Check Method of Causes
Repair Method
Explanation Figures
Cateye Ergociser EC-5000 Service Manual
10
No Display of Cadence when the Pedal is Rotated. (1)
T-2
No Display of Cadence when the Pedal is Rotated. (1)
T-2
Tapping Screw
Cable Connector
Nomal condition: Frequently shifting
between 0V & 5V
Cable Connector
Red Cable
(Terminal 1)
Black Cable
(Terminal 4)
5P Cable
Red Cable
(Terminal 4)
Power Supply Board
Fig.1
5P Connector
[1] Checking the Control Unit
1. Turn off the power of the main unit.
2. Loosen the seven screws on the cover of the control unit to
remove the control unit. (Fig. 1)
3. Remove the cable connector, which is at the tip of the 5P
cable, from the cable inlet at back of the control unit. (Fig. 1)
4. Turn on the power of the main unit.
5. Slowly move the pedal while measuring the voltage across the
terminals 1 and 4 of the cable connector. (Fig. 2)
The Terminal 1 is for plus (+) and Terminal 4 is for minus (-).
[Judgment]
ⓦ
When the voltage frequently changes between approx. 5V
and 0V, this shows that the main unit set is working fine but
that the control unit might be defective. In this case, you
need to take actions as specified in the repair method (a)
as described at the right.
ⓦ
When the voltage does not change as stated above, check
and record the voltage readings. These numbers will be
necessary at later stages as conditions for checks and
[Judgment].
When the voltage changes are found to be abnormal, check the fol-
lowing items:
[2] Checking the 5P Cable
1. Turn off the power of the main unit.
2. Remove the cover of the main unit set.
(See [D-1: Removing the Frame Covers].)
3. Remove the 5P connector at the power supply board. (Fig. 3)
4. Check the short-circuiting by using a tester across the two con-
nectors (Terminals No. 4) across the 5P cable. (Fig. 4)
When there is a short-circuiting, the tester reading will be zero (0).
[Judgment]
ⓦ
When there is no short-circuiting, the 5P cable might be
disconnected.
In this case, you need to take actions as specified in the
repair method (b) as described at the right.
ⓦ
When there is a short-circuiting and the voltage having
been checked during the procedure [1] is approx. 2V to 3V,
the CDC sensor might be defective. In this case, you need
to take actions as specified in the repair method (c) as de-
scribed at the right.
When there is a short-circuiting and the voltage having been
checked during the procedure [1] is 0V or fixed at approx. 5V, pro-
ceed to check [3].
(a) Replace the control unit.
(See [ES-9: Replacing the Control Unit].)
(b) Replace the 5P cable.
(See [ES-2: Replacing the 5P Cable].)
(c) Replace the CDC sensor set.
(See [ES-6: Replacing the CDC Sensor Set].)
Control Unit
Black Cable
(Terminal 4)
Fig.3
Fig.4
Fig.2
The case a short-circuiting is found:0/no short-circuiting:1.
