Toshiba B-SV4T SERIES Manual page 69

The printer serial port setting is not correspondent to the PC's setting
Please do the configuration by TPCL commands.
9. Poor print quality
The head maybe dirty. Clean the thermal print head.
Adjust the print density setting.
Ribbon and paper media are not
10. Stepping motor does not feed label
Does stepping motor function normally?
Are U11, and U12 (3717 driver IC) of main PCB ass'y broken?
11. No 5V DC on main PCB ass'y.
Is switching power broken?
Is main PCB ass'y U3 broken? Please replace a new main PCB ass'y .
12. Cutter functions abnormally.
Cutter is not activated
Cutter is broken or the main PCB ass'y is broken. If it still has problem after a new
cutter replaced, the U14 (driver IC) or U5 IC on the main PCB ass'y may be
broken.
13. Black mark can't be detected properly
Please check the position of the black mark. Is the width of black mark too
thin to be detected? The suggested black mark width is 12 mm.
Does the sensor function properly?
Measure the current of pin3 of Q9. It is 5VDC when the black mark is detected;
otherwise it should be 0V DC. If the voltage is correct as above mentioned
and the black mark still can't be detected, CPU may have some problem.
compatible.
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