Casio FX-D400 Troubleshooting guide

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DEC. 1992

fx-D400(LX-350)

fx-P401(LX-351)

R

(without price)

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CONTENTS

1. SCHEMATIC DIAGRAM

1-1. Main Board-1 (fx-D400) ...................................................................1

1-2. Main Board-1 (fx-P401) ...................................................................2

1-3. Display Block (fx-D400/P401) .........................................................3

1-4. Main Board-2 (fx-D400/P401) ..........................................................4

2. SPECIFICATION.........................................................................................5

3. OPERATION CHECK ................................................................................6

4. ASSEMBLY VIEW .....................................................................................8

5. PARTS LIST...............................................................................................9

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— 1—

1. SCHEMATIC DIAGRAM

1-1. Main Board-1 (fx-D400)

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— 2—

1-2. Main Board-1 (fx-P401)

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— 3—

1-3. Display Block (fx-D400/P401)

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— 4 —

1-4. Main Board-2 (fx-D400/P401)

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— 5 —

2. SPECIFICATION

Display: 16 digits dot matrix display, 10-digit mantissa plus 2-digit exponent

Power source: One button-type battery (type; LR44, SR44)

Power consumption: 0.0001 W

Battery life: Approximately 4,000 hours (continuous use) on type SR44 battery.

Approximately 2,000 hours (continuous use) on type LR44 battery.

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

Dimensions: 9.7mmH ×74mmW ×141mmD (3/8”H ×27/8”W ×51/2”D)

Weight: 65g, (2.3oz.) including battery

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— 6 —

3. OPERATION CHECK (fx-D400)

OPERATION DISPLAY

POWER OFF

hqi

while pushing

h

and

q

, push

i

i

i

i

i

p0123Aq45/

647+e9-8ry

il*2Z

L;zx

ffgu

vbnm,

iscsl2Z

wct2Z

EZ~

d

ai

hqi

while pushing

h

and

q

, push

i

iiii

ai

No display

No display

All dots display

Checker

Reverse checker

ON D

–

ON D 1.

ON D 4.

ON D

°sinh cos tan–

ON D

'

2log–

ON D

'

2logIn–

ON D 2.

ON D

250.E-0.3

ON↓D

1.u 2.m 3.k 4.M

No display

No display

No display

ON D

–

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— 7 —

OPERATION DISPLAY

POWER OFF

hqi

while pushing

h

and

q

, push

i

i

i

i

i

p0123Aq45/

647+e9-8ry

il*2Z

L;zx

ffgu

vbnm,

iscajk2

Zwct2Z

d

ai

hqi

while pushing

h

and

q

, push

i

iiii

ai

(fx-P401)

No display

No display

All dots display

Checker

Reverse checker

ON D 1.

ON D

–

ON D 2.

ON D

'

2logIn–

ON D

'

2log–

ON D

°sinh cos tan–

ON D 4.

ON↓D

1.u 2.m 3.k 4.M

No display

No display

No display

ON D

–

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— 8 —

4. DISASSEMBLY VIEW

G

AB

1

0

H

CD

9

8

EF

37

6

45

I

2

D

D

D - D

a

a

a

a

a

a

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