Commodore VIC-1525 Technical Service Data

Commodore
Brand
Commodore
Model
VIC-1525
Type
Technical Service Data
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COMPUTERFACTSTM
PRELIMINARY SERVICE CHECKS
This
data
pr
ovides
the
user
with
a time-saving service
tool
which
is
desi
gn
ed
for
quick
iso
lation and repair
of
prin
ter
m
alfunct
io
ns.
Check
all in
terconnecting
cables for
good
c
onnecti
on and
co
r
rect
hook·
up
before
mak
ing service checks.
Replacement
or
repa
ir
of
the
Contro
l Boa
rd
or
connecto
rs
may be
necessary
after
the
malfunction
has been isolated.
GENERAL OPERATING INSTRUCTIONS
COMMODORE
MODEL 1525
Turn
On Printer, Power
Indicator
(010) sh
ould
be lit. L
ocate
the
Self-Diagnostic
Swi
tch
(SW1) on
the
rear
of
printer.
Switch
pos
i
tion
number
4 is
normal
position
fo
r
one
printer
.
Position
5
is
for
two
printers.
Position
T is se
lf
-d
iagnostic
test
position.
The
Printer
will
continue
to operate in
pos
i·
tion T
until
the
Printer
is
turned
Off
or
Switch
SW1
is
switched
to
position
4
or
5.
Do
not
print
without
paper in-
serted
into
p
ri
nter.
DISASSEMBLY INSTRUCTIONS
CABINET REMOVAL PRINTER MECHANISM REMOVAL
Remove
clea
r
dust
cover
. Remove five
screws
from
cabinet
bottom.
Lift
c
abinet
top
from
unit.
Loosen
four
screws
holding
prin
ter
mec
h
anism
assemb
ly
to
cabinet
bottom.
Lift
assembly
from
cabinet
bottom.
@
@
CN2
CN3
CN4
CN5
SWl
SELF
-
DIAGNOSTIC
SWITCH
@)@@@@
Q3
CN7
CNS
CN9
CN10
CNll
Fl
FUSE
1A
®
Howard
W.
Sams & Co., Inc.
CN12
@
07
@
FUSE
1.5A
F2
CONTROL BOARD
4300
West
62nd
Street,
P.O.
Box
7092,
Indianapolis
,
Indiana
46206
U.S.A
.
T
he
list
ing
of
an
y a
va
ilabl
e
rep
lac
ement
part
here
in
does
not
Reprod
uction
or
U
S.,
witho
ut
expr
ess
per
mi
ssion.
of
~
itorior
or
pictorial
co
n
st
i
tute
in
any
cos
. a
recomm
en
dation,
war
ra
nty
or
g
uaranty
by
cont
ent,
in
any
mann
er,
il
p
rohibited.
No
potent
liabi
lity
is
ouum
.d
w
ith
Ho
w
ar
d
W.
$o
ms
& Co.,
Inc
.,
as
'0
th
e
qu
ali
ty
and
sUit
abili
ty
of
such
r
••
pect
to
the
us.
of
the
in
for
mation
contained
herein
.
re
pl
acem
ent
po
rt
.
The
nu
mber
s of
these
port
s h
ove
bee
n
com
piled
© 1
98.4
Ho
wa
rd
W.
Soms & Co .. Inc.
fr
om
information
furn
ished
to
How
ard
W.
Soms & Co ..
In
<..
by
the
..
300
West
62nd S
treet
, P.o .
Box
7092,
India
napo
lis
,
Indiana
46206 U.S.A .
manufacturers
of
th
e
part
icul
ar
ty
pe
of
replac
eme
nt
p
art
li
st
ed.
Prin
ted
in U.S. of Am
eri
ca. 84CF14933 DATE 10.84
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PRINT
HEAD
~
RECOVERY
HEAD
4E
GEAR
SOLENOID
HAMMER
SOLENOID
FLEXIBLE
SPRING
ROPE
CLUTCH
TRAIN
H2
HEAD
H1
CABLE
7-2
7-5
\
8-10
TR2
M1
ROTATON
DOT
DRIVE
DETECTOR
SENSOR
MOTOR
@
@
@
@@
HOME
HEAD
SENSOR
CONNECTOR
TR1
CN100
@
LINE
FEED
MECHANISM
F3
H3
LINE
FEED
500mA
LINE
FEED
ROPE
AC
FUSE
SOLENOID
®
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0
PRELIMINARY SERVICE CHECKS (Continued)
SERVICE CHECKS
SEE INTERCONNECTING DIAGRAM, PLACEMENT CHART, AND PHOTOS TO MATCH
THE
NUMBER IN THE CIRCLES WITH THOSE IN THE FOLLOWING DATA FOR SERVICE
CHECKS TO
BE
PERFORMED.
POWER SUPPLY
(A)
Check the AC Fuse.
(B)
If
AC Fuse is open,
chec
k Bridge
Rectifier
D6
and D7
for
shorts.
(C)
Check
DC
Fuse F
1.
(
D)
If
F1
is
open, check 0 3
fo
r a
short.
(E)
Check
DC
Fu
se F
2.
(F)
If
F2
is open, check
02
and
04
fo
r
shorts
.
HEAD CARRIER WILL NOT MOVE
(A)
Turn power O
ff
and
check
the Drive
Motor
(
M1)
for
continuity
and
co
nnector
CN6
for
bad con-
necti
on.
(
B)
Check
connectors
CN2 and CN3
for
bad
connec-
tion
.
Turn
powe
r On, measu
re
the Dot
Se
nsor
(TR2)
for
proper
voltages.
(C)
Examine Rotation Detec
tor
(8-10)
for
defects.
(D)
Check for broken Head Rope
(7-5).
(E)
In
spe
ct
the Gear Train
fo
r de
fective
gears.
NO LlNEFEED
(A)
Check
the
Linef
ee
ll
S
olenoid
(H3) for
contin
u
ity
.
(B)
Check
for
broken
Li
nefeed
Ro
pe.
TEST EQUIPMENT AND TOOLS
TEST EQUIPMENT
Digital V
olt/
Ohm Meter
TOOLS
Phillip
s
Screwdr
iver
Sol
der
ing Iron
De
soldering
Eq
uipment
0
CD
(C)
Inspect
Line Feed Me
chanism
for
defective
parts.
(
D)
Check
connector
CN9 f
or
bad con
nections
.
HEAD WILL NOT MOVE
TO
HOME POSITION
(A) Check
connector
CN8
fo
r bad conn
ect
ion.
(B)
Wi
th
po
wer
turned
Off
,
check
the H
Solenoid
(H2)
for
continuity.
(C)
Check for broken Recovery Spring
(7-2).
(D)
Check
connector
s CN4 and CN5 f
or
b
ad
connec-
tions. Turn po
wer
On and measure the Home
Sensor
(TR1
)
for
proper voltages.
(E)
Inspect
the
Clutch
for
de
fecti
ve parts.
HEAD WILL NOT PRINT
(A)
Check
connec
tor
C
N1
0
for
bad
co
nnection.
(B)
If the Print Head makes noise but does not print,
inspec
t it
for
a b
rok
en
Hammer
HAad.
(C)
Turn
po
wer O
ff
and
check
the
Print Head
S
ole
noid (H1)
for
c
ont
inuity.
(D)
Care
fully
examine Print Head
Flexible
Cable
for
damage.
(E)
Check Print Head
Flexible
Cable
co
nn
ect
or
CN100
for
bad c
onnection.
REPLACEMENT PARTS
ITEM
D6,
D7
F1
F2
F3
H1
H2
H3
M1
02
03
04
TR1
TR2
5-
5
7-5
7-
10
8-1
0
DESCRIPTION
Bridge
Rectif
iers (SI
RBAOO)
Fuse (1A @ 250V)
Fuse (1.5A
@ 125V)
Fuse
(5
00mA @ 250V)
Print Head Solen
oid
H Sole
noid
Linefeed Solenoid
Dri
ve
Mot
or
Regul
at
or
Transist
or
(2SB7030)
Regul
ator
IC (UA7805U
C)
Re
gu
lato
r IC (UA7812UC)
Home Sens
or
(1108)
Dot S
enso
r (1108)
Pri
nt
Head
Head Rope
Re
co
very Spring
Ro
tation D
ete
c
tor
Cl
utc
h
Linefeed Rope
TR
2
@)
CN2
@)
CN3
D
OT
SE
NSOR
5.
00y
l r 2
5_
00yl
2
5
.00
V
'
3.m
2.0~y
I
I
40
TRI
H
OME
SE
NSOR
\
@
$
DRIVE
19.4BV 2
10
MO
TOR
/
PRELIMINARY SERVICE CHECKS (Continued)
POW
ER
F3 @
T1
SO
OmA
120V
""o-------4v
AC
1]
0
I
g
SW2
240mA
340
r
TO
TI
CA
SE
@
H3
LIN
EF
EED
@
SOLENOID
490
H2
H
SOL
EN
OID
%
490
u
CN4
@
CNS
C
N?
@
CN9
2
s.OOyl
2
I
2
I
2
CNB
I
2
3.?BY
4.
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INTERCONNECTING DIAGRAM
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MODEL 1525
PRELIMINARY SERVICE CHECKS
SAFETY PRECAUTIONS
Enclosed
See page
3.
INDEX
Page Page
Block Diagram .
..
.
..
.
..
.
....
. .
.......
...
. . . 5
Mechanical Parts
List.
,
.....
..
.
.....
,
....
. .
10
Disassembly In
structions
...
....
.
.. .. ..
. .
....
4
Parts List
..
. . .
.....
..
. . .
.......
.
....
. . 8,9,10
General Operating Instructions
...
. .
....
......
4
Photos
GridTrace Location Guide
Chassis-Top view . . .
...
..
.....
.....
......
. 5
Control Board
...
. . .
...
. . .
...............
11
Control Board " . .
.. ..
...
..
.
....
.
..
.
...
6,11
IC Pinouts &
Te
rminal Guides
..
.....
........
15
Safety Precautions
......
. .
..
. .
..
.
.....
.....
3
Line Definitions .
.. ..
.
............
.
..
.
...
. . . 3
Schematic . . .
........
. . .
.........
.. ..
. . . . . . 2
Logic Chart .
...
. ,
..
..
.
..
...
.. ..
..
.......
. , .7
Troubleshooting
........
. ,
.. ..
.
...
, .
.....
. . 4
Mechanical Removal, Replacement and
Ad
j
ustment.
..
.
...
.
..
. . .
...
.
12
,1
3,14,16,17
Howard
W.
Sams & CO., Inc.
4300 West 62nd Street, P.O.
Box
7092. Indianapolis. Indiana 46206 U.S.A.
T
h.
l
ilting
of
an
y available r
ep
lac
eme
nt port
h.rein
does
not
c
onltitut.
In
a
ny
c
o.e
a
recommenda
tion
. w
ar
r
anty
or
guaranty
by
Howard
W. Sam. & Co.,
In
c .. as
to
the
qu
ali
ty
an
d su
it
ability
of
such
r
.p
laceme
nt
port. T
h.
numbers
of
t
he.e
parts have been c
ompil.d
fro
m
information
furnished
to
Ho
ward
W. Sams & Co., Inc., by
the
man
ufactur.rs
of
the
part
ic
ular
type
of
r.placement
port
li
st.d,
Reproduction
or
US.,
without
expre
..
perminlon,
of
editorial
or
pictorial
content,
In
ony
ma
n
n.r
,
II
pro
hibited. No
potent
liability
II
a
llumed
with
r
••
pect
to
,h.
ule
of the information
contained
~r.in.
© 19iU
Howar
d
W.
Saml
& Co., Inc.
.c3CX>
W.lt
62nd Str
..
" P.O.
Box
7rR2,
Indlanapolil
,
In
dia
na 46206
U.S
.A.
Prln •
.,j
in U.S.
of
Am.rlco
. 84CF14933 DATE 10-84
o
"'0
~
FROH
COI4P\JTER
S
...
P7
IPSI
)--DATA
5
P7 IPSI
)--ATTN
3
P7 IPSI
)--CLOCK
4
P7IPS)
__
)--RESET
6
P7 IPS)
)--SQR
I
P7 (PSI
h
P6
)--o.TA
5
P5
__
)--nTN
3
P6
)--CLOCK
4
P6
)--RESET
6
P6
)--SQR
1
11
P6
h-
S
...
74LS1<f
PART
OF
Ule
74LS14
PART
OF
lJ2C
DATA
CLOCK
L3
-
ATTN
RESET
lS
A PHOTO
FACT
STANDARD NOTATION
SCHEMAT1C
W!TH
'.i·i.liii."i3,
74lS104
....
PART
(FUX
R/il
Sl
RflI(
--
'1'
Hl;)wa,d
W.
Sams
8.
(0_.
Inc.
;986
MAIN BOARD
2
FlS32
P
U4D
P
R.4IVTI/'IER
P
DBO
DBl
DB2
6504
llB3
U7D
OBi
HICft(V)ROCESSOR
D85
086
DB?
7.fi.S14
1-I)?406P
PART
OF
UTC
PART
OF
U2D
tfl7406P
PART
a-
U78
S
...
AD
AO
Al
Al
A2
A.
A3
A3
A4
A4
AS
AS
A6
A6
A7
A7
A8 A8
A9 A9
Al0
Al0
All
A12
IRQ
....
R/J{
RES
?4LS11
74lS1<f
RES
PART
OF
Ule
PART
OF
U1C
NOTE.
Uil:)
PIN
NUHBERS
IN
( )
REFER
TO
24-PIN
CONfIGURATION
71LSOO
PART
Of
U1D
7.flSOO
PART
OF
U1D
P
D80
081
DB2
SS32
e
UBD
usn
IN
EPROH
RAlt/IO
S
...
PIJI
16
He
Ne
NC
NC
He
Ne
AIO
Al1
AI2
74LSH
PART
OF
U2C
P
Ne
P
12
N/l()
NDl
ND2
ND3
ND4
NOS
ND6
ND7
PF
HOLD
CR
HOLD
Hl?4OSP
PART
OF
U2D
R9
150
RflI(
S
...
"
12
"
DBO
DBl
DB2
083
5522
084
U6D
085
IWVIO
086
0B7
1098
..IHOME
POSITION
SENSOR
S
...
/flO
H/fl
HIf2
ff13
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5."
7.fLSJ4
PART
OFU1C
HI
CARRIAGE
MOTOR
2S."
PIJl
14
25B794L
eQ17
PF
HOLD
-=0:01--1
~;:.o.--H~'------":;:;';;":'------'f""-f{
PHOTO
CIRCUlTRACE
=
II
5CHEHATJC
CIRCUITRACE
=
[jJJ
FOR
TERMINAL
GUIDES
ANO
HeTES
SEE
PAGES
16,19
CABLlNG.
HEAVY
LlNES
REDUCE
USE
OF
MULTlPLE
LlNES
LlNE
IDENTIFICATION
ASSlGNED
FOR
REFERENCE
,-----PBO
JS
S
...
~AIN
BOARD
PNl
NC---.7r-
nc
17
(JY
"3
PllJ
'U.
1j§OQ..
I I
11
PIJI
COMMODORE
MODELS 15261MPS·802
SAFETY PRECAUTIONS
1. Use
an
isola
tion
transformer for servicing.
2.
M
ai
ntain AC line voltage at rated input.
3. Remove AC power
fr
om the printer befo
re
servicing
or
installing electrostatically sensitive devices. Examples
of
typical
ES
devices are integrated circu
its
an
d semic
onductor
"chip" components.
4. Use extreme caution when handling the printed
circuit
boards. Some semiconductor devices can be damaged easily by
static
electricity
. Dr
ai
n
off
any electrost
atic
charge on your body by touching a known earth ground. Wear a commercial-
ly available
dis
charging wrist strap device.
Th
is should be removed prior to applying power
to
the unit under test.
5.
Use a grounded-tip, low voltage soldering iron.
6.
Use
an
isolation (times 1
0)
probe on sco
pe.
7. Do n
ot
remove
or
install board, mechanical or electrical parts, or other peripherals
with
printer AC power On.
8.
Do
not
u
se
freon
-p
ropelled sprays. These can generate electrical charges s
uffic
ient
to
damage
semiconductor
devices.
9. This printer is equipped with a grounded three-pronged AC plug. This pl
ug
must fit i
nto
a grounded AC power outlet. Do
not defeat the
AC
plug safety featu
re
.
10
. Periodically examine the AC power co
rd
for
damaged or cracked insulation.
11
. The p
ri
nt
er cabinet is equipped
with
vents to prevent heat build-up. Never block, cover,
or
obstruct these vents.
12.
Instr
uctio
ns should be given, especially
to
children, that objects should
not
be
dropped or pushed in
to
the vents
of
the
cabinet.
Th
is could cause shock or
eq
uipment damage.
o
13
. Never expose the p
ri
nter
to
water. If exposed
to
water turn the unit
Off
.
Do
not place the printer near possible water
~
~
sources.
~
3:
1
4.
Never le
ave
the printer unattended
or
pl
ugged
into
the AC outlet
for
long periods of time. Remove AC plug from AC outlet
~
g
during lightning storms. ~ 0
U'I::D
m
15.
Do
not allow anything
to
re
st on
AC
power cord.
16.
Unplug
AC
power cord from outlet before cleaning p
ri
nter.
17
. Never use liquids
or
aerosols directly on the printe
r.
Spray on cloth and then apply
to
the pri
nter
cabinet. Make sure the
printer is disconnected from the
AC
power lin
e.
LINE DEFINITIONS
AO
Thru
A10
........
. . .
..
. .
......
.
.....
. Address Lines
ALE
.. ..
..........
...
..
.
.......
. Address Latch Enable
ATN
..
. .
..
..
.....
. .
..
. . . . .
....
....
.
........
Atten
tio
n
elK
..
.
.....
..
...
..
........
..
..
..
..
_
....
...
..
Clock
DATA
............
. . .
..
.
.....
..
....
.
......
Serial Data
DBO
Thru
DB7
..
. .
..
..
....
..
...............
. Data Lines
DOF
DPl
ER
...
....
. .
...
..
. . . . . . . . , .
..
.. ..
.........
.
....
Error
RES
.
..
...
. . . .
.....
..
. .
...
..
.
..
.
...
...
....
..
. . Reset
SRQ
..
.
....
..
....
. . .
........
.........
Service Request
Any Bar abo
ve
any
al
phabetical
or
numerical combination indicates line active in a low
(OJ
state.
3
GENERAL OPERATING INSTRUCTIONS
Turn On Printer, Power Inejicator (0
10
) should be lit. Locate
the Self-Diagnostic
Switch
(SW1) on the rear
of
printer
.
Switch posi
tion
number 4 is normal p
osit
ion
for
one printe
r.
Pos
it
ion 5 is
for
two
printers. Pos
it
ion T is self-diagnostic
test
position
. The Printer will
cont
inue
to
operate in posi-
tion T
until
the Pri
nter
is turned O
ff
or
Switch
SW1
is
switched
to
positio
n 4
or
5_
Do
not
print
with
out
paper in-
serted
into
printer.
DISASSEMBLY INSTRUCTIONS
CABINET REMOVAL
Rem
ove clear dust cover.
Re
move five screws from cabinet
b
ottom
.
Lift
cabinet
top
from unit.
PRINTER MECHANISM REMOVAL
Loosen fo
ur
screws holding printer mechanism assembly to
cabinet
botto
m. Li
ft
assembly from cabinet bo
tt
om.
TROUBLESHOOTING
POWER SUPPLY
Printer will
not
turn O
n.
Check the AC Line Fuse
(F
3)
. If
Fuse
F3
is open, check
for
shorted Bridge Rectifier Diodes
06
and 07. Also
check
E
lectrolytics
C10 and C1
3,
and the
Power Tr
ansforme
r
(T1).
Check
DC
Fuse
(F
1)
. If Fuse
F1
is open, check
Ze
ner Diode
04, Electrolytic
C9,
and Regulat
or
IC
(03
) for
short
to
ground. Check
DC
Fuse
(F
2).
If
Fuse
F2
is open, check
Zener Diode 05, Regulator Transistor (02), Regula
tor
IC
(04), and Elec
trolytic
C12
for
short to ground.
If
DC
Fuses
(F1
and
F2)
are norma
l,
apply power and check
f
or
5.00V at pin 2
of
IC
03
. If the v
olta
ge is missing, check
IC
03
, Resis
tor
R
14
and Zener
Di
ode
04
. Check
for
33.2V at
the emi
tter
of
Tra
nsis
tor
02,
and 20.2V at the collec
tor
of
Trans
istor
02
. If
either
voltage is missing, check IC
04
,
Zener
Di
ode 0
5,
an
d Resist
or
s
R1
and
R2
.
CPU OPERATION
Check
for
5.00V on pin
40
of
CPU
IC
(P6).
If 5.00V is
missin
g,
refer
to
the·
Power
Supply·
sectio
n
of
this Troubleshooting
guide.
Verify the 6MHz Crystal (X1) is
OSCilla
ting
by checking the
waveform on pin 2
of
IC
P
6,
and check for a frequency of
6.00MHz. If Crystal X1 is
off
frequency, check Crystal
X1
and Capacitors C14 and C15. Also check
IC
P6
by substitu-
tion.
If
Crystal
X1
is functioning normally, check the waveform
and logic readin
gs
on pins
B,
9,
11
and 39
of
IC
P6.
If any
waveform is
missing
or l
ogic
reading is
incor
rec
t,
check
IC
P6
by
substit
u
tio
n.
PRINT HEAD
The Print Head moves back and
fort
h but is not printing.
Check
for
broken hammer on the Print Head and check the
resistance
of
the Print Head Sol
en
oid
(H1
),
which should
measu
re
5 Ohms across Connec
tor
CN10. If the hammer or
resistance is bad, replace the
Pr
int Hea
d.
Check
for
20.2V at the
emitter
of
Driver Transistor (0 1). If
the voltage is missing, refer to the " Power
Supply"
section
of
this Troubl
eshooti
ng guide. If the voltage is normal,
check Transistor
01.
If Trans
istor
01
is normal, check
for
pulses at pin
27
of the
CPU
IC (
P6)
, pins 12 and
13
of Inverter
IC
(P
B),
an
d at pins 7 and 10
of
Inverter IC (
P7)
to isolate the
defe
ct
iv
e stage. If all pulses were present, check EPROM
IC
(P4)
by substi
tut
ion.
4
HEAD CARRIER ASSEMBLY
Print Head does not move back
an
d
forth
on carriage.
Check f
or
19.4BV a
cross
the Drive
Motor
(M1)
. If the voltage
is normal, check
Motor
(M1), the Dot Sen
sor
Assembly
(T
R2),
an
d check
for
an
obstruction
in the drive gear
assembly.
If
19.4BV
acro
ss
Moto
r
(M
1)
is missing, check
for
a
low
logic
reading during the drive sequence on pin 16 of Inverter IC
(
P7).
If
the re
ad
ing is
not
lo
w,
check
fo
r a high
logic
reading
on pin
30
of
CPU
IC (
P6),
and a high logic reading
on
pin 6
of
Inverter IC
(P
B)
to
isolate the defective
st
age.
LlNEFEED OPERATION
Printer will not advance the pape
r.
Check the resistance of
the Linefeed Clu
tc
h Solenoid (H3), which should read
49
Ohms across Con
nector
CN9. If Solenoid H3 is normal,
check for d
efect
i
ve
mechanical parts in the Li
ne
Feed
Clutch Assembly. Check for a l
ow
l
ogic
reading at pin
12
of
Inverter IC
(P7),
and at pin
2B
of
CPU
IC
(P
6)
during the line
fe
ed
sequence
to
isolate the defective stag
e.
HEAD HOME POSITION OPERATION
Head will not return to Home P
osition
after
printing
first
line. Check for a broken recovery spring and also check the
Head Release
Clutc
h Assembly
for
defective parts.
Check the resistance of the H Solenoid
(H2),
which should
measure 49 Ohms across pins 1
an
d 2
of
Conne
ctor
CNB. If
Solenoid H2 is normal, check the Return Home Sen
sor
(TR
1)
and check
for
a low lo
gic
re
ading at pin
13
of
Inverter IC (
P7)
an
d at pin
29
of
CPU
IC (
P6)
d
ur
ing a return home sequence
to
isolate the defective stage.
PRINTER WILL NOT RECEIVE DATE (SELF
TEST OPERATES)
Program Co
mputer
to
send information to the Printer.
Check for pulses at pins 1
,4,
6,
and
3B
of
CPU
IC
(P6).
If
pulses are missin
g,
check the logic readings
of
IC's
P1, P2,
P3,
an
d PB to isolate the defective components.
SELF TEST DOES NOT OPERATE
Connect a frequency counter to pin 2
of
CPU
IC
(P6
) and
verify that the 6MHz Crystal
(X1
) is oscillating. If Crystal X1
is functioning normall
y,
check
IC
P6
, EPROM
IC
(P4)
and
LATCH IC
(P
5) by sub
st
itution.
BLOCK DIAGRAM
CHASSIS·TOP VIEW
3:0
00
03:
m3:
,...0
.....
0
U'l0
N::u
U'l
m
5
0-
0
o
z
~
:II
o
r-
aJ
o
l>
:II
C
•
:z:
o
~
a
iL
~
'"
a
3
..
I
,
::r
o
0'
PIN 1
PIN
1
CN3
CN2
PIN
1
5.
00V
PIN
1
PIN
1
CN9
CN10
PIN
1
CN11
PIN
Ie
NO
.
PI
1
P
2
P
3 L
4
H
5
H
6 L
7 L
8 L
9
H
10
L
11
H
12
U1
)
13
H
14
H
15
16
17
18
19
20
21
22
23
24
CONTROL BOARD LOGIC
Ie Ie
Ie
Ie
PIN Ie
PIN
Ie
PIN
P2
P3
P4
P5
NO.
P6
NO
. P6
NO.
H
H
H
H
L
L
L
L
L
H
H
H
H
H
H
P(
1)
L 1 L
21
P
1
H
P(
1)
P(ll
2
P
22
P(3
)
2
H
P(2 )
P
O)
3
(7)
23
P
3
H
P(2)
P
(2)
4
H
24
P
4
L
P
P
(2)
5
H
25
H
5
H
P
P 6
L 26
H 6
L
P
P
7
H
27
P
7
P P P 8 H 28
H
(5)
8
P
P
P
9 P
29
H(
2)
9
H P
L
10
H
30
U3)
10
P P P
11
P
31
H
11
P
L
P
12
P
32
H
12
H
P P
13
P 33
H
13
H
P
P 14 P 34 H 14
P
P
15
P
35
U l )
15
P
P(2)
16 P
36
L
16
P( l )
P
17
P(2)
37
H
P P
18
P 38 L
P
P(
1)
19
P(
1)
39 P
L
H 20 L 40
H
P
P
(3
)
P
H
NOTE: Logic probe readings taken with
printer
turned On,
the S
el
f Diagnos
tic
S
wit
ch (SW1) set to the T(Test)
positio
n and
print
head printing unless noted.
Logic Probe Display
L=
Low
H = High
P = Pulse
(1)
Probe in
di
cates H when print head
is
at Home
positi
on.
(
2)
Pr
obe indic
at
es L when
print
he
ad
is moving from right
to
left
(
Home
).
(3
)
Pr
obe indicates H when
print
head is moving from
ri
ght
to
left
(Home).
(4
)
Pr
obe indicates P when print he
ad
is moving from right
to
left
(H
ome).
(5)
Pr
obe in
dic
ates L
during
linef
eed
(6)
Probe indicates H du
ri
ng
linef
e
ed
.
(7) Any
attempt
to
measure
will
s
hutdown
the
printer
.
Ie
P7
H(
2)
H
(2
)
U 3 )
U
3)
U6)
U 6 )
P
(2)
L
H
P
(3)
H(5)
H(
5)
H
(2)
H(2 )
P
(3)
p(3)
Ie
P8
L
H
L
H
L(
3)
H(2
)
L
U3)
H(
2)
U6
)
H(5
)
P
(2)
P
H
o
"tJ
~
7
0:1
PARTS LIST AND DESCRIPTION
When ordering parts, state Model, Part Number, and Description
SEMICONDUCTORS (Select replacement for best results)
REPLACEMENT
DATA
ITEM TYPE
MFGR.
NEW·TONE
PHILIPS
No. No.
PART No.
GENERAL
MOTOROLA
RCA
WORKMAN
ZENITH
ELECTRIC
NTE
ECG
PART
No
.
PART No. PART No.
PART
No.
PART
No
.
PART No. PART No.
01,2
IS1588
GE-514
IN
4935
NT
E519
ECG519
SK3100/519
W
EP
925/519
103-
131
03
30CB
GE-504A
lN4003
NTEI16
ECGI16
SK331 I
WEP156
212-76-02
V06C
GE
- 504A
IN4003
N
TE
116
ECG116
SK3311
WEPI56
212-76
-0
2
D3A
04
HZ6C2
GEZD-6.2
IN5234B
NTE5013A
ECG5013A
SK6A2I5013A
WEP1414/5013
103-Z9008
05
HZ9A2
G
ElD-8.2
lN5237B
NTE5016A
ECG5016A
SK8A2I50
16A
WE
P141715016
103-Z9019
06
, 7
SIRBAOO
GE-5304(11)
MDA920A6(11
NTE5304(11)
ECG5304 (
11
)
SK3106/5304(11)
WEP1053(11)
SIRBAIO
GE-5304(ll)
MDA920A6(II
NTE5304(11)
ECG5304(11)
SK3106/5304(ll)
WE
PI053(11)
PI
MB74
L
SI4
SN74LSI4N
NTE74LSI4
ECG74LS
14
SK74LS
14
H
E-443-872
P2
SN74LS08N
SN74LS08N
NTE74LS08
ECG74LS08
SK74LS08
HE
-
443-780
P3
MB74LS74A
SN74LS74AN
NT
E74LS74A
EC
G74LS74A
SK74LS74
HE-443-730
P4
M5L2732K
273212332
P5
SN74LS373N
SN74LS373N
NTE74LS373
ECG74LS373
HE-
443-867
P6
D8039LC
MB8881N
MB8881
P7
ULN2003A
NTE2013
ECG
2013
SK909312013
75468
NTE2013
ECG2013
SK909312013
P8
SN7406N
GE-7406
NT
E
7406
ECG7406
SK7406
01
2SB703O
GE-303
MJ
E15031
NTE292
ECG292
SK3441 1292
WEP781
1292
121-Z9048
2SA636
GE-29
MDS77
NTE187
EC
G187
SK9076/187A
WE
P7521187
121-988-03
02
2SB703O
GE-303
MJEI5031
NTE292
EC
G292
SK3441/292
WEP7811292
121-Z9048
2SA1069C
NTE55
ECG55
SK9367155
03
UA7805UC
GEVR-I02
tlC7805CT
NT
E
960
EC
G960
SK3591/960
221-Z9043
UA7805C
GEVR-I02
tlC7805CT
NTE960
E
CG96
0
SK3591/960
221-Z9043
p4
UA7
8
12UC
GC:VR
-lll
MC
7812CT
NTE966
ECG
966
SK35921966
W
EP
966L1966
HE-442~74
UA7812C
GEVR-lI1
tlC7812CT
NT
E
966
ECG966
SK3592/966
WE
P
966L/966
HE
-442-674
RI,
2
1108
(II)
MountIng
techn
Iq
ue
may
vary
from
orIgInal.
PARTS LIST AND DESCRIPTION (Continued)
When ordering parts, state Mode
l,
Part Number, and Description
CAPACITORS
Items
not
liste
d
8re
norm8
11y
8v8118b
l e
8t
loc8
1
dist
ri
butors.
ITEM
RATING
MFGR.
No.
PAR
T No.
C17
•
0047
1
25VAC
RESISTORS (Power and Special)
ITEM
No
.
RATING
RAI-I
Resl
stor
Network
(1)
RA2-1
Res I
stor
Network
(1)
(
I)
Con
t
~Ins
ei
ght
1000 10%.
TRANSFORMER(Powe~
IT
EM
RATING
No.
PR
I.
SEC.
1
S
EC.
2
T1
120VAC
9.20YAC
24.00YAC
i
i
i
240
m
AAC
310mADC
583mAOC
(I)
Number
on
u
ni
t.
FUSE DEVICES
ITEM
NO.
DESCRIPTION
DEVICE
FI
IA
i 250V
Fast-Acti
ng
F2
1.5A
i
125V
Fast-Actl
ng
F3
500mA
i 250V
Fast-Acti
ng
2
50m
A i 250V
Fast-Acting
ITEM
No.
MFGR.
PART No.
MF
G
R.
P
AR
T
No.
ETP57EI59G(1 )
MFGR.
PA
RT
N
O.
RATING
REPLACEMENT
DATA
NEW·TONE
PART
No.
REPLAC
E
MENT
DATA
THO
RDAR
S
ON
PART
N
o.
H
OL
DER
MFGR.
PART
No
.
WORKMAN
PART No.
NOTES
NOTES
9
PARTS LIST AND DESCRIPTION (Continued)
When
ordering parts, state Model, Part
Num
be
r, and Descript
ion
MISCELLANEOUS
ITEM
PART
NAME
MFGR.
NOTES
No.
PART
No.
0
10
LED
Po
wer,
Red
(1.62V
@
12
m
A)
HI
Head
Prin
t
H2
So
lenold
H
H3
Solenoi
d
Li
ne Feed C
lutch
Ml
Motor
DrIve
SWI
Switch
Se I
f-
DI a
gnostl
c
(4/5/T)
SW2
Swi
t ch
Power
(O
n
/Of
f)
Xl
Crystal
6M
Hz
CABINET & CABINET PARTS (When ordering specify model, chassis & color)
ITE
M PA
RT
No.
Soundproof
Cover
Cover
Unit
U
pper
(A
se
Un I t
WIRING DATA
Shi e l
de
d Hook-up Wire
••••••••••••••••••••
Genera l- use
Unsh
ie lded
Hoo
k-up Wire
••••••
MECHANICAL PARTS LIST
REF.
PART
DESCRIPTION
NO.
NO
.
6-1
Ll
n
efee
d
Rope
Spri
ng
6-2 Reverse Stop
Claw
6-3
Rev
e
rse
Stop Sp
rin
g
6-4
Llnefeed
Clut
ch
So
lenoid
6-5
Llnefeed
Cl
aw
Wheel
6-6
Gear Pin
6-7
Claw
Whee
l Un
it
6-8·
Claw
Wheel
Sprin
g
6-9
l
lnefee
d
Claw
Stopper
6-10
Linefeed
01 al
6-11
Dia l Clut ch Sp
ri
ng
7-1
FPC
Guide
7
-2
Recovery Spri
ng
7-3
Ro
pe
Sprl
ng
7-4
Ro
pe
Sto
pper (1
se
t)
7
-5
He
ad
Rope
(l)
Un
it
7-6
Feed
Dru
m
Un
it
7-7
Drum
Spri
ng Step
7-8
Dru
m Spring
7-9
Pul ley Pin (2 used)
7-10
Spring P
ul
ley (2 used)
7-11
Rope
Pul ley (4 used)
7-12
Gu
I
de
P I I I a r
7-13 Damper
10
I
TE
M
PA
RT
No.
Lower Case
Un
it
Ribbon
Cassette
Use
BEL
DE
N
No
.
84
01
or
8421 (Sing Ie-Con
duct
o
r)
82
08 (T
wo-Co
nduct o
r)
Use
BELDEN
No.
8528 (So l
id)
Ava
ila
b le In
13
Co
l
ors
8522 (
St
randed)
Ava
i lab le In 13
Colors
REF.
PART
DESCRIP
TION
NO.
NO.
7-14
Carrier
Un
it
8-1
Clutc
h
Mov
i
ng
Sprin
g
(H3)
8-3
CI ut ch
Step
8-4 CI
ut
ch
8
-5
S
prl
n~
Pan
8-6
Cl
u
tc
S
pr
ing
8-7
CI
ut
ch
8-
8 Red
uc
t i
on
Gear
8-9
Gear PI n
8-10
Ro
t
ation
Detector
8-11
Reduction Gear
8-12 Gear
PI
n
8-13
Re
d
uc
t ion
Gea
r
8
-14
H
So
lenoId (H
Z)
8-15
Dr Ive
Mo
to
r (Ml)
9-1 Soundproof
9
-2
Gu
I de P I I I a r
9-3
Pa
pe
r
Hoi
dar (Ll Un I t
9-4 Paper Ho lder
(R)
UnIt
9
-5
P
laten
Bearing
9-
6
Tractor
Sh
aft
9-7
Pin Feed Rol l
er
(2 used)
9-
8
Tractor
Ru
bber Ring (3 used )
9-10 Rubber leg (4 u
sed)
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CONTROL BOARD GrldTrace LOCATION GUIDE
* Located
on
other
sIde
of
board.
Cl
C-3
C
ll
B-6
CN6
A-6
03
A
A-9
P4
C-4
R2
B-1
R
12
B-14
C2
B-1
C12
0-12
CN7
A-l0
04
0
-9
P5
C-5
R3
B-1
RD
A-8
C3
A-I
CD
B-14
CN8
A-II
05
C-13
P6
B-6
R4
C-3
R
14
C-l0
C4
A-5
C14
A-5
CN9
A-12
06
C-ll
P7
B
-7
R5
A-5
R15
C-9
C5
0-4
C15
A-5
CN10
A-13
07
A-15
P8
C-
7
R6
C-3
RAl-1
B-1
C6
0-5
C16*
A-l0
CNll
A-14
Fl
B-ll
Ql
B-8
R7
B-9
RA2-1
C-8
C7
C-7
CN2
A-I
CN12
A-15
F2
B-15
Q2
B-12
R8
0
-13
Sill
0-1
C8
0-8
CN3
A-2
01
A-3
PI
B-2
Q3
B-l0
R9
B-1
TP2
A-7
C9
C-9
CN4
A-3
02
B-6
P2
B-3
04
0-12
RIO
B-1
TP3
A-7
Cl0
C-l0
CN
5
A-3
03
A-
8
P3
A-4
Rl 0
-3
Rll
C-ll
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S~S~
1300W
3~OOOWWOO
MECHANICAL REMOVAL, REPLACEMENT AND ADJUSTMENTS
PRINTING
PRINTING MECHANISM
This Printer is based on a single printing hammer system
which
Is q
uite
unique and
different
from other impact dot
prin
ting
systems. The
tim
ing
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
an
d graphics do
ts
are printed when the relative
posit
ions of the hammer he
ad
and the platen are encountered. The relationship of the
hammer,
th
e platen and the dot sensor is shown in Figu
re
1;
that
of
the hammer head, printed dot, and signals of the dot
sensor in Figure
2.
F
RO
M ®
.
~
H
AS
A S
LQPE8
PLATE
N 10 rps (R
n-
olutions of
mo
tor a
f'
reduced
10 1/6 by redu
ction
gllr)
H
Uh'.
n
ly
di
w
idld
18ridge1
PI.
p,
......
Pl~
V IEW POI NT / H
AMM
ER
HEAD
PA
RT
® . AG
AIN
ST RIDGES
DETA
ilS
OF
PART ®
FEED
DRUM
UNIT
Figure 1
HAMMER
HEAD
Figure 2
Idl
~
OIST
AN
CE
BETWEEN DOTS
-'-,
SLOPE
OF
HAMME R
8.t.
n~
p
ADJUSTMENTS
FOR
PRINTING
Make the
followi
ng adjustments after setting the ribbon
cassettes and paper.
(1)
Adjusti
ng 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
I.)
........
l
ig
ht
E
Ib)
E
Ie)
" l
ig
ht
(b)
..
. . Upper
part
is
li
ght,
mo
....
e
the dot
se
nsor to right.
(e)
...
Lo
wer
part
is light, move
un
it it
to
le
ft
.
Black and red
dot sense
LE
D wire
Figure 3
(2)
Adjusting the printing start posi
tio
n with the carrier
unit
an
d the home sensor
i)
The gaps between the carrier unit and the home
sensor
Gaps A and B should be about O.5mm, with B
smaller than C. The gaps can be adjus
te
d by
twisting
oblique line part of the earth plate (L).
Eanh
plate
(L)
Yellow and black,
home sense
~ffi1
:
o
m'
sen,,,
un;t
l~
ar
r
;
"
un"
--
==o;
ft=
~~:
~,...1
-
PH wi
re
C
...,
~
8
ii)
Figure 4
Adjustment
for
aligning the start position of print·
ing
(C
onnect T
P2
and TP3
of
PCB unit
to
oscillos
cope)
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.
Dot
..
nsor
-.fl---'----I
~
L
Homesenso,
-----.
-
~
Figure 5
P
erm
issible range in
wh
ic
h
the
fallirlil'
edg
e
of
the
hom
e sensor shouk:l be,
If
the falling-edge
of
the home sensor pulse sh
ifts
to
right .
.....
. S
hift
the home sensor un
it
to
right.
If the falling-edge of the home sensor
pu
lse sh
ift
s
to
left .
......
. . Shift the home sensor unit
to
l
ef
t.
Pr
inting Pressure Adj
ustm
ent
You may adjust a lever on the print head according
to
the
thickness
of
the paper. If smudging occurs or if prin
ti
ng is
too
dark, mo
ve
this lever one
click
hole counterclockwise at
a time
unt
il you are sa
ti
sfied with the printing quality;
if
printing is
too
light, move it clockwise. When adjusting the
leve
r,
make su
re
that it is placed
dir
ectly in the hole, not "in
between" two
of
them.
Figure 6
Courtesy
of
Commodore Business Machines, Inc.
12
MECHANICAL REMOVAL, REPLACEMENT AND ADJUSTMENTS (Continued)
CARRIER
CARRIER UNIT MOVEMENT AND RIBBON FEEDING
Figure
7
shows
right
ward moveme
nt
of the
carrier
unit and
ri
bbon feeding due
to
mo
tor
r
evolutions.
Figure 8 describes
the carrier u
nit
's return to the
home
position
,
acti
vated
by
the
H solenoid.
P
RI
NT
DIRECTION
OF R
la
SON
MOVEMEN
T
HEAD UNIT
RI
BBON
CAM
RI
t:lBO
N FEED BOARD
RI8
80N
CA
M Figure 7
RIBBON
C~M
£
SPRING
~
RI
BST \
FEED BOA
RD
RI
BBON
Ribbon is fed in the arrow direction when
ribb
on is caught
be
tw
een ri
bb
on cam and ribbon feed board. When carrier
unit
returns
le
ft
ward, ribbon is not caught.
When H
solenoid
is p
ul
led,
the
clutch
is released and the
carrier
unit
returns
to
the le
ftmo
st h
ome
posi
tio
n
fo
rced by
the
re
covery spring.
CON
STRUCTION OF H
SO
LE
NOlO
AND
C
LU
~
C
H
:;
CLUTCH
H SOLENOID :: (JAW C
LU
TCHI
~.
--i
__
;1
<""""\..,
'
,J'
.J
t=
-g
!:"i
1l11/11111
~
-
-
·
~
l'--------i;
~L...
j
CARRIER
U
NIT
AN
D PR
INT
HEAD
UNI
T
-I-
r--t
'.
:/j/" '
:,
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
I
RE
COVE
RY
SP
RING
Figure 8
LlNEFEED
LlNEFEED MECHANISM
Figure
9 shows the linefeed
(p
aper feed)
controlled
by the
motion
of
th
e LF s
olenoid
. The LF
soleno
id
is
act
ivated
three
times
fo
r
printing
characters and
two
times
for
prin·
ting
graphics.
The tran
smission
sequence
of
a LF
solenoid
motion
is:
'-
LF
--
I_
Q~
LF
CLAW
I
_~
~
TRACTO
R
~
TRACTOR
I
~
~
_)
WHEEL
~
~
__
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.
ii) The saw
teeth
of
the LF claw wheel and the saw
te
eth
which are pushed by the claw wheel spring are coupl·
ed
.
/1
6
9·'
/
--1
63,,£-
W.51 6.2
'f.l
, 6·8
E40
I)
W
~
S·28
.:
LU
b
"cale
SF.
,00o
n t
2:::J
hesaw
e;;.
-/I!
teeth
and
the t
eeth
pa
rts
of
-'
65.od
6·7" / " 6
.1
S-
31
6.4
01
Figure
10
Lu
bricat
e
SH
OO
on
LF
rope
• 1
6-6
should be
In
the
groo
ve
of
6-5,
but
not
In
t
hat
of
6 ·] .
. r
"1
6·4 AND 6·9 ADJUSTING METHOD
i)
ii)
iii)
While
pushing
dow
n part ® of 6
-4,
fix 6·4 w
it
h S-31
at
the pos
itio
n wh
er
e 6·2 falls
fr
om a t
ooth
top
of 6·5. The
screw
S-28
should
be set
to
the
direction
as
shown
in
the le
ft
figure.
:s:::
0
0 0
While pressing part ®
of
6-
4,
fix
6-9 w
it
h S-32 at
th
e C
~
position
where ® part
of
6·9 and ® part
of
6
-7
are m 0
coupled
to
stop
the
revolution
of
6-7
.
~
C
Confirm
linefeed
functions
by
pressing
part ®.
EARTH PLATE ILl
·1
6 4 and 6 9 adJu
st
ing
meth
od
6-2
''I''
~I:
,
....
",
't
~1)
)
5
31
~~
'
7"
)/
5
h S 28 6
\@ ©I
.1
r··
- \ ,
i~
/'"
Figure 9
. ,'
~
,
""=--
I
~
'-
~
6
"
'
Figure
11
U1 0
N
:;o
U1
m
C
ourtesy
of
Commodor
e Business Machines, In
c.
13
MECHANICAL REMOVAL, REPLACEMENT AND ADJUSTMENTS (Continued)
LOWER CASE BLOCK
AND
MACHINE
ASSEMBLY
' 1
Be
fore
re
placing 2-3 and 2-4 with 2-2, the carrier unit
m
ust
be moved
to
the center. When setting 2-3 and 2·4,
be careful n
ot
to
catch the lead wires
or
the recovery
spring between
2-3 and 2·4, and to damage or to inju
re
them.
'2
Pay atte
nt
ion not to damage the flexible cable.
Do not mo
ve
the carrier unit
directly
by hand.
By
pulli
ng
and revolving the clutch on the right side'counterclockwise,
the carrier unit can be moved
to
the center.
Part
® setting note
II
I
nse
rt
tw
ist
ed e
nd
s of
l
ead
wire
and
m
ake
S1Jr
e
they
are
no
t shorted.
TRACTOR
'1
Pu
sh 9
-9
o
utside
as far
as
it will go and fix with 5-3
2.
'2
Assemble the two
9-7
so that the
pi
ns of th
em
are faci
ng
each
othe
r.
'3
Ch
eck that the surface
of
9-6
(Q
part is smooth a
nd
has
no scar.
9·10
2·3
Courtesy of
Co
mmodo
re
Business Machines, Inc.
14
Figure 12
Figure 13
Uflplug/plug
In
Lu
bri
cate
SF-1
OO
in
side
15
IC PINOUTS & TERMINAL GUIDES
M
B7
4LS
7IA
I IC
LR
vec
14
10
CL
R
1CLR
CLR
13
0
IC!
CK
0
20
12
IPR
CK
2C!
II
PR
10
PR
l PR 10
10
QQ
20
7
GNO
10
P3
fLIP
/
flOP
TOP
VIEW
@
.,.
?
b~
.
,.
CNI
PIN
VI
EW
10
1
.
I
Il
1
II
,
1\
,
10
, ,
1 8
PI.
PI
.
P8
TOP
VIEW
M5
12m~
I
A7
v
ce
24
I
T0
1
A6
A8
13
2
HAL
3
AS
A9
11
3
HAL
4 M
All
21
4
RESET
5
A3
OEN
PP
10
5
SS
6 AI
AID
19
6
iNT
7
AI
C1
18
)
EA
8
AD
07
I)
8
RD
9
00
06
16
9 P
SEN
10
01
05
15
10
WR
II
02
04
14
II
ALE
12
GNO
OJ
13
11
DBO
13
OBI
P4
EPROM
14
OBI
T
OP
VIEW
15
DB3
16
OB4
17
OB5
18
D
B6
19
DB)
10
VSS
~
"'
~"'
B C [ I 2 J
01
.
02
Q3
.
04
fRONT
VI
EW
fRONT
VIEW
D8039LC
P6
CP
U
TO
P
VIEW
OU
TP
UT
\'CC
40
CONTROL
J
TI
39
P27
38
P26
37
P2
5
36
P24
35
PI7
34
P 16
33
m
31
P
14
31
PI3
30
PI2
29
PII
18
PIO
27
VD
D 16
PR
OG
15
P23
14
P2
2
23
P21
22
P20
21
3
..
~
60
I 8 9
RA
I·I
fRO
NT
VI
EW
"
I I
~~:'
I 1 ) , S 6 J S
1A1·1
fRONT
VI
EW
SN
74
LS373
N
P5
o
TYPE
LATC
H
TO
P
VI
EW
UlN
2D01A
15
14
13
II
11
E
NABLE
G
»
--~1
6
»-.--H
I3
..:x>
-.--H
12
,><>-.--~
II
P7
INVE
RTER
TOP
VIEW
CNIOO
WIRING
V
IE
W
MECHANICAL REMOVAL, REPLACEMENT AND ADJUSTMENTS (Continued)
FEED DRUM AND CARRIER UNIT
Lubr
i
catio
n
on
7 -
10,
7 ·11
and
the
shaft
of
7·6
o
7·'
Lubricate SF-
l00
on
the
gr
oo
ve
and
the
shaft
of
7- 1 1 r
ope
pulley
14
pes
.)
lubr
icate
SF-
1OO
o n
the
groove
and
the
s
haft
of
7
-1
0 spring
pulley
(2 pes-I
W·
32
S·30
Earth
pl
ate
(R)
Clutch
Figure 14
"'
The cam 7-16 and t
he
bend
of
the ribbon feed board
must
be parallel. If not
pa
ra
ll
el, ribbon feeding may fu
nctio
n
abno
rm
ally. In this case, you can either change 7-16 or
ad
just the b
en
d
of
the ribbon feed board by using pliers
to fit the cam
7·16.
B
endo
t'
;bboniQ
i
~
I
feed
boar
d
Cam
] ·
16
I
I
IIt"",.;s.nygD
~r~
r
eplace
7-
16
Figure 15
'2
When 7-14 is at t he home
pOS
ition, there should be gaps
between
the
home sensor (Refer to Figure
4).
"3 Firmly insert
7-12
in
to
the
earth plate
(R)
and
(L),
and
tighten
with N-31.
·4
On
ce you have removed t
he
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 f ixin g
too
l.
The
fix
ing
too
l
sh
ou
ld be taken
off
after
you have
finished
assembling
with S-29 screws.
Head
rope
(
R)
i Be careful
not
to
Itt
tht
f iXing
too
l
~
J.
~~:
ft~i
.d"
...
d
","
01
tn.
"ead
/ ·6
F
..
,ngt
~
~
. .
"~Adheredpartof
~
~
F"
',!o~
head
>ope
fR
I
1
Figure 16
"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:
0
i)
Inject
screw
lock
into
the screw
hole
of
the carrier
3:
0
unit.
03:
ii) T
ighten
the
screw S-29 to the extent
tha
t the rings of
~
3:
the head rope
(R)
and
(L)
can be revolved .
r-
0
....
0
'ff'"
Screw 5·29
Screw S·29
~
Do
not
Inject
hen
c::Il
lniect
screwl
ock
im.d
e
11
-R Irtg must
be
able
__
to
turn
around.
Screwlock shoukl
not
be overfloW@d.
S
crew
lock
Figure 17
'7
Check the
following
after
attaching
the recovery spring
7-
2.
After
manually pulling and revolving the cl
utc
h
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
u
nit
7·6.
Adhe-re::i positIOn Sl'Iould have
rooms
/_
."
when
carrlet'
un
rt
is
~
at
the
rlghtm
on
end .
~ ~
1_ S
houkj
have
rooms
_ f
at
the
ho
me pOsit ion
~
FeecI
~rum
Head
rope
fA)
•
umt
7-
6
Rope
S'lapper 7· 4
Shoukl
havt
gap
s
Figure 18
After
pressing the H solenoid
to
release the
clutc
h
(Figure
8)
, check the
smooth
mot
i
on
of
th
e carrier unit,
its return
to
the home position, and al
so
the adhered
positio
n and i
ts
status
of
the
feed drum unit 7·6 at
the
home position.
UlO
N::u
Ul
m
Courtesy
of
Commodore BUSiness Machines, Inc.
16
MECHANICAL REMOVAL, REPLACEMENT AND ADJUSTMENTS (Continued)
GEAR TRAIN
'1
The way
to
set 8·10 and 8-
9.
Attaching method
of
8-10
When a platen ridge is at the horizontal
position,
cou-
ple 8-10 and
8-1
3 in the
status
of
a, and a
7
of
8-10 faCing
the
t
wo
screw
holes
of
the
earth
pl
ate
(R)
respectively.
Attaching method
of
8-9
Fit
the
holes
of
8-10 and the
motor
shaft, and then in-
sert
8-9
using
pliers.
'2
Fi
rst, insert the
M.
stop screw into the rubber leg
(Figure 12), and then fix 8-2 by S-31 . Make sure there
are gaps between the grooves of
8-2 and 8·10.
Motor
'haft
L
ubr
icate SF·1
00
on the sow
tooth
pan
and the tooth
pan
of B-4 and
8·7
l
LUbricot.
SF
·'OO
on
both
ends
_ Block and
rod
Grooye
' 2
?
~
-4
8.2 5·31
Black
and
white
Figure 20
.
,
~a
,
8· ,3
Sc~
·
holes
for
fixing
the
dot
sensor
of
the
eanh
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Courtesy
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Commodore BUSiness Machines, Inc.
17
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Commodore VIC-1525 Technical Service Data

Commodore
Brand
Commodore
Model
VIC-1525
Type
Technical Service Data
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