Casio DL-220LA-GY, DL-250LA-GYB, DR-120LA-WE Service Manual

4 (1)
Casio DL-220LA-GY, DL-250LA-GYB, DR-120LA-WE Service Manual

(without price)

DL-220LA(GY) (LX-226IY)

DL-250LA(GYB) (LX-226JY)

DR-120LA(WE) (LX-226AY)

SEP. 1995

DL-220LA

DR-120LA

INDEX

R

CONTENTS

1.

SPECIFICATIONS .........................................................................................................

1

2.

BLOCK DIAGRAM ........................................................................................................

2

3.

CPU (MN158418YCY) PIN FUNCTION .........................................................................

3

4.

TROUBLESHOOTING ...................................................................................................

4

5.

DIAGNOSTIC.................................................................................................................

5

6.

SCHEMATIC DIAGRAM................................................................................................

6

7.

DISASSEMBLY VIEW ...................................................................................................

8

8.

PARTS LIST ..................................................................................................................

9

1. SPECIFICATIONS

Functions:

4 basic arithmetic operations (+, -, ×, ÷), constants for ×/÷, sub-total/total/

 

grand total, item counting, ADD mode calculations, repeat calculations,

 

memory calculations, percentage calculations and various kinds of practical

 

calculations.

Decimal point:

Full floating, and fixed (0, 1, 2, 3, 4 or 6) with round-off, round-up or cut-off.

Capacity:

12digits

Display:

Digitron tube panel

Ambient temperature range:

0°C — 40°C (32°F — 104°F)

Power supply:

AC 100/120/220 or 240 V (±10V), 50/60 Hz ••••• Fixed

 

*Rated current and voltage are printed on the calculator.

Dimensions:

83mmH × 214mmW × 376mmD

 

(3 1/4"H × 8 3/8"W × 14 3/4"D) including rollholder.

Weight:

1.7kg (3.8 lbs)

— 1 —

2.BLOCK DIAGRAM

 

 

Display tube

 

VF1,VF2

 

 

 

13-MT-31GB

 

 

 

 

Segment signal

 

Digital signal

 

 

S1~S7,SAP,SDP

D1~D13

 

 

SO1~SO7

 

 

 

 

Slide switch

 

 

 

 

 

 

SI1~SI3,SI5

 

 

 

 

 

 

 

 

Ribbon shift signal

 

 

 

CPU

 

Character selective signal

Printer

 

 

 

Timing pulse

 

 

MN158418YCY

M-80

 

 

 

 

KO1~KO8

VDD

 

 

 

Keyboard

 

Motor control signal

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

KI1~KI6

VSS

 

 

 

 

 

 

 

 

 

 

Power supply

 

Motor power supply

 

 

 

 

Detector power supply

 

 

 

circuit

 

 

 

— 2 —

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