Casio 120CR Manual de usuario
SERVICE MANUAL
ELECTRONIC CASH REGISTER
(without price)
Printer Model : M-42V
120CR(EX-268B)
160CR(EX-268B)
SEP. 2000
INDEX
CONTENTS
120CR
160CR Page
1. SPECIFICATIONS........................................................................................ 1
2. INITIALIZE (MAC) OPERATION.................................................................. 2
3. BLOCK DIAGRAM....................................................................................... 3
3-1. PCB CONNECTION..................................................................................................... 3
3-1. BLOCK DIAGRAM....................................................................................................... 4
4. DISASSEMBLY............................................................................................ 5
5. CIRCUIT EXPLANATION ............................................................................ 8
5-1. Power supply circuit .................................................................................................. 8
5-2. Reset circuit ................................................................................................................ 9
5-3. Data communication between CPU and EEPROM ................................................ 10
5-4. Printer drive circuit................................................................................................... 12
5-5. Pin description (CPU uPD78043FGF) ..................................................................... 12
6. DIAGNOSTIC OPERATIONS .................................................................... 14
6-1. To start the diagnostic operation............................................................................ 14
6-2. Check items .............................................................................................................. 14
6-3. Operations................................................................................................................. 15
7. ERROR CODE LIST................................................................................... 19
7-1. Operation error code................................................................................................ 19
8. IC DATA ..................................................................................................... 20
9. PCB LAYOUT ............................................................................................ 21
10. CIRCUIT DIAGRAM ................................................................................... 22
11. PARTS LIST............................................................................................... 29
— 1 —
• CPU Name µPD78043FGF076-3B9
Number of control bit 8bit
RAM (Built-in) 624 Kbits
• ROM Name BR93LC46A
Capacity 1024 bits
• Printer Name M-42V-009-040
Print method Print wheel selecting type serial printer
MCBF 700,000 lines
Life
• Roll paper Type Fine-quality paper
Size Width 57.5 ±0.5 mm
Roll diameter 80 mm or less
1. SPECIFICATIONS
1-1. Electrical specifications
120 V 220 V 230 V 240 V
• Power consumption In operation Max. 0.11 A 0.05 A 0.06 A 0.06 A
Min. 0.07 A 0.04 A 0.05 A 0.05 A
Power OFF 0.06 A 0.03 A 0.04 A 0.04 A
• Memory protection Back-up battery Mangan Battery (UM-3 ×3 pcs)
Back-up period 1 year (25 °C)
Battery life Replace the battery every 1 years.
• Clock & Calendar Accuracy Within ±30 sec. per month
Auto calendar Effective until 2099 A.D.
1-2. Environmental specifications
• Operating temperature 0 °C ~ 40 °C
• Operating humidity 10 % ~ 90 %
• Storage temperature -25 °C ~ 65 °C
• Storage humidity 10 % ~ 95 %
• Vibration strength 1.5 G (The machine must be in the carton box)
1-3. Main components
— 2 —
DEVICE NAME MODEL NOTE
• Wet cover WT-80
• INK ROLL IR-40
1-5. Option List
1-4. Drawer List
DRAWER NAME Specification NOTE
• DL-1838 (S type) Europe, UK, Germany, Other countries
• DL-2768 (M type) Europe, UK, Other countries
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the manufacturer.
Dispose of used batteries according
to the manufacture’s instructions.
VORSICHT !
Explosionsgefahr bei unsachgemäßem Austausch der Batterie.
Ersatz nur durch denselben oder einen vom
Hersteller empfohlenen gleichwertigen Typ.
Entsorgung gebrauchter Batterien nach
Angaben des Herstellers.
ADVARSEL !
Lithiumbatteri - Eksplosionsfare ved fejlagtig hándtering.
Udskiftning má kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandØren.
2. INITIALIZE (MAC) 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.
— 3 —
3. BLOCK DIAGRAM
3-1. PCB CONNECTION
E266-1
— 4 —
4.19MHz 32.768
KHz
RESET IC
Winder
Motor
Drawer
DI,DO
CE ,SK
BUZZ
LB
X2
X1
Sa~Sg,G1~G9
KC 0~3
DRW
WMO
RP,PT,Pt
PMO,PHD
KI 0~7
E266-1 PCB
Printer
Keyboard Mode
Key
Operator
Display
Customer
Display
EEPROM
Buzzer
CPU
Memory Protection
battery Voltage
COM,PGM,
RF,OFF,REG,
CAL,X,Z
3-2. BLOCK DIAGRAM
— 5 —
4. DISASSEMBLY
1. Open the printer cover.
2. Remove the screw from the upper case.
4. Lift up the upper case.
3. Slide the upper case towards front side.
Remove the screw.
— 6 —
5. Open upper case by lifting it from the left side.
6. Remove all the cables on Main PCB and remove 3
screws.
Remove 3 screws.
Hook Hook
Push the connector.
Pull the wires.
7. Lift up the Main PCB to the right side to avoid the
destruction of Display tube.
Be careful not to damage the point A.
Point A
— 7 —
7. To remove the Printer unit, release the hook of point
B, then lift up the Printer unit.
Point B
— 8 —
5. CIRCUIT EXPLANATION
5-1. Power supply circuit
1. Plug the power cord into AC outret. The secondary voltage(9.65VAC) will be appeared at the
power transformer T1.("A" point)
2. Then, its AC voltage is rectified by the diode bridge and change it to DC voltage.("B" point)
3. The power transistor 2SD2396 is turned on when the voltage of its corrector becomes more than
7V. Then VP is supplied.("C" point)
4. When the VP voltage becomes more than 4V, the transistor 2SC945 is turned on. Then PWD
signal becomes "L" level.("F" point)
When the PWD signal becomes "L" 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.
A B
DE F
C
G
H
I
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