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.

5. TROUBLESHOOTING

Trouble Cause Checkpoint Note

1) Does not work
at all.

• Defective power transformer

Secondary voltage
of transformer

VDD, VSS, VM, VF1, and
VF2 are OK?

2) No display.

3) No print.

4) Poor display.

5) Poor printing

• Motor does

not stop.

• 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 sig­nals.

• Defective display tube

• Timing signal is bad.

Waveforms of each
pin

VF1, VF2
Signal D1 ~

S1 ~

Between LSI and
display tube

Check the pulse signals
from LSI.

If VF1, VF2, Digit and
Segment signals are OK.

VM = 11 V±5 % (while print­ing)

Check detector of printer
block and timing signal.

• Missing of
digits.

• Defective printer magnet

• Refer to the printer service manual published separately.

— 4 —

9

8

10

11

20

6

16

15

19

18

17

13

14

12

4

1

2

3

5

7

6. DISASSEMBLY VIEW

— 5 —

7. SCHEMATIC DIAGRAMS

7-1. Main PCB

POWER CORD
286S0255-1 (USA, CANADA)
EP-483-E03 (EUROPE, SAUDI)
SP-852-J03 (AUSTRALIA)

TR

SE-225-1D1U (USA, 120 V)
SE-225-1D1J (JAPAN, CANADA, 100/120 V)
SE-225-1D2 (EUROPE, 230/240 V)

— 6 —

7-2. Keyboard PCB

— 7 —

7-3. Slide Switch Board PCB

— 8 —

7-4. Printer Pin Arrangement Diagram

Connection Pin No. ConnectionPin No.

RD terminal

1

Character selective

15

magnet column No.1

(Not used)

Character selective
magnet column No.1

2

3

4

5

6

7

8

9

10

10

11

12

2

3

4

16

17

18

13

14

15

Notes:

1. Column numbers match

5

19

16

the physical arrange­ment of the columns on
the print wheels.

6

20

17

2. Column numbers are as­signed from 1 to 18 from

Ribbon shift magnet

7

21

the frame motor side.

3. Pin numbers are as­signed from 1 to 27 from

8

22

Electromagnet (+)

the frame motor side.

4. The spark arrestor diode
is connected as shown

9

M

23

Motor power
supply (+)

24

Detector power
supply (+)

Timing signal

25

Detector power

26

supply (–)

below.

Electromagnet (+) Driver

(Example of compatible diode:
1S2075K or equivalent)

Motor power

11

13

27

supply (–)

14

12

Motor power ON/OFF

Timing signal

Character selective magnet No.n

T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12

*2

8.0ms min. 2.0ms min.

0.7ms max.0.7ms max.

0.7ms max.0.7ms max. 80.0ms min.

8

0.2ms max.

*1

TS T(0)

Ribbon shift magnet

(Print operation)

(Normal paper feeding operation)

Typ. 285.7ms

Notes:

1. The signals in must be prepared by the user.

2. The pulse is indicated by a dot-dash line (*1) is generated for continuous printing. The next print cycle can start
immediately after the leading edge of the timing signal Ts.

3. As shown by a dashed line (*2), the timing signal may go low at motor power-on or upon reception of a Print command.

— 9 —

8. PARTS LIST

N Item Code No. Parts Name Specification Q R

ABCD

LSI 2012 1295 LSI MN158418YCY
IC1, 2 2114 2436 Monolithic IC(Buffer) BA12003
Q1 2251 0525 Transistor 2SB1329-Q,R
Q2 2253 0469 Transistor 2SD1380-Q,R (ROHM)
Q3, 4 2252 0896 Transistor 2SC1740S-R,S
Q5 2250 0672 Transistor 2SA933S-R,S
Q6 2251 0581 Transistor 2SB1374-Q,R
Q7, 8 2259 1449 Digital transistor DTD114ES
D1~5 2390 0378 Diode 1SR139-100T-32-T
D6~8 2360 1946 Zener diode MTZJ5.6CT-77-T
D9~11 2301 0054 Diode 1S2472-T-77-T
D13, 14 2301 0101 Diode 1S2473-T-77-T 2222C
DIG1 3301 0217 Display tube 13-BT-144G

The following elecrical parts will be not supplied from CASIO.

1111
2222
1111
1111
2222
1111
1111
2222
5555
3333
3333

1111

B
B
B
B
B
B
B
B
C
C
C

A

C1 2845 3241 Semiconductive capacitor DD308-959F104Z50
C2 2803 9198 Electrolytic capacitor RE2-50V331M-T2
C3 2803 8199 Electrolytic capacitor RE2-25V222M-T50
C4 2813 3178 Semiconductive capacitor DD003-298B102K50
C5 2803 9197 Electrolytic capacitor RE2-16V100MA-T2
C6 2845 2170 Semiconductive capacitor DD308-959F224Z12
C7, C8 2813 3038 Semiconductive capacitor DD003-298SL101J50
R1 2606 1351 Carbon film resistor R-50X-6.8K-J-T24-T (6.8 Kohm, 1/2 W, ±5%)1111
R2 2606 2297 Carbon film resistor R-50X-5.6k-J-T24-T (5.6 K, 1/2 W, ±5%) 1111
R5 2614 0323 Carbon film resistor R-25-3.3K-J-T24-T (3.3 Kohm, 1/4 W, ±5%) 1111
R6 2614 0048 Carbon film resistor R-25-15K-J-T24-T (3.3 Kohm, 1/4 W, ±5%) 1111
R7 2614 0234 Carbon film resistor R-25-1K-J-T24-T (1 Kohm, 1/4 W, ±5%) 1111
R8 2614 0561 Carbon film resistor R-25-3.9K-J-T24-T (3.9 K-2) 1111
R9 2614 0579 Carbon film resistor R-25-470-J-T24-T (470 ohm, 1/4 W, ±5%) 1111
R10 2614 0471 Carbon film resistor R-25-270-J-T24-T (270 ohm, 1/4 W, ±5%) 1111
R11 2614 0188 Carbon film resistor R-25-390-J-T24-T (390 ohm, 1/4 W, ±5%) 1111
R12 2614 0749 Carbon film resistor R-25-5.1K-J-T24-T (5.1 K-2) 1111
R13 2621 6397 Carbon film resistor R-50X-22-J-T24-T (22 ohm, 1/2 W, ±5%) 1111
R14 2606 1344 Carbon film resistor R-25-6.8K-G-T24-T (6.8 K, 1/2 W, ±5%) 1111
R15 2614 1311 Carbon film resistor R-25-200-J-T24-T (200 ohm, 1/4 W, ±5%)
R17~R20 2775 3264 Metal film resistor RSMF1B220J (100 ohm, 1 W, ±5%)

COMPONENTS

N 1 6419 4320 PC joiner B-V298 HA310361-2
N 2 1014 9622 DIGITAL PRINTER M-80-021
N 3 6419 4130 UPPER CASE-Z517A HA110103-1
N 3 6419 4140 UPPER CASE-Z517B HA110103-2
N 3 6419 4150 UPPER CASE-Z517C HA110103-3
N 3 6419 4310 UPPER CASE-Z517D HA110103-4
N 4 6419 4160 LOWER CASE-Z517A HA110104-1
N 4 6419 4170 LOWER CASE-Z517B HA110104-2
N 4 6419 4180 LOWER CASE-Z517C HA110104-3
N 5 6419 4660 PRINTER COVER-Z517A HA110106-1
N 5 6419 4670 PRINTER COVER-Z517B HA110106-2 0111C
N 6 6419 4200 PAPER CUTTER-Z517 HA210052-1 1111C
N 7 6419 4190 SLIDE SWITCH-Z517 HA210051-1 3333X
N 8 6419 4220 KEY A-Z517 HA110107-1 1111C

Notes: N – New parts A: DR-120LB

Q – Quantity used per unit B: DR-320B

R – Rank C: DL-210L

— 10 —

1111
1111
1111
1111
1111
1111
2222

1111
4444

1111
1111
1000
0100
0010
0001
1000
0100
0011
1000

D: DL-200L

C
A
X
X
X
X
X
X
X
C

N Item Code No. Parts Name Specification Q R

ABCD

N 9 6419 3040 KEY B-Z517 HA310265-1
N 10 6419 3050 KEY C-Z517 HA310266-1
N 11 6419 3020 DISPLAY PLATE-Z517A HA1101105-1
N 12 6419 4240 C FILM-517 HA310352-1
N 13 6419 4250 SW SPACER-Z517 HA310351-1

14 6329 8310 CONTACT PLATE-G310 A45208-1
15 3012 1337 TRANSFORMER SE-225-1D1U (or T03411C)
15 3012 1316 TRANSFORMER SE-225-1D1J (or T03410D)

15 3012 1323 TRANSFORMER SE-225-1D2 (or T03412A)
N 16 3701 1114 POWER CORD 286S0255-1
N 16 3701 1106 POWER CORD EP-483-E04
N 16 3701 1115 POWER CORD SP-852-J03
N 17 6419 3030 RUBBER KEY-Z517 HA210062-1
N 18 4321 2280 PCB-Z517-2 HA210060-1
N 19 6419 4290 PC JOINER A-Z517 HA310361-1

1111
1111
1111
1111
1111
6666
1100
1010
0011
1110
0011
0010
1111
0111
1111

OTHERS

20 6416 8960 Roll arm R-L227B P340017-2

20 6416 8970 Roll arm L- L227B P340024-2
N 20 6419 5000 Roll arm R-L227A P340017-1
N 20 6419 5010 Roll arm L- L227A P340024-1

1000
1000
0111
0111

The Parts prices will be informed separately by Parts Price List.

C
X
X
X
C
C
B
B
B
C
C
C
C
X
X

A
A
A
A

Notes: N – New parts A: DR-120LB

Q – Quantity used per unit B: DR-320B

R – Rank C: DL-210L

D: DL-200L

— 11 —

MA0900461A