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TTP 246M
TSC TTP 246M Service Manual
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17
17
TTP
-246
M/
344
M
Bar Code Printer
Service Manua
l
U15B (74HC123) controls the breaking of U14. U14 is the driver of cutter
’
s DC motor
.
3.
9 Parallel Port
Circuit
Centronics port is SPP mode and one-way
com
munication.
3.1
0 Serial Port
Circuit
U18 (SP232A) is RS232 asynchronous communication driver IC.
U19 is used for industrial long-distance asynchronous communication
；
U19 is optional for
RS
-422/485.
19
21
Table of Contents
Default Chapter
2
Table of Contents
2
1 Foundamentals about the System
4
Printer Overview
4
Front View
4
Rear View
4
Pinter Specification
5
Available Bar Codes
7
2 Supply Specifications
8
Label Specification
8
Ribbon Specification
8
3 Circuit Description
10
PCB Function
10
MCU PIN Description
12
Reset Circuit
14
Memory Circuit
14
Decoder Circuit and Memory Map
15
Print Head Circuit
18
Motor Circuit
19
Cutter Circuit
19
Parallel Port Circuit
20
Serial Port Circuit
20
USB Circuit
21
Gap/Black Mark Sensor
21
Case Open Sensor
22
Ribbon End Sensor
22
Head Open Sensor
23
Peel-Off Sensor
23
Summary of PCB Connectors
24
TTP-246M & 344M PCB Top Side
25
TTP-246M & 344M PCB Bottom Side
26
4 Mechanism
27
Remove Covers, LCD Panel and Lower Front Panel
27
Replacing the All Harness on Main PCB
31
Replacing Power Supply Unit
32
Replacing Belt and Gears
33
Replacing Ribbon Rewind Spindle
36
TTP-246M/344M Bar Code Printer Service Manua L
36
Replacing Ribbon Supply Spindle
38
Replacing Label Supply Spindle
40
Replacing Platen
42
Replacing Stepping Motor
44
Replacing Print Head
45
Replacing Print Head Adjustment Knob
46
Replacing Gap / Black Mark Sensor
48
Replacing Ribbon Sensor
51
Replacing Print Head Lift Sensor
53
Replacing Internal Print Server Module
54
Peeler Kit Installation (Option)
57
Loading Label for Peel-Off Mode
63
Cutter Module Installation (Option)
66
5 Power on Utilities
67
Calibrate Gap/Black Mark Sensor
67
Self-Test
67
Printer Initialization
68
6 Troubleshooting
70
7 Maintenance
72
Update History
73
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TSC TTP 246M Specifications
General
Brand
TSC
Model
TTP 246M
Category
Barcode Reader
Language
English
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