Casio CE-300 (EX-247) User manual

SERVICE MANUAL
ELECTRONIC CASH REGISTER
(without price)
JANUARY 1997
CE-300(EX-247)
Printer Model : MD-910
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3/22/15
Digitized in Heiloo, Holland.

CONTENTS
Page
1. SPECIFICATIONS ................................................................................................ 1
2. INITIALIZE (MAC) OPERATION .......................................................................... 1
3. BLOCK DIAGRAM
3-1. PCB connection ......................................................................................... 2
3-2. Block diagram (circuit) .............................................................................. 3
4. CIRCUIT EXPLANATION
4-1. Power supply circuit.................................................................................. 4
4-2. CPU (uPD78052GC-093-3B9) .................................................................... 5
4-3. Display controller (uPD16312GB-3B4)..................................................... 7
4-4. Initialize IC (Reset circuit) ......................................................................... 8
4-5. Power down detection circuit (PWD) ....................................................... 8
4-6. Address latch circuit ................................................................................. 8
4-7. RAM / ROM bank selection circuit............................................................ 9
4-8. Head drive circuit for printer................................................................... 10
4-9. Vpp sensor circuit.................................................................................... 11
4-10. Power supply circuit for display............................................................. 11
5. DIAGNOSTIC
5-1. To start the diagnostic program............................................................. 12
5-2. Check item................................................................................................ 12
5-3. Operation of each test ............................................................................. 12
5-4. To exit the diagnostic test....................................................................... 17
6. ERROR CODE
6-1. Operation error code ............................................................................... 18
6-2. System lock code..................................................................................... 19
7. IC DATA
1. TC74HC00AP ............................................................................................ 20
2. TC74HC08AP ............................................................................................ 20
3. TC74HC138 ............................................................................................... 20
4. TC74HC367AP .......................................................................................... 21
5. TL431CLPB............................................................................................... 21
6. TC74HC373AP .......................................................................................... 21
7. S-80745 / S-80719..................................................................................... 22
8. M5237L...................................................................................................... 22
9. MAX232 ..................................................................................................... 22
8. PCB LAYOUT ..................................................................................................... 23
9. CIRCUIT DIAGRAMS ......................................................................................... 25
10. PARTS LIST ....................................................................................................... 41
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— 1 —
1. SPECIFICATIONS
Power consumption 120 V 220 V 230 V 240 V
In operation Max. 0.28 A 0.17 A 0.16 A 0.15 A
Stand by 0.14 A 0.09 A 0.08 A 0.07 A
Mode SW OFF Max. 0.12 A 0.08 A 0.07 A 0.06 A
Memory protection Backup battery Mangan Battery
UM-3 ×3 pcs.
Backup period 1 year (25 °C)
Battery life Replace the battery every 1 year.
Memory capacity 32 KB CXK58257AP-70/10L
Clock and calender Accuracy Within ±30 sec. per month (25 °C)
Auto calender Effective until 2099 A.D.
Environment Operating temperature 0 °C~40°C
Operating humidity 10 % ~ 90 %
Storage temperature -25 °C~65°C
Storage humidity 10 % ~ 95 %
Printer Model MD-910-SSC
Print method Dot matrix printing
Print digits 24 digits
MCBF 1,500,000 lines
Ink cassette Life 250,000 characters
Roll paper Type Fine-quality paper or Pressure-sensitive copy paper
Size 57.5 ±0.5 mm
Roll diameter 83 mm or less
2. INITIALIZE (MAC) OPERATION
1. Set the mode switch to “OFF” position.
2. Pressing the “FEED” button and turn the mode switch to “PRG” position.
3. Release the “FEED” button.
4. Press “#2” key (Normally “SUB TOTAL” key).
5. Initialize operation is executed.
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— 2 —
FPC
Mode SW
E266-E3-1
CN3
24P
Main Display
(SH101MA) E278-E2-1
12P10P
Rear Display
(SH1019A) E278-E2-2
4P
Fuse
Transformer
3P CN7
CN6
CN4
2P
17P CN13
CN14
3P CN2
(RS232C)
CN17 CN16
25P
9P
Mangan Battery
(UM-3 ×3)
Winder
Motor
Printer
(MD910SSC)
Drawer
E247-CNB
CORE
2 turn
10P
7P
E247-1
3. BLOCK DIAGRAM
3-1. PCB connection
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— 3 —
MAIN DISPLAY
CUSTOMER DISPLAY SH101MA
SH1019A
Segment & Digit data
uPD16312GB-
3B4 DRWS
Mode
Key
Keyboard
FPC
A8~A15
AD0~AD7
ROM
RAM
A0~A7
CPU
uPD78052GC-093-3B9
MD
WD
Reset circuit
S80719AN
Head drive cuicuit
HD.A~HD.H
PWD detection
RS232C circuit
Printer
MD-910
DI,DO,CLK,STB
KC0~KC4
AD0~AD5
Select addess
3-2. Block diagram (circuit)
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— 4 —
Q1: Power transistor
Q2: Voltage detection transistor
Voltage level at above check point (unit: V )
AB
C
D
Measurement
position ABCD
Voltage (V) 12.5V 5.3V 6.2V 2.47V
4. CIRCUIT EXPLANATION
4-1. Power supply circuit
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— 5 —
Pin No. Signal Description In/Out Status of
Power On Status of Power OFF
1 FB3 Not used — — —
2 FB4 RAM bank 3 Out High High
3 FB5 RAM bank 4 Out High High
4 AVSS GND — GND GND
5 PGM Not used — — —
6 RAM Chip select signal for RAM Out High Low
7 AVREF VDD — 5 V 5 V
8 RXD Receive data In High High
9 TXD Send data Out High High
10 WD Winder motor drive signal Out Low Low
11 DI Data signal from uPD16312 In Pulse High
12 DO Data signal to uPD16312 Out Pulse High
13 CLK Clock signal for uPD16312 Out Pulse High
14 STB Data strobe signal for uPD16312 Out Pulse High
15 KC0 Key common signal (KC0) Out Pulse High
16 KC1 Key common signal (KC1) Out Pulse High
17 KC2 Key common signal (KC2) Out Pulse High
18 KC3 Key common signal (KC3) Out Pulse High
19 AD0 Address / Data signal (AD0) In/Out Pulse High
20 AD1 Address / Data signal (AD1) In/Out Pulse High
21 AD2 Address / Data signal (AD2) In/Out Pulse High
22 AD3 Address / Data signal (AD3) In/Out Pulse High
23 AD4 Address / Data signal (AD4) In/Out Pulse High
24 AD5 Address / Data signal (AD5) In/Out Pulse High
25 AD6 Address / Data signal (AD6) In/Out Pulse High
26 AD7 Address / Data signal (AD7) In/Out Pulse High
27 A8 Address signal (A8) Out Pulse High
28 A9 Address signal (A9) Out Pulse High
29 A10 Address signal (A10) Out Pulse High
30 A11 Address signal (A11) Out Pulse High
31 A12 Address signal (A12) Out Pulse High
32 A13 Address signal (A13) Out Pulse High
33 VSS GND — GND GND
34 A14 Address signal (A14) Out Pulse High
35 A15 Address signal (A15) Out Pulse High
36 INIT PAD2 status — — —
37 VPP PAD1 status — — —
38 DSR Data set ready signal In High High
39 KC4 Key common signal (KC4) Out Pulse High
40 RD Output enable signal of RAM/ROM (RD) Out Pulse High
41 WR Write enable signal of RAM (WR) Out Pulse High
42 RA14 Address signal of ROM (Bank 0) Out High High
43 ASTB Latch enable for Address decoder (ASTB) Out Pulse Low
44 KI12 Key input signal (KI12) In High High
45 KI13 Key input signal (KI13) In High High
46 RA16 Address signal of ROM (Bank2) Out High High
47 RA15 Address signal of ROM (Bank 1) Out High High
48 MD Motor drive signal of printer (MD) Out Low Low
49 DRW Drawer drive signal (DRW) Out Low Low
50 BUZ Buzzer signal (BUZZ) Out Low Low
51 FD Paper feed signal of printer (FD) Out Low Low
52 HD.A Head drive signal of printer (HD.A) Out Low Low
53 HD.B Head drive signal of printer (HD.B) Out Low Low
54 HD.C Head drive signal of printer (HD.C) Out Low Low
55 HD.D Head drive signal of printer (HD.D) Out Low Low
4-2. CPU (uPD78052GC-093-3B9)
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— 6 —
Pin No. Signal Description In/Out Status of
Power On Status of Power OFF
56 HD.E Head drive signal of printer (HD.E) Out Low Low
57 HD.F Head drive signal of printer (HD.F) Out Low Low
58 HD.G Head drive signal of printer (HD.G) Out Low Low
59 HD.H Head drive signal of printer (HD.H) Out Low Low
60 RESET Reset signal (RESET) In High High
61 DP Dot pulse form printer (DP) In Low High
62 RP Reset pulse from printer (RP) In High High
63 OFF Mode key status (OFF) Out High Low
64 PWD Power down signal (PWD) In Low High
65 RB0 Address signal for RAM (Bank 0) Out High High
66 RB1 Address signal for RAM (Bank 1) Out High High
67 RB2 Address signal for RAM (Bank 2) Out High High
68 VDD VDD — 5 V 5 V
69 X2 System clock (5 MHz) In Pulse High
70 X1 System clock (5 MHz) In Pulse High
71 IC GND — GND GND
72 XT2 Sub system clock (32.768 KHz) In Pulse Pulse
73 XT1 Sub system clock (32.768 KHz) In Pulse Pulse
74 AVDD VDD — 5 V 5 V
75 AVREF0 VCC — GND GND
76 BAT Low battery signal In High High
77 VPP.S VPP detection signal (VPP.S) In Low Low
78 FB0 Address signal of Fiscal ROM bank 0 Out High High
79 FB1 Address signal of Fiscal ROM bank 1 Out High High
80 FB2 Address signal of Fiscal ROM bank 2 Out High High
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— 7 —
Pin No. Signal Description In/Out Status of
Power On Status of Power OFF
1 SW1 Not used (GND) — GND GND
2 SW2 Not used (GND) — GND GND
3 SW3 Not used (GND) — GND GND
4 SW4 Not used (GND) — GND GND
5 DOUT Data out signal to CPU Out High High
6 DIN Data in signal from CPU In Pulse High
7 VSS GND — GND GND
8 CLK Clock signal (CLK) In Pulse High
9 STB Data strobe signal (STB) In Pulse High
10 KEY1 Not used — — —
11 KEY2 Not used — — —
12 KEY3 Drawer sensor signal (DRW.S) In High High
13 KEY4 VCC — 5 V 5 V
14 VDD VCC — 5 V 5 V
15 SEG1 Display segment signal (Sa) Out Pulse Low
16 SEG2 Display segment signal (Sb) Out Pulse Low
17 SEG3 Display segment signal (Sc) Out Pulse Low
18 SEG4 Display segment signal (Sd) Out Pulse Low
19 SEG5 Display segment signal (Se) Out Pulse Low
20 SEG6 Display segment signal (Sf) Out Pulse Low
21 SEG7 Display segment signal (Sg) Out Pulse Low
22 SEG8 Display segment signal (Sdp) Out Pulse Low
23 SEG9 Display segment signal (Str) Out Pulse Low
24 SEG10 Display segment common signal (Scom) Out Pulse Low
25 SEG11 Not used Low Low
26 SEG12 Not used Low Low
27 VEE Power for display (-VN) — -32 V -32 V
28 GRD10 Display digit signal (G10) Out Pulse Low
29 GRD9 Display digit signal (G9) Out Pulse Low
30 GRD8 Display digit signal (G8) Out Pulse Low
31 GRD7 Display digit signal (G7) Out Pulse Low
32 GRD6 Display digit signal (G6) Out Pulse Low
33 GRD5 Display digit signal (G5) Out Pulse Low
34 GRD4 Display digit signal (G4) Out Pulse Low
35 GRD3 Display digit signal (G3) Out Pulse Low
36 GRD2 Display digit signal (G2) Out Pulse Low
37 GRD1 Display digit signal (G1) Out Pulse Low
38 VDD VCC — 5 V 5 V
39 LED4 Not used — Pulse Low
40 LED3 Not used — Pulse Low
41 LED2 Not used — Pulse Low
42 LED1 Not used — Pulse Low
43 VSS GND — GND GND
44 OSC System clock (500 KHz) In Pulse Pulse
4-3. Display controller (uPD16312GB-3B4)
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— 8 —
4-4. Initilize IC (Reset circuit)
VDD: Voltage of memory protection battery
To Pin No.60 of CPU
When the voltage level at Pin No.60 of CPU is not stabilized, CPU does not work properly in rare case.
Therefore, this machine uses the initialize IC for stabilizing the voltage.
Even the voltage level of VDD (Pin No.2) is changed, Pin No.1 of initilize IC outputs stabilized 5 volts.
When the VDD voltage become less than 1.9 V, the initialize IC send a reset signal to CPU.
4-5. Power down detection circuit (PWD)
To Pin No.64 of CPU
When the VP voltage become less than 4.8 V, the pin No.1 of IC5 become “Low” level.
Then,the transistor Q44 become OFF.
When Q44 become OFF, the voltage lebel of pin No.64 of CPU changes to “High” level from “Low”. Then,
CPU knows power failure.
4-6. Address latch circuit
CPU uses 8 port (AD0 ~ AD7) for address bus and
data bus.
To select the address, CPU use the IC13.
CPU send the address to IC13, and send ASTB
signal at same time.
Then, IC13 store the address and output the
address immediately.
In this way, CPU select the address and data
signal.
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— 9 —
4-7. RAM / ROM bank selection circuit
This circuit is used for address decoder for memory.
Memory Map
C000
A000
8000
6000
4000
2000
0000
RAM BANK select
area (4 K)
E000
RAM common area
(8 K)
EP ROM
Common (16 K)
Mask ROM
(16 K)
F800
Internal RAM
(High speed access)
288 bytes
Internal RAM
(High speed access)
Short direct area
192 bytes
FE20
FFFF
FA80
Internal RAM
(High speed access)
Outer I/O area
F000 General purpose
register 32 bytes
Special function
register (SFR)
256 bytes
FEE0
FFF0
Bank
0 Bank 5
Bank
4
Bank
2
Bank
1 Bank 3
EP ROM
Bank select area
(16 K) FAE0
FD00
Buffer RAM 32 bytes FAC0
KI signal port (F800,F801)
0000000000100010 00011 00100 00101 00110
Bank
29
11101
RAM 256 K RAM 1 M
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— 10 —
4-8. Head drive circuit for printer
Motor drive circuit
Normally, the transistor of motor drive circuit is followng condition.
TR1, TR2, TR5 : OFF
TR3, TR4 : ON
MD (-) signal : VP level
When the CPU want to rotate the motor, CPU change the MD signal to “High” from “Low”.
Then, TR1, TR2 and TR5 are become ON and MD (-) signal is become GND level,
and then motor is rotated.
Head drive circuit
When the CPU wants to print, CPU send “High” signal from HD.A ~ HD.H terminal.
This signal goes to printer unit, and then print.
RP: Reset pulse from printer
DP: Dot pulse from printer
TR1
TR2
TR4 TR3
TR5
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— 11 —
4-9. VPP sensor circuit
Protection circuit
To prevent the circuit breakage, the protection circuit watches the voltage level of VCC, VDD and VPP.
When the each voltage level is more than following condition, this circuit cuts the voltage.
VCC,VDD: In case these voltages are become over voltage, this circuit outputs “SCR”
signal(High signal) and burn out the fuse.
VPP: In case the VPP voltage is more than 15 V or less than 13.9 V, the “VPP.S” level
is inverted and CPU cut the “VPP.ON” signal.
Detection voltage level (Unit: V)
VCC >= +6.5 V
VDD >= +6.5 V
+13.9 V =< VPP <=15.0 V
4-10. Power supply circuit for display
This circuit is making the power for display tube.
Voltage level: -VN Est. -31.2 V
VF1 - VF2 Est. AC4.85 V
GNDVP
VC
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— 12 —
5. DIAGNOSTIC
5-1. To start the diagnostic program
1. Set the mode switch to “OFF” position.
2. Pressing the “FEED” button and turn the mode switch to “PRG” position.
3. Release the “FEED” button.
4. Input “9999900000” and press “ST” (“#2” key).
5. Diagnostic program is executed.
5-2. Check item
The following test can be checked in the diagnostic test.
1. Key code test
2. Switch status test
3. Individul function test.
5-3. Operation of each test
1. Key code test
When pressing a key, the machine displays
the following key code.
HARD KEY CODE TABLE
Hard key code
0 1 3
DISPLAY
“020” & “026” buttons are work for “#2” key.
FEED 055 051 789046 040 034 028 022 016
058 054 050 456045 039 033 027 021 015
057 053 049 123044 038 032 026 020 014
056 052 C0011 012 043 037 031 025 019 013
047 041 035 029 023 017
048 042 036 030 024 018
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— 13 —
2. Switch status test
Press “C” button, the switch status is appeared on the display.
No display
No display
[DISPLAY]
No display
No display
Low battery
L: Low battery
Nil: Battery OK
PAD2 status
1: Short
0: Open
PAD1 status
1: Short
0: Open
Always: 1
Drawer sensor
1: Close
0: Open
Mode switch status
1: PGM
2: RF
3: REG
4: CAL
5: X
6: Z
No display: OFF
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— 14 —
3. Individual function test
3-1. Series test
“Y” “X” “1” + “#2” key
Y: 0: Normal test
1: Execute next test even if an error happend at ROM check sum
X: 0: Autockecking of RAM capacity
1: 256 Kbit RAM test
2: 1 Mbit RAM test
Execute the following test in order.
1. Display test
2. Check sum test of EP-ROM
3. RAM test
4. Drawer open test
5. Printing test
6. Date and Time test
1. Display test (All segment light on)
2. Ckeck sum test of EP-ROM
Normal end Error end
XX00: Check sum value XXXX : Check sum value
3. RAM test (Read/Write test)
Normal end receipt
256 Kbit RAM 1 Mbit RAM
Error end receipt
YY: Bank
XXXX: Address
4. Drawer open test
5. Printing test
6. Date and Time test
Set the date and time as follows.
Date : 31 / 12 / 96 Time : 25:59
Then, issues a receipt and display the following character.
ROM E R
ROM SUM OK
RAM 128K R/W OKRAM 32K R/W OK
RAM 32K E R
BBBBBBBBBBBBBBBBBBBBBBBB
12. 3 4 5. 6 7 8. 9 0
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— 15 —
3-2. Print test
Input “Y” “X” “2” + “#2” key.
X: 0: Print the following character continuously.
Printing speed : 45 times / Min.
1: Print the following character, open the drawer and issue a receipt
Printing speed : 25 times / Min.
Drawer open : 5 times / Min.
Receipt issue : 5 times / Min.
Y: 0: No effect
1: Print the following character without waiting time. ( Continuously print )
To stop this test, press any key or turn the mode switch to “OFF” position.
Printing sample:
3-3. RAM read only test
Input “X” “5” + “#2” key.
X: 0: Read the data from start to end address and issues receipt.
1: Read the data from start to end address continuously until power off.
Brink " - " signal on the display during checking.
Note: Be sure to execute the series test ( 1 + #2 ) before this test.
256 Kbit check receipt 1 Mbit check receipt
Display
3-4. INIT OPERATION (To set a Factory Default setting)
Input “8” “6” + “#2” key.
The machine is executed a INIT operation according to PAD status.
Set the data and time to “0”.
(00-00-00, 00:00:00)
3-5. Voltage check for Memory protection battery
Input “7” + “#2” key.
Display the battery voltage.
To stop this test, press any key or turn the mode switch to “OFF” position.
BBBBBBBBBBBB
RAM 128K READ OKRAM 32K READ OK
XXX
X.XX: Voltage value
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— 16 —
3-6. All character print test
Input “8” + “#2” key.
“8” + “#2”: Pirnts all character on receipt once.
“1” “8” + “#2”: Prints all character on receipt continuously.
To stop this test, press any key or turn the mode switch to “OFF” position.
2 3 - 5 9 0 0
3-7. Time display test
Input “9” + “#2” key.
Display the time.
To stop this test, press any key or turn the mode switch to “OFF” position.
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— 17 —
3-8. RS232C port test
Input “2” “0” “7” + “#2” key.
Execute the RS232C loop back test continuously using loop back connector.
In case an error happens, the machine issues an error receipt then stop this test.
Test description: 1: Level check at DSR signal ( Low/High)
2: Send the data (05Ah) from TxD and receive it at RxD terminal.
To stop this test, turn the mode switch to “OFF” position.
Loop back connection:
TxD 2
RxD 3
DSR 6
Normal End Error End
X: Error code
0: Time over
1: Over run error
2: Framing error
3: RXD line data error
4: DSR line receive error
5-4. To exit the diagnostic test
To escape the diagnostic test mode, execute “INITIALIZE (MAC) operation”.
232C ER X
232C OK
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— 18 —
6. ERROR CODE
6-1. Operation error code
Error codes appear on display whenever you make a mistake during operation.
Error Code
E01
E08
E27
E31
E33
E35
E38
E94
Meaning
Mode switch position changed before finalization.
Registration without entering a clerk number. This
error appears only when the clerk control function
is activated.
Transaction cancel buffer full.
Finalization of a transaction attempted without
confirming the subtotal.
Finalize operation attempted without entering
amount tender.
Change amount over.
Read/reset operation without declaring cash in
drawer. This error appears only when this function
is activated.
Printer error.
Action
Return the mode switch to its original
setting and finalize the operation.
Enter a clerk number.
Finalize the transaction.
Press the
SUB
TOTAL
key.
Enter the amount tendered.
Require small money.
Perform money declaration.
Turn the power off, and remove jammed
paper from the printer.
Press
C
C/AC
key and check the appropriate section of this manual for the operation you want to perform.
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