Precor C842 Service Manual page 27

7. Start pedalling, if the error 5 is no longer present, the key board is bad. If the error 5 is still
present, the upper PCA is bad. Replace either the keyboard (display housing) or the upper
PCA as appropriate.
Diagram 6.4 - J3, J4 Connectors, C846 version 1
8. Substitute a known good keyboard (display housing) to determine if the keyboard is
defective. If the keys not function normally, replace the original keyboard (display housing).
If the same key(s) still do not function, replace the upper PCA.
9. If you have performed all of the previous tests and have not been able to locate the trouble,
call Precor customer support.
C842, C842i, C846, C846i Upright and Recumbent Cycle
Keyboard Cable
Page 27