Casio DR-120LB User manual

DR-120LB(ZX-517C)

DL-200L(ZX-517A)

DL-210L(ZX-517B)

DR-320B(ZX-517D)

JULY 1996

(without price)

DR-120LB DR-320B

CONTENTS

1. SPECIFICATIONS......................................................................................................... 1

2. BLOCK DIAGRAM ........................................................................................................ 1

3. CPU (MN15418YCY) PIN FUNCTION ...........................................................................2

4. DIAGNOSTIC ................................................................................................................ 3

5. TROUBLESHOOTING .................................................................................................. 4

6. DISASSEMBLY VIEW................................................................................................... 5

7. SCHEMATIC DIAGRAMS ............................................................................................. 6

8. PARTS LIST ................................................................................................................ 10

— 1 —

1. SPECIFICATIONS

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

total/grand total, item counting, ADD mode calculations, repeat calcu-

lations, memory calculation, 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 cut-

off.

Capacity: 12 digits

Ambient temperature range: 0 °C ~ 40 °C (32 °F ~ 104 °F)

Power supply: (AC 120 V, 100/120 V, 230/240 V)

Rated current and voltage are printed on the calculator.

Dimensions: 75.1 (H) ×212 (W) ×358 (D) mm

(3" H ×8 3/8" W ×14 1/8" D) including roll-holder

Weight: 1.5 kg (3.3 lbs)

Consumable supplies: Printer ribbon (RB-02 or GB-02)

Roll papaer (Width 58 × 60 ø mm)

The AC outlet must be located near the unit and must be easily accessible.

2. BLOCK DIAGRAM

Display tube

13-BT-144G

CPU

MN158418YCY

Power supply

circuit

Slide switch

Keyboard

Printer

M-80

VF1 (5.9 V, 100 mA), VF2 (2.0 V, 100 mA)

Ribbon shift signal

Character selective signal

Timing pulse

Digital signal

D1~D13

Motor control signal

VDD (32 V, 30 mA)

VSS (27 V, 30 mA)

Sent signal

S1~S7, SAP, SDP

SO1~SO7

SI1~SI3, SI5

KO1 ~ KO8

KI1 ~ KI6 VM (11 V, 200 mA)

VDD

— 2 —

3. CPU (MN158418YCY) PIN FUNCTION

Pin No. Signal I/O Function

1 ~ 7, 64 P00 ~ P13 Out Common signal for keyboard

8 ~ 12 P20 ~ P22, P32, P33 In Key signal from keyboard

13 IRQ In Timing pulse signal from printer

14 DEBIN In Reset pulse (Not used)

15 IRQCNT In Auxiliary timing (VDD)

16 P40 Out Motor control signal

17 P41 Out Ribbon shift signal for printer

18 ~ 30 P42, P43, P50 ~ P53, Out Character selective signal for printer

P70 ~ P73, P80 ~ P82

31, 32 P83, P90 Out Segment signal for display,

Character selective signal for printer

33 ~ 39 P91 ~ P93 Out Common signal for slide switch,

PA0 ~ PA3 Segment signal for display

40 P60 In Input port (VDD)

41 ~ 43 P61 ~ P63 In Signal from slide switch

44 ~ 56 PB0 ~ PB3, Out Digit signal for display

PC0 ~ PC3,

PD0 ~ PD3,

PE0

57 VPP In GND terminal

58 VDD In VDD terminal (+32 V)

59, 60 OSC1, OSC2 I/O Clock signal for CPU

61 VSS In VSS terminal (+27 V)

62 SYNC — Not used

63 RST In Signal from slide switch, Reset signal

— 3 —

STEP

Paper feeding

NOTE

The character with "[ ]"

will be printed by red

ink.

Press the button 3

seconds continuously.

MODE SWITCHES

ON F 6

PRINT F 6

PRINT CUT 6

PRINT UP 4

PRINT UP 3

PRINT UP 2

PRINT 5/4 1

PRINT 5/4 0

PRINT 5/4 ADD×

PRINT 5/4 ADD+

ITEM+ 5/4 ADD+

ITEM+/– 5/4 ADD+

OFF

4. DIAGNOSTICS

OPERATION

1 0 00

8 – ÷9 % ◊/#

1 2 3 4 ÷

7 6 5 +

M+

M–

÷5 MU/MD

M◊

M❊

CA 1 ÷ ÷ 1 =

×1 –1 –

◊/#

– ❊

G❊

FEED

▲

DISPLAY

1000.

-888.888888888

-888.88888888

1234.

1.61307189542

M 1.613071

M 1.6131

M 1.614

M 1.54

M 3.1

M 5.

1.613

K 0.01

–0.02

–0.03

NO Display

— 4 —

1) Does not work

at all.

2) No display.

3) No print.

4) Poor display.

5) Poor printing

• Motor does

not stop.

• Missing of

digits. • Refer to the printer service manual published separately.

VDD, VSS, VM, VF1, and

VF2 are OK?

Check the pulse signals

from LSI.

If VF1, VF2, Digit and

Segment signals are OK.

VM=11V±5%(whileprint-

ing)

Check detector of printer

block and timing signal.

Secondary voltage

of transformer

Waveforms of each

VF1, VF2

Signal D1 ~

S1 ~

Between LSI and

display tube

Trouble Cause Checkpoint Note

5. TROUBLESHOOTING

• Defective power transformer

• Defective LSI

• No voltage at VF1, VF2

• No digit signal or no segment

signal

• Defective display tube

• Poor voltage VM

• Defective motor

• Defective LSI

•Short or open circuits between

digit signals and segment sig-

nals.

• Defective display tube

• Timing signal is bad.

• Defective printer magnet

— 5 —

6. DISASSEMBLY VIEW

— 6 —

7. SCHEMATIC DIAGRAMS

7-1. Main PCB

POWER CORD

286S0255-1 (USA, CANADA)

EP-483-E03 (EUROPE, SAUDI)

SP-852-J03 (AUSTRALIA)

SE-225-1D1U (USA, 120 V)

SE-225-1D1J (JAPAN, CANADA, 100/120 V)

SE-225-1D2 (EUROPE, 230/240 V)

— 7 —

7-2. Keyboard PCB

— 8 —

7-3. Slide Switch Board PCB

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