Precor C966i Service Manual page 19

8. With a DC voltmeter, measure between TP1 (+8V) and TP3 (DGND) for 8 Vdc and between
TP4 (+5V) and TP3 (DGND) for 5Vdc. See Diagram 5.2.
Diagram 5.2 - Metrics PCA, Front View
TP1 (+8V)
TP3 (DGND)
9. If 5 Vdc is not present on TP4 and 8 Vdc is present on TP1, replace the metrics PCA.
10. If 8 Vdc is not present on TP1 and the upper PCA is illuminating normally, replace the cable
between the upper PCA and the metrics PCA.
11. If you have performed steps 7 - 10 and the metrics PCA still does not illuminate, contact
Precor customer support for assistance.
12. Set the treadmill's on/off switch in the "on" position.
13. With a DC voltmeter, measure between pins 2 and 6 of J1 (ISP) for 5 Vdc and between pins
4 and 5 of J4 (entertainment) for 8 Vdc.
14. If 5 Vdc is not present on J1 and 8 Vdc is present on J4, replace the upper PCA.
15. If 8 Vdc is not present on J4, temporarily replace the upper PCA to power control module
with a known good cable.
16. If the upper PCA illuminates normally, replace the upper PCA to power control module cable
permanently. If the upper PCA still does not illuminate, replace the power control module.
17. If you have performed steps 12 - 16 and the upper PCA still does not illuminate, contact
Precor customer support for assistance.
18. Set the treadmill's on/off switch in the "on" position.
19. If none of the keys on the display are functioning, check the stop switch cable connection to
the upper PCA. If the stop switch is not connected or the stop switch is not functioning, none
of the display keys will operate. This feature insures that the treadmill has a functioning stop
switch when it is in use.
20. If a particular key is not functioning, perform the keyboard test in Procedure 2.1. If the test
verifies that the key is not functioning, replace the display face.
C956i, C966i (Gen 06) Treadmill
TP4 (+5V)
Page 19