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ii TC9830SM Rev. B 7/98 Confidential
FEED ASSEMBLY------------------------------------------------------------------------------------------------------------------ 11
Platen Module------------------------------------------------------------------------------------------------------------------11
24VDC Stepper Motor ------------------------------------------------------------------------------------------------------- 11
Lower Supply Guide and Bi-Cell Sensor --------------------------------------------------------------------------------11
Printhead Latch----------------------------------------------------------------------------------------------------------------11
Functional Description ----------------------------------------------------------------------------------------------------------11
Printhead Locking-------------------------------------------------------------------------------------------------------------12
SUPPLY HOLDER ASSEMBLY-------------------------------------------------------------------------------------------------12
Functional Description ----------------------------------------------------------------------------------------------------------12
CONTROL PANEL ASSEMBLY-------------------------------------------------------------------------------------------------12
Functional Description ----------------------------------------------------------------------------------------------------------12
CHAPTER 3 TROUBLESHOOTING------------------------------------------------------------------- 13
PRELIMINARY CHECK -----------------------------------------------------------------------------------------------------------13
ANALYZING FAILURE DURING POWER UP ------------------------------------------------------------------------------13
EVALUATION OF A 616 ERROR (DOT SHIFTING FAILED)-----------------------------------------------------------13
EVALUATION OF A 704 ERROR (OUT OF SUPPLY)--------------------------------------------------------------------13
EVALUATION OF A 754 ERROR (OUT OF RIBBON)-------------------------------------------------------------------- 14
EVALUATION OF A 755 ERROR (PRINTHEAD OPEN)-----------------------------------------------------------------14
EVALUATION OF A 765 ERROR (PRINTHEAD FAILURE)------------------------------------------------------------- 14
EVALUATION OF THE CONTROL BOARD ASSY. -----------------------------------------------------------------------14
EVALUATION OF COMMUNICATIONS--------------------------------------------------------------------------------------14
GENERAL TROUBLESHOOTING SUGGESTIONS-----------------------------------------------------------------------15
CHAPTER 4 DIAGNOSTICS ---------------------------------------------------------------------------- 19
POWER-UP SELF-TEST --------------------------------------------------------------------------------------------------------- 19
NV RAM ByteTest----------------------------------------------------------------------------------------------------------------19
Version String Mismatch -------------------------------------------------------------------------------------------------------19
System Restart Condition---------------------------------------------------------------------------------------------------19
Printhead Dot Resistance ------------------------------------------------------------------------------------------------------19
TEST LABEL (LEVEL 1) ----------------------------------------------------------------------------------------------------------19
SERVICE DIAGNOSTICS -------------------------------------------------------------------------------------------------------- 20
Accessing Diagnostic Modes-------------------------------------------------------------------------------------------------- 20
Data Dump Mode ----------------------------------------------------------------------------------------------------------------20
Serial Loop Back Test-----------------------------------------------------------------------------------------------------------21
Parallel Port Test-----------------------------------------------------------------------------------------------------------------21
Diagnostics Test Mode----------------------------------------------------------------------------------------------------------21
Performing a Virgin Printer Reset-----------------------------------------------------------------------------------------21
Printing a Test Label ---------------------------------------------------------------------------------------------------------21
CHAPTER 5 TESTS AND ADJUSTMENTS--------------------------------------------------------- 23
SERVICE TESTS ------------------------------------------------------------------------------------------------------------------- 23
CN6 Power Supply------------------------------------------------------------------------------------------------------------23
Continuity Tests ------------------------------------------------------------------------------------------------------------------23
Transformer - Primary Side ------------------------------------------------------------------------------------------------ 23
Transformer - Secondary Side---------------------------------------------------------------------------------------------23
Bridge Rectifier ----------------------------------------------------------------------------------------------------------------23
Head Open Sensor -----------------------------------------------------------------------------------------------------------23
Displaying Machine/Service Totals---------------------------------------------------------------------------------------23
Print Contrast Adjustment------------------------------------------------------------------------------------------------------24
Platen Motor Gear Adjustment ----------------------------------------------------------------------------------------------- 24
Ribbon Tension Adjustment --------------------------------------------------------------------------------------------------- 24
CHECKING SUPPLY QUALITY-------------------------------------------------------------------------------------------------25