Hitachi tra-505 service manual

MODEL

TRA-505

High

,t,, ,

1 I 1

I I I f

O ' Ill '

_,

Fidelity

.,

~

!O

4-Track, 2-Channel

;/.·

I

/

---

-

,.

t~

·!>;

--

-

, u

u.

...

•

Tape

Recorder

34

·

----

----

ACCESSORIES

M

icrophone

Power

Sour

ce
5" Reel
Earphone

H

ead

Splicing

SPECIFICATIONS

Vacuum

Diodes

Tape

Speed

Tape

Reel

Recording

Recording
Erasing

Track

Power
Power
Speaker
Output
Frequency
Input
Output
Fast

for

Rewinding

Microphone
Dimensions

Weight

Cord

and

Recording

Brush

and

Tape

Tubes

Time

System

System

Mechanism

Source
Consumption

Response

Impedance

Impedance

Warding

Time

Polishing Cloth

Time

and Extension

Tape

12AX7A x 2,
lS
1½

1

3

'

3

hours

(

in

in
AC
AC
4-

track, monaura
AC
Approx.

6

½"x

lW
100-8,500
Microphone
LINE
Less

Less

Unidirectional

Width 11" (28 cm)x

Appro

Cord

6BM8

314X 2

lN

5''

3¼",

OUT

x.

reed

at 3¾"
of

55W

12

34AX4

sec

/sec. 6 h

this HITACHI

recording

oval type

cps

600kn Radio

l00k

3 mi

nutes
dynamic

lbs

. (5.5

and 3¾"/

or

case

monaural

bias
erasing

110/120/220/240

than 4 minutes
than

x 1

.

ours

at

LONG

)

l,

stereophonic

volts,

50

or

P.M .

speaker

at

3¾11/

sec

.

100

n EXT. SP 8 n

470k

(5"

reel

used

(5"

reel

used

microphone

Height 5½""(14 cm)x

kg

)

1½"/

sec

.

PLAY TAPE 5''

system

60

cps

. (

either

- 5,

000

cps

n

)
)

Depth 11¼"

at l½"

reel

is

specified

sec

(35µ

tape

.

(28 .5 cm)

to

) is

your

used

set

)

Froatal sens

itivty

excallent

VIBRATING

MOVING COi L

o·

PLATE

MAGNET

PLATE

RING

YOKE

FEATURES

■

4-Track Recording

allowing great variety
1-1 Monaural recording of 4-track tape

up

to a maximum of six hours.

1-2 Since its recording-reproducing head

stereo type, while recording

Each

and

imagination

track records separately,

in

recording.

can

continue

is

a 4-track

on

one

channel,

you

can reproduce with another channel.

1-3 Connect

tape which

1-4 Radio and microphone outputs

an

external amplifier

has

been stereo recorded.

and

can

reproduce

be

recorded

together.

■

Hitachi's unique one-hand control All operations

--recording,
stopping

■

--

Tape counter

counted,
be

identified at a glance.

■

Natural voice reproduction The highly efficient

reproducing, erasing, rewinding, pause,

are

easily operated single handed.

Each

revolution of the tape reel

so

that

the recorded position

on

tape

is

can

and unidirectional microphone eliminates all extrane­ous

sounds other than those desired for recording.
The speaker incorporates a newly-designed powerful
magnet and elliptical diaphragm, reproducing beautiful
symphonic tone. A tone control regulates the tone
to your preference.

■

A highly sensitive

the proper recording condition

■

A one-touch power switch makes handling ex-

sound

level meter indicates

at

a glance.

tremely convenient.

■

Slim

and

trim, it's easy to carry. The cover

be

closed with 5 inches tape reel mounted. Accessories

(microphone, power cord, etc.)

can

be

stored in the

can

bottom of the case.

YOKE

UNIDIRECTIONAL MICROPHONE

Unidirectional

extremely
to

extraneous

with

no

Principle

on
into
designed
of

frontal
vibrating
the
as
traveled
of
pressure
of

plate
damper

traveling

B'
vibrating
c

ircuit

back

of
great

noise

its

vibrating

electrical

other

Construction

sound

vibrating

longer

distance

the

damper and

A'

on

On

the
from

; B

at

the

of

sound

Its

unique

fore

and

difference

Microphone

sensitive

noise

or

and

Structure

signals.

to

have a

~ounds

itself

A is

around

striking

of

A.

A'

plate

directly,

plate

distance.

is

negligible

other

hand, back sound

inside

will

strike
the

vibrating

plate

cancel

this

microphone

interference

characteristics

back

in

to

sounds
in

surrounding

disturbances

plate, and

this

and

after

is

lowered

of

sound

sensitivity.

The

special

the

microphone

back

but

traveling

Phase

further

other

factors
by

.

the

the

plate

plate

each

.

is 14~

The

plate

front
ring
are in-

is

The

unidirectional

in

front

of

areas. Beautiful

is

thus

possible

microphone

converts

sensitivity

vibrating

sound

A' is a

shift
increased

the

. In

other

constructed

are

this

unidirectional

to

plate

is

shown

B.

component

around

of

A,

and

at

damper. Therefore, the

B'

ring

after

face

of

this

phase, and

. In

this

as

shown

20

dB

(5~

it

only

and

.
receives
mechanical

microphone

frontal

.

in Fig.

B'. Now, A

the

plate

due

to

by

will

this

acoustical

the

same

strike

passing

the

vibrating

case,

phases

vibrations

manner, the

to

be

in

Fig. 13.

10

times) showing

microphone

non-sensitive

sound

sounds

12.

will

which

ring,

difference

impedance

time, sound

the

through

plate

almost

recording

waves

vibration

is so

exclusive

Let's

call

strike

the

will

strike

as

m~ch

effect

vibratin

the

after

of B and

on

the

acoustical

free

from

The

ratio

is

in

g

a

35

MIC JA

CK

LINE

OUTPUT JACK 1

EXT. SP. JACK

CONTROLS

REWIND

TAPE

COUNTER~:-:-~-

TONE CONTROL

ON-OFF SWITCH--t---,:..,

-~-

RELL

f

e; ...

-=--,

RADIO JACK LINE

HEAD COVER

SHAFT

'"

. · :· I• s j

CAPSTAN

I

OUTPUT JACK 2

RELL SHAFT

SE

.,

LECT

OR

VOLUME CONTROL 1

VO

LUME CHANNEL SELECTOR

CONTROL 2 RECORDING BUTTON

PILOT

LEVEL

AC SOCKET

LAM

P PRESSURE ROLL

INDI

CA

TER

ER

36

OPERATIONAL TABLE

Recording

Play

back

, Play

back

Play

back
channel
(CH, )
(

Play

back

track 1 or

Play

back
channel
(CH,)
(Play

back

track 3 or

Play

back
channel
(CH,.

2)

(

Play

back
taneously
track
track

4, 2

simultaneously

Stereo
of

stereo

Channel

from

1

from

4)

from

2

from

2)

from

1, 2

simul

from

1, 3

or

)

reproduction

recorded

-

tape

Position

Function

Selector

FORWARD

FORWARD

FORWARD

FORWARD

of

Knob

Selector

Channel
(CH, ) (

Channel
(

DOUBLE

DOUBLE

Position

Channel

CH

)

2

of

Knob

1

2

Volume

I

Volume

VOLUME

Volume

(

VOLUME

For
Volume
For
Volume

For
Volume
For
Volume

Control

Control

-I )

Control

-I )

channel

Control

channel

Control

channel

Control

channel

Control

1,

2,

1,

2,

1

1

2

1

2

Layout

of

Jacks

00
00

00
00

00
00

00

o•

When
connect

•

In

this

will

be

When
connect

•

In

this

will

be

When
connect

•

In

this
channel 1 and
simultaneously.

The

Using
connect

0

radio
for

stereo

listening

it

case,

silent.

listening

it

case,

silent

listening

it

case,

speaker

auxiliary

e.

or

other

Remarks

with

to

e.

speaker

with

to

e.

speaker

.

with

to

e.

sounds

2 can be

will

be

cord

.

to

either

amplifier

reproduction

earphone,

earphone

earphone

in

heard

silent.

.

,

,

Rec

ording

Recording
1 (

CH
Earphone
from
(CH,)

Recording
channel
(CH
Earphone
reproduction 1 from
channel
(CH,)

)

1

channel

,)

on

channel

reproduction

2 FORWARD .

on

2

1

Press

recording

button

"REC"

then

Press

recording

button

"REC
then
FORWARD

Press

recording

button

"REC", is
then
FORWARD.

Channel
(CH,)

,

Channel

", (CH,)

DOUBLE In

1

For

recording,
Volume
For
Volume

2

For
Volume

For

Volume

Control

reproducing,

Control

recording

Control

reproducing

Control

these

cases

not

possible

1

2

,

1

,

2

recording

,
.

· ®

0 0

e @

O ©

While
by

0

to
possible
connect
Recording
by

While
by

0

to
possible
connecting
Recording
by

recording

connecting

e,

reproduction

from

ing

can

connecting

recording

connecting

e,

reproduction

from

can

connecting

on

microphone

channe

earphone

be

monitored

earphone

on

microphone

channel

earphone

be

monitored

earphone

channel

is

l 2

by

to

@.

to

channel

is

1 by

to

@.

to

1

®·

2

@.

37

BLOCK DIAGRAM

MICRO

PHO

NE

ERASE

HEAD

~;L

LINE

OS

SELECTOR
SWITC

IN

O

UTJ

2

POWER AMP

or OSCILLATOR

REC

PL

AY

s'

0

PLAY

REC.

°20

REC

.

EXT .

SP

VOLTAG

E

AMP

rL

AY

12AX7(+)

VOLTAGE

AMP

12A X

7(+

HI

GH

FREQUENCY
COMPENSATOR

HI

GH

FREQUE

)

:OMPENSATOR

NCY

LO

W
FLEQUEN
COMPENSA

LO

W
FREQUENCY
COMPE

NSA

TOR

CY

TOR

VOLUM
CONTROL

VOLUM
C

ONTROL

E

E

VOLTAGE

AMP

VOLTAGE

AMP

12

AX7(+)

VOLTAGE

LINE

AMP

OUT

L-OJ

SPEAK

ER

HI

GH

FLEQUEN

CY

REC

S,

0

H

COMPENSATOR

CIRCUIT DIAGRAM TRA-505

RECORD .ANO

PLAY.

HEAD

,,

"

H2

,'

/1,'

Rn

L

___

____________

1

_ _

___

_ _____ I _________

S I ROTA RY

V,., 12AX7

_,'

_________

_

TCH

_i

SWI

_ _

________

v, .•

68MB

V

68MB

3.8

TZ

"

EXT .

Sf'EN<ER

JA

CI(

'"

'·

"'

,

I

_,_,,

____

__ /

SLIDE SWITCH

C,o

10

__

:'

-c

i,

m

'

/ _:

_____

_,

1

_ / _

52

Ral 3 .

JK

u ov

'5

38

REPLACEMENT PARTS

Symbol
No.
CAPACITORS

C 1
C 2
C 3

4

C
C 5
C

6
7

C
C 8
C 9
C

10
C 11
C

12
C

13
C

14
C

15
C

16
C

17
C

18
C

19
C

20
C

21
C 22
C

23
C

24
C

25
C

26
C

27
C

28
C

29
C

30
C 31
C

32
SVC 1

RESISTORS

R 1

R

2
R 3
R 4
R 5
R

6
R 7

R

8

R 9

R

10
R 11
R 12
R 13
R

14

R 15
R 16

R 17
R

18
R 19
R

20
R 21
R

22
R

23
R

24
R

25
R

26
R

27
R

28
R

29
R

30
R 31
R

32

Stock
No

.
: R

215521
215521
215521
215521
233044
233044
214579
214579
258516
258516
215521
215521
215073
258005
214521
225001
214021
258557
257016
257016
214521
215529
233814
215525
258557
258557
258011
258557
214529
275111
275111
232405
283087

:

122538
122441
123281
133537
133537
133525
122537
122541
122541
122376
122
122537
133525
133529
122521
133522
122521
122540
122369
122521
133533
122372
125302
133531
125308
133521
133450
125380
133445
122449
122540
133450

Description

Paper
Paper
Paper
Paper
Ceramic
Ceramic cylin
Paper
Paper
Electrolyti
Electrolyt
Paper
Paper
Paper
Electrolyt
Paper
Styrol
Paper
Electrolyti
Electrolyti
Electrolyti
Paper
Paper
Ceramic cylindric
Paper
Electrolyti
Elec
Electr
Elec
Paper
Myler
Myler
Ceramic cyl
Semi-Variab

Composition, filmy
Composition, filmy
Composition, filmy
Composition
Composition
Composition
Composition, filmy
Composition, film
Composition, fil
Composition, filmy
Composition,

376

Composition, filmy
Compos
Composition
Composition, filmy
Composition
Compositio
Co
Composition, film
Composition, film

Composition

Composition, filmy 4. 7kn K
Composition,
Composition
Composition, filmy
Composition
Composition
Composition,
Composition
Composition, filmy
Composition, filmy
Composition

cylindric

trolyti

olyt

trolyti

iti

mposition, filmy

O.OlµF M

0.0lpF M

0.0lµF M

0.0lµF M
330pF

dric

c

ic

ic

c
c 3pF
c

c
c

ic

c

indri

c

le

y

my

filmy

on

n,

filmy

y
y

film

y

filmy

330p

0.0047

0.0047
lO
101,F K

O.OlµF M
O.OlµF

0.015
lO

O.OOlµF M

O.OlpF K

0.00l
lO

O.OOlµF M

0.047

330

0.

022

lO
lO

lO

lO

0.

0047

0.011,F (M)

0.0lµF (M )
30pF

lOOpF

470k

lOk
100

2.2M

2.

2Mn
220kn
220k
270k
270k

1.8k!1

l.8k
220kn
220kn
470k
100k
120kn

lOOk n K RO¼L

180k

l.

2kn

lOOkn

!Mn

390!1

680kn

820!1

J:00kn

56k

3.3k
22k
15k

180k

56k

400WV
400WV
400WV
400WV

50WV

K

F

K 50WV
µF K
pF K
µF

µF K
µF

µF M
µF

3µF

µF M
µF K
µF M
µF
µF
µF
µF
µF M

n K RO¼L
n
!1
n K RC½BE

n
n K
n K

n K

n
!1

!1

n K RC½ BE
n K
n
n
n K RO¼L
n K

400WV
400WV

K

M

K

3WV

3WV
400WV
400WV
400WV

25

WV
400WV
500WV
400WV
350WV
350WV
350

WV
400WV
400WV
500WV
400WV
350WV
350WV
350

WV

400WV

500WV

RO ¼ L

K
K RO½L

K RC½ BE

K

RC½ BE

K

RO ¼ L J ,
RD

¼L

RD

¼L J,

K

RO ¼ L
RD

¼L

K

RO¼ L

K

RC½BE

K RC½BE
K

RO ¼L

K RC½BE

K RO¼L
K

RO ¼L

K

RO ¼L

K

RC½BE
RO ¼L

K

ROIL

K RC½BE
K

ROIL

K

RC½ BE

RDlL

K RC½BE SP ,

K

RD

¼L

RC½ BE

Symbol
No

.

33

R

34

R

35

R

36

VR 1
VR 2
VR 3
VR 4
VR 5
VR 6

TUBES; Vacuum

V 1
V2
V3

Diode-Germaniums

0 1
0 2
0 3
04

Silicon

SIR
SIR 2

TRANSFOMER

T 1
T2
T3

MISCELLANEOUS

LM

,

J

,,

s,

S2

1

J,

Stock
No

126293
122281
133533
133533

153032
153032
156049

156049
159023
159011

12AX7A

12AX7A

6BM8

575001

575001

575001

575001

Rectifier

552006

552006

411016

453065

313033

514201

541042

594004

542132

533082

591005

544402

544384

544404

543082

543083

543172
635593

531106

532135

541208

541211

596044
852030

592038

593276
593283
593233
611142

513259

513096
944259
944049

542152

5

14114

526115
968039
958147
968312

.

Description

Compos

ition,
Composition, filmy
Composition
Composition

Variable
Variable
Twin
Twin

Adjustable
Adjustable

1N34A
1N34A
1N34A
1N34A

1S3

14

1S314

Power

Output

Oscillator

Level mater
Lamp
Pil

ot

Power source
Push
Fu

se

2

pole
4 pole
6

pole
Jack (with
Jack (with
Jack with switch
Jack

Rotary
Slide
9

pole

9

pole

Rubber
Eyelet
Crystal
Splici

Power
Power

Extension cord

Bru

sh
Record/play
Erase
Muting switch
wafer
Plug
HVA

-6
Speaker
Rubber
M

ic-box

Function

filmy

Carbon

Carbon
Variable
Variable

soc

ket

lamp

button

collar

ng

for

socket

switch

terminal
terminal plate
terminal

red

point

white

switch

switch

socket

for

soc

ket

for

cushion

earphone

tape

sourse

cord (for

sourse cord (

for

head cleani

head

head

socket

change

induction

leg

cover

selector

assembly

for change

assembly

plate

plate

mark

point

miniature
miniature

for

of volt
motor

knob

)

mark

230V
120V

ng

of

age

assembly

470

!1

K

100!1 K RO¼L

lMn

K RC½BE

lMn

K RC½BE

500kn

(A)

500kn

(A)

500kn

(A)

500kn

(B)

·

lOOkn

(B)

500

!1

(B)

)

tube

tube (with

)

U.L)

voltage

clamp

assembly

R02L

)

39

Symbol
No.

SP

1

Stock
No.

968131
619681
619850
968166
968227
646403
958067
948449

944005
944146
948154
944263
638825
630020
630347
948169
948035
948058
948045
971003
971002
638850
948455
637445
636553
639912
638858
971028
638821
637443
944009
944087
944088
630375
645587
630370
940570
715416
940059
697517
968009
968217
960018
960021
968091
968239
968255

Description

Head

cover
Channel
Volume
Push
Pad
Cover
Push
Brake
Tape
Tape
Tape
Function
Rewind
Muting
Clip
Take-up
Capstan
Take-up
Rewind
Motor
Motor
Collar
Counter
"E"
Rewind
Capstan
Belt
Belt
Pressure

"E"
Collar
Motor
Motor
Rewind
Washer
Oil
Jack
3 mmif,x 16
3 mmif,x
Uni-directional
Handle
Case
Hinge
Hinge
Speaker
Pannel

Case

button

cover

cushion

button

lever
guide
guide
guide

ring

ring

holding
rubber

ring

ring

pully
pully

cap

name

assembly

holding

assembly

cover

selector

control

assembly

selector

roller

pully
washer
base

reel

belt

washer

collar

roller

collar

mm

12

mm

assembly

grill

knob

knob

felt

assembly

(L )

(R)
spring

cam

washer

base

assembly

rubber

cushion

for

50c

for

60c

plate

screw (for

Truss

dynamic

metal

assembly

assembly

assembly

/s
/s

screw (for

microphone

pannel

)

pannel

)

40