Casio PCR-260B User manual

SERVICE MANUAL
ELECTRONIC CASH REGISTER
(without price)
Printer Model : M-42V
PCR-260B(EX-268EC)
MAR. 2003
INDEX

CONTENTS
PCR260B Page
1. SPECIFICATIONS........................................................................................ 1
2. INITIALIZE (MAC) OPERATION.................................................................. 2
3. BLOCK DIAGRAM....................................................................................... 3
3-1. PCB CONNECTION..................................................................................................... 3
3-2. BLOCK DIAGRAM....................................................................................................... 4
4. DISASSEMBLY............................................................................................ 5
5. CIRCUIT EXPLANATION ............................................................................ 8
5-1. Power supply circuit .................................................................................................. 8
5-2. Reset circuit ................................................................................................................ 9
5-4. Printer drive circuit................................................................................................... 10
5-5. Pin description (CPU uPD78044FGF) ..................................................................... 10
6. DIAGNOSTIC OPERATIONS .................................................................... 12
6-1. To start the diagnostic operation............................................................................ 12
6-2. Check items .............................................................................................................. 12
6-3. Operations................................................................................................................. 13
7. ERROR CODE LIST................................................................................... 16
7-1. Operation error code................................................................................................ 16
8. IC DATA ..................................................................................................... 17
9. PCB LAYOUT ............................................................................................ 18
10. CIRCUIT DIAGRAM ................................................................................... 19
11. PARTS LIST............................................................................................... 25

— 1 —
• CPU Name µPD78044FGF177-3B9
Number of control bit 8bit
RAM (Built-in) 624 Kbits
• Printer Name M-42V-001-060MA
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
120V
• Power consumption In operation Max. 0.11 A
Min. 0.09 A
Power OFF 0.06 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-1325 (S type) D-14C2M-D54RP-9* USA
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

— 4 —
Voltage detection
Winder Motor drive circuit
Printer drive circuit
Drawer drive circuit
Reset IC
Buzzer
KEYBOARD
DISPLAY
CPU
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 —
8. To remove the Printer unit, release the hook of point
B, then lift up the Printer unit.
Point B

— 8 —
CN8
*B, *D, *G
E412181*1
T1
TE-266-E2U
FUSE 1A
6
10 F1
C1 HE12TKYB103K
1SR35-100A X 4
D1
D2
D3
D4
C3
WITH HEATSINK
OSH-1625-MP
Q1 2SD2396(K)
25V4700uF C8
HE60TKYB222K
R1 1K
ZD1
RD6. 8EB1
C7
10V100uF
R16
560 R17
150
HE60TKYB222K
C9
ZD5
RD3. 3EB2 VDD
R14
470K
Q7
2SC945 C23
ECQ-B1H103-KF
C28
DSTC50TKYR103K
CRH100-FH11J-1R0
1S2075K RD24EB2
R3
D6 ZD3 1S2075K
2SD1803(T)
8
9
10V100µ
50V4. 7uF
D5 C4
C11 C17
HE12TKYB103K
C6 HE50TKYB102K
ZD2
RD36EB1
Q2
R4 750
R6 24K
C5
HE12TKYB
103K
R5
100
1
2
7
3
4
5ZD4
RD4. 3EB2
D7
1S2471
T2
DCS-267
VF1
VF2
VN
VDD
VDW
VP
PWD
GND
GNDP
I
G
H
DE
A
B
C
F
5. CIRCUIT EXPLANATIONS
5-1. 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.