TROUBLESHOOTING
In this section, we look again at what to do if the movement test carried out in this stage does
not go as described. As the arms have been tested previously, we will focus on the operation
of the neck and back servos, as well as the speaker, from which Robi says ‘OK!’
Before dismantling the assembly to check its individual servos, check the other electrical components used in the test.
HEAD/NECK/BACK SOCKET
CHECK THAT THE CABLE IS CONNECTED TO
THE CORRECT SOCKET ON THE CPU
CHECK THAT THE SERVO CABLE IS
SECURELY CONNECTED TO THE CPU
CHECK THAT THE
BATTERY IS CHARGED
Ensure that the back servo
cable’s connector is sitting
securely within its socket.
Remove and replace it carefully
if need be.
The socket farthest from
the micro SD card slot on
the CPU board will hold the
servo cable running from
the back servo.
The test will only run if sufficient
power is received from the
battery, so make sure the battery
is fully charged (see the Close-
Up box earlier in this stage).
INITIAL CHECKS
Neck stand (Stage 53)
Along with the Phillips screwdriver
supplied with Stage 2, you will need
the following:
IF NEITHER THE NECK NOR BACK SERVOS MOVE,
OR IF ROBI DOES NOT SAY ‘OK!’
If neither the neck nor the back servo moves when you start
the test, it is probable that there is a misplaced connection,
so go back and check these. Similarly, if Robi does not say
‘OK!’ at the end of the test, you should check the connection
between the speaker cable and CPU board.
THE BACK SERVO
THE SPEAKER
Follow the assembly of Steps
14-19 of Stage 58 in reverse, and
check the back servo’s connections
carefully. If both were sound,
disconnect it from the neck servo
and check the servo’s ID number
(ID=12), resetting it if necessary.
If Robi does not say ‘OK!’ at the
end of the test, check the connection of the speaker cable to
the CPU – done in Step 15 of Stage 57.
IF ONLY ONE SERVO MOVES
If one servo moves but the other does not, it is likely that one
of the ID numbers has been set incorrectly.
Should you need to disassemble and reset Robi’s neck or back
servos, see Stage 58 (for the back servo, ID=12) and/or Stage
54 (for the neck servo, ID=13).
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