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