Pioneer CT-8-R Schematic

(D

rrloN

Erl'

Shown

Ouar?-PLL

Direct

STEREO CASSETTE

Drive/Ribbon

TAPE

Sendust

Head

DECK

eT-tr|trl

lI

GT-8Fl

r

This service manual refers
manual

of the CT-7R

l--rr

(ARP-001-0).

to the circuit

descriptions.

the

photo

is model CT-9R

For

ORDER
ARP

the mechanism discription,

-050

please

see service

NO.

-O

PICINEEFI ELECTFICINIG

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ELECTFICTNICB A|JATF|ALIA

CCIFIPCIFIATICIN 4-1. Mesu.o 1-chome,

CCIFIFCIIIATICIN A5 Oxfond Dnive, Moonechie,

N.V. Luithagen-Haven 9,

PTY.

l.rE,.

178-1A4

Antwenp, Etelgium

2O3O

Eloundeny Fload,

Mesuno-ku, Tokyo 1s3,

New iJensey O7O74, u.S.A.

Bneeside. VictoniE 3195. Aust.alie

YZ

Jepen

ODEC.I98I Printed

in

lapan

CIRCUIT

1 .

PLAYBACK

1.1
The

signal
amplified
and

Q1703.

is corrected.

The

output
level-adjusted
then

applied
amplifier,
quency

and the
Q1705

CrO2
tion

of IC601 (HA11226)
is
pin
put
switch
Dolby circuit

1.2

amplified by the mic amplifier, IC1501
4558D),
to the INPUT volume.
PUT
flat
is
Dolby circuit. In
through
(HA11226)

fier. From
recording

1.3

in CPU PD6006,
PA3010

applied
16-bit serial data,

to control the various
data transmission

This is shown in
output from

mission

expansion IC, PM3001,
clock
3001 through

response.

When

will

tape,

will be

The

output

passed

16 of

signal

to

RECORDING

The

signal input to the microphone

volume

amp IC1701

pa.ssed

then

CONTROL

The

control

When

The

16-bit

pulse

After both read

picked

by the equalization

At the

from

by variable

to

Q1705.

Q1705

normal

combination of

out

IC602

then

Q608,

head.

used in the MS function.

to

a mode key is activated,

occurs once each

tape is used,

equalization

set

Q1707

70ps.

from

pin

9. This output

and output from

from

IC602

LINE

PD6006

OUTPUT.

will be

passed

and the signal is then

(NJM4558D).

through the MPX filter

before input to the recording

the recording amp, it is

CIRCUIT

circuitry

pin

serial data is applied to

is

read into the

pin

DESCRIPTIONS

FLOW

up by the

same time,

the equalization

In

functions

also

remain

will

Q1705

in

the

passes

presented

FLOW

via

the

Level is adjusted

Dolby

the

IC602

expansion IC PM3001,

and

is output from

Fig.

7.

2.

(HA11226),

of

are transmitted to PM3001

PM3001

circuits.

1-1. Also

(Data

time the

and the leading

events are completed,

playback

amplifiers,

frequency

amplifiers

resistor

addition to being an

Q1701, Q1703,

to 120ps.

is applied

Dolby

(A

INPUT

this unit is contained

and clock

shift register of PM

VR1703 and

to correct fre-

Q1707

OFF

via the MONITOR

description

later.)

The

circuit, it is

then

wiU be ON,

For metal or

and equaliza-

to

circuit. Here,

is then

pin

key

applied to

pin

9. The out-

jack

selector switch

by the IN-

applied to the

amplifiedsignal

and into

and

applied to the

The key signals

uses this data

the 16-bit serial

5 of PD6006.

a clock

pulse

isactivated.)
pin

edge of the

head is

Q1701

response

is

and

pin

15

it

of the

first

is

(NJM-

the

passed

IC601
ampli-

and IC

as

pulse

is

trans-

3 of the

a STB

(strobe) pulse

then starts transmitting

various

was activated.

circuit operations occurring

activated. Operations
FWD

wise

path

circuik only

switch is changed.

1. STOP Mode Key
Mechanism

will cause
tuming
thus be

Motor

be in
Signal

all ON. This causes
phone

Q309
a

Q302
circuit, and extinguishing the

applied

2.
Mechanism

and R.
This

Motor

a middle
to start turning.

P06006

output

The following

direction

specified, the

The DOLBY

diagram

The 16-bit

SOL L and R

placed

Pin 4

and 5 will be low.

a STOP

Path and other circuits

When

ground potential.

pin

amp

is tumed ON,

tums

to all circuits in a STOP status.

PLAY Mode Key ON

Pin

7 and 8 of PM3001

(Refer

places

Pin 4

is applied

pins

(Refer

sections

of travel.

pin

MUTE

(Fig.

1-1) tums

when the

serial data transmission from PD6006

pin

7 and 8 of PM3001

in a

STOP status.

status.

is high,

9

to be muted. If

OFF, stopping

to

the

the mechanism in the

goes

to a low level,

(M)

level, causing

3 35)S

Fig. 1-1 PD6006

to

control

in accordance

Fig.

to

will describe the various

will be described for

nos.

circuit shown in

position

-Power

ON

OFF.

and the

Q621, Q311,

LINE

OUTPUT and the

placing
When

pins

go

timing chart in Fig. 1-5.)

Data output

pin

1, and PM3001

signals from its

with which

1-3.)

when a mode key is

(Except

will be for PM3001.)

Q313

The mechanism

pin

the REC AMP

REC

low,

while

RM R

where other-

ON

to mute

of the Dolby

switch

11 also

12 and 13

the bias oscillator

ON

to

reel

motor will

and

Q1603

goes

IND.

activating SOL

PLAY

pin

5 is

(reel-motor

t--"=

key

the signal

go

high,

will

head-

high,

input at

go

low,

Muting is

mode.

held

the

all

are

L

at

R)

\ODE

PINNO\

35

34 L H

\{o.

)IN

NO\

33

32 L

rEc

H

H

)LAY

L

D

L H
H

CFF

H
H

H

PD

(

cPu

6006

)

+sv

PULL-UP

HALF

SW

MS

READER

SENSING

M.

REPEAT

I/B/S

T-

PLAY

T-

REC

MODE

I

MODE

tr M/T

RESISTOR

-STOP

M

DATA

STB

SKI

MS

CIRCUT

PA301

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SUPPLY

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FF

REC

RESEI

BIAS M

R

MUSIC

BLANK

SEARCH

.J_

INOEXSCAN

MS

/SKIP

REPEAT

PREVENTION

FWD

REV

-rEEC

REC

-r-

PLAY

4

+PAUSE

. FF

REW

_L

-gSTOP

.J-DIR

MUTE

F-R

SW 8/S

REC

SENSOR

PAUSE

FF

REW

STOP SKIP INO

DIRECTION

AUTO

BLE

PAUSE

IND

REC MUTE

tN0

MS

MUTE

M

IND

/R

T

IND

/S

IND

A/S

G N D

REC

t_

HEAO

ffi

vl

L

HEAD

REc

Fig. 1-2

Control system block

diagram

MS

CIRCUT

REEL

MOTOR

CIRCUIT

Path

Signal

When
turn
LINE
pin
constant

PLAY

same

and other circuits

pin 9 goes

OFF, enabling

OUTPUT

goes

16

of the

mode. Pins

state as STOP key

and at

high,

blank

low,

Q621,

sound

the

q324

tums

detector circuit

pin

11,

12

ON.

Q311

to

be output

headphone

ON and

pin

and

and
jack.

enters

13

are in

Q1603

from

When

the time

the
the

PM3OO1

CLOCK

(EXPANSION

AUTO

crRcu rr

CIRCU IT

I

RESET

J lauroRESETl I lsoL.

Gto*'

FF

REC

BIAS MUTE

IC)

r- |

MUTE

I

L

^

il-:l,

{

SIGNAL

CAPSTAN

L

---

MOTOR

REAL TIME
TAPE

RUN

PATH

PA2009

PA201c.

MOTOR

CIRCUIT

NE

,,.o.

|

cr-eR

I

&

MECHANISM

COUNTER
CIRCUTT

HEAD
PHONES

AMP

DOLBY

MUTE

I

oNLY

I

PATH

LI

NE

OUTPUT

HEADPHONES

rI

R

chl

i7

__J

I

3. FF Mode

Key

Mechanism

Pin
SOL L

nism in

goes

7

OFF and

a PAUSE

Motor

goes

Pin
L

in

Signal

Same

4.

REW

4

a

Path

low

STOP

and other

as in

the

Mode Key

Mechanism

Pin

SOL
nism

goes

7

L

OFF and

in a PAUSE

Motor

Pin

RM L
Signal Path

Same

goes

4

ON and

and other

as in

the

5. REC/PLAY
Mechanism

Same

as PLAY

Motor

Same

Signal

When
turned
and

the headphone
muting
signal
and 13
bias

erase head
REC IND

PAUSE

6.

PLAY

as

Path

and

other circuits

pin

9

OFF enabling

is lifted

to be recorded

go

high,

oscillator

and bias

(LED)

Mode

Mechanism

Pin

7

and

8 both

and

placing

OFF
Motor

Same

as

STOP

ON

high

SOL

status.

and

status

circuits

STOP

high

SOL

status.

high

places

circuits

STOP

Mode

Mode

Mode

is low,

from

Q302

and

is

also

Key

the

status.

pin

and

R ON,

pin

5

and causing

status.

ON

pin

and

R ON,

pin 5 goes

and

RM R in

status.

Key

ON

Key

Key

Q621,

output from

jack.

If

the

REC AI\4P allowing

on the tape.

is

turned

applying

to

the recording

illuminated.

(in

ON

go

high,

mechanism

goes

8

low.

placing

goes

high,

RM

goes

8

low.

placing

low.

a

STOp

status.

ON.

ON.

Q311,

and

LINE

pin

11

also

When

ON activating

erase

current

STOP status)

turning

SOL L and

in a

STOp

This

turns

the

mecha-

placing

to turn.

R

This

turns

the

mecha-

This

turns

Q1603

OUTPUT
goes

pins

to the

head.

status.

RM

are

low,

the

12

the

The

R

Path

Signal

Same

illuminated

7. PAUSE

and

other circuits

as

STOP

however.)

Mode Key

Mechanism

Pin

SOL L

goes

7

OFF and

high,

nism in a PAUSE
Motor

Same

as

STOP status.

Signal Path

Same

nated

as

STOP

however.)

8. REC/PLAY
Mechanism

7

goes

high,

and

Pin
SOL L OFF
nism in a PAUSE

Motor

Same as

STOP status.

status.

ON

and

SOL

status.

status.

PAUSE

and

SOL

status.

(The

(in

PLAY

pin 8 goes

ON,

placing

R

(PAUSE

Mode Key

8

goes

placing

pin

R ON,

PAUSE

status)

low.

This

the

LED

ON

low.

This turns

the mecha-

LED

turns

mecha-

is illumi-

is

Path

Signal

When

all

ON. This

phone
Q309

ground

a
turns
Pin

pin

amp

is tumed

OFF,

goes

13

and other

to be

potential.

nate.

9. Direction
Mechanism

Pin

goes
27[msec,

goes
STOP to

goes

7

high. This

and

through

REV-STOP.

Motor

Same

as

STOP

Signal Path

Same as

and

STOP

circuits

9 is high,

causes

Q621,

LINE

muted. If

placing

ON,

When

stopping

high,

Key

low for

causes

since

the

causing

(in

ON

a

SOL

SOL R is

a direction

status.

other circuits

status.

Q311

OUTPUT

pin

the

pins

12

bias

the

REC

STOP

275msec

L to turn

OFF,

operation

and

and the head-

11 also

REC

AMP input

goes

oscillator

IND

status)

interval,

ON for

the

mechanism

from

Q1608

goes

high,

low,

QB02

circuit.

to illumi

pin

and

FWD-

are

at

8

only

Pin

No.

FUNCIION

RM.

5

RM.

HEAD SW

7

SOL.

I

SOL.

9

P B. IVUTE n

to

LINE MUTE

II REC

I2

t?

t4

t6 PLAY

PD

t4 PAUSE

MUTE

BIAS

REC

REW

IND

oo6

STO P

'

FWD

IREV

L L

R

L d

R

IND L

IND L,ora,

IND

-

L

-

t

H

L

L

L

H

(

(or'

t

uooE

(OFF)

(oFF)

(oN

(OFF)

(or'

IOFF)

rorr)

(OFF

OFF)

(oN)

(oN)

FWD

HL

LH

)

)

FF

V

FwD I REV

IRE

L n

n

L

HL

L]H

H H

n H

n

L

L

L

H

L

n

REW

FWO REV

L

L

H

L

L

n

L

L

H H

PLAY

L

M

M

L f,

L

L

L

L

H

L

L

L

L

H H

REC,/PLAY

FWO

REV

L IM

ML

L

L r

L

L

L

n

L

L

n

STO P

PAUS€

FWD I REV

L

L

L

n

H

f, H

n

L

L

L

L

L

L

PLAY

FwD I REV

L

L

L

Hlt-

LH

H H

H H

L

L H

L

L

L

L

REC /PLAY

PAUSE

FWO I REV

L

H

HL

L

IH

L

L

L

L

L

L

Fig.

1-3

PM3001

Output

state by mode

5

Pin

No.

1
2 Xtal

3

4 M.STOP
5 DATA
6
7
I
I

10

11 M/l

12 B/S
13 AUTO

14

15

16 MS MUTE
17 M/R IND

18 r/s
19 B/S IND

20 SKIP IND

21 GND

Symbol

E

xtal

RESET

CLOCK

STB

SKIP

BLE
PAUSE
REC

MUTE

IND

rND

OUT

OUT

OUT

OUT
OUT MUSIC
OUT BLANK

OUT AUTO

IND

OUT
OUT REC

OUT
OUT MUSIC

OUT

OUT BLANK
OUT

22 DIRECTION

23

STOP

24 REW

FF

25

PAUSE

26

PLAY

27

REC

2A

29 REC

30

31 F-R

32 MODE
33 MODE

MUT

REC

Sensor IN REC

SW

I
II

34 T.REC
35 T.PLAY

36

r/B/s

37 M.REPEAT
38 SENSING IN

LEADEF

39

40

MS

HALF

41

42

SW IN

VDD

vo

Used by internal

External
IN
IN Memory

IN
IN
IN REW
IN

IN

IN
IN
IN REC MUTE

IN FWD/REV
IN
IN
IN
IN
IN
IN

IN Tape

IN

CPU reset

DATA output

NC

CLOCK output

NC

STB output
SKIP key

PAUSE

Ms
during

INDEX

SKIP indicator

GND
DIR

STOP key

FF key
Pause
PLAY

REC/PLAY

Mode

Timer REC
Timer

INDEX

MUSIC REPEAT
Sensing

Blank

selection; H level

Cassette loading

+5V

circuit

input

STOP input

scan output

REPEAT,

SEARCH key

BLE

indicator

MUTE

MUTE output, PA301o

blank

REPEAT

SCAN

SEARCH

(directionl

input

key input

input

key

input

key

sensor

selector

PLAY

SCAN,

pulse

leader

signal input

power

Description

quartz

oscillator

terminal f

(effective

PM3001

to

to

PM30O1

to

start

output

output

indicator

detector

indicator

indicator

output

key

input

key

input

key

input

switch input

sensor

switch

switch input

switch input Timer

switch input

BLANK

key

input

pulse

detector

(H

all other timesl

switch

source

:

3.58MHz

low,

normatly high)

(effective

tow)

orrr

--t

SCAN key

scan

output

(effective

output

MS

operation

output

output

(effective

(enabled

input

SEARCH,

inpur

PA2010

input

level

between

input

.'^^ulilAlAlA

STB

(effective

signal

(effective

low)

(FWD:

(from

(Loaded:

PM3001

INDEX

indicator.output

input

(from

l1___1J-

1234

T-'l r-t rr I

UUU

scan output

[

low)

low)

MUTE

(effective

lowl

(effective

tow,

disabled

L;

REV: H)

key

SKIP

pin)

pin

2,

selection in

L ; Unloaded:

rl_

ffi;;,pffi----

output

lowl

lowl

input

PA3010)

Pin

2 - GND

g

- -

- - --_Sf;Lr_

J--L

-L-

---1__J-- --t_r

(low

level

high)

J-l_l-Ll-L

PLAY,

FF,

REW;

H)

while

n

L level

r[_

_J__-L

-Lr

l=]-fr"

reel motor

Reelturnins

*Tape

leader

during

Serial

output

PM3001

KEY

SCAN

output

I ndicator

output

turning

Indicator

output

Mode

key

input

Mechanism

input

SW

Mode

selector

input

SW

mode

input

Key

matrix

input

detected

SW

to

Applicable

Model

CT-gR

o

o

o

o

X
X X

o

\J

o

o o

o
o

CT€R

o
o

o

o
o

o

X

o
o

o
o

o

o

o

o
o

Fig.

1-4

PD6006

Pin

description

Timing

PIN

NO.

,,N

chart

1

FWD

POWER

STOP

ON

Its

STOP REW

STOP

P

LAY

STO P

PLAY
PAUSE

/

STOP

4 RM

R tvl

6

HEAD

7

SOL, L

I )vL. x

I
Zu

gF

*s

g6

9 P

lo

tl

PAUSE
DIR
STOP

B MUTE

LINE MUTE

REC MUTE

R

SW

Tr

L

=

H

H

STOP

H

H

H

Tt

tl

-.,r

l*

PAUSE

,

I

L

L

L

L

L

L

f

Tl

i*M

t2

1F-

*l

PLAY

l*

f2

'l-1

TI

Tr

T2

T6

'Ati

Tll

tl I

t,t I
'lll

-

f

-l

-

_l_

t2

t3

BIAS

REC

SW

L

L

ft:425mS

T2:275mS T!:275mS

Fig.

T4:225mS

T5:tASmS

T6:42SmS T7:42SmS

1-5 Timing chart of PM3001,

Ts:325mS

Te:ZgmS Tto:l25mS

1

7