Commodore MPS 1250 Service Manual

Page 1
Commodore
£
-9T
-
OoH
iT
MPS
1250
1200/P
to
Service Manual
10/88
Commodore
Page 2
Parallel
and
Serial
BIP
(SPECIFICATIONS FOR
EUROPE)
Page 3
.
)
)
1
Control Circuit
Parallel
2.
(1
(2)
(3)
3. Serial
(1
(2)
(3)
(4)
PARALLEL AND
TABLE OF CONTENTS
Block Diagram
Interface Specifications
Specifications
Pin,
No. and signal name
Description
Interface
about
Specifications
Specification
Pin No. and Signal name
Description
about interface signals
Data transfer sequence
interface
signals of
of CN13
SERIAL BIP
CN12
o-]
D-3
;
D-3
D-3
D-4
D-6
D-6 D-6
'.
.
. D-6
,
, D-8
Specification
4.
5. Parts Lists
Circuit Diagrams
6.
Mounting Diagram
(1)
Circuit Diagram
(2)
Setting DIP Switches
D-10
f^
Page 4
STANDARD
Parallel And Serial
BIP {Basic Interface Pack)
Control
1.
Host
Computer
(Cenironici
Co
Clocked Serial
Connector
mmodors
Circuit Block
V
like)
Connector
)/0
I
J.
I
I
j
Connector
I/O
Diagram
l/F Select
Circuit
) G
7T
Serial Bus
Control
Circuit
MHz
8
^^
ALE
CPU
^mI
Address
Laich
v.
7^
Block
ROM
Shift
Register
c
Diagram
II
128k'
Driver Interface
oTp
Switcfies
<o-
-crb-
Bus
U
RAM
J
8k
Power
P.C.B.
/Driver
block
A
parallel or
of 8 bits
data
together with
input
input
.At
inside.
enabled.
is
data
Serial data
serial bus
CPU takes
The
Printing is
code, etc.
CR
unit is
This
structions
assigned
diagram
tor the
Commodore
(*DATA1 to
the strobe
of
When
CPU
the
from
control circuit.
in the data
started
received.
is
controlled
will
interface
to
executed
be
parallel
serial
*DATA8)
the data.
signal,
finishes
processing
host-computer
when
if the
data
an
by
with
for host
lines
serial BIP
and
can be selected by
is input
becomes HIGH
BUSY
input
8-bit
signal
the data,
input
is
transferring
reaches
one-chip
minimum
a
and interface bus
CPU
through TTL
of
one line
microcomputer.
unit of 1
1
Fig.
is shown
the
the I/O connector.
via
in Fig.
DIP switches
and
BUSY
1
signal
is completed.
byte
or print start
nS.
level
with
For interface,
1.
on the
Interface Board.
Strobe
*DATA1
to*DATA8will be
becomes LOW
converted
and
command
The clock
The CPU
Power/DriverPCB.
of CPU
has36I/O
either
signal (*DSTB)
again
parallel data
to
code
ports
Centronics
inputting
and
such as LF
MHZ
is
8
and they are
Parallel
also
is
stored
of
in the
code,
and in-
^
-D-1
-
Page 5
In addition,
stepping
As
lower 8
motor
memory,
the
bits of address bus
with ALE
the CPU
driving timing,
ROM of 128
signal.
has six
independent
print head
kilobytes
are the
ones
timers and each
current flowing
and RAM of
which
are generated
them is used to
of
time. etc.
kilobytes are provided
8
latching the multiplexed
by
control
as
printing timing,
standard
and the
data
bus
o
Connection to
following control
the
Phase data
PCB at
switches
serial
data
Power/Driver.
Clocked
serial
Stepping motor
lines.
data
PCB
bus
voltage
Operation panel control
Sensors input
Master reset
of stepping
high speed via the
becomes
bus.
signal line"
signal line
motor and
serial
data by
above-mentioned
will be done by
control
line
line
printing
means of a
the driver interface bus
serial
head are
data
of print
data
clocked
shift register and
it
bus.
is
and this
transmitted
Moreover, the
taken
to
bus
to
CPU by
consists of
Power/Driver
DIP
of
data
the clocked
n
-
D2-
Page 6
Parallel
2.
Specifications
(1)
Interface Specifications
Transmitting
Data
Synchronizing
Handshake
Level
Logic
Pin No. and signal name
(2)
Parallel
Specifications
PIN
No.
1 19 •DSTB
2
3 4
5
6
7
8 9
10
Type
Method
RETURN
PIN No.
20
21
22
23 24
25 26 27
28
(CN1
Parallel
bit
8
externally supplied
By By
TTL
2)
"ACKor
compatible
Signal
BUSY
name PIN No.
•DATA!
•DATA2
•0ATA3
•DATA4
•DATA5
•DATA6
•DATA? 'DATA8
•ACK
strobe
16
17
18
19-30
31
32
RETURN
PIN No.
-
-
-
Signal name
V
FRAME
GND
+5 V
TWIST PAIR
GND
•PRIME
•FAULT
(Note
n 29
12 30
13
14
15
1 )
•FUSE
is
connected
BUSY
PE 34
-
-
-
to
SLECT 35
•AFXT
NC
+5
via
V
a 3.3 KQ
resistor.
33
36
-
-
-
-
GND
NC
•FUSE
(Note 1)
•SLCT IN
n
-D-3
-
Page 7
(3)
Description
'DSTB:
*DATA1 to
*ACK:
BUSY:
about interface
signals
Synchronized pulse of
than
0.5mS
'DATAS:
logical 1 and LOW
demanding
Data
proximately
the receiving end.
at
The parallel
level
signal sent
5 tiS.
This is
HIGH level Indicates a
BUSY state may
is in READY
BUSY
conditions are as
not be guaranteed.
condition.
of
CN12
parallel data. The pulse width of this signal must be
8-bit
data sent from
for
logical
a
from
strobe
a
"printer busy" status to
follows:
the
sent
0.
printer
out
When
to
when the printer
this signal
the host CPU. High level for
the
host CPU.
the host CPU.
goes to LOW level, the printer
The
goes to
pulse
READY
Data
width
sent during
more
is
state.
a
ap-
a.
b.
c.
PE;
Goes to
-matically set to
inserted.
SLECT:
'AFXT ('AUTO
"PRIME
'FAULT
"SLOT
Connected to +5V
ly fed after
cates the
buffer are cleared.
receiving end.
three
a.
b.
c.
Printer
IN:
During
data
OFF LINE
In an alarm
HIGH
level
FEED XT):
printed by OR
(*INIT):
(ERROR):
Printer
printer
When
conditions;
Paper Out
OFF LINE
Printer Error
error conditions
Home position
During printing,
did not
match.
When this
receive time
condition
when paper
LINE. It
OFF
via a 3.3
Kn resistor.
When this
code.
initializing
is in the
The pulse
sensor
collation
signal is in LOW
same condition as
this signal is
are as
cannot be detected
runs
cannot be reset to ON
signal is
signal.
In paper out
out.
set to
LOW
When this signals
LINE status
level, one line is automatical-
is
power on.
width of this signal must be
in LOW
follows:
of the
level, the
level, the printer
moving
by
current
address and
printer is selected.
status,
set to
the printer
until
LOW
The contents
more than
is in one of the
the print
the home
head
is
auto-
paper is
new
level, that indi-
of the print
the
50 fiS
at
position
at
following
power
on.
sensor
r^
•SLCTIN
Since the
the connection on
to
signal
o
'SLOT
the
IN
HOST
777-
has the
-D-4-
JP1
circuitry
side.
LS04
Fig. 2
Driving
shown
in Fig.
with TTC IC may
caution
2,
should be paid
damage.
cause
Page 8
+5 V:
The
Power
printer
timing chart for data-input is shown in Fig.
supply of +5 V. This line must
may be damaged.
SUSY
'ACK
3..
not
be used
the HOST side. If used, the
at
3. Timing Chart
Fig.
-
D-5-
Page 9
Serial interface
3.
Specifications
(1)
Specifications
(2)
Interface
Length
Word
Sianal
Pin No.
Level
and signal
Serial Specifications
Pin No.
1 SERIAL
2
3
4
5
6
Commodore
8-bit
TTL
name
(CN13)
Fig. 2
Signal
"SRQ
GND
SERIAL
SERIAL CLK
SERIAL
•RESET
ATN
DATA
fixed
Serial Bus (Clocked
Table 1
In/Out
-
Note!:
-
In
In
In/Out
In
Note 2:
Note
serial
Pin No. 1
nected
The signal
designated as
The column
3:
direction
printer.
the
SERIAL 'SRQ is
this unit.
to
marked
of signal
with an asterisk
Aciive-Low.
"In/Out"
flow
refers
as
not con-
viewed
to
*
the
from
is
Description about
(3)
SERIAL
SERIAL ATN
SERIAL CLK:
interface
for this
(SERIAL
unit.
*RSQ
used
(SERIAL
is designated as
when
is in HIGH
it
A clock
nization
Moreover,
that
of this
-prior to
unit is ready for
the
signals of CN13
Service Request):
Attention):
device
clock.
function
level, the
signal
transferring data,
transmission.
for
When this
(device address
designated as a
is
data
transfer. All the
data
-D-6-
Interrupt
signal is
this signal
request to
in LOW level,
secondary
or
normal
data are
line
becomes
the host
the transferred data
address
one.
transferred with
HIGH
computer. Not
command) and
synchro-
level
to
indicate
Page 10
SERIAL DATA:
SERIAL CLK. The
after
data
the
*RESET: When
data
is received.
The
transfer,
this signal
data is
the receiving
This
transmitted
data is established
goes
to
becomes
LOW level,
onto
at the rise
side
sets this signal
HIGH level
this signal line with
edge of
line
to LOW level
when-
the
data
master
reset is performed
SERIAL
is
taken
syhchronization
CLK.
in.
on the
Moreover,
to indicate
printer.
of
that
-
-
D-7
Page 11
(4)
transfer sequence
Data
BYTE SENT UNDER ATTENTION
ATN
CLOCK
-
Tat^
DATA
ATN
\\\\\
END-OR-IDENTIFY HANDSHAKE ILAST BYTE IN
TALKER
cTockJUUVI
DATA
MSB
TS
TMe>
"*"
Th
LISTENER
READY-TO-SEND
-Jth
--Tv
LSB
DATA VALID
BB
*-Tvp
12 3
REAOY-FOR-DATA
TALKER SENDING
4
MESSAGE)
Lfiniiniumn
Tc--
-
T,
(TO 06VICES1
5 6 7
--T
RY
MSB
t-Tp-
TRk
LISTENER
NORMAL
DATA
BYTES
DATA-ACCEPTED
t
TALK-ATTENTION
ATN
="^jumri
DATA
MS8
TALKER
I
u
t
EOI-TIMEOUT
LISTENER
TURN AROUND (TALKER
"hi
Tdc
ITK
READY-FOR-DATA
-
DEVICE ACKNOWLEDGES IT IS
TALKER REAOY-TO-SEND
'DA
-A^H
BECOMES
READY-TO-SEND
TALKER SENDING
Tc
mrLTuuiJuui
NE
L3
LSELSB
DATA VALID
t
LISTENER READY-FOH-OATA
LISTENER,
STENER READYFOR.DATA
HANDSHAKE
LISTENER
>
TO LISTENER <
NOW
Liumjuiim
\
-~Js
t.
r0
LSB
READY FOR
CLOCK
DATA
-
HIGH, DATA LOW
MSB
LISTENER
T
^
SYSTEM LINE
-
TALKER)
TALKER
MSB
""nE
ummL
\
DATA-ACCEPTED
RELEASE
-D-8-
Page 12
.
Description
ATN RESPONSE (REQUIRED}'
LISTENER HOLD OFF
NON-EOI
BIT
DATA
RESPONSE TO RFD^
SET-UP
TALKER^
VALID
FRAME HANDSHAKE^ FRAME
BETWEEN
EOl RESPONSE TIME EOl RESPONSE HOLD TIME
TALKER RESPONSE
TO RELEASE
BYTES TIME
OF ATN
LIMIT Th y
BYTE-ACKNOWLEDGE^
Notes:
1
If maximum If maximum time
2.
If
maximum time
3.
4.
Ty
and
Tpp
time
exceeded, device not exceeded; exceeded, frame
minimum
must be
Table
2.
present error.
EOl response
error.
for external device
60
ms
Serial Bus Timing
Symbol Min.
Tat
Th
Tn
e
Ts
Tv
Tf
Tr 20fiS
Tb8
T"ye
Te.
TpR
required
20;iS 20;£S
60
fjs
/IS
20
be
to
talker.
a
Typ.
40
70
20 20
256
30
30
Max.
_
_
/is
/iS
/IS
^s
1000
oo
200
_
1000
ms
/iS
Axs
60
MS
;is
us
tJS
-
D-9-
Page 13
4. Specification
Setting DIP Switches
4-1.
Serial Interface
4-M. Setting of SW1
SWNo. Function
M
1-2
1-3
M
1-5
1-6
1-7
1-8
Valid only when
4-1-2.
Interface Select
ASCI 1 Translation PET
Control Code Mode
NLQ/Drafi
Device Select
Paper
End Detector Enable
Auto Line
Normal/Compressed Normal
Setting of SW2
Mode {SWl-1
OFF]
OFF
Serial
ASCII
Commodore
Draft
4
Feed* Disable
SWl-3 is "ON" Ignore If SWl-3 is
Compressed
"OFF".
ON
Parallel-
ASCII
Epson
Factory
NLQ
5 OFF
Disable
Enable
Setting
OFF OFF OFF OFF
OFF OFF OFF
Switch Function OFF
2-1
2-2
2-3
2-4
USA/UK/Neiherlands OFF
Select
International
Character
Unused
COUNTRY
See Below
Set
SW2-1
Denmark/Norway OFF
Sweden/Finland
Germany
France/Belgium ON
Italy ON
Switzerland
OFF
OFF ON ON
ON ON OFF
ON Factory Setting
OFF OFF
OFF
-
SW2-2 SW2-3
OFF
OFF OFF
OFF ON
ON OFF
OFF OFF
OFF ON
Spain
ON ON ON
r-
D-10-
Page 14
4-2.
Parallel Interface Mode
Note) Setting
of SW2-1
(SWl-1 ON)
through
SW2-4
is
unavailable.
4-3.
4-4.
4-5.
Switches SW1-1, 2 means the following:
SWNo.
Function
SW-M Interface Select
SW-1-2
Switches
SWl-4 SWl-3 Operation mode
OFF OFF mode 1
OFF ON mode
ON OFF mode
Adds line feed
SW1-3, 4 indicates the four operation
CR code Enabled
to
II
III AMIGA
ON ON mode IV IBM-PC
SW1-5, 6, 7,
8 means the
following according to the abovementioned operation mode:
ON OFF
Parallel
modes according to
Control Code
ESC/P
Serial
Disabled
its status:
t
4-5-1.
4-5-2.
mode
I
SWNo.
SW1-5 Codes
SWl-6 Font of zero
SWl-7 Print style
SWl-8 Condensed
in columns 8th and 9th Graphic character Control character
mode I
SW No.
SWl-5
Selection
SW1-6
(Refer to
SW1-7
SWl-8
Page length
Function ON OFF
Zero and slash
Correspondence
quality
mode 17CPI
Function ON
of international character
4-4-5.)
/
/
12 inches 1 1
Normal
Draft
lOCPl
OFF
inches
-D-n
-
Page 15
4-5-3.
modem
SW
No.
Function
ON
OFF
4-5-4.
4-5-5.
SWl-5 6/8
swi-e FONT
SWl-7
SW1-8
mode
Print Style
Condensed
IV
SWNo.
SWl-5
SWl-6
SWT-7
SW1-8
Selection of
IBM
6/8 LPI
IBM
Norway
Buffer-fult
international
LPI
of ZERO
mode
Function
character set
Denmark/
Version Character
process
character
Set
set
LPI
8
Zero and
NLQ
17CPI
SET
LP!
8
Enable
No
printir^
2
Slash
ON
LPI
6
Zero
Draft
10
6 LPI
CPI
OFF
SETT
Disable
Printing
mode II
SW7 SW6
OFF, OFF
OFF
OFF
OFF
OFF
ON OFF
ON
ON OFF
ON
ON
ON
OFF
ON OFF
ON
SW5
OFF
ON
ON
OFF
ON
.
USA
FRANCE
GERMANY
ENGLAND
DENMARK
SWEDEN
ITALY
ON SPAIN
Nation
-
D-12-
Page 16
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Commodore
Tel.:
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