Epson TM-U675 - Page 14

1-2 Troubleshooting Rev.D
Confidential
Ribbon won’t feed. 1. Replace the ribbon cassette. (See page I-8.)
2. Check sprocket and gears for paper particles.
3. Check the carriage motor and gears. (See page 1-11.)
4. Replace the main circuit board. (See page 2-96.)
Unevenness occurs in the concentration of
the print.
1. Replace the ribbon cassette. (See page I-8.)
2. Adjust the platen gap. (See page 3-8.)
There is ink smudging on the print surface. 1. Check for paper residue around the print head unit.
2. Adjust the platen gap. (See page 3-8.)
Paper jams Remove the jammed paper by following the directions in
“Removing Paper Jams” on page 1-19.
Roll paper feed failure 1. Check that the roll paper is inserted correctly. (See page I-3.)
2. Check the paper feed motor. (See page 1-11.)
3. Check the J/S change solenoid. (See page 1-11.)
4. Replace the main circuit board unit. (See page 2-96.)
Slip paper/validation paper feed failure 1. Check that the slip paper/validation paper is inserted correctly.
(See page I-10)
2. Check the paper feed motor. (See page 1-11.)
3. Check the J/S change solenoid. (See page 1-11.)
4. Replace the main circuit board unit. (See page 2-96.)
Roll paper take-up failure 1. Check that the roll paper is inserted correctly. (See page I-3.)
2. Check that the take-up assembly is installed correctly into the
printer. (See page I-6.)
3. Check that the take-up belt is attached correctly.
(See page 2-112.)
4. Check the paper feed motor. (See page 1-11.)
5. Check the J/S change solenoid. (See page 1-11.)
6. Replace the main circuit board. (See page 2-96.)
The printer won’t recognize when slip paper
is inserted.
1. Clean away dirt around the slip B. O. F. detector assembly or the
slip T. O. F. detector assembly. (See page B-2.)
2. Replace the slip B. O. F. detector assembly. (See page 2-63.)
3. Replace the slip T. O. F. detector assembly. (See page 2-77.)
4. Replace the main circuit board unit. (See page 2-96.)
The printer won’t recognize when validation
paper is inserted.
1. Clean away dirt around the validation detector assembly. (See
page B-2.)
2. Replace the validation detector assembly. (See page 2-63.)
3. Replace the main circuit board unit. (See page 2-96.)
Roll paper semi-auto loading paper feed
failure
1. Check that the roll paper is inserted correctly. (See page I-3.)
2. Remove paper residue and dirt from the inside the paper feed
frame assembly.
3. Check the paper feed motor. (See page 1-11.)
4. Check the J/S change solenoid. (See page 1-11.)
5. Replace the main circuit board unit. (See page 2-96.)
Table1-1 Symptoms and Checkpoint
Symptom Checkpoints (by Priority)