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TTP 248M service manual TTP-248M Bar Code Printer Service Manual
Models:
TTP 248M
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Troubleshooting
Specifications
Error codes
1 MCU Circuit Diagram
Disconnect the wires of Gap/Black Mark Sensor
TTP-248M Bar Code Printer Service Manual 3.3 Reset Circuit
Remove the screw on the main frame. The Gap/Black Mark Sensor assembly is separated into upper part and lower part
Reassemble in the reverse procedures after replacing
Error
Replacing Print Head Pressure Adjustment Knob
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Image 50
TTP-248M
Bar Code Printer
Service Manua
l
Screws
6. Replace the Ribbon Rewind Spindle.
7. Reassemble in the reverse procedures after replacing.
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Contents
TTP 248M THERMAL TRANSFER / DIRECT THERMAL BAR CODE PRINTER SERVICE
MANUAL
TTP-248M Bar Code Printer Service Manual TABLE OF CONTENT
Service Manual
TTP-248M Bar Code Printer
Printer Overview
TTP-248M Bar Code Printer Service Manual
1. FOUNDAMENTALS ABOUT THE SYSTEM
Front View
Environment
TTP-248M Bar Code Printer Service Manual 1.2 Pinter Specification
Specification
Electrical
Communication Interface
TTP-248M Bar Code Printer Service Manual
9 Pin
1.3 Available Bar Codes
Host
25 Pin
Font
1.4 Text Specification
Specification of Fonts
Width x Length
TTP-248M Bar Code Printer Service Manual
File Head of Font Fixed 32bytes
VF1~4
Decode Table
BF3~4 VF3~4
TTP-248M Bar Code Printer Service Manual
2.1 Types of Paper
2. SUPPLY SPECIFICATIONS
2.2 Specification
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual 2.3 Ribbon Specification
Specification
3.1 MCU
Fig. 3.1 MCU Circuit Diagram
3. CIRCUIT DESCRIPTION
TTP-248M Bar Code Printer Service Manual
Fig. 3.2 System Block of PCB
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual 3.2 MCU PIN Description
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual 3.3 Reset Circuit
Fig. 3.3 Reset Circuit
G ND J
TTP-248M Bar Code Printer Service Manual 3.4 Memory System
Fig. 3.4 Memory System
V CC
Privileged mode
TTP-248M Bar Code Printer Service Manual 3.5 Decoder Circuits
3.6 Memory Address Map
USE CPLD to decode
TTP-248M Bar Code Printer Service Manual
0xAC000000
TTP-248M Bar Code Printer Service Manual
0xA88FFFFF
0xAC3FFFFF
TTP-248M Bar Code Printer Service Manual 3.7 Firmware Address Map
Ip k
TTP-248M Bar Code Printer Service Manual 3.8 Power Down Sensor
Fig. 3.6 Power Down Sensor Circuit
Vref
TTP-248M Bar Code Printer Service Manual
3.9 Print Head
Fig. 3.7 Print Head ROHM KF2004-GL41B Print Head Sensor
RESET PH
STEP
TTP-248M Bar Code Printer Service Manual 3.10 Motor System Circuit
PHASE
INAR
Fig. 3.9 Ribbon Near End Sensor Circuit GAP Sensor
TTP-248M Bar Code Printer Service Manual 3.11 Sensor Circuits
Ribbon Near End Sensor
Black Mark Sensor
BM E
Fig. 3.10 Black mark/ Gap Sensor Circuit Peel-off Sensor
TTP-248M Bar Code Printer Service Manual
GAPE
Fig. 3.13 Print Head Lift Lever Open Sensor Circuit Ribbon End Sensor
Fig. 3.11 Peel-off Sensor Circuit Case Sensor
Fig. 3.12 Case sensor Print Head Lift Lever Open Sensor
TTP-248M Bar Code Printer Service Manual
Fig. 3.15 Serial Port Circuit
3.12 Serial Port Circuit
Fig. 3.14 Ribbon End Sensor Circuit
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual
3.13 Parallel Port Circuit
Fig. 3.16 Parallel Port Circuit
ERROR
TTP-248M Bar Code Printer Service Manual 3.14 Cutter Drive System
Fig. 3.17 Cutter Drive Circuit
Fig. 3.18 LTC490 and RS232 pin switch
TTP-248M Bar Code Printer Service Manual 3.15 PIN Switch Circuits
3.16 Connector Circuits
Fig. 3.19 Download boot program to on-board Flash memory pin switch
TTP-248M Bar Code Printer Service Manual
Fig. 3.21 Memory Card Connector
Fig. 3.22 Cutter Connector Circuit
JP33
STEPPING MOTOR
Fig. 3.23 Stepping Motor Connector
TTP-248M Bar Code Printer Service Manual
OUT1
10 K
TTP-248M Bar Code Printer Service Manual 3.17 Optional Items Circuits
Fig. 3. Optional Item---Buzzer
BUZZERO
TTP-248M Bar Code Printer Service Manual
4. MACHANISM
4.1 Remove the Covers and LCD Panel
1. Open Top Right Side Cover
4. Remove Top Right Side Cover and Top Left Side Cover
TTP-248M Bar Code Printer Service Manual
3. Loosen the three screws on Top Left Side Cover
TTP-248M Bar Code Printer Service Manual
Screw LCD Panel Screw Lower Front Cover
TTP-248M Bar Code Printer Service Manual 4.2 Replacing the Mainboard
Screw
Power Supply Unit
4.3 Replacing the Power Supply Unit
TTP-248M Bar Code Printer Service Manual
Two screws Screws
1. Refer to 4.3 to remove the Power Supply Unit
4.4 Replacing the Ribbon Rewind Spindle
TTP-248M Bar Code Printer Service Manual
5. Loosen the three screws on the Cam Spindle Support Plate
TTP-248M Bar Code Printer Service Manual
4. Remove the E-ring of pulley. And then, remove the pulley
Screws
6. Replace the Ribbon Rewind Spindle
TTP-248M Bar Code Printer Service Manual
7. Reassemble in the reverse procedures after replacing
1. Remove the four screws of the Ribbon Supply Spindle
4.5 Replacing Ribbon Supply Spindle
TTP-248M Bar Code Printer Service Manual
2. Remove the shaft bearing 3. Replace the Ribbon Supply Spindle
TTP-248M Bar Code Printer Service Manual
4. Reassemble in the reverse procedures after replacing
1. Refer to 4.2 to remove the Mainboard
4.6 Replacing Label Supply Spindle
TTP-248M Bar Code Printer Service Manual
2. Remove the three screws of the Label Supply Spindle
TTP-248M Bar Code Printer Service Manual
5. Reassemble in the reverse procedures after replacing
1. Refer to 4.3 to remove the Power Supply Unit
4.7 Replacing Label Rewind Spindle
TTP-248M Bar Code Printer Service Manual
2. Remove the E-ring and the pulley of the Label Rewind Spindle
5. Replace the Label Rewind Spindle
TTP-248M Bar Code Printer Service Manual
6. Reassemble in the reverse procedures after replacing
2. Release the Print Head Lift Lever
TTP-248M Bar Code Printer Service Manual 4.8 Replacing Platen
1. Refer to 4.1 to remove the Top Right and Left Side Covers
3. Remove the screw and the Stripper/Rewind Plate
6. Remove the Platen and Left Shaft Bearing
TTP-248M Bar Code Printer Service Manual
7. Reassemble in the reverse procedures after replacing
2. Disconnect the harness from the Motor
TTP-248M Bar Code Printer Service Manual 4.9 Replacing Motor
1. Loosen the four fixing screws on the Motor
3. Replace the Motor
TTP-248M Bar Code Printer Service Manual
4. Reassemble in the reverse procedures after replacing
1. Remove the screws on the Print Head
TTP-248M Bar Code Printer Service Manual 4.10 Replacing Print Head
4. Reassemble in the reverse procedures after replacing
2. Disconnect the two Printer Harnesses 3. Replace the Print Head
1. Open the Right Side Cover and Right Side Plate
4.11 Replacing Print Head Pressure Adjustment Knob
TTP-248M Bar Code Printer Service Manual
5. Remove A.B.C.D in order 6. Loosen M4 screw, knob E and F
TTP-248M Bar Code Printer Service Manual
7. Reassemble in the reverse procedures after replacing
1. Disconnect the wires of Gap/Black Mark Sensor
4.12 Replacing Gap/Black Mark Sensor
TTP-248M Bar Code Printer Service Manual
2. Refer to 4.8 to remove the Stripper/Rewind Plate
TTP-248M Bar Code Printer Service Manual
5. Remove the screw on the main frame. The Gap/Black Mark Sensor assembly is separated into upper part and lower part
TTP-248M Bar Code Printer Service Manual
7. Reassemble in the reverse procedures after replacing
Curly plastic pipe Screws
4.14 Replacing Print Head Lift Lever Sensor
TTP-248M Bar Code Printer Service Manual
Cause of Errors
5. TROUBLESHOOTING
5.1 Troubleshooting
Recovery Procedure
5.2 Calibrate Gap/Black Mark Sensor
On-Line indicator is
off, error indicator is
Carriage open
5.4 DRAM Clear
TTP-248M Bar Code Printer Service Manual 5.3 Self-test
5.5 Diagnosis Operation Procedure
TTP-248M Bar Code Printer Service Manual 5.6 Cleaning Print Head
Content
UPDATE HISTORY
TTP-248M Bar Code Printer Service Manual
Date
Corporate Headquarters