Epson C117001-N Service Manual - Page 141

REPAIR BY UNIT REPLACEMENT, problems by, tension adjustment - test print

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Troubleshooting DEW5tXM+ Service Msnual 5.2 REPAIR BY UNIT REPLACEMENT You can correct most problems by replaang the unit and adiusting the printer when necessary. Refer to Table 5-3, identib the problem, and&n follow the steps in &e flowchart indicated. - Table 5-3. Symptoms and Reference Pages I Symptom I Problem The printer does not operate CIThe carnage does not move. when the wwer is on. QThe POWER LED does not li@t. i Chert I 1 CIThe carriage moves away from home position at Carriage operation is abnormal. power on. CIThe carriage returns to home position correctly, but 2 the printer fails to enter ready mode. 1 Carriage operation is normal, but the self-test is printed incorrectly. CIThe self-testis not printed. Cl Some of the dots are not printed. 3 Printing is normal, but paper Q The printer does not feed the paper at all. feeding is abnormal. QThe printer feeds paper, but the line spacing varies. 4 Control panel operation is abnormal. QWhen the LF button is pressed, no paper is fed. I5 Data sent by the host computer is printed incorrectly. QThe carriage operates normatly at power on and the self-test is printed correctly, but print data from the 6 host computer is not printed cofrectly. Note: Be sure to perform the appropriate adjustments below. 1. When you replace the C117 MAIN board assembly, perform these adjustments: Cl Bidirectional printing adjustment Q Platen gap motor value adjustment 2. When you replace or disassemble the PG motor orPG sensor, perforrnthese adjustments: o Platen gap motor value adjustment CI PG motor backlash adjustment 3. When you replace or disassemble the CR motor, perform the carriage timing belt tension adjustment. 4. When you disassemble the printer mechanism, perform these adjustments: Q Carriage guide shaft parallelism adjustment 0-..,,., Cl Platen angle adjustment D Platen gap motor value adjustment O PG motor backlash adjustment Ci Bidirectional printing adjustment o Carriage timing belt tensicm adjustment Cl Tractor wire spring tension adjustment @ !54 Rev. A

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Troubleshooting
DEW5tXM+
Service
Msnual
5.2 REPAIR BY UNIT REPLACEMENT
You
can correct most
problems by
replaang
the unit
and
adiusting
the printer when necessary.
Refer to Table 5-3,
identib
the problem, and&n follow the steps in
&e
flowchart indicated.
-
Table 5-3. Symptoms and Reference Pages
I
i
Symptom
I
Problem
Chert
I
The printer does not operate
CIThe
carnage does not move.
when the
wwer
is on.
QThe
POWER LED does not
li@t.
1
CIThe
carriage moves away from home position at
Carriage operation is
power on.
abnormal.
CIThe
carriage returns to home position correctly, but
2
the printer fails to enter ready mode.
1
Carriage operation is normal,
but the self-test is printed
CIThe
self-testis not printed.
Cl Some of the dots are not printed.
3
incorrectly.
Printing is normal, but paper
Q
The printer does not feed the paper at all.
feeding is abnormal.
QThe
printer feeds paper, but the line spacing varies.
4
Control panel operation is
QWhen
the LF button is pressed, no paper is fed.
abnormal.
I
5
Data sent by the host
QThe
carriage operates
normatly
at power on and the
computer is printed
self-test is printed correctly, but print data from the
6
incorrectly.
host computer is not printed
cofrectly.
Note:
Be
sure to perform the appropriate adjustments below.
1. When you replace the C117 MAIN board assembly, perform these adjustments:
Cl
Bidirectional printing adjustment
Q
Platen gap motor value adjustment
2. When you replace or disassemble the
PG
motor orPG sensor, perforrnthese adjustments:
o
Platen gap motor value adjustment
CI
PG
motor backlash adjustment
3. When you replace or disassemble the CR motor, perform the carriage timing belt tension
adjustment.
4. When you disassemble the printer mechanism, perform these adjustments:
Q
Carriage guide shaft parallelism adjustment
Cl
Platen angle adjustment
D
Platen gap motor value adjustment
O
PG
motor backlash adjustment
Ci
Bidirectional printing adjustment
o
Carriage timing belt
tensicm
adjustment
Cl
Tractor wire spring
tension adjustment
0
,..
.
-., ,
@
!54
Rev.
A