TSC TTP 246M User manual

TTP/TDP 248M/2410M
SERVICE
MANUAL
THERMAL TRANSFER / DIRECT THERMAL
BAR CODE PRINTER

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TTP-248M/2410M Bar Code Printer
Service Manual
TABLE OF CONTENT
1. Foundamentals About the System ............................................................................. 1
1.1 Printer Overview................................................................................................ 1
1.1.1 Front View............................................................................................... 1
1.1.2 Rear View ............................................................................................... 2
1.2 Pinter Specification ........................................................................................... 2
1.3 Available Bar Codes.......................................................................................... 4
1.4 Text Specification .............................................................................................. 5
Specification of Fonts....................................................................................... 6
File Head of Font ( Fixed 32bytes ).................................................................. 6
VF1~4 .............................................................................................................. 7
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 Map ................................................................................................... 23
Area P2.......................................................................................................... 23
3.7 Firmware Address Map ................................................................................... 25
SDRAM 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

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TTP-248M/2410M Bar Code Printer
Service Manual
4. Machanism............................................................................................................ 41
4.1 Remove the Covers and LCD Panel ............................................................... 41
4.2 Replacing the Mainboard ................................................................................ 45
4.3 Replacing the Power Supply Unit.................................................................... 47
4.4 Replacing the Ribbon Rewind Spindle ............................................................ 48
4.5 Replacing Ribbon Supply Spindle and Ribbon Near End Sensor ................... 51
4.6 Replacing Label Supply Spindle...................................................................... 53
4.7 Replacing Label Rewind Spindle..................................................................... 54
4.8 Replacing Platen ............................................................................................. 55
4.9 Replacing Motor.............................................................................................. 57
4.10 Replacing Print Head .................................................................................... 58
4.11 Replacing Print Head Pressure Adjustment Knob ......................................... 59
4.12 Replacing Gap/Black Mark Sensor ............................................................... 60
4.13 Replacing Ribbon End Sensor ...................................................................... 62
4.14 Replacing Print Head Lift Lever Sensor ........................................................ 63
5. Part Lists .................................................................................................................. 64
6. Troubleshooting........................................................................................................ 69
6.1 Troubleshooting............................................................................................... 69
6.2 Calibrate Gap/Black Mark Sensor ................................................................... 71
6.3 Self-test........................................................................................................... 71
6.4 DRAM Clear.................................................................................................... 72
6.5 Diagnosis Operation Procedure ...................................................................... 72
6.6 Cleaning Print Head ........................................................................................ 72

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TTP-248M/2410M Bar Code Printer
Service Manual
1. FOUNDAMENTALS ABOUT THE SYSTEM
1.1Printer Overview
1.1.1 Front View
Fig. 1.1 Printer Front View
Aux. LED
LCD Display
Printer Cover

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TTP-248M/2410M Bar Code Printer
Service Manual
1.1.2 Rear View
Fig. 1.2 Printer Rear View
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
OC
Humidity 30 ~ 85 %
Temperature -10 ~ 60 OC
Humidity 20 ~ 95 %
External Label
Feed Opening
Aux. Buzzer
Centronics Port
RS-232C Port
Voltage Switch
Power Supply
Connector

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TTP-248M/2410M Bar Code Printer
Service Manual
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
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
TPH ROHM KF2004-GL41D 550Ω
Stepping Motor Mitsumi 24V 7.5 Degrees 4ΩJapan Servo KH56KM
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/2410M 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
TxD 3 2 3 RxD
DTR 4 20 4 DSR
GND 5 7 5 GND
DSR 6 6 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

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TTP-248M/2410M Bar Code Printer
Service Manual
 PLESSEY
 POSTNET
 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).

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TTP-248M/2410M Bar Code Printer
Service Manual
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 X
BF2 X X
BF3 X X X
BF4 X X X
VF1 X X
VF2 X X
VF3 X X X
VF4 X X 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 Reversed
Offset 15-16 Font character total
Offset 17-18 Italic Width Variable
Offset 19-31 Reversed
If ( BF1 BF2 VF1 VF2 )
Offset 32-xx : Font Data

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TTP-248M/2410M Bar Code Printer
Service Manual
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.
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/2410M 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/m2
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/2410M 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 π×−
,
where
L = Ribbon length
D = Max. roll diameter
d = Ribbon core outside diameter
t = Ribbon thickness

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TTP-248M/2410M Bar Code Printer
Service Manual
3.CIRCUIT DESCRIPTION
3.1 MCU
VCC
X1
16MHz
C1
15pF
C215pF GND
C3
470p
C4
470p
B
y
p
a
s
s
C
a
p
a
c
i
t
o
r
l
i
s
tGND
VCC
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
VCCL
L1
0
L2
0
L3
0
EN_MB
INB_R
INA_R
EN_MA
EN_CUTTER
PHASE
/BK
CTSENS
/INB_R
/INA_R
MOTER_C
PEEL_SENS
MOTOR
MOTOR.SCH
EN_MB
INB_R
INA_R
EN_MA
EN_CUTTER
PHASE
/BK
CTSENS
/INB_R
/INA_R
MOTER_C
PEEL_SENS
KEY1
KEY2
KEY3
B1
BUZZER R10
10K
R11
1K
TH_SENS
HEAD_SENS
CASE_SENS
PEEL_SENS
REND_SENS
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
VDD
R17
10K
LCD_D0
LCD_D1
LCD_D2
LCD_D3
LCD_D4
LCD_D5
LCD_D6
LCD_D7
LCD_CS2
LCD_CS1
LCD_W/R
GND
GNDDIGITAL GND
SELECT
PE
ERROR
/Wait
/DStrb
/Init
/AStrb
VDD R18
10K
R56 100
C5
220p
VDD
VDD
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
VCC
/Wait
/DStrb
D0
D1
D2
D3
D4
D5
D6
D7
/Write
Intr
/Init
/AStrb
D[0..31] A[0..25]
CKE
CLK
/RAS3L
/CAS
/WE
/WE0/DQMLL
DQMLU
SDRAM
ROM1
ROM2
/RESET
/RD
ROM3
ROM4
CS0
CS2
CS3
SCK
SDI
SDO
CSI
DQMUL
DQMUU
MEMORY
MEMORY.SCH
D[0..31] A[0..25]
CKE
CLK
/RAS3L
/CAS
/WE
/WE0/DQMLL
DQMLU
SDRAM
ROM1
ROM2
/RESET
/RD
ROM3
ROM4
CS0
CS2
CS3
SCK
SDI
SDO
CSI
DQMUL
DQMUU
/RESET
CLK
CTSENS
LED1
LED2
LED3
/DStrb_I
Intr_I
/Init_I
/AStrb_I
1
2
3
4
5
6
JP1
JTAG
GND
VCC
DI3
DI1
DI2
DI4
CLK
/LAT
TM
STB1
STB2
STB3
STB4
Vdet
/RESET_PH
PRINTHEAD
PRINT.SCH
DI3
DI1
DI2
DI4
CLK
/LAT
TM
STB1
STB2
STB3
STB4
Vdet
/RESET_PH
PH_I
/RESET
CLK
STB1_I
STB2_I
STB3_I
STB4_I
VCC
GND
C1+ 1 V+
2
C1- 3
C2+ 4
C2- 5
V-
6
T2OUT
7
R2IN
8R2OUT 9
T2IN 10
T1IN 11
R1OUT 12 R1IN
13 T1OUT
14
VCC 16
GND
15
U31
SP3232E
C9
0.1u
C10
0.1u
VCC
C11
0.1u
C17
0.1u
GND
GND
L7
BEAD 300
L8
BEAD 300
L9
BEAD 300
L10
BEAD 300
C12
0.1uGND
F1
1A
TX
RX
DSR
RDY
GND
TM
Vdet
TM Vdet
GND
1
2
3
4JP2
RNE_END
RTC_O
RTC_O
X2
32.768kHz
C18
22pF
C19
22pF
GND
GND
VCC
VCC
5
9
4
8
3
7
2
6
1
JP3
DB9_1
/LAT_P
CTSENS
R57
100
R58
100
R59
820
/RESET
D[0..31]
VCC
GAP_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
JP4
CENTRONIC
TTP-2410_MAIN
VDD
AVSS
CS0
CS2
CS3
CS0
CS2
CS3
SCK
SDI
SDO
SCK
SDI
SDO
VCC 1
RxD 2
TxD 3
GND 4 D+
5
D-
6
R-
7
R+
8
U32
LTC490 GND
VCC
R80
120
R81
120
INDUCTOR1
L13
INDUCTOR1
L14
INDUCTOR1
L15
INDUCTOR1
VCC CSI
CSI
R19
10K
P_INT
POWER power.sch
P_INT
1 2
U3A
74HC14 3 4 U3B
74HC14 5 6
U3C
74HC14
R20
10K
R21
10K
R22
10K
VCC
AVCC
AVSS
AVSS
GND
L4
0
DIGITAL GND
C20
0.01uF
BC1
10uF
R60
100 R61 100
D2
1N4148
D3
1N4148
D4
1N4148
D5
1N4148
C23
0.1uF
C24
0.1uF
AVCC VCC
L5
0
AVCC AVCC
AVSS AVSS
R12
1K R13 1K
R62
100
D6
1N4148
D7
1N4148
C25
0.1uF
AVCC
AVSS
R14
1K
3
21
411
U5A
LM324
R63
100
GND
VDD
GND8 9
U3D
74HC14
10 11
U3E
74HC14
BM_SEN
1
2
JP5
2PIN
MA
MB
R23
1.5K
R24
1.5K VDD
GND
VCC
R64
100
R25
10K
12 13
U3F
74HC14
5
67
U5B
LM324
R65
100
GAP_E
BM_E
R26
10K
R27
4.7K
ME
BC2
0.1uF BC3
0.1uF BC4 0.1uF BC5 0.1uF BC6 0.1uF BC7 0.1uF BC8 0.1uF BC9 0.1uF BC10 0.1uF
BC11
0.1uF BC12 0.1uF BC13 0.1uF BC14 0.1uF BC15 0.1uF
BC16
0.1uF BC17
0.1uF BC18 0.1uF BC19 0.1uF BC20 0.1uF BC21 0.1uF BC22 0.1uF BC23 0.1uF BC24 0.1uF BC25 0.1uF
BC26
0.1uF BC27 0.1uF BC28 0.1uF C26 0.1uF
VCC
BC29
0.1uF
BC30
0.1uF BC31 0.1uF BC32 0.1uF
VCC
VCC
VCC
GND
R28
10K
1 2
U6A 74HCT14
Q3
2SC2411K
R29
10K
VDD
1
2
JP9
NMI
GND
R30
10K
VCC
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
VCC
VDD
VDD
P21
P22
VCC1VCC2
VCC3
R66
100
R67
100
34
U6B 74HCT14
56 U6C
74HCT14
8 9
U6D
74HCT14
PE
SELECT
ERROR
ERROR
SELECT
PE
VCCIO 1
GTS3 2
GTS4 3
4
GTS1 5
GTS2 6
7
VCCINT 8
9
10
11
12
13
14
15
16
17
GND
18
19
20 21 22 23 24
25
26
27
28
GND
29
GCK1 30
31
GCK2 32
33
34
35
GND
36
VCCIO 37
GCK3 38
39
40
41
VCCINT 42
43
44
45
46
GND
47
48
49
50
51
52
53
54
VCCIO 55
56
57
58
59
60
61
GND
62
TDI 63
64
TMS 65
66
TCK 67
68
69
70
71
GND
72
VCCIO 73
74 7576 77
78
79
80
81
82
83
VCCINT 84
85
86
87
88
GND
89 GND 90
91
92
93
94
95
96
97
98
GND
99
100
101
102
103
104
105
106
107
GND
108
VCCIO 109
110
111
112
113
GND
114
115
116
117
118
119
120
121
TDO 122
GND
123
124
125
126
VCCIO 127
128
129
130
131
132
133
134
135
136
137
138
139
140
VCCINT 141
142
GSR 143
GND
144
U2
XC95144XL
R31
10K R32
10K
10 11
U6E 74HCT14
R33
10K
R34
10K R82 4.7K
C39
1u
VDD
GND
LCD_D/I
LCD_E
R35
10K
R36
10K
VDD
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
JP10
PANL
R37
1K
VDD
R68
100
GND
LCD_BL
KEY1
KEY2 KEY3
LED1 LED2
LED3
YELLOW
RED
Q1
HSC945
12 13
U6F
74HCT14
PH_I
/LAT_P
1
2JP11
BUZZER
RB
RA
Q4
HSC945
R38
10K
R69
100
Q5
HSC945
R39
10K
R70
100
VDD
R_END1
R_END2
R_END3
R_END0
MOTER_E
MOTER_C
RED
YELLOW
HEAD_SENS
CASE_SENS
REND_SENS
R_END
SENSOR
SENSOR.SCH
HEAD_SENS
CASE_SENS
REND_SENS
R_END
HEAD_SENS
CASE_SENS
1 2
U9A
74LS05
3 4
U9B
74LS05
5 6
U9C
74LS05
89
U9D
74LS05
R84
3.3K
R85
1.8K
R86
910
R87
430
R_END
R_END
REND_SENS
PEEL_SENS
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
VccQ 59 VccQ 71 VccQ 85 VccQ 97 VccQ 111 VccQ 163 VccQ 183
VssQ
57
VssQ
69
VssQ
83
VssQ
95
VssQ
109
VssQ
161
VssQ
181
Vss
79 Vss 27
Vss
132
Vss
152
Vss
153
Vss
173
VssQ
19
VssQ
33
VssQ
45
VccQ 47 VccQ 35 VccQ 21
Vcc 175 Vcc 154 Vcc 134 Vcc 81 Vcc 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/D23 23
PTA6/D22 24
PTA5/D21 25
PTA4/D20 26
PTA3/D19 28
PTA2/D18 30
PTA1/D17 31
PTA0/D16 32
/MCS7/PINT7/PTC7
177 /MCS6/PINT6/PTC6
178 /MCS5/PINT5/PTC5
179 /MCS4/PINT4/PTC4
180 /MCS3/PINT3/PTC3
185
/MCS2/PINT2/PTC2
186
/MCS1/PINT1/PTC1
187
/MCS0/PINT0/PTC0
188
TxD0/SCPT0
164
SCK0/SCPT1
165
TxD1/SCPT2
166
SCK1/SCPT3
167
TxD2/SCPT4
168
SCK2/SCPT5
169
RTS2/SCPT6
170
RxD0/SCPT0
171
RxD1/SCPT2
172
RxD2/SCPT4
174
CTS2/IRQ5/SCPT7
176
XTAL 155
EXTAL 156
XTAL2 4
EXTAL2 5
Vss-RTC
6
Vcc-RTC 3
AVcc
205
AVss
208
Vss-PLL1 147 Vss-PLL2 148
Vcc-PLL1 145 Vcc-PLL2 150
AN0/PTL0 199
AN1/PTL1 200
AN2/PTL2 201
AN3/PTL3 202
AN4/PTL4 203
AN5/PTL5 204
DA1/AN6/PTL6 206
DA0/AN7/PTL7 207
MD1 1
MD2 2
MD3
195 MD4
196
MD5
197
AVss
198
MD0 144
CAP1 146 CAP2 149
CKIO
162
CA 194
/RAS3L/PTJ0
106
/RAS2L/PTJ1
107
/CASLL/CAS/PTJ2
108
/CASU/CASLH/PTJ3 110
/CASHL/PTJ4 112
/CASHH/PTJ5 113
STATUS0/PTJ6
157
STATUS1/PTJ7
158
TDO/PTE0
120
/CAS2L/PTE6
116
/CAS2H/PTE3
117
/RAS3U/PTE2
118 /CAS2U/PTE1
119
/CE2A/PTE4
103 /CE2B/PTE5
104
PTE7
94
/RESETM
124
/RESETP
193
PTG0/AUTADA0 135
PTG1/AUTADA1
133
PTG2/AUTADA2
131
PTG3/AUTADA3
130
PTG4 129
/ASEBRKAK/PTG5 128
/ASMDO/PTG6 127
IOIS16/PTG7 126
/WAIT
123
/BACK
121
/BREQ
122
/IRQOUT
160
DRAK1/PTD0 190
DRAK0/PTD1 189
RESTOUT/PTD2 184
WAKEUP/PTD3 182
/DREQ0/PTD4 191
/DREQ1/PTD6 192
/DACK0/PTD5 114
/DACK1/PTD7 115
/RD
88
/WE0/DQMLL
89
/WE1/DQMLU//WE
90
/WE2/DQMUL//ICIORD/PTK6
91
/WE3/DQMUU//ICIOWR/PTK7
92
/WR/RD
93
/CS0/MCS0
96
/CS2/PTK0
98
/CS3/PTK1
99
/CS4/PTK2 100
/CS5//CE1A/PTK3 101
/BS/PTK4 87
CKE/PTK5
105
NMI
7
/CS6//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/IRQ0/PTH0 8
/IRL1/IRQ1/PTH1 9
/IRL2/IRQ2/PTH2 10
/IRL3/IRQ3/PTH3 11
IRQ4/PTH4 12
ADTRG/PTH5 125
PTH6 151
TCLK/PTH7 159
SH7709A
U1
SH-7709A
RB
RA
BUZZER
R40
10K
VCC
R71
100
BUZZER_O
BUZZER_O
BUZZER
DQMUL
DQMUL
DQMUU
DQMUU
BK
BK
VMM
R41
10K
VCC
VDD
AGND
AGND
LCD_D0
LCD_D1 LCD_D2
LCD_D3 LCD_D4
LCD_D5 LCD_D6
LCD_D7 LCD_CS1
LCD_CS2 LCD_/RES
LCD_R/W LCD_D/I
LCD_E BACKLIGHT
RY
10
98
U5C
LM324
R126
100 MOTER_C
B_IN1
B_IN2
B_IN3
B_OUT1
B_OUT2
B_OUT1
B_OUT2
B_IN1
B_IN2
B_IN3
AD1
AD2
BK_IO
BK_IO.SCH
B_OUT1
B_OUT2
B_IN1
B_IN2
B_IN3
AD1
AD2
B_OUT1
B_OUT2
B_IN1
B_IN2
B_IN3
CKE
/WE
/RD
DQMLL
DQMLU
/CAS
/RAS3L
A24
A25
/RST 1
GND 2
VCC3
3
VCC5
4
VCCA
5
U10
LTC1728
VCC
VDD
VCCL
R2
3.4K
R3
3.0K
GND
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
PR2110K
PR22 100
PR23 100
PR24 100
PR25 100
ROM1
R130
10K
C77
0.1uF C78
0.1uF
GND GND
VCC
VMM
U
9
-
-
>
V
AD1
AD2
AD1
AD2
10 11
U4E
74HC14
1213
U4F
74HC14
1011
U9E
74LS05
1213
U9F
74LS05
VCC
GND
1
2JP27
2PIN
R95
10K
L24
BEAD 0805 NB 220
1
2
JP28
2PIN
PE_I
SELECT_I
ERROR_I
PE_I
SELECT_I
ERROR_I
VDD
GND
GND
Q14
HSC945
Q15
HSC945
1
2
3
4
5
6
7
JP12
GAP
_
R137
100
TXD
TXD
L31
0
L30
0
R138100
R139 100
R140 100
C82
0.1u
C83
0.1u C84 0.1u
GND
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/2410M Bar Code Printer
Service Manual
The figure below shows the PCB system area :
MCU
Communication Port
Decoder
System
Print Head
Connector
External
Memory
Connector
Memory
S
y
stem
Option A/D
Convert
Option I/O
Sensor ConnectorCutter System
Power
System
Motor
System
Fig. 3.2 System Block of PCB

12
TTP-248M/2410M Bar Code Printer
Service Manual
3.2 MCU PIN Description

13
TTP-248M/2410M Bar Code Printer
Service Manual

14
TTP-248M/2410M Bar Code Printer
Service Manual

15
TTP-248M/2410M Bar Code Printer
Service Manual

16
TTP-248M/2410M Bar Code Printer
Service Manual

17
TTP-248M/2410M Bar Code Printer
Service Manual