Procedure 6.3 - Display Does Not Illuminate - Precor C842 Service Manual

Procedure 6.3 - Display does not Illuminate

Note:
In order to conserve battery power when the cycle is not in use, a time out feature is incorporated
in the cycles software. If the cycle is not used (motion not detected by the speed sensor), when in
the program mode, approximately 15 seconds later, the cycle will "power down" even when the
on/off switch is in the "on" position.The bike will "power up" again when pedaling is resumed
(motion detected by the speed sensor). In order to measure voltages in the unit it is necessary to
keep the unit powered up. This can be accomplished either by pedaling on the unit or by
installing the optional external power adapter.
1. On C846 Version 1 units, set the on/off switch in the on position.
2. Pedal on the cycle for a minimum of 5 seconds. If the display does not illuminate proceed
with step 2 for C846 version 1 units or step 12 for C842 and C846 version 2 units and for
C842i and C846i units.
3. Using a DC voltmeter, measure between J1-7 (blue wire) and J1-8 (black wire) on the lower
PCA. If the DC voltage is less than 3.0 volts, replace the battery.
Diagram 6.5 - Lower PCA, C846 version 1
C24 Capacitor
R25 Resistor
C16 Capacitor
J4 Connector
C842, C842i, C846, C846i Upright and Recumbent Cycle
Pin #7
Pin #4
Pin #1
J1 Connector
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