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