Check Method of Causes
Explanation Figures
Repair Method
Cateye Ergociser EC-5000 Service Manual
9
Fig.3
No Display on Control Unit after Power ON. (Back light turns on.)
T-1-2
No Display on Control Unit after Power ON. (Back light turns on.)
T-1-2
Control Unit
Tapping Screw
Cable Connector
5P Connector
[1] Checking the Control Unit
1. Turn off the power of the main unit.
2. Remove seven tapping screws at the cover of control unit, and
detach the control unit. (Fig. 1)
3. Disconnect the cable connector, which is at the tip of the 5P
cable, from the cable inlet at the back of the control unit. (Fig.
1)
4. Connect the 5P cable to the new control unit, and install to the
control unit cover.
5. Turn on the power of the main unit, and check the display.
[Judgment]
ⓦ
When the display works in the above procedures, the previ-
ous control unit might be defective. In this case, you need
to take actions as specified in the repair method (a) de-
scribed at the right.
[2] Checking the 5P Cable
1. Remove the cover of the main unit set.
(See [D-1: Removing the Frame Covers].)
2.
Remove the 5P connector at the power supply board. (Fig. 2)
3. Check the short-circuiting by using a tester across the two con-
nectors of the 5P cable (across two Terminal No. 3s). (Fig. 3)
If the two connectors are short-circuited, the tester reading will
be zero (0).
[Judgment]
ⓦ
When a short-circuiting is found, the power supply board
might be defective. In this case, you need to take actions
as specified in the repair method (b) described at the right.
ⓦ
When there is no short-circuiting, the 5P cable may be dis-
connected.
In this case, you need to take actions as specified in the
repair method (c) described at the right.
(a) Replace the control unit.
(See [ES-9: Replacing the Control Unit].)
(b) Replace the power supply board.
(See [ES-3: Replacing the Power Supply Board].)
(c) Replace the 5P cable.
(See [ES-2: Replacing the 5P Cable].)
Power Supply Board
The case a short-circuiting is found:0/no short-circuiting:1.
Black Cable
(Terminal 3)
Red Cable
(Terminal 3)
5P Cable
Fig.1
Fig.2
