Casio 110CR User manual

ELECTRONIC CASH REGISTER
(with price)
SERVICE MANUAL
110CR/PCR250 (EX-266)
150CR (EX-267)
JAN. 1995
Printer Model : M42V
INDEX

-CONTENTS
Page
1.FEATURES ...................................................................................1
2.SPECIFICATIONS ...................................................................................1
3.OPTION ...................................................................................2
4.MAC OPERATION ...................................................................................2
5.BLOCK DIAGRAM ...................................................................................3
6.CIRCUIT EXPLANATIONS.............................................................................4
6-1. Power supply circuit .................................................................................4
6-2. Reset circuit ...................................................................................5
6-3. Data communication between CPU and EEPROM .................................6
6-4. Printer drive circuit ...................................................................................8
6-5. Pin description ...................................................................................9
7.DISASSEMBLY .................................................................................10
7-1. To open the upper case.........................................................................10
7-2. To remove the Main PCB.......................................................................10
7-3. To remove the keyboard ass'y...............................................................10
8. DIAGNOSTOC OPERATIONS ....................................................................11
9. IC DATA .................................................................................16
9-1. LB1268 .................................................................................16
9-2. S-80728AN-Z .................................................................................16
10.CIRCUIT DIAGRAM .................................................................................17
11.PCB LAYOUT .................................................................................28
12. PARTS LIST .................................................................................29

- 1 -
1. FEATURES
2. SPECIFICATIONS
110CR/PCR-250
100V 120V 220V 230/240V
Power consumption In operation Max. 4.5W 0.08A 0.09A 0.04A 0.05A
Stand-by - 0.05A 0.06A 0.03A 0.04A
Mode SW OFF - 0.04A 0.05A 0.02A 0.03A
Memory protection Backup battery Mangan battery UM-3 x 3 pcs. (25°C)
Backup period 1 year (25°C)
Battery life Replace every 1 year
Clock and calender Accuracy Within ±30 sec. per month
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 M-42V
Print method Print wheel selecting type serial printer
Print digits 12 digits (Amount 10 digits : Symbol 2 digits)
MCBF 700,000 lines
Ink roller Model IR-40 (Purple)
Life 1,000,000 characters
Roll paper Type Fine-quarity paper
Size 57.5±0.5 mm
Roll diameter 80 mm or less
Drawer S drawer (Coin 5/Bill 4) DL-1313 ( for U.S.A.)
S drawer (Coin 5/Bill 3) DL-1817 (for except U.S.A.)
M drawer (Coin 5/Bill 4) DL-2439 (for Europe, Other countries)
M drawer (Coin 8/Bill 4) DL-2749 (for Europe,U.K. and Other countries)
Function 110CR PCR-250 150CR 150CR
(U.S.A.,Canada)
Depertment number 4 8 4 8
PLU function Nil 16 Nil 16
Customer display Nil Nil Effective Effective
PRG data back up function Effective Nil Effective Nil
Calculator function Effective Effective Effective Effective

- 2 -
150CR
3. OPTIONS (110CR/PCR-250/150CR)
• Wet cover WT-69
4. MAC OPERATION (Memory All Clear operation)
1. Set the Mode Switch to OFF.
2. Plug the power cord of the ECR off an AC outlet.
3. Remove the memory protection batteries.
4. Leave the ECR a few minutes and plug the power cord into an AC outlet.
5. Set the memory protection batteries.
6. Turn the Mode Switch to REG position.
120V 220V 230/240V
Power consumption In operation Max. 0.11A 0.05A 0.06A
Stand-by 0.07A 0.04A 0.05A
Mode SW OFF 0.06A 0.03A 0.04A
Memory protection Same as 110CR
Clock and calender Same as 110CR
Environment Same as 110CR
Printer Same as 110CR
Ink roller Same as 110CR
Roll paper Same as 110CR
Drawer S drawer (Coin 5/ Bill 4) DL-1313 (for U.S.A.)
S drawer (Coin 5/Bill 3) DL-1817 (for Europe,U.K.,
germany,Other countries)
M drawer (Coin 5/Bill 4) DL-2439 (for Europe,
Canada, Other countries)
M drawer (Coin 8/Bill 4) DL-2749 (for Europe,U.K.,
Other countries)

- 3 -
5. BLOCK DIAGRAM
CPU
DISPLAY
EEPROM
Reset IC
Buzzer
Winder Motor drive circuit
Printer drive circuit
Drawer drive circuit
Voltage detection
KEYBOARD

- 4 -
6. CIRCUIT EXPLANATION
6-1. Power supply circuit
1. Plug the power cord into AC outlet, secondary voltage (9.65VAC) of the power transformer T1
will be appears at "A" point.
2. Then, its AC voltage is rectified by the diode bridge and change it to DC voltage.("B" point)
3. DC voltage appears more than 7V at the corrector of power transistor 2SD2396, and then
the power transistor is turned on.
Then VP is supplied. ("C" point)
4. When the VP voltage becomes more than 3.3V, the transistor 2SD945 is turned on and then
PWD signal becomes GND level. ("F" point)
When the PWD signal becomes GND level, CPU knows no power failure.
5. VP is supplied at the DC DC converter trans T2, the DC DC converter makes display and logic
circuit voltage.
VN ,VF1,VF2 : Display voltage ("I", "J" point )
VDD : Logic circuit voltage ("H" point)
Transistor 2SD1803 is used for oscillating the primary voltage of DC DC converter trans.
AB
C
D E F
H
G
I

- 5 -
Voltage level is measured at the following condition.
1. Plug the power cord in AC outlet.
2. Mode switch position : REG, display 0.00
3. Put in the memory protection batteries.
4. Plug out : Plug out the power cord , the memory protection batteries in.
6-2. Reset circuit
When the voltage level at the pin no.17 of CPU is
not stable, CPU does not work properly.
To make a stable voltage, the reset IC(S-80728AN)
is used for this circuit.
In case the voltage level of VDD becomes down
output terminof reset IC is out the stable voltage.
A
BGND
E
F
C
I
DG
H
ABC D E F G H I
Power ON 9.65 VAC 10.52V 5.76V 10.45V 0.78V 0.12V Pulse 5.07V -23.9V
Plug out 000 0 0 4.13V 0 4.30V 0
RESET Pin No.17
VDD
GND
S-80728AN

- 6 -
6-3. Data communication between CPU and EEPROM
CS : Chip enable
SK : Sirial data clock
DI : Serial data input
DO : Serial data outpu
EEPROM is a memory to possible write/erase by electricity .
The BR93LC46A privides efficient nonvolatile read/write memory arranged as 64 registers of 16
bits each.
(64 words X 16 bits = 1024 bits)
[Block diagram]
Command code
controller
Clock generator
Power detection
Write
protection High voltage
genarator
Address
decorder
R/W
amplifier
Address
buffer
Data
register
Dammy bit
Command
register
1024 bit
EEPROM array
SK
CS
DI
DO
6 bits
6 bits
16 bits
16 bits
1
2
3
4
CS
SK
DI
DO
Pin No.23
Pin No.14
Pin No.15
Pin No.16
EEPROMCPU
BR93LC46A

- 7 -
[Data reading procedure]
When the CPU read the dara of EEPROM, CPU send the CS signal and SK signal to EEPROM.
Then, CPU send the address to EEPROM, and then EEPROM send the data to CPU.
[Data writing procedure]
When the CPU save the data to EEPROM, CPU sends the CS and SK signal to EEPROM.
And CPU send the address and data to EEPROM from pin No.15.
When the EEPROM writes the data , EEPROM outputs the busy signal from DO terminal to CPU.
After finish writing, EEPROM outputs the ready signal from DO terminal to CPU.
CS
SK
DI
DO
Address
Data
Output data here
CS
SK
DI
DO
Address Data
High Impedance BUSY(L)
READY(H)
Status

- 8 -
6-4. Printer drive circuit
When the CPU start printing, CPU send MD signal to rotate motor unit.
Then the printer send back the RP(reset pulse),PT and PT (Timing pulse) to CPU.
After CPU receive RP,PT andPT, CPU knows the position of printin wheel.
And then, CPU send HD signal to operate the printing magnet when the character selected.
The CPU counts the TP signal to select the character.
6-5. Pin description (CPU uPD78042AGF)
CPU
Pin No.44
Pin No.45
Pin No.47
Pin No.62
Pin No.63
RP
Pt
PT
MD
HD
Printer M42
Pin No. Signal In/Out Mode SW
REG Mode SW OFF AC cord Plug off Description
1 P94/FIP6 Out Pulse -24V L Display digit signal DG7
2 P93/FIP5 Out Pulse -24V L Display digit signal DG6
3 P92/FIP4 Out Pulse -24V L Display digit signal DG5
4 P91/FIP3 Out Pulse -24V L Display digit signal DG4
5 P90/FIP2 Out Pulse -24V L Display digit signal DG3
6 P81/FIP1 Out Pulse -24V L Display digit signal DG2
7 P80/FIP0 Out Pulse -24V L Display digit signal DG1
8 VDD - +5V +5V +5V VDD terminal
9 P27/SCK0 In/Out - - - Not used
10 P26/SO0/SB1 In/Out - - - Not used
11 P25/SI0/SB0 In/Out - - - Not used
12 P24/BUSY In/Out - - - Not used
13 P23/STB Out H H H Strobe signal for AVREF
14 P22/SCK1 Out L H H SK signal for EEPROM
15 P21/SO1 Out L H H DI signal for EEPROM
16 P20/SI1 In H H H DO signal for EEPROM
17 RESET In H H H Reset signal
18 P74 Out H H L Drawer open signal
19 P73 Out L H H Common signal for PAD condition
20 AVSS - GND GND GND GND for AD converter
21 P17/ANI7 In GND GND GND GND
22 P16/ANI6 In GND GND GND GND
23 P15/ANI5 Out L L H Chip enable signal for EEPROM
24 P14/ANI4 In GND GND GND GND
25 P13/ANI3 In GND GND GND GND
26 P12/ANI2 In GND GND GND GND
27 P11/ANI1 In GND GND GND GND
28 P10/ANI0 In H H H Low battery detection terminal
29 AVDD - H H H Power for AD converter
30 AVREF In L L L Voltage for AD converter (VDD)
31 XT1 In Pulse Pulse Pulse Sub system clock
32 XT2 - Pulse Pulse Pulse Sub system clock
33 VSS - GND GND GND GND
34 X1 In Pulse L L Main system clock
35 X2 - Pulse H H Main system clock
36 P37 In L L L Mode switch position (OFF)
37 P36/BUZ Out L L L Buzzer signal
38 P35/PCL In L L L Mode switch position (Z)
39 P34/T12 In L L L Mode switch position (X)
40 P33/T11 In L L L Mode switch position (CAL)