CASIO CE2350 Service Manual
SERVICE MANUAL
ELECTRONIC CASH REGISTER
CE-2350(EX-259)
JAN. 1995
INDEX
CONTENTS |
|
1. FEATURES.............................................................................................................. |
1 |
2. SPECIFICATION .................................................................................................... |
1 |
3. MAC (Memory All Clear) OPERATION .............................................................. |
2 |
4. DIAGNOSTIC OPERATION ................................................................................ |
3 |
4-1. How to start .................................................................................................. |
3 |
4-2. Mode switch and PAD status display check .................................................... |
4 |
4-3. Hard key code check .................................................................................... |
4 |
4-4. Hard check function ..................................................................................... |
5 |
5. OPTION CIRCUT ................................................................................................... |
8 |
6. CIRCUIT EXPLANATION ..................................................................................... |
9 |
6-1. Power supply circuit ...................................................................................... |
9 |
6-2. CPU ............................................................................................................. |
11 |
6-3. Motor error detection circuit .......................................................................... |
12 |
6-4. Mode key switch status read ......................................................................... |
13 |
6-5. RAM address / head drive signal switching circuit ............................................ |
13 |
6-6. Initilize IC (Reset IC) ...................................................................................... |
14 |
6-7. Printer error condition of CPU ........................................................................ |
14 |
7.TO OPEN THE UPPER CASE ............................................................................ |
15 |
8. PCB LAYOUT ........................................................................................................ |
16 |
9. CIRCUIT DIAGRAM .............................................................................................. |
17 |
10. PARTS LIST ........................................................................................................ |
28 |
1. FEATURES
The differece between CE-2300 and CE-2350 is as follows;
Item |
C E - 2 3 0 0 |
C E - 2 3 5 0 |
|
|
19 x 2 |
Department number |
8 |
(for using DEPT SHFT key) |
PLU number |
200 |
400 |
Clerk number |
4 |
10 |
Post-finalization receipt printing |
24 lines |
52 lines |
Total/Change indicators |
Mounted |
Nil |
RAM capacity |
8 KBytes |
32 KBytes |
2. SPECIFICATION
2-1. Electrical specifications |
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Power consumption : |
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|
Specification : |
0.35A |
|
In operation |
Max. |
0.22A |
Stanby |
Min. |
0.09A |
Power OFF |
|
0.08A |
Memory protection
Back-up battery : Back-up period : Battery life :
Mangan battery (UM-3 x 3 pcs.) 1 year (25°C)
Replace the battery every year.
Clock & Calendar
Accuracy : Within 120 sec. per month (25°C)
Auto calendar : Effective until 2099 A.D.
2-2. Environmental specifications
Operating temperature : |
0°C ~ 40°C |
Operating humidity : |
10 % ~ 90% |
Storage temperature : |
-25°C ~ 65°C |
Storage humidity : |
10% ~ 95% |
Vibration strength : |
1.5G (The machine must be inthe carton box.) |
2-3. Principal components
CPU : |
Name : |
uPD75516GF-351-3B9 |
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Number of control bit : 4 |
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Internal RAM : |
512x 4 bits |
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Internal ROM : |
12160 x 8 bits |
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Main system clock : |
4.19 MHz |
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Sub system clock : |
32.768 Khz |
1
RAM : |
Name : |
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Capacity : |
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Printer : |
Name : |
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Print method : |
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Receipt number : |
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Print digit : |
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Printing speed : |
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MCBF : |
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Paper width : |
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Paper diameter : |
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Paper thickness : |
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Ink roll : |
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Ink roll life : |
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Display : |
Name : |
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Number of digit : |
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Power transformer : |
Name : |
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Keyboard : |
Input system : |
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Drawer : |
Name : |
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2 -3 .O p ti on
Wet cover |
Name : |
Power protection battery :
Drive period :
Drive conditions :
Charging time :
LC36256PLL 32 KB
CR-710-001
Rubber-type inner-hummer printing system 2 receipt (Receipt & Journal)
12 digits
(Numeric : 10 digits, Symbol : 2 digits) Approx. 2.4 lines/sec.
1,500,000 lines
W44.5 ± 0.5 mm
83 mm or less
0.06 ~ 0.09 mm IR-93
400,000 lines
LED (HDSP-5261)
8 digits (LED x 4 pcs.)
TE-233-E4D
2 keys roll over
DL-2416 (D-15TC-A55SP-1*) M type drawer for U.S.A.
DL-2351 (D-15TC-A54SP-1*) M type drawer for Canada
WT-63
B-6
Approx. 3 hours with the following conditions
Processing time : |
60 sec./ customer |
Quantity of sales : |
8 items / customer |
Registered amounts : |
3 digits / item |
Number of customer : |
25 persons / hour |
8 hours to full charge |
|
3. MAC (Memory All Clear ) OPERATION
Procedure
(1)Plug the power cord into an outlet.
(2)Pressing the JOURNAL FEED button and turn the mode switch to Z position.
(3)Release the JOURNAL FEED button. After few seconds, MAC operation will be executed.
(4)The following receipt will be issued, if completed.
2
Date
Time
Consecutive No.
MAC print
Note :
1.After initialize operation, the clock counts from 00 : 00 A.M. and also the calendar is started from 00 - 00 - 00.
2.If the memory of RAM is broken, the machine will be initialized after power on.
4. DIAGNOSTIC OPERATION
4-1. How To Start
1)Plug the power cord into an outlet.
2)Execute the MAC operation.
3)Turn the mode switch to "Z" position.
4)Input 99999999 and press the sub total button.
5)Start the diagnostic program and issued following receipt.
Note : If you have done the registration after MAC operation, the Diagnostic program can not start.
Date
Time
Consecutive No.
Start printing for diagnostic program
3
4-2. Mode switch and PAD status display check
When the Clear key is pressed or changing the position of mode switch, the machine displays the mode switch position.
2 |
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0 |
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1 |
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0 |
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0 |
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0 |
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Drawer status
PAD status
Receipt SW position
Mode SW position
Drawer status : 1 : |
Drawer open |
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0 : |
Drawer close |
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PAD status : |
PAD 1 |
PAD 2 |
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0 0 |
Short |
Short |
Canada |
0 1 |
Open |
Short |
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1 0 |
Short |
Open |
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1 1 |
Open |
Open |
U.S. |
Receipt switch position :
8 Receipt OFF
0 Receipt ON
Mode switch position : 1 : Z 2 : X
4 : REG
8 : RF
4-3. Hard key code check
When all keys except numerical keys, Clear key, RECEIPT FEED key, JOURNAL FEED key are pressed directly, the machine displays the hard key code as shown below.
2 3
Hard key code
4
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20 |
26 |
32 |
38 |
43 |
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Receipt |
Journal |
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C |
13 |
14 |
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19 |
25 |
31 |
37 |
42 |
FEED |
FEED |
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47 |
51 |
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7 |
8 |
9 |
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18 |
24 |
30 |
36 |
41 |
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46 |
50 |
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4 |
5 |
6 |
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17 |
23 |
29 |
35 |
40 |
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45 |
49 |
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1 |
2 |
3 |
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16 |
22 |
28 |
34 |
39 |
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44 |
48 |
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0 |
10 |
11 |
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15 |
21 |
27 |
33 |
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4-4. Hard check function
Enter 1 digit from numeral key and press the sub total button (ST), the following Hard check function will be executed.
(1) |
1+ST |
: |
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Display, RAM, Drawer, Printer check |
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(2) |
5+ST |
: |
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RAM read only check |
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(3) |
7+ST |
: |
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Voltage check of memory back-up battery |
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(4) |
8+ST |
: |
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Print all characters |
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(5) |
9+ST |
: |
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Display the time |
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4-4-1. Display, RAM, drawer and printer check |
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Operation : |
1 + ST |
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1) All segments turn on. |
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8 |
8 |
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8 |
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8 |
8. |
8. |
8. |
8. |
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2) Date and time set
Set the following data in the machine automatically.
Date : 1st January, 1992
Time : 12:34:00
3) RAM write and read check
The machine writes data into RAM and read out the data to compare with written data. When this check is finished correctly, the machine goes to check No. 4).
However, if an error is occurred, the machine sounds an error tone, prints the error receipt, and stops Hard check program.
Error receipt sample |
" -- -- |
" |
4) Drawer open check
Open the drawer.
5
5) Printing check
Print the following character.
Z 0 0 0 0 0 0 0 0 0 CA CD
6) Receipt issue
The following receipt is issued.
7) Test display
7 |
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6 |
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5 |
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4 |
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3 |
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2. |
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1 |
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0 |
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4-4-2. RAM read only check
Operation |
:5 + ST |
Note : Be sure to execute the RAM write and read check (1 + ST) before this check.
The machine reads out the data to compare with written data until an error is occurred and
brinks " -- " on the display during this check. |
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To stop this check, turn the mode switch to OFF position. |
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If an error is occurred, the machine sounds an error tone, prints " -- -- |
" on the |
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receipt, and stops this check. |
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4-4-3. Voltage check of memory back-up battery |
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Operation |
:7 + ST |
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Display the voltage of back-up battery in real time. (Measurement is Volt (V) level.) To stop this check, turn the mode switch to OFF position.
6
4-4-4. All characters print check
Operation |
: 8 + ST |
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4-4-5. Display the time |
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Operation |
: 9 + ST |
The machine display the time.
To stop this check, press the Clear key.
1 2 -- 3 4 01 The time counts up.
If you make following operation, the machine resets the time data and starts again. Operation : 9 9 + ST
4-4-6. How to release the diagnostic mode
Execute MAC operation.
7
5. OPTION CIRCUIT
Power protection battery B-6
Power protection battery B-6 os available fro CE-2350.
However, interface circuit is not mounted the machine.
When you use the B-6, mount the following parts.
Parts list for interface
Code No. |
Parts Name |
Specification |
Q’ty |
2200 3577 |
Transistor |
2SA1015(GR,O,Y) |
1 |
2301 0011 |
Diode |
1S2471 |
2 |
2310 3541 |
Zener diode |
RD12EB2 |
1 |
2600 7313 |
Carbon film resistor |
R-25-10K-J |
3 |
2614 0552 |
Carbon film resistor |
R-25-2K-J |
1 |
2801 7098 |
Electrolytic capacitor |
50RE2 |
1 |
6219 4553 |
Connector fixing plate |
E311094-1 |
1 |
6236 6180 |
P1625-06P connector ass’y |
E314531B-10(#22-200) |
1 |
Interface circuit for B-6
Pin assignment for B-6 connector
Pin No. |
Description |
1 |
F.G. (Green) |
2 |
Not used |
3 |
CS (Black) |
4 |
GND (Blue) |
5 |
Not used |
6 |
VP (Brown) |
8
6. CIRCUIT EXPLANATION
6-1. Power supply circuit
2 |
5 |
7 |
8 |
9 |
1
3 |
10 |
11
4
12
6
Q1 : Transistor for controlling voltage (VP)
Q2 : Transistor for voltage detection
Q3 : Transistor for controlling power down (PWD) signal
ZD2 : Zener diode for controlling base current of Q2
ZD3 : Zener diode for detecting power down (PWD) signal
After plug the AC cord into the outlet, the AC voltage (23.8V) appears at CN1 connector.
Then this voltage is rectified by the diode brige and it become constant voltage through the capacitor C1.
[Voltage VP]
A constant voltage (31.4V) appears on the “ 2 “ position. This voltage made from the constant voltage circuit consist of transistor Q1 and Q2, zener diode ZD2, resisror R7, R8, R12 and R13.
[Voltage VLED and VCC]
The voltage goes to pin No.1 of regurator IC1 and then it is out from pin No.2 of IC1 as stable voltage (5.6V).
Then this voltage down to 5 volts through the diode.
It is used for VCC ( for logic) and VLED (for display drive).
Also, it goes to pin No.4 of IC1 and using to control the output voltage level. Inductor L1 is used to stabilize the VCC voltage when the drawer opened.
9
[PWD signal]
After plug the AC cord into outlet, VP voltage appears on the base terminal of transistor Q3. When the VP exceeds 16 volts, Q3 is turned on by the differential voltage between base and emitter terminal of transistor Q3.
Then the PWD signal goes to GND level and informes “ Power ON “ to the CPU. When the VP drops less than 16 volts, Q3 is turned off.
Then the PWD goes high level since the PWD is pulled up to VDD.
When the CPU receives “ High “ signal of PWD, CPU goes to “ Power failure process “.
Note : During plug the Ac cord into outlet, all voltages are supplied to the PCB.
If you open the machine for repair, make sure plug off.
[Location for voltage check points]
Actual value on the E259-1 PCB (unitV)
Check point |
1 |
2 |
3 |
4 |
5 |
6 |
|
7 |
8 |
9 |
10 |
11 |
12 |
Power ON |
23.8(AC) |
31.4 |
25.2 |
7.61 |
24 |
8.2 |
|
8.1 |
0.6 |
0 |
5 |
5.6 |
5 |
Power cord off |
0 |
0 |
0 |
0 |
0 |
0 |
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0 |
0 |
4 |
0 |
0 |
0 |
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1 |
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10 |
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4
6
11
2
3
5
8
9
7
12
10
6 - 2 . CPU (uPD75516GF - 351 - 3B9)
Pin No. |
Signal |
Descriptions |
In/Out |
PW-ON |
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|
|
|
level |
1 |
AN0 |
Mode switch signal (RF,OFF,REG,X,Z) signal |
In |
2.0V |
2 |
AVREF |
VCC terminal (+5V) |
- |
5.0V |
3 |
VDD |
VDD terminal (+5V) |
- |
5.0V |
4 |
VDD |
VDD terminal (+5V) |
- |
5.0V |
5 |
P113 |
Motor drive signal (M4) |
Out |
Low |
6 |
P112 |
Motor drive signal (M3) |
Out |
High |
7 |
P111 |
Motor drive signal (M2) |
Out |
Low |
8 |
P110 |
Motor drive signal (M1) |
Out |
Low |
9 |
P103 |
Stamp / Clock signal |
Out |
Low |
10 |
P102 |
RAM address signal (A12) / Receipt and Journal feed (FEED) |
Out |
Low |
11 |
P101 |
RAM address signal (A09/A11) / Head drive signal (HD6) |
Out |
Low |
12 |
P100 |
RAM address signal (A08/A10) / Head drive signal (HD5) |
Out |
Low |
13 |
P93 |
RAM address signal (A03/A07) / Head drive signal (HD4) |
Out |
Low |
14 |
P92 |
RAM address signal (A02/A06) / Head drive signal (HD3) |
Out |
Low |
15 |
P91 |
RAM address signal (A01/A05) / Head drive signal (HD2) |
Out |
Low |
16 |
P90 |
RAM address signal (A00/A04) / Head drive signal (HD1) |
Out |
Low |
17 |
SI1/P83 |
Key input signal (Ki7) |
In |
High |
18 |
SO1/P82 |
Key input signal (Ki6) |
In |
High |
19 |
SCK1/P81 |
Key input signal (Ki5) |
In |
High |
20 |
PP0/P80 |
Key input signal (Ki4) |
In |
High |
21 |
KR7/P73 |
Not used |
Out |
- |
22 |
KR6/P72 |
Display segment signal (SG1) |
Out |
Pulse |
23 |
KR5/P71 |
Display segment signal (SF1) |
Out |
Pulse |
24 |
KR4/P70 |
Display segment signal (SE1) |
Out |
Pulse |
25 |
KR3/P63 |
Display segment signal (SD1) |
Out |
Pulse |
26 |
KR2/P62 |
Display segment signal (SC1) |
Out |
Pulse |
27 |
KR1/P61 |
Display segment signal (SB1) |
Out |
Pulse |
28 |
KR0/P60 |
Display segment signal (SA1) |
Out |
Pulse |
29 |
P53 |
Display segment signal (SDP0) |
Out |
Pulse |
30 |
P52 |
Display segment signal (SG0) |
Out |
Pulse |
31 |
P51 |
Display segment signal (SF0) |
Out |
Pulse |
32 |
P50 |
Display segment signal (SE0) |
Out |
Pulse |
33 |
VSS |
GND terminal |
- |
|
34 |
P43 |
Display segment signal (SD0) |
Out |
Pulse |
35 |
P42 |
Display segment signal (SC0) |
Out |
Pulse |
36 |
P41 |
Display segment signal (SB0) |
Out |
Pulse |
37 |
P40 |
Display segment signal (SA0) |
Out |
Pulse |
38 |
P33 |
Display segment coomon signal (Dg4) |
Out |
Pulse |
39 |
P32 |
Display segment coomon signal (Dg3) |
Out |
Pulse |
40 |
P31 |
Display segment coomon signal (Dg2) |
Out |
Pulse |
41 |
P30 |
Display segment coomon signal (Dg1) |
Out |
Pulse |
42 |
P23/BUZ |
Buzzer signal |
Out |
Low |
43 |
P22/PCL |
Motor drive signal (for paper feeding) |
Out |
Low |
44 |
P21 |
Step motor common signal (for print wheel) |
Out |
High |
45 |
P20/PT00 |
Drawer open signal (DW) |
Out |
Low |
46 |
P13/TI0 |
Key input signal (Ki9) |
In |
High |
47 |
P12/INT2 |
Key input signal (Ki8) |
In |
High |
48 |
P11/INT1 |
Power down signal |
In |
Low |
49 |
P10/INT0 |
Reset pulse from printer |
In |
High |
50 |
P03/SI0/SB1 |
Key input signal (Ki3) |
In |
High |
11
Pin No. |
Signal |
Descriptions |
In/Out |
PW-ON |
|
|
|
|
level |
51 |
P02/SO0/SB0 |
Key input signal (Ki2) |
In |
High |
52 |
P01/SCK0_ |
Key input signal (Ki1) |
In |
High |
53 |
P00/INT4 |
Key input signal (Ki0) |
In |
High |
54 |
VSS |
GND terminal |
- |
|
55 |
XT1 |
Sub system clock signal (32.768KHz) |
In |
Pulse |
56 |
XT2 |
Sub system clock signal (32.768KHz) |
In |
Pulse |
57 |
IC |
GND terminal |
- |
|
58 |
X1 |
Main system clock signal (4.19MHz) |
In |
Pulse |
59 |
X2 |
Main system clock signal (4.19MHz) |
In |
Pulse |
60 |
RESET_ |
Initilize signal |
In |
High |
61 |
P143 |
RAM write enable signal (WE_) |
Out |
High |
62 |
P142 |
RAM chip enable signal (CE_) |
Out |
High |
63 |
P141 |
Journal feed common signal |
Out |
Low |
64 |
P140 |
Receipt feed common signal |
Out |
Low |
65 |
P133 |
RAM data signal (D3) |
In/Out |
High |
66 |
P132 |
RAM data signal (D2) |
In/Out |
High |
67 |
P131 |
RAM data signal (D1) |
In/Out |
High |
68 |
P130 |
RAM data signal (D0) |
In/Out |
High |
69 |
P123 |
Key common signal (Kc02) |
Out |
Pulse |
70 |
P122 |
Key common signal (Kc01) |
Out |
Pulse |
71 |
P121 |
Key common signal (Kc00) |
Out |
Pulse |
72 |
P120 |
RAM address signal (A14) |
Out |
Low |
73 |
AVSS |
GND terminal |
- |
|
74 |
P153/AN7 |
Receipt ON/OFF signal |
In |
High |
75 |
P152/AN6 |
Motor error signal |
In |
Low |
76 |
P151/AN5 |
Pad data signal (PAD2) |
In |
High |
77 |
P150/AN4 |
Pad data signal (PAD1) |
In |
High |
78 |
AN3 |
GND terminal |
- |
|
79 |
AN2 |
Battery voltage detection terminal |
In |
0~4.5V |
80 |
AN1 |
Drawer sensor signal |
In |
Low |
Note : The “PW-ON level” is measured under following conditions.
1)Mode switch is REG position.
2)The display is the time.
3)Receipt switch is ON position.
4)PAD1 and Pad2 are both open.
12
6-3. Motor error detection circuit
When the CPU output motor signal, transistor Q8 becomes on and the voltage level at “A” point becomes GND. Then, paper feeding motor rotate. Normally, pin No.1 of IC4 appears low signal. IC4 detects differential voltage between pin No.2 and 3.
In case pin No.3 is higher than No.2, output(Pin No.1) signal is hogh.
If motor happens over load ( Paper jam etc.), over load current (250mA) runs resistor R9. So, “A” point voltage lebel becomes high.
Then IC4 outputs high signal and then CPU knows motor error occured. When the CPU receives “Motor error signal”, CPU stops motor signal.
To Printer
To CPU
6-4. Mode key switch status read
The CPU knows the mode switch status by voltage level of pin No.1. the voltage level is down by resistor. Each voltage is as shown below.
Mode |
REG |
X |
Z |
RF |
OFF |
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Voltage (V |
196 |
3.29 |
4.36 |
0.98 |
0 |
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|
16Kohms |
|
RF
6.2Kohms
REG
To Pin No.1 of CPU
2Kohms
X
560 ohms
Z
13
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