TSC TTP 342 Plus User manual

TTP 243 Plus/ 243E Plus/ 342 Plus
TTP/TDP 244/342
TTP/TDP 244
Service Manual
THERMAL TRANSFER / DIRECT THERMAL
BAR CODE PRINTER

i
TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
Table of Contents
1. FUNDAMENTALS ABOUT THE SYSTEM ..................................................................1
1.1 Features of the TTP-243 Series .................................................................................1
1.2 Model Naming Syntax.................................................................................................1
1.3 Overview ....................................................................................................................2
1.3.1 Front View...........................................................................................................2
1.3.2 Rear View...........................................................................................................3
1.4 Basic Specifications....................................................................................................4
1.5 Effective Print Area.....................................................................................................6
1.6 Available Bar Codes...................................................................................................6
1.7 Various Sensors.........................................................................................................7
2. SUPPLY SPECIFICATIONS.............................................................................................9
2.1 Types of Paper...........................................................................................................9
2.2 Specifications.............................................................................................................9
2.3 Ribbon Sizes and Shapes ........................................................................................11
3. ELECTRONICS ..............................................................................................................12
3.1 Circuit Description ....................................................................................................12
3.2 MCU Pin Description ................................................................................................14
3.3 Reset Circuit.............................................................................................................16
3.4 Memory System........................................................................................................16
3.5 Sensor&Key .............................................................................................................17
3.6 Real-Time Clock Circuit............................................................................................18
3.7 Decode Circuit..........................................................................................................19
3.8 Thermal Head Drive/ Protection and History Control Circuit.....................................21
3.9 24V/5V Converter Circuit..........................................................................................22
3.10 Stepping Motor And DC Motor Driver/ Protection Circuit ........................................23
3.11 Communication (Serial & Parallel Port) Circuit........................................................24
3.12 Cutter Drive Circuit.................................................................................................25
3.13 Cutter & Peel Translate Board................................................................................25
3.14 Mainboard Replacement.........................................................................................26

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
3.15 Cutter, DC Motor, Stepping Motor Driver IC Replacement......................................30
4. MECHANISM..................................................................................................................31
4.1 Cutter Installation .....................................................................................................31
4.2 Print Head Replacement ..........................................................................................32
4.3 DC Motor Replacement............................................................................................34
4.4 Ribbon Rewind Spindle Encoder Replacement ........................................................34
4.5 Felt Fabric Replacement ..........................................................................................36
4.6 Stepping Motor Replacement...................................................................................38
4.7 Black Mark Sensor / Gap Sensor (Receiver) Replacement ......................................39
4.8 Ribbon Sensor (Receiver) Replacement...................................................................39
4.9 Ribbon Sensor (Transmitter) / Gap Sensor (Transmitter) Replacement ...................42
4.10 Platen Replacement...............................................................................................43
5. TROUBLE SHOOTING................................................................................................... 46
5.1 Error Messages........................................................................................................46
5.2 Trouble Shooting......................................................................................................47
5.3 Calibrate the Gap Register.......................................................................................48
5.4 Self-test....................................................................................................................48
5.5 Ram Clear................................................................................................................48
5.6 Diagnosis Operation Procedure................................................................................48
5.7 Testing Sensors .......................................................................................................49
5.8 Cleaning the Print Head ...........................................................................................51

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
1. FUNDAMENTALS ABOUT THE SYSTEM
1.1 Features of the TTP-243 Series
1. This bar code printer prints bar codes, characters, logos, on various types of labels and tickets
by direct thermal or thermal transfer printing.
2 This printer adopts a “BASIC-like” high level programming language to help users programme
the desired label forms with ease.
3. This bar code printer can be connected to a personal computer or an optional LCD keyboard
to execute the programs downloaded in the printer‟s memory. The printer is equipped with the
following standard devices: black mark sensor, peel off module and real time clock.
4. This bar code printer provides a selection of optional features, including cutter module,
memory module, portable LCD keyboard, etc.
5. The user friendly labeling software package is bundled with printer.
1.2 Model Naming Syntax
T T P –2 4 3
(1) (2) (3) (4)
(1) Print method:
TTP –Thermal Transfer Printing
TDP –Thermal Direct Printing
(2) Resolution of print head (DPI)
(3) Maximum print width (Inch)
(4) Maximum print speed (Inch/Sec)

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
1.3 Overview
1.3.1 Front View
Fig. 1.1 Front View
Note: The one difference between TTP model and TDP model is the ribbon mechanism.
Front Panel
Cover Release Button
Top Cover
Operation Panel

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
1.3.2 Rear View
Fig. 1.2 Rear view
DC Power Jack
RS-232 Interface
Centronics Interface
Label
Entrance
(External
Mount Use)
Power
Switch

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
1.4 Basic Specifications
Thermal transfer and direct thermal printing
High dot density printing (203 dots/inch)
Selectable print speeds at 1.5”, 2.0” or 3.0” per second
Supports parallel and serial interface
Maximum media width up to 4.4” (114 mm)
Adjustable label edge guide
International character sets
Print area：TTP-243 Plus/243E Plus：4.09” W x 39”L；TTP-342 Plus：4.09”W x 18”L (without
any file downloaded in the printer memory)
User selectable bar code ratios and heights
Prints on labels or tickets
Equipped with black mark sensor
Equipped with Real Time Clock (243 Plus only)
Comes with self-peeling function (243 Plus only)
Buzzer provided to warn of possible errors (243 Plus only)
Label stock and thermal transfer ribbon are easy to install
Internal label print counter
Self test and hex dump mode
Downloadable fonts from label design software
Electronics/Communication Specifications
Electrical
CPU: Hitachi SH2 7040
TPH: ROHM 4” KF-2004-GC17B
Stepping Motor: Mitsumi
DC Motor: DC24V
Memory:
─DRAM: 2 Mb
─Flash: 2 Mb
Adapter 100~240VAC10%, 50~60Hz
Regulations: CE, FCC,TÜ V-GS
Communications Interface:
Serial port: RS-232C (DB-9) at 2400, 4800, 9600 or 19200 baud rate
─Word Length: 7 or 8 data bits, 1 or 2 stop bits, selectable parity
─Handshaking: XON/XOFF and DSR/DTR
Parallel port: Standard parallel interface
Input Buffer: 60KB
RS-232 Interface Pin Configuration:

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
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

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
1.5 Effective Print Area
Label/Ticket Length
12mm~2286mm
Effective Print
Length
10mm~2284mm
Label/Ticket Width
25mm~103mm
Effective Print Width
23mm~101mm
No Print Area
1mm
1.6 Available Bar Codes
Code 39
Code 93
Code 128 UCC
Code 128, Subsets A, B, and C
Codabar
Interleaved 2 of 5
EAN-8, EAN-13, EAN-128
UPC-A, UPC-E
EAN and UPC with 2 or 5 digits add-on
UPC Shipping container code
Postnet
Maxicode
PDF-417
DataMatrix

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
1.7 Various Sensors
Feed Gap Sensor
The feed gap sensor detects a label gap to locate the starting print position of the next
label. The sensor is mounted 4 mm off the center line of the main mechanism.
.
In case of Label
Black Mark Sensor
The black mark sensor locates the position of label by emitting infrared rays onto the
black mark at the back of the ticket. The sensor is mounted 5.75 mm off the center line
of the ticket roll width on the mechanism.

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
In case of Ticket
The default sensor position is (1) as shown on the figure below. To change to the (2)
position, the customer should notify the manufacturer in advance. There can be only
one position for the sensor. Once the sensor position is agreed upon, it can not be
changed afterwards.
Ribbon End Sensor
The sensor detects the end portion of the ribbon. The ribbon end must be transparent.
Label End Sensor
The sensor detects the end portion of the label.
Peel off Sensor
The sensor detects the backing paper of a label.
Ribbon encoder
The encoder is used to detect if the ribbon is broken.

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
2. SUPPLY SPECIFICATIONS
2.1 Types of Paper
Two types of media are available for TTP-243: label and ticket.
In TTP-243, 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 Specifications
Items
Label
Paper Width
Max.114mm
Min. 25mm
Length (Pitch)
12～2286mm
Paper
Thickness
0.20 mm
Paper Weight
Max 240 g/m2
Max. Roll
Diameter
(1” core)
Inner roll diameter. Max 4.3” (110mm)
External roll diameter. Max 8.4”
(214mm)
Roll Up Method
Print surface wound outside as
standard
Paper Core ID.
25.7±0.3mm
Note:
(1). The width and thickness quoted above are said of the label plus its backing paper.
(2). Likewise, the approval of label entails that of its backing paper.
(3). In the peel off mode, the minimum pitch is 35mm.
(4). In the cutter mode, it is required the paper be wound outside. Otherwise, paper jam
tends to result.
(5). In the cutter mode, the paper thickness is 0.2 mm at maximum, and the paper weight is
100 g/m2at maximum.
(6). Paper shape is as shown on next page.
(7) Tag is 0.2mm in thickness, and is less than 100g/m2in weight.

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
2.3 Ribbon Sizes and Shapes
Item
Specifications
Ribbon shape
Spool type
Ribbon width
Max. 110mm
Min. 40mm
Ribbon winding width
Max. 110mm
Min. 40mm
Leading tape
Polyester film, 3355mm long
End tape
Polyester film (transparent), 2505mm
long
Max. ribbon OD.
67mm
Winding method
Ink surface to be wound outside
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-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
3. ELECTRONICS
3.1 Circuit Description
Fig. 3.1 MCU Circuit Diagram
The above is the MCU circuit diagram.
The main board includes seven system blocks:
A: MCU & Decode System
B. Memory System
C. Motor System (stepping motor, DC motor and cutter block)
D. Print head System
E. Communication System (serial & parallel port block)
F. Sensor & Key System

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
G. Power System
The figure below shows the PCB system area.
Motor
System
Communication Port
Real Time
Clock
Memory
Decoder
System
Print
Head
Cutter
System
Memory
System
External
Memory
Connector
Power
System

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
3.2 MCU Pin Description
Port
I/O
Initial
High
Low
Function
Instruction
PA0
I
Pull Up
RXD0
RXD for RS232
PA1
O
TXD0
TXD for RS232
PA2
I
Pull Up
PA2
RTS for RS232
PA3
O
PA3
CTS for RS232
PA4
O
TXD1
DI for TPH
PA5
O
SCK1
CLK for TPH
PA6
O
Pull Up
Active
/CS2
/CS2
PA7
O
Pull Up
Active
/CS3
/CS3
PA8
I
Active
IRQ2
Power down
PA9
I
Pull Up
Active
IRQ3
USB_INT
PA10
O
Pull Up
Active
/CS0
/CS0
PA11
O
Pull Up
Active
/CS1
/CS1
PA12
O
/WRL
/WRL
PA13
O
/WRH
No use
PA14
O
/RD
/RD
PA15
O
Pull Up
Enable
PA15
/LAT for TPH
PB0
O
A16
A16
PB1
O
A17
A17
PB2
O
/RAS
/RAS
PB3
O
/CASL
/CASL
PB4
O
/CASH
/CASH
PB5
O
RDWR
RDWR
PB6
O
A18
A18
PB7
O
A19
A19
PB8
O
A20
A20
PB9
O
A21
A21
PC0~PC15
O
A0~A15
A0~A15
PD0~PD15
I/O
D0~D15
D0~D15
PE0
O
PWM
Enable
TIOC0A
GAP LEVEL
PE1
I
Pull Up
PE1
KEY3
PE2
I
Pull Up
Enable
PE2
CASE OPEN
PE3
I
Pull Up
Enable
PE3
/STTOBE for Centronic port
PE4
O
PWM
Enable
TIOC1A
DCM for DC motor enable
PE5
O
Pull Up
Enable
PE5
STB1 for TPH
PE6
I
Pull Up
Enable
PE6
DC SENS for DC sensor
PE7
O
Pull Up
Enable
PE7
STB2 for TPH
PE8
I
Pull Up
PE8
KEY2
PE9
I
Pull Up
PE9
KEY1
PE10
O
Pull Up
Enable
PE10
STB3 for TPH
PE11
I
Pull Up
Enable
PE11
CT SENS for cutter sensor
PE12
I/O
Pull Up
PE12
SUSPEND for USB
PE13
O
Pull Up
Enable
PE13
STB4 for TPH
PE14
I/O
PE14
RTC I/O
PE15
I
Pull Up
Enable
PE15
HEAD SENS
PF0
I
PF0
Vdet for TPH Voltage detect
PF1
I
PF1
TM for TPH temperture

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
PF2
I
Enable
PF2
MEM load & Hardware version
PF3
I
PF3
CT DETECT
PF4
I
PF4
PEEL SENS
PF5
I
PF5
RIBBON SENS
PF6
I
PF6
BM SENS
PF7
I
PF7
GAP SENS
NMI
I
Pull Up
NMI
No use
/RESETP
I
Pull Up
Active
/RESETP
/RESET
/WDTOVF
O
/WDTOVF
No use
IRQ0: NO USE
IRQ1: NO USE
IRQ2: POWER DOWN
IRQ3: USB_INT
IRQ4: NO USE
IRQ5: NO USE
IRQ6: NO USE
IRQ7: NO USE
Other define
1. System Crystal is 16 MHz.
2. USB Crystal is 48MHz.
3. RTC Crystal 32.768KHz.
4. MCU mode is mode 1.(16-bit space) ( MD0 is high, MD1 is low. )
5. Clock mode is PLL ON x 4. (MD2 is low, MD3 is High.)

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
3.3 Reset Circuit
Fig. 3.3 Reset Circuit
This is the reset circuit .The TS809CXA IC outputs the system reset signal of “LOW”
when the driving voltage is lower than 4.63V (Typical),U31 NO use.
3.4 Memory System
Fig. 3.4 FLASH ROMS and DRAM Diagram
This is the memory circuit. The U8 & U9 are 2M Byte FLASH ROM and U10 is 2M Byte
DRAM .

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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
3.5 Sensor&Key
Fig. 3.5 Sensor&Key
JP1 is the connector which connects to the LEDs and Keys. The signal of LED is High when
the LED is bright; otherwise, it is low.
JP2 is the connector of the head open sensor. The Head open sensor is a micro switch. the
voltage is High when the print head open; otherwise, it is low.
The signal of the key is “LOW”when the keys is press; otherwise, t is “HIGH”.
P4 is the connector which connects to the block mark sensor.
The block mark sensor is a reflect in sensor. the block mark sensor signal voltage is “HIGH
“when the block mark is detected; otherwise, it is “LOW”.
JP5 is the connector which connects to the gap sensor and the gap emitter level. The gap
level is a emitter source intensity control signal. signal. The gap sensor is a penetrable
sensor. the gap sensor signal voltage is low when the gap is detected; otherwise, it is high.
JP7 is the connector of the HEAD-OPEN sensor. When the printhead open,
The HEAD SENS signal is “High”; When the printhead close, The HEAD SENS Signal
is ”LOW”.
Memory card
connector
Memory card
connector