Pioneer CT-F850 Bedienungsanleitung

CASSETTE

TAPE

DECK

T=F-Ss50

PIONEER’

MODEL

CT-F850

COMES

SIX

VERSIONS

DISTINGUISHED

FOLLOWS:

220V

and

240V

(Switchable)

120V,

220V

and

240V

(Switchable)

120V

only

U.S.A.

mode!

120V

only

Canada

mode!

;

Europe

model

220V

and

240V

(Switchable)

United

kingdom

model

120V,

220V

and

240V

(Switchable)

General

export

model

U.S.

military

model

This

service

manual

applicable

the

CT-F850/KU,

KC.

For

servicing

the

other

types,

please

refer

the

additional

service

manuals.

CONTENTS

SPECIFICATIONS

...............0200es

FRONT

PANEL

FACILITIES..............

LEVELDIAGRAM.................-05-

DISASSEMBLY

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

0.02

eee

PARTS

LOCATION

...............00005

BLOCK

DIAGRAM

............-200000-

CIRCUIT

DESCRIPTIONS

7.1

Recording

and

playback

circuit

........

7.2

Tape

selector

and

equalizer...........

7.3

Level

meters

circuit................

7.4

Dolby

circuit

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

7.5

Control

circuits

..............000-

7.6

Muting

circuits

...........020000ee

MECHANICAL

ADJUSTMENTS

8.1

Pinch

roller

pressure

adjustment

.......

8.2

Tape

speed

adjustment

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

8.3

Tape

guide

adjustment..............

ELECTRICAL

ADJUSTMENT

9.1

Head

azimuth

adjustment............

9.2

Playback

equalizer

adjustment

........

9.3

Playback

level

adjustment

...........

9.4

Level

meter

adjustment

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

9.5

Bias

trap

adjustment

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

Erasure

current

adjustment...........

Bias

adjustment

...............0--

9.8

Recording

frequency

response.........

9.9

Recording

level

adjustment...........

9.10

Recording

Dolby

level

adjustment...

9.11

Playback

Dolby

level

adjustment

....

10.

EXPLODED

VIEWS

TOET

(EXtENOn

sui

eeee

Sie

biden

cae

els

10.2

Mechanism

assembly

1.............-.-

10.3.

Sub-chassis

.......

0...

2.02

aes

10.4

Mechanism

assembly

2..............

11.

SCHEMATIC

DIAGRAMS,

P.C.

BOARD

PATTERNS

AND

PARTS

LIST

11.1.

Miscellaneous

parts

list

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

11.2

Connectiondiagram

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

11.3.

Schematic

diagram

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

11.4

P.C.

boards

connection

diagram.

.......

11.5

Mother

assembly(RWX-302)..........

11.6

Power

supply

and

control

assembly

.....

(RWR-076)

11.7.

Indicator

amp

assembly

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

11.8

Sensing

assembly

...............4.

11.9

Indicator

assembly

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

11.10

Function

indicator

assembly

..........

11.11

Switch

assembly

............0...00-

11.12

Fuse

assembly

................00.

12:

PACKING

okie

bei

eiaieties

SPECIFICATIONS

Systems.........--

Compact

cassette,

2-channel

stereo

Motors

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

Capstan

drive;

servo

motor

Reel

drive;

high

torque

motor

Heads:

eeene

dee

ears

Sendust

recording/

playback

combination

type

head

Erasing

head

Fast

Winding

Time

.........

Approximately

seconds

(C-60

tape)

Wow

and

Flutter........

than

0.04%

(WRMS)

Frequency

Response

—20dB

Recording

;

Standard,

tapes

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

17,000Hz

(25

15,000Hz

+3dB)

Ferrichrome

tape

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

18,000Hz

(25

17,000Hz

+3dB)

Chromium

dioxide

tape

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

18,000Hz

(25

17,000Hz

£3dB)

Metal

tape...

2...

....-2-00

0006

19,000Hz

(25

18,000Hz

+3dB)

OdB

Recording

;

Chromium

dioxide

tape

.........-.

11,000Hz

Metal

tape

............2-002-08-

14,000Hz

Signal-to-Noise

Ratio.

Dolby

OFF;

than

59dB

Dolby

;

than

69dB

(over

SkHz)

Harmonic

Distortion

........

than

1.2%

(OdB)

Inputs

(Sensitivity/Maximum

allowable

input/Impedance)

MIC

(L,

R);0.3mV/100mV/10kilohms,

6mm

diam.

jack

(Reference

MIC

impedance;

250

ohms

kilohms)

LINE

(64mV/25V/85

kilohms)

jack

Outputs

(Reference

level/Maximum

level/Load

impedance)

LINE

(450mV/630mV/50

kilohms)

jack

HEADPHONES

70mV/98mV/8

ohms,

6mm

diam.

jack

Semiconductors

Amplifier

Section

........

Transistors

49,

ICs

10,

Diodes

(including

Zener

Diodes

LEDs

Motor

control

Section

.....

Transistors

Diode

Subfunctions

Dolby

system

(ON-OFF)

with

LED

indicator

lamp

Fluorescent

tube

level

meter

(—20

+8dB)

(Peak/Average

selector)

Bias

fine

adjusting

control

knob

position

tape

selector

(STD/METAL/CrO,/Fe-Cr)

Automatic

tape

slack

canceller

Cassette

compartment

illumination

Standby

mechanism

with

unattended

recording

Output

level

controls

with

click

stop

for

reference

playback

level

CT-F8ss50

Power

Requirements

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

120V

60Hz

Power

Consumption

...........--02000%

watts

Dimensions

.......

420(W)

150(H)}

361(D)

Max.

16-9/16

5-15/16

14-1/4

in.

Weight

..........

0.02.

9.2kg

(20

oz.)

Furnished

parts..........

Stereo

connecting

cords

with

plugs

Head

cleaning

swabs

Operating

instructions

NOTE:

Specifications

and

the

design

subject

possible

modifi-

cation

without

notice

due

improvements.

NOTES:

Reference

Tapes:

Standard

LH:

DIN

45513/BLATTE6

equiv.

CrO,:

DIN

45513/BLATT7(CrO,

)

equiv.

Reference

Recording

Level:

Meter

OdB

indicating

level

(160

nwb/m

magnetic

level

Philips

cassette

reference

level)

Reference

Signal:

333Hz

Wow

Flutter:

JIS

[3kHz,

with

acoustic

compensation

(weighted),

rms

value]

Frequency

Response:

Measured

—20dB

level,

DOLBY

OFF,

level

deviation

$6dB

without

indication.

Signal

Noise

Ratio:

Measured

the

third

harmonic

distor-

tion

level,

weighted.

Sensitivity:

Input

level

(mV)

required

for

reference

recording

level

with

input

(REC)

controls

set

maximum.

Maximum

Allowable

Input:

While

decreasing

settings

input

(REC)

tevel

controls

and

increasing

level

input

jacks,

this

the

maximum

input

level

(mV)

the

point

where

recording

amplifier

output

waveform

becomes

clipped.

Reference

Output

Level:

Playback

output

level

when

meter

indicates

OdB.

10.

Maximum

Output

Level:

Playback

output

level

with

respect

reference

recording

level

when

output

(PLAY)

level

controls

are

set

maximum.

Unit

FRONT

PANEL

FACILIES

Cassette

compartment

illumination

ens

neenfemnn

SENOUST

COM

CLOSED

LGOP

DUAL

CaPSTAN

2-MOTOR

Tap

(POWER

SWITCH

The

power

comes

when

the

POWER

switch

depressed.

The

level

meter

and

the

cassette

compartment

illumination

will

then

come

on.

DUST

COVER

When

you

are

not

using

the

deck,

always

keep

this

cover

place

prevent

dust

and

dirt

from

adhering

the

head

section

and

rotating

parts.

REMAINING

TAPE

MARKER

this

marker

visible,

means

that

there

enough

tape

remain-

ing

for

several

minutes

recording

playback

@TAPE

COUNTER

This

indicates

the

position

the

tape

run.

(5)

TAPE

COUNTER

RESET

BUTTON

Depress

this

button

reset

the

tape

counter

display

“000.”

(MONITOR

SWITCH

This

switch

used

to:select

the

output

signals

including

those

the

headphones.

The

level

meter

display

also

selected

simulta-

neously

and

when

adjusting

the

recording

level,

sure

set

this

switch

SOURCE

(depressed

position).

For

recording:

you

depress

this

switch

SOURCE,

you

will

able

listen

the

signals

(recording

input)

just

before

they

are

recorded.

you

then

release

switch

TAPE,

you

will

able

hear

the

signals

immediately

after

they

have

been

recorded

(playback

sound).

Select

this

switch

while

you

are

recording

(alternately

between

TAPE

and

SOU

RCE)

and

monitor

the

recording.

Release

the

switch

TAPE.

You

will

not

able

listen

the

playback

sound

the

switch

set

SOURCE.

For

playback:

©®

@METER

SELECTOR

SWITCH

PEAK:

When

this

switch

depressed

PEAK,

the

meter

functions

peak

meter.

AVERAGE:

When

the

switch

released

AVERAGE,

the

meter

functions

ordinary

level

meter.

(DOLBY

SWITCH

Set

this

switch

for

recording

with

the

built-in

Dolby

noise

reduction

system

and

for

the

playback

tapes

which

have

been

recorded

using

the

Dolby

system.

@TAPE

SELECTOR

This

selector

allows

the

bias

and

equalizer

characteristics

selected

during

recording

and

the

equalizer

characteristics

during

playback

line

with

the

type

tape

you

are

using.

METAL:

For

using

metal

tapes

STD:

For

using

ordinary

tapes

CcrO

For

using

chrome

tapes

Fe-Cr:

For

using

ferrichrome

tapes

(BIAS

CONTROL

Use

this

control

adjust

the

bias

accordance

with

the

characteristics

the

tape

being

used.

set

that

the

center

(click

stop)

position

corresponds

the

standard

bias.

CLOSED

LON

DUAL

CaPsTans

@-MOTOR

TAPE

TRANSPORT

SYSTEM

()METALTAPE

INDICATOR

This

light

comes

when

the

TAPE

selector

set

METAL.

(DOLBY

INDICATOR

This

lights

when

the

DOLBY

switch

set

and

indicates

that

tape

being

recorded

played back

with

the

Dolby

system.

(3LEVEL

METERS

These

indicate

the

input

level

during

recording

and

the

output

level

during

playback.

operating

the

METER

selector

switch,

can

made

func-

tion

peak

meter,

level

meter.

The

input

signal

level

indicated

when

the

MONITOR

switch

has

been

depressed,

and

the

playback

output

level

indicated

when

the

MONITOR

switch

has

been

released.

(INPUT

(RECORDING

LEVEL)

CONTROLS

Use

these

adjust

the

level

the

input

signals

from

the

MIC

jacks

rear

panel

INPUT.

Turning

these

controls

the

right

increases

the

level.

The

controls

are

coupled

the

left

and

right

channels,

but

you

can

also

use

them

adjust

the

right

channel

(back)

and

the

left

channel

(front)

independently.

OUTPUT

(PLAYBACK

LEVEL)

CONTROLS

Use

these

adjust

the

output

signal

level

during

playback.

Turning

the

controls

the

right

increases

the

level.

The

controls

are

coupled

when

turned

but

also

possible

adjust

the

right

channel

(back)

and

the

left

channel

(front)

independently.

When

playing

back

reference

tape

(160

nwb/m),

reference

playback

level

(0dB)

obtained

with

these

controls

set

the

“6”

click

stop

position.

(MIC

JACKS

These

are

the

input

jacks

for

microphone

recording.

Plug

the

left

channel

microphone

into

the

jack

and

the

right

channel

micro-

phone.into

the

jack.

CT-F8S8s50

SDOROOSsEeRsIe

mee

-20

-"0-7-5-2

43-88

tt)

()HEADPHONES

JACK

This

the

output

jack

for

your

stereo

headphones.

You

will

able

hear

sound

from

signals

selected

the

MONITOR

switch.

Use

this

jack

when

you

want

monitor

the

quality

recording

when

you

want

listen

tape

privately

the

CT-F850.

NOTES:

Use

low-impedance

headphones.

you

use

high-impedance

model,

you

will

not

able

obtain

sufficient

volume.

You

will

damage

the

microphone

you

plug

-it

into

the

PHONES

jack

mistake.

@SOPERATING

SWITCHES

(REW):

Depress

this

switch

rewind

the

tape

high

speed.

(The

tape

will

travel

from

right

left.)

(FF):

Depress

this

switch

send

the

tape

forward

high

speed.

(The

tape

will

travel

from

left

right.)

(STOP):

Depress

this

switch

stop

the

tape

run

and

release

the

operating

switches.

(PLAY):

Depress

this

switch

when

playing

back

tape.

(The

tape

will

travel

from

left

right.)

REC:

Depress

this

switch

together

with

the

(PLAY)

switch

for

recording.

This

switch

will

not

work

when

cassette

not

loaded

when

the

erasure

prevention

tabs

loaded

cassette

have

been

broken

off.

PAUSE:

Depress

this

switch

stop

the

tape

temporarily

during

recording

playback.

Depress

again

allow

the

tape

continue

travel

before.

NOTES:

When

any

the

operating

switches

are

depressed,

the

cor-

responding

indicator

(except

STOP

mode)

will

come

signifying

that

the

deck

set

that

respective

mode.

The

operating

switches

will

not

return

their

original

posi-

tions

even

when

the

power

switched

OFF.

Manufactured

under

license

from

Dolby

Laboratories.

Dolby

and

[XQ]

are

trademarks

Dolby

Laboratories.

LEVEL

DIAGRAM

PLAYBACK

DOLBY

AMP

AMP:

TAPE

(MONITOR)

LINE

OUT

FLAT

AMP

GuzpuT

LEVEL

CONTROL

ADJ.

HEADPHONES

+5.1dBV

3dav

(0708v)

LO-S:4d8v}

7aBv

~10

(0.48V)

—(o.447Vv)

RL:50kN.

RL:

22.7

48v

(56.23

mv)

(70.79mv)

(73.3

mv)

-30

-36dav

aed

(15.85

)

-40

twa

-60

dBV

FREQUENCY:

333

~70

-74aBv

{0.20mvV

)

-80

CT-F850

RECORDING

LINE

DOLBY

REC

BIAS

AMP.

TRAP

LINE

REC

LEVEL

HEAD

CONTROL

INPUT

LEVEL

MIC

CONTROL

AMP.

(MONITOR)

osc

-3

48v

—-—_

-3

d8v

©®

-10d8v

(0.708v)

-s8¢av

(a708v)

sto

(0.398V)

dicta

dee

-18.74BVv

ERT

-20

O.lleV)

MAX.

7.58mv

bseou=-

-27308v

aoetov

@-26a8}v

-28.5

d8v

24.5dBV

;

(50.12

mV)

-—

301

(59.57mv)

(43-15m¥)

aes

-4

1.86mV)

RMANG

Mince

ees

-4348v

MAX

(708

mv)

-50

-~43d8V

ae:

{]

-60

(osomv)

FREQUENCY:

333Hz

-70

-71.9dBV

(0.25

mv)

-80

max:

DISASSEMBLY

EXTERNAL

COMPONENTS

Undo

screws

1—4

remove

the

bonnet.

Undo

screws

5—10

remove

the

front

panel.

38.

Undo

screws

11—18

and

remove

washer

remove

the

base

plate.

Fig.

4-1

Disassembly

externa!

part

CT-F3s50

FLUORESCENT

DISPLAY

TUBES

Undo

the

single

screw

remove

the

display

assembly.

The

fluorescent

display

tubes

are

mounted

inside

the

display

assembly,

and

will

require

the

use

soldering

iron

for

removal.

This

step

must

be:

performed

carefully

order

prevent

damage

component

parts.

MECHANICAL

ASSEMBLY

Once

the

front

panel

has

been

removed,

undo

screws

1—6.

Mechanical

Indicator

amp

assembly

Fig.

4-3

Removing

the

fluorescent

display

tubes

Fig.

4-2

Removing

the

mechanical

assembly

Sub-Head

Base

Ass’y,

Pinch

Roller

Arm

Ass’y

and

Pressure

Arm.

remove

the

pressure

arm,

simply

remove

washer

When

pinch

roller

pressure

spring

Undo

screws

and

the

hexagonal

socket

replaced,

take

special

note

the

head

bolt

remove

the

sub-head

base

assem-

original

spring

position.

will

also

neces-

bly.

sary

readjust

spring

pressure

accordance

Undo

the

height

adjuster

nut

remove

the

requirements

specified

under

the

section

pinch

roller

arm

assembly

the

supply

reel

‘Pinch

roller

pressure

adjustment’?

side.

page

25.

Then

remove

washer

remove

the

pinch

roller

arm

assembly

the

take-up

reel

side.

Height

adjuster

Pinch

roller

arm

assembly

(supply

reel)

Hexagonal

socket

head

bolt

Sub-head

base

assembly

Pinch

roller

arm

assembly

(take-up

reel)

Fig.

4-4

Removing

the

sub-head

base

ass’y,

pinch

roller

arm

ass’y

and

Pressure

arm

MECHANICAL

ASSEMBLY

COMPONENT

PARTS

Undo

screws

6—10

remove

the

plunger

chas-

When

the

motor

belt

needs

replaced,

take

sis

assembly.

special

note

the

order

which

component

Undo

screws

11—16

remove

the

sub-chassis

parts

are

disassembled

and

reassembled.

assembly.

Remove

the

capstan

motor

undoing

screws

Then

remove

the

take-up

reel

motor

un-

1—3

and

washers

1—3.

Solenoid

removed

undoing

screws

Screws

Take-up

reel

motor

Capstan

Flywheel

tieror

Fig.4-5.

Removing

mechanical

assembly

component

parts

doing

screws

and

18,

and

washers

and

Solenoid

removed

undoing

screws

and

20.

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