C842, C842i, C846, C846i Upright and Recumbent Cycle
Page 64
Procedure 7.12 - Replacing the Display Housing
or Upper PCA
1. For C842, C842i, C846i and C846 version 2 units, skip to step 14. For C846 version 1 units,
continue with step 2.
2. Set the on/off switch in the off position.
3. Use an anti-static wrist strap connected to the cycle’s frame while performing steps 4-9.
4. Remove the screws that fasten the display housing to the display housing backplate.
5. Lift the display housing off of the backplate and disconnect the interconnect cable from the
J1 connector (mounted on the rear of the upper PCA). Remove the hand held heart rate
cable (C846 version 2 only) from the hand held heart rate PCA.
6. Note the orientation of the keypad cable (connected to the J3 connector, see Diagram 6.3)
and disconnect the keypad cable from the upper PCA.
7. Remove the screws that fasten the upper PCA to the display housing. Remove the upper
PCA from the display housing.
Note:
Prom removal in step seven must be performed with the correct prom extraction tool. The use of
any inappropriate tool is likely to damage the prom and render in unusable.
8. Using an appropriate IC extractor tool, remove the prom from the existing upper PCA and
re-install it on the replacement upper PCA.
Diagram 7.19 - Upper PCA, C846 version 1
Prom
J3
Connector
Pin #1
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