Intermec EasyCoder 501 – Service Manual Ed. 7
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Chapter 26 Troubleshooting
Label (ticket) gap or black mark not detected
• Check that the gaps or marks actually pass through the label
stop sensor (lateral alignment) and that both the upper and
lower sensors are free from paper dust. In case of ribbon save
printers, also check that the windows in the upper and lower
guide plates are clean.
• Check that the printer is set up for the type of media in use.
• Perform a few TESTFEED operations to allow the sensor to
autoadjust.
• Set the intensity of the light emitters in the Setup Mode, as
described in the Technical Manual, or in the Test Mode, see
Chapter 25.4.
• Try different settings for the LSS receivers by turning the poten-
tiometer WR-600 on the CPU board.
• If the label stop sensor still does not operate correctly, check the
condition of its cables and that it they are correctly connected
to the CPU board. (Lower sensor to P-600; Upper sensor to
P-601).
• Check also that the level of the LSS signal on P600:pin 1
varies from low (= label gap detected) to high (+4 to 5V, no
gap detected) when a piece of paper is inserted into and subse-
quently removed from the optogap. Finally, verify that +5V is
present on P-600:pin 2.
Printhead lift sensor out of order
• If the printer does not work, although the printhead is lowered,
it could be due to a malfunction of the photoelectric sensor in
the headlift mechanism. If the sensor is defective, or not con-
nected, error condition 1022 “Head lifted” will be indicated at
any attempt of printing a label.
• Check the sensor for dust or foreign objects.
• Check that the sensor’s cable is connected to P-608 on the CPU
board.
26.2 Single Function
Failure, cont.