112   A-Class 
 
Fault Messages (continued) 
Displayed Message  Description  Possible Solution(s) 
TOP OF FORM FAULT 
The printer could not find a 
TOF mark within the 
maximum length setting, 
or TOF was encountered in 
an unexpected place. 
 
;
  When the SENSOR 
TYPE is REFLECTIVE, 
this indication is given 
for Out Of Stock. 
 
Check the following possibilities:
 
•  Calibration may be necessary 
(see Section 3.4); 
 
•  The Media Sensor may need 
adjustment (see Section 3.2); 
 
•  The Media Guide may need 
adjustment (see Section 3.1);
 
•  The Leveling Cam may need 
adjustment (see Section 
5.3.1); 
 
•  The maximum label length 
may need to be increased 
(see Section 4.2.1); or 
 
•  The Media Sensor may need 
to be cleaned (see Section 
5.5.4).  
 
 
 
 
 
 
 
 
 
6.2  Hex Dump Mode 
Hex Dump Mode is a useful diagnostic tool for debugging label formats and hardware 
problems, as received host data strings are printed without interpretation by the printer.  
 
•  To enter Hex Dump Mode, press the MENU Key and select DIAGNOSTICS. Go to HEX 
DUMP MODE then select ENABLED and press the ENTER Key. Exit the menu, saving your 
changes.  
 
  Afterward, HEX DUMP MODE will be displayed and all received data will be printed in 
hexadecimal code (along with the ASCII equivalents); see example below: