SHARP EL1801C
Manual de Servicio

1. Block diagram
LCD

3-2. Cautions for handling
(1) Cautions for holding
Hold the sections shown with the arrows to carry the printer.

AC input AC adaptor Battery

Power supply circuit

LSI

Key,SL-SW

D
Driver Printer

C
: Power supply line : Signal line

2. Tax/Euro exchange functions
LSI used for this machine has a tax function and a EURO exchange function. Either function is selected depending on the destination of the product. EURO exchange function SECL O O SEEG SUK, SCA, Agent 1) PWB A

A

E

B

(2) Sections which a force must not be applied to :
2) Do not turn the front belt B manually.

Model name EL-1801C EL-1801E EL-1801C

SPEC CODE Y1C LC7 LLC

Tax function O

3) Do not turn the pulley C manually. Country 4) Do not apply a force to the hammer holder D.

(3) Sections which must not be touched :
1) Do not touch the shaft E with a bare hand. 2) Do not touch the font belt B with a bare hand.

3-3. Detecting Mechanism
<Selecting between Tax/EURO exchange functions> Either of the Tax and Euro exchange functions can be selected by changing the signal with the jumper cables on the KEY PWB. <Backup of Tax/EURO exchange functions> This machine is an AC/DC type which retains Tax data (tax rates and others) and EURO exchange data in memory only when power is supplied from the battery or an AC adapter. Therefore, data in memory cannot be retained if the AC adapter is disconnected. (Data in memory cannot also be retained when batteries are changed.) The detector is of mechanical contact type and consists of the code plate to output the character position detection signal to correspond to each character on the character belt, sensor gear unit to output the standard position signal, and fixed contact-piece unit.

Code plate

Sensor gear unit

3. PTMFL7756A PRINTER CAUTION NOTES
3-1. Servicing
The printer model PTMFL7756A (Ki-OB1085CCZZ) used for the EL1801E / EL-1801C is available for service by an entire unit and therefore none of individual service parts is available for supply.
Fixed contact-piece unit

S SD C

R

Fig. 1 Detecting Mechanism

Fig. 2 Equivalent Circuit

Standard signal(SD)

Set signal(S)

S74

S0

S1

Reset signal( R) CP73 Character position signal(CP) Standdard position signal(SP) CP74 CP0 CP1

Fig. 3 Time Chart