Sams STAR NR-10 Mounting instructions

09068
HOWARD W. SAMS SiCOMPANY
COMPUTERFACTS8
Technical Service Data
STAR®
MODEL NR-10(VERSIONS 1,2,3)
PRINTER
FEATURES COMPLETE SCHEMATICS •PRELIMINARY SERVICE CHECKS •TROUBLESHOOTING TIPS •
EASY-READ WAVEFORMS •REPLACEMENT PARTS LISTS •SEMICONDUCTOR CROSS-REFERENCE

SflRSCOMPUTERFACTS STAR
MODEL NR-10(VERSIONS 1,2,3)
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PRELIMINARY SERVICE CHECKS
This data provides the user with atime-saving
service tool which is designed for quick Isola-
tion and repair of Printer malfunctions.
Check all Interconnecting cables for good
connection and correct hook-up before making
service checks.
Always turn Printer Off before connecting or
disconnecting connectors, boards or Computer.
Replacement or repair of the Fuse Board,
Control Board, Control Panel Board or
connectors may be necessary after malfunctions
have been Isolated.
TEST EQUIPMENT
Digital Volt/Ohm Meter
Logic Probe
TOOLS
Print Head Cleaning Equipment
Contact and Switch Cleaner (non-spray type)
Phil lips Screwdriver
Low Wattage Soldering Iron
Desoldering Equipment
REPLACEMENT PARTS AND DESCRIPTION
Control Board
Control Panel Board
Fuse Board
CM1 Carriage Motor
DB1 Bridge Rectifier
DB2 Bridge Rectifier
Fi Fuse 4A 125V AC (Fuse Board)
F2 Fuse 5A 125V AC (Main Board)
F1,3,4,5 Fuse 3A 125V DC (Main Board)
IC1 Voltage Regulator (5V)
LF1 Paper Feed Motor
Ml Home Position Sensor
M2 Paper End Sensor
M3 Release Lever Switch
M4 Automatic Sheet Feeder Switch
PH1 Print Head
SW1 Power Switch
T1 Power Transformer
TR1 Voltage Regulator 3.6V
TR2 Voltage Regulator 39V
XTAL1 14MHz Crystal
SAMS. Howard W. Sams &Co.
4300 West 62nd Street, P.O. Box 7092, Indianapolis, Indiana 46206 U.S.A.
The listing of any available replacement part herein does not
constitute in any case arecommendation, warranty or guaranty
by Howard W. Sams &Co. as to the quality and suitability of
such replacement part. The numbers of these parts have been
compiled from information furnished to Howard W. Sams &Co.
by the manufacturers of the particular type of replacement part
"sted. 90CP19104 DATE 2-90
Reproduction or use, without express permission, of editorial or pic-
torial content, in any manner, is prohibited. No patent liability is
assumed with respect to the use of the information contained herein.
©1990 Howard W. Sams &Co.
4300 West 62nd Street, P.O. Box 7092, Indianapolis, Indiana 46206
U.S.A. Printed in U.S. of America

PRELIMINARY SERVICE CHECKS (Continued)
POWER
SW1
120VAC
190mA AC
ADJUSTING
PLATE
SLOT
INTERCONNECTING DIAGRAM iNTERCONNECTING DIAGRAM
XI

PRELIMINARY SERVICE CHECKS (Continued)
CONTROL BOARD
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©CONTROL BOARD
III

PRELIMINARY SERVICE CHECKS (Continued)
GENERAL OPERATING INSTRUCTIONS
PRINTER SELF-TEST
Printer has ashort and along Self-Test.
Short Self-Test prints six lines of 80-column
text In Draft mode, then stops. Short test Is
started by loading paper and closing the
cover, then holding ON LINE button down while
turning Printer On. Long Self-Test prints
80-column text In Draft and Near Letter Quali-
ty modes In both Standard Roman characters and
Italic characters. The long test Is started
by holding PAPER FEED button down while turn-
ing Printer On. The long test continues
printing until Printer Is turned Off.
PANEL CONTROLS
Cover and Paper switches must be activated for
the printer to go ON LINER. When ON LINE
Indicator LED Is On, Printer Is ready to
receive data from Computer. The MODE, PRINT
PITCH, TOF, and PAPER FEED buttons are
disabled when Printer Is ON LINE. Pressing ON
LINE button once stops Printer from receiving
data from Computer and activates the other
buttons.
Each time MODE button Is pressed print mode
changes between DRAFT and NLQ. Pressing the
PRINT PITCH button cycles thru Proportional,
80, "96 and 136. MODE and PITCH selection Is
Indicated by Control Panel LEDS.
Pressing PAPER FEED button advances paper one
line. Pressing TOF button advances paper to
top of next page or form (Form Feed). Printer
has aforward and reverse microfeed function
to help in aligning the print start position.
To forward microfeed, put Printer Off Line
then hold ON LINE button down and press PAPER
FEED button. To reverse microfeed hold ON
LINE button down and press TOF button.
Margins can be set while printer If OFF LINE.
For left margin hold MODE down and press TOF
until the prlnthead reaches the desired posi-
tion. For right margin hold MODE down and
press PAPER FEED until prlnthead reaches the
desired position.
To make the current paper position the Top of
Form, hold PRINT PITCH down and press TOF.
To disable software control of MODE and PRINT
PITCH, hold either or both buttons down while
turning Printer On. Button selection will
work normally. To select Italic mode and
disable software control of character style,
hold the TOF button down while turning the
Printer ON.
Ahex dump can be performed by holding PAPER
FEED and MODE buttons down while turning
Printer On. Printer will print contents of
print buffer In hex form.
DISASSEMBLY INSTRUCTIONS
UPPER CASE UNIT REMOVAL
Remove Paper and Printer ribbon. Disconnect
power and remove the Platen Knob. Remove the
Interface cover, and remove the Parallel
Interface Board by pulling It straight up.
Remove the two screws securing the Upper Case.
Lift the back of the Upper Case slightly and
push it towards the front of printer to
separate the tabs of Upper Case from the Lower
Case. Disconnect chassis lead to Control
Panel and Connectors (CN2 and CN3). Remove
the Upper Case.
CONTROL PANEL BOARD REMOVAL
Remove the Upper Case unit, remove the tapping
screw securing the Cover Switch. Remove four
screws securing the control panel board.
Remove the Control Panel Board and the switch
out of the Upper Case unit.
PRINTER MECHANISM REMOVAL
Remove the Upper Case. Remove the plastic
door covering the ribbon cable and disconnect
the print Head Cable (CN11) from the Control
Board. Remove four screws securing the
Printer Mechanism to the Lower Case. Dis-
connect Connectors CN6, CN7, CN9 and CN10 from
the Control Board. Lift the Printer Mechanism
out of Lower Case.
CONTROL BOARD REMOVAL
Remove the Printer Mechanism and disconnect
the power supply connector CN1. Disconnect
the Fan connector CN4. Remove eight screws
fastening the Control Board to Lower Case.
Lift the Control Board out of the Lower Case.
PAPER FEED MOTOR REMOVAL
Remove the Printer Mechanism. Remove two
screws holding the Paper Feed Motor to the
Printer Mechanism. Remove the Paper Feed
Motor.
CARRIAGE MOTOR REMOVAL
Remove the Printer Mechanism. Remove four
screws securing the Carriage Motor Holder to
Printer Mechanism. Remove two screws fasten-
ing the carriage motor to holder and remove
carriage motor. When the carriage motor Is
replaced, adjustment of Timing Belt Tension Is
required.
PRINT HEAD
Remove the Printer Cover and ribbon cartridge.
Remove the hook holding the Print Head In
place and pull up the Print Head. Remove the
Print Head Connector Cover mounted to the
frame, then remove the Print Head Cable
connected to CN11 on the Control Board. When
anew Print Head is installed, perform the
Print Head Gap Adjustment.
IV

PRELIMINARY SERVICE CHECKS (Continued)
MISCELLANEOUS ADJUSTMENTS
PRINT HEAD GAP
Set Adjustment Lever to position 1. Measure
gap between Platen and Ribbon Guide with
Carriage Assembly at center, left end, and at
right end. All three measurements should be
0.20mm to 0.25mm. See Figure A. If any mea-
surement Is out of tolerance, loosen Adjust-
ment Lever Nut. Insert asmall rod Into hole
at left end of Rear Carriage Shaft, see Figure
B. To adjust right end gap, rotate Rear
Carriage Shaft, with rod, until proper gap
measurement Is obtained. To adjust center and
left end gap, hold Rear Carriage Shaft In
position with rod, and rotate Left Adjustment
Bushing until proper gap measurement is
obtained. After adjustment is complete,
tighten Adjustment Lever Nut, while ensuring
that Left Adjustment Bushing and Rear Carriage
Shaft do not move.
TIMING BELT TENSION
Set Adjustment lever to position 1, see Figure
A. Position Carriage Assembly to right end.
Check Timing Belt Tension for 25+4g (3/4 to 1
oz) to deflect the back length of the timing
belt 5/64" to the front, measured 5Inches to
the right of the center of the Timing Pulley.
If measurement is not correct, loosen screw
securing Adjusting Plate, see Figure C.
Insert acommon screwdriver Into slot on
Adjusting Plate and adjust until proper Timing
Belt tension Is obtained. Tighten adjusting
Plate Screw.
ADJUSTMENT
LEVER
FIGURE A
0.20mm To 0.25mm
POSITION 1
PLATEN
ADJUSTMENT N.
BUSHING
ADJUSTMENT
LEVER NUT
RIBBON
GUIDE
FIGURE C
ADJUSTING PLATE TIMING BELT 25±4g.
ADJUSTING PLATE
SLOT j^y
ADJUSTING PLATE
SCREW
HOME POSITION DETECTOR
FIGURE B
LEFT ADJUSTMENT
BUSHING
RIBBON GUIDE
REAR CARRIAGE
SHAFT HOLE REAR CARRIAGE
SHAFT
Initiate Printer Self Test. Left margin
should be In line with "0" on Ball Roller
Scale ±lmm. If left margin Is out of
position, loosen Home Position Detector Screw.
Reposition Home Position Detector so left
margin Is properly positioned, see Figure D.
Tighten Home Position Detector Screw.
FIGURE D
1mm 1mm
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CARRIAGE
ASSEMBLY
FRONT CARRIAGE SHAFT
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PRELIMINARY SERVICE CHECKS (Continued)
SWITCHES AND JUT
DIP SWITCH SETTINGS
"Caution": Do not change the Dip Switch
setting when the prfnter or connected computer
power Is "ON".
DSW1-1 If. "ON" the printer will stop printing
when It runs out of paper. If "OFF" this
switch disables the paper out detector*
DSW1-2 If "ON" the SELECT IN signal of the
parallel Interface Is held low. If "OFF" the
SELECT IN signal Is controlled by host
computer (when High, printer cannot accept
data )
.
DSW1-3 If "ON" the down load character
definitions are Ignored and the RAM Is used as
aprint buffer. If "OFF" the down load
character definitions are enabled and the
buffer Is reduced to one line.
DSW1-4 If "ON" the default line spacing is set
to 1/6 Inch. If "OFF" the default line
spacing Is set to 1/8 inch.
DSW1-5 If "ON" Line Feed Is required from the
host computer. If "OFF" one Line Feed is auto-
matically performed with every carriage
return.
DSW1-6 If "ON" bottom margin Is not set at
Power On. If "OFF" bottom margin Is set to
one Inch.
DSW1-7 If "ON" the default pitch Is normal
Pica pitch (10CPI). If "OFF" the default
pitch Is condensed Pica pitch (17CPI).
DSWJ-8 If "ON" the zeros will be printed
without slashes. If "OFF" the printer will
print slashed zeros.
DIP SWITCH 2
DSW2-1 If "ON" the default "character style Is
normal draft. If "OFF" the default character
style Is set to Near Letter Quality.
DSW2-2 If "ON" the printer emulates the Epson
FX-85 printer (Standard). If "OFF" the
printer uses the "IBM" compatible mode.
DSW2-3 If r
ON" and DSW2-2 Is "OFF", the
printer emulates IBM-P (Propr Inter 5. If "OFF"
and DSW2-2 Is "OFF", the printer emulates
IBM-G (Graphic printer).
DSW2-4 This switch function depends on the
setting of Switch DSW2-2. If DSW2-2 "ON":
DSW2-4 "ON" sets MINIMUM line feed value to
1/216 inch, DSW2-4 OFF sets MINIMUM line feed
value to 1/144 Inch.
If DSW2-2 Is 0FF:DSW2-4 "ON" selects
Character Set #1, OFF selects Character Set
#2.
DSW2-5 If "ON" the print head will return to
the left margin after the paper advance. If
"OFF" the print head will not return to the
left margin after the paper advance.
DSW2-6 thru 2-8 will select the default
International character set. See Chart.
DIP Switch 1
DIP Switch 2
The DIP Switches are located under the Printer Cover
International Character Sets
Courtesy of Manufacturer
SWITCH USA FRANCE [
GERMANY |ENGLAM) DENMARK SWEDEN ITALY SPAIN
2-6 ON OFF ON OFF ON OFF ON OFF
2-7 ON ON OFF OFF OH ON OFF OFF
MON ON ON ON OFF OFF OFF OFF
VI

PRELIMINARY SERVICE CHECKS (Continued)
SERVICE CHECKS
MATCH THE NUMBERS ON THE INTERCONNECTING DIAGRAM AND PHOTOS WITH
THE NUMBERS ON THE SERVICE CHECKS TO BE PERFORMED.
©PRINTER DEAD
(A) Verify connection of chassis slip
connector to pin on Control Panel
Board. Check Cover Open Detector
switch (SW8) for closed continuity,
and Control Board connector CN3, pin
11 for ground when SW8 is closed.
(B) CAUTION: If printer is still turned
on, Printhead may be hot. Turn off
printer and disconnect printhead
cable from Control Board. Secure
printhead cable to carriage and
start printer self test. If
carriage travels as it should in
self test, check Printhead by substi-
tution.
(C) Check AC Fuse on Fuse board. If
open check Power Transformer (Ii
)
for possib le short.
(D) If AC Fuse is good, check for 120VAC
between pins of Transformer Con-
nector on Fuse Board. If voltage Is
missing, check Fuse Board by substi-
tution.
(E) Check for 30.2VAC between pins 1and
2and 5.2VAC between pins 3and 4of
connector CN1. If either voltage Is
missing, check Power Transformer
(T1) by substitution.
(F) Check for 39V at both ends of Fuses
(F1,F3,F4,F5) and 4.4VAC at Fuse
(F2) on the Control Board.
(G) Check for 8.9V at the collector of
Regulator Transistor (TR1).
(H) If 8.9V is missing check Diode
Bridge (DB2).
(I) Check for 5V at the output of ICI,
if 5V is missing check ICI by sub-
stitution.
(J) Check for 3.6V at the emitter of
Regulator (TR1). If 3.6V is
missing, check transistor TR1 and
Zener Diode (ZD1 )by substitution.
(K) Check for 36.8V at the emitter of
TR2.
(L) Check for pulses at pins of XTAL1.
If pulses are missing check XTAL1 by
substitution.
©CARRIAGE ASSEMBLY DOES NOT OPERATE
(A) If carriage assembly moves, then
stops and alarm buzzer sounds, check
connectors CN10 and CN7. Check
voltage at CN7 Pin 8for over 1V
with paper loaded and under .2V wlth^}
no paper. Check CN7 Pin 5for over ^m
,5V when the Home Position Sensor *»
(Ml) Is clear and under .25V when Oj
the sensor is blocked. ""^i
(B) Check the timing belt.
(C) Check Carriage Motor winding ®
resistances. Check the motor by sub- ^
stitution. r
35
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(D5 Check Control Board by substitution.
©PAPER FEED MOTOR MALFUNCTIONING
(A) Check Paper Feed Gear Assembly.
(B) Check Paper Feed Motor.
(C) Check Connector CN9.
(D) Check Control Board by substitution.
©PRINT HEAD MALFUNCTIONING
(A) Check Print Head for damage or
contamination.
(B) Check the resistance of Print Head
solenoids.
WARNING; Shorted Driver can damage Prtnt
Head. Check Drivers for short before re-
placing the Print Head.
@PRINTER WILL NOT RECEIVE DATA
(A) Check interface Board and cable.
CB) Check connector CN8 on Main Board.
(C) Check Control Board by substitution.
©CONTROL PANEL MALFUNCTIONS
(A) Check connectors CN2 and CN3 on
Control Board.
(B) Check Control Panel Board by substi-
tution.
(C5 Check Control Board by substitution.
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PRELIMINARY SERVICE CHECKS (Continued]
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APER FEED CARRIAGE COVER OPEN
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VIII

PRELIMINARY SERVICE CHECKS (Continued)
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IX

PRELIMINARY SERVICE CHECKS (Continued)
CONTROL BOARD
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CONTROL BOARD
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PRELIMINARY SERVICE CHECKS (Continued)
POWER
SW1
120VAC
190mA AC
ADJUSTING
PLATE
SLOT
INTERCONNECTING DIAGRAM iNTERCONNECTING DIAGRAM
XI

PRELIMINARY SERVICE CHECKS (Continued)
PREVENTATIVE MAINTENANCE
ENVIRONMENT
Computers perform best in aclean, cool area that is below 80 degrees Fahrenheit and free of
dust and smoke particles. Even though home Computers are not affected by cigarette smoke
as much as commercial Computers are affected, it is better to mantain asmoke-free area
around the Computer. Do not block cabinet vents of Computer, Monitor, Printer, or other
power devices.
ELECTRICAL POWER
Variations in the line voltage can affect the Computer. Try to avoid these fluctuations by using
an AC receptacle that is on apower line not used by appliances or other heavy current demand
devices. Apower-surge protector, power-line conditioner, or non-interruptable power supply
may be needed to cure the problem. Do not switch power On and Off frequently.
KEYBOARD
Liquids spilled into the Keyboard can ruin it. Immediately after aspill occurs, disconnect the
Computer power plug from AC power outlet. Then, if circuitry or contacts are contaminated,
disassemble the Keyboard and carefully rinse the Keyboard printed circuit board with distilled
water and let it dry. Use acotton swab to clean between the keys. Use a non-abrasive contact
cleaner and lint-free wipers on accessible connectors and contacts.
DISK DRIVES
Clean the read/write heads of the Disk Drives about once amonth or after 100 hours usage.
Use only an approved head cleaning kit.
Handle carefully to preserve proper disk head alignment. Asudden bump or jolt to the Disk
Drives can knock the disk head out of alignment. If Disk Drive must be transported, place an
old disk in slot and close door during transport.
Store disks in their protective covers and never touch the disk surface. Observe the disk
handling precautions usually found on the back of disk protective covers.
PRINTERS
Carefully vacuum the Printer regularly. Wipe surface areas clean using alight all-purpose
cleaner. Do not oil the machine. The oil will collect abrasive grit and dust. The dust will act as
ablanket. This can cause components to overheat and fail.
STATIC ELECTRICITY
Static electricity discharge can affect the Computer. In order to minimize the possibility, use
anti-static mats, sprays, tools and materials, and maintain good humidity in the Computer en-
vironment.
MONITOR
Use an isolation transformer with any Monitor that does not come as part of the system since
some Monitors use aHOT chassis (chassis connected to one side of the AC line). The face of
the Monitor should never be left on for long period of time at high brightness level except when
pattern is being changed periodically. Use caution when cleaning anti-glare screens, to
preserve the glare-reduction feature.
Xli

SAMSCOMPUTERFACTS STAR
MODEL NR-10(VERSIONS 1,2,3)
Star Micronlcs Printers are warranted for one year from date of purchase. If any
service or modifications are performed during this time by other than Authorized
Star Micronics Service Centers, the manufacturers' warranty will be void.
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SAFETY PRECAUTIONS
See Page 13.
PRELIMINARY SERVICE CHECKS
ENCLOSED
INDEX
Page
Block Diagram 21
Disassembly Instructions ,14
Exploded Views 35,37,40,41,42
General Operating Instructions.... 14
GridTrace Location Guide
Control Board.... 44
Terminal Guides 34
Line Definitions..... ,43
Logic Charts 18, 19
Miscellaneous Adjustments 15
Parallel Interface 33
Parts List 25 thru 32
Mechanical 36,38,39,40,41,42
Page
Photos
Chassis-Overall View 23
Control Panel Board 24
Control Board... 11,12,45,46
Fuse Board. ..
.' 22
Parallel Buffer Board 22
Pr inter Se If-Test 30
Safety Precautions 13
Schematics 2thru 10, 47 thru 57
Schematics Notes 43
Serial Interface 33
Switches and Jumpers 20,39
Test Equipment 16
Troubleshooting 16,17
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SAMS Howard W. Sams &Co.
4300 West 62nd Street, P.O. Box 7092, Indianapolis, Indiana 46206 U.S.A.
The listing of any available replacement part herein does not
constitute in any case arecommendation, warranty or guaranty
by Howard W. Sams &Co. as to the quality and suitability of
such replacement part. The numbers of these parts have been
compiled from information furnished to Howard W. Sams &Co.
by the manufacturers of the particular type of replacement part
"sted 9QCP1 91 04 DATE 2-90
Reproduction or use, without express permission, of editorial or pic-
torial content, in any manner, is prohibited. No patent liability is
assumed with respect to the use of the information contained herein.
©1990 Howard W. Sams &Co.
4300 West 62nd Street, P.O. Box 7092, Indianapolis, Indiana 46206
U.S.A. Printed in U.S. of America

APHOTOFACT STANDARD NOTATION SCHEMATIC
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