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Check Method of Causes Repair Method Explanation Figures
EC-1200 EC-1600 EC-3600 EC-3700
Applicable Models:
Cateye Ergociser Series 1000 Service Manual
13
T-2
T-2
Line on CDC Sensor
Power Supply Board
No Display of Cadence (The cadence remains at zero (0) and does not count when the pedal is rotated.)
[1] Checking the Control Unit
1. Turn off the power. Loosen the four screws on the handlebar
stem to remove the control unit.
2. Remove the cable connector which is connected to the back of
control unit.
3. Slowly rotate the pedal while measuring the resistance across
the connector terminals 1 and 2 of the 5P cable. (Fig. 1)
When there is one short-circuiting (resistance becomes
zero) during one rotation of the pedal, the control unit is
defective.
When there is no short-circuiting, proceed to the following check
procedures.
[2] Checking the Main Unit
1. Remove the frame cover. (See the Section D-1 and D-2
"Removing the Frame Covers.")
2. Remove the CN-3 connector on the power supply board. (Fig.
2)
3. Slowly rotate the pedal while checking shortcircuit across the
two terminals of the CN-3 connector by using a tester to see if
there is one short-circuiting during one rotation of the pedal.
(Fig. 3)
If short-circuiting is found, the 5P cable which connects the
power supply board and the control unit is defective.
When there is no short-circuiting, proceed to the following check
procedures.
[3] Check the positional relation between the CDC sensor and the
magnet of the large gear. (Fig. 4)
1. Align the line on the CDC sensor with the center of the CDC
magnet. (Fig. 5)
2. Secure a gap of about 2mm between the surface of the CDC
sensor and that of the CDC magnet. (Fig. 5)
Check if there is any short-circuiting in the CN-3 connector again.
When a short-circuiting is found, the positional relation
between the CDC sensor and the CDC magnet of the large
gear is incorrect.
When there is no shortcircuit, the CDC sensor is defective.
Fig. 1
Fig. 2
Fig. 3
Red Cable
Black Cable
Fig. 4
CN-3 Connector
Line on CDC Sensor
Center of CDC Magnet
Fig. 5
Gap of 2mm between CDC Sensor and CDC
Magnet
No Display of Cadence
Replace the CDC sensor. (See the Section ES-5
"Replacing the CDC Sensor".)
Replace the control unit with a brand new one.
Replace the 5P cable. (See the Section ES-2
"Replacing the 5P Cable.")
Terminal 2
Terminal 1
Red Cable
Black Cable
5P Cable
The case a short-circuiting is found. One zero (0)
is detected during one rotation of the pedal.
The case of no short-circuiting
The case of no short-
circuiting
The case a short-circuiting is
found. One zero (0) is detected
during one rotation of the pedal.
Center of CDC Magnet