Commodore 1515, 1525 Technical Manual

PIN 990450

Commodore
Graphic Printer

Technical

Manual

Model

1515/1525

Manual

e::

commodore

COMPUTER

These documents are for repair service information only. Part numbers are

for

reference

only. Only parts on current dealer parts list are available. No license

is

given

for

any use by

possession of these documents and may not

be

reproduced

in

any form

withoutthe

written

approval

of

Commodore Electronics Limited.

CONTENTS

I.

SPECI

FICATIONS

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

2

II. CONSTRUCTION

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

5

1.

SUMMARY ................................................................................................................................. 5

2.

PRINTING ................................................................................................................................. 7

3.

LIN8FEED ................................................................................................................................

10

4.

CIRCUIT .....................................................................................................................................

12

5.

TIMING DIAGRAM ...................................................................................................................

14

III.

REPAIRING LEVEL

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

17

IV. MEASURING INSTRUMENTS AND TOOLS

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

17

V. MAINTENANCE

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

18

1.

CLEANING ................................................................................................................................ 18

2.

LUBRICATING ........................................................................................................................... 18

VI.

DISASSEMBLY AND REASSEMBLY

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

19

1.

UPPER

CASE

............................................................................................................................. 19

2.

LOWER

CASE

BLOCK AND MACHINE ASSEMBLy ..............................................................

20

3.

LOWER

CASE

BLOCK ..............................................................................................................

23

4.

CONTROL

PCB

UNIT AND LAMP

PCB

UNIT

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

26

5. PRINT HEAD

UNIT

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

27

6.

LINEFEED MECHANISM ..........................................................................................................

28

7.

FEED DRUM AND CARRIER

UNIT

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

29

8.

GEAR TRAIN ................................................................................................................. ,..........

32

9.

TRACTOR ........................................................................................................................ ..........

34

VII.

TROUBLESHOOTING.................................................................................................................... 35

1

I.

SPECIFICATIONS

1. General Specifications

• Print method ................................... Impact dot-matrix print

(SEI

KOSHA's uni-liammer

method)

• Print format .................................... 5 x 7 dot-matrix

• Charactors

• Graphics .•........................................

• Character

Codes

• Character

size

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

upper/lower

case

characters,

nu-

rreric

s~ols,

&

Pet

graphics

Dot

addressable.

7 vertical dots per column

8-bit

codes

(Vi

c-20

,C-64

codes)

Height: 7 dots (2.82 mm)

Width: 5 dots (1.76 mm)

• Print

Speed

.............................. ........ 30 characters/sec. (left

to

right, uni-d irectional)

• Maximum Columns .......................... 80 columns

• Character Spacing ........................... 12 characters/inch

(10

charcters/

inch

on

1525)

• linefeed Spacing ............................. 6 lines/inch .............. Character mode

9 lines/inch .............. Graphic mode

• linefeed

Speed

................................ 5 lines/sec ................. Character mode

7.5 lines/sec ............. Graphic mode

•

Paper

Feed

...................................... Pin

feed

•

Paper

Width . ........... ........................ 4.5

to

8 inches acceptable

(10

inches

on

1525)

• Number

of

Copies ........................... Up

to

3 copies including orig.

• Inked Ribbon .................................. Inked roller built-in

cassette

type, single color

• Dimensions ..................................... 132 x 328 x 172.5 mm

(1525;

23LOx420Nx13lH)

• Weight ............................................. Approx. 2.5

kg

(1525;

4.:3<g)

2. Environment

• Power Requirements

• Power Consumption ...................... .

• Temperature .................................... .

• Humidity ....................................... .

117 VAC±'IO%,

50/60 Hz

for

USA )/60

Hz

for

Europe

15 watts max. (character printing)

(1525;

200)

5 watts (idling)

(1525;

BN)

5°C

to

4Q°C

20%

to

80% (non-condensing)

2

3.

Features

and

Codes

3.1

Main features

• Double width character

output

under software control.

• Graphics capability (picture

and

graph output capabilities).

• In the graphic mode, a graphic

data

pattern

can

be

repeated

as

many times

as

you want

with a single command.

• Print position

addressable

by character or

dot

column (positioning control).

• Graphic, character

and

double width character

modes

can

be intermixed on a single line.

• Automatic printing.

When

the

text

exceeds

the maximum line length

no

data

is

lost due

to

overflow.

• Self-test printing

is

available.

3.2 Printing

modes

• Character mode

• Double width character mode

• Graphic mode

3.3 Control

codes

• N L (O,A) Line

feed

after printing

•

CR

(0,0) Line

feed

or

no

line

feed

after printing (jumper selectable,

see

below)

• DC4 (1,4) No line feed after printing
(The

above

three

codes

are

print

commands)

•

BS

(0,8) Graphic mode command

•

SO

(O,E) Double width character mode command

•

SI

(O,F)

Character mode command

•

pas

(1,0) Print start position

addressing

•

ESC

(l,B)

When

followed by the

pas

code

it

is

used

to

specify a start position

according

to

the

dot

address

•

FS

(l,C)

Repeat

graphic select command

3

CURSOl

UP MODE Code Table

0

010

0 0 ! 0

I 0 I

0 1

,

1

I

1

I

1 , 1

I

1 !

1 I 1

, .

I

I

-----+-

0

01

0

I

0 1

I

1 I 1

I

1

0 0

I

0

i

o

II!

1 I

1 I

1

i

I

i

0

0

I

1

I

1 0 I 0

I

1 !

1 0 0

I

1 i 1

!

0

i

0

I

III

I

0 I 1 I 0

I

1 0 i 1

,

0 I 1 0 1

,

0

1

I 0

I

1

!

0

I

1

I

,

I

,

l

07 I 06

I

D51

04 I 03 : 02 i 01 . DO

i

I

0

;

1

:

2 I

3

I

4

I

5

I

6

,

7

8 9 A

B

,

C

0

E

:

F

,

,

0 i 0

,

0 i 0

I

0

POS;

SP:

IJ

I

@i

PiE

0:

SP

~ ,

:'

. 0 '

sP:

[21

,

i 0

0

0

i

1 , 1

(IN'~

·

I

1

I

A

,

Q '

.,

~

l,0:':

[J

:x::

•

•

[J

a:i

,

,

(ll'\~',

I

I,;'

I

I

0 ; 0

1

i

0 2

svs

·

2

I

B

R .

r;

n

REV

~

-,

I

II

.~

I

O~

, , ,

"""

OFF

•

I

...

I

0 0 1 1 3

;

3

r

C

S.

~

~

:r

••

"-:1:

,

-,

,

,

!

I!

~

I

,

I

I

T:

~

0:

::J

C r--.Il

=._U

~

0 1

0

0

4

S i

4

D,

I 0

,

1 , 0 , 1

,

5

I

t}o

:

5

I

E

U!LJ'Ld

C_t=

C

:2

o [:

I 0

,

1

1

0 i 6

I

!

&!

6

I

F

v·

Q

~'

I

]

;-

~

~

CL

,

;

~

i

1 I 1 i 1

I

7

j

1~~WiIJ

u~~L:fn

c

l:l

u~[Ji

I

1

i

0

,

0 I 0

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8 BS

:(18

HIX![]

~!

m -

[]

~.;Di

I

I

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I ~ :

r:]i-.

t;

1 I 0 I 0

I

1

I

9

,

I

9 I

,

Y

n'r:

[]r"!

I

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:

..

,

1

o j

1 i 0 !

A

NL

SLll:

•

J I

z

I~!~i

:0

o :

~

,

'+l

! 0

;]1

1

I

o I

1 )

1

I

B

ESCj

+

;

I

KI

[ I

~

I

Eli

i

.

ICE

1J';r

a:J:

[]

,

L!

!

L.J

I,'

I

1

1

I

0

I

0

I

C

I

<

LI

T 1

0

:

(]

I

,

:[1

~'CIJ![i:"1

I

I,

,

I'

1 j 0

;[5

,

m~

1

I

1

I

D

CR

,

-I

=

N

) i

~!~!

0]1

"::11'

,

i

,-i

1 S

,OJ

[5

I

L!~

I

1

i

1

I

1

i

0 I

E SO

I I

)

O!

,il

~i:ZGlI!:L'1Il1

,

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T : 0 i

If

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1r

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,

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-i

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51

:

,

p:

Ii

!iI

,[

~:

r , ,-.

,

I • :

-

-

~i

-

CURSOL

DOWN

MODE

Code Table

0

I

0 I 0 0 j

0 0

0

I

o t

1

1

i

1

I

1

I

1

I

1 1

,

1

1

i

,

,

01

0

I

I

I

I

!

I

0

0

I

1

1

1

1

I

0

,

0 0 0

I

1

1

,

1

0

I

0

i

1

1

,

0 0 1

1

i

0

i

0

1 1

I

01

0

1

I

1

I

I

I

I

i

,

I

,

,

0

1 0

1 0 1 ! 0

1 I 0

,

1

0 1

011

o I

1

I

,

I

I

07 i 06 I 05 i 04

03 : 02 : 01 : 00

I

It

1

I

2

3

I

4

5

,

7 I I

i

9

A 8

:

C

I

0 E

I

F

,

,

0 I 0

0

i

o I

0

,POS·

SP

II

I

(!.

p

.6:

pi

I

SP'

Gi

P

SP:

[2

,

0

I

0 0 ! 1

I

1

tYR;:".

,

1

I

•

II

:

A

I

QI

':l,~~,

[J

L

~

~

A

!

Q i

[]

;:I; i

;VJ~

~

,

,

L........i

I

0 i

0

1 0

i

2

svs

~

2

I

b

r

B!

R

It

..

:v"'--r-~~

B

!

R

I.

"

;

!

0:-;'

OFF

.~tr_

.

::r:

'

0

i

0

1

1 I

3

I

I

;:

3

,

c $

c

I

5

LO~,

E[

c

s

IO;:i

I

I

~

0

1 0 0

I

4

,

si

4 d

t

Oi

T

'DO:

Dr

TiO,D

,

0 1

0

1 S

90

I

5

~

u

E

I

t'

.

10

[JI

E

i

u

10

[J'

;

0 1 1

0

6

,

lJ,;

6

f

\-

t-

\.

I

1.,

[]

i

F

I

V

EiJ

I

,

i

,

:

~

1

v;

i

DID!

Gjw

DiU:

0

,

1 1 1

i

7

I

' ,

7

,

c

,..

G

,

I

i

,

~

!

ii

I u I

I

1

0

0

0

8

BS:

1

(

I

•

,

h

It

H

I X i

i

HIX

m~

I

,

,

,

1

I

0

0 1 9

)

9

I

i

I

).

!

I

yl

i

~I~!

' I

f&'

~

,

I

10

lal

I : Y , • :

1

1

•

1

0

A

:\L

:5Lll

•

j

)

z

I

J

Z

liZ

D:.ai

1

I

0

!

1

,

1

1

B

:ESCI

+

k I

[

I K

iii

~

[E

lJ

KIE8

[]:iJJ

I

; ,

1 1

i

0 0

c

<

J

,

¥I

L

(]i

:

[J

~

L

II]

[il~i

·

I

i

-

J

l M

[]i

rs

E!l

~I

I []

[!jitJi

I 1

,

0

i

1

0

CR

-

=

mi

I

,

1 1 1

I

•

E

50

)

•

!

T

,

N

g'

I

@

~

~!~IEili[]!

;

I

i

1 1 I 1

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1 F SI

/

•

0

!

.-1

0

~i

i

IlJ!~

OI~ICJI~'

,

4

II.

CONSTRUCTION

1. SUMMARY

Figure 1 shows the block diagram and Figure 2

is a flowchart

showing the sequence

of

its

motion.

I

nput

data

Control

PCB

unit

,--------

I

I

I

I

I

I

L

__

_

.---L..-..... Print mechanism

Figure 1

5

117VAC,

220 VAC,

or

240

VAC

I

I

-

-1-

- - -

-I

I

I

I

I

I

I

I

_______

J

Line-

'--_---'

feed

OUTPUT THE STATUS

OF

"NOT

BUSY"

NO

YES

OUTPUT THE STATUS

OF

"BUSY"

NO

WRITE THE INPUT

DATA

ON

BUFFER

NO

YES

YES

Figure 2

6

PRINT OUT THE

DATA

IN BUFFER

2.

PRINTING

(1) PRINTING MECHANISM

This Printer

is

based

on a single

printing

hammer system which

is

quite unique and

different

from

other

impact

dot

printing systems. The timing

of

hammer printing depends upon revolution

of

the rotation

detector. This revolution, rightward movement

of

the hammer and the revolution

of

the platen

are

synchronized. Character and graphics dots

are

printed when the relative positions

of

the hammer head

and

the platen

are

encountered. The relationship

of

the hammer, the platen and the

dot

sensor

is

shown

in

Figure

3;

that

of

the hammer head, printed

dot,

and signals

of

the

dot

sensor in Figure 4

VIEW POINT

FROM®

PART®

HAMMER HEAD
HAS A

SLOPE

8

AGAINST RIDGES

P

3

---4-+-+f----

P

2

B7~~~~",---,----

PI---~--~-

/

Figure 3

DETAI

LS

OF

PART ®

..

25.4/12-...,.

b

OI

ao
a

..

a2
a3

a4

as

a6

a7

a8

a9

bo

.----

I

-E
E

-N

m

-

N

I

~

l

I
I

I

iE-l.76

__

I.

,.

,.

--II"

~

~.

". ".

ii~

~

I

II

PLATEN 10

rps

(Revolutions

of

motor

are

reduced

to 1/6

by

reduction

gear)

Has

evenly divided

18

ridges

PI,

P

2

, ••••• ,

P

I8

FEED DRUM

UNIT

CLUTCH

(d)

REDUCTION GEAR

ROTATION DETECTOR

(

Fixed

to

motor shaft)

60 rps

-+-1+- DISTANCE

BE

TWEEN

DOTS

!

~AMIM~R

HE1~

,-1-8

T

I.,

"-

zt

-1

N

wen

~

Ww

•

I

~

~g

;::::J

I~

;::::J

w-

.~

ma::

~

wei:'

'"""=l

u-

ZZ

;::::::J

c(w

I

.".

,.

1-1-

'---

enc(

-...I

c,*Q.

PLATEN 1 REVOLUTION (O.ls)
Hammer

moves

6.35 mm (1/4 inch,

during 3 characters printing

SLOPE

OF

HAMMER

8

=tan~

p

7

(2)

CARRIER

UNIT

MOVEMENT AND RIBBON FEEDING

Figure 5

shows

rightward movement

of

the carrier

unit

and

ribbon feeding due

to

motor revolutions.

Figure 6

describes

the carrier unit's return

to

the home position, activated by the H solenoid.

PRINT DIRECTION OF RIBBON MOVEMENT
HEAD

UNIT

RIBBON CAM

RIBBON FEED BOARD

RIBBON CAM

R'::tt

Ribbon

is

fed

in

the arrow direction when

ribbon

is

caught between ribbon

cam

and

ribbon

feed

board.

When

carrier

unit

returns leftward,

ribbon

is

not caught.

SPRING

RIBB~NI

~

\

FEED BOARD RIBBON

Figure

5

CONSTRUCTION

OF

H

SOLENOID AND CLUTCH

m CLUTCH

H SOLENOID;l (JAW CLUTCH)

'j

,

---J<1 / .

! ,

When

H solenoid

is

pulled, the clutch

is

released

and

the carrier

unit

returns

to

the leftmost home

position forced by the recovery spring.

CARRIER

UNIT

AND PRINT HEAD'

UNIT

1/1/1111

//11

1111/111

1/1"

11//11/11/""

1111/11111111111111111111111111

IIlIllIllllIIl/lIIlII

1/111/111

1111/

, ---'---------'

RECOVERY SPRING

Figure 6

8

(3)

HAMMER DRIVE

(PIN

DRIVE) FLOWCHART

NO

RESET

PIN CNT

SHIFT PIN-REG

RIGHT BY

ONE

FIRST 0

CHARACTER PATTERN

"A"

OT

0

,0

0

-

~

0 0
0

0

0

0

0

0

0

0

0

0

0

r--'r'0

0

SEVENTH DOT

~

) PIN-REG

NO

PIN

DATA

REG

= 1

NO

YES

HEAD COIL

ABOUT

290

p.s

"ON"

PIN

CNT =

PIN

CNT+1

END

Figure 7

9

PIN

DATA

REG

IO~D

)

FIRST DOT

PIN CNT: A counter

for

pne column

(7

dots)

of

a character pattenl.

PIN-REG: A register storing one column

(7

dots)

of

a character pattern.

DOT

SNS:

Timing

signal

for

each

dot.

PIN

DATA

REG:

One

bit

register

for a dot

to

be

printed.

3. LINEFEED

(1)

LlNEFEED

MECHANISM

Figure 8

shows

the linefeed (paper feed) controlled by the motion

of

the LF solenoid. The LF solenoid

is

activated three times

for

printing characters

and

two

times for printing graphics.

The transmission

sequence

of

a LF solenoid motion

is:

LF

r----

CLAW WHEEL

f--------

LF CLAW

f-------+

GEAR

f-------.

TRACTOR

I---

TRACTOR

SOLENOID

UNIT

WHEEL

PIN

SHAFT

The condition

of

the claw wheel

unit

when the LF solenoid

is

inactive

is:

i)

The claw wheel

unit

is

pulled

by

the LF rope spring.

iil

The

saw

teeth

of

the LF claw wheel and the

saw

teeth which

are

pushed

by

the claw wheel

spring

are

coupled.

REVERSE

STOP

CLAW

EARTH PLATE

(Ll

LF SOLENOID

LF

ROPE

CLAW LF CLAW EARTH

LF

CLAW

WHEEL STOPPER PLATE

(Ll

WHEEL

UNIT

.CLAW WHEEL SPRING

LF

ROPE

SPRING

LF SOLENOID

Figure 8

10

(2)

LlNEFEED

FLOWCHART

LENEFEED

LFCNT = 3

LFCNT=
LFCNT

-1

YES

END

NO

LFCNT: COUNTS THE NUMBER

OF

LlNEFEED

k'~~~:/~Zb~G

I I I

II

r-

--~I_-_--_·~~S~~~~O'D"ON"

I

~

~

. LF SOLENOID

"OFF"

~

33ms

33

ms

Figure 9

11

~

N

eN

I

ADDRESS/TEST

SWITCH

RAI-I

I

':~--------------T,~~~e

~~

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Vee

I~RAH

Sfto.03

GND~

C3""'-

C8

Vee

11_-f

10H

II

.,JT

(NOTE)

Aa

A.

RESISTOR

VAlUES

ARE

IN

(kQ]

UNLESS

OTHERWISE

SPECIFIED.

CONDENSER

VALUES

ARE

IN

(PF]

UNLESS

OTHERWISE

SPECIFIED.

*1.*2

WITH

HEAT

SINK.

2732 -

CONNECT

J I •

J.

2332

-CONNECT

J2.

J3

'E=:

w

~~Ol~~~

*"~YE

-::;t

-

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12~3

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........

(LS

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L--I>lIP~

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a.

RI.

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(2W>

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RD

CN8

HEADa..umt

WH

I)

CN9

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CNIO

I t£ADaIl

vee-----<D~~L-

~

~OR~ERLA~

0.3

SlR~o

BlU

~

* J 1

0

;:

r

'0

1.2'

cn~u,

tt~)

..

I'

+

PA780SC

~~

+

1*

I

(6.~

__

_

D.

HZ6C2

CNIl

+>.1

• r.,...

lYE

••

J • ___

u'.

.

...

__

._..

,-----",)

CNI'

Figure

10

~

•

o

-

:l:J

o

c:

-

~

~

'-I

LED~III

II

II

n,.IIII.

r~1I

II

___

PH

II

II-Orange

Jumper

White

1it-lJ

II

I~BlueJU-

Yellow

Red

II

1I11--White

Red

R7

II

IlcON'I/

II

R9

RA

..

C6

Ilbuuu

u~l'4

~'7

~

TP30

e:Eq)

~8

C19'

-~

....

o

,,"

~-~!~~f1~~'"';A;""1

~

cloIO~9ga~~aa~J

PI

P2

i~UUCI4

~R5

11000

oouou

'IRAI

RI7ce:::p

~

[::~:::]

C}::]

[:::~::]

05

E

1'-"-"-"-"-:~~o-"-"-"-"-'l~::](::'J:]

®f::

:~:~l

[;;;

;;ii:

;:;:

;;:;:

]Q,

[El]

CONI

R3

RA2

.rIIXI

=

11

6

ouuuuJf.2J~~~

• SWl : GP-SOA

only

Figure 11

w

-

n

g

....

.,

Q

-

C9

III

n

c

3

~

c

;:,

(1)

;::,

....

<

....

(1)

~

811~11~11

Q31111il1.JI.IIIIAIr'l1l

'o21111111.l11

111111

o

5.

liMING

DIAGRAM

(1)

Initializing motion

'"

__

---------------------------------+5v

~---------------------OV

t

Vee

POWER

ON

~---------------------------+5V

RESET

(Pb/4~,.....,

I

____

J

--.I

about - - - -

~-

about

~

-----J

- I 66

ms

66

ms

I

HONE

(?I/I2.)

~

______

- __ - -

__

- - ___ I

Figure

12

When

power

is

applied,

or

the~signal

is

input

to'P2/l,2

[No.1

and

No.2

teriminals

of

IC

P2],

the

CPU

(P6/4)

accepts

the

RESET

signal,

the

CPU

is

reset

as

long

as

this

signal

is

LOW,

or

about

2V

or

less.

The

CPU

activates

as

soon

as

it

rises

from

LOW

to

HIGH.

First,

the

CPU

makes

the

HCsignal

(P8/9)

LOW

turning

on

the

drivers

(P7/l3,14).

When

they

are

on,

the H solenoid

is

~ved

to

the

head

carrier

return

to

the

home

positon

forced

by

the

recovery

spring.

The

HOME

signal

(Pl/12),

which

is

shaped

from

the

output

signal

of

the

home

sensor,

is

HIGE

the

head

carrier

is

at

the

home

position

and

is

LOW

when

out

of

the

home

posit1L~.

The

CPU

checks

the

HOME

signal

to

see

whether

it

is

HIGH

or

LOW.

If

it

18

HIGH,

the

CPU

will

~e

the

He

signal

HIGH

66

ms

later;

if

it

is

LOW.

the

CPU

waits

until

it

becomes

HIGH

and

66

.s

later

the

CPU

will

make

the

KG

signal

IIICH.

When

the

Hc

signal

becomes

HIGH

turning

the

drivers

(P7/l3,14)

OFF

(HIGH),

the

head

carrier

has

returned

to

the

home

position

with

completion

of

the H solenoid

motion.

Next

is

to

move

the

h~Jcarrier

to

the

aiddle

of

paper

and

back

to

the

home

posi

tion

in

order

to

check.

and

memoril,e

the

timing

of

rising

edge

of

the

HOME

signal

relatively

compared

with

the

DOT

signal.

This

timing

will

be

used

as

the

criterion

for

the

CPU

to

decide

when

to

start

printing.

With

the

abave

procedure,

the

printer

finishes

the

init~li

ing

motion

and

can

accept

input

data

from

this

moment.

Input

and

output

of

the

printer

are

conducted

through

VIC

ser_ial

bus.

14

(2)

Start

of the printing motions

MOTOR

(pg/S") I

--f

about-----------------------------------------

160

ms

t--

He

(P8/9)

I

[

HOME (PI/IZ)

First dQt of Fiest

dot

of

dot

position 0

dot

position 1

j4--

5.56

ms---l

--..,;---

...... ~ ..

2 3 4 5 6 7 1 2 3 4

~OT

(P3/8)

nnnnnnn

nn

___

---<5fj~uuuu~~:

: : :

..

: : :

PI

N

(~P-S~/J-3

~)

---

580

Il

S

1.9

ms

----t'=t~~~~~

Figure

13

First column

of

pattern

"A"

\-

..

Second column

When

printing

starts,

the

CPU

makes

the

MOT

(P8/S)

andHC

signal

LOW.

Lowering

of

the

MOT

signal

makes

the

drivers

(P7/l5,16)

LOW

supplying

current

to

the

motor

to

race.

Since

the

H C

signal

is

also

LOW.

'the H solenoid

is

activated

to

relieve

the

motor

shaft

from

the

head

carrier

for

about

.160

ms

so

that

the

.ator

can

reach

constant

speed

of

revolution.

TheFfC

signal

is

raised

to

HIGH

engaging

the

motor

shaft

and

the

head

carrier

to

move

it

to

the

rightward

direction.

In

case

there

is

no

or

abnormal

output

from

the

dot

sensor,

the

CPU

turns

theHC

and

lUYr

signals

HIGH

and

halts

to

do

nothing

because

aechanical

error

must

have

occurred.

Next,

the

CPU

waits

and

sees

if

tho

printhead

leaves

the

home

position

via

the

HOME

signal

(Pl/12).

After

confirming

that

the

HOME

signal

becomes

LOW

which

means

the

head

carrier

gets

out

of

the

home

positi~."

the

CPU

goes

to

check

the

DOT

signal

(P3/8)

in

order

to

decide

when

to

start

printing.

The

DOT

signal

is a shaped

output

signal

of

the

dot

sensor

and a group

of

27

seruential

pulses

repeats

at a constant

interval.

The

rising

edge

of

the

DOT

signal

following

the

comparatively

long

duration

of

staying

LOW

(1.9

ms)

is

the

timing

to

start

printing.

When

this

signal

rises

from

LOW

to

HIGH

after

staying

LOW

for

.are

than

640~s,

the

CPU

takes

it

as

a'timing

to

start

printing

and

jumps

to

the

hammer

drive

routine.

In

case

of

printing

one

dot,

the

~lN

signal

(PB/13)

of

the

hammer

drive

pulse

which

is

synchronized

with

the

DOT

signal

is

made

LOW

for

about

290;Ms.

Lowering

of

t~e

PIN

signal

..

kes

the

driver

(P7/IO)

LOW,

turns

the

transistor

(Ql)

ON

and

drives

the

hammer. The

27

pulses

consist

of

three

7-dot

columns

as

shown

below.

15

, U

>OO"'~>UI~)

(I/(,lJO)f!Ii~~1t!')

Z.J

fJ'1""

""4/~~~"'7/"'.~'O»~:JI'»~'

~

( 2

f'\cl

Col~n)

When

the

HOME

signal

falls

down.

the

CPU

starts

counting

the

number

of

dot

pulses

until

the

DOT

signal

stays

LOW

for

long

(about

1.

9

ms).

The

CPU

uses

the

counted

number

to

compare

with

the

number

"stored

at

the

initialization

in

order

to

decide

when

to

start

printing

correctly.

The

HOME

and

DOT

signals

can

be

checked

through

test

pins

(TPl,TP2).

(3) Recovery

motion

Hc(PJ/,)

HOHE

(P

102)

~}=4C(f8/11

)

(

· •

·

·

I

Ibout

--.{

66

ms~

I

Figure

14

The

CPU

lIakes

the

liST

signal

HIGH

and

the

rc

signal

LOW

after

printing

a

live.

With

this.

the

.ator

stops

revolving

and

the

head

carrier

returns

to

the

hoae

position

forced

by

the

recovery

spring.

If a recovery

.otion

includes

a

line

feed,

the

output

of

LFC

signal

(P8/l1)

follows.

While

this

signal

is

LOW.

the

drivers

(P5/ll.l2)

are

also

LOW

activating

the

Ll

solenoid

for

1inefeed

by

1/18

Dnch.

After

1inefeed,

the

CPU

waits

until

the

HOME

silna1

returns

HIGH.

When

tPe

head

carrier

returns

to

the

home

position

and

the

HOME

signal

becomes

HIGH,

the

C

signal

is

raised

to

HIGH

about

66

lIS

later'

ending

the

recovery

.otion

of

the

head

carrier.

16

ID.

REPAIRING

LEVEL

Follow

the

sequence below

to

repair

and

adjust

the

Printer.

CD

Remove

if

an interface

is

attached.

W Proceed

the

repair according

to

the

repairing levels

(!y

or

(5"

described below.

Level

®:

Disassembly, replacing parts, reassembly and

adjustment

of

eat.1l

mechanism.

Replacing parts

of

control

PCB

unit. - (Sophisticated repair)

Level

®:

Replacing blocks including simple parts replacement. Replacing and adjusting the
print

head. - (Simple repair)

Level

'll;

and

.Jt

are used

in

the

following chapters

to

indicate a level

of

repairing methods.

IV.

MEASURING

INSTRUMENTS

AND

TOOLS

The following items are necessary

to

repair or adjust

the

Printer.

1. Oscilloscope

This

is

used

to

adjust

the

position

of

the

home

sensor unit, or

in

other

words,

to

adjust

the

alignment

of

the printing

start

position. It

is

also used

to

check

the

control ,PCB unit.

2. Multimeter (VOM)

3. Print head adjusting tools

.

Figure

15

®

@

~)

is

used

to

hook a spril"YJ

to

the

print head

unit

and

.,~.

is

used

to

drive

the

head ajdusting

nut

and

the

nut.

If

these

tools

are

not

available,

use non-magnetic material tools.

4. Tools (screwdriver, tweezers, pliers and nippers)

5. Soldering iron (For electronic parts)

6. Desoldering tool

17

v.

MAINTENANCE

1. CLEANING

Due

to Its material,

each

part

has

its own proper cleaning liquid

and

method.

It

should

be

noted that

if

an

improper cleaning liquid

is

used

or cleaning method

is

poor, parts may

be

damaged

or may

not

function

properly. Follow the instructions

in

Table 4

to

clean.

It

is

helpful

to

use

a hair drier

to

dry. But

if

the

cleaning liquid

is

flammable, take

care

to

keep

it

away from the hair drier.

Table

4

PARTS

CLEANING

CLEANING DRYING

REMARKS

METHOD

OIL

METHOD

Metal parts

Brush washing

Benzine

Of

Warm

air
trichloro­ethylene

Plastic parts

of

the

Brush washing

Benzine

Cool air

Do not

use

any oil other

mechanisms

than designated

one.

Wash

quickly, wipe

with

a cloth

and

dry

rapidly.

Use

good, clean oil.

Plastic parts

of

the

-

-

-

Wipe

off

dirt.

enclosure

Rubber parts

-

-

-

Wipe

off

dirt.

Electric parts

Do not

wash

Wipe

off

dirt

with

a

[PCB

u.,

Motor

cloth

with

benzine

or

H solenoid u.,

alcohol.

LF solenoid u.,

Dot

sensor

u.,

Home

sensor

u., etc.

-

-

Print

head

u.,

Carrier

u.

Rope parts

Do not

wash

Do

not

wipe

or

touch

I

Feed

drum

u.

the rope.

Head

rope (L)

u.

-

-

Lubricate

with

oil only.

- Claw wheel

u.

2.

LUBRICATING

Use

the following lubricants

in

repairing

and

adjusting the Printer. Portions

needed

to

lubricate

are

described

in

the next chapter, VI DISASSEMBLY

AND

REASSEMBLY.

SF-100

J-5

Screwlock

18

VI.

DISASSEMBLY

AND

REASSEMBLY

If

there

are

two

levels

to

repair, ®

and ® are

used

to

describe the difficulties

of

repairing methods.

To

disassemble,

follow

the

sequences

written in

each

figure

and

follow

the

sequences

in the

reverse

order

to

reassemble.

1. UPPER CASE

1-1

S-36

1-2

1-3

Soundproof cover

S-3~

Tapping

screw

M3 x 16 1

Cover

unit

Upper

case

unit

*

When

attaching 1-3, adjust the position

of

the lamp

PCB

unit

so

that the lamps

are

at the centers

of

the holes.

• Confirming the function

I

S-36-1

Follow the procedures below

to

confirm the functions. Figure

16

1-1

(1)

After

applying power, check whether the power lamp being

lit

and

the printer initialized.

(2) Check whether paper

advances

properly with LF dial.

(3)

Is

ribbon advancing?

(4)

Is

it

possible

to

set

paper properly?

(5)

Check printed characters (wrong printing, character missing

or

smudging).

(6)

Is the aligning

of

the start position

of

printing properly achieved?

(7)

Is

the last column printing possible?

(8)

Is

there any abnormality in character width, height or

space

between characters?

(9) Is there any

dot

missing at upper

or

lower part

of

characters?

(10) Are printed characters vivid?

Is

there any

dirt

caused

by ribbon?

(11) I s the spacing

of

I inefeed proper?

19

2.

LOWER

CASE

BLOCK

AND

MACHINE

ASSEMBLY

2-1

Ribbon

cassette

S-45

Screw

W-42

Spring washer

W-43

Toothed lock washer

2-2

M.

sto p screw

2-3

Lower

case

block

2-4

Machine assembly

®

2-3 2-2*1

Do

not

move the carrier

unit

directly

by

hand. By pulling

~nd

revolving the

clutch on the right

side

counterclock-

wise,

the

carrier

unit

can

be

moved

to

the center.

M4xO.7x5
M4
M4

Figure

17

Part ® setting note

Insert twisted

ends

of

lead

wire

and

make sure

they are not shorted.

U.nplug/plug in

VIl>--'Ht-2-2* 1

Clutch

*1

Before replacing 2-3 and 2-4

with

2-2, the carrier

unit

must

be

moved

to

the center. When setting

2-3

and

2-4,

be

careful

not

to

catch the

lead

wires

or

the recovery spring between 2-3 and 2-4,

and

to

damage

or

to

injure them.

*2

Pay

attention not

to

damage

the flexible cable.

Note: The repair procedures

for

2-3 and 2-4

are

described on

page

23

and

on.

20

• Adjustments

for

printing

Make the following adjustments after setting the ribbon

cassettes

and

paper.

(1)

Adjusting the position

of

the

dot

sensor

Print characters

and

check the darkness

of

the upper

and

the lower part

of

characters.

If

the darkness

is

not equal, adjust the position

of

the

dot

sensor.

E

(a)

......-Light

(b) ...... Upper part

is

light, move

the

dot

sensor

to

right.

E

unit

(c)

...... Lower part

is

light, move

it

to

left.

(b)

E

Black

and

white - -

dot

sense

PH

wire

(c)

(b)

Black

and

red

dot

sense

LED wire

(c)

"Light

Figure

18

(2) Adjusting the printing start position

with

the carrier

unit

and

the home

sensor

i) The

gaps

between the carrier

unit

and

the home

sensor

Gaps A and

B should

be

about 0.5 mm,

with

B smaller than

C.

The

gaps

can

be

adjusted by

twisting oblique line part

of

the earth plate (L).

A

\',\\\

\'

Home

sensor

unit

, Carrier

unit

Figure

19

Earth plate (L)

Black and blue,

home

sense

LED wire

ii) Adjustment

for

aligning the start position

of

printing

(Connect

TP1

and

TP2

of

PCB

unit

to

oscilloscope)

Yellow and black,
home

sense

PH

wire

Adjust the position

of

the home

sensor

unit

so

that the falling-

edge

of

the home

sensor

pulse

can

be

within

the permissible

range

of

the

dot

sensor

pulses.

21

Dot

sensor

Homesensor--------~------~

•

per!issible

range

in which the falling-

edge

of

the home

sensor

should

be.

Figure

20

If

the falling-edge

of

the home

sensor

pulse shifts

to

right ..........

Shift

the home

sensor

unit

to

right.

If

the falling-edge

of

the home

sensor

pulse shifts

to

left ..........••

Shift

the home

sensor

unit

to

left.

(3)

Adjusting the

print

head

unit

i) By using a

print

head

adjusting tool

to

tighten the

head

adjust nut, proper darkness

of

the

printed character

can

be

obtained.

If

there

appears

to

be

smudging,

loosen

it

until smudging

disappears.

ii) Set the

head

adjust lever at the hole

CD.

iii) With a

print

head

adjusting tool, tighten the

nut

so

that the

head

adjust lever could

be

moved

without

too much force. Then lubricate screwlock on the hexagon nut.

~

Hexagon nut

@

CD

~~Head

adjust

lever------J.---:s....

I-=,-----x----...J

@ (f)

I

~Head

adjust

nut

~

® 0

~

Prjnt

head

unit

Figure

21

Note:

As

the

print

head

unit

is

made

of

magnetic metal, do

not

use

magnetized tools

to

adjust .

• Confirming the function

Confirm all the items described

on

page

19

22

3. LOWER CASE BLOCK

Repairing methods

Level

® :

Level

®:

M-01
M-20
S-02
S-43
N-02

Replace a defective part
Replace a part

if

3-6

to

3-8

are

defective. Replace the lower

case

block

if

3-1

to

3-5

or

3-9

are

defective.

Extruded tubing

<1>5

x 0.25 x 12 mm

Splice 35115

Tapping screw

M3 x 12

Tapping screw

M4x

8

Wire band B

5-28

Tapping

screw

M2.6x6

N-02

Hexagon

nut

M2.6xO.45

3-1

Harness (Transformer GND

harness)

3-2 Transformer

*S-37 Screw

with

spring washer M3 x 0.5 x

4.

For

M02

only.

3-3 Sw. stopper
3-4

Power switch

3-5

Cord

bush

3-6

Power cord

3-7

Fuse

holder

*3-8

Fuse

holder washer.

3-9

Connector

cover

plate

unit

3·10

Lower

case

unit

Note: * indicates there

is

a model which does

not

use

this part.

23

•

Harness

diagrom

Black, connect

to

3-6

black

Red,

connect

to

3-6

white

"'-/

O..D------------il,IiI~~~~~~~~~~~~~=~

Blue } To control

To machine assembly

~

Yellow

PCB

unit

~N~2

•

Harness

diagram

~~~U---...).2

Mark

'V

/

""Black,

connect to root of 3·7

Black, connect

to

tip

of

3-7

Figure

21

Black, connect

to

3-6

brown /

Red

'"

connect

to

3-6

blue.

D:J-I-------------il,rFr~~~~~~~~~~~~~;;~

Blue I To control

To machine assembly

= Yellow

PCB

unit

~N-02

https://manualmachine.com/1

3-2

~~~~lL/

3-4

o

a

M-20

o

Red

mark

1\

BI

k

.

f 3 Black, connect

to

root

of

3-7

ac

, connect

to

tiP 0

-7

Figure

22

24

Details

of

part ®

M-02

~i

, !

34

~

""~

3-3

M-02

___

""

c:"

~

.'

'WJ

""5-37

I

N-26

3-10

3-6

I

.

. shows 1525

This figure 23

Figure

I I

'~I

3-9/~

U

S-2S

25

4. CONTROL PCB UNIT AND LAMP PCB UNIT

Repairing methods

S-42

4-1

F-2
F-1

4-3

S-21
W-21
W-24

4-4

4-5

N-01
N-02

Level

®:

Repairing

PCB

unit

or

replacing defective parts. When fixing

PCB

unit,

refer

to

the

circuit diagram (Figure10 ), the

PCB

view (Figure

11)

and the timing diagrams

(Figure 12

-14).

Level

®:

Replacing defective parts

Q9view

*1

Lead

wire setting note

i/

S-21

Tapping screw M4

x'12

S-21~

_____

W-21

Control

PCB

unit

®

W-21---®

®~W-24

Fuse

(1.5A)

I

4-5*2

,

Fuse

(1

A)

,W-24--®

~:

4-4

I nsert twisted

ends

of

'~I/

:

PCB

receptacle

~:

'

lead

wire and make

sure

o ,

, '

Screw M2 x 0.4 x 6

/I~l

they

are

not shorted.

Spring washer M2
Plain washer M2

*2

4-5 attachment

~

Lamp

PCB

unit

E

+~-4.5

a

;1

Lamp
Wire band A
Wire band B

+-

4-1

*1

S-42

Figure 23

26

5. PRINT HEAD UNIT

N-21

W-23

5-1
5-2

5-22
W-23

5-3
5-4
5-5

5-6

5-31

5-7

5-8

Hexagon

nut

(brass) M2 x

0.4

Plain washer M2

(brass)

Head

adjust lever

Head

adjust nut

Screw

(brass)

M2 x 0.4 x 3

Plain washer M2

(brass)

Cable guide

Head

adjust spring

Print

head

unit

Head

spacer

Screw

M3

x 0.5 x 6

Head

board

unit

Head

connector

*2

Be

sure

to

get rid

of

dust, especially iron dust,

from

5-5.

Be

careful not

to

hurt

the flexible
cable. When reassembling, keep pulling the
clutch and revolve

it

counterclockwise

to

move the carrier

unit

to

the center (Refer

to

Figure17)

*3

Barely' tighten 5-2

with

the

print

head

adjust-

ing

tool

(tacking). N-21, W-23 and

5-1

should

be

set

after adjusting the

print

head.

Rubber

leg

Mark

Earth

plate (L)

,........"..,.,.,.~~----..,..Flexible

cable

*1

Removing the hook

of

5-4 using a

print

head

adjusting tool.

___

N-21

II

:--

W-23

~-5-1

$

___

*3

5-2

V-

S

-

22
W-23

~.--5-5

*2

Use

adhesive agent

Lubricate~~

__

J-5

on

top

27

6.

LINEFEED

MECHANISM

Repairing methods

Level

®:

Checking, adjusting

or

replacing parts

Level

®:

Replacing machine assembly except checking, cleaning, lubricating

or

adjust-

ing / replacing

6-1

to

6-3.

6-1

E-40

W-51
6-2
6-3

5-28

5-31

6-4

E-38

6-5

6-6

6-7

6-8

5-32

6-9

E-37

6-10.

6-11

W-61

LF rope spring

E-4o.

ring
Plain washer small M5
Reverse

stop claw

Reverse

stop spring

Screw

M2.6 x

0..45

x 6

Screw

M3 x 0..5

x 6

LF solenoid

unit

BE-37

ring

LF claw wheel

Gear pin

6-9*1

Claw wheel

unit
Claw wheel spring
Screw

M3 x

0..5

x 8

LF

claw stopper

E-37

ring
LF dial
Dial clutch spring
Plain washer small

M6

* 1 6-6 should be in

the

groove

of

6-5.

but

not

in

that

of

6-7.

6-~

6-?J2

6-8

W-51

"

E-4o.

~

~

Lubricate

J-5

~

Figure

25

28

Lubricate

~

~/l

SF-100

~~1~

on

LF rope

~

~

W-61

6-11

J 1

\1\

@~66-1o.

!

~

E-37

I

~fr

* 1 6-4

and

6-9

adjusting method

i) While pushing down part

®

of

6-4,

fix

6-4

with

S-31

at the position where 6-2 falls

from a

tooth

top

of

6-5. The

screw

S-28

should

be

set

to

the direction

as

shown in

the

left

figure.

ii)

While pressing part ®

of

6-4,

fix

6-9

with

S-32 at the position where ® part

of

6-9

and

(i) part

of

6-7

are

coupled

to

stop the

revolution

of

6-7.

iii)

Confirm linefeed functions

by

pressing part

®.

7. FEED DRUM AND CARRIER UNIT

Repairing methods

Level

®:

Checking, adjusting

or

replacing parts

Level

®:

Replacing machine assembly except checking, cleaning, lubricating, adjusting /
replacing 7-2, 7-10, 7-15

and

7-16,

or

adjusting the ribbon feed board.

S-3O

W-32

7-1
7-2

S-29
7-3
7-4
7-5
7-6
7-7
7-8

E-25
7-9
7-10
7-11

N-31
W-31
W-32

7-12
7-13
7-14
7-15

E-24

7-16

Screw M3 x 0.5 x 4
Plain washer small M3
FPC

guide

Recovery spring

Screw M2.6 x 0.45 x 8

Rope spring
Rope stopper

(1

set)

Head

rope (L) unit

Feed

drum

unit

Drum spring

step
Drum spring
BE-24 ring

Pulley pin
Spring pulley

Rope pulley
Hexagon nut M3 x 0.5

Spring washer M3
Plain washer small M3
Guide pillar
Damper

Carrier

unit

Ribbon

cam

spring
E-24 ring
Ribbon

cam

29

Lubrication on 7-10,

7-11

and

the shaft

of

7-6

Lubricate SF-1oo

on the shaft

of

7-6

feed

drum

unit

Lubricate

SF-1

00 on the groove

and

the shaft

of

7-11

rope pulley (4

pes.)

Lubricate SF-1oo on the groove

and

the shaft

of

7-10 spring pulley

(2

pes.)

~

W-32

S-30

I

Lubricate J-5

Figure

26

7-1

'i

E-24

Earth plate (R)

Clutch

(5-29*6

Lubricate

SF-lOa

to

teeth

Lubricate

SF -100

on

head

rope (R)

/

7-6

*4

*1

The

cam

7-16

and

the

bend

of

the ribbon

feed

board must

be

parallel.

If

not parallel, ribbon feeding

may function abnormally. In this

case,

you

can

either

change

7-16 or adjust the

bend

of

the ribbon

feed

board

by

using

pliers

to

fit

the

cam

7-16.

Bend

of

ribbon

~

feed

board

,

Cam

7-16

IfthereiSanyg~

here

replace 7-16 I

*2

When

7-14

is

at the home position, there should

be

gaps

between the home

sensor

(Refer

to

Figure

19.).

*3

Firmly insert 7-12 into the earth plate (R)

and

(L),

and

tighten

with

N-31.

*4

Once

you

have

removed

the

feed

drum unit

7-6,

you must install a

new

one.

A new

one,

which

has

six

winds

of

the

head

rope

(R),

is

fixed by a fixing tool. the fixing tool should

be

taken

off

after

you

have

finished

assembling

with

S-29

screws.

Head

rope

(R~

FiXingt~

Be

careful not

to

let the fixing tool

press

the adhered part

of

the

head

rope (R)

7-6

~~@)

F··

::.---:;

Adhered part

of

IXI~ol

head

rope (R)

Figure

27

*5

Insert the rope stopper 7-4 into the rope spring

7-3.

*6

To

fix

the

head

rope (L)

and

(R)

using

screw

S-29:

j)

Inject

screw

lOck

into the

screw

hole

of

the carrier unit.

ii) Tighten the

screw

S-29

to

the extent that the rings

of

the

head

rope

(R)

and

(L)

can

be

re-

volved.

[screw

5-29

: Do not inject here

~

nject screw lock inside

Screw

S-29

~

Ring

must

be

able

, to

turn

around.

.

Screw

lock should not

"'"

be

overflowed.

Figure

27

Screwlock

*7

Check the following after attaching the recovery spring 7-2.

After

manually pulling

and

revolving the clutch counterclockwise to move the carrier unit to the

'right

end,

check the

gaps

of

the rope stopper 7-4

and

the

adhered

position

and

status

of

the

feed

drum

unit

7-6.

Adhered.

position Should have'rooms

~

.

/ when carrier unit

is

, • . / at the rightmost

end.

i_Should

have

rooms

• ! at the home position

Feed

~rum

Head

rope (R)

Unit

7-6

Should
have

gaps

Figure 34

After

pressing

the H solenoid

to

release

the clutch (Figure 6), check the smooth motion

of

the

carrier

unit,its

return

to

the home position,

and

also

the adhered position

and

its status

of

the

feed

drum

unit

7-6 at the home position.

31

8.

GEAR

TRAIN

Repairing method.

Level

®:

Checking, adjusting

or

replacing parts

Level

®:

Replacing machine assembly except checking, 'Iubricating

or

replacing / adjust-

ing

8-1

and 8-2.

8-1

'5-31

8-2

E-28
8-3
8-4
8-5

8-6
8-7

E-37

8-8

8-9

8-10

E-38

8-11
8-12
8-13

5-26

8-14

5-33

8-15

·1

The way

to

set 8-10

and

8-9.

Ridge'

• Attaching method

of

8-10

Clut.ch moving spring
Screw

M3

x 0.5 x 6

Dot

~nsor

unit

E-28 ring
Clutch step
Clutch
Spring pan
Clutch spring
Clutch

E-37 ring

Reduction

gear
Gear pin
Rot(:ltion detector
BE-37.ring
Reduction

gear
Gear pin
Reduction

gear
Screw M2.6 x 0.45 x 4
H solenoid

Screw

M3

x 0.5 x 5

Motor

Motor

shaft

When a platen ridge

is

at

the

horizontal position, couple 8-10 and 8-13

in

the status

of

a. and

a,

of

8-10 facing the

two

screw holes

of

the earth plate'(R) respectively.

• Attaching method

of

8-9

Fit

the holes

of

8-10 and the

motor

shaft, and then insert 8-9 using pliers.

*2

First, insert

the

M. stop screw

into

the

rubber

leg

(Figure.

17),

and then

fix

8-2

by

5-31. Make

sure there are

gaps

between

the

grooves

of

8-2 and 8-10.

"'"

"'"

'-

'-.....

"

Lubricate SF-l00 on the

saw

~

tooth

part and the tooth

part

of

8-4 and 8-7

*2

8-2

Black and white

Figure

29

8-12

'1

S-31

\

E-38

/8-8

Lubricate SF-l00

to

teeth of 8-13,8-11

and 8-8

9.

TRACTOR

Repairing methods

Level

® : Checking, adjusting

or

replacing parts. Replacing machine assembly

if

earth plate

block

is

defective.

Level

® : Replacing machine assembly except checking, lubricating

or

checking/adjusting/

replacing parts

of

9-1

to.

9-4, 9-9

and

9-10.

9-1

S-32

N-31
W-31
W-32

9-2

9-3

9-4

E-75

9-5

9-6
9-7

9-8

E-60

S-32

9-9
9-10

Screw M3 x 0.5 x 8
Soundproof

Hexagon nut

M3

x 0.5
Spring washer M3
Plain washer small M3
Guide pillar

Paper

holder (L)

unit

Paper

holder (R)

unit
BE-74 ring
Platen bearing (Bearing

for

teactor)

Tractor shaft

Pin

feed

roller
Tractor rubber ring
CE-6 ring
Screw M3 x 0.5 x

8

Home

sensor

unit

Rubber

leg

*1

Push

9-9 outside

as

far

as

it

will

go and

fix

with

S-32.

*2

Assemble the

two

9-7

so

that

the

pins

of

them are facing

each

other.

*3 Check

that

the surface

of

9-6 ©

part

is

smooth

and

has

no

scar.

9-5 9-3

~u~ricateSF-l00

~~E-75

*~/""

,ns,de

"--

~

9-7

1fA.

Screw

loc k

.~

E.aO

~9-2

N-31~

<''-

3

n

'~9-6*3

~

.

~-4

W~3t~

/ I ©

~~

W-32

• .

9-1

~/

9-10

./

Lubricate

SF-1OO

inside

Earth plate block

9-10

VU.

TROUBLESHOOTING

1. The power lamp does not light

START

Proper intitialization

NO

after power on?

YES

Proper contact between

NO Clean contact

or

connector and lamp

lead

reset

at

correct

wire? (Correct position)

position.

YES

YES

Replace power
lamp.

Repair

PCB

unit

35

YES

Insert

power plug.

NO

YES

Replace

it

( F-3)

NO

Contact between
connector and

5 V

lead

wire

defective?

NO

Output

of

5V

defect

ive?

:

NO

..

I

connector

Replace

~--fuse

YES Replace it.

(

~ange

7.5

-13

VAC)

IS

normal.

Replace

PCB

unit

2.

No

initialization

START

H solenoid
moves?

YES

Carrier

unit

returns

to

home position?

YES

Clutch moving

spring OK?

YES

NO

Lubricate
and adjust
position

of

it.

NO

Gaps

between

home

sensor

u.
and carrier u.
abnormal?

NO

Contact between
connector and

LED

or

PH

wire

of

home

sense
defective?
(wrong position)

NO

Zero volts

at LED line?

Repain

PCB

unit

36

YES

Replace feed drum
unit,

head

rope (L)

unit

and rope stopper,

and lubricate.

Replace

or

reset

it.

NO

Lubricate
guide pillar.

YES

Replace it.

YES

Adjust them.

YES

Clean them

or

reset

to

correct position.

YES

>--

Repair

PCB

unit

YES

Replace

it.

NO

Wrong position

or
bad contact between
connector and

lead

wire

of

l8V?

NO

Voltage abnormal

on

l8V

line?

,

,

YES

YES

YES

NO

(

'Range

20 --38VAC

)

is

normal

Voltage

reaches

H solenoid?

YES

H solenoid

motion

defective?

NO

H solenoid
broken7

NO

Repair

PCB

unit.

NO

(

~7

-- 20VDC )

IS

normal

YES

YES

37

Replace

it

..

(1.5A, F-2)

Clean them

or

reset

to

correct position.

Replace transformer.

Repair

PCB

unit

Adjust position

of

H solenoid.

Replace H solenoid.

3.

The

carrier

unit

does

not

move

with a print

command.

START

YES

NO

Correct position and

Clean them or

good contact between
connector and motor

reset it

at

lead wire?

correct position.

YES

Get rid

of

it

and/or

replace rotation

Foreign object

in

detector, reduction

gear train?

gear, clutch, feed
drum unit

or

rope

NO

stopper.

18

NO

Motor lead
wire

set

at

wront position?

NO

Gear train

abnormal?

NO

Replace feed

YES

drum unit, head rope

(L)

unit and rope

stopper and

lubricate.

Reset it

YES

Reset

or
replace gear
train.

YES Reset

or

replace it.

Motion

of

H

solenoid defective?

YES

Adjust

position
of it.

Voltage reaches

motor?

,

,

YES

NO

YES

(

~7-20VAC)

IS

normal

Replace motor

Replace it.

Repair
PCB

unit

4.

The

carrier

unit

overruns

START

Wrong position

or

bad contact between

Clean

or

connector and

LED

or

reset them.

PH

wire

of

dot

sense?

NO

Voltage

on

LED

wire

of home sense zero?

NO

Dot sensor unit
setting abnormal?

No

output

of

dot

sense?

Wrong position

or

bad contact between

connector

and

LED

or

PH

wire

of

home

sense.

NO

Voltage

on

LED

wire

of

dqt

sense zero?

No

output

of home sense?

YES

Repair

CB

unit

YES

Repair

PCB

unit.

YES

Adjust it.

NO

>-----

Replace

dot

sensor unit.

YES

)---

Clean

or

reset them.

YES

>---Repair

PCB

unit.

NO

Replace

)--------

home sensor
unit.

5.

Improper

paper

feed

movement

39

START

YES

Reset

or

clean

passage

of

it.

YES

Replace claw

Manually feeding
paper

by

depressing

LF

solenoid

too

heavy?

NO

LF

rope spring

abnormal?

Function of reverse

stop claw defective?

NO

Wrong position

or

bad contact between
connector and lead
wire of

LF

solenoid?

wheel unit.

Replace

YES tractor shaft

or

lubricate

its bearing.

YES

Reset

or

replace it

YES

Adjust it.

>----Adjust

it.

YES

YES

Replace it

or

reverse

stop

spring

Clean

or

reset it.

Replace it.

6.

No printing or poor print quality

START

Proper position
of print head
unit?

NO

l----

Set paper.

\----

Reset it.

Adjust ribbon feed

)--

__

board or replace

ribbon cam or
carrier unit.

>----

Replace it.

7. The upper or lower dots of
printed characters

are

missing.

START

Proper position
of

dot

sensor

unit?

YES

NO

Ad' . .

f'

JUst

position 0

it.

Flexible cable
properly inserted
into head connector?

YES

Correct position
and proper contact
between pin connector
and head board lead
wire?

YES

>-----Replace

print

head unit.

NO

Proper voltage Repair
on pin connector?

PCB

unit.

"

\--

__

~--.J-

...

,

,(17

- 20

VDC

)

YES

isOK

Proper voltage

NO

Replace print

on head connector? head unit.

"

'----~~Y:-=E':"S---'

........ , ...

( 17 - 20

VDC

)

isOK

YES Replace print

head unit.

Repair

PCB unit.

Proper position
between ridges of
platen and
rotation detector?

After removing gear pin from rotation

NO

detector and adjusting coupling

position

of

reduction gear, adjust

position of

dot

sensor unit.

YES

Replace print
head unit.

8. The upper and lower dots of printed characters

are

too light.

START

Proper position

NO

of

print

head

unit?

NO

YES

Replace it.

9. Printings

are

too light.

Refer

to

"6.

No printing

or

poor

print

quality."

10. Smudging by ribbon.

START

Proper position
of

print

head

unit?

YES

Any

foreign object

on platen

or

print

head

unit?

YES

Remove

it

and

clean.

NO

NO

NO

41

Adjust

it.

Reset

it.

Replace

print

head

unit.

Reset

it.

If

ribbon

is

twisted,

correct

it.

Adjust

it.

Repiace

print

head

unit.