C776i Stairclimber
Page 25
Procedure 6.3 - Upper Display Does Not Illuminate
1.
Remove the left hand, right hand and front cover sections per Procedure XX.
2.
While the C776i is in use, measure between test points TP21 and TP22 for 18.5Vdc and
between TP8 and TP22 for 5 Vdc. See Diagram 6.4.
3.
If either voltage is absent or significantly low, disconnect the data cable from the lower
printed circuit assembly and repeat the voltage measurements in step 3.
4.
If the voltage measurements are still absent or significantly low continue with step 8. If the
voltage measurements are now correct, the cause is either the lower data cable, upper data
cable, mid-point connector or upper printed circuit assembly.
5.
Check the upper data cable, lower data cable and mid-point connector per Procedure 6.1
and if necessary replace the appropriate part.
6.
If the cables and mid-point connector tested good in step 5, replace the upper printed circuit
assembly.
7.
If all of the above test have been performed and the C776i is still not functioning correctly,
call Precor technical. support.
Diagram 6.4 - Lower Printed Circuit Assembly
Data Cable
Load Connections
B
Battery -
3 Phase Gen In
TP22, Gnd
TP8, 5 Vdc