRR

NG,

failure

to

lock,

Carriage

closed,

SPINDLE=ADAPTIVE

__

failed

to

read

subcode

(5}

Example

of

Display.

«

SET

UP

in

progress

°

Protection/Error

upon

occurrence

pees

{a}

Error

number

indicated

ERROR-xx

=

|

*

Operation

(PLAY,

SEARCH,

etc.} in

progress

perfectly

Select

the

display

with

the

identical

with

that

in

the

normal

mods:

{hi

Tracknumber

:

BAND

key.

TRACK-10

os

KEH-P7400,P7450

4,

ADJUSTMENT

NOTE:

|

Select

C1

so

that

total

capacity

of

80pF

is

attained

from

°

Connection

Diagram

the

direction

of

the

receiver

jack.

Z:

Output

impedance

of

SSG.

BACK

UP

OC

Regulated

D_|

Power

Supply

mv¥

Meter

(1)

Oscilloscope

Dummy

Antenna

Plug

Stereo

Modulator

FM/AM

TUNER

UNIT

(TOP

VIEW)

Pin26

Pero]

:

nba

TUNER

AMP

UNIT

19

DCV

Pinta

|

Meter

-

DECK

UNIT

=

Zz

2

c

uw)

z

>]

=

<

=

1s

}Pin4

GGD1019

FM/AM

TUNER

UNIT

(BOTTOM

VIEW)

ry

DECK

UNIT

Pte

i

Center

mV

Meter{2}

‘Fig:

3

amy.

KEH-P7400,P7450

Modulation

M:MONO

MOD.,

400Hz

30%(22.5kHz

Dev.)

or

400Hz

100%(75kHz

Dev.)

S$

:STEREO

MOD.,

1kHz,

L

or

R=30%(20.25kHz+7.S5kHz

Dev.)

NOTE:Before

proceeding

to

further

adjustments

after

switching

power

ON,

let

the

tuner

run

for

ten

minutes

to

allow

the

circuits

to

stabifize.

.

FM

ADJUSTMENT(KEH-P7400/UC)

ine

No.

|

Frequency(MHz}

Frequency(MHz)

|

Point

{Switch

Position}

unvor

[1

|

ee

|

eee

07.9

|

ts

CV

Meter:ev

if

iz

|

om

|

go

|S

|

51

Center

Meter:0

=

antcoi

|3

|

981M

|

5

tga

tev

Meter):

Maximum

pecot

la

|

981m

[

5

|

gat

|

ta

mv

Meter(t):

Maximum

Se

a a

(STEREO

MODE)

Pe

eee

mV

Meter(1)

:

Separation

5dB

{STEREO

MODE)

eho

|

FM

ADJUSTMENT(KEH-P7450/ES})

FM

SSG

Adjustment

Method

.

Frequency{MHz)

{Switch

Position)

sence soone

108.0

LS

DC

V

Meter:

6V

|

931m

|

60

|

98%

|

751

‘[CenterMeter:0

|

saim

|

5

|

98.1

2

|

98imM

|

6

|

ri

:

Maxi

Adjustment

Point

Displayed

L

|

oat

|

LA

|

mV

Meter(1):

Maximum

as

a

(STEREO

MODE}

a

ee

{STEREO

MODE}

DOLBY

NR

ADJUSTMENT

,

{Switch

Position)

{400Hz,200nwb/m)

(DOLBY

NR

Switch

:

OFF)

@

For

Repair

of

the

Key

Board

Unit,

Use

the

Extension-Cord

Tool

GGD

1056.

—@

For

Repair

of

the

Cassette

Mechanism

Module,

Use

the

Extension-Cord

Tool

GGD1019.

KEH-P7400,P7450

5.

IC

INFORMATION

PA4023A

a

(40

334

PA4024A

KEH-P7400,P7450

@

Functions(PD4682A,PD4684A}

|

PinName

|

VO

|

Format__|

FunctionandQperation

No.

|

tC

RST

CUT

OCT

CC}

WDLOGICresetoutput

tt

—s—s—iz

|

2

IDSEL

dT

OU

CCE:

WD-LOGICselectoutput

tt

—“‘“‘(‘(‘(‘(‘(C;*=*™

Pe

8

ONG.

Nob

ised:

{5

J

IpRDyY

of

TT

ID

LOGIC

readyinput

—

s—“—‘“‘C‘“‘“‘SC*d

et

——

7

AVREF1

Connect

to

VDD

|

BCU

KYDT

CUT

TTC

CC*dLsC

Kg

atta

intput

|

8ST

PDT.

CWT

OC]

CCC*dCL;SC#@Display

at

output

=

i

(

i

t~—“‘“CS*S*s*™CY

|

10 Ct

SWwvbD,

|

OO

|

Cl

CO|SCGrrillepowersupplycontrol

output

—Cs~—CsCid

11

tio

sa

se

ID

LOGIC

communication

datainput

Cd

t=

2

|}oO

|

¢€

|

1D-LOGIC

communication

dataoutput

sd

|

13)—C|

OKC‘

Od

CC

tD-LOGIC

communication

clock

output

—

sd

}

14ST

MSIN,

Cd]

S|

ti“‘(‘’SS*dL

OMSsense——(s—“‘“‘(‘(‘(‘(‘(‘(<‘

NSC

|

15

CT

TESWU

tC

tCC~“‘C‘S*CLSMWttlseesepinput,

——

—C(‘“‘SCOCO;OOOOOOCOC(‘*S

|

16

~—s|

POS(TSI)

=f

1

|

Position

sense

|.

17

_|

RES(TSO)

[1

|

Cassette

mechanism

reverse

end

sense

input

|

18

~~

|

NES(TCK)

|i

|

~——sd|_

ss

Cassette

mechanism

forwardendsenseinput

si

|

19

)~=—SC

|

DIROCUE

OCU]

CCCC*dSS;s«s«SHeaa

FX

selectoutput

=

(

ii‘“‘S™SCSCS™*;*~*z

|

20

~—d|

PLAY.CUdT

OCU]

CCC‘L:(CWMS

gin

selecttoutputt—

—“‘“‘(NCOCOC;C*S

|

21

DLBYBC)

{|

Oh]

CCE:

SCDolbyNRB/Cselectoutput

=

a

—i‘CSC*‘*z”

fe

ee

Me

Oza

tf

te

—

ot

ORR

oe

ne

yy

|

23—C—iédE

SC?

sw

CTO

CU

CST

Cassette

mechanism

sub

motorcontrofoutput

pf

SEN

OG.

Cassette

merhinisrn

sub

motor

cuntcol

@uspat

|

25

CM

es

|

26S

STBY.

CUT

OC]

CTCC*dCL:“sSCSSSStané-byconntrgh._

—

(=

s

—“(‘“‘(‘(‘(‘CC*”r

|

22...

LOADSW

|

1

|

Tapeloadinginput_

et

—“‘“‘;‘S;SCSCOCOCCOCOCOCOCOC‘*dS

ee

<a

ea

6

a

BS

ee

ae

Pit

Pldatainput

i—‘“‘™OOCOCC*r

PPD

P30

PCK.CCUdT

CUT

CY

Pltcclockoutput

———s—“—‘“—“‘“‘“‘“

;NSC*dzr

P31

Sf

PDOTCUdT

CUT

CCT

Pitataoutputt

i“

;™CC*dz

|

32,——idT

PCE™F™CUdT

CUT

CCOSdYSPldatachipenableoutput

—

—‘“‘“‘C;*™*™*™*~C~*™

P33

SC

SS.

TT

GND

es

Re

a

ON

oe

natin

ll

Aloe

ore

ok

ual

|

A

OTERO

IMPUG

2-2

tu

we

- —

ee

en

i

|. 35

|

SPMPXO.

| O

|

C

|

~MPXoutputforspectrumanalyer

Cid

|

3637.

—Ss|

SPMPxt2

[O

|

N

|

MPXoutputforspectrumanalyer

|

38

DED

SCC=dT

CUT

UN

Alarm

LED

output

|

39S

DOORH

TO

Cd

CS

Door

system

select

output

|

40)

DRELAY

[|

O

|

CO

Externatrelayoutput)

——‘“—sCSCSCisS

;

ASENB

|

O

|

C

___|_

Slave

power

supply

control

output

ye

eee

Ee

ee

SS

aaa

aa

ee

|

44

CT

MUTE

™=—Dd

[OCU]

CCOdSSystemmuteoutput)

——SCCsd

|

45

UT

PEEFF™CdL

OCT

CCS

Beep

tone

output

|

46

#|vST

[Oj

C

|

Strobe

pulse

output

for

electronic

volume

|

47

SCT

TCC‘“ECO]

OT

CST

sCDataoutputforelectronicvolume

=

Cid

|

48

CUT

CK

CUCU

OCT

CS

Chock

outputforelectronicvolume

Cd

fe

MO)

aon

oes

co

ic

COCR

MORIGLNONTE

OUNMIE

cc

ote

oe

ne

|

bo

|

ECDPWe

TO

UT

CO

tCD

backlight

power

supply

control

output

Cd

|

51

|syspw

[o

{

c

_]

System

power

supply

control

output

P52

COUNT

Notts

ew.

B3

EPSENG

oe

ffs

fp

..

-Flap-close-sense-

input.

----

4

ANd

SLON

wiatesiv

a

siched

saetera

eae

hoa)

%

|

54

CT

SENS

|

tT

SEsituminationsense

input)

—s—‘—s‘—SsSCSCsS

55

CUT

TELIN,

=—So[

iTS

CS——C*édTSCsTEL

mute

signalinput)

=

—‘“‘“CS;™S™S*™*™*™C™C~*™

P56

CUT

TX.LLCC™C«dECC

ECP

BUSdataoutput

———‘“‘“‘“‘“‘“‘“(‘(S!™C*zr

|

67)

RXC—“—~i~dCC(

PM

TC—C“‘(S*@L:«CIPCBUSatginput—

5s

————“(‘C!COCOC™~™~™—C—CCY

|

s8—StCidE

DRISENSS

oJ

3hCU|

CS

Dooropenjclosesenseinput_

=

C—C‘C‘CSsCSYS

fe

OO

ESD

A

os

ts

SD

INDIR

3

ee

te

KEH-P7400,P74560

Function

and

Operation

DD

yO

Back

up

power

sense

input

es

Cd

CY

|

sds

ACC

power

sense

input

|

sd

Grille

detach

sense

Dimmer

seiect

output

ae

El

|

Powersupply

|

69

X2

x1

ND

pe

ORO

5

Sere

ck

pl

— —

—

~

Oo

[2

80

—

[NE

=|

*PD4682A,PD4684A

i=)

[Formats|

Meaning,

sd

CMOS

| N

|

Nchannel

open

drain

IC's

marked

by*

are

MOS

type.

Be

careful

in

handling

them

because

they

are

very

liable

to

be

damaged

by

electrostatic

induction.

-*PD4633A

AO0-A17:Address

input

00-07

:Data

ovtput

CE1,2

:Chip

enable

input

OE

:Output

enable

input

10

Pioneer KEH-P7400 User manual

Popular Cassette Player manuals by other brands