Sharp PR-45M User manual

SERVICE MANUAL
THERMAL PRINTER
MODEL PR-45M
PR-45M : MANUAL CUTTER
CHAPTER 1. SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CHAPTER 2. OUTLINE OF DRIVING CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . 3
CHAPTER 3. HANDLING THE PRINTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CHAPTER 4. MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CHAPTER 5. TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CHAPTER 6. DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . 12
CHAPTER 7. PWB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PARTS GUIDE (Ki-OB2359BHZZ)
APPLICATION MODEL (As of Dec.)
ER-A455X Series, ER-A450/A450S ("V" Version), ER-A450T ("U" and "A" Version)
CONTENTS
SHARP CORPORATION This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

CHAPTER 1. SPECIFICATIONS
2. Specifications
1) Printer
Item Description
No. of station 2: Receipt and Journal
Validation No
Printing system Line thermal
No. of dot Receipt: 288 dots
Journal 288 dots
Dot pitch Horizontal: 0.125 mm
Vertical: 0.125 mm
Font 10 dots (W) ×24 dots (H)
Printing capacity Receipt: Max. 24 characters
Journal: Max. 24 characters
Character size 1.25 mm (W) ×3.0 mm (H): At 10 ×24 dots
Print pitch Column distance: 1.5 mm
Row distance: 3.75 mm
Paper feed speed Approximate 50 mm/s
Reliability Mechanism: MCBF 5 million lines
Thermal head: 5 million pulses
Paper end sensor Yes (Receipt and Journal)
Cutter Manual
Paper near end sensor No
Printing area
0.125 (4.5)
(4.5) (4)
288dots
(36)
44.5 ±0.5 3.0
(4)
UNIT: mm

Item Description
Printing format 12 ×24 font
2) Tools required for maintenance and repair
For NAME Remarks
Mainrenance Cleaning brush
Cotton swab
Clean cloth
Alcoholic solvent Ethanol, Methanol, IPA
Cleaning brush
Repair (+) Screwdriver
(-) Screwdriver
Tweezers
Pliers
Nippers
Soldering iron
ET holder
Grease : G-36 00BB703600001
Cleaning brush
Cotton swab
Clean cloth
Alcoholic solvent Ethanol, Methanol, IPA
Cleaning brush
1.5 (12dots) 1.5 (12dots)
0.125
0.125
3.0 (24dots)
3.75 (30dots)
3.75 (30dots)
UNIT: mm

CHAPTER 2. OUTLINE OF DRIVING
CIRCUIT
1. Block diagram & Connection diagram
1) Block diagram
2) Connector table
Connect to the ECR PWB
CON1: <For ECR PWB>
PinNo. Signal Pin
No. Signal Pin No. Signal Pin No. Signal
1VHIN 2NC 3NC 4NC
5 VJCOM 6 VJPFD 7 /JPFA 8 /JPFB
9 /JPFC 10 /JPFD 11 /JPES 12 GND
13 GND 14 GND 15 TM 16 VDD
(+5V)
17 /STB4 18 /STB3 19 Din 20 VH
21 VH 22 VH 23 VH 24 Dout
25 CLK 26 /LAT 27 /STB2 28 /STB1
29 GND 30 GND 31 GND 32 /RPES
33 VRCOM 34 VRCOM 35 /RPFA 36 /RPFB
37 /RPFC 38 /RPFD 39 PHUPS 40 VHOUT
CON2: <For Thermal head connector A>
Pin
No. Signal Pin No. Signal Pin No. Signal
1VH 2VH 3Dout
4 CLK 5/LAT 6/STB3
7 /STB1 8GND 9GND
CON3: <For Thermal head connector B>
Pin
No. Signal Pin
No. Signal Pin
No. Signal
1GND 2GND 3NC
4 TM 5 VDD (+5V) 6 /STB4
7/STB3 8Din 9VH
10 VH
CON4: Not used
CON5: <For Head up detector>
Pin
No. Signal Pin No. Signal
1 PHUPS 2 GND-L
CON6: <For Journal paper feed motor>
Pin
No. Signal Pin No. Signal Pin No. Signal
1VJCOM 2VJCOM 3/JPFA
4/JPFB 5/JPFC 6/JPFD
CON7: <For Receipt paper feed motor>
Pin
No. Signal Pin No. Signal Pin No. Signal
1 VRCOM 2 VRCOM 3 /RPFA
4/RPFB 5/RPFC 6/RPFD
3) Thermal head block diagram
Thermal head connector A
Pin No. Signal Description
1 VH Head application voltage
2
3 D out Data output signal
4 CLK Clock signal
5 /LAT Latch Signal
6 /STB2 Strobe Signal 2
7 /STB1 Strobe Signal 1
8 GND GND
9
Thermal head connector B
Pin No. Signal Description
1 GND GND
2
3 TM Thermistor detecting signal
4VDD +5V
5 /STB4 Strobe Signal 4
6 /STB3 Strobe Signal 3
7 D in Data input signal
8 VH Head application voltage
9
Print data which has been entered through Din signal synchronization
with the CLOCK signal is stored in /LAT according to the timing (864
dots) of the /LATCH signal. Stored print data is output by the
/STROBE1, /STROBE2, /STROBE3, and /STROBE4 signals to ener-
gize the heating element. The print data (864 dots) is divided by four
STROBE signals into the following four parts before being output.
J
MOTOR
6
CON6(6P)
CON4(4P)
R
MOTOR
6
CON7(6P)
HEAD UP
SENSOR
CON5(2P)
FOR ECR PWB
CON2(9P)
Non-paper
detection
sensor(J)
FOR THERMAL HEAD FOR THERMAL HEAD
CON3(9P)
CON1(40P)
PWB UNIT
Non-paper
detection
sensor(R)
VH 8, 9
GND 1, 2
STB4 5
4 3
STB3 6
DI 7
VDD 4
TM 3
Connector B
THERMISTOR
VH
1, 2
GND
8, 9
STB1
7
12
STB2
6
DO
3
CLK
4
Connector A
SHIFT REGISTER
LAT
5
LATCH REGISTER
DOT #1
DOT #864
The STB terminal is pulled
in the IC.

STROBE No. DOT No. Dots/Strobe Note
/STROBE4 577 ∼864 288 Excluding dots No.1 ∼88,
377 ∼488 and 777 ∼864
/STROBE3 433 ∼576 144
/STROBE2 289 ∼432 144
/STROBE1 1 ∼288 288
4) Motor block diagram
<JOURNAL MOTOR>
PIN
No. SIGNAL NAME DESCRIPTION
1VJCOM COMMON voltage
2
3/JPFA
JOURNAL-side paper feed motor phase A
driving signal
4/JPFB
JOURNAL-side paper feed motor phase B
driving signal
5/JPFC
JOURNAL-side paper feed motor phase C
driving signal
6/JPFD
JOURNAL-side paper feed motor phase D
driving signal
<RECEIPT MOTOR>
PIN
No. SIGNAL NAME DESCRIPTION
1VRCOM COMMON voltage
2
3/RPFA
RECEIPT-side paper feed motor phase A
driving signal
4/RPFB
RECEIPT-side paper feed motor phase B
driving signal
5/RPFC
RECEIPT-side paper feed motor phase C
driving signal
6/RPFD
RECEIPT-side paper feed motor phase D
driving signal
The paper feed motors are stepping motors with 4-phase driving
coils. The motors are driven by switching over the driving coils.
<MOTOR DRIVE SEQUENCE> ON: Energized/OFF: Not energized
JOURNAL MOTOR
STEP No. PHASE A PHASE B PHASE C PHASE D
1ONOFFOFFON
2ONOFFONOFF
3 OFF ON ON OFF
4OFFONOFFON
RECEIPT MOTOR
STEP No. PHASE A PHASE B PHASE C PHASE D
1ONOFFONOFF
2ONOFFOFFON
3OFFONOFFON
4 OFF ON ON OFF
5) End sensor block diagram
SIGNAL NAME DESCRIPTION
+5V +5V
/RPES Receipt paper end sensor detecting signal
/JPES Journal paper end sensor detecting signal
GNDL GND
The photo diode on the PWB detects the presence/absence of the
paper passing under the journal and receipt platens.
6) Head up sensor
SIGNAL NAME DESCRIPTION
PHUPS Head-up detecting signal
GNDL GND
The micro switch at the left side of the printer detects the head-up
state.
ON: Head-down
OFF: Head-up
AB
C
D
M
/RPFA, /JPFA
/RPFB, /JPFB
/RPFC, /JPFC
/RPFD, /JPFD
VRCOM, VJCOM
VRCOM, VJCOM
stepping motor
+5V
/RPES, /JPES
GND-L
1
2
34
39KΩ220Ω
reflex photo sensor
0.1µF
GND-L
PHUPS
micro switch

CHAPTER 3. HANDLING THE
PRINTER
1 Special Handling Considerations
(1) When transporting the printer
•When transporting the printer, the head up lever should be raised
in the B: Head up position so that the head does not contact the
platen rollers.
Failure to do so will may result in pear the printer performance.
•When the printer is carried, it should not be held at the connectors,
the lead wires, paper take-up frame, etc.
•When carrying the printer, never allow large impacts to occur, such
as by dropping, collision, etc.
•When carrying the printer, hold the frame with both hands, as
shown in the figure below.
Fig. Carrying the printer unit
•When transporting the printer, pack it using anti-static packaging.
Do not touch the thermal head and the surface of the PWB. When
handling the printer, properly ground yourself.
Head up lever position
:Close position
The head is in contact with the platen roller
The printer operates and feeds the paper.
The illustration shows the state when the PT-cover is removed
for explanation purposes only.
Fig. Close position
:Head-up position
The head is not in contact with the platen roller.
When the printer is out of service for a long time or when it
is to be transported.
The illustration shows the state when the PT-cover is removed
for explanation purposes only.
Fig. Head-up position
:Cleaning position
When the head and platen roller are to be cleaned.
Do not leave the head-up lever in this position; Failure to do
so might result in a deformed H-spring, thus leading to poor
print or paper feed quality.
The illustration shows the state when the PT-cover is removed
for explanation purposes only.
Fig. Cleaning position
Head
Head Up Lever H-Spring
Platen roller
(In contact)
H-Spring
Head
Head Up Lever
Platen roller
H-Spring
Head
Head Up Lever
Platen roller

(2) When storing the printer
Printer
•When storing the printer, make sure to raise the head up lever
in the : Head up position. Never store it with the : Close
position or : Cleaning position.
•Avoid storing the printer in areas with a lot of dust, direct sun-
light, or high humidity.
•If the printer is stored for an extended period, put it in a anti-
static bag and store it in a dry place.
•The thermal paper should not be left for an extended period
(more than two weeks at normal temperature) held between
the platen roller and the head ( : Close position).
•Do not leave the printer in the : Checking position for more
than 2 days.
Paper (thermal paper)
•Since thermal paper gradually darkens from about 70°C, pay
attention to heat, humidity, sun light, etc., regardless whether or
not the paper has been printed on.
•Avoid high temperature and high humidity areas.
•Avoid direct sun light.
(When thermal paper is left near the window in direct sun
light, the base color may change and discoloring may take
place.)
(3) When using the printer
Printer
•Since the printer contains a thermal head, permanent magnets
(motor) and micro switches, avoid using it in areas with a lot of
iron powder, dust, etc.
•Never operate with no paper loaded.
•Never pull out the paper (forward or backward) with the head
head against the platen rollers.
•Do not touch the head heating elements and driver Ics, espe-
cially with hard or metal objects.
•During printing and just after printing completes (for about 15
minutes), the area around the head and the motor surface are
very hot. Never directly touch them with your hand.
•Operate the head up lever only when required.
Never touch the surface of the head heating elements.
(Dirt may stick to the heating elements and affect the printing.)
•Never leave the printer with the platen rollers and the head
directly touching ( : Close position).
Do not leave the head-up lever in the : Cleaning position for
more than 2 days.
(When the printer is left for a while, make sure to raise the head
up lever in the ➡: direction in Fig. Loading paper.)
•Since electronic parts are used in the print head, never touch
the thermal head with your bare hand.
Before handling the printer, execute proper body grounding
procedures to avoid static electricity.
Paper (thermal paper)
•Use only the specified thermal paper.
(Thermal paper with a rough surface may result in poor printer
quality and shorten the print head life.)
(4) When mounting the printer
•Make sure the power is turned OFF before installing the printer to
an ECR.
•When attaching the printer to your product, avoid areas with a lot
of iron powder, dust, etc.
2. Loading the Paper (insertion and
removal)
Use only the paper specified in the specification sheet issued by our
company.
(1) Loading paper
Load paper following the procedure below.
Cut the edge of the paper as shown in the figure below.
Fig. Shape of the cut paper edge
Fig. Paper setting state
Fig. Loading paper
Turn the ECR ON.
Make sure the head-up lever in the (Close) position.
Insert the paper through the paper inlet.
The paper is automatically loaded into the printer by the auto
loading mechanism and the leading edge of the paper roll is deliv-
ered a little from the paper outlet.
If there is slackness in the paper or paper is loaded slantly, set the
head up lever in the head up position and adjust the paper
position.
If the length of the paper delivered from the outlet is insufficient,
feed the paper properly with the key board of the ECR.
(Notes) If paper is fed without following the above procedure, it
could cause improper paper feeding and jamming.
Good WrongGood Wrong
Good Bad
A
B
C
Recording paper Head up lever

(2) Unloading the paper
The paper can be unloaded in two ways.
Move the head up lever toward : Head up position and then pull
the paper out by hand in the forward direction (feeding direction)
or in the reverse direction.
Operate the paper feed mechanism to discharge the paper from
the printer. Move the head up lever to the head up position and
remove the paper toward the front.
(Notes) •Operations other than those listed above could cause im-
proper paper feeding and jamming, and could cause
breaking of the head heating elements.
•Never pull the paper out without using the head up lever,
regardless of the direction, forward or reverse.
(3) Removing paper after a paper jam
If a paper jam occurs, follow the procedure below.
Put the head-up lever in the Cleaning position to widen the
spacing between the head and platen rollers so that you can
easily check for a paper jam.
Remove a jammed paper by hand.
Return the head-up lever in the Close position.
When a tool such as tweezers, is used to remove paper chips, take
care not to touch the heating elements of the head with the tool.
Since the head is still hot just after the operation printing is stopped,
wait a while for the head to cool down.
CHAPTER 4. MAINTENANCE
To maintain proper performance of the printer for a long period of
time and to prevent trouble, carry out the maintenance and manage-
ment procedures as follows.
1. Cleaning
•Removing stains
Wipe dirt off the head and platen rollers with a clean cloth satu-
rated with an alcoholic solvent (ethanol, methanol, IPA: Isopropyl
alcohol).
For cleaning the head part, refer to daily checks.
(Notes) Never use thinner, benzine, trichlene or ketone group sol-
vents, since they may damage or deteriorate rubber and
plastic parts.
•Removing dust and fuzz
Cleaning by suction (with a vacuum cleaner) is desirable.
Suck up all the dust and fuzz.
(Notes) Check lubrication at various points after cleaning, and lubri-
cate with oil at the specified locations.
2. Inspection
The maintenance and inspection items for the printer are dividend
into 2 types. One is "Daily checks" for the person who uses the
printer, and the other is "Periodic checks" for someone with more
technical knowledge. Maintenance and inspections should be carried
out by properly qualified personnel.
(1) Daily checks
Check that the printer is used properly and kept in the good repair.
Daily check items
The specified paper is being used.
The paper has not become discolored.
Check print quality and if significant deterioration is found, clean
the head heating elements.
<Head cleaning method>
1) Place the head-up lever in the : Cleaning position. Make sure it
is securely locked.
2) Wipe the heating element of the head and platen rollers clean with
a soft cloth or cotton pledget moistened with alcoholic solvent
(ethanol, methanol or IPA: isopropyl alcohol).
3) After making sure the alcoholic solvent has thoroughly evapo-
rated, undo the head-up lever and platen rollers in the Close
position.
If paper dust is attached to the platen roller surface, the paper
feeding power is reduced. Be sure to clean the platen roller sur-
face when cleaning the head.
The illustration shows the state when the PT-cover is removed for
explanation purposes only.
Fig. Head and Platen roller cleaning
Cotton swab Platen roller
Thermal head unit

(2) Periodic checks
Check the items listed in the table below every 6 months, and correct
any problems.
Table of periodic checks
No. Check items Standard Procedure
1 Dust, fuzz and dirt
sticking to various
parts.
•The mechanism should not have a lot of dirt, fuzz or dust on its
surface. Foreign substances should not be allowed to collect. •Clean the unit with a vacuum cleaner.
•The paper guide should not be clogged with paper chips, etc. •Remove paper chips with a tweezers.
2 Lubrication •See "Chapter 6". •Refer to "Chapter 6" For lubrication.
3 Operational check •Printing is operated without abnormality. •See "Chapter 5".
•Feeding operated without abnormality.
•Observe respective functions. Abnormal operation caused by parts
wear, deformation, bending, etc., do not exist. •See "Chapter 5" and "Chapter 6".
CHAPTER 5. TROUBLESHOOTING
Troubleshooting and repair of the printer is classified into two levels
(A and B), depending on the difficulty of the repair.
Persons undertaking a repair should consider their level of technical
skill and the level of the repair before attempting to ensure that the
trouble is handled correctly.
1. Repair Levels
Level A: This requires general knowledge about the operating princi-
ples and structure of the printer, along with technical skill
and minimum experience.
Level B: This requires full knowledge of the operating principles and
structure of the printer, adequate technical skill, and repair
experience.
2. Repair Procedures
If trouble occurs, observe the symptoms, determine the cause by
referring to Section 3 "Repair Guidelines," and repair it. The "Repair
Guidelines" are divided into the following five columns so that any
trouble can be analyzed and a solution found.
•Problem
Check for symptoms.
•Condition
Compare the problem with the examples given in this column and
determine if they match.
•Cause
Causes that can be assumed for the problem are listed.
Determine the cause. Also, refer to the repair level indicated for
each cause.
•Checkpoints and Checking Method
How to check for the cause of a problem is listed. Check the
defective part as instructed in this column.
•Repair Method
Repair the defective part as instructed in this column. If the same
problem occurs after the repair, check the other causes in the
"Cause" column again, and repair accordingly.
3. Repair Guidelines
Phenomenon Condition Cause Level Checkpoints and
Checking Method Repair Method
1. Printing is
not executed. Nothing is printed. (1) The Head cable is disconnected. A•Verify that the Head cable is properly connected. •If the FFC-head is not properly connected,
connect it firmly.
(2) The common or signal line of
the Head cable is broken. B•Check the common and signal lines of the Head
cable for continuity.
•If continuity cannot be
confirmed, replace the
Head cable.
(3) The printhead does not
contact the platens. A•Verify that the head up lever is set to the proper
position.
•Set the head up lever to
the printing position.
(4) The input pulse is defective B •Verify with the oscilloscope
that the input pulse is
within the specified range.
•If the input pulse is not
generated or is not within
the specified range, adjust
the drive control circuit.

Phenomenon Condition Cause Level Checkpoints and
Checking Method Repair Method
2. Dots are
missing
continuously.
A specific dot is
not printed. (1) A foreign substance is attached to the heating
elements of the printhead.
A•Verify that nothing is
attached to the heating
elements of the printhead.
•Clean the heating elements
of the printhead.
(2) The heating elements of the
printhead are damaged. B•Verify that the heating elements of the printhead
are not damaged.
•If the heating elements are
damaged, replace the
thermal head.
(3) The signal line of the Head
cable is broken. B•See Cause (2) of Phenomemon 1.
(4) The input pulse is defective. A •See Cause (4) of Phenomenon 1.
3. Dots are
missing
occasionally.
Dots are
missing
occasionally or
the color of
some dots
becomes light.
(1) A foreign substance is
attached to the surface of
each platen roller.
A•Verify that nothing is
attached to the surface of
each platen roller.
•Clean the surface of each
platen roller.
(2) The surface of each platen
roller is deformed. A•Verify that the surface of each platen roller is not
deformed.
•If deformation is found,
replace the corresponding
platen roller ass’y.
(3) A foreign substance is
attached to the heating
elements of the printhead.
A•See Cause (1) of Phenomenon 2.
(4) The heating elements of the
printhead are damaged. B•See Cause (2) of Phenomenon 2.
4. The printing
color is light. The overall printing color is
light.
(1) The head up lever position is
not correct. A•Verify that the head up lever is set to the correct
position.
•Set the head up lever to
the printing position.
(2) Displaced or deformed
H-springs. A•Make sure the H-springs are correctly installed and
not deformed.
•If they are not correctly
installed, reinstall properly.
Replace any deformed
H-spring with a new one.
(3) The H/C frame is warped. B •Verify that the H/C frame is
not warped. •If the H/C frame is warped, replace the head mounting
deck ass’y.
(4) The surface of the platen is
deformed. A•See Cause (2) of Phenomenon 3.
(5) The heating elements of the
printhead have deteriorated. B•Verify that the heating elements of the printhead
have not deteriorated.
•If any deterioration is
found, replace the thermal
head.
(6) The input pulse is defective. A •See Cause (4) of Phenomenon 1.
(7) The roll paper is of poor
quality. A•Verify that the specified-roll paper is being used. •Use the specified quality paper.
•Check the paper for proper
color development and
excessive dust.
5. Paper
cannot be
loaded.
The end of the
roll paper
cannot be
inserted into the
paper guide
section.
(1) The leading edge of paper roll
is improperly cut . A•Check that the leading edge of the paper roll is
properly cut and is not
folded.
•If the leading edge of the
paper roll is improperly cut,
cut it properly and insert
into the printer again.
(2) A piece of paper is blocking
the paper guide path. A•Verify that no piece of paper is blocking the paper
path.
•Remove the paper.
Note:
When removing the piece
of paper be sure not to
damage the printhead and
platen roller with any tools.

Phenomenon Condition Cause Level Checkpoints and
Checking Method Repair Method
6. Paper is not
fed. Roll paper is not fed, and printing
is repeated on
the same line.
(1) Roll paper feeding is
defective. A•Verify that the specified roll paper (width, thickness,
and diameter) is being
used.
•Use the specified roll paper.
•Verify that the roll paper is
loaded properly in the
paper supplying device.
•Load the roll paper
correctly.
•Tension: ≤50g-cm
(2) A foreign substance is
attached to part of the power
transmission mechanism unit,
or any of the gears in the unit
are damaged.
B•Verify that no foreign
matter attached to any part
of the power transmission
mechanism unit and that
no gears are damaged.
•If any foreign matter is
attached, remove it.
•If any of the gears are
damaged, replace them.
(3) The paper feed motor is
damaged. B•Check the resistance at each coil of the
corresponding paper feed
motor
Resistance: Approx.
Resistance:90Ω±10%
•If any abnormality is found,
replace the paper feed
motor.
(4) The paper feed motor drive
signal is defective. B•Verify that the corresponding paper feed
motor drive signal is
normal.
•If the drive signal is not
output or is not within the
specified range, adjust the
drive circuit.
7. The paper
feed pitch is
not uniform.
The line spacing
is not uniform. (1) Roll paper is not being fed correctly. A•See Cause (1) of Phenomenon 6.
•Check the platen roller for
deformation. •If deformed, replace the platen roller with a new one.
(2) The feeding load of a paper
roll exceeds the specification. A•See Cause (2) of Phenomenon 6.
•The paper roll isn’t set
properly. •Reset the paper roll properly.
•The paper roll doesn’t meet
the specification in size. •Use a paper roll which meets the specification in
size.
(3) Paper is jammed in the paper
guide. B•Paper is jammed in the paper guide. •Remove paper. At this time, use caution to
prevent damage to the
platen roller.
(4) The paper feed motor drive
signal is defective. B•See Cause (4) of Phenomenon 6.
(5) The head up lever position is
not correct. A•See Cause (1) of Phenomenon 4.
8. Paper end
detection is
not corrected.
Although paper
exists in the
paper guide
path, the out-of-
paper state
continues.
(1) The paper end detector is
defective. B•Check the signal level on the paper end detection
circuit board.
•If the signal level is
abnormal, replace the
paper guide ass’y.
When paper is
removed from
the paper guide
path, the printer
does not enter
the out-of-paper
state.
(1) A piece of paper or foreign
substance is blocking the
paper path.
B•Verify that nothing is
blocking the paper path. •If anything is blocking the paper path, remove it.
(2) The paper end detector is
defective. B•See Cause (1) of Phenomenon 8.

Phenomenon Condition Cause Level Checkpoints and
Checking Method Repair Method
9. Roll paper is
not taken up. Roll paper is fed but not taken up. (1) The paper take up shaft is worn or damaged. B•Verify that the paper take up shaft is not worn or
damaged.
•If any wear or damage is
found, replace the paper
take up shaft.
(2) SP gear, C-spring or pulley is
worn or doesn’t rotate
smoothly.
B•Check paper winding parts
for wear and damage. •If wear or damage is found, replace the part with a new
one.
(3) Some of the gear teeth are
worn or damaged. B•Verify that no teeth are worn or damaged. •If any of the gear teeth are worn or damaged, replace
the gear.
(4) The paper take up belt is worn
or stretched. B•Verify that the paper take up belt is not worn or
stretched.
•If the paper take up belt is
worn or stretched, replace
it.
10. Paper
cannot be
taken up
properly.
Because the
tension to take
up the roll paper
is weak, the
diameter of the
paper taken up
becomes larger.
(1) The paper take up shaft is
worn or damaged. B•See Cause (1) of Phenomenon 9.
(2) SP gear, C-spring or pulley is
worn or doesn’t rotate
smoothly.
B•Replace SP gear, C-spring or pulley with new one.
(3) Paper roll swerves. B •Verify that the paper take
up frame sub ass’y is not
deformed or warped.
•If any deformation or warp
is found, replace the paper
take up frame sub ass’y.
(4) Some of the gear teeth are
worn or damaged. B•See Cause (3) of Phenomenon 9.
(5) The paper take up belt is worn
or stretched. B•See Cause (4) of Phenomenon 9.

CHAPTER 6 DISASSEMBLY AND ASSEMBLY
•This chapter mainly outlines the procedure for disassembling the
printer. It is advisable to reinstall the printer in the reverse order
from disassembly, referring to "Cautions to be taken when install-
ing."
•Some easy steps have been omitted.
•Only part names are described without indicating their part codes.
For the part codes, refer to the Parts Guide.
[Cautions to be taken when working on the printer]
1) The parts which need to be greased are indicated in "Cautions to
be taken when reinstalling." Whenever such a part is replaced
with a new one, grease it before installing.
Lubrication interval (rough guide)
•Every 6 months
•Every 2 years or 2,000,000 lines of printing
•Parts code of lubricant
Lubricant type PARTS CODE PRICE RANK
G36 00BB703600001 AU
2) Use caution not to have the gear chipped or deformed when
removing or reinstalling.
3) Do not touch directly the printing head.
4) Be sure to wear an earth band to ground your body.
1REMOVE THE CUTTER45 and
H-COVER45
Fig. 1
[PARTS LIST]
No. PARTS NAME Q’ty
CUTTER45 1
H-COVER45 1
SCREW (M2×8) 3
CAUTION LABEL 1
[DISASSEMBLY METHOD]
1) Remove the CUTTER45 and H-COVER45 :
Using a Phillips screwdriver, remove the three SCREWs .
Remove the CUTTER45 and H-COVER45 .
The H-COVER45 carries the "CAUTION" label .
1
2
3
4

2REMOVE THE MANUAL CUTTER
Fig. 2
[PARTS LIST]
No. PARTS NAME Q’ty
PRINTER FRAME45 1
G-COVER45 1
SCREW (M2 ×8) 3
PT-COVER 1
[DISASSEMBLY METHOD]
1) Remove the G-COVER45
Using a screwdriver, raise the two tabs of the G-COVER45
and remove the G-COVER45 from the PRINTER FRAME45
.
Fig. 3
2) Remove the SCREWs . Remove the PT-COVER .
Insert a flat-bladed screwdriver into the slit shown in the fig-
ure below.
Apply force into the direction indicated by the arrow, to raise
the tang and pull out the PT-COVER upward.
Fig. 4
1
2
3
4
1
2
(A)
PT-COVER
Along the right side in the slit,
Insert a screwdriver (-) here.

3REMOVE THE HEAD UNIT
Fig. 5
[PARTS LIST]
No. PARTS NAME Q’ty
H-SPRING 2
HEAD UP LEVER 1
E-RING 1
SCREW (M3 ×6) 2
THERMAL HEAD 1
H/C FRAME 1
Use caution not to touch the heating element of the HEAD
and PWB.
[DISASSEMBLY METHOD]
1) Remove the H-SPRINGs on the right and left sides of the
printer frame.
<Note> Pinch the H-SPRING at point E with long-nose pliers
and remove it taking care not to deform the rib of the
HOUSING A.
Fig. 6
2) Remove the HEAD UP LEVER .
3) Remove the E-RING .
4) Remove the H/C FRAME UNIT (Part of the assembly of the
THERMAL HEAD and H/C FRAME ).
<Note> Use caution not to damage or deform the H/C FRAME
UNIT by inadvertently hitting them with the ROLLERs
and gears.
5) Remove the two SCREWs and remove the THERMAL HEAD
from the H/C FRAME .
[GREASING]
Apply grease on the two mounting areas Aof the H/C FRAME .
1
2
4
3
5
A
E
A
1
4
E
6
H-spring
Pinch here with long-nose pliers.

[Cautions to be taken when reinstalling]
1. Adjusting the HEAD position
Whenever the THERMAL HEAD is replaced with a new one,
adjust its position for the H/C FRAME .
•Procedure:
1) The screw hole for fixing the HEAD in the H/C FRAME
is made a slot as shown in the figure below. First, align
the screw hole in the HEAD with the bottom area of the
slot and temporarily secure it with the SCREW .
2) Install the H/C FRAME UNIT on the HOUSING .
3) Adjust the HEAD position and make sure that heating
element of the HEAD is most properly positioned, by
performing a printing test. Do not adjust the Head position
during printing; otherwise the HEAD might break down
due to friction.
<Procedure for adjusting HEAD position>
(1) Insert a flat-bladed screwdriver into the adjustment
hole C in the H/C FRAME . Adjust the HEAD up-
ward little by little with the screwdriver until it reaches
the desired position, and secure it with the SCREW
(tightening torque: 6.5 kgf-cm).
2. Direction of H-SPRING
Install the H-SPRINGs so that the hooks point outward.
Fig. 7
3. HEAD cable
Install the 9-pin connector to the right end of the THERMAL
HEAD and the 10-pin connector to the left end.
Use caution to make a good connection or a deformed connec-
tor when connecting the THERMAL HEAD and HEAD ca-
bles.
Fig. 8
4. Installing HEAD UP LEVER and H-SPRING ("J" side)
1)
2)
3)
Fig. 9
1
1
H/C frame unit
4
5
6
4
The number of pins on the
PWB unit:10P
The number of pins on the
PWB unit:9P
1
2
H-SPRING ("J" side)
3
1
2

4 REMOVE THE PLATEN ROLLER
Fig. 10
[PARTS LIST]
No. PARTS NAME Q’ty
E-RING 2
PF-GEAR 2
BUSHING 2
PLATEN ROLLER "J" 1
PLATEN ROLLER "R" 1
PT-HOLDER 1
E-RINGs (for bushing) 2
[DISASSEMBLY METHOD]
1) Remove the E-RING and the PF-GEAR .
2) Remove the E-RINGs (for bushing) . Remove the BUSHINGs
.
3) Remove the PLATEN ROLLER "J" , PLATEN ROLLER "R"
and the PT-HOLDER .
[Cautions to be taken when reinstalling]
1. How to tell PLATEN ROLLER "J" from PLATEN ROLLER "R"
As shown in the figure below, the PLATEN ROLLER "J" has
a black line on it.
The two PLATEN ROLLERs have different polishing directions
of the rubber roller. Pay attention to the direction when installing
them.
Fig. 11
2. LUBRICATIONS
Apply grease on the PLATEN ROLLER "J" , PLATEN
ROLLER "R" , and PT-HOLDER in the points indicated
below.
Fig. 12
4
5
1
23
6
1
2
3
( PLATEN ROLLER "J" )( PLATEN ROLLER "R" )
without black line with black line
4
4
Apply grease (G36)
on the
PLATEN HOLDER
shaft, 4 mm in width.
Apply grease (G36)
inside the bushing.
( PLATEN ROLLER "R" )
( PLATEN ROLLER "J" )
( PT-HOLDER )

5REMOVE THE GEARS
Fig. 13
[PARTS LIST]
No. PARTS NAME Q’ty
IDLE GEAR-L 2
SCREW (M3 ×5) 4
WASHER 1
TIMING BELT 1
PULLEY GEAR 1
SPOOL UNIT 1
SCREW (M2×6) 1
PULLY 1
C-SPRING 1
SP-GEAR 1
IDLE GEAR-S 1
[DISASSEMBLY METHOD]
<RIGHT SIDE>
1) Remove the IDLE GEAR-L .
2) Remove the SCREW and WASHER .
3) Remove the TIMING BELT .
4) Remove the PULLEY GEAR .
5) Remove the SCREW .
<LEFT SIDE>
1) Remove the IDLE GEAR-L .
<SPOOL UNIT>
1) Remove the E-RING .
2) Remove the PULLEY , C-SPRING , SP-GEAR and
IDLE GEAR-S .
[Cautions to be taken when reinstalling]
1. Please note the position of the WASHER when securing the
WASHER to with the SCREW .
Fig. 14
2. LUBRICATIONS
Apply grease (G-36) on the IDLE GEAR-L , PULLEY GEAR
, SP-GEAR , and PRINTER FRAME (45) in the areas
indicated below.
Fig. 15
54
12
3
8
11 10
9
WASHER
SCREW
WASHER
SCREW
PULLEY
GEAR
The PRINTER
FRAME 45's shaft
( PRINTER FRAME45 )( SP GEAR )
( IDLE GEAR-L ) ( PULLY GEAR )
Apply grease on
the shafts.
Apply grease
sufficiently.
Apply grease on the gear teeth
contact and inside the shaft hole. Apply grease inside the gear shaft hole.
Apply grease on the gear shaft
and inside the shaft hole.

6REMOVE THE HARDWARE PARTS
Fig. 16
[PARTS LIST]
No. PARTS NAME Q’ty
MICRO S/W UNIT 1
PWB UNIT 1
SCREW (M2 ×12) 1
MOTOR 2
SCREW (M3 ×6) 4
SCREW (M3 ×5) 1
[DISASSEMBLY METHOD]
<MICRO SWITCH>
1) Remove the connector cable of the MICRO S/W UNIT from
the connector CON5 (2 pins) of the PWB UNIT .
2) Remove the SCREW and the MICRO S/W UNIT .
<JOURNAL SIDE MOTOR>
1) Remove the connector cable of the MOTOR from the con-
nector CON5 (6 pins) of the PWB UNIT .
2) Remove the two SCREWs and the MOTOR .
<RECEIPT SIDE MOTOR>
1) Remove the connector cable of the MOTOR from the con-
nector CON7 (6 pins) of the PWB UNIT .
2) Remove the two SCREWs and the MOTOR .
<PWB UNIT>
1) Remove the SCREW and the PWB UNIT .
[Cautions to be taken when reinstalling]
1. Wire the MICRO SWITCH UNIT cable as shown below.
Secure the MICRO S/W UNIT with the SCREW (tighten-
ing torque: 4.0 kgf-cm).
Fig. 17
2. Wire each cable as shown below.
Fig. 18
4
5
2
1
35
46
5
Wire the MICRO SWITCH
cable as shown in the figure.
3
CN6
Receipt motor cable
Journal motor
cable
Micro switch cable
Twist the
cable.
CN7
CN3
CN2 CN5
Push the cables into the grooves.
Twist the
cable.
Earth cable

7REMOVE OTHER PARTS
Fig. 19
[PARTS LIST]
No. PARTS NAME Q’ty
FEED ROLLER 2
SP-GUIDE 1
SCREW (M3×5) 1
STOPPER 1
[DISASSEMBLY METHOD]
1) Remove the two FEED ROLLERs from the PRINTER
FRAME (45).
2) Remove the SCREW (M3×5) and remove the SP-GUIDE .
3) Remove the STOPPER from the PRINTER FRAME (45).
2. LUBRICATION
Apply grease (G-36) on the mounting areas of the FEED ROLLER.
Fig. 20
2
3
4
1
Apply grease