Troubleshooting - Toshiba B-852-R Series Maintenance Manual

4. TROUBLESHOOTING

4. TROUBLESHOOTING
Problems
Power does not
turn ON.
LED or LCD does
not light.
Poor printing
Printer does not
print.
Dot missing
Blurred print
Ribbon wrinkle
Cause
1. Input voltage to the printer is not
within the rated voltage.
2. Output voltage from the printer is not
within the rated voltage.
3. No voltage to the MAIN PC board.
4. Failure of MAIN PC board.
1. Failure of the panel PC board or
operation panel
2. Failure of the operation panel
harness
3. Failure of the MAIN PC board
1. Poor media quality.
2. Dirty print head
3. The print head block is not set
completely.
1. Print head failure
2. Connection of the print head
connector is incomplete, a bad
contact, or broken elements.
3. Failure in rewinding/feeding of the
ribbon.
4. Failure of the MAIN PC board.
5. Failure of the software
6. Failure of the printer cable.
1. Broken print head element
2. Broken print head cable wires
3. Failure of the MAIN PC board
1. Poor media quality.
2. Dust is on the media.
1. Poor ribbon quality.
2. Ribbon is not rewound or fed
smoothly.
Replace the power cable or power
inlet.
Replace the PS unit.
Check if the power harness is
connected to CN8 on the MAIN PC
board correctly.
Replace the power harness or Power
Supply Unit.
Replace the MAIN PC board.
Replace the panel PC board or
operation panel.
Replace the operation panel harness.
Replace the MAIN PC board.
Use the media approved by
TOSHIBA TEC.
Clean the print head.
Close the print head block
completely.
Replace the print head.
Connect the harness completely, or
replace the harness.
Replace the ribbon rewind motor,
ribbon feed motor or MAIN PC board.
Replace the MAIN PC board.
Check the program.
Replace the printer cable.
Replace the print head.
Replace the print head harness.
Replace the MAIN PC board.
Use only TOSHIBA TEC-approved
media.
Clean the print head and remove any
dust from the media.
Use only TOSHIBA TEC-approved
ribbon.
Replace the ribbon rewind motor or
ribbon feed motor.
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4. TROUBLESHOOTING
Solution