Nakamichi CR-2 Bedienungsanleitung

Andere Handbücher für CR-2

3

Dieses Handbuch passt für folgende Modelle

3

Andere Nakamichi Kassettenspieler Handbücher

Nakamichi

Nakamichi CR-2 Bedienungsanleitung

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Nakamichi BX-125E Bedienungsanleitung

Nakamichi

Nakamichi 700ZXL Bedienungsanleitung

Nakamichi

Nakamichi BX-300 Bedienungsanleitung

Nakamichi

Nakamichi BX-1 Bedienungsanleitung

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Nakamichi CR-7 Bedienungsanleitung

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Nakamichi LX-5 Bedienungsanleitung

Nakamichi

Nakamichi BX-2 Bedienungsanleitung

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Nakamichi CR-4 Bedienungsanleitung

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Nakamichi DRAGON Bedienungsanleitung

Nakamichi

Nakamichi BX-300E Bedienungsanleitung

Nakamichi

Nakamichi 500 Bedienungsanleitung

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Nakamichi 1000ZXL Bedienungsanleitung

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Nakamichi CR-2 Bedienungsanleitung

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Nakamichi 481 Bedienungsanleitung

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Nakamichi 480 Bedienungsanleitung

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Nakamichi 700ZXL Bedienungsanleitung

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Nakamichi BX-125 Bedienungsanleitung

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Nakamichi 480 Bedienungsanleitung

Nakamichi

Nakamichi CR-2 Bedienungsanleitung

Nakamichi

Nakamichi BX-2 Bedienungsanleitung

Nakamichi

Nakamichi BX-2 Bedienungsanleitung

Nakamichi

Nakamichi RX-505E Bedienungsanleitung

Nakamichi

Nakamichi RX-202E Bedienungsanleitung

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Philips

Philips AW 7300 Bedienungsanleitung

Philips

Philips Video Cassette Recorder Bedienungsanleitung

Yamaha

Yamaha MT8X Bedienungsanleitung

Manta

Manta MA408 Bedienungsanleitung

Sherwood

Sherwood Newcastle D-480 Bedienungsanleitung

Tascam

Tascam 122MKIII Leitfaden

GPO

GPO W0162B Bedienungsanleitung

Sony

Sony HST-471 Bedienungsanleitung

Sharp

Sharp JC-AV1 Bedienungsanleitung

Pioneer

Pioneer CT-W103 Bedienungsanleitung

Aiwa

Aiwa HS-JX899 Bedienungsanleitung

Sony

Sony TC-K615S Bedienungsanleitung

Sony

Sony CFS-B15 - Am/fm Stereo Cassette Recorder Bedienungsanleitung

Sony

Sony WMFS220 - Portable Sports AM/FM Cassette... Bedienungsanleitung

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Aiwa HS-TA21 Bedienungsanleitung

Sanyo

Sanyo MCD-ZX700F Bedienungsanleitung

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Aiwa CS-P77 Bedienungsanleitung

Service

Manual

Nakamichi

Nakamichi

CONTENTS

Ne

mo

Se

10.

11.

12.

pe

1.1.

General

6

is2c6%,

Siecearad

oki

tirade

enersed

gabon

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ba

Matis

PULA

WRAN

Ge

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Beat

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Pe

ai

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one

the

1

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Procedures

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3

2

21.

Top

Cover

Ass’y

and

Bottom

Cover

Ass’y

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ee

ee

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3

2.

(2.

Cassette.Case:

Cover

ASS’

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joing

p85

a

o-2

Ms

aap

ee)

shield

ac

80.

kG

8

Pada

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Sid

ow

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eet

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ee

3

2.

3.

Mechainism:

Ags)

ys.

525

02:

eta

deck

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ta,

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ae

Rice

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nd

MOPS

Sr

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ate

ee

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dees

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ace

Be

3

2.0

A;

Pin

Jack

P.C.B,

Ass’y

and

Main

P.C.B.

Ass’y

2.0...

ee

tee

ee

ee

nee

3

2. 5.

Front:Panel

5520-930

sae

psee:

hana

avis,

ig

ae

dpe

lateiere

Gok

HR

Buelavel

w

FG

RVR

we

Bw

ee

ee

ees

4

2. 6.

Bias

Tune

Volume

P.C.B.

Ass’y

2...

0.

ee

ee

ete

eee

eee

ae

4

25°

Ts

Control:

PC

IBM

Assy.

iccats

Seg

Pid

tase

so

ia

ies

Blea

olay

Oh,

Bae

ee

Oe

Re

RN

ay

al

tos

sca

cee

echo

det

4

2.

8.

Power

Switch

dome:

ais écsc.

soe

ob

aco.

dyer

eile

6

as

ale.

hive

dudes

SB

Gebel

Doteea!

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and

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ha

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5

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Adjustments

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5

4.

1.

Tape

Guide

Height

Check

for

Record/Playback

Head

and

Erase

Head

...............000004

5

4,

Head

Base

Stroke

Check

1...

0...

0.

cece

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5

4.

3

Record/Playback

Head

Azimuth

Alignment

and

Height

Check

.............0.0

0000

eeeeee

5

4,

4

Pressure

Adjustment

of

Pressure

Roller...

0...

ee

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4,

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4.

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Damper

Adjustment

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cc

cc

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ee

eee

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eee

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6

4.

7

Reel

Motor

Speed

Adjustment

in

Play

Mode

.......0.

0.0.00

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ence

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6

4,

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Speed:

Adjustment:

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lactase

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h8

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5,

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Spe

Sat

eh

ends

ane

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adi

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6

4. 9.

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6

Parts

Location

for

Electrical

Adjustment...

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Electrical

Adjustments

2.

3

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Gave

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he

8

Mechanism

Ass’y

and

Parts

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1.

DY

NUNSIS:.

4.4

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cd

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faves

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Chassis:

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(A010),

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3,

Bottom:

Cover

:Ass’y:

(A02)

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trig

a

GS

seas

Saw

Bahn

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oo

Scale

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7

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Mechanism

‘Ass’y

(B01):

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2-4

¢

66

sees

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6.

Front

Escutcheon

Ass’y

(B02)

2.0...

2...

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14

Mounting

Diagrams

and

Parts

List

..

2.0.0...

2.

ec

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ee

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nn

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15

8

1.

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15

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3.

Input

Volume

P.C.B,

Ass’y

2...

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cc

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15

8

4

Output:

Volume’

P;C.B,

Ass’

Yo

55

96s

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ere,

8

New

Ga

voces

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16

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Headphone

P.C.B.

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16

8.

6.

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Tune

Volume

P.C.B,

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16

82

1%

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16

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Control

P-C-Bs

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17

Schematic:

Diagram...

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d05

6b

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8%

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24

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26

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26

11.

2.

Mechanism

Control

Section

.

2...

0...

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27

Timing

Charts

and

Eq.

Amp.

Frequency

Response

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29

SDECHICATIONS:

|

5.4).55.56

ete.

Bidet

ered

co

Weg

Saw

acs

dy

oa

ete

on

By

oqec

Ble’

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APD

a

0,

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pea

we

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oad

be

ot

380

GENERAL

Voltage

Selector

Voltage

selector

is

installed

on

the

rear

panel

for

Other

version

of

the

Nakamichi

CR-2.

This

voitage

selector

can

select

110,

127,

220,

or

240

V

at

customer’s

disposal.

1.2.

Schematic

Ref.

No,

Part

No.

Package

Ass*y

and

Accessory

Ass’y

Description

Fig.

1

Schematic

Ref.

No.

Description

01

OF04070A

OF04071A

OF

04072A

OF04100A

02

OF

04087C

03

OF

04088C

04

OF03684A

0D04046A

0D04047A

OM03457A

OM05101A

OM05070A

0OM05054A

OM05087A

OM05106A

OM05105A

OM05107A

OM05108A

0M05102A

0M05103A

Package

Ass’y

Carton

Box

(CR-2)

Caxton

Box

(CR-2A)

Carton

Box

(CR-2E)

Carton

Box

(CR-20)

Packing

L

Packing

R

Poly-Sheet

S

Warranty

Card

(CR-20)

User’s

Pack

(CR-20)

Voltage

Label

240V

(CR-2

(Australia)

&

CR

2E

(UK))

Voltage

Label

(CR-2

(Saudi

Arabia))

Serial

No,

Label

(CR-2A)

Serial

No.

Label

(CR-2,

CR-2E

&

CR-20)

Point

of

Sale

Label

(CR-20)

UL

Label

(CR-2A)

LA

Label

(CR-2A)

Canada

Label

(CR-2A)

UL/Canada

Label

(CR-2A)

Shipping

Label

Los

(CR-2A)

Shipping

Label

VAN

(CR-2A)

BRE

REE

BN

N

NEBR

RRR

eRe

Oe

0D03092B

0D04449A

0D04810A

O0D04766A

0D04780B

0D04781B

0D04785B

OD04796A

OD04795A

ODO04797A

0D04812A

0M03844B

DA04121A

Accessory

Ass’y

Poly-Bag

Important

Notice

(CR-2,

CR-2E

&

CR-20)

Important

Notice

(CR-2A)

General

Catalogue

(CR-2A)

Owner’s

Manual

(English/

German/French)

Owner’s

Manual

(Japanese)

Price

Card

(CR-20)

Tape

Catalogue

(CR-2A)

Tape

Catalogue

(CR-20)

Warranty

Card

(CR-2A)

Tape

Supplement

Power

Cord

Label

(CR-2E

(UK))

Pin

Cord

Ass’y

ee

Rte

Ft

fed

bd et

ee

2.

REMOVAL

PROCEDURES

2.1.

Top

Cover

Ass’y

and

Bottom

Cover

Ass’y

Refer

to

Fig.

2.1.

(1)

Loosen

FO1

and

remove

F02

(Top

Cover

Ass’y).

(2)

Loosen

F03

and

remove

F04

(Bottom

Cover

Ass’y).

2.2.

Fig.

2.1

Cassette

Case

Cover

Ass’y

Refer

to

Fig,

2,2,

ql)

(2)

Press

FO1

(Eject

Button)

to

open

FOQ2

(Cassette

Case

Cover

Ass’y).

Pull

FO2

(Cassette

Case

Cover

Ass’y)

upward,

Fig,

2.2

2.3.

Mechanism

Ass*y

Refer

to

Fig.

2.3.

ql)

(2)

(3)

Remove

the

Top

Cover

Ass’y

and

the

Bottom

Cover

Ass’y

referring

to

item

2.1.

Remove

the

Cassette

Case

Cover

Ass’y

referring

to

item

2.2.

Loosen

FO1

and

FO2,

remove

FO3,

and

disassemble

F04

(Mechanism

Ass’y).

Fig.

2.3

2.4,

Pin

Jack

P.C.B.

Ass’y

and

Main

P.C.B.

Ass’y

Refer

to

Fig.

2.4.

(1)

Remove

the

Top

Cover

Ass’y

and

the

Bottom

Cover

Ass’y

referring

to

item

2,1.

(2)

Loosen

FO1

and

remove

FO2

(Pin

Jack

P.C.B.

Ass’y).

(3)

Loosen

F083

and

FO4,

and

lift

FO5

(Main

P.C.B.

Ass’y).

Note:

When

installing

the

Main

P.C.B.

Ass’y,

to

facilitate

installation,

place

the

Main

P.C.B.

Ass’y

so

that

the

tops

of

switches

on

the

Main

P.C.B.

Ass’y

come

in

contact

with

the

ends

of

push

buttons

as

shown

in

Fig,

2.5.

Fig.

2.4

Fig.

2.5

2.5.

Front

Panel

2.7,

Control

P.C.B.

Ass’y

Refer

to

Fig.

2.6.

Refer

to

Fig.

2.8.

(1)

Remove

the

Top

Cover

Ass’y

and

the

Bottom

Cover

Ass’y

(1)

Remove

the

Top

Cover

Ass’y

and

the

Bottom

Cover

Ass’y

referring

to

item

2.1.

referring

to

item

2.1.

(2)

Remove

the

Cassette

Case

Cover

Ass’y

referring

to

item

2.2.

(2)

Remove

the

Mechanism

Ass’y

referring

to

item

2.3.

(3)

Pull

out

FO1,

FO2

and

FO3,

and

loosen

F04

and

F05,

(3)

Remove

the

Front

Panel

referring

to

item

2,5,

(4)

With

pushing

claws

by

hand

as

shown

in

the

figure,

remove

(4)

Loosen

FO1

and

F0O2

with

a

special

nut

driver

or

with

pliers

F06

(Front

Panel).

(5)

to

set

FO3

(Bias

Tune

Volume

P.C.B.

Ass’y)

free.

With

pushing

FO3

(Bias

Tune

Volume

P.C.B.

Ass’y)

in

the

direction

of

the

arrow,

loosen

F04,

unhook

F05,

and

remove

FO6

(Control

P.C.B.

Ass’y).

Fig.

2.8

2.6.

Bias

Tune

Volume

P.C.B,

Ass’y

2.8.

Power

Switch

Joint

Refer

to

Fig,

2.7,

Refer

to

Fig,

2,9.

(1)

Remove

the

Top

Cover

Ass’y

and

the

Bottom

Cover

Ass’y

(1)

Remove

the

Top

Cover

Ass’y

referring

to

item

2,1,

referring

to

item

2.1.

(2)

Pull

FO1

(Power

Switch

Joint)

upward

to

remove

it,

(2)

Remove

the

Main

P.C.B.

Ass’y

referring

to

item

2.4,

(3)

Remove

the

Front

Panel

referring

to

item

2.5.

(4)

Loosen

FO1

and

F02

with

a

special

nut

driver

or

with

pliers,

and

remove

F03

(Bias

Tune

Volume

P.C.B.

Ass’y).

Main

PC.8.Assy

Fig.

2.9

3.

TEST

TAPES

AND

GAUGES

(1)

400

Hz

Level

Tape

(DA09005B)

(2)

1kHz

Track

Alignment

Tape

(DA09007B)

(3)

10kHz

PB

Frequency

Response

Tape

(DA09003B)

(4)

15

kHz

PB

Frequency

Response

Tape

(DA09002B)

(5)

20

kHz

PB

Frequency

Response

Tape

(DA09001B)

(6)

15

kHz

Azimuth

Tape

(DA09004B)

(7)

3kHz

Speed

and

Wow/Flutter

Tape

(DA09006C)

(8)

Tape

Travelling

Cassette

(DA09071A)

(9)

Reference

EXII

Tape

(DA09111A)

(10)

Reference

SX

Tape

(DA09110A)

(11)

Reference

ZX

Tape

(DA09109A)

(12)

Head

Alignment

Gauge

(DA09092B)

(13)

Torque

Gauge

FWD

(DA09082A)

4,

MECHANICAL

ADJUSTMENTS

4.1.

Tape

Guide

Height

Check

for

Record/Playback

Head

and

Erase

Head

With

use

of

a

Head

Alignment

Gauge

(DA09092B),

tape

guide

height

check

for

the

Record/Playback

and

Erase

Heads

shall

be

made,

wherein

a

small

block

shall

be

pushed

straight

down

to

the

base

while

in

use

of

the

Head

Alignment

Gauge

(DA09092B),

Refer

to

Fig.

4,1.

(1)

Record/Playback

Head

Tape

Guide

Height

(a)

Load

the

base

of

the

Head

Alignment

Gauge

(DA09092B)

carefully

and

set

the

cassette

deck

in

Play

mode,

(b)

Piace

the

small

block

of

the

Head

Alignment

Gauge

(DAO-

9092B)

on

the

base,

:

(ec)

Slide

the

smali

block

against

the

tape

guide

of

the

Record/

Playback

Head,

and

check

to

insure

that

the

block

is

accepted

by

the

tape

guide,

(a)

If

not,

loosen

the

screw

and

insert

a

shim

(either

30

um

(0C80048A),

60

wm

(0C80038A),

or

100

um

(0C80039A))

to

raise

the

Record/Playback

Head,

then

tighten

and

apply

a

quantity

of

lock

tight

paint

to

the

screw.

(2)

Erase

Head

Tape

Guide

Height

(a)

Load

the

base

of

the

Head

Alignment

Gauge

(DA09092B)

carefully

and

set

the

cassette

deck

in

Play

mode,

(b)

Place

the

small

block

of

the

Head

Alignment

Gauge

(DA09092B)

on

the

base.

(c)

Slide

the

small

block

against

the

tape

guide

of

the

Erase

Head,

and

check

whether

the

block

is

accepted

by

the

tape

guide,

4.2.

Head

Base

Stroke

Check

Refer

to

Fig.

4.2.

(1)

Load

the

base

of

the

Head

Alignment

Gauge

(DA09092B)

carefully,

then

push

the

base

toward

the

Record/Playback

Head

to

eliminate

the

clearance

between

the

reference

pin

and

the

base,

(2)

Setthe

cassette

deck

in

Play

mode,

(3)

Piace

the

small

block

of

the

Head

Alignment

Gauge

(DAO-

9092B)

on

the

base.

(4)

Contact

the

small

block

with

the

Record/Playback

Head

surface

and

the

Erase

Head

surface,

and

check

whether

the

end

of

the

small

block

is

located

within

the

specified

toler-

ance

as

shown

in

Fig.

4.2.

4.3.

Record/Playback

Head

Azimuth

Alignment

and

Height

Check

Refer

to

Fig.

4.1.

(1)

Contact

an

AC

voltmeter

to

the

Output

Jacks.

(2)

Load

a

15

kHz

Azimuth

Tape

(DA09004B)

and

set

the

cassette

deck

in

Play

mode,

(3)

Tur

the

Azimuth

Alignment

Screw

until

the

outputs

of

both

channels

become

maximum.

(4)

Load

a

1

kHz

Track

Alignment

Tape

(DA09007B)

and

set

the

cassette

deck

in

Play

mode.

(5)

Check

to

insure

that

the

readings

of

both

channels

on

the

AC

voltmeter

are

below

—25

dB.

If

not,

replacement

of

the

Record/Playback

Head

will

be

required.

(6)

Apply

a

quantity

of

lock

tight

paint

to

the

Azimuth

Align-

ment

Screw.

Alignment

Alignment

Gauge

Gauge

4.4.

Pressure

Adjustment

of

Pressure

Roller

Refer

to

Fig.

4.3,

(1)

In

Play

mode,

measure

the

torque

of

the

Pressure

Roller

and

check

whether

the

torque

is

in

a

range

of

320

+50

g-cm,

(2)

If

torque

is

out

of

the

range,

correct

it

by

changing

the

instal-

lation

point

of

the

Pressure

Rolier

Spring.

4.5,

Tape

Travelling

Check

Load

a

Tape

Travelling

Cassette

(DA09071A)

and

set

the

cassette

deck

in

Play

mode

to

check

the

followings:

(1)

After

more

than

2

seconds,

the

fluctuation

of

the

tape

travel-

ling

on

the

Record

/Playback

Head

is

small,

(2)

Tape

isin

contact

with

the

head

sufficiently.

(3)

Tape

waving

is

small

on

the

heads

and

pressure

roller.

4.6.

Eject

Damper

Adjustment

Refer

to

Fig,

4.4.

Load

a

cassette

tape,

and

with

opening

the

Cassette

Case

by

pressing

the

Eject

button

and

closing

it

by

hand,

adjust

the

speed

of

damper

action

by

the

Damper

Adjustment

Screw,

CCW:

Damper

moves

fast,

CW:

Damper

moves

slowly.

4.7,

Reel

Motor

Speed

Adjustment

in

Play

Mode

(1)

Load

a

Torque

Gauge

FWD

(DA09082A)

and

set

the

cassette

deck

in

Play

mode.

(2)

After

5

to

10

seconds,

adjust

VR601

on

the

Main

P.C.B.

Ass’y

to

obtain

exactly

45

g-cm

on

the

torque

gauge,

4.8.

Tape

Speed

Adjustment

Refer

to

Fig,

4.5.

(1)

Connect

a

frequency

counter

to

the

Output

Jacks,

(2)

Load

a8

kHz

Speed

and

Wow/Flutter

Tape

(DA09006C)

and

play

it

back,

(3)

Adjust

the

Tape

Speed

Adjustment

Volume

incorporated

in

the

Capstan

Motor

to

obtain

3,000

Hz

on

the

frequency

couter,

CCW:

Motor

drives

slowly.

CW:

Motor

drives

fast.

4.9.

Lubrication

The

tape

transport

is

of

a

lubrication-free

type

mechanism,

When

the

following

parts

are

replaced,

apply

the

specified

lubricant,

(1)

Molykote

(R)

Grease

(X5-6020)

Cam

Motor

Pulley

Thrust

portion

on

the

Capstan

Shaft

(2)

FLOIL

GB-TS-1

Washer

between

Reel

Hub

Ass’y

and

Back

Tension

Spring

(3)

Diamond

Oil

(EP-56)

Reel

Hub

Shaft

(4)

Anderol

456

Capstan

Shaft

Note:

We

suggest

that

you

use

the

above

specified

lubricant

or

equivalent

type.

The

company

dealing

in

the

above

lubricant

is

as

follows:

(a)

Molykote

(R)

Grease

(X5-6020)

Dowcorning

Co.,

Ltd.,

1-15-1

Nishishinbashi,

Minato-

ku,

Tokyo,

Japan

(b)

FLOIL

GB-TS-1

Kanto

Chemicals

Co.,

Ltd.,

2-7

Kanda

Sakuma-cho,

Chiyoda-ku,

Tokyo,

Japan

(c)

Diamond

Oil

(EP-56)

Mitsubishi

Oil

Co.,

Ltd.,

1-2-4

Toranomon,

Minato-ku,

Tokyo,

Japan

(d)

Anderol

456

Toyo

Kokusai

Oil

Co.,

Ltd.,

3-3-5

Hatchobori,

Chuo-

ku,

Tokyo,

Japan

Fig.

4.3

Increase

Damper

Adjustment

Screw

Decrease

N

Increase

Capstan

Motor

on

Fig.

4.5

PARTS

LOCATION

FOR

ELECTRICAL

ADJUSTMENT

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Fig.

5

6.

ELECTRICAL

ADJUSTMENTS

Set

the

CR-2/2A/2E/20

as

shown

in

MODE.

Balance

-

Center

Bias

Tune

—

Center

Eq.

-

70

us

Tape

-

ZX

MPX

Filter

-

OFF

Dolby

NR

-

OFF

Playback

1.

Play

back

a

Torque

Gauge

FWD,

and

after

5

to

10

seconds,

adjust

VR601

to

obtain

44

+

1

g-cm

on

the

Torque

Gauge

at

25

degrees

(45

+

1

g-cm

at

20

degrees).

2.

Check

that

the

deviation

of

the

torque

value

is

within

+10

g-cm

of

the

center

value.

Note:

Torque

adjustment

must

be

done

after

leaving

the

CR-2/2A/2E/20

for

one

hour

with

the

power

switch

turned

OFF.

Reel

Motor

Speed

Adjustment

(Play)

Gauge

FWD

(DA09082A)

Tape

Speed

Frequency

|

Playback

Tape

Adjust

the

volume

incorporated

in

the

Adjustment

|Speed

Counter

to]

Eq.

-

70

ps

Speed

capstan

motor

to

obtain

3

kHz

+15

Hz

on

and

Wow/

Output

Adj.

the

frequency

counter,

Flutter

Jacks

Volume

Tape

(Capstan

(DA09006C)

Motor)

Record,

Pause

1.

Feed

in

400

Hz

and

adjust

the

Input

Level

control

to

obtain

500

mV

-1.2

dB

on

the

AC

voltmeter.

2.

Adjust

VR101

(VR201)

so

that

the

0

dB

segment

of

the

level

meter

starts

illuminating.

Meter

Level

Calibration

Record,

Pause

MPX

-

OFF/ON

MPX

Filter

Adjustment

1.

Adjust

the

Input

Level

control

to

obtain

500

mV

(0

dB)

on

the

AC

voltmeter.

2.

Set

the

MPX

Filter switch

to

ON

and

adjust

L101

(L201)

to

obtain

minimum

reading

on

the

AC

voltmeter

(minimum

reading

will

be

less

than

-30

dB).

Record/

15

kHz

AC

Volt-

Playback

Record/

|Adjust

the

Record/Playback

Head

Azimuth

Playback

Azimuth

meter

to

Eq.

-

70

ps

Playback|Alignment

Screw

to

obtain

maximum

Head

Tape

Output

Dolby

NR

-

Head

readings

for

both

channels

on

the

AC

Azimuth

(DA09004B)

|

Jacks

OFF

Azimuth

jvoltmeter.

Alignment

MPX

~-

OFF

Align-

ment

Screw

Playback

400

Hz

AC

Volt-

Same

as

Adjust

VR102

(VR202)

to

obtain

500

mV

on

Level

Level

Tape|meter

to

above

the

AC

voltmeter,

7

Jacks

Calibration]

(DA09005B)

|

Output

Playback

Frequency

Response

Adjustment

Bias

Oscillation

Frequency

and

Erase

Current

Adjustment

Level

Tape/meter

to

(DA09005B)

|

Output

10

kHz

PB

|Jacks

Frequency

Response

Tape

(DA09003B)

15

kHz

PB

Frequency

Response

Tape

(DA090028B)

20

kHz

PB

Frequency

Response

Tape

(DA090018B)

Frequency

Counter

between’

terminals

1

and

2

of

CN2

on

Main

P.C.B.

across

the

additional

0.1

ohm

resistor

None

AC

Volt-

Playback

Eq.

-

70

ps

Dolby

NR

-

OFF

MPX

-

OFF

Record,

Pause

|

Main

Eq.

-

70

ps

Tape

ZX

Dolby

NR

-

OFF

MPX

-

OFF

1.

Load

a

400

Hz

level

tape,

play

it

back,

and

read

the

playback

level.

Load

10

kHz,

15

kHz

and

20

kHz

PB

frequency

response

tapes

and

play

them

back.

Adjust

the

record/play-

back head

azimuth

to

obtain

maximum

readings

for

both

channels

on

the

AC

voltmeter

with

each

tape.

Check

that

the

playback

levels

are

as

follows

with

respect

to

the

level

for

400

Hz

level

tape.

10

kHz:

-20

dB

-2

to

+2

dB

15

kHz:

-20

dB

-2

to

+3

dB

20

kHz:

-20

dB

-2

to

+4

dB

If

the

level

at

20

kHz

is

out

of

the

range,

adjust

VR106

(VR206)

to

obtain

satisfactory

results.

VR106

(VR206)

compensates

the

playback

frequency

response

at

20

kHz

as

shown

below:

|

Approx.

5d8

10K

20K

Conduct

step

6

"Record/Playback

Head

Azimuth

Alignment",

Connect

an

additional

0.1

ohm

resistor

in

series

to

the

Erase

Head

and

connect

the

AC

voltmeter

across

it,

Adjust

T301

to

obtain

105

kHz

+1

kHz

on

the

frequency

counter.

If

bias

oscillation

frequency

is

above

106

kHz,

short-circuit

C317

and

C318,

and

re-adjust

T301

again.

Adjust

VR304

to

obtain

17.5

mV

(175

mA)

on

the

AC

voltmeter.

(16.5

+

1

mV

(165

+

10

mA

will

be

accepted.)

After

completion

of

the

erase

current

adjustment,

re-check

the

bias

oscillation

frequency.

Remove

the

additional

0.1

ohm

resistor.

Bias

Trap

Adjustment

(Record

Amp.)

Adjust

L103

(L203)

to

obtain

minimum

(remove

meter

to

reading

on

the

AC

voltmeter.

input

TP101,TP201

signals)

on

Main

P.C.B.