EPSON GT-7000
Chapter 3
Troubleshooting
Rev. A
24
Table 3-4. “OPERATE” Light does not come on.
Table 3-5. Scanner is not initialized.
Table 3-6. Carriage Unit does not operate
Cause
Step
Checkpoint
Finding
Solution
Connector CN1 on
the power board is
disconnected.
1
Is the connector
CN1 on the power
board
disconnected?
Yes
Connect CN1
properly.
Connector CN101 or
CN102 on the power
board disconnected.
2
Is the connector
CN101 or CN102
on the power board
disconnected?
Yes
Connect CN101 or
102 properly.
Fuse on the power
board has blown out.
3
Has the fuse on the
power board blown
out?
Yes
Replace the fuse.
The power board.is
broken.
4
With the scanner
On, check the
voltage output level
between pins 8/
9(+) and pins 6/7(-)
on the power
board. Is the
v5VDC?
No
Replace the power
board.
Connector CN4 on
the power board is
disconnected.
5
Is the connector
CN4 on the control
board
disconnected?
Yes
Connect CN4
properly.
The control board is
broken.
6
---
---
Replace the control
board.
Cause
Step
Checkpoint
Finding
Solution
Connector CN1 on
the power board is
disconnected.
1
Is the connector
CN1 on the power
board
disconnected?
Yes
Connect CN1
properly.
Cause
Step
Checkpoint
Finding
Solution
Power board
is broken.
1
With the scanner power on,
check the voltage output
level between the Pins 4/
5(+) and Pins 6/7 (-) for
CN101 on the power board.
Is it +24VDC?
No
Replace the power
board.
Carriage
Unit (or CR
move
mechanism)
is broken.
2
• With the scanner upper
case removed, does CR
motor move?
• With the CR motor
removed, does the
carriage unit move
smoothly?
No
Check the carriage
move mechanism
and replace the
corresponding
parts or
disassemble and
assemble the part.
CR Motor is
broken
3
Disconnect the connector
CN6 on the control board,
then using the tester, check
the coil resistance between
Pin2 and 4 and between
Pin1 and 3. Is the resistance
of 2 points about 6.2
Ω?
No
Replace the CR
motor.
If any motor coil is shorted,
check the CR motor drive
circuit in the order below.
1.)Set the tester on Ohms.
2.)Place the (-) lead of the
tester on any of Pins 1,2, 3
or 4 for CN1 on the control
hoard.
3.)Place the (+) lead of the
tester on Pin 6/7 for CN4 on
the control board.
With the scanner off, does
the meter show “
∞
”?
No
Replace the power
board.
Control
board is
broken.
4
---
---
Replace the
control board.
Summary of Contents for GT-7000 Photo
Page 1: ...EPSON EPSON EPSON France S A GT 7000 SERVICE MANUAL ...
Page 2: ...6 59 0 18 RORU PDJH 6FDQQHU EPSON GT 7000 4009736 ...
Page 9: ... PRODUCTDESCRIPTION ...
Page 20: ... OPERATINGPRINCIPLES ...
Page 28: ... TROUBLESHOOTING ...
Page 34: ... DISASSEMBLYANDASSEMBLY ...
Page 54: ... ADJUSTMENT ...
Page 56: ... MAINTENANCE ...
Page 58: ...EPSON GT 7000 Chapter 6 Maintenance Rev A 51 Figure 6 1 Lubrication Points G 2 6 G 2 6 ...
Page 59: ... APPENDIX ...
Page 68: ......
Page 69: ......