The Speaker Company TTP 248M User manual

TTP 248M

SERVICE

MANUAL

THERMAL TRANSFER / DIRECT THERMAL

BAR CODE PRINTER

i

TTP-248M Bar Code Printer

Service Manual

TABLE OF CONTENT

1. Foundamentals About the System .............................................................................. 1

Printer Overview ...................................................................................................... 1

Front View ........................................................................................................ 1

Rear View ........................................................................................................ 1

1.2 Pinter Specification ............................................................................................ 2

1.3 Available Bar Codes .......................................................................................... 4

1.4 Text Specification .............................................................................................. 5

Specification of Fonts ....................................................................................... 5

File Head of Font ( Fixed 32bytes ) .................................................................. 6

VF1~4 .............................................................................................................. 6

BF3~4 VF3~4 ................................................................................................... 7

2. Supply Specifications ................................................................................................. 8

2.1 Types of Paper .................................................................................................. 8

2.2 Specification ...................................................................................................... 8

2.3 Ribbon Specification .......................................................................................... 9

3. Circuit Description ................................................................................................. 10

3.1 MCU 10

3.2 MCU PIN Description ...................................................................................... 12

3.3 Reset Circuit .................................................................................................... 21

3.4 Memory System .............................................................................................. 22

3.5 Decoder Circuits .............................................................................................. 23

3.6 Memory Address Map ..................................................................................... 23

3.7 Firmware Address Map ................................................................................... 26

3.8 Power Down Sensor ............................................................................... 27

3.9 Print Head ....................................................................................................... 28

3.10 Motor System Circuit ..................................................................................... 29

3.11 Sensor Circuits .............................................................................................. 30

3.12 Serial Port Circuit .......................................................................................... 33

3.13 Parallel Port Circuit ....................................................................................... 34

3.14 Cutter Drive System ...................................................................................... 35

3.15 PIN Switch Circuits ........................................................................................ 36

3.16 Connector Circuits ......................................................................................... 36

3.17 Optional Items Circuits .................................................................................. 39

4. Machanism ............................................................................................................ 40

4.1 Remove the Covers and LCD Panel ............................................................... 40

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TTP-248M Bar Code Printer

Service Manual

4.2 Replacing the Mainboard ................................................................................ 43

4.3 Replacing the Power Supply Unit .................................................................... 44

4.4 Replacing the Ribbon Rewind Spindle ............................................................ 45

4.5 Replacing Ribbon Supply Spindle ................................................................... 48

4.6 Replacing Label Supply Spindle ...................................................................... 50

4.7 Replacing Label Rewind Spindle ..................................................................... 52

4.8 Replacing Platen ............................................................................................. 54

4.9 Replacing Motor .............................................................................................. 56

4.10 Replacing Print Head .................................................................................... 58

4.11 Replacing Print Head Pressure Adjustment Knob ......................................... 59

4.12 Replacing Gap/Black Mark Sensor ............................................................... 61

4.14 Replacing Print Head Lift Lever Sensor ........................................................ 64

5. Troubleshooting ........................................................................................................ 65

5.1 Troubleshooting ............................................................................................... 65

5.2 Calibrate Gap/Black Mark Sensor ................................................................... 66

5.3 Self-test ........................................................................................................... 67

5.4 DRAM Clear .................................................................................................... 67

5.5 Diagnosis Operation Procedure ...................................................................... 67

5.6 Cleaning Print Head ........................................................................................ 68

Update History.............................................................................................................. 69

1

TTP-248M Bar Code Printer

Service Manual

1. FOUNDAMENTALS ABOUT THE SYSTEM

Printer Overview

Front View

Fig. 1.1 Printer Front View

Rear View

Fig. 1.2 Printer Rear View

Aux. LED

LCD Display

Printer Cover

External Label

Feed Opening

Aux. Buzzer

Centronics Port

RS-232C Port

Voltage Switch

Power Supply

Connector

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TTP-248M Bar Code Printer

Service Manual

1.2 Pinter Specification

Item

Specification

Printing Mode

Thermal transfer and direct thermal

Resolution

203 DPI

Max. Print Length

999 mm

Max. Print Width

104 mm

Print Speed

Selectable speed of 4,6,8 inch per second

Environment

Temperature

5 ~40

O

C

Humidity

30 ~ 85 %

Temperature

-10 ~ 60

O

C

Humidity

20 ~ 95 %

Ventilation

Free air environment

Sensors

Label gap (256-level), ribbon end (16-level), black

mark (256-level), carriage open, ribbon near end

Memory

Flash Memory 2MB, DRAM 4MB and optional Flash

Memory 8MB

Interface

RS-232C 56000bps ( Max.), Centronics

Cutter

116 mm width (Paper thickness up to 0.28 mm)

Power

100 VAC to 120 VAC, 200 VAC to 240 VAC

Switching mode power supply.

Input Frequency : 50Hz to 60Hz

Input Current : 4.0 Amps at max.

Inrush Current :

40 Amps max. (cold start) at 115 VAC input line

voltage.

80 Amps max. (cold start) at 230 VAC input line

voltage.

Electrical

CPU

HITACH SH 7709A

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TTP-248M Bar Code Printer

Service Manual

TPH

ROHM KF2004-GL41D 550Ω

Stepping Motor

Mitsumi 24V 7.5 Degrees 4Ω Japan Servo KH56KM

2u023 1.80,24V,0.36Ω

Memory

SDRAM, 1M×16Brt×2 7ns

Flash Memory: (512K×16Bit) ×2 70ns

Compliance

CE, UL/CUL, BSMI, FCC Class A, TÜV-GS

Communication Interface

Communication

RS-232C (DB-9) at 2400, 4800, 9600 or 19200 38400,

56000, 57600, 115200, 128000, 50000 baud rate

Word Length

7 or 8 data bits, 1 or 2 stop bits, selectable parity

Communication Protocol

XON/XOFF and DSR/DTR

Parallel Port

Standard parallel interface

Input Buffer

10KB

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TTP-248M Bar Code Printer

Service Manual

 RS-232 Interface Pin Configuration:

Host

Function

9 Pin

25 Pin

9 Pin

Printer

Function

1

+5V

RxD

2

3

2

TxD

3

2

3

RxD

DTR

4

20

4

DSR

GND

5

7

5

GND

DSR

6

RDY

RTS

7

4

7

N/C

CTS

8

5

8

RDY

9

+5V

1.3 Available Bar Codes

 Code 39

 Code 39C

 Code 93

 Code128UCC

 Code128 subsets A.B.C

 Code 11

 Codabar

 Interleave 2 of 5

 EAN-8

 EAN-13

 EAN-128

 UPC-A

 UPC-E

 EAN and UPC 2(5) digits add-on

 CPOST

 MSI

 PLESSEY

 POSTNET

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TTP-248M Bar Code Printer

Service Manual

 EAN-14

 ITF14

 PDF-417

 Maxicode

 DataMatrix

1.4 Text Specification

Font

Width x Length

Font 1

8x12

Font 2

12x20

Font 3

16x24

Font 4

24x32

Font 5

32x48

Font 6

14x19 OCRB

Font 7

21x27 OCRB

Font 8

14x25 OCRA

Font

Width x Length

EAN 1

7x10

EAN 2

14x22

EAN 3

21x33

EAN 4

28x43

EAN 5

35x52

EAN 6

42x64

EAN 7

49x74

EAN 8

56x85

EAN 9

63x97

EAN 10

70x107

Font 1 to Font 8 are all build-in fonts and BF1 fonts.

EAN 1 to EAN 10 are the fonts used on Barcode UPC and EAN series (they

content numbers only).

The above are the fonts we approve on our printers.

Specification of Fonts

Fixed Pixel

Variable Pixel

Singed byte

Double byte

Decode by Table

BF1

X

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TTP-248M Bar Code Printer

Service Manual

BF2

X

BF3

X

BF4

X

VF1

X

VF2

X

VF3

X

VF4

X

File Head of Font ( Fixed 32bytes )

Offset 0

B->Bitmap font

Offset 1

0->Fixed pixel 1->Variable Pixel

Offset 2

0->Singed Byte Decode 1->Double Byte

Decode

Offset 3

Decode by table

Offset 4

0-> None 1->Italic

Offset 5-6

Font Height

Offset 7-8

Font Width

Offset 9-10

Font decode start

Offset 11-12

Font decode end

Offset 13

Font decode type

Offset 14

Reserved

Offset 15-16

Font character total

Offset 17-18

Italic Width Variable

Offset 19-31

Reserved

If ( BF1 BF2 VF1 VF2 )

Offset 32-xx : Font Data

Else if( BF3 BF4 VF3 VF4 )

Offset 32-xx : Decoded Table

Offset xx-xx : Font Data

VF1~4

Font data of variable pixel

(width low byte)(width high byte) Font Data

Font of variable printing spacing is two-bite-width of word in front of the data of

every word.

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TTP-248M Bar Code Printer

Service Manual

BF3~4 VF3~4

Decode Table

(char low byte) (char high byte) (offset 4 bytes ==> file start to font data)

The font with decade table, the previous two bytes of every word is the code of the

word, and the later four bytes is the displacement from the file head to the position

of the data of the word.

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TTP-248M Bar Code Printer

Service Manual

2. SUPPLY SPECIFICATIONS

2.1 Types of Paper

Two types of media are available for TTP-248M/2410M : label and ticket.

In TTP-248M/2410M, there are two types of sensors for paper : gap sensor and

black mark sensor.

Label and ticket can be further classified into direct thermal type or thermal transfer

type.

2.2 Specification

Item

Specification

Type

Label (Continuous, die-cut, fan-fold, ticket, Tag etc.)

Label Width

19～118 mm ( 0.7”～4.65” )

Label Length

10～999 mm ( 0.4”～39.33” )

Label Thickness

0.06～0.25 mm

Label Roll Diameter

203 mm

Paper Core ID

25.7± 0.3 mm

Paper Weight

Less than 280 g/m

2

Rewinder Roll diameter

138 mm (Max.) with 1" core

Label Roll Diameter

without Rewinder

254 mm (Max.) with 3" core

Roll Core Diameter

25 ~ 77 mm

Black Mark Height

1.5 mm ( Min.)

Black Mark Width

3 mm ( Min.)

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TTP-248M Bar Code Printer

Service Manual

2.3 Ribbon Specification

Item

Specification

Ribbon Shape

Spool type

Ribbon Width

25.4～114.3 mm

Ribbon Length

450 m

Diameter

Less than 3.5” ( 89 mm)

Roll Up Method

Print surface wound outside as standard.

Note: The maximum length of ribbon depends on its thickness and core outside

diameter.

The formula below defines the correlation between ribbon roll length and ribbon core

diameter.

t4

)d(D

= L

22





,

where

L = Ribbon length

D = Max. roll diameter

d = Ribbon core outside diameter

t = Ribbon thickness

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TTP-248M Bar Code Printer

Service Manual

3. CIRCUIT DESCRIPTION

3.1 MCU

VC C

X1

16M Hz

C1

15pF

C2

15pF

GN D

C3

470p

C4

470p

B

y

p

a

s

C

a

p

a

c

i

t

o

r

l

i

s

t

(

0

.

1

u

F

)

GN D

VC C

D0

D1

D2

D3

D4

D5

D6

D7

D8

D9

D10

D11

D12

D13

D14

D15

VC C L

L1

0

L2

0

L3

0

EN_M B

INB_ R

INA_ R

EN_M A

EN_C UTTER

PHA SE

/B K

C TSEN S

/INB _R

/INA _R

M OTER_C

PEEL_S EN S

M OTO R

M OTO R.SCH

EN_M B

INB_ R

INA_ R

EN_M A

EN_C UTTER

PHA SE

/B K

C TSEN S

/INB _R

/INA _R

M OTER_C

PEEL_S EN S

KEY 1

KEY 2

KEY 3

B1

B UZZER

R 10

10K

R 11

1K

TH_SENS

HEA D_SENS

C ASE_SENS

PEEL_S EN S

R EN D_SENS

D16

D17

D18

D19

D20

D21

D22

D23

D24

D25

D26

D27

D28

D29

D30

D31

VD D

R 17

10K

LCD _D0

LCD _D1

LCD _D2

LCD _D3

LCD _D4

LCD _D5

LCD _D6

LCD _D7

LCD _C S2

LCD _C S1

LCD _W /R

GN D

GN DD IGITA L GND

SELEC T

PE

ERR OR

/Wa it

/DStrb

/Init

/AStrb

VD D R 18

10K

R 56

100

C5

220p

VD D

D0

D1

D2

D3

D4

D5

D6

D7

/Write

Intr

A0

A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

A13

A14

A15

A16

A17

A18

A19

A20

A21

A22

A23

A24

A25

D0

D1

D2

D3

D4

D5

D6

D7

A20

A21

A22

A23

VC C

/Wa it

/DStrb

D0

D1

D2

D3

D4

D5

D6

D7

/Write

Intr

/Init

/AStrb

D[0.. 31] A [0..25 ]

C KE

C LK

/R AS3L

/C AS

/WE

/WE0 /DQM LL

DQ M LU

SDR AM

R OM 1

R OM 2

/R ESET

/R D

R OM 3

R OM 4

C S0

C S2

C S3

SCK

SDI

SDO

C SI

DQ M UL

DQ M UU

M EMO RY

M EMO RY .SCH

D[0.. 31] A [0..25 ]

C KE

C LK

/R AS3L

/C AS

/WE

/WE0 /DQM LL

DQ M LU

SDR AM

R OM 1

R OM 2

/R ESET

/R D

R OM 3

R OM 4

C S0

C S2

C S3

SCK

SDI

SDO

C SI

DQ M UL

DQ M UU

/R ESET

C LK

C TSEN S

LED1

LED2

LED3

/DStrb_ I

Intr_I

/Init_I

/AStrb_ I

1

2

3

4

5

6

JP 1

JTAG

GN D

VC C

DI3

DI1

DI2

DI4

C LK

/LAT

TM

STB1

STB2

STB3

STB4

Vde t

/R ESET_PH

PRIN TH EAD

PRIN T. SCH

DI3

DI1

DI2

DI4

C LK

/LAT

TM

STB1

STB2

STB3

STB4

Vde t

/R ESET_PH

PH_I

/R ESE T

C LK

STB1 _I

STB2 _I

STB3 _I

STB4 _I

VC C

GN D

C 1+

1

V+

2

C 1-

3

C 2+

4

C 2-

5

V-

6

T2OU T

7

R 2IN

8

R 2OUT

9

T2IN

10

T1IN

11

R 1OUT

12

R 1IN

13

T1OU T

14

VC C

16

GN D

15

U31

SP3232 E

C9

0.1u

C 10

0.1u

VC C

C 11

0.1u

C 17

0.1u

GN D

L7

B EA D 300

L8

B EA D 300

L9

B EA D 300

L10

B EA D 300

C 12

0.1uG ND

F1

1A

TX

RX

DSR

R DY

GN D

TM

Vde t

TM Vde t

GN D

1

2

3

4

JP 2

R NE_END

R TC _O

X2

32.76 8kHz

C 18

22pF

C 19

22pF

GN D

VC C

5

9

4

8

3

7

2

6

1

JP 3

DB 9_1

/LAT_P

C TSEN S

R 57

100

R 58

100

R 59

820

/R ESE T

D[0.. 31]

VC C

GA P_SENSER

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

JP 4

C EN TRON IC

TTP-2410_MAIN

VD D

AV SS

C S0

C S2

C S3

C S0

C S2

C S3

SCK

SDI

SDO

SCK

SDI

SDO

VC C

1

R xD

2

TxD

3

GN D

4

D+

5

D-

6

R-

7

R+

8

U32

LTC490

GN D

VC C

R 80

120

R 81

120

L12

INDU C TO R1

L13

INDU C TO R1

L14

INDU C TO R1

L15

INDU C TO R1

VC C C SI

C SI

R 19

10K

P_INT

POW ER po we r.s ch

P_INT

1 2

U3A

74HC 1 4

3 4

U3B

74HC 1 4

5 6

U3C

74HC 1 4

R 20

10K

R 21

10K

R 22

10K

VC C

AV CC

AV SS

AVSS

GN D

L4

0

DIGITAL GND

C 20

0.01u F

B C1

10uF

R 60

100

R 61

100

D2

1N41 48

D3

1N41 48

D4

1N41 48

D5

1N41 48

C 23

0.1uF

C 24

0.1uF

AV CC VC C

L5

0

AV CC AVC C

AV SS AV SS

R 12

1K

R 13

1K

R 62

100

D6

1N41 48

D7

1N41 48

C 25

0.1uF

AV CC

AV SS

R 14

1K

3

2

1

4

11

U5A

LM3 24

R 63

100

GN D

VD D

GN D8 9

U3D

74HC 1 4

10 11

U3E

74HC 1 4

B M_ SEN

1

2

JP 5

2PIN

MA

MB

R 23

1.5K

R 24

1.5K

VD D

GN D

VC C

R 64

100

R 25

10K

12 13

U3F

74HC 1 4

5

6

7

U5B

LM3 24

R 65

100

GA P_E

B M_ E

R 26

10K

R 27

4.7K

ME

B C2

0.1uF

B C3

0.1uF

B C4

0.1uF

B C5

0.1uF

B C6

0.1uF

B C7

0.1uF

B C8

0.1uF

B C9

0.1uF

B C1 0

0.1uF

B C1 1

0.1uF

B C1 2

0.1uF

B C1 3

0.1uF

B C1 4

0.1uF

B C1 5

0.1uF

B C1 6

0.1uF

B C1 7

0.1uF

B C1 8

0.1uF

B C1 9

0.1uF

B C2 0

0.1uF

B C2 1

0.1uF

B C2 2

0.1uF

B C2 3

0.1uF

B C2 4

0.1uF

B C2 5

0.1uF

B C2 6

0.1uF

B C2 7

0.1uF

B C2 8

0.1uF

C 26

0.1uF

VC C

B C2 9

0.1uF

B C3 0

0.1uF

B C3 1

0.1uF

B C3 2

0.1uF

VC C

GN D

R 28

10K

1 2

U6A 74HC T14

Q3

2SC2 411K

R 29

10K

VD D

1

2

JP 9

NM IGN D

R 30

10K

VC C

SW1

SW-PB

A0

A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

A13

A14

A15

A16

A17

A18

A19

A20

A21

A22

A23

A24

A25

VC C

VD D

P21

P22

VC C 1VC C 2

VC C 3

R 66

100

R 67

100

34

U6B 74 HC T14

56

U6C

74HC T14

8 9

U6D

74HC T14

PE

SELEC T

ERR OR

SELEC T

PE

VC C IO

1

GTS3

2

GT S4

3

4

GTS1

5

GTS2

6

7

VC C IN T

8

9

10

11

12

13

14

15

16

17

GN D

18

19

20

21

22

23

24

25

26

27

28

GN D

29

GC K1

30

31

GC K2

32

33

34

35

GN D

36

VC C IO

37

GC K3

38

39

40

41

VC C IN T

42

43

44

45

46

GN D

47

48

49

50

51

52

53

54

VC C IO

55

56

57

58

59

60

61

GN D

62

TDI

63

64

TMS

65

66

TCK

67

68

69

70

71

GN D

72

VC C IO

73

74

7576

77

78

79

80

81

82

83

VC C IN T

84

85

86

87

88

GN D

89

GN D

90

91

92

93

94

95

96

97

98

GN D

99

100

101

102

103

104

105

106

107

GN D

108

VC C IO

109

110

111

112

113

GN D

114

115

116

117

118

119

120

121

TDO

122

GN D

123

124

125

126

VC C IO

127

128

129

130

131

132

133

134

135

136

137

138

139

140

VC C IN T

141

142

GSR

143

GN D

144

U2

XC 951 44XL

R 31

10K

R 32

10K

10 11

U6E 74 HC T14

R 33

10K

R 34

10K

R 82

4.7K

C 39

1u

VD D

GN D

LCD _D/I

LCD _E

R 35

10K

R 36

10K

VD D

1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

17 18

19 20

21 22

23 24

25 26

27 28

29 30

JP 10

PAN L

R 37

1K

VD D

R 68

100

GN D

LCD _B L

KEY 1

KEY 2 KEY 3

LED1 LED2

LED3

YELLOW

R ED

Q1

HSC 94 5

12 13

U6F

74HC T14

PH_I

/LAT_P

1

2

JP 11

B UZZER

RB

RA

Q4

HSC 94 5

R 38

10K

R 69

100

Q5

HSC 94 5

R 39

10K

R 70

100

VD D

R _EN D1

R _EN D2

R _EN D3

R _EN D0

M OTER_E

M OTER_C

R ED

YELLOW

HEA D_SENS

C ASE_SENS

R EN D_SENS

R _EN D

SENSO R

SENSO R.SC H

HEA D_SENS

C ASE_SENS

R EN D_SENS

R _EN D

HEA D_SENS

C ASE_SENS

1 2

U9A

74LS05

3 4

U9B

74LS05

5 6

U9C

74LS05

89

U9D

74LS05

R 84

3.3K

R 85

1.8K

R 86

910

R 87

430

R _EN D

R EN D_SENS

PEEL_S EN S

A0

53

A1

54

A2

55

A3

56

A4

58

A5

60

A6

61

A7

62

A8

63

A9

64

A10

65

A11

66

A12

67

A13

68

A14

70

A15

72

A16

73

A17

74

A18

75

A19

76

A20

77

A21

78

A22

80

A23

82

A24

84

A25

86

Vc cQ

59

Vc cQ

71

Vc cQ

85

Vc cQ

97

Vc cQ 111

Vc cQ 163

Vc cQ 183

Vs sQ

57

Vs sQ

69

Vs sQ

83

Vs sQ

95

Vs sQ109

Vs sQ161

Vs sQ181

Vs s

79

Vs s27

Vs s

132

Vs s

152

Vs s

153

Vs s

173

Vs sQ

19

Vs sQ

33

Vs sQ

45

Vc cQ

47

Vc cQ

35

Vc cQ

21

Vc c

175

Vc c

154

Vc c

134

Vc c

81

Vc c 29

D0

52

D1

51

D2

50

D3

49

D4

48

D5

46

D6

44

D7

43

D8

42

D9

41

D10

40

D11

39

D12

38

D13

37

D14

36

D15

34

PTB7 /D31

13

PTB6 /D30

14

PTB5 /D29

15

PTB4 /D28

16

PTB3 /D27

17

PTB2 /D26

18

PTB1 /D25

20

PTB0 /D24

22

PTA7/D 23

23

PTA6/D 22

24

PTA5/D 21

25

PTA4/D 20

26

PTA3/D 19

28

PTA2/D 18

30

PTA1/D 17

31

PTA0/D 16

32

/M C S7 /PIN T7 /PTC 7

177

/M C S6 /PIN T6 /PTC 6

178

/M C S5 /PIN T5 /PTC 5

179

/M C S4 /PIN T4 /PTC 4

180

/M C S3 /PIN T3 /PTC 3

185

/M C S2 /PIN T2 /PTC 2

186

/M C S1 /PIN T1 /PTC 1

187

/M C S0 /PIN T0 /PTC 0

188

TxD0 /SCPT0

164

SCK 0/SC PT1

165

TxD1 /SCPT2

166

SCK 1/SC PT3

167

TxD2 /SCPT4

168

SCK 2/SC PT5

169

R TS2 /SCPT6

170

R xD0/SC PT0

171

R xD1/SC PT2

172

R xD2/SC PT4

174

C TS2 /IR Q5/SC PT7

176

XT A L

155

E XT AL

156

XT A L2

4

E XT AL 2

5

Vs s- RT C

6

Vc c-RT C

3

AV cc205

AV s s208

Vs s- PL L 1

147

Vs s- PL L 2

148

Vc c-PL L1

145

Vc c-PL L2

150

AN 0/PTL0

199

AN 1/PTL1

200

AN 2/PTL2

201

AN 3/PTL3

202

AN 4/PTL4

203

AN 5/PTL5

204

DA 1/A N6/PTL6

206

DA 0/A N7/PTL7

207

M D1

1

M D2

2

M D3

195

M D4

196

M D5

197

AV s s198

M D0

144

C AP1

146

C AP2

149

C KIO

162

CA

194

/R AS3L/PTJ0

106

/R AS2L/PTJ1

107

/C ASLL/CAS /PTJ 2

108

/C ASU /CASLH /PTJ 3

110

/C ASH L/PTJ4

112

/C ASH H/PTJ 5

113

STATUS0/ PTJ 6

157

STATUS1/ PTJ 7

158

TDO /PTE0

120

/C AS2L/PTE6

116

/C AS2H /PTE3

117

/R AS3U /PTE2

118

/C AS2U /PTE1

119

/C E2 A/PTE4

103

/C E2 B/PTE5

104

PTE7

94

/R ESE T M

124

/R ESE T P

193

PTG0/A UTAD A0

135

PTG1/A UTAD A1

133

PTG2/A UTAD A2

131

PTG3/A UTAD A3

130

PTG4

129

/ASEBR K AK /PTG 5

128

/ASM D O/PTG6

127

IOIS16/PTG7

126

/WA IT

123

/B ACK

121

/B RE Q

122

/IRQ OUT

160

DR AK 1/PTD0

190

DR AK 0/PTD1

189

R ESTO UT/PTD2

184

W AKEUP /PTD3

182

/DR EQ0/PTD 4

191

/DR EQ1/PTD 6

192

/DAC K 0/PTD5

114

/DAC K 1/PTD7

115

/R D

88

/WE0 /DQM LL

89

/WE1 /DQM LU/ /WE

90

/WE2 /DQM U L//IC IORD /PTK6

91

/WE3 /DQM U U//ICIO WR /PTK 7

92

/WR /R D

93

/C S0/M CS0

96

/C S2/PTK0

98

/C S3/PTK1

99

/C S4/PTK2

100

/C S5//CE1A /PTK 3

101

/B S/PTK 4

87

C KE/PTK5

105

NM I

7

/C S6//CE1B

102

PTF7/PINT15

136

TRST/PTF6/PINT14

137

TRST/PTF5/PINT13

138

TRST/PTF4/PINT12

139

PTF3/PINT11

140

/IRLS2/PTF2/PINT10

141

/IRLS1/PTF1/PINT9

142

/IRLS0/PTF0/PINT8

143

/IRLO/IR Q0/PTH 0

8

/IRL1/IR Q1/PTH1

9

/IRL2/IR Q2/PTH2

10

/IRL3/IR Q3/PTH3

11

IRQ4 /PTH4

12

AD TRG /PTH 5

125

PTH6

151

T CL K/ PT H7

159

SH77 09A

U1

SH-770 9A

RB

RA

B UZZER

R 40

10K

VC C

R 71

100

B UZZER_O

B UZZER

DQ M UL

DQ M UU

BK

VM M

R 41

10K

VC C

VD D

AG ND

LCD _D0

LCD _D1 LCD _D2

LCD _D3 LCD _D4

LCD _D5 LCD _D6

LCD _D7 LCD _C S1

LCD _C S2 LCD _/R ES

LCD _R /W LC D_D /I

LCD _E B AC K LIGHT

R Y

10

9

8

U5C

LM3 24

R 126

100

M OTER_C

B _IN1

B _IN2

B _IN3

B _OUT1

B _OUT2

B _OUT1

B _OUT2

B _IN1

B _IN2

B _IN3

AD 1

AD 2

B K_IO

B K_IO .SC H

B _OUT1

B _OUT2

B _IN1

B _IN2

B _IN3

AD 1

AD 2

B _OUT1

B _OUT2

B _IN1

B _IN2

B _IN3

C KE

/WE

/R D

DQ M LL

DQ M LU

/C AS

/R AS3L

A24

A25

/R ST

1

GN D

2

VC C 3

3

VC C 5

4

VC C A

5

U10

LTC172 8

VC C

VD D

VC C L

R2

3.4K

R3

3.0K

GN D

PR12

10K

PC4

220p

PC1

220p

PC2

220p

PC3

220p

PR1 10K

PR2

10K

PR3

10K

PR4

10K

PR5

10K

PR6

10K

PR7

10K

PR8

10K

PR9

10K PR10 10K

PR11

10K

PR14

10K

PR15

10K

PR16

10K

PR17

10K

PR18

10K

PR19

10K

PR20

10K

PR21

10K

PR22

100

PR23

100

PR24

100

PR25

100

R OM 1

R 130

10K

C 77

0.1uF

C 78

0.1uF

GN D GND

VC C

VM M

U

9

-

>

V

D

AD 1

AD 2

AD 1

AD 2

10 11

U4E

74HC 1 4

1213

U4F

74HC 1 4

1011

U9E

74LS05

1213

U9F

74LS05

VC C

GN D

1

2

JP 27

2PIN

R 95

10K

L24

B EA D 080 5 NB 22 0

1

2

JP 28

2PIN

PE_I

SELEC T_I

ERR OR _I

PE_I

SELEC T_I

ERR OR _I

VD D

GN D

Q14

HSC 94 5

Q15

HSC 94 5

1

2

3

4

5

6

7

JP 12

GA P_E&B M_S EN

R 137

100

TXD

L31

0

L30

0

R 138

100

R 139

100

R 140

100

C 82

0.1u

C 83

0.1u

C 84

0.1u

GN D

Fig. 3.1 MCU Circuit Diagram

The mainboard of TTP-248M/2410M includes seven system blocks:

A. Memory System (decoder & memory block)

B. Motor System (stepping motor, DC motor and cutter block)

C. Print Head System

D. Communication System (serial & parallel port block)

E. Power System

F. Sensor System

G. LCD Display System

11

TTP-248M Bar Code Printer

Service Manual

The figure below shows the PCB system area:

Fig. 3.2 System Block of PCB

MCU

Communication port

Decoder

System

External Memory

Connector

Memory

System

Cutter System

Motor

System

Power

System

Print

Head

Connector

Sensor

Connector

Option I/O

12

TTP-248M Bar Code Printer

Service Manual

3.2 MCU PIN Description

13

TTP-248M Bar Code Printer

Service Manual

14

TTP-248M Bar Code Printer

Service Manual

15

TTP-248M Bar Code Printer

Service Manual

16

TTP-248M Bar Code Printer

Service Manual

17

TTP-248M Bar Code Printer

Service Manual

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The Speaker Company TTP 248M User manual

The Speaker Company TTP 248M User manual

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