Shimano SM-EC79 User manual

English 3 – 24
Dutch 25 – 46
German 47 – 68
French 69 – 90
Spanish 91 – 112
Japanese 113 – 134
Italian 135 – 156
Portuguese 157 – 178
Danish 179 – 200
Swedish 201 – 222
Greek 223 – 244
Finnish 245 – 266
Chinese 267 – 288

3
Names of parts
Checker unit
Electric cable checker
Shifting switch checker
(1) Power indicator (orange)
(2) ENTER switch
(3) Judgment indicator
(green)
(4) Judgment indicator (red)
(5) Shifting switch direction
change mode
(6) Checker mode
(7) Mode select switch
(8) Derailleur connector
(9) Lever connector
(10) Cable receptor
Power supply
continuity check
indicator (green) Connect to
junction A
Switch unit
(1) (5)
(6)
(7)
(10)
(9)
(8)
(2)
(3)
(4)
SM-EC79
INDEX
Gear shifting operation • • • • • • • • • • • • • •
4
Installation • • • • • • • • • • • • • • • • • • • • • • • • • • •
5
Adjustment • • • • • • • • • • • • • • • • • • • • • • • • • • •
6
Other lever operation functions • • • • • •
10
Maintenance
• • • • • • • • • • • • • • • • • • • • • • • • •
11
Gear shifting operation • • • • • • • • • • • • • •
4
Installation • • • • • • • • • • • • • • • • • • • • • • • • • • •
5
Adjustment • • • • • • • • • • • • • • • • • • • • • • • • • • •
6
Other lever operation functions • • • • • •
10
Maintenance
• • • • • • • • • • • • • • • • • • • • • • • • •
11
English

Problem location procedure using the checker
4
Using the checker
The two functions of this checker are to
determine locations of problems and to
change the switch directions.
No problem
Problem
NOTE:
This checker may not be possible to
determine the locations of some types of
problem.
Replace the
derailleur.
Replace the
SM-EW79A.
Replace the
ST-7970 lever.
Replace the
electric cable.
Problem with
derailleur operation
Derailleur (front
derailleur or rear
derailleur) does
not operate
Problem with input
(SM-EW79A/ST-7970
lever) operation
Check the
SM-EW79A.
Check the continuity
in the main electric
cable.

5
Problem with front derailleur or rear derailleur continuity
1. First remove the battery from the battery bracket, and then insert the battery into
the checker. The power indicator will illuminate or flash. (If it illuminates, the battery
can be used; if it flashes, recharge the battery.)
* If there is no response from the checker when the battery is inserted into it, there
may be a problem with the battery.
2. Move the mode select switch to the checker
mode position.
Illuminated
Flashing
Not illuminated

6
No problem
• If the judgment indicator (green)
illuminatesswitch is operated.
Problem - - - - Replace the derailleur.
• If the judgment indicator (red)
illuminates
• If the judgment indicator (green)
illuminates, and then after 1 or 2
seconds the judgment indicator (red)
flashes
• If there is no reaction from the
derailleur after 10 seconds from ENTER
switch input and the orange indicator
illuminates, and the judgment
indicators turn off after 10 seconds
Illuminates green:
Normal
Illuminates red:
Problem
Illuminates green
and flashes red:
Problem
Illuminates orange,
then turn off after
10 seconds:
Problem
3. Disconnect the connector for the rear
derailleur (front derailleur). Insert the
derailleur connector of the checker into the
rear derailleur (front derailleur).
4. Press the ENTER switch on the checker. The check will
start automatically and the judgment will be given.
* To try actual operation, press the ENTER switch several
times while turning the crank arm.

Using the checker
7
Adjustment button
Adjustment LED
Battery LED
SM-EW79A
Junction A
Problem with SM-EW79A + ST-7970 operation
1. Disconnect the connector for the SM-EW79A junction, connect the lever connector of
the checker to the connector from SM-EW79A junction A, and then press the ENTER
switch.

8
< For the left lever > < For the right lever >
2. Before a further 10 seconds have passed, press the shifting switch for the
ST-7970 lever.
If there is no problem, the judgment indicator (green) on the checker will
illuminate. If the green indicator does not illuminate when the switch is
pressed, check the SM-EW79A.
* If the switch is pressed and held, the battery LED of the SM-EW79A will illuminate
green. If no other operation is carried out for 30 seconds after the switch input, the
power will turn off automatically.
Illuminates green:
Normal

Using the checker
9
SM-EW79A check
1. With the checker still connected to (A), connect the switch checker to (B).
2. Press the ENTER switch.
3. Press a switch on the switch checker, and check that the green indicator illuminates.
• Green indicator illuminates
- - - The SM-EW79A is OK. Replace the ST-7970 lever.
• Green indicator does not illuminate
- - - Problem with SM-EW79A. Replace the SM-EW79A.
Connect to the side
which did not
illuminate green.
Check that the green
indicator illuminates.
SM-EW79A
Junction A
(A)
(B)

10
Electric cable continuity check
1. Disconnect all of the rear derailleur, front derailleur and junction A connectors.
2. Connect the electric cable connector (5-wire) to the cable receptor of the checker,
connect the electric cable to the component (rear derailleur connector, front
derailleur connector or battery bracket) that you would like to check, and then press
the ENTER switch on the main checker unit.
* If the switch input is connected, the indicator will remain illuminated while the
switch is being pressed. If the switch is released, a signal will continue to be output
for a further 10 seconds.
* Check in one place at a time. If you try to check two places at once, the indicator
display will not be correct.