Sharp XE-A402 Service Manual download pdf (Page 10)

PC-UM10M

XE-A402 HARDWARE DESCRIPTION

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5-3. KEYSCAN MATRIX

PENDING

Others

5-4. DISPLAY (PENDING)

The A401 has an LCD display, 5 x 7 dots, 2 lines, at the front side and a

7-digit LED at the pop-up side.

• Display DIGIT signal

The above ST0 ~ ST6 are display digit signals.

ST0: 1st digit ~ ST6: 7th digit

• Display SEGMENT signal

The LED segment signal is outputted by writing SEGMENT data in

the /CS3 space.

Correspondence of DATA ~ SEGMENT

D0 ~ D6

A ~ g

6. POWER SUPPLY

7. REWRITING FLASH MEMORY

IPL from EP-ROM:

After IPL SW is set to ONA the program is started

from EP-ROM by turning on the power.

The program on EP-ROM is transferred to flash

ROM by switching the banks through S-RAM.

IPL from COM:

Data from the PC is written to flash ROM through

the COM port. (Max. 38.4 kbps)

8. DRAWER

The A401 has a 1 channel of drawer port. (+ 1 channel is reserved for

the CPU PORT) O R No open sensor is provided.

The driving time for the DRAWER solenoid are as follows: 50ms (max)

45ms (min)

9. PRINT RATE

384 dots/1 line

10. A/D CONVERSION

The printer power supply voltage should be measured at more than 10

ms after the printer is turned ON.

11. BUZZER

PIEZO type BUZZER

The oscillating frequency is 4.0kHz

0.5kHz

12. RESET

The RESET signal is generated when:

1) The mode key switch is turned from SRV to a position other than

SRV’(excluding OFF).

2) The power is turned ON more than 10 seconds after the power is

turned OFF. (The reset signal may not be issued if the POWER-

OFF time is short.)

3) The mode key switch is turned from OFF to a position other than

OF (excluding the SRV position). (If the power-off time is less than 5

seconds, the reset signal may not be issued.)

CPU STO ST1 ST2 ST3 ST4 ST5 ST6 ST7 ST8 ST9

MODE P90 SRV PGM Time REG MGR X1/Z1 X2/Z2

Others P91 PF-R PF-J RPE HEAD

JPE DRAWER

OPEN

MRS RS/CI

FRONT:

POP UP:

VLED

VCC 5.0V

VDD 5.0

24V

BATTERY

/POFF detection

point

TRANS.

LM2574 +

power failure occurs..

PQ1CG2032

ON/OFF CONTROL

(MODE SW)

Measures should be taken to restore within 10 ms after a

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 24 25

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Sharp XE-A402 Service Manual Page 10

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