Casio PCR-260B, EX-268EC, M-42V Service Manual

SERVICE MANUAL

INDEX

(without price)

ELECTRONIC CASH REGISTER

PCR-260B (EX-268EC)

MAR. 2003

Printer Model : M-42V

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. SPECIFICATIONS

1-1. Electrical specifications

• Power consumption In operation Max. 0.11 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 %

120V

Min. 0.09 A

• 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

• 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 —

1-4. Drawer List

DRAWER NAME Specification NOTE

• DL-1325 (S type) D-14C2M-D54RP-9* USA

1-5. Option List

DEVICE NAME MODEL NOTE

• Wet cover WT-80

• INK ROLL IR-40

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.

— 2 —

3. BLOCK DIAGRAM

3-1. PCB CONNECTION

— 3 —

3-2. BLOCK DIAGRAM

Voltage detection

Buzzer

Winder Motor drive circuit

Printer drive circuit

Drawer drive circuit

Reset IC

DISPLAY

CPU

KEYBOARD

— 4 —

4. DISASSEMBLY

1. Open the printer cover.

2. Remove the screw from the upper case.

Remove the screw.

3. Slide the upper case towards front side.

4. Lift up the upper case.

— 5 —

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

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.

Hook

Point A

— 6 —

8. To remove the Printer unit, release the hook of point
B, then lift up the Printer unit.

Point B

— 7 —

5. CIRCUIT EXPLANATIONS

5-1. Power supply circuit

E412181*1

CN8

*B, *D, *G

T1
TE-266-E2U

6

10

FUSE 1A

F1

A

C1

HE12TKYB103K

1SR35-100A X 4

D1

D2

D3
D4

G

C6

HE50TKYB102K

Q2

ZD2

RD36EB1

2SD1803(T)

WITH HEATSINK
OSH-1625-MP

Q1 2SD2396(K)

ZD5

C3

25V4700uF

C8

R1 1K

HE60TKYB222K

C9

HE60TKYB222K

ZD1

RD6. 8EB1

C7

10V100uF

RD3. 3EB2

150

R17

Q7

560

R16

2SC945

B

D

R4

750

R5

100

C5
HE12TKYB

103K

D6 ZD3

1S2075K RD24EB2

R3

CRH100-FH11J-1R0

C

E

T2
DCS-267
1

3
4

2

5
RD4. 3EB2

D7

7

1S2471

50V4. 7uF
8

10V100µ

D5

9

1S2075K

VDD

R14
470K

C23
ECQ-B1H103-KF

F

ZD4

C11

C4

R6

24K

C17

HE12TKYB103K

H

C28
DSTC50TKYR103K

VF1

VF2

VN

I

VDD

VDW

VP

PWD

GND

GNDP

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.

— 8 —

D

AC IN
GND

A

1A

125V

F1

B

CN8

1

5

6

D1

D2D3D4

C1

B-2

C2

41

VF2

C14

C16

CMK-P2X

E266-1

AC IN

7

HOT

1

R1

B

Q1

B-1

C6

Q2

E

B

D6
R4

10

C3

B-3

C-2

C-3

C15

D-3

F-1

F-2

C17

C-13

C-14

C-12

C26

21

C28

C29

A

C5

T1

D5

C4

R5

T2

20

CN3

D-1

B-4

C-5

C-6

C-7

C-8

C-4

C-3

µPD78042AGF

F-5

IC4
LBI268

A-1

A-2

C30

E

C-15
C-16
C-17
C-18
C-19
C-20

L1

B-5

B-6

B-7

B-9

F-3

F-4

B-15

ZD2

DISP1

Q5

X1

B-10

C-9

X2

R18

E

C7

B

C-10

C18

R20

R19

C8

C10

CN1

1

C11

R6

C-1

ZD3

E-1

D9

B-8

3

IC2

R11

1

R13

B-11

C23

EB

Q7

B-12

C24

B-13

R21

C9

2

E

Q4

ZD4

D7

VN

R10

BR93LC46A

E-2

R12

C21

R16

C25

R22

R23

ZD1

R2

R3

Q3

E

B

R7

C12

D8

B

CN2

R9

R8

2

CN4

C13

C19

IC1

VDD

C22

GND

C26

F-6

C20

S-80728AN

R14

C-23

A-3

A-4

41

VF1
1

D-2

BZ1

Q6

E

B

R15

VP

C-11
ZD5

R17

C-21
C-22

C27

B-14

L2

C31

CN7

8

C
G

21

I

CN5

H
GND

E

1

F

A BC

Power ON

Plug out

9.65 VAC

10.52V

5.76V

000

10.45V

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.

5-2. Reset circuit

VDD

S-80728AN

GND

RESET

Pin No.17

DE

0.78V

00

F

0.12V

4.13V

GH I

Pulse

0

5.07V

4.30V

-23.9V

0

CPU does not work properly when the VDD is unstable.
The reset IC,S-80728AN, is used to know if the VDD is
stable or not. When the VDD voltage becomes 2.8V or
more, the output of the reset IC becomes "H" level.

— 9 —

g

p

)

5-3. Printer drive circuit

RP

Pt
PT

CPU

Pin No.44

Pin No.45
Pin No.47

MD

Printer M42

HD

Pin No.62

Pin No.63

When the CPU starts printing, CPU sends MD signal to rotate motor unit.
Then the printer sends back the RP(reset pulse),PT and PT (Timing pulse) to CPU.
After CPU receives RP,PT andPT, CPU knows the position of printin wheel.
And then, CPU sends HD signal to operate the printing magnet when the character selected.
The CPU counts the TP signal to select the character.

5-4. Pin description (CPU uPD78044FGF)

Pin No. Signal In/Out

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
2 9 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

Mode SW

REG

Mode SW

OFF

AC cord
Plu

off

Description

osition (CAL

— 10 —