Tally T2265 SprintPro, Maintenance Manual

Page: 76 / 178

4.5
Monitoring of
Thermo-ASIC and
Printhead
After Power On the Thermo-ASIC will be tested. Is there a ASIC bug the display will
show a bitcoded message THS ERROR XXX (XXX = Failure number from 1 trough
16). The message is active approx. 20 s and will be deleted by pressing any key.
Bit 1 = 1 (xxx = 001) low current error
Cable of printhead is broken, coil defect, contact of connector bad
Bit 2 = 1 (xxx = 002) high current error
constant current generator defect, Thermo – ASIC defect
Bit 3 = 1 (xxx = 004) Rref error
Printhead ID wrong, Reference resistor wrong or missing or contact failure
Bit 4= 1 (xxx = 008) Eeprom values wrong
calibrating of printhead not ok., Eeprom defect, Thermo – ASIC defect
Above mentioned failure possibilities might occur as combinations.
Example: xxx = 9; 9 = 1001 binary = failure 1+4
Behavoir in case of failure:
If a THS-ERROR is recognized the ASIC will be switched off by firmware. To make
printout nevertheless possible the print will be stopped shortly at the end of the line to
protect overheating of the printhead.
4.5.1
Calibrating Values
of Thermo-ASIC
and Printhead
(T2170/T2280 only)
By pressing the keys ONLINE and SETUP you will enter the service menue. After
that the display changes as follows:
By pressing PRINT calibrating values will be printed (example):
Print Temp.cal
Back Next
Online
Setup
2 1 3 4
Valid values are 1 trough 30. Value 0 means short
circuit in this needle system, value 31 means a
break within this needle system.
Calibrating value of printhead temperature.
Type of printhead.
Needle 1 to
needle 24
Reference resistor
14
20
...
...
22
4
23
NDK11
(T2170/T2280 only)
Monitoring of Thermo-ASIC and Printhead Testmodes and Troubleshooting
4-14