Sharp ER-A450T Service Manual
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Sharp ER-A450T Service Manual

Sharp ER-A450T Service Manual

Service manual
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See also: Programming Manual , Instruction Manual
CAUTION
EXTREME CAUTION MUST BE TAKEN WHEN SERVICING THIS MACHINE. WHEN THE
MODE SWITCH IS IN THE OFF POSITION, VOLTAGE IS STILL SUPPLIED TO THE ENTIRE
MACHINE.
WHEN WORKING ON THIS MACHINE MAKE SURE THAT THE POWER CORD IS
REMOVED FROM THE WALL OUTLET.
CHAPTER 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
CHAPTER 2. OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
CHAPTER 3. SERVICE RESET AND MASTER RESET . . . . . . . . . . . . . . . . 3-1
CHAPTER 4. HARDWARE DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
CHAPTER 5. TEST FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
CHAPTER 6. DOWN LOAD FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
CHAPTER 7. SERVICE PRECAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
CHAPTER 8. CIRCUIT DIAGRAM & PWB LAYOUT . . . . . . . . . . . . . . . . . . . 8-1
PARTS GUIDE
Parts marked with "
" are important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
SERVICE MANUAL
ELECTRONIC
CASH REGISTER
MODEL
CONTENTS
SHARP CORPORATION
ER-A450T
SRV Key : LKGIM7113RCZZ
PRINTER : PR-45M
("U" and "A" version)
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

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  • Page 1: Table Of Contents

    SERVICE MANUAL ELECTRONIC CASH REGISTER ER-A450T MODEL SRV Key : LKGIM7113RCZZ PRINTER : PR-45M ("U" and "A" version) CAUTION EXTREME CAUTION MUST BE TAKEN WHEN SERVICING THIS MACHINE. WHEN THE MODE SWITCH IS IN THE OFF POSITION, VOLTAGE IS STILL SUPPLIED TO THE ENTIRE MACHINE.

  • Page 2: Chapter 1. Specifications

    CHAPTER 1. SPECIFICATIONS 1. Appearance/Rating 1) Rating Power source 120V 10% AC , 60Hz Power consumption Standby: 14 W Operating: 37 W (max.) Operating temperature 32 - 104 °F (0°C - 40°C) Operating humidity 10% - 90% (RH) Physical dimensions, 16.5(W) x 16.8(D) x 11.5(H) in.

  • Page 3: Specifications

    Display contents 3. Mode switch <Segment> Position Description Amount Minus sign 4-10 - : Floating Error PGM Mode OP,X/Z VOID Mode X1/Z1 RFND SALE 1-10 rrrrrrrrrr : PGM1 X2/Z2 Mode Light up only at the starting of RFND PGM2 SALE (SRV) CASH, f : Light up when a registration is finalized...
  • Page 4 Cutter: Manual 2) Paper Paper near end sensor: Item Description Printing area: Name Heat-quality paper Number of thermal head heater elements 864 dots Roll dimension 44.5 0.5 mm in width (688dots) Thickness 0.06 mm to 0.08 mm 3) Cutter (288dots) (288dots) (112dots) Method: Manual...
  • Page 5 7. RS232 Interface 2) Port 1 (CH8) on the RS connector PWB Channel No.: Channel No.: Port 1(CH8) Port 2(CH1) 1) Port 2 (CH1) on the Main PWB Pin No.9 : /CI signal (Default) Pin No.9 : +5V signal The No.9 pin signal of the Port 1 (CH8) can be selected between the /CI signal and the +5V signal by changing the connection of the SW2 (initial value: /CI signal) NOTE:...

  • Page 6: Chapter 2. Options

    CHAPTER 2. OPTIONS 1. System configuration ER-A6HS1 or LOCAL PURCHASE (NOTE1) This symbol sho ws NEW MODEL BARCODE READER ER-A450T ER-03RA LOCAL PURCHASE LOCAL PURCHASE RS-232 2port MASTER MA CHINE COMPUTER CABLE OPTION RAM PC UTILITY ER-02FD EXE ER-04D W...
  • Page 7 2. Options (SHARP only) NAME MODEL DESCRIPTION EXPANSION RAM CHIP ER-03RA 512K bytes RAM CHIP REMOTE DRAWER ER-04DW PRESETS LOADER ER-01FD/02FD FD unit KEY TOP KIT ER-11KT7 1 KEY TOP UNIT ER-12KT7 2 KEY TOP UNIT ER-22KT7 2 KEY TOP UNIT...

  • Page 8: Chapter 3. Service Reset And Master Reset

    CHAPTER 3. SERVICE RESET AND MASTER RESET 1. SERVICE reset (Program Loop Reset) Used to return the machine back to its operational state after a lock- [key setup procedure] up has occurred. Procedure Method 1 MRS-2 Key position set Free key Free key setup executed complete.

  • Page 9: Chapter 4. Hardware Description

    CHAPTER 4. HARDWARE DESCRIPTION 1. Hard ware block diagram STANDARD OPTIONAL RAM1 RAM2 ER-03RA:512KB DRAWER 256KB 512KB STANDARD GATE ARRAY TPRC1 MPCA7 OPERATER DISPLAY 512KB 1 LINE 7SEG 10DIG CUSTOMER DISPLAY 1 LINE 7SEG 7DIG PRINTER PR-45M CKDC8 SWITCH KEY BOARD RS232 OPC2 1 ports...
  • Page 10 2. Description of main LSI’s 2-1. CPU (HD6415108-10) 1) Pin configuration AVSS P57/STOP HD6415108-10 pin configuration Fig. 2-1 4 – 2...
  • Page 11 2) Block diagram P27/A23 P26/A22 Data bus Port 1 P25/A21 P24/A20 P23/A19 P22/A18 P21/A17 P20/A16 EXTAL XTAL Clock Watch oscillator dog timer H8/500 CPU STBY Interruption controller 16bit free running Refresh controller timer x 2ch RFSH BREQ BACK Wait state 8bit timer controller WAIT...
  • Page 12 3) Pin description SIGNAL SIGNAL SYMBOL FUNCTION SYMBOL FUNCTION NAME NAME /RES /RESET RESET INPUT from CKDC WUTH /PRST Printer (PR-45) Reset signal from BUFFER MPCA NON-MASKABLE INTERRUPT /NEJ Near END signal journal INPUT FOR SSP INTERRUPT INPUT (NU) GND /NER Near END signal receipt EVENT READ CANCEL (to CKDC)
  • Page 13 2-2. G.A (MPCA7) 1) Pin configuration EXINT0 EXINT1 PCUT EXINT2 FCUT EXINT3 STAMP RA15 SLRS RA16 SLMTD RA17 RA18 EXWAIT POFF WAIT INT1 HTS1 MCR1 SCK1 DAX1 STH1 RCKX IRRX UATX VRESC UARX SLTMG UASCK IRTX SLRST PHAI SDT7 SDT6 MA15 SDT5 TEST...
  • Page 14 2) Block diagram A23~A0 IRLON ROS1 ROS2 Address decode RASEL RAS1 SSPRQ SSP comparison register External CS Image BAR. RAS2 Internal CS control RAS3 OPTCS IRTX IRRX I/R Control D0~D7 ASKRX Buffer TXDI SCKI RXDI HTS1 Multiplexer SCK1 serial select STH1 HTS2 SCK2...
  • Page 15 3) Pin description Signal Signal Function Function name name Receipt side paper feed solenoid (NU) 8 bit serial port output to CPU RXD2 Journal side paper feed solenoid (NU) 8 bit serial port input from CPU TXD2 Printer partial cut signal (NU) Serial port shift clock input from CPU.
  • Page 16 2-3. CKDC8 Signal Function name 1) Pin configulation 107 MCR2 — 108 WAIT Wait request signal External wait control input signal (NU) 109 EXWAIT 110 RA18 111 RA17 112 GND — /RESETS 113 RA16 /SHEN 114 RA15 LDRQ 115 RDO Expansion RD signal Option 116 WRO...
  • Page 17 2-4. TPRC1 (F258024PC) SIGNAL SYMBOL FUNCTION NAME 1) General KEY RETURN 6 TPRC1 is the LSI circuit of the peripheral circuits of the microcom- KEY RETURN 7 puter required for thermal printer control. AVRF AVDD Auto cutter Pulse motor /RESET /RES0 32.768 KHz POF,RES...
  • Page 18 2) Pin configuration PTJM PTRM BA13 BA14 BA15 LATCH CLOCK INHDEC CSEN TEST2 TEST1 CTAO CTBO VHCOM JVPON RVPON PCRES PHUP EBACK INTI EBREQ Fig. 2-7 4 – 10...
  • Page 19 3) Block diagram INHBEC CSEN DECODEK UNIT RD,WR SYSTEM POF,INH A0~23 PDCTLU D0~7 HEAD CONTROL TIMER UNIT POP,PHUP,PFP,PCRES PORT PTRM,PTJM MOTOR CONTROL CLOCK,SO,ST1~5,HCO TIMER UNIT HEAD EBAK,EPEQ MISC. EBRK,EACK CUTTER CONTROL TIMER UNIT RVPON,JVPON, MOTOR RAS,RBS,RCS,RDS, CONTROL JAS,JBD,JCS,JDS INTI TEST TEST1,TEST2 CIRCUIT CLOCK...
  • Page 20 Signal Signal In/Out Function In/Out Function name name Data bus 6: Internal register, print buffer Journal paper empty data IO PHUP Printer head up Data bus 7: Internal register, print buffer PCRES Auto cutter unit reset signal input (Nu) data IO Auto cutter unit FP signal input (Nu) Address bus 0 RVPON...
  • Page 21 Signal Signal In/Out Function In/Out Function name name 144 BD7 Data bus 7 for PB-RAM 130 GND — 145 BD6 Data bus 6 for PB-RAM 131 GND — 146 BD5 Data bus 5 for PB-RAM 132 GND — 147 GND —...
  • Page 22 2) Block diagram OPC2 OPC1 DATA BUS OPC1~USART BAUD RATE GENERATOR BAUD RATE GENERATOR USART USART USART USART USART Common input 3) Pin description Name ER-A770 Description Name ER-A770 Description SL00 RS-232/UNIT0 BRK1 BRK2 channel select SL01 TRNEMP1 TRENMP2 SL02 RCVRDY1 RCVRDY2 SL10...
  • Page 23 Name ER-A770 Description Name ER-A770 Description Data bus (CPU) Write signal /WRH (to USART) Data bus (CPU) Data bus (CPU) Reset signal Data bus (CPU) RES USART (to USART) Data bus (CPU) TRNCLK Data bus (CPU) RCVCLK RS-232/INLINE DBTST /SRCS USART chip select O OSI14 NC UTST...
  • Page 24 2) CKDC8 oscillation circuit Name ER-A770 Description 4.19MHz /CSD TRNDTD /DTRD /RTSD RCVDTD CKDC 8 /CTSD R164 330K /DSRD TRNRDYD RCVRDYD 32.768KHz TRNEMPD SYCBKD C106 C105 /WIN /WRH Write signal HD404728A91FS /RIN /RDH Read signal RSLCT0 Address bus RSLCT1 Address bus RES USART Reset signal Fig.
  • Page 25 The voltage at the (–) pin of the comparator IC7A is always main- 0 page memory map tained to 5.1V by means of the zener diode ZD2, while +24V supply 000000H voltage is divided through the resistors R114, R115 and R116, and is applied to the (+) pin.
  • Page 26 RAM area memory map 2) Block diagram 100000H Data bus ROS1 ROM1 NOT USE MPCA6 1C0000H RAS1 128K Byte RAM2 1E0000H Address bus RAM1 (OPTION) RAS2 128K Byte RAS2 RAS3 200000H RAS3 512K Byte Fig. 5-6 (OPTION) ROM control 280000H C80000H~CFFFFFH ROS2 (MAX 2MB)
  • Page 27 As the address detection system, the break address register compari- 6. SSP circuit son system is employed though the mapping system and employed in the conventional monitor RAM. The address register located in MPCA 1) Block diagram is always compared with the system address bus to monitor and generate the NMI signal at a synchronized timing and to go to the This is the circuit employed for implementing the Special Service NMI exception process.
  • Page 28 3) SSP register access method Access to SSP break address register is performed through the tem- porary register as shown below: A19 A18 A17 A16 A15 A8 A7 Temporary Temporary Fig. 6-5 Enable flags can be accessed individually. Information on which break register the SSP break is detected and is Though enable register can be accessed individually, writing to read as binary data by reading address FFFFFFH (*1).
  • Page 29 Receipt feed motor: The motor rotates counterclockwise. 9. Key, display, time buzzer controls Phase Step No. MPCA7 HTS1 STH1 SCK1 RESET RESET RES1 INT2 Journal feed motor: The motor rotates clockwise. POFF Phase Step No. LDRQ LDRQ SHEN SHEN P-OFF POFF Note 1: ON = Conducting OFF = Not conducting...

  • Page 30: Power Supply Circuit

    2) Power off sequence 4) DISPLAY CONTROL When the CPU senses a service interruption, it performs the neces- sary procedures for the CPU to stop. Then the CPU outputs a reset LED-display request to the CKDC8. (for operator) G1-G10 Reset request SA-SG,DP LED-display (for customer)

  • Page 31: Chapter 5. Test Function

    CHAPTER 5. TEST FUNCTION 1. General 4. Test contents 1) This diagnostic program has been developed for diagnosing ma- [1] Display & Buzzer test chine functions in the field. The program is contained within the ER-A450S. 1) Key operation The diagnostic program is stored in the external ROM which will be executed by the CPU (H8/510) which requires the following CA/AT diagnostic operations:...
  • Page 32 04 13 03 12 02 11 01 00 26 25 06 1. Check that the slanted lines of special characters are clearly <ER-A450T STANDARD KEY BOARD LAYOUT> printed. 2. Check that the characters are printed at a uniform density. 68 67 58 77 78 3.
  • Page 33 [STANDARD KEYBOARD LAYOUT] 3) Check items a) Check of the display in the test and the content of end print. SUMCHECK DATA = A4 + 0E + 04 + 2B + 17 + = 2254 4) Test termination 44 43 3A 4D 4E The test terminates and the test No.
  • Page 34 [7] Calendar oscillator test [9] Drawer open sensor test (For standard test) 1) Key operation 1) Key operation CA/AT CA/AT 2) Functional description 2) Functional description State of the drawer open sensor is sensed and displayed. This program is used to test the calendar oscillator function. Display: 1 1 0 3) Check items...
  • Page 35 2) Functional description 4) Test termination Perform the following check for the standard RAM 256 KByte SRAM. The test automatically terminates with the following termination mes- The memory contents should not be changed before and after the sage. check. Normal termination print Perform the following processes for memory address to be checked ROM1 27040...
  • Page 36 2) Content [16] RS-232 channel 8 check The following process is performed for memory addresses to be Loop back connector for D-SUB 9pin : UKOG-6705RCZZ checked. PASS1: memory data save PASS2: Data "0000H" write PIN No. PASS3: Data "0000H" read and comparison, data "5555H" write SIGNAL NAME PASS4: Data "5555H"...
  • Page 37 Note that when check terminates, the termination print- out occurs irrespective of any errors that have occurred during the check. (The program terminates normally only when no error print-out has occurred.) ERROR ERROR PRINT Contents E1-ER DR ERn-DRn ERR E2-ER CI ERn-CIn ERR E3-RS CD RSn-CDn ERR...

  • Page 38: Chapter 6. Down Load Function

    CHAPTER 6. DOWN LOAD FUNCTION 1. General 3. Location of connector pins RAM data can be transmitted in the following two methods. ECR-ECR cable Save the data before servicing as follows: 9PIN D-SUB 9PIN D-SUB Cable: 9 pin D-SUB – 9 pin D-SUB Fig.
  • Page 39 ECR-ER-02FD cable 5. Data format 25PIN D-SUB 9PIN D-SUB A single byte image of the RAM data to be transmitted is divided into a high order 4 bits and low order 4 bits and converted into ASCII ER-02FD code. Then, the image of the memory is sent in the following format: Data (128bytes) Memory top address: 0000H FFFFH...
  • Page 40 7. Operational method 8. Saving/Loading of data to/From the FD unit Configuration 1) To prepare an ECR to receive data from another ECR or the ER-02FD, the memory size of the receiving unit must be the same 1) Turn off the power switch of the ER-02FD, and set the DIP as or greater than the sending unit.
  • Page 41 This Specification document describes the "02FD.EXE" PC utility. PC and ER-A450T are connected by RS232. The "02FD.EXE" works with the Windows95/98 operating systems Connect the PORT2(CH1) of the ER-A450T to the RS-232 interface and has the following functions by connecting ER-A450T via RS232. of the PC.
  • Page 42 UpLoad is completed. The initial Window is shown. "Push "Exit" Button." ALL RAM Data Download ( PC -> ER-A450T ) Place the SRV key in the SRV mode. Execute "02FD.EXE" on P.C *Don’ t execute the other Software at the same time.

  • Page 43: Chapter 7. Service Precaution

    3. Caution to be taken when removing the TOP CABINET After removing the ER-A450T’s TOP CABINET, put the TOP CABINET on the positions given below to prevent the cable that connects the MAIN PWB and POWER SUPPLY PWB from disconnecting.
  • Page 45 Symbol/PartsCod) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 59 4. FRONT DISPLAY PWB LAYOUT 5. POP-UP DISPLAY PWB LAYOUT...
  • Page 61 7. PS PWB LAYOUT...
  • Page 62 ER-A450TU/A PARTS GUIDE ER-A450T MODEL PRINTER:PR-45M SRV KEY:LKGIM7113BHZZ (for U.S.A,Canada) CONTENTS Exteriors Keyboard unit Packing material & Accessories Drawer box unit (SK423 type) Main PWB unit(include Block6) RS232C PWB unit PS PWB unit Front LED PWB unit Pop up LED PWB unit...

  • Page 63: Exteriors

    ER-A450TU/A 1 Exteriors PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 P F I L W 6 9 7 6 B H S A Front filter 2 G C A B B 7 8 6 1 B H Z Z Pop up cabinet 5 C P W B F 7 5 0 4 B H 0 1 Pop up LED PWB unit(NORMAL)
  • Page 64 ER-A450TU/A 1 Exteriors RCP00363 – 2 –...

  • Page 65: Keyboard Unit

    ER-A450TU/A 2 Keyboard unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 L A N G Q 7 6 0 4 B H Z Z Mode sw angle 2 L K G I W 0 0 0 1 B H Z A Mode sw(body) 3 Q C N W - 7 8 8 1 B H Z Z Mode sw cable...
  • Page 66 ER-A450TU/A 2 Keyboard unit RCP00364 3 Packing material & Accessories RCP00365 – 4 –...

  • Page 67: Drawer Box Unit (Sk423 Type)

    ER-A450TU/A 4 Drawer box unit (SK423 type) PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK C C A B M 7 8 6 2 B H Z A Cabinet frame unit [U.S.A] C C A B M 7 8 6 4 B H Z A Cabinet frame unit [Canada] 3 P G U M M 6 6 9 5 B H Z Z...
  • Page 68 ER-A450TU/A 4 Drawer box unit (SK423 type) 9 10 for CANADA for U.S.A. RCP00366 – 6 –...

  • Page 69: Main Pwb Unit(Include Block6)

    ER-A450TU/A 5 Main PWB unit(include Block6) PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 P R D A F 6 6 5 6 B H Z Z Heat sink [Q23] 2 Q C N C M 1 1 0 1 B H Z Z Connector (5273-2)(2P) [CN8] 3 Q C N C M 7 0 5 7 B H Z Z...
  • Page 70 ER-A450TU/A 5 Main PWB unit(include Block6) PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 57 V H I D 7 8 0 0 2 1 5 0 5 IC (CKDC8)(D780021505) [IC2] 58 V H I F 2 5 8 0 2 4 P C / IC (F258024PC) [IC17] 59 V H I G 7 6 C 2 5 6 F 7 0...

  • Page 71: Rs232C Pwb Unit

    ER-A450TU/A 6 RS232C PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 Q C N C M 1 0 6 0 A C 0 3 Connector (Short Pin 3P) [SW2,SW3] 2 Q C N C M 7 1 2 5 B H 0 I Connector ((9P) MLX 87023-6066)) [RS CN1,RSCN2] 3 Q C N C M 7 1 7 6 B H 0 I...
  • Page 72 ER-A450TU/A 11 Service route options PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 L K G I M 7 1 1 3 B H Z Z Service key 2 L K G I M 7 1 2 6 B H Z Z Mode key grip cover (OP key only) 3 G C O V H 7 1 2 6 B H Z Z Drip-proof keyboard cover (include the switch cover)
  • Page 73 ER-A450TU/A Index PRICE PART PARTS CODE RANK MARK RANK LKGIM7110BHZZ PRICE PART PARTS CODE " RANK MARK RANK 3- 12 LKGIM7111BHZZ CCABM7862BHZA " 3- 12 CCABM7864BHZA LKGIM7113BHZZ CCAS-6678BH01 LKGIM7126BHZZ 4-505 CCAS-6682BH01 LKGIM7129BHZZ 4-501 CFRM-6682BH02 " 4-504 3- 12 CFRM-6683BH01 LKGIM7331BHZZ 4- 16 3- 11 CLABH2264BHZZ...
  • Page 74 ER-A450TU/A PRICE PART PRICE PART PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK QCNW-7877BHZZ VCKYTV1HF104Z 5- 47 QCNW-7878BHZZ VCQYNA1HM333K 7- 13 " VHD1SR1544001 5- 48 QCNW-7880BHZZ VHD1SS353//-1 1- 19 5- 49 QCNW-7881BHZZ VHDCP301///-1 7- 14 QCNW-7883BHZZ VHDPS156///-1 11-109 7- 15 QCNW-7886BHZZ VHDSFPL52V/-1...
  • Page 75 ER-A450TU/A PRICE PART PRICE PART PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK XBPSD30P06K00 1- 44 XEBSD30P08000 1- 18 " XEBSD30P10000 1- 41 XEBSD30P14000 1- 75 XHBSD30P04000 1- 34 " XHBSD30P12000 4- 26 XHBSD40P06000 1- 28 XHBSD40P15000 4- 39 XHPSC30P08000 4- 41 XHPSD30P08000...
  • Page 76 COPYRIGHT 2000 BY SHARP CORPORATION All rights reserved. Printed in Japan. No part of this publication may be reproduced, stored 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.

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