Pioneer CT-F615 User manual

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1

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CASSETTE

TAPE

DECK

|

T-FG61

YPIONEER’

MODEL

CT-F615

COMES

IN

ONE

VERSION

DISTINGUISHED

AS

FOLLOWS.

Voltage

Remarks

120V

only

U.S.A.

model

CONTENTS

}

1.

SPECIFICATIONS

.......

testa

dese’

Dede

3

10.

SCHEMATIC

DIAGRAMS,

P.C.

BOARD

2.

FRONT

PANEL

FACILITIES

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

4

PATTERNS

CUD

EAR

sot,

3,

DISASSEMBLY

..........0..0es

ees

ee

ee

6

HOSL.,

MUMpCoM

ANOS

«sti

atte

ate

tac

hcio

24

4.

PARTS

LOCATION

................22

2.

7

10.2

Schematic

Diagram

..........

Ae

Seah

25

5.

LEVEL

DIAGRAM

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

9

10.3.

P.C.

Board

Connection

Diagram

......

28

6.

BLOCK

DIAGRAM

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

1

10.4

Connection

Diagram

...........-..

31

7.

CIRCUIT

DESCRIPTIONS

10.5

F.L.Meter

Assembly

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

32

71

Slafial

Pathes+c8)

<4

yuanien

cca

sadee

13

10.6

Mother

Assembly

.............04-

33

7.2

Recording

and

Playback

Circuit.

......

13

EO

,7-*

sich

Smrttch

PAsseMINY

arse

src

oth

37

73

Control

Circuit...

2...

ce

cece

eee

15

TOE

NIUE

ROMY

ca

oes

Sra

eas

37

7.4

MutingCircuit..........0.

00000.

16

Ore

er

maa

ae

reac

aenee

p

ear

aes

a?

75

Piiniind

CHaphes

cose

hosed

ee

atescta

lod.

hs

17

10.10

Timer

Switch

Assembly

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

37

8.

MECHANICAL

ADJUSTMENTS

11.

EXPLODED

VIEWS

AND

PARTS

LIST

8.1

Pinch

Roller

Pressure

Adjustement.....

19

WT

aL

PEATE

ON

COMPODEUE

ci

2.aeSpto

en

ney

ve

8.2

AubeliBase

Toegue‘Adjustients

ao2%0.2

19

11.2

Interior

Component

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

41

g's

itaps

Sheed

Adiustnentes-is

eked

teae

49

12.<

PACKING

|

2

assed

ae

eeu

be

desde

eee

ge

ee

o's

44

8.4

Play

Solenoid

Adjustment

..........

19

8.5

F.F

Solenoid

Adjustment

ep hb

aie.

&

Ane

ie

ms

20

8.6

REW

Solenoid

Adjustment

..........

20

8.7

REC

Solenoid

Adjustment

..........

20

9.

ELECTRICAL

ADJUSTMENTS

9.1

Head

Azimuth

Adjustment........<.

21

9.2

Playback

Equalizer

Check

..........

21

9.3

Playback

Level

Adjustment

.........

22

9.4

F.L.

Meter

Adjustment

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

22

9.5

Recording

Rough

Adjustment

........

22

9.6

Erasure

Current

Adjustment

.........

22

9.7

Bias

Trap

Adjustment

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

22

98

Recording

Bias

Rough

Adjustment...

..

22

9.9

Recording/Playback

Frequency

Response

Check

and

Adjustment

......

22

9.10

Recording

Level

Adjustment.........

23

NOTE;

@

This

service

manual

is

applicable

to

the

CT-F615/KU

type

which

serial

numbers

from

ZL3600001

through

ZL3600100.

e

As

an

improvement,

the

mother

assembly

was

modified

of

which

serial

numbers

are

after

ZL3600101.

For

detailed,

refer

to

the

additional

service

manual

on

page

45.

1.

SPECIFICATIONS

SYSTEMS

os

gov

Ss

eS)

BOs

a

Compact

cassette,

2-channel

stereo

IMOLOt

eo

ia,

gt

el

ace

da

et

etets

ee

Us,

cane

te

See

ee

DC

servo

motor

x

1

Heads

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

“Sendust’’

recording/playback

head

x

1

:

F

Erasing

head

x

1

Fast

Winding

Time

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

Approximately

100

seconds

(C-60

tape)

Wowand

Flutter...

2.0.2.0...

No

more

than

0.06%

(WRMS)

Frequency

Response

Standard,

LH

tapes...

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

20

to

15,000Hz

(25

to

14,000Hz

+

3dB)

Ferrichrome

tape...

2...

2.2.0.0 0-.0004

20

to

17,000Hz

(25

to

16,000Hz

+

3dB)

Chromium

dioxide

tape

..

2.

....2..20.0.

20

to

17,000Hz

(25

to

16,000Hz

+

3dB)

Metal

tape............00000eeeee

20

to

18,000Hz

(25

to

17,000Hz

+

3dB)

.

Dolby

NR

OFF;

More

than

58dB

Dolby

NR

ON;

More

than

68dB

(over

5kHz)

Harmonic

Distortion...

.........

No

more

than

1.3%

(QdB)

Input

(Sensitivity/Maximum

allowable

input/Impedance)

MIC

(L,

R);

0.3mV/100mV/10

kitohms,

6mm

diam,

jack

(Reference

MIC

impedance;

250

ohms

to

10

kilohms)

LINE

x

2;

50mV/25V/75

kilohms

Pin

jack

Output

(Reference

level/Load

impedance)

LINE

x

2;

450mV/50

kilohms

Pin

jack

HEADPHONES

x

1;

73mV/8

ohms,

6mm

diam.

jack

Semiconductors

Signal-to-Noise

Ratio

Amplifier

Section

..............00-

Transistor

x

55

Diodes

x

45

(Zener

x

3,

LED

x

3), ICs

x

5

Motor

control

Section.

.........

Transistor

x

2,

Diode

x

1

Subfunctions

.

e@

Air

damp

eject

function

e@

Fluorescent

display

level

meter

(—20

to

+8dB)

e

4position

tape

selector

(STD/Fe-Cr/CrO2/METAL)

@

IC

logic

control

CT-F615

e

Dolby

NR

system

(ON/OFF)

e@

Standby

mechanism

with

unattended

recording

e

REC

muting

function

e@

Full

automatic

stop

mechanism

Power

Requirements.

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

AC120V,

60Hz

Power

Consumption

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

0000

aes

31

watts

Dimensions

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

420(W)

x

98(H)

x

328(D})mm

Max.

16-9/16

x

3-7/8

x

12-15/16in.

Weights

o

aares

dog

ete

ack

be

ere

hohe

algae

An

is

6kg

(13

tb

40z)

Furnished

Parts...

..

Stereo

connecting

cords

with

pin

plugs

x

2

Head

cleaning

swabs

x

3

Operating

instructions

x

1

Note:

Specifications

and

the

design

subject

to

possible

modification

without

notice

due

to

improvements.

NOTES:

1.

Reference

Recording

Level:

Meter

OdB

indicating

level

(160

nwb/m

magnetic

level

=

Philips

cassette

reference

level)

2.

Reference

Signal:

333Hz

3.

Wow

&

Flutter:

@

JIS

[3kHz,

with

acoustic

compensation

(weighted),

rms

value]

4.

Frequency

Response:

@

Measured

at

—20dB

level,

DOLBY

NR

OFF,

level

deviation

is

+6dB

without

indication.

5.

Signal

to

Noise

Ratio:

@

Measured

at

the

third

harmonic

dis-

tortion

3%

level,

weighted.

6.

Sensitivity:

Input

level

(mV)

required

for

reference

recording

level

with

input

(REC)

controls

set

to

maximum.

7.

Maximum

Allowable

Input:

While

decreasing

settings

of

input

(REC)

level

controls

and

increasing

level

at

input

jacks,

this

is

the

maximum

input

level

(mV)

at

the

point

where

recording

amplifier

output

waveform

becomes

clipped.

8.

Reference

Output

Level:

Playback

output

level

when

meter

indicates

OdB.

.

*

Manufactured

under

license

from

Dotby

Laboratories,

*Dolby

and

90

are

trademarks

of

Dolby

Laboratories.

2.

FRONT

PANEL

FACILITIES

@

POWER

SWITCH

Power

is

supplied

to

the

deck

when

this

switch

is

set

to

ON,

and

the

level

meter

lights

up.

To

turn

OFF

the

power,

set

it

to

bottom

position.

@

TIMER

START

SWITCH

This

is

used

when

the

timer

is

employed

along

with

the

deck

for

unattended

recording

and

wake

up

playback.

REC:

Set

to

this

position

to

set

the

deck

automatically

to

the

recording

mode

at

the

time

preset

on

the

timer

and

to

start

the

recording

of

programs

unattended,

for

in-

stance.

OFF:

Set

to

this

position

for

normal

tape

playback

and

record-

ing.

PLAY:

Set

to

this

position

to

set

the

deck

automatically

to

the

playback

mode

at

the

time

preset

on

the

timer

and

to

start

the

playback.

The

tape

playback

function

can

be

used

to

wake

up

in

the

morning

instead

of

an

alarm

clock.

@

CASSETTE

HOLDER/EJECT

BUTTON

The

cassette

tapes

are

loaded

into

this

holder.

It

jumps

out

when

the

EJECT

button

is

depressed.

To

close

the

holder,

push

the

top

back

until

it

locks.

@

REMAINING

TAPE

MARKER

if

this

marker

is

visible,

it

means

that

there

is

enough

tape

remain-

ing

for

several

minutes

of

recording

or

playback.

@

COUNTER

RESET

BUTTON/TAPE

COUNTER

Depress

this

button

to

reset

the

tape

counter

display

to

“000.”

Tape

counter

indicates

the

position

of

the

tape

run.

@®

LEVEL

METERS

These

indicate

the

input

level

during

recording

and

the

output

level

during

playback.

@

INPUT

(RECORDING

LEVEL)

CONTROLS

Use

these

to

adjust

the

level

of

the

input

signals

from

the

MIC

jacks

or

rear

panel

LINE-INPUT.

Turning

these

controls

to

the

right

increases

the

level.

The

controls

are

coupled

to

the

left

and

right

channels,

but

you

can

also

use

them

to

adjust

the

right

channel

(back)

and

the

left

channel

(front)

independently.

HEADPHONE

JACK

This

is

the

output

jack

for

stereo

headphones.

Plug

your

head-

phones

into

this

jack

when

you

want

to

monitor

the

quality

of

a

recording

or

when

you

want

to

listen

to

a

tape

privately.

NOTES:

@

Use

low-impedance

headphones.

If

you

use

a

high-impedance

model,

you

will

not

be

able

to

obtain

sufficient

volume,

©

You

will

damage

the

microphone

if

you

plug

it

into

this

jack

by

mistake.

@

MIC

JACKS

These

are

the

input

jacks

for

microphone

recording.

Plug

the

left

channel

microphone

into

the

L

jack

and

the

right

channel

micro-

phone

into

the

R

jack.

REC

MUTE

SWITCH

While

this

switch

is

depressed

(ON)

during

recording

(switch

is

kept

depressed),

blanks

can

be

recorded

on

the

tape

since

the

in-

put

signals

are

not

recorded.

f

@

DOLBY

NR

SWITCH

Set

this

switch

to

ON

for

recording

with

the

built-in

Dolby

noise

reduction

system

and

for

the

Playback

of

tapes

which

have

been

recorded

using

the

Dolby

NR

system.

@2

TAPE

SELECTOR

This

selector

allows

the

bias

and

equalizer

characteristics

to

be

selected

during

recording

and

the

equalizer

characteristics

during

playback

in.

line

with

the

type

of

tape

you

are

using.

STD

position:

For

using

standard

or

LH

tapes

Fe-Cr

position:

For

using

ferrichrome

tapes

HIGH

position:

Set

to

this

Position

when

using

chrome

or

metal

tapes

and

then

set

the

right-hand

switch

to

CrO2

or

METAL.

CrO.;

For

using

chrome

tapes

METAL;

For

using

metal

tapes

(3)

OPERATING

SWITCHES

4

(REW):

Depress

this

switch

to

rewind

the

tape

at

high

Speed.

(The

tape

will

travel

from

right

to

left.)

bP

(FF):

Depress

this

switch

to

send

the

tape

forward

at

high

speed.

(The

tape

will

travel

from

left

to

right.)

m

(Stop):

Depress

this

switch

ta

stop

the

tape

run

and

to

release

the

operating

switches,

>

(Play):

Depress

this

switch

when

playing

back

a

tape.

(The

tape

will

travel

from

left

to

right.)

REC:

Depress

this

switch

together

with

the

»

(Play)

switch

for

recording.

:

This

switch

will

not

work

when

a

Cassette

is

not

loaded

or

when

the

erasure

prevention

tabs

of

a

loaded

cassette

have

been

broken

off,

PAUSE:

Depress

this

switch

to

stop

the

tape

temporarily

during

recording

or

playback.

Depress

>

(Play)

switch

to

allow

the

tape

to

continue

to

travel.

NOTE:

@

The

operating

switches

will

not

return

to

their

original

Posi-

tions

even

when

the

power

is

switched

OFF.

CT-F615

3.

DISASSEMBLY

_

Mechanical

Ass’y

1.

Disconnect

the

sensing

belt

coupling

the

take-up

BONNET

ree]

base

to

the

runner.

Remove

screws

@

.

2.

Remove

screws

@.

Base

Plate

Remove

screws

@.

Front

Panel

Remove

screws

@

.

Bonnet

Fig.

1-1

Disassembly

CT-F615

the

importance

of

the

safety

factor

of

the

part.

There-

:

fore,

when

replacing,

be

sure

to

use

parts

of

identical

Front

Panel

View

designation.

4

PARTS

LO

CATION

e

The

(\

mark

found

on

some

component

parts

indicates

Front

panel

sub

assembly

RXX-285

Knob

B

(INPUT)

Eject

knob

(EJECT)

:

RAA-319

RAC-126

Knob

A

(INPUT)

Stand-by

knob

RAA-318

(TIMER

START}

RAC-127

Lever

knob

A

(POWER)

RAC-124

Lever

KnobA

(TAPE

SECLECTOR,

DOLBY

NR,

REC

MUTE)

Pocket

door

assembly

RAC-124

a

Lever

knob

B

(TAPE

SELECT)

RAC-125

Control

knob

RAC-126

Front

View

with

Front

Panel

Removed

F,L,

meter

FIP

19A

14YS

Counter

F.L.

meter

assembly

RAW-130

RWX-352

Variable

resistor

(INPUT)

Timer

switch

assembly

RCV-080

RWS-082

A

Power

switch

Headphones

jack

RSA-039

RIKN-060

Erase

head

MIC

jack

PPB-056

RKN-059

REC/PB

head

RPB-070

Lever

switch

C

(REC

MUTE)

RSK-060

Function

switch

assembly

RWS-081

Lever

switch

W

;

(DOLBY

NR)

RSK-061

Lt

ver

switch

B

(TAPE

SELECT)

RSK-059

Lever

switch

A

(TAPE

SELECT)

RSK-058

Top

View

with

Bonnet

Removed

yg)

Mother

assembly

/\Power

transformer

RTT-207

PNA

A

Solenoid

Slide

switch

(REC/

RXP-085

PLAYBACK)

RSH-049

VR

assembly

RWX-353

Sensor

assembly

RWX-354

Rear

Panel

Removed

Bonnet

RNA462

ass

S|

SSG)

.

A\

Strain

relief

Baad

ee

ence

Sarr

ra

tee

REC-272

AA

Power

code

RDG-022

4P

mount

pin

jack

(LINE)

RKB014

5.

LEVEL

DIAGRAM

Playback

P-B

Head

5

Level

(dBv)

20

fe)

-20

—31.7dBV

(26mv)

—40

-40dBV

(10mvV)

P.B.

Amp.

Gain

=41.8dB

—-60

-73.5dBV

(0.21mvV)

-80

|

|

|

|

|

|

|

|

|

|

|

|

|

|

I

|

|

|

|

|

|

|

5.6dBV

(1.9V)

Head

On

re

p

Amp.

ey

Gain=124

DOLBY

NR

ee

&

in=9,

i

ey

Gain

6dB

-~7dBV

1

Y

(0.44V)

Headphones

LINE

OUTPUT

ue

Flat

Amp.

cara

(72.4mV)

Gain

=

274dB

NOTE:

OdBV

=

1V

Frequency

:

333Hz

LINE

OUTPUT

;

Recording

Level

(dBv)

10

-20

LINE

INPUT

—10dBV

(0.31V)

MIC

Input

—21.8dBV

(81.3mv)

—28.8dBV

(36.3mvV)

MIC

Amp.

Gain

:

31.2dBV

-—40dBV

(lOmv)

—3dBV

-12.6dBV

Gain:964B

(0.23V)

-6.8dBV

(0.45v)

CT-F615

LINE

OUT

PUT

5.6dBV

(1.9V)

Headphones

Amp

Gain

=12.44B

LINE

OUTPUT

-7dBV

(0.44V)

REC

Head

xc

Headphones

Headphone

\

Output

Flat

Amp

—22.8dBV

(17.8mv)

(72.4mV)

Gain

:27.4dB

-35.4dBV

(17

mV)

-33.8dBV(20.4mv)

—33.2dBV(21.9mvV)

NOTE;

OdBV

=

1V

Frequency

:

333Hz

10

6.

BLOCK

LINE

INPUT

REC/PB

Head

osc

LINE

ee

CT-F615

DIAGRAM

S6-1:MIC/LINE

VR601:

INPUT

VR

Flat

Amp

Biastrap

S1:REC/PLAYBACK

$2:D0LBY

NR

Fe-Cr

O=—O—>

24V

S3-1

VR101

Hi

S3:

TAPE

SELECTOR

PB

S1-7

REC

Q109

Headphone

Amp

Meter

Amp

Q111

ang

#

S

ait2

WW

VR304

Q110

Qn4s

24v

Dolby

NR

REC

Amp

Q108

L102

[

at,

|

ie

Sensing

Circuit

Headphones

Erase

Head

REC/PB

Head

RCR

RCH

VR

302

VR301

OSC

Circuit

—_—

24Vv

LCH

S3:

TAPE

SELECTOR

S4:

TAPE

SELECTOR

ey

Peal

Photo

interrupter

11

Muting

Circuit

pt

$14:

EJECT

S4-2

OMETAL

OFF

S3:

TAPE

SELECTOR

S4:

TAPE

SELECTOR

MUTE

S5:

REC

Q314

Q321

REC/PB

Head

S7

$B

so

S11

S16:

:

PLAY

:

STOP

DAF

S10:

REW

:

PAUSE

S12:

S13:

REC

ERASE

PREVENT

DETECTOR

TIMER

12V

SL2

©)

:

5V

rey

Sy

alee

Q309

osi5

Q317

4

Qx16

Q306

AC3V

Q318

SL3

1

$L1:Pinch

salenoid

$L2:F.F.

solenoid

s_3:

REW

solenoid

sia:

REC

solenoid

S15

$15:

POWER

AC120V

60Hz

12

SV

sié

°

5v

(PLAY)

HOLE

NO

HOLE

$13

Q325

REC/PLAY