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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 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
Page 60
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TTP-248M
Bar Code Printer
Service Manua
l
4. 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
TTP-248M Bar Code Printer Service Manual
1. FOUNDAMENTALS ABOUT THE SYSTEM
Printer Overview
Front View
TTP-248M Bar Code Printer Service Manual 1.2 Pinter Specification
Specification
Environment
Electrical
Communication Interface
TTP-248M Bar Code Printer Service Manual
1.3 Available Bar Codes
Host
9 Pin
25 Pin
1.4 Text Specification
Specification of Fonts
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. SUPPLY SPECIFICATIONS
2.2 Specification
2.1 Types of Paper
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual 2.3 Ribbon Specification
Specification
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
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
TTP-248M Bar Code Printer Service Manual 3.4 Memory System
Fig. 3.4 Memory System
G ND J
V CC
TTP-248M Bar Code Printer Service Manual 3.5 Decoder Circuits
3.6 Memory Address Map
Privileged mode
USE CPLD to decode
TTP-248M Bar Code Printer Service Manual
TTP-248M Bar Code Printer Service Manual
0xA88FFFFF
0xAC000000
0xAC3FFFFF
TTP-248M Bar Code Printer Service Manual 3.7 Firmware Address Map
TTP-248M Bar Code Printer Service Manual 3.8 Power Down Sensor
Fig. 3.6 Power Down Sensor Circuit
Ip k
Vref
3.9 Print Head
Fig. 3.7 Print Head ROHM KF2004-GL41B Print Head Sensor
TTP-248M Bar Code Printer Service Manual
RESET PH
TTP-248M Bar Code Printer Service Manual 3.10 Motor System Circuit
PHASE
STEP
INAR
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
Black Mark Sensor
Fig. 3.10 Black mark/ Gap Sensor Circuit Peel-off Sensor
TTP-248M Bar Code Printer Service Manual
BM E
GAPE
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
TTP-248M Bar Code Printer Service Manual
3.13 Parallel Port Circuit
Fig. 3.16 Parallel Port Circuit
TTP-248M Bar Code Printer Service Manual
ERROR
TTP-248M Bar Code Printer Service Manual 3.14 Cutter Drive System
Fig. 3.17 Cutter Drive Circuit
TTP-248M Bar Code Printer Service Manual 3.15 PIN Switch Circuits
3.16 Connector Circuits
Fig. 3.18 LTC490 and RS232 pin switch
Fig. 3.19 Download boot program to on-board Flash memory pin switch
Fig. 3.21 Memory Card Connector
Fig. 3.22 Cutter Connector Circuit
TTP-248M Bar Code Printer Service Manual
JP33
Fig. 3.23 Stepping Motor Connector
TTP-248M Bar Code Printer Service Manual
STEPPING MOTOR
OUT1
TTP-248M Bar Code Printer Service Manual 3.17 Optional Items Circuits
Fig. 3. Optional Item---Buzzer
10 K
BUZZERO
4. MACHANISM
4.1 Remove the Covers and LCD Panel
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
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
4.3 Replacing the Power Supply Unit
TTP-248M Bar Code Printer Service Manual
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
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
Screws
TTP-248M Bar Code Printer Service Manual
7. Reassemble in the reverse procedures after replacing
6. Replace the Ribbon Rewind Spindle
4.5 Replacing Ribbon Supply Spindle
TTP-248M Bar Code Printer Service Manual
1. Remove the four screws of the Ribbon Supply Spindle
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
4.6 Replacing Label Supply Spindle
TTP-248M Bar Code Printer Service Manual
1. Refer to 4.2 to remove the Mainboard
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
4.7 Replacing Label Rewind Spindle
TTP-248M Bar Code Printer Service Manual
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
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
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
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
3. Replace the Motor
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
4. Reassemble in the reverse procedures after replacing
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
4.12 Replacing Gap/Black Mark Sensor
TTP-248M Bar Code Printer Service Manual
1. Disconnect the wires of Gap/Black Mark Sensor
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
4.14 Replacing Print Head Lift Lever Sensor
TTP-248M Bar Code Printer Service Manual
Curly plastic pipe Screws
5. TROUBLESHOOTING
5.1 Troubleshooting
Cause of Errors
Recovery Procedure
On-Line indicator is
off, error 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
UPDATE HISTORY
TTP-248M Bar Code Printer Service Manual
Content
Date
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