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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.

Содержание PR-45M

Страница 1: ...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 ...

Страница 2: ...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 ...

Страница 3: ...b 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 ...

Страница 4: ...A 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 ...

Страница 5: ...e 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 1 ON OFF OFF ON 2 ON OFF ON OFF 3 OFF ON ON OFF 4 OFF ON OFF ON RECEIPT MOTOR STEP No PHASE A PHASE B PHASE C PHASE D 1 ON OFF ON OFF 2 ON OFF OFF ON 3 OFF ON OFF ON 4 OFF ON ON OFF 5 End sen...

Страница 6: ...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 transporte...

Страница 7: ...nts 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 ...

Страница 8: ... 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 locati...

Страница 9: ...ve 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...

Страница 10: ...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...

Страница 11: ...ed 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 mee...

Страница 12: ...he 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 ...

Страница 13: ...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...

Страница 14: ... 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 ...

Страница 15: ...g 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 FRA...

Страница 16: ...EAD 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 HE...

Страница 17: ...LATEN 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 2 3 6 1 2 3 PLATEN ROLLER J P...

Страница 18: ...ING 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 5 4 1 2 3 8 11 10 9 WASHER SCREW WASHER SCREW PULLEY GEAR The PRINTER FRAME 45 s shaft PRINTER FRAME45 SP GEAR ID...

Страница 19: ...EWs 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 sh...

Страница 20: ...W 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 ...

Страница 21: ...ING SPOOL Fig 21 PARTS LIST No PARTS NAME Q ty SPOOL 1 G WHEEL 1 Apply grease G 36 in the points indicated in the figure 1 Left end of the SPOOL 2 SP ANGLE in the area to which the right end of the SPOOL is fitted 1 2 grease grease ...

Страница 22: ...CHAPTER 7 PWB LAYOUT 1 6 CON6 1 6 CON4 CON2 4 1 3 2 PD1 R1 R2 R3 R4 4 1 3 2 PD2 1 2 CON5 1 40 CON1 1 6 CON7 1 9 CON3 1 9 R5 C21 C1 C3 ...

Страница 23: ...1 Exteriors RCPS0216 1 2 6 7 8 9 10 11 12 13 14 15 16 17 28 19 20 43 39 38 24 32 33 31 37 25 34 10 24 18 40 6 10 22 21 15 6 23 26 27 4 29 26 42 6 36 36 6 18 21 22 20 15 6 30 40 3 5 4 41 35 PR 45M 1 ...

Страница 24: ...witch wire 30 X J B S D 2 0 P 1 2 0 0 0 AA C Screw 2 12 31 G C O V H 7 1 4 6 B H Z Z AH N D G cover 45 32 P G U M M 2 3 7 7 R C Z Z AN N C Platen roller J 33 L H L D R 6 8 3 2 B H Z Z AF C PT holder 34 P G U M M 2 3 7 6 R C Z Z AN N C Platen roller R 35 G C O V H 2 4 6 8 B H Z Z AK N D H cover 45 36 L X B Z 6 7 8 5 B H Z Z AB C Screw M2 6 37 P C U T 2 3 2 4 B H Z Z AG N C Cutter 45 38 P G I D M 2 ...

Страница 25: ...ored in a retrieval system or transmitted In any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher SHARP CORPORATION Information Systems Group Quality Reliability Control Center Yamatokoriyama Nara 639 1103 Japan 2000 December Printed in Japan ...

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