EL2901

User Manual: EL2901

Open the PDF directly: View PDF .
Page Count: 11

Download
Open PDF In Browser	View PDF

SERVICE MANUAL
EL-2901E
EL-2901C
MODEL EL-2192P
KEY LAYOUT
12

STANDARD FUNCTION
D
I
S
P
L
A
Y
S
E
C
T
I
O
N

digits

1M

M
EG
ON

ELEMENT : LCD
NUMERAL : 12

F 3 2 1 0 A 5/4 ↓ GT · OFF · P P·IC

PARTS NAME : 9060ATRH
digits

SYMBOL :

CHARACTER PITCH : 9.0mm

2

digit(s)

M

18.75

EG
6.9

L
S
I

Name :

u3866-015H

Type

:

CHIP

Pin

:

76 pins

GT

÷

7

8

9

STR

=

4

5

6

TAX+

×

1

2

3

TAX-

C/CE

+

for SEEG :

AC : O

BATTERY TYPE

AC only

MU

∗M

%

◊M

# / ◊ M−

∗

00

(mm)

POWER SUPPLY

TAX- TAX+

M+

100

DC : X
KEY SYSTEM : Plastic key + Key rubber

AC ADAPTER
RECHARGEABLE BATTERY

MODEL NAME

MFL87 (KI-OB1078CCZZ)

PRINTING SYSTEM

Serial print system

30mA : AAC, ABC, AC7, TLC
5.2W, 47mA : UIC

PRINTING CAPACITY
P
R
CHARACTER DIMENSION
AUTO POWER OFF TIME
I
1
N INPUT BUFFER
MEMORY PROTECT
Yes* (TAX / EURO only)
T
DIMENSIONS (mm)
200 (D) x 251(W) x 60 (H) mm E PRINTING SPEED
R
PAPER FEED SPEED
CALCULATIONS
POWER CONSUMPTION

0

−

Four arithmetic calculations, Constant calculation,
Power calculation, Reciprocal calculation, Chain
calculation, % calculation, Add-on (discount)
calculation,memory calculation, adding mode, etc.
NOTE) *1 : This calculator operates only on AC power.
Further, the memory is retained only while the
AC cord is plugged in and clears when the AC
cord is disconnected.

S
E
C
T
I
O
N

PAPER RELEASE MECHANISM

19 digits
1.6(W)

3.5 (H)

mm

12 stages
Approx. 2.6 lines / sec.
Approx. 8.5 lines / sec.
Yes

INK RIBBON
INK ROLLER
PAPER
PAPER SIZE (Roll Paper)

Black : EA-781R-BK, Red : EA-781R-RD
Plain paper
58 +0
-1 mm (W), 80mm in diameter (max.)
(DPAPR1004CSZZ...5 rolls / pack)

Parts marked with " " is important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.

SHARP CORPORATION

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

3-2. Cautions for handling

1. Block diagram

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

LCD

AC input

Power supply
circuit

LSI

Key,SL-SW

D
Printer

Driver

C
: Power supply line
: Signal line

E

A

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.

B

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

Model name

SPEC
CODE

Tax
function

EL-2192P

U1C

O

EL-2901E

AC7

EL-2901C

AAC /
ABC /
TLC

EURO
exchange
function

3) Do not turn the pulley C manually.
Country
SECL

O

SEEG

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.

O

SUK, SCA, Agent


Either of the Tax and Euro exchange functions can be selected by
changing the signal with the jumper cables on the KEY PWB.

3-3. Detecting Mechanism
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

This machine is an AC type which retains Tax data (tax rates and
others) and EURO exchange data in memory only while the AC cord is
plugged in. Therefore, data in memory cannot be retained if the AC
cord is disconnected.

Sensor gear unit

3. PTMFL87 PRINTER CAUTION NOTES

S SD C

3-1. Servicing
The printer model PTMFL87 (Ki-OB1078CCZZ) used for the EL-2192P
/ EL-2901C / 2901E is available for service by an entire unit and
therefore none of individual service parts is available for supply.

R

Fixed contact-piece unit

Fig. 1 Detecting Mechanism

Fig. 2 Equivalent Circuit

Standard signal(SD)

S74

Set signal(S)

S0

S1

Reset signal( R)
CP73

CP74

Character position
signal(CP)
Standdard position
signal(SP)

Fig. 3 Time Chart

CP0

CP1

The character position detecting signal (CP) is to be made by the user
from the leading edges of the set signal and reset signal. This CP
corresponds to the character on the character belt. The standard signal (SD) is a signal output once to the 75CP pulse, and the signal to
be made by the user utilizing the leading edge of the second CP from
the leading edge of this signal is the standard position signal (SP).
The reason why CP and SP are made using the raw signals output
from the detector is that the effect of chattering is taken into consideration.
The following will explain the basic operation.

counted.
9) The motor driving signal is turned OFF after 19CP counting after
the paper feeding is started. In case SP is not found within 19CP
after the paper feeding is started, it is turned OFF after SP is
detected.

Motor driving signal(MT)
Standard pisition
detection signal(SP)
Character position
detection signal(CP)
Electromagnetic
clutch signal(TM)

0

16

89

22

17

23

24

25

27

28

t0

0
19CP(mim)

T3

T4

Carry gear operation

3-4. Operation Sequence

Paper reeding operation

The basic operation is explained

Rack operation

(1) Initialization

Hammer operation

In order to make sure that the hammer holder is at its home position,
i.e. the first column, print the space after power is turned on, and after
the carry / return, do one-line paper feeding and set the hammer
holder at its home position. This completes the initialization.

Carry operation

Printing pattern through
the adove operation
0.

*

Motor driving signal(MT)
Standard pisition
detection signal(SP)

0

Character position
detection signal(CP)

89

21

0

Fig. 5 Time Chart for 1-Line Printing (0. |___| * printing)

(3) Continuous printing operation

Electromagnetic
clutch signal(TM)

1) After the 1-line printing operation in (2), the motor driving signal
(MT) is not turned OFF and the operations 2) through 8) are continuously done for the necessary number of columns while the
motor is run.

Carry gear operation
Paper reeding operation
Rack operation

2) After the most significant digit of the last line is printed, the operations 7), 8) and 9) in (2) are done and the motor is stopped.

Hammer operation
Carry operation

(4) Paper feeding operation
Fig. 4 Time Chart at Initialization

(2) 1-line printing operation
1) The printing operation is started by setting the motor driving signal
(MT) ON.
2) Prior to 1-line printing, detect the standard position signal (SP)
once and make the time from the leading edge of the character
position detection signal CP8 to the leading edge of CP9 to and
make it standard pulse width. (This to setting must be done at the
initialization and prior to the 1-line printing. to is utilized for error
detection.)

For the paper feeding operation, 1-line printing of space may be done
in the same way as for the printing operation sequence.

3-5. Troubleshooting dislocated print belt
Install the character belt on the drive pulley and driven pulley. When
installing the character belt, the following points must be considered.
1) If the driven pulley is removed and mismatched with the CC cam, it
should be aligned as follows.

CC cam

3) The character belt rotates until the desired CP pulse is detected.
4) If the desired CP pulse is detected, power is supplied to the electromagnetic clutch unit, the character belt is stopped, and printing
operation / carry operation are done. In the meantime, the power to
the electromagnetic unit is cut off. (For the detail, see 1.3.2.Printing
/ Carry Mechanism.)
5) After completion of the printing / carry operation, the character belt
rotates again.
6) The operations 3) through 5) are repeated and 1-line printing is
completed.
7) After the most significant digit printing, the electromagnetic clutchsignal TM becomes OFF, and then between T3 and T4, paper
feeding / column return operation is done by turning the electromagnetic clutch ON again.
T3 = 80 to 200 m sec
T4 = (2.0 ~ 2.4) x Tcp
8) After paper feeding is started, it is completed when about 19CP is

Boss of
frame
Frame hole
(Driven hole
inserting part)

Hole
Driven pulley

2) The character belt should be positioned as follows.
Manually turn the motor to the position where the SD pulse appears.

· A. Drive pulley side

4-2. Tightening torgue value

Adjust the "–" of the character belt to the position of the hole (mark).
("–" shown in the above arrangement of characters)

1) Key PWB : 1.5 0.2kg

Cutout
UPPER CASE

Driven pulley

1
2

2

4

3

5
6

· B. Driven pulley side
Hole(mark)

UPPER CASE

Adjust the center of the space of the character belt to the position of
hole (mark).
1

4. Note for disassembly and assembly

2

4-1. Disassembly of upper / lower cabinets
6

1) Hold the bottom housing and push down the upper housing at
circled 1 and slide the upper housing outwards.

3
5

2) Do the same at circled 2 and then 3.

4

1
2

2) Lower case : 2.5 0.5kg

3x8

3

LOWER CASE

List of destinations (Destinations are determined
by the name plate voltage and the plug shape. )
To identify destination

Destination

Name plate voltage

Major shipping country

U1C

120V 60Hz

1

Canada

AAC

220-230V 50Hz

2

U. Kingdom

ABC

230-240V 50Hz

3

Austraria

220-230 50Hz

4

Germany, Agent

AC7, TLC

Remarks

Plug shape No.

AC cord
NO.

PARTS CODE

PRICE
RANK

TYPE OF LEAD
2 LEAD

MODEL NAME

DESCRIPTION

3 LEAD

EL-2901C

1

AP

O

AC cord U1C

2

AZ

O

AC cord AAC

O

3

AS

O

AC cord ABC

O

4

AP

O

AC cord AC7, TLC

O

EL-2901E

EL-2192P
O

O

Plug shape

0GS5420150////

0GS5420220////

1

2
(U1C)

0GS5420170////

(AAC)

0GS5420160////

3

4
(ABC)

(AC7,TLC)

7

6

5

4

3

The S/L switch uses a key sheet (carbon printed)

3

2

2

1

1

C

D

A

Silver foil

Carbon printed
(Resistance: below 300Ω

4

A

LCD unit

5

B

8

6

B

C

D

7

5. CIRCUIT DIAGRAM

8

6. PWB LAYOUT
(1) MAIN PWB

(2) KEY PWB

(2) KEY PWB
(OPEN) TAX specifications
(SHORT) EURO specifications

EL-2901E/C
EL-2192P

■

Parts guide

1 Exteriors
NO.

!
!
!

!
!
!
!

PARTS CODE

1 0GS6177490////
2 0GS6345100////
0GS6143250////
3 0GS6143260////
0GS6143270////
4 0GS6177860E///
5 0GS6177860B///
6 0GS6177860D///
0GS6177860F///
7
0GS6177870F///
8 0GS6177500A///
9 0GS6177500C///
10 0 G S 6 1 7 7 5 0 0 G / / /
11 0 G S 6 3 4 5 1 2 0 / / / /
12 0 G S 6 1 1 6 7 2 0 / / / /
13 0 G S 6 1 7 7 5 4 0 / / / /
14 0 G S 6 1 7 7 8 5 0 / / / /
15 0 G S 6 1 7 7 8 4 0 / / / /
16 0 G S 6 1 7 7 5 2 1 / / / /
17 0 G S 6 1 7 7 5 1 1 / / / /
18 0 G S 6 3 4 5 1 1 0 / / / /
19 0 G S 6 3 1 4 4 2 0 / / / /
20 0 G S 5 5 3 3 3 5 0 / / / /
21 X U B S D 2 6 P 0 5 0 0 0
22 K I - O B 1 0 7 8 C C Z Z
23 0 G S 5 1 1 0 2 7 0 / / / /
24 0 G S 6 3 1 4 4 3 0 / / / /
25 0 G S 2 1 9 2 L C D / / / /
26 0 G S 6 3 1 4 4 7 0 / / / /
27 0 G S 5 1 1 0 2 6 0 / / / /
28 0 G S 2 1 9 2 P W B / / / /
0GS3120060////
29 0 G S 3 1 2 0 0 7 0 / / / /
0GS3120080////
30 0 G S 6 3 1 4 2 5 0 / / / /
31 0 G S 6 1 2 6 5 5 0 / / / /
32 X U P S N 3 0 P 0 8 0 0 0
33 0 G S 6 3 2 2 0 0 0 / / / /
0GS5420150////
0GS5420160////
34
0GS5420220////
0GS5420170////
35 P T U B U 1 0 0 4 C C Z Z
0GS9432130////
0GS9432170////
36 0 G S 9 4 3 2 1 4 0 / / / /
0GS9432150////
0GS9432160////

PRICE NEW
RANK MARK
AG
AF
AS
N
AS
N
AS
N
AD
N
AE
N
AG
N
AD
N
AD
N
AH
AC
AC
AC
AU
N
AD
AC
N
AC
N
AC
N
AC
N
AC
AF
N
AP
N
AA
BC
AD
N
AD
N
AY
N
AE
N
AF
N
BF
N
AX
N
AZ
N
AZ
N
AD
AU
N
AA
AC
AP
N
AP
N
AZ
N
AS
N
AA
AD
N
AD
N
AD
N
AD
N
AD
N

PART
RANK
C
D
D
D
D
C
C
C
C
C
C
C
C
C
D
C
C
C
C
C
C
C
C
C
E
C
D
E
C
C
E
B
B
B
C
D
C
D
B
B
B
B
C
D
D
D
D
D

DESCRIPTION
Paper cutter
Paper holder
Display window (EL-2192P)
Display window (EL-2901E)
Display window (EL-2901C)
Key top (HALF)(3KEY)
Key top (MEMORY)(5KEY)
Key top (FUNCTION)(9KEYS)
Key top (TAX)(2KEY)
Key top (EURO)(2KEY)
Key top (NUMBER)
Key top (-)
Key top (+)
Key top bar
Upper case
SL-SW arm
SL-SW mask-L (BLINDER)
SL-SW knob-L
SL-SW mask-S (BLINDER)
SL-SW knob-S
SL-SW contact
SL-SW sheet (SPACER)
Key rubber
Screw (2.6´5)
Printer unit (MFL87)
Flat cable (P/H,M/B)
Back-up tape (FOR H/SEAL)
LCD unit (LCD + H.M.F)
Insulation sheet (45´40´0.1)(FOR FLAT CABLE)
Flat cable (M/B,K/B)
PWB unit (PWB + LCD + H.M.F)
Transformer (120V)(for CANADA)
Transformer (220-230V)
Transformer (230-240V)(for AUSTRALIA)
LCD cushion
Lower case
Screw (3´8)
Foot rubber
AC cord (for CANADA)
AC cord (for SEEG)
AC cord (for ENGLAND)
AC cord (for AUSTRALIA)
Protection tube (M4)
Rating label
Rating label
Rating label
Rating label
Rating label

–1–

[EL-2192P]
[EL-2901E]
[EL-2901C:AAC,ABC,TLC]

[EL-2192P,EL-2901C]
[EL-2901E]

[for PWB,P/H]

[EL-2192P]
[EL-2901E,EL-2901C:AAC,TLC]
[EL-2901C:ABC]

[for CABINET]
[EL-2192P]
[EL-2901C:AC7,TLC]
[EL-2901C:AAC]
[EL-2901C:ABC]
[EL-2192P]
[EL-2901E]
[EL-2901C:AAC]
[EL-2901C:ABC]
[EL-2901C:TLC]

EL-2901E/C
EL-2192P

1 Exteriors
1

4
7

3

6 5

2

9
6
8

5

11

10

12

13
14
15
18

13

17

16

21

22

17
18

21

21

21

21

21 21

19

23
25

24

26

35

20
27

21

21
21

30

30

32
31
33

32
32

–2–

33

28

21

29

34

32
36

CCP00076

EL-2901E/C
EL-2192P

2 Accessories
NO.

PRICE NEW
RANK MARK
AD
AP
N
AD
N
AC

PART
RANK
D
D
D
C

Manual(E/F/S)
MANUALManual
Manual(E/F/S)
Important label

PRICE NEW
RANK MARK
VRD-HT2EY822J
AA
VRD-HT2EY104G
AA
VRD-HT2EY204J
AA
VRD-HT2EY244J
AA
VRD-HT2EY122J
AA
VRD-HT2EY563J
AA
VRD-HT2EY102J
AA
VRD-HT2EY205G
N
VRD-HT2EY133J
AA
VRD-HT2HY331J
AA
VRD-HT2HY820J
AA
VRD-HT2HY511J
AA
VRD-HT2EY823J
AA
RMPTC5823QCKB
AB
VCEAGU1CW228M
AE
VCEAGU1CW227M
AB
VCEAGU1HW105M
AA
VCKYPU1HB102K
AA
VCKYPU1HB103K
AA
VCTYPU1EX104M
AB
VS2SC1815-GRC
AB
VS2SC3068-/-1
AD
VS2SC3070-/-1
AE
VHEHZ6B1L//-1
AA
VHD10E1N///-1
AB
VHDDSS131//-1
AA
0 G S 3 6 1 0 3 3 0 / / / / AE
0 G S 3 6 1 0 3 5 0 / / / / AF
N
0 G S 2 1 9 2 L C D / / / / AY
N
KI-OB1078CCZZ
BC
(Unit)
0 G S 2 1 9 2 P W B / / / / BF
N

PART
RANK
C
C
C
C
C
C
C
C
C
C
C
C
C
B
C
C
C
C
C
C
B
B
B
B
B
B
A
A
E
E

Resistor (1/4W 8.2KW ±5%)
Resistor (1/4W 100KW ±2%)
Resistor (1/4W 200KW ±5%)
Resistor (1/4W 240KW ±5%)
Resistor (1/4W 1.2KW ±5%)
Resistor (1/4W 56KW ±5%)
Resistor (1/4W 1.0KW ±5%)
Resistor (1/4W 2MW ±2%)
Resistor (1/4W 13KW ±5%)
Resistor (1/2W 330W ±5%)
Resistor (1/2W 82W ±5%)
Resistor (1/2W 510W ±5%)
Resistor (1/4W 82KW ±5%)
Block resistor (82KWX5 1/8W ±10%)
Capacitor (16WV 2200mF)
Capacitor (16WV 220mF)
Capacitor (50WV 1mF)
Capacitor (50WV 0.001mF)
Capacitor (50WV 0.01mF)
Capacitor (25WV 0.1mF)
Transistor (2SC1815-GRC)
Transistor (2SC3068)
Transistor (2SC3070)
Zener diode (HZ6BL1)
Diode (10E1N)
Diode (DSS131)
Fuse (250V/750mA)
Fuse (250V/800mA)
LCD unit (LCD + H.M.F)
Printer unit (MFL87)

PARTS CODE

0GS9208860////
1 0GS9208920////
0GS9208910////
2 0GS9464640////

DESCRIPTION
[EL-2192P]
[EL-2901E]
[EL-2901C]
[EL-2901C:AAC]

3 PWB unit
NO.

!
!

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
101
102
901

PARTS CODE

E

DESCRIPTION

PWB unit (PWB + LCD + H.M.F)

–3–

[R1]
[R2]
[R3]
[R4,R5,R6]
[R7]
[R8,R10]
[R9]
[R11]
[R12]
[R13]
[R14]
[R15]
[R16]
[RP1,RP2]
[C1]
[C2]
[C4]
[C5,C6,C7]
[C8,C9]
[C10]
[Q1]
[Q2]
[Q3]
[ZD1]
[D1,D2,D3,D4]
[D5,D6,D9,D10]
(EL-2192P)[F1]
(EL-2901E/C)[F1]

COPYRIGHT ã 1999 BY SHARP CORPORATION
All rights reserved.
Printed in Japan.
No part of this publication may be reproduced,
stored in a retrieval system, or transmitted.
In any form or by any means,
electronic, mechanical, photocopying, recording, or otherwise,
without prior written permission of the publisher.

SHARP CORPORATION
Information Systems Group
Quality & Reliability Control Center
Yamatokoriyama, Nara 639-1186, Japan
1999 July Printed in Japan