Troubleshooting - TEC B-470 SERIES Maintenance Manual

5. TROUBLESHOOTING

5. TROUBLESHOOTING
Problems
Power is not turned
ON.
LED or LCD does not
light.
Poor printing.
Printer does not print.
Cause
1. Input voltage to the printer is not within
the rated voltage.
(Check by CN1 on the PS unit.)
2. Output voltage from the printer is not
within the rated voltage.
(Check that the voltage between Pin 4
and Pin 6 (GND) of CN2 on the PS unit
is 27 V.
And check the voltage between Pin 1
and Pin 3 (GND) is 5 V.)
3. CPU PC board is not applied with
voltage.
(Check the voltage between Pin 1 and
Pin 3 (GND) of the CN18 on the CPU
PC board is 27 V.)
4. Failure of CPU PC board.
1. Failure of the LED board/LCD
2. Failure of the LCD/LED harness
3. Failure of the CPU PC board
1. The print paper is of poor quality.
2. Dirty print head
3. The head lever fastens the print head
incompletely.
4. Alignment adjustment of the print head
is improper.
1. Print head failure
2. Connection of the print head connector
is incomplete, a bad contact, or broken
wires.
3. Failure in the rewinding/feeding of the
ribbon.
4. Failure of the CPU PC board
5. Failure of the software
6. Failure of the printer cable
• Replace the power cable or power
inlet.
• Replace the PS unit.
• Replace the power harness.
• Replace the CPU PC board.
• Replace the LED board/LCD.
• Replace the LCD/LED harness.
• Replace the CPU PC board.
• Use the media approved by
TOSHIBA TEC.
• Clean the print head.
• Fasten the head lever completely.
• Re-adjust the head.
• Replace the print head.
• Connect the harness completely,
or replace the harness.
• Replace the ribbon rewind motor,
ribbon feed motor or CPU PC
board.
• Replace the CPU PC board.
• Check the program.
• Replace the printer cable.
5-1
EM18-33011
5. TROUBLESHOOTING
Solution