Casio DR-120LB, DL-200L, DL-210L, DR-320B Service 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

R

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. SPECIFICATIONS

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

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

Sent signal
S1~S7, SAP, SDP

SO1~SO7

Slide switch

SI1~SI3, SI5

CPU

MN158418YCY

KO1 ~ KO8

Keyboard

KI1 ~ KI6

VDD (32 V, 30 mA)
VSS (27 V, 30 mA)

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

Digital signal
D1~D13

Ribbon shift signal
Character selective signal

Timing pulse

Motor control signal

Printer

M-80

VM (11 V, 200 mA)
VDD

Power supply

circuit

— 1 —

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 IR Q In Timing pulse signal from printer
14 DEBIN In Reset p u l s e ( N o t u s e d )
15 IRQCN T In Auxiliary timing (VDD)
16 P40 Out Motor control signal
17 P41 Out Ribbon shift signal for printer

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

P70 ~ P73, P80 ~ P82

31, 32 P83, P90 Ou t 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, Ou t 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

— 2 —

4. DIAGNOSTICS

STEP

1
2
3
4
5
6
7

8

9
10
11

12

13

14
15

MODE SWITCHES

ON F 6
ON F 6
ON F 6

ON F 6
PRINT F 6
PRINT 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×

OPERATION

1 0 00

8 – ÷ 9 % ◊/#

CA

1 2 3 4 ÷

7 6 5 +

M+
M+
M–

÷ 5 MU/MD

M◊

M❊

C

-888.888888888

▲

+

+

-888.88888888

1.61307189542
M 1.613071
M 1.6131
M 1.614
M 1.54

M 3.1

M 5.

DISPLAY

1000.

1234.

1.613

1.613

0.

0.

PRINT

NOTE

The character with "[ ]"
will be printed by red
ink.

16

PRINT 5/4 ADD×

17

PRINT 5/4 ADD+

18

PRINT 5/4 ADD+

19

ITEM+ 5/4 ADD+

20

ITEM+/– 5/4 ADD+

21

ITEM+/– 5/4 ADD+

CA 1 ÷ ÷ 1 =

× 1 – 1 –

◊/#

◊/#

– ❊

G❊

K 0.01

–0.02

–0.02

–0.02

–0.03

–0.03

22

ITEM+/– 5/4 ADD+

23

OFF

FEED

NO Display

— 3 —

Paper feeding

Press the button 3
seconds continuously.