Sharp XE-A301 Service Manual ▷ View online
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.
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 (2
4d
ots)
3.
75 (30
d
o
ts)
3.
75 (30
d
o
ts)
UNIT: mm
CHAPTER 2. OUTLINE OF DRIVING
CIRCUIT
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
1
VHIN
2
NC
3
NC
4
NC
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)
(+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
1
VH
2
VH
3
Dout
4
CLK
5
/LAT
6
/STB3
7
/STB1
8
GND
9
GND
CON3: <For Thermal head connector B>
Pin
No.
Signal
Pin
No.
Signal
Pin
No.
Signal
1
GND
2
GND
3
NC
4
TM
5
VDD (+5V)
6
/STB4
7
/STB3
8
Din
9
VH
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
1
VJCOM
2
VJCOM
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
4
VDD
+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.
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
1
2
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.
in the IC.
