Casio PCR250

ELECTRONIC CASH REGISTER
(with price)
SERVICE MANUAL
110CR/PCR250 (EX-266)
150CR (EX-267)
JAN. 1995
Printer Model : M42V
INDEX

Casio PCR250 Specifications

General

Type	Electronic Cash Register
Display	LCD
Number of PLUs	2000
Paper width	58 mm
Power Supply	AC 120V, 60 Hz
Printer	Yes
Printing Method	Thermal
Cash Drawer	Yes

Summary

CIRCUIT EXPLANATION

6-1. Power supply circuit

Explains the power supply circuit, including voltage rectification and DC-DC conversion.

6-3. Data communication between CPU and EEPROM

Explains the serial communication protocol between the CPU and EEPROM for data transfer.

6-5. Pin description (CPU uPD78042 AGF)

Details the function and signals for each pin of the CPU.

DISASSEMBLY

7-1. To open the upper case

Provides steps to open the upper case of the electronic cash register.

7-2. To remove the Main PCB

Details how to remove the Main PCB by disconnecting cables and unscrewing it.

7-3. To remove the keyboard assy

Explains how to remove the keyboard assembly by releasing hooks.

DIAGNOSTIC OPERATIONS

8-1. To start the diagnostic operation

Outlines the steps to begin the diagnostic operation, including mode switch and input sequence.

8-3. Operations

Details various diagnostic operations including key code and switch checks.

Individual test

Read only test for EEPROM

Country code write operation for EEPROM (ADD data)

Details how to write country codes to EEPROM and notes for acceptance and errors.

IC DATA

9-1. LB1268

9-2. S-80728 AN-Z

CIRCUIT DIAGRAM

PCB PAYOUT

PARTS LIST

1. MAIN PCB BLOCK

2. 2 ND DISPLAY BLOCK (150 CR ONLY)

3. POWER SUPPLY BLOCK

4. KEYBOARD BLOCK

5. UPPER CASE BLOCK

7. PRINTER UNIT

8. DRAWER UNIT

DL-1817 Drawer Unit

DL-2749 Drawer Unit

DL-2349 Drawer Unit