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.

Using the checker
11
For the battery bracket
For the front derailleur or rear derailleur
The green indicator
will illuminate
The green indicator
will illuminate
Rear derailleur
connector
Front derailleur
connector
Battery bracket
The green indicators on the electric cable checker and the main checker unit will
illuminate.
Shake the cable during the checking operation to check that the cable is not
damaged.
If the continuity is lost, the indicator on the electric cable checker will turn off and
the red indicator on the main checker unit will illuminate.
* The power will turn off automatically after 10 seconds. If you press the ENTER
switch, the operation will be repeated for another 10 seconds.
Note: If two batteries (main checker unit and battery bracket) are fitted while checking
is in progress, the orange and red indicators on the main checker unit will flash
simultaneously, so if this happens, remove the battery from the battery bracket.

12
Changing the shifting switch direction
* Make the mode selection while the power indicator is turned off or while the battery
has been removed.
Insert the battery into the checker. Check that the orange power indicator illuminates,
and then continue to the next step of making the connections and carrying out the test.
* If the indicator is flashing, the battery cannot be used and must be recharged.
1. Connect the 5-wire connector of the
SM-EW79A to lever connector.
2. Move the mode select switch to the shifting switch direction
change side.
illuminates
OK
Cannot be used
flash

13
3. When the ENTER switch is pressed, the power indicator (orange) will illuminate, and
the judgment indicator (green) and the judgment indicator (red) will flash
alternately.
Transition to
direction change
mode in progress
4. Once the transition to direction change mode is complete, the three indicators on the
main checker unit will alternately indicate the shifting switch which shift gears to the
outside for the left and right ST-7970 levers. The power indicator (orange) will flash.
In addition, the battery level indicator (green) for the SM-EW79A will remain
illuminated.
(Orange)
illuminates
(Orange)
illuminates
Turned off
Indicates the
left ST-7970 lever
Indicates the
right ST-7970 lever
flash
alternately

Changing the shifting switch direction
14
During this mode, press the shifting switch
that you would like to use for shifting
gears toward the outside.
Depending on the input, the outside
indication will change according to the
following pattern.
The directions of the shifting switches will
change and their status will be displayed.
5. Press and hold the SM-EW79A adjustment mode button
to confirm the changed setting.
If an error occurs, the battery indicator will become red
and the mode will be canceled. When the new setting is
confirmed, both adjustment LEDs will illuminate for 2
seconds and will then turn off.
If an error occurs, the battery LED will change from
green to red and then turn off. If this happens, press the ENTER
switch once more to change the setting.
After the change has been confirmed, press the ST-7970 lever
switches and check that the switch directions (direction of
movement of the derailleur) has been changed. If you cancel the direction change
mode without confirming the new setting, the previous setting will be retained.
* If no operation is carried out for one minute, the mode will be canceled
automatically. It is necessary to press the adjustment button as described above in
order to save the changed direction. If it is not pressed, the new setting will not be
saved.
Outside
direction
Outside
direction
Outside
direction
Outside
direction
Outside
direction
Outside
direction
Press
Press Press
Press
Press
Press
Press
Press
LR LR
LR LR
Changing
right
Changing
right
Changing left Changing left
Inside
direction
Inside
direction