Pioneer Spec-2 Service Manual

STEREO POWER

AMPLIFIER

SPEGI?,

KCU

(DrrroNEER'

CONTENTS

1.

SPEC|F|CAT|ONS

2.

FRONT

3.

CoNNECTION

4.

CIRCUIT

4.1

4.2

4.3

4.4 Surge Current BLOCK

5.

ADJUSTING

6.

6.1

6.2 Current

6.3 D|SASSEMBLY

7. PARTS LOCATTONS

8.

9.

EXPLODED

PANEL FACILITIES

DESCRIPTION Power Peak Level Meter Circuit Protection Circuit ,

ldle Current Adiustment

Meter Amplifier

Amplifier

DIAGRAM ...

PROCEDURES

VIEWS

.....

DIAGRAM

Suppressor

Limiter

Sensitivity

Adjustment

Circuit .

Adiustment

... ... ..

.. .......

'........

......

....'...

. .

......

.. . 16

...

........

3 4

5

6 7 8

10

11

13

. . 14

15

20

23

10.

SCHEMATIC

PARTS LIST

10.1 Schematic Power

10.2

10.3 Power Amplifier Assembly

Meter Amplifier Assembly

10.4

PACKING

11. PARTSLISTOFEXPLODEDVIEWS.

12.

DIAGRAMS,

Diagram

Supply

Circuit Assembly

P.C. BOARD

and Miscellaneous

PATTERNS AND

Parts ..

(AWR-093)

(AWH-045)

(AWM-0811

.......

'... 33

....

-. '. 37

..

' ' 42

. .

......

.........48

... 47

30

1.

SPECIFICAT|ONS

Semiconductors

Transistors

Diodes ..

...........55

...........75

Power Amplifier

Circuitry Continuous

from (Both

Total Harmonic Distortion

(Continuous (125 (1

watt

.

20

Hertz

channels

per

watts

per

channel

Push-pull drive, Triple

Power

rated

channel

.......

Outout

to 20,000

driven)

power

. .

at20

output)

power

poweroutput,8

lntermodulation Distortion (Continuous

(125 (1

watt Frequency Response Input

rated'power

per

watts

per

channel

output) ......... - O."lo/o

power

output,

. 5 Hertz to 80,000 HertzlldB

(Sensitivity/lmpedance)

Output

Speaker.. Damping Hum

and

(20

Factor

(lHF,

Noise

Hertz to 20,000 Hertz,

short-circuited,

Miscellaneous Power Requirements .

Power

Consumotion . . . . . . .,.. 500watts

Dimensions

Weight:

Without Package

......480(W) x186.5(H) x445(D) mm

.

Cascaded differential Amplifier,

push-pull,

Hertz

. . . . 250

Hertz

output,8

to 20.000 Hertz

direct coupled OCL.

per

watts

channel

ohms) . ........O.O5%

ohms) . . . . . . .

output, S ohms) ..

8 ohms)

.

..

. . . .O.O5%

. . . . . . 2Vl50k ohms

.

4ohmstoSohms

S ohms) ...,... 50

A network) . . . . . .

. AC 120V 60

19-5/16 x 7 x13-3116in

-....0.05%

Furnished Parts

Connection Cord with Pin Plugs Operating lnstuctions

(g

ohms)

o.1%

, . . . 0.Q5o/o

.110d8

Hertz

24.3kg;

54lb

EiPEC.E

NOTE:

Specificdtiotrt and without notice

the design subject

due to improuements.

possible

to

mod,fication

2. FRONT PANEL

FACILITIES

PEAK LEVEL

When

speaker nected, these in Watts.

NOTE: Speoher syotem impedance uaries

To

obtoin o

remoue loods ocro4i the SPEAKERS

METERS

systems of 8O nominal impedance

provide

preciae

Spedher con\ectiotrs

direct readout

medsurcment

of the output

occording

of the output

connect

ond

termindls-

are con-

power

to

frequency.

poue\

8a dumtuy

PROTECTION INDICATOR

lamp lights when

The

lf the lamp stays POWER

"Protection correcting the source of difficulty, if the lamp still fails to Center,

switch

Circuit

extinguish, contact a Pioneer

on during operation,

and check as described

protection

the

Operation".

circuit functions.

turn off the

in the section

After identifying and

Authorized Service

POWER

S'et to ON obtained until This effect not indicate

METER

SWI CH

ZERO POINT

to energize

the PRoTEcTIoN

is due to

malfunction.

the SPEC-2. Output will

the internal muting

ADJ USTMENT

indicator lamp

circuit and does

not be

Soes

out.

INPUT

Adjust LEFT output the SPEC-2 INPUT correspond to 2V of rotation, and d Normally

.

LEVEL CONTROLS

and RIGHT controls according

(voltage)

level

MAX

at

set these controls

lf

the minimum output voltage

amplifier

(2V). specifications will

of amplifier

does not reach 2V.

In

this case the effective output

the specified

output voltage

output can

(LEFT

of the

(L

at MIN

not be obtained

pre-amplifier

jacks.

& R)

(fully

clockwise), 4V at center

(fully

(2V).

MAX

to

of the

set the controls to MAX

attained

be

of 1V).

& RIGHT)

to the

connected to

Control

counter-ciockwise)

(for

positions

a

pre-

1/4

pre-

employed

indicated in the

example

with

sPEC-e

3.

CONNECTION

STEREO

TURNTABLE

DIAGRAM

-i

;

. , 1 I , r ,

rl

tO

C

STEREO

PRE-AMPLIFIER

'\..,,

i

O

q1

(e.s.

o

Pioneer

TAPE DECK

SPEC-1)

SPEAKERS S€t to ance

ployed to

turn otf

chenging

For

changing IMPEDANCE TECTION lamp is

not obtained from systems. This is du6 in muting

IMPEDANCE

malch

of the

spoaker

with

the SPEC-2.

this switch

about

6 to 12 seconds

the

circuit,

the nominal imDed-

the

position

swirch the PRO-

lights

syst€ms

po!!€r

setting.

o{

and sound

the speaksr

to

the built-

swilch

em-

Be sure

before

6tter

the

RIGHT

CHANNEL

SPEAKER

LEFT CHANNEL

SYSTEMS

4.

CIRCUIT

DESCRIPTION

4.1 POWER The

SPEC-2 cascoded drive, all The circuit form

applied applied nected forming emitter circuit of impedance achieved.

Q3

phase. current mirror the thus a The Current to since

of. current R1 through R2 equivalent

Q8.

and darlington

stages

the

in common base circuits

the following common

and

The

phase

become signals

pre-driver

cunent

that flowing

R1

D2

and

AMPLIFIER

high

is

a

differential

direct coupled

diagram is shown

differntial

to

a

Q4

flowing

and

+BL

D2

and

Q1

base.

Q2

cascode

(Q1

is low

Qb

is

function.

is equal

to

and stable

outputs

output

circuit formed

again

mirror circuit is

through R2

through Rl

R2

are

base-emitter

Q8

reaching

and

Q8

having

power

amplifier

triple

(OCL).

amplifier. The input

NFB

These

amplifier. Since

&

Q2)

drive

inverted.

of

the

equal,

point A (in

to

that

base-emitter. This Q5

design,

first stage,

push-pull

Fig.

in

from

two transistors

load

base circuit

amplification can be

Q5

via

Q7

by

Q6

same

and

and the characteristics

are reaching output directly

2.

the output stage

with

the common

becomes the input

and

Q6

is

applied

D2

and

phase

depicted

becomes

Q8

In

D2.

also Fig.

the

employing

push-pull

circuit

Q1

Q3

stage,

in opposite

Q8

and

other words,

1) through

same

and

signal are con-

and

to the

where

Q8,

outputs

perform

Fig.

in

equal

equal,

point

becomes

driving

with

Q2

Q4,

load

1.

the

By

adopting

muting relay

a

is

switched

are stops.

cause them

noise Q13

the stage transistors This current sistor,

good

The reversed

and

power

is

parallel

linearity

RLb is OFF

to

muting

Q14

transistors

high

a

for

coupling

(Ic)

to

plus

selection of an

current

this

OFF in succession,

phases

cancel

relay switching

in the following

by direct coupling.

output

each channel

be employed through

high amplification

and

mirror circuit,

is

Q8

of

each

other,

design

coupled

permits

operating

cut off,

and operation

and

Q8

reducing

noise.

driver

with

three

comparatively

(hfe).

+Bl

ll:t2

-

llrirel

when

Q10 - Q20

outputs

Q6

stage drive

in

each

point

pop

The final

power

parallel.

large tran-

with

tu

€

Fig.

1 Current

Mirror

Circuit

IIIPUTH

Fig.

Power

2

Amplifier

Circuit

Current The

of transistors, shorting, produced to limit OFF, in nent increases. the

Q9

limiting Q13

VR2 ing value, compensation. ing

current

-

Q9

Limiter

qLz.

Circuit

limiter

If

an overcurrent

due

to low load

circuit, shown in

this circuit utilizes

in the

power

the input voltage.

but if for

power

the

of

the

some rea.son

transistors,

power

This voltage bases of and

Ql1

the

and

Q14.

and VR3 in

and

Q9

make

signal voltages

this circuit set the current limit-

while TH1

RLG is

the current limiting value

Fig.

2,

consists

power

the

4S2)

or load

resistance

occurs

drop

(less

transistor

-

Q9

an overcurrent

voltage

the

flows in

than

voltage

the

emitter

are normally

Q12

drop compo-

transistor emitter resistance

is

divided

switching

Q11,

and

Q10

applied

and TH2

are

a selector switch for

4O

at

used

and

them

conductive,

Q12

to the basis of

for

temperature

load.

to bias

ON.

chang-

portion

A compressed

of

by which utilizes of

diodes. Figs.

principle

pressed suitable which struction. constant

and input-output

signal

length

employs

Holding

of C1 The holding voltage-current into

a current value afterwards circuit The

current

.meter

passes

and drives

of

the

for

operation.

pov/er

the

amplifier

the logarithmic

exponential

the

4

and 5 illustrate

is

then rectified

of

time by simple

a

the

diode

time is

and R1.

circuit voltage

converter,

and

through

the meter.

resultant

positive

circuit applies

and negative sides

SPEC-p

output signal

compression

function

the operating

response.

and retained

peak

holding

and capacitor

determined

is

then applied

where it is

amplified. The

the current resultant

circuit,

properties

The

circuit,

by

ttre time

to the

converted

current

the larger

to the

comfor

con-

is

a

4.2 PEAK Logarithmic

provide without With

a broad indicating

the

respect logarithmic meter

indication

As

shown in Fig.

positive

and negative sides. Each logarithmic voltage there both described

to current

is a cunent resultant

sides. The

here.

LEVEL METER

indication

is required in order

range in a

need for

to

compression

an

8O

range

load,

is

in the range

3,

the circuit

compression,

peak

converter circuits.

positive

PostTtvt

stDE logarithmic

comp

side circuit operation is

ion

ress

CIRCUIT

single meter,

selection by the

user.

approximately 50dB

performed

to

allow

of 0.01 - 500W.

is

divided into

side

consists

value

holding and

In

addition

circuits, common to

current

Yoltage

rter

Conv e

Peak

r alue

ho ld ing

to

of

Fig.

4 Equivalent

o

E

I\ f

o e

I

EL

+

Inprt voltagc(lC)

Circuit of the Logarithmic Compression

e 4

=

e

€

o E

Fig.

lC input

voltage

5 Input-output Response

It0lltvt

st0t

Fig. 3 Peak

Level Meter

Circuit

-

Positive

--'

llegatiYe

peak

current

peal

current

7

PROTECTION

4.3 The main

protect the event

purpose

equipment

the

of

malfunction, incorrect faulty connections, The block tions

in

is

reference to

Relay and

-

q27

while reverse the cut by the flows through and voltage

Potential Q30.

off, tuming

protection

RL2

and

4Q, RL4, RL6 and

at Because of amplifier

predriver

diagram of

Fig.

is shown

in

the

Lamp Drivers

form

Q30

Q31

the

drives bias is applied to off state.

DC

balance

When

R1.

it switches

be

to

at

With

Q29

lamp.

(when

ON. This causes

applied

point

OFF, current to

(lamp

Q31

Q30

impedance switch

RL4

off, output

becomes open, and the

are stopped operation

RL5.

CIRCUIT

of the

protection

give

and

or other causes.

protection

the

The following description

6.

dia$am.

relay drive

lamp.

the

circuit

In

Q27,

abnormality

an

or

temperature

potential

base

Q27

to

Q28,

B

drops, turning

drive)

ON

cuts off the

RL3).

circuit of the

circuit is

to

an indication in

operation,

circuit func-

(see

Fig.

7).

normal operation,

detected

is

current

it in

maintaining

detector,

falls rapidly

forward bias

turning

off

RL5 is

relay

lighting

and

current to

is

at

Q28

Q29

8Q;

ON.

and

cut the

RL4

when

power

stages beyond the

completely

by

RLg

RL2, former

selected and

is control

not directly

thus

and

secondary

circuit

tion.

Zener tials starting

Power This circuit

the

diodes

of

Q29

points

Switch

power

and

also includes a

switch is set to determined by base circuits. Immediately

and

Q27

switched

and passes

rise

time C1 and (zener

and current to

Q30.

In

the

B exceeds

current

and applied

after the

Q28

through

is determined

R8.

diode)

flows in the manner,

same

D2 zener

flows

to the

RL6

are

when the

taps

determining

in the

power

related to

D2

prevent

ON

R8

DB

and

and the

Q30,

misoperation.

Muting

and

C1 in the

power

reverse biased by

are

OFF.

Point

R8 and

rises as

by the

When

zener

the

voltage,

when the

voltage,

in RL5.

power

amplifier.

changing

for

impedance

value of

the

amplifier.

the

fix

the

difference

delaying

ON. The

switch

potential

B

potential

Q30

circuit

relay

potential

Q29

Correct

the

switch

current

the

They

protectiorr

operating

poten-

in

function

delay time

and

Q29

is

turned

-B1

and

from'+B3

Cl charges.

constant

time

exceeds

is switched

connected

at

is switched

voltage

is thus

trans-

are

func-

their

when

is

Q30 ON,

-B2,

The

of

D3

ON

point

ON

Fig.

6 Block

Diagram of the

Protection

Circuit

SPEG.El

Power Since

flows to potential.

-B2 smaller

through Dl Q28

tuming

lmpedance

When changed is reducing ON, switched

Switch +B3

OFF

normally

-B.2,

Q28

When the

immediately

than

+83.

and is

ON. Point B potential

and

Q27

Q30

Selector Muting

the impedance

from 8Sl

introduced into

-B2

voltage.

C1

to be discharged,

OFF.

Muting

passes

from

base is maintained

power

switch is

ceases, since its

Consequently,

applied

to

Q28

then falls rapidly,

OFF.

selector

4Sl, uncharged

to

-

82

the

This

circuit,

causes

and

Q29

R7

to

at cut

tumed OFF,

time

constant

+83

base, tuming

switch

capacitor

temporarily

to switch

Q28

&

Q30

R6

passes

(S1)

to

and

off

is

C2

be

Although continue

switches OFF

Q28

in

the

OFF

condition

again,

Q29

for several seconds

while C1 is charging.

Temperature

The temperature detector cient thermistors sensitive elements

Detector

employs

(posistors).

possessing a positive

positive

These are temperature

temperature

response, rapidly increasing in resistance

(see

certain The power the their

potential so that the

temperature

posistors (TH3

transistor.

temperature to the

resistance rapidly increases,

point

at

potential

is exceeded

TH4)

&

If

some abnormality

are mounted

posistor

C. This allows

point

at

Figs.

operating

reducing the

DB

to conduct,

D drops and

switches ON.

and

Q30

coeffi-

when a

8 &

9).

on the

increa.ses

point,

Q27

q

4

o

,2

o

4

A

-Tem0erature

Posistor-temperature

Fig. 8

Fig.

9 Temperature Detector Circuit

point

("

t

Response

DC

Balance

and

Q25 as shown

Detector

make up a differential amplifier,

Q26

Fig.

in

The inputs

10. transistors are connected to the power

balance of

amplifier.

the difference arises in signal, unbalancing When one lower

than

of

Q27

is dissipated through and relay

and

If

for

power

the

q25

the collector

potential,

base

D1 or

lamp

drives

-----

r-

some

is

upset,

stage differential and

Q26

potentials

this base

D2,

operate.

collector

q27

Poror

amplilicr

i

r--------J

itcll

I I

I

L- --:E---..i

Fig.

10 DC Balance Detector Circuit

(bases)

of

these

left and right

reason

the

potential

a

amplifier input

currents. becomes

potential

switches

DC

ON,

4.4 SURGE A

toroidal

SPEG2,

a large low intemal

CURRENT SUPPRESSOR

core

which while

handling capacity, also

resistance. four 15,000pF electrolytic power switch

The

protective

The power

supply Two surge

supply, surge

operation

power

supply can

measures

main sources

transformer

electrolytic

suppressor circuits are

SPEC-2, one each power shown

Power

by

primary

transformer

Fig.

in

transformer

relay surge

the

side.

11.

When

ON, the current

C1,

charges

relay

therefore

drive coil

OFF. The transformer

R1

through

completely

drive coil switching

+83

during this

charged,

The surge

secondary side of

former is designed

electrolytic

Relay

d riv ors

rent. turned

lanp

and

OFF eration. Consequently, passes ally charging tors circuit. RL2 when gving

+Bl

+ t lectrolytic

t

ito

catac

By current is 40 A.

power

transformer

possessing

is used in

compactness and

exhibits extremely

In

combination

capacitors forming the

current accompanying

can reach a

therefore

maximum of 3004.

damaged

be

are taken.

surge current

of

excitation current

capacitor

charging

generation

and

current.

employed in the

in

the

circuits.

primary

These circuits are

and

secondary

excitation current is handled

suppressor circuit

power

the

passes

through

it does

immediately, and

excitation

current

it ON, and

switch is turned

R2 &

not

flow through the

RLl

current flows

interval.

flows

R1 is

shorted.

After. C1

in the

suppressor circuit in

power

the

handle

to

capacitor charging cur-

When

ON,

due

to

power

the

RL2 and RLB remain

protection

circuit op-

the current

through

through a bridge

charging has

the normal

employing

R3

and R4,

electrolytic

the

type

RLB is

or

switched ON

been completed,

operating mode.

these circuits, surge

limited

to approximately

CIRCUITS

the

with the

power

unless

are

power

at the

D1

and

remains

is

RL1

the

trans-

the

switch is

gradu-

capaci-

rectifier

10

Fig.

11

Surge Current

tlectrolytic capacitor

-Bl

Suppressor Circuit

BLOCK

5.

DIAGRAM

LEFT

TNPUT

etl

u*,il-

Li

I I

POWER

AMPLIFIER

_

--

--_\

Qlr

I

RIGHT INPUT

@-9_l

u*t

: l---

f*l

'l

ll

Irl

tl

LE--

RIGHT CHANNEL

powER

PROTECTION

CIRCUIT

(

AMPLTFTER

same

as

Lelt,

t

-----r

cirannel,,)

PROTECTIOI

LANP

I

44

t-

METER

ANPLIFIER

PEAK

METE

OUTPUT

LEVEL

R

L

EFT

sPEC-e

-

t--

aRrcHT

(Sarne

|

\

CHANNEL METER

I

AllPLtFtER

as Left, channeL)

!

TPUT

@+

6\-

+

LEVEL

PEAK

METER

1

RIGH

AC LINE

SWITCHES

Sr : P0WER Sz . SPEAKER

POTENTIOMETERS

VRr VR2: RIGHT

RELAYS

RL1: RL2, RLs

RLn:

RL5: Rh' CURRENT LIM{TER

:

0N*_0EF

I|'lPEDANCE

8.0* :

:

LEFT

LEVEL C0NTR0L

LEVEL C0I{TR0L

; PRIMARY

CURRENT

:

SURGE CONTROL AND VOLTAGE SELECTOR

P0WER CUT_ OFF

MUTING

SENSITIVITY CONTROL

SURGE

CONTROL

SECSNDARY

CURRENT

SUPPLY

RELAY

4Q,

t<

ADJUSTING PROCEDURES

6.

Since

the

right channels

and assembly, channels.

same configuration

of

the following

SPEC-2

the

adjustments

used for both

is

power

apply to

Power

amplifier

left

amplifier

both

assembly

IDLE

6.1

1)

Connect as

2)

Set LEFT trols counter-clockwise).

Set

3)

minutes adjust

30mV on the

After

4) readjust

voltmeter.

CURRENT

on

the

POWER

the

VRl for 30mV

shown in

LEVEL

front

switch to

VR1

voltmeter.

po\Mer

has

ADJUSTMENT

Fig. 12. and panel

to

been

RIGHT

to

ON.

give

ON for 30

LEVEL con-

minimum

After I or

indication of

an

indication on the

(fully

2

minutes,

13

Fig. 12

Connection

Diagram

for

ldle

Current

Adjustment

6.2 CURRENT ADJUSTMENT

Note: The high dummy 200W 8S},

output

load of 4O

dummy

100W

loads in

load is

LIMITER

power

of the

and more

not available,

parallel.

SENSITIVITY

SPEC-2

requires

than 200W.

connect

If

two

Connect as shown

1)

Set SPEC-2 impedance selector switch to

2)

(even

though a

a a

VR2

While

3)

the In

the same manner, adjust VR3

torted

voltmeter

the

just

to

waveform.

point

in Fig. 14.

4O

dummy

indicated

distorted

the lower

load is used).

point

the

half

with

30V/(40

upper half of

to

28.3V/(44).

adjust

),

just

8O

dis-

ilPur

|

/

la

AF

Fig.

13

signal

The Position

generator

of VR2

Voltmeter

and VR3

VR3

Osilloscope

ooo

Waveform

Fig.

14

Connection

Diagram for

Current Limiter

Sensitivity

Adjustment

6.3

1)

2)

3)

METER

Connect

Adjust

44.7V At is for on

as shown

input

on

this time,

right channel) for

LEVEL

the

AMPLI FIER

Fig.

in

level

to

voltmeter.

the

adjust VR1

meter.

ADJUSTMENT

16.

give

an indication

(left

channel;

(250W)

OdB

indication

Meter

SPEG.E!

of

VR2

amplifier assembly

Fis. 15

SPEC-2

NPUT

I

r

IA

R

Position of

The

VR2

VR 1

VR2

and

RIGHT

AF.

VRl

Voltmeter

.----.

S

Fig.

a

att\

'J-'

16

Connection Diagram for Meter

Amplifier Adjustment

15

7. DISASSEMBLY

1. Removing the Top Cover Remove cover.

L2 screws

t],:.e

(A)

to

detach

the top

2. Removing the Bottom Remove

13 screws

the

plate.

Plate

(B)

to

(A)

E

@

,a/-*rutez&tt"-..^

""*€:

"€a*...

i

detach the

(A)

n

bottom

?soo

ToP

(A)

9

cover

(A)

Y

*""'-€(A,

.- -

A)

I

g

-

\

-.

""",:'i,*u*

sPEC-e

3. Removing the (1)

Remove

out.

(2)

Remove

LEVEL shaft

(3)

Remove main body. removal.

the

Front

all

the

panel

Front Panel

control

nuts

4 screws

The front

knobs

LEFT LEVEL

and washers.

(C)

by

each

on

panel

pulling

and

is ready for

them

RIGHT

side of the

'--=-

-..----

)

,/.

7

-'-

.

Washer

j

@(c)

Main

body

17

4. Removing the

(1)

Remove

the top cover, bottom

panel.

(2)

Unscrew

the 4 screws

stay.

(3)

Unscrew printed This moved, length

the 4 screws

circuit

allows

though the

lts

of

Meter Amplifier

(D).

(E)

board on

printed

the

peak

circuit board

distance

lead wire.

Assembly

plate

and

Remove

the

which mount

level

meter.

is limited by

front

panel

the

be

to

the

Meter amplif ier assembly

Panel

stay

5.

Removing

(1)

Remove

(2)

Unscrew power

(3)

Unscrew

printed

Power Amplifier Assembly

the

top cover

the 4 screws

and bottom

(F)

which mount

plate.

amplifier assembly on the rear

the 4 screws

circuit board

(G)

on the

which mount the

heat

sink.

SFEC.A

the

panel.

Printed

circuit board

Heat sink

19

PARTS

8.

1.

Top

View

LOCATIONS

Power

amplifier

assembly {RIGHT CHANNEL)

AWH-045

Power

supply

circuit

assembly

AWR.093

Electrolytic

r 5,00&F

ACH-052

capacitor

100v

Power

amplitier

assembly (LEFT

AWH-045

CHANNEL}

Oiode KBH2504

Power

transformer

ArT-245

Meter amplif ier assembly AWM.081

siPEc-e

2. Front Panel

Front

3.

View

with Panel

Handle ANK,O84

Knob (POWER)

AAD-109

Removed

Front panel

ANB,358

assembly

'm

K nob (LEFT

AAB,097

Knob (R

IGHT

AAB-097

LEVEL)

8:

&E

LEVE

L)

Hand

le

ANK.O84

(bar

Lamp 8V 0.3A

AE

L-058

switch

Lever (POWER)

ASK.OSO

type)

Peak level meter

(LE

FT CHANNEL)

AAW,O51

with wire

Lamp

8V 50mA

(PROTECTTON

AEL-O42

)

Peak

level

(R

IGHT

AAW.O51

CHANNE

Variable 100ko-B (LEFT

ACV-009

meter

LEVEL)

Variable resistor

100kf,-B (R

IG HT LEV E L)

ACV-009

L)

resistor

4. Rear View

Input

AKB.O13

terminal

Output terminal AKE.02O

(A)

Spacer AEB.O75

Spacer AEB.075

Qround terminal

AKE.O19

Slide

switch

(IMPEDANCE) ASH.014

Output AKE.O21

terminal

(B)

ir3

EXPLODED

9.

NOTE:

Parts

indicated in

green

Top ANE.097

VIFWS

type cannot htisupplied.

BM.3x8*,

cover

ili

BM.3x8

PM.4x10

BM.3xg

rTw.30

PM.4x10

@.

rTW.3d

d @''

-(9-

:ii!i:.ii1iitiiil,i,r::.iiirf

Front

ANB.358

Handle

ANK-084

illliliJtlirj.l$;t;:1}?;i!,Y,

(POWER)

Knob

AAD.109

Knob (LEFT

AAB-097

LEVEL,

PM.3x8

FW.3@x0.5t

panel

assembly

RIGHT

{ii'i!.!tir.1

1i1r1;tl,iii!:il

VEL)LE

@

iri

:

PART

1

PM.3x8

FW'3@x

0.51

@^

Nut 871-004

Spacer 9dx1t

M9

M45-086

3

sIrEc-e

PART

page

S*e

3

27

PM.4x

RT.4x16

Foot

assembly

AEC.178

RT'4x16

10

30

,r..",

i

*'b

BM'3x8

Foot

assembly

AEC-178

RT'4x

16itTW

PART

1

NOTE:

Parts indicated in

green

type cannot

..

supplied.

tb

t.'1

,i::,

Metpf

amplifier

AWM-081

assembly

A

B

r..

-i

,i

.

RT'3x6

(bar

Lamp

AEL-058

:ffi

type)

qgf.l:,.,,,,i,,

PL

socket

AKK-OO2

-:iii:i:r

.'

ii

i-:.fl.ira:

8V,

..PL

r,

:,,

Relay

ASR.O15

N.3d

PM.4x

8

orw.ao'

A

B

c

D

25

Rubber

AEB-051

Lamp

with

AEL.O42

holder

wire

8V,

c

D

50mA

3

PART

NOTE: Parts indicated

Power

2

green

in

transformer

type cannot

ATT-249.

A

':.:i.!,:itlii:!'1.:i.i..!1j,..:1i.i-1:.:t:;i,|:'it,r'.:.i,.tft:itjiri:rl:lilsi

I

B

Electrolytic

15,000pF, 100V

ACH-052

E

15,000pF ACH-052

PM'4x10

capaci

lectrolytic

Diode KBH-2504

ti'r

supplied.

be

Power AWR-093

T'4x8

supply

RT.4x8

RT.4x16

circu

it assembly

Fus6.2A

AEK;103

RT'4x8

3

.,1

"i

Fuse 1

AEK-1I

B

Ceramic

0.01pF, 1

ACG-00!

c

RT

c

Electrolytic 15,0001rF,

t00V

ACH-052

Spring

washer

ABE-026

Nut

M6

Spring

washer

ABE.026

Nut

M6

ABN.O17

M6

MG

sw.30

Mounting pillar ALA.O21

Terminal

D

striP

1

(4P)

PM.3x8

RT.3x6

D

PM.4x10

26

siPEC-e

PART NOTE:

Parts indicated in

A

Terminal 9o.16

AEC-252

Terminal

M4e-052

B I

Terminal M49-014

Slide switch ASH-014

c

3

green

Output terminal AKE.O2O

Output

AKE_021

board held metal

held

board

(IMPEDANCE)

metal

type

cannot

(A)

terminal

,lil

be

(B)

t

L

Sonnector i$sembly 6DX-020

supplied.

(6P)

power

ACp ADG

ry''

-

cord

-013

BM.3x8

OTW'4d

wN.4O

,,tt

tinBUi$i;il.rh;l.i'.:, AKB-013

Ground AKE.O19

terminal

Screw ABA.O89

Spacer

AEB-075

i

A

:

c

D

Connector assembly ADX.O23

Power

amplifier AWH.O45 (See

page

(3P)

28)

assembly

Connector ADX-024

conn$to, assernhly

(6P)

ADXS21

a*sembly

,!i

PoweF.ampl AWH€45

(See

p$se

if ier

28)

lr

(3P)

assembly

Connector assembly

ADX-O22

(5P)

Connector assembly

ADX-O22

(5P)

D

POWER

AMPLIFIER

NOTE: Parts indicated

green

in

ASSEMBLY

ype

t

cannot

be supplied

A

B

RT.3x

Varistor

,STV4H

BM.3x8

A

BM.3x10

Toggle

nut

AEC-225

.t'..ii.:.:t,lt':',

,::.,r'.:f

Power

2SC1

.i11:.:..:.,.r:rii...:.ljt::ri.lf,iL:,:llt!r.il!tr...,.,ft,...ii.:,:

i

i::rti..ii

rr,i:

transistor

586

Power

transistor

2SA909

PM.3x

16

B

8

,

I

Insulating

wafer

x:c-076

c

Transistor AKH-OO1

BM.3x8

'

Contact strip AKM-018

BM'3x8

' '

,"Contact

:1.

',

l'

strip

'.

AKM.O19

D D

(3P)

,'.

i:'

(5P)

socket

Contact

AKM.O2O

strip

(6P)

BM.3x

8

c

2e

sPEC-e

NOMENCLATURE

The fouowing symbols

Symbol

RT

PT Pan

BT Binding head

CT

TT

ocT

CM

octv

Erazier

head tapping

Countersunk head tapping

Truss head tapping screw

Oval countersunk head

Pan

head machine

Countersunk

Oval countersunk

OF SCREWS.

Do.cription

head tapping

tapping screw

head

WASHERS ANDNUTS

stand for screws,

screw

tapping

screw

machine

head

washers and

Shspe

fF-

ft-.

u--

t-

@

vt-:t

F

nuts as shown in exploded view.

Symbol

EW

SW

N

oTw

E type

Spring lock

Washer

Internal toothed lock

Outernal

sc Slotted set screw

Slotted set screw

Dsscriprion

washer

faced

nut

toothed lock

washer

{Cone

(Flar

washer

ooinr)

point)

Shape

\D

oil

A4

\\,

og

@fl

@il

#l

e=D

cEr

I

Tt!!

AM

PSA

PSB

PSF

EXAMPLE

PM ' 3x8

-::::";::1,,

L

Truss head

Binding head

Pan head

Pan lock

Pan head

screw with sprjng

head

screw

washer

scr6w with flat

Symbol

machine screw

machino screw

with spring

and flat

washer

washe.

r

G=

hr

HS

ocw

CW Countersunk head

FW'9@x 1'

Hexagon socket headless

Oval

countersunk

Round head wood screw

T-

th;skns55

-

diameter

Symbol

set

head

wood

wood screw

in mm ( I

(

in mm

d

@@

) )

-11'

/At

{( )l d

I

1O. SCHEMATIC

DIAGRAMS, P.C.

AND PARTS LIST

BOARD PATTERNS

10.1 SCHEMATIC DIAGRAM AND MISCELLANEOUS Miscellaneous Parts

CAPACITORS

Symbol

c1 c2 c3 c4

c6 c7

c9

c10

RESISTORS

Symbol Ds3cription

R1

VR2

SWITCHES

Symbol Description

s1

Csramic 0.01 150V

Electrolytic Electrolytic 15,OOO Electrolvtic 15,000 El€ctrolytic

Ceramic 0.O1 150V Ceramic Ceramic Ceramic O.O1 150V

Ceramic

AND POTENTIOMETEBS

Metal Metal

Variable resistor (LEFT

Variable (RIGHT

(POWER)

Slide switch

(IMPEDANCE)

List

D€scription Parl No.

15.000 |OoV

15,000 l00V

O.Ol 15OV

O.O1 15OV

0.01

oxid6 4.7k oxide

LEVEL)

4.7k 3W

1ook-B

resistor 100k-B LEVEL}

IOoV

1oOV

'l50V

3W

ACG-003

ACH-052

ACH-052 ACH-052 ACH-052

ACG-001 ACG-001 ACG-001 ACG-001

ACG-003

RS3P R53P

ACV-009

ASK-O80

ASH-014

Part

No.

472K 472K

Part No.

PARTS

NOTE:

.

Copocitors: in

.

fiesrsao/s. in a, AW unless otheruise

FUSES

Symbol

FUl FU2 FU3 FU4 FU5

FU6 FU1 FU8

OTHERS

Symbol

T1

PL1 PL2 PL3 PL4

PL5

RL1 RL4

D1 D2

pF

unless

otherwise noted

D€scription Part

Fuse Fuse Fuse 1A

Fuse Fuse Fuse 12A

Power

Lamp with wire 8V, sOmA Lamp Lamp Lamp Lamp

Relay

Diode Diode

(Secondary)

2A

(Secondary)

2A

(Secondary)

1A 24

{Secondary)

(Primary

D€rcription Psrt

transformer

(bar lbar

(bar (bar

l

typel 8V, lype) 8V, 0.3A rypel 8V, 0.3A typel

0.3A

8V, 0.3A

p:pF

noted h:hf]-, M:Ma

No.

A E K-103 AE

K.103

AEK.106

AE K"106 AEK-103 AEK-301

No,

ATT.249

AEL.U2 AEL-O58 AE L-O58 AEL.O58 AE L-O58

ASR-015 ASR-016

KBH-2504 st801-02

2sA7s8

25A725 2SC1312

Bt

g7Y-ct

E itsE,

-82

r--r

ffiirE" U)-B

2sA733

2sA872A

2SC94S

2S8507 2SB63OA 2SD31 3 2SD61OA

2SA909

A--B 4J-;

(2s8600A)

2sc1586

(2SD555A)

|lF}r

l/11 lr{ -

c

U l$=%

'-'-l'>B @?

2sc1384

rlPl\

[ \l 5,t

\\sl

c

-

Schematic

Diagram

nNe Ass)

PO$/ER

AwH

-

04$

INPI.JT

LCF

| tr\/trt

@

I

TI

t;

rt

CONTROL

0r.Qe,

2SD6l0A

2

l

r0

Qrz

'+

c?60P

C3

n,

.1;=

16s

|

20v

,'9

tH o,,Dr,Ds,os,Dr,Dro

POWER

lS24?3

xs

N1P

ASSy

AWH - 045

2SA?33

0r,o"

os,q'o2SC945

xt

xz

&:22

Rr ^

2SCt58S'xi

rER

AtlP

orDgz

or,Qr,Qr,Qr2SC13l2,c

r'nt:ilrlir:,+il::.]

e:,er,0s,0c

RrlK(2'\i)

Assy

lS24?3x3t

iriir.t

;i:ri,

rj:,

2SA?25'+

Awll-081

:nji.:.iir!

Drs

:Fil-,u

6 E

d

.:i+

6 i

:

NOTES

S W I TCHES

:

P0$/ER

Sr

SPEAKER

ST,

+

0N

8(}-4Q

0,,l524?3

SWITCH

oFF

II'IPEDANCE

flss 2.'lK

wZiS?

ll'.25850

j

0n*

RELAYS

RLr

RLr r

RL+ RLs

3

3'l

ri

Cl58*xi

LEFT

RIqHT

050

9N

PO9{ER $'mY ASSy

rs:

t6T

i$

---

A A

AWR

-

093

sPEC-e

RELAYS

RLI PRII'4ARY

CONTROL

RLz.3

SECONOARY SURGE CONTROL ANO VOLTAGE

OUTPUT

RL+

NUTING

RLs

kto^s

SURGE

RELAY

CUT-OFF

RELAY

Rs. ??

CURRENT

SELECTOR

RELAY

RELAYS

RLr

c'URRENT CONTROL RELAY

AC r20V

50-60 Hr

LIilITOR

SENSITIVITY

'

l-l]

:

v

(

:

v)

v0tTAGE NECESSARY

SIGNAL 250fv,/6Q

DC OC DC CURREN.T'

oUTPUT

NO INPUT

VOLTASE

VOLTA$S AT 25OfV/EQ

AT

::i;l

NO

AT

POWER

INPUT

FOR

(lKHz)'

SIGNAL.

OUTPUT

SIGNAL,

OBTAINING

POWER

32

10.2 FOWER

SUPPLY CIRCUIT ASSEMBLY

(AWR.Og3I

Power

Por,ver

Power

transformer

Power

transformer

(OR)

(O

R

)

transformer

ED}

{R

(R

EO)

Cz- Cs

15,000/1(xh4

Rr,Rz

4.7ksl(3W)

Power

amplifier assembly-No.21

Meter amplif

ier assembly-No.23

Power amplif ier ass€mbly-No.5

Meter

amplif

ier

assembly-No.7

Power

transformer

(GRN)

transformer

(BLK)

(GRY)

transformer

(BLU)

Power

amplifier

Meter amplif ier

ampl itier assembly-No.5

ier assembly-No.7

amplif

amplif ier ass6mbly-No.

amplifier

ass€mbly-No.10

ass€mbly-No.

ass€mbly-No.6

6embty-No.6

1 1

ramps

8V 0.3Ax4

assembly-No.5

(R

CH.)

(L

CH.)

Parts

List of Power

CAPACITORS

Symbol

c1

c4

Ceramic C€ramic Ceramic Ceramic C6ramic

Supply Circuit

De3cription

o.01 o.o'l

0.01

Assembly

150V 150V 150V 150V 150V

(AWR-093)

Psrt

No.

ACG-O04-0 ACG-004-0 acG-00+o ACG-004-0 ACG-004-0

sPEC-e

c6 c7 c8

C€ramic C€ramic Ceramic

c9 cl0

cl1 c12

Efoctrolytic Electrolytic

RESISTORS

Symbol

R1

D€.cription

SEMICONDUCTORS

Sytnbol

ol D2 D3 D4

D6

o7

DA D9 D10

Diod€ Diode Diode Diode Diode

Diods Diode Diode Diode Diod€

Oe.cription

0.01

0.ol

47O 1000

20 20

150V 150V 150V

35V 35V

201, 2w,t

ACG-OO4-0

ACG-O04-0

t:::"""

cEA

471P35€5C

cEA 102P35-85C

Prrt No"

ACN-00S0 ACN-005-0

Pr.l

No,

-04

stB0l st

801-o4

srB01-04

-04

stB0l sl Bot-02

slBol-o2 srB01-02 slaol-o2 stB0l-02 stB01-o2

OTHERS

qmbol

RL1 RL2

Rolsy Rolay

Ds.cription

Part No.

ASR-013-O ASR-O13-0

IO.3

POWER

AMPLIFIER ASSEMBLY

(AWH.I!4sI

Meter amplif

Polwr

supply circuit s€mb|y.Nos.23,24,25

Pn-Cr3

25A90

assembly'No.24

i€r

9

MEtsr amplif ier asembly-No.21

Power

amplifier ass€mbly.No.7

(221

(R

CH.)

Meter

amplitier assembly-No. 18

(

191

Power srpply circuit assembly-N06. 32,31,34

ier

smplif

ass€mbly-No.7

Pourer supply circuit Nernbly-No.28

Meter amplifisr

Metor amplif ier

Power supply circuit

assembly-No. 15( 1

assembly-No.23

ass€mbly-N

6)

06.

19,

20,21

0*-

0,r

25C1586

VRr

100k-B

siPEc-e

=

mU

f

d

c{ G

(M9)s'0

-(\l

fr

-rC)

dF

t---

F

0'u

A

&-l

ffi

(/.tS)Sn

.^6

jitn

jg

@(v

(o

A

B

r

i*

!o

tlt

r

(D

(M?l)Offuu

$l

<n <\l

/+

l3

=

.'4i

uL:t

iE/-ZZel

ilzu

-

t'0

6l

c

0i0tu

N

o

ct

.;<

-^./t 5c\r

N

C-l E* G'

f

r

=

F

"EE

(o

ct

.J' (!

y8:tsu

l*

)1,9

sg

e

o9o'o''

a

(?)

r sr

cl ct)

D

d-

c

td

<a> -at)

- O-.o

=

a

F

t

+c?

)001t'u

ol

9A/

riil;*ri:l;

s-

.t>

4

t

o

*'$

"'

vsttu

?

E

di+

cl

D

dI;

r

y0

Y

ry

t_

N

tlzz'u

39

Parts

List of Power Amplif ier Assembly

(AWH-045)

CAPACITORS

Symbol Description

c1 c2 c3 c4

c6 c8

c9 c10

Efectrolytic C€ramic Ceramic 47p Electrolytic Electrolytic 10

Efectrolytic Ceramic tulylar lvlylar Ceramic 47Op

ct1

:::T::

c13 cl4 c15 cl6 c18

RESISTORS

R1

R3 R4

R6

R8 R9 R10

Ceramic C6ramic Ceramic 820p Ceramic

AND POTENTIOMETERS

4.7 35V 68p sOV

10 35V

22 35V 4p 50V

0.1 20OV

0.1 200V

470p

O.O47 l50V

22p

47Op

2.2M '110k

2.2k 15k

1.8k

r.8k

33k

't5k

4.7k

50V

35V

500V

500v

50V 50V 50

Part No.

cszA 4R7M

35

Symbol D6scription Part

ccDsL 680K 50 ccDSL 470K

50

cEA t00P 50

r00P

cEA cEA

220P

35 35

ccDsl o40K 50

104K

coMA

200 coMA 104K 200 CKDYB

:.:?L'.1""

ACG-OO9-O

CKDYB 220 50

CKDYB

CKDYB 471K

RDY.PS RD%PS 114J RD%PS RD7.PS ROlr'rPSF

ROIZPSF RD7.PS RDz.PS 153J RS2P 472K ROy.PS 472J

471K 5OO

"'

821K 50

50

225J

222J 153J

122J

333J

SEMICONDUCTORS

R31 R32 R33 R34 R35

R36 R37 R38 R39 R40

R41 R42 R43 R44 R45

R46 R47 848 R51

vR2 VR3

Symbol

o1 o3

04 o5

film

C6rbon

film

Carbon

film

C€rbon

film

C€rbon

film

Carbon

lilm

Carbon

film

Carbon

tilm

Carbon

Wire wound Wire wound 0.5 Wire wound Wire wound 0.5 Metal

oxide

Wir6 wound 2.2 Wire wound Carbon film

film

Carbon

Semi-fixed Semi-fixed S6mi-fixEd

Transistor Transistor Transistor Transistor Transistor

27 27

10 10 10

0.5 5W

0.5

0.5 lk

1O 910

1.3k

470-B

100-B 100"8

Doscription Part No.

5W 5W

5W 5W 5W 3W

vll 5W

No,

RD%PS 27OJ RD%PS 27OJ RDY.PS 1OOJ RDY.PS l RD%PS 1OOJ

RD%PS 1OOJ RD%PS l RD%PS I OOJ RTSB RTsB OR5K

RTsB OR5K RTsB RT5B OR5K RTsB RS3P 102K

RT2B 2R2K RTSB 1OOK RD%PS 9'I1J RDY.PS

ACP-051.o ACP-050-0 ACP-050-0

2SA798-G or F 2SA872A-D or E 2SA872A-D or E 2SD61oA-R 2SD6'l0A-R

OOJ

ORSK

OR5K

ORSK

'I32J

or S, O or

S, O

40

R11

R12

R13 R14 Rt5

R16 Rt7 R18 R19 R20

R21 823

F24

100 100 100 100

22

't

10k

22

Carbon film

.Carbon film

Carbon lilm Carbon filrn 22Ok

film

Carbon

1ook 100k

22Ok

47

RD%PMF lOIJ RD%PMF 101J RD/,PMF 101J RD%PMF 101J

ao%PsF 22oJ RDT.PSF BDT.PSF BD%PSF RD7.PSF 22OJ

RD7.PS

RD%PS 101J AD%PSF 221J RO%PSF RD7.PS

RD'/.PS RD%PMF RDT,PMF RD7.PS RD%PS

22OJ

114J

220.J

1O1J

221

47OJ

470J

471J

471J 331J 331J

06

Q7 08

o9

010

011 012

or3

014

015

o16

o17

018

019

Transistor Trantastor Transistor Transistor Transistor

Transistor Transistor Transistor Tlansistor

Transistor

2SD61OA-R 2SB63OA-R or S, O

2SA733-R 25C945-R 25C945-R

25A733-R

25061oA-R

2SB630A-R

2SC1586-0 or

25D555A-R

2SC1586-0

25D555A-R or

2SC1586-0 or 2SD555A-R or S

2SA909-O

2S8600A-R or S

2SA909-O or R

2SB60OA-R or S

2SA909-O

2S860OA-R or

or S, O

or

or R

S, O

R

S

R

S

€tPEC-P

Symbol

o1

D3 04

D5

D6 o7

D8 o9

010

Dl1

Thl Th2

Th3

OTHERS

Symbol

L1

D€scription

Zener diode Diode

Diode Diode

Diode

Diod€

Diode

Thermistor Thermistor

P.T.C.

thermistor

D.3criplion

AF choke coil

Part No.

BZ

340 1S2473 (1S1555)

STV3H-Y 1S2473 (1S1555)

152473 {1S1555)

-04

stB0l stB01-04

152413 {1S1555}

1S2473 (1515551

STV4H

TH101-2 TH101-2

AEX-O44

No.

P.rl

ATH-012-0

RLl RL2

Reod

relay relay

ASR-017-0

ASR-005-C

A

B

10.4

METER AMPLIFIER ASSEMBLY

(|YlD00ereu

t-

raN

<? (?

o a,

(\l

c

a

(Mzll)vq

0su

Jyl .

i-k$ 5

F.o==

+t

/Za

9t

t0'0

r

'- -

o(.,d-3

dtr

+

({

U,

So

r_\-

9c/01

31.')

-1r)

DtJ

zLJ

.tO

r

|l

*

G

(n

ql cD 6r,

ro

{

q) c)

U'

(\l

a

9

N

PE

,=

+=

(J

6l

(t)

::(n

-Gl

-

CJ

x

(?

r

.f

<\r

I

,..: ,r{til:

x

GT

r

P(!-)

dF

-(J

ur

-2

(NWM.O8l}

(M%)vi

sc/01

r o

ro

m

(t, cl

=

<i

Ll.

Jlo

sc/zlst)

!n

T

<0 o N

=

.O

sr/

]Lv

C-

N

=

',

/ c7*

8;

s*

2

+N

t,

OO

N

(\l

o

I

,o

GO .4

c-l

t

A

--

T

>.Ll

<

co <f)

zz

esu

(?

t!*,

t

al

?

yOgi

rsu

B

$

o

I

o

@

(t,

N o

tfj #t

J\tta

1'-t_

I

4?

-00r

g

c

0:,!'^'l

A i ._ i

st

v X

K)

s:

cr

s2

C)

U'

ct,

6r

cr

s

c!.

c:

a

q

ct

€

N

c-)

r

F$

=

D

S E

o<\l

rl

.t,

I

c-

+

CT

ygtzz

u

g.

ct

";

o

j

a

C'

zu^

c

5toslscu

ystrzu

D

Peak

le\rel meter

(R

chl

-+*---.-------<',

r,

,,,

*

{ia"!i;

tff t.

E

*"

l''

:':'l

i{

15

Power

amplifier

Power

amplifier

Power

supply

amplifier

Power

supply

Power supply cirbuit

Power supply circuit assembly-No.30

Power

amplifier

Power

amplifier

assembly-No.8 assembly-No.8

assembly-No.2

circuit

assembly-Nos.

assembly-No. t6

circuit assembly-Nos.

assembly-No.31

assembly-No.4

assembty-No.4

(L {R

l

23, 24, 25

(R

CH.)

{L

CH.)

19.20,21

<---'------------

CH.}

8r,

4f,,

-"

Su

8s,

4f,

Power amplif ier assembly-No.

Power amplifier

assembly-No.19

43

{R

l9

CH.)

Peak

E|FEC-P

lar6l

meter

(L

ch)

rNo.19 r(R

CH.)

(L

CH.)

Power

amplif

Power supply

Power

supply circuit assembly.No.26

circuit assembly-No.27

Power

transformer

Power

transformer

Power

supply circuit assembly-No.35

{BRN}

(WHT)

supply circuit assembly-Nos.32,33,34

ier assembly-No.5

Parts List of Meter Amplif ier Assembly

CAPACITORS

Symbol

c1

c4

c1 c8 c9 cl0

c11 c12 cl3 c14 cl5

cl6

c18 c19 c20

c21

RESISTORS

Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic

Efectrolytic Efectrolytic Efectrolytic Efectrolytic Efoctrolytic

Efectrolytic

Ceramic Ceramic

Ef€ctrolytic Efectrolylic

Electrolytic Electrolytic

::

Electrolytic Electrolytic

AND POTENTIOMETERS

Symbol

M6tal oxide Metal

R3 R4

R8 R9 Rr0

R1l F12 R13 Rl4 R15

R16 R17 R18 R19 R20

R21 R22 R23 R24 R25

Carbon Carbon film Carbon

Carbon film Carbon Carbon film Carbon film Carbon

Carbon film C€rbon film Carbon Carbon film Carbon film

Carbon Carbon film 4.7M Carbon Carbon C€rbon film 4.7M

Carbon film 15k

Carbon film Carbon Carbon film 15k Carbon

Description

1 25V 1

25V

1 25V

"..

1 220

22O 220 22O 47O 47O

47O

0.O1 O.01 22 22

10 10

10

25V 6V

6V 6V 6V 6V

16V 50v 50v 35V 35V

35V 35V

160V 35V 35V

D€scription P6rt

1k 2W

oxide

film

lk 2W 47k 47k

film

filrn

film

film film

film

8.2k

8.2k 'l

OO

10O

10O 1O0 27 27 27

2'l

4.7M 4,1M

15k 15k

3.3k

cszA

cszA 0't0M 25 cszA cszA

cEA 221P

cEA cEA cEA cEA

cEA cKoYB 103K CKDYB cEA 220P cEA 220P

cEA r cEA 1

ACH-313-O cEA 100P cEA t00P

RS2P RS2P RD%PS 473J RD%PS RD%PS

RD%PS RD%PS A22J RD%PS RD%PS RDy.PS 101J

RD'/.PS 101J RD%PS 101J RD%PS RD7.PS RD/.PS

RD'/.PS 270J RDl.PS RD%PS 475J RD7.PS 475J RDY.PS

RDI.PS RDY.PS 153J RD7.PS 153J RD7.PS 153J RD7.PS

(AWM-081

Pert No.

)

010M 25

or0M 25 01otvr 25

6

221P

6

221P

6

471P

6

471P

6

471P 16

50

1O3K 50

35 35

00P 35 00P 35

35 35

No.

't02J 102J

473J 822J

822J

101J

27OJ 27OJ 27OJ

475J

153J

332J

Sylhbol

R27 R2a R29 R30

R31 R32 R33 R34 R35

R36

R37 R38 R39 R40

R41 R42 R43 R44 R45

R46 F47 R48 R49 R50

R51 R52 R53 R54

R56 R57 R58 R59 R60

R61 R62 R63 R64 R65

R66 R67 R68 R69 R70

VR1 VR2

De.cription P€rt

Carbon film Carbon film

film

Carbon

film

Carbon

film

Carbon

film

Carbon

film

Carbon

film

Carbon

film

Carbon

film

Carbon

film

Carbon

Iilm

Carbon Carbon film

lilm

Carbon

3.3k

3.3k 150 150 150

l50

330 33O

4.7k

Carbon film 1.5k

lilm

Carbon Carbon Carbon

tilm tilm 100

6.8k

Carbon tilm 100

film

Carbon

8.2k

Carbon filrn 150k

film

Carbon

Carbon Carbon Carbon

filrn

tilm tilm lilm 22

4.7k 15k

15k 'lsk

Carbon film 150k

Iilm

Carbon

tilm

Carbon Carbon film

film

Carbon

film

Carbon

tilm

Carbon

{ilm 15k

Carbon

tilm

Carbon

Metal oxide

film 1k

Carbon

4.7k

2.7k

2.2k 47k

4.7k 15k

k

I

330

Carbon film 22

Carbon film 22 Wire wound 4.7

Metal oxide

Carbon tilm

film

Carbon

Semi-fixed Semi-tixed

1k 47O

47O

100-B 100-B

hw vzw

1AW

vd

1AW

5W 2W

No.

RD%PS RDY.PS RDY.PS RD/.PS RD7.PS

RD/.PS

332J 332J 332J 332J 332J

332J RDY.PS 332J RD%PS 151J RDY.PS

151J RDI.PS 151J

:?':::1"'

RD'/.PS 33I J RO%PS 331J

RO%PS 472J RD/.PS 152J RD%PS RD%PS RO%PS 101J

RD%PS 101J RDy.PS 822J RD%PS 154J RD%Ps 472J RDY.PS 153J

RD/.PS |53J RO%PS 153J RD%PS 22OJ RD7.PS RD%PS 472J

RO%?S 272J RD%PS 222J RDY.PS RO%PS 472J RD%PM

RDY2PM 153J RD7,PM 1O2J RS2P RD%PM 1O2J RD%PS 22OJ

RD%PS 22OJ RT5B 4R7K RS2P RD%PS 471J RD7.PS 471J

ACP-O50-O ACP-050-0

682J

154J

473J

.I53J

331J

102J

45

SEMICONDUCTORS

Symbol

o1 a2

o3

04

o7 08 09 010

011 o12 013 014 015

Transistor T€nsistor Transistor Transistor Transistor

Traosistor Transistor Transiator Transistor Transistor

Transistor Tranaistor Transistor Transirtor Transistor

Doscription

Fert No.

I

2SC13't 2-G 25A725-G 2SA725-G 2SA725-G

25A725-G 2SC1312-G 2SC13't 2SC1312-G 2SC1312-G

2SA733-O 2SC1384-R 2SC945-O

2SC138+S 2SC138+R

2-G

or

or R

or S

Symbol Derciption

D34

D36 037 D38 D39 D40

D41 D42 D43

R

S

D44 D45

Zener diode Diode

Diode Diode Zaner diod6 Zene. diode Diode

Zener

diode Zan6r diode Diode Diode Diods

Psn

No,

w2061

152473

st

801-02 slB0l-02 w2150 wz't 50

1S2473

wzl57 w2157

rB01-o4

s

152473

-o4

rBol

s

o16 017

D1 D2

D3 D4 D5

D6 D7 D8 D9 Dto

D11 D12 D13 D14 t)15

Dl6 017 D18 D't o20

D21 o22 D23 D24

I

Transistor Transistor

Diode Diod6 Diode Diode Diode

Diode Diod€ Diod6 Diodo Diode

Oiode Diode Diode Diode Diode

Diode Oiode Oiode Oiod6 Diode

Diode Diode Diode Diode Diode

2SD313-D 2SB5O7-D

152473 152473 152473 1S2473 1S2473

152473 152473

152473 1S2473 152473

152473 1S2473 1S2473 152473 1s2473

'ts2473

152473

1s2473

152473 1s2473

1S2473 1s2473 152473 1s2473

't

s2473

or E

46

D26 D27 D28 o29 D30

D31 o32 D33

Diode Diodo Diode Diode Oiode

Diode Diode Zenor diode

1S2473 152473 152473 1s2473 152473

152473 1s2473

wz't 00

11. PACKING

pad

Top

AHA-09O

Panel

cover

AHB-027

SPEC.El

Connecting

with

ADE-013

plug

cord

Polyethylene

AHG.O29 Operating

ARB.153

Front

pad

AHA.O91

Bottom

AHA.096

packing

Inside

AHC.023

cover

instructions

Rear pad

AHA-092

Packing case

AHD.272

12. PARTS

LIST

OF

EXPLODED

VIEWS

Par$ No.

AAB.O97 AAD,1(D AAW.Os1 ABA.O33 ABA-O8A

ABA-089 ABA.O9O ABA-097 ABE.026 ABN.OO9

ABN-Ot 7 ACG-OO1 ACH-052 ACV-009 ADE.O13

ADG.O13 ADX.02O ADX-O2l

ADX-O22 ADX-023

ADX-024 AEa,oo'l AEB.O51 AEB.075 AEC-036

Paats Namo

Knob Knob

Peak

Level Meter Screw M2.6x4 Screw

Screw Screw M4x8 Mounting Spring Washer M6 Union Nut

Nut M6 Ceramic Capacitor Ele, Variable Resistor Connection

AC connector Ass. Connector Connector Ass.

Connector Ass.

Washer

Rubber Holder

Spacer Clip

Pillar

Capacitor

Pow6r

Cord

Ass,

{lnternal

Cord

(6P) (6P)

l5P) (3P)

{3P)

Toothed Lock}

{with

Pin Plug)

Parts No.

AKM.OlA AKM.O19 AKM-O2O ALA-021 AN

8,358

ANE,O97 ANK.O84 ARB.153 ASH414 AS

K-080

ASR-015 ASR-016 ATT-249 AWH{45

AWM{81

AWR-O93

871-OO4 M4s-086 M49{14 M49-052

25A909 2SB

1586

KBH25O4

STV4H

Parts Name

Contact Strip Contact Contact Strip Chassis Mounting Pillar

Front Panel

Top

Cover Handle Operating Slide Svltitch

Lever

Relay Relay Power

Pow€r

Nut Mg Spacer Terminal Terminal

Power Transistor

Diode

(3P)

Strip

l5P) (6P)

Ass.

Instruction

Switch

Transtorm€r

Ass.

Supply

gmmx1t

Board Board

Held Metal Held Metal

AEC-076 AEC-079 AEC-178 AEC-222

AEC-225

AEC-236 AEK-103

AEK.106 A€L-O42 AEL-OsA

AHA-O9O AHA-091 AHA-OS2 AHA.096

AHB.O27

AHC-O23

AHO-272 AHG-O29 AKB-013 AKC-031

AKE-O19

AKE.O2O AKE-O21

AKH-OO'I

AKK-OO2

Insulating

Terminal Togqle Nut

Plastic

Fuse 2A

Larnp with Wire Lamp 8V

Top Pad

Front Rear P6d Bottom Panel

Insid6 Packing Packing Polyelhylene

Input T€rminal

Ground Oueut T6rminal Output Transistor PL

Board

Pad

Cover

Terminal

Socket

Wa{er

Board

0.3A

Pad

Cas€

Cover

(4P)

strip

Terminal

Terminal B

Socket

(8V

A

50mA)

PIONEEFI

4-'1, Meguno

75 oxfo.cl D.rwe.

1

184 Boundanv troad, B.aes de, Vicconi6 3'l95,

7A

ELECTFI(fNIC GOFIFOFIATION

U.Ei. PIONEEFI ELECTFIC'NICS CCIF:PG'FIATIGIN

t-dg-.-'

t -,

FIONEEFI ELECTFICINICA AUATFIALIA PTY. LTc,.

l-Chome, Megueo-ku, Tokyo T53. Japan

Moonach e, New Jel.sev o7o74,u. -A.

PIG'NEEFI

--,

ELECTFIG,NIC

*eg no. 9, 2OJO A.rwp.o. Ele

(

EIJFIC,PE! N.V.

g,ur

Alst.a ia

o

SEPT, 1975

Printed

in Japan

Pioneer Spec-2 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual