Monarch 9820 Service Manual page 3

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
ii TC9830SM Rev. B 7/98 Confidential