Epson Mt532 Manual

4-2   MaintenanceRev. A
Confidential
Removing Stains (Except for the Thermal Head)
The areas where the paper is fed will be stained or collect dust after printing for a long time 
because of paper dust and heat sensitive materials contained in the paper. Especially, if paper 
feed rollers, the platen, or the paper detectors are not clean, a malfuncion of paper feeding or 
paper detection may occur. In this case, wipe off stains with alcohol.
CAUTION:
Never use thinner, benzine, trichloroethylene, or...

Rev. AMaintenance   4-3 EU-T532/T542 Technical Manual
Confidential
Inspection
The maintenance and inspection procedures for the printer fall into two categories. One is 
“Daily checks” for the printer user, and the other is “Periodic checks” for someone with more 
technical knowledge. Maintenance and inspection procedures should be carried out by properly 
qualified personnel.
Daily Checks
Make sure the printer is used properly and kept in good repair. If there are any problems, 
replace the printer. The...

4-4   MaintenanceRev. A
Confidential
Lubrication
Lubrication is particularly important in keeping the printer operating properly as long as 
possible. Therefore, lubricate at prescribed intervals, using the correct lubricants.
Lubricant
The performance and durability of the printer are greatly affected by the lubricant applied. 
Therefore, pay careful attention to lubricant specifications, especially for the low temperature 
characteristics. The lubricants for the printer are chosen based on technical...

Rev. AMaintenance   4-5 EU-T532/T542 Technical Manual
Confidential
Note: The lubrication point numbers in the table are the same as those in the lubrication diagrams at the end of this manual.
Lubricant List
Tools
Paper roll 
supply 
module13 Two contact points where the paper roll hold unit 
turnsG-36 Appropriate quantity
14 Contact point where the paper roll tension turns G-36 Appropriate quantity
Cut sheet 
presenter 
module15 Two points where the cut sheet presenter module 
turnsG-36 Appropriate...

4-6   MaintenanceRev. A
Confidential 

Rev. ARepair   5-1 EU-T532/T542 Technical Manual
Confidential
Chapter 5
Repair
Repairs are divided into two levels (A and B) in consideration of the degree of difficulty of 
repair. The person who repairs the printer should perform the proper repair procedures, 
depending on the individual technical knowledge and skills.
Repair Levels
Repair Procedure
When problems occur, check the condition of the printer and locate the cause of the problem as 
outlined in “Troubleshooting Table.” Then repair the unit...

5-2   RepairRev. A
Confidential
Troubleshooting
Use troubleshooting procedures in the table below when problems occur.
Table 5-1 Troubleshooting
Phenomenon Condition Cause Level Where/how to check Procedure
No 
performancePower (24 V) is 
not suppliedPower connector is 
disconnected.A See if the power 
connector is 
connected properly.Connect the power 
connector again.
POWER LED is not 
lit.Fuse (F1) is blown.B Check with a tester if 
the fuse (F1) on the 
control circuit board is 
conductive.·Replace...

Rev. ARepair   5-3 EU-T532/T542 Technical Manual
Confidential
PAPER OUT LED 
is flashing.Self test standby 
stateSelf test is in the 
standby stateA Check if the self test 
printing is completed.Press paper feeding 
SW on the control 
circuit board to 
complete the self 
test when not 
completed.
ERROR LED is 
flashing.
(For the LED 
flashing 
patterns, see 
“Error LED” on 
page 3-12.)Print head high 
temperature 
errorThe head 
temperature has 
reached at 70°C or 
more.A-
-
(When the head is 
cooled...

5-4   RepairRev. A
Confidential
Printing 
operation does 
not work.Nothing is 
printed.(1) The head FFC 
connection 
failureA Check whether the 
head FFC is connected 
properly.Connect the head 
FFC properly.
(2)The head FFC 
signal line is 
broken.A See or check with an 
oscilloscope whether 
there is damage or 
break of the head FFC.Replace the head 
FFC if it is broken.
(3)Head input pulse
failureB
Check with an 
oscilloscope whether 
the input pulse is within 
the specified range.If the input pulse...

Rev. ARepair   5-5 EU-T532/T542 Technical Manual
Confidential
Printing is faint. All printing color is 
faint.Printing density 
setting is set to light. 
(The color sensitivity 
difference 
depending on the 
paper)B·Check the printing 
  density setting of the
  control circuit module.
·Check if the specified 
  paper is used.Change the setting 
of the printing 
density to darken.
All or some part 
of printing is faint.(1)Dirt or foreign 
matter attaches 
to the head 
heating 
elements.A See or check the...