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4. Remove the lamp cap using a flat tip or Phillips head screw
driver.
5. Pull the light bulb assembly to remove.
6. Insert the factory specified replacement lamp assembly.
7. Install the replacement lamp cap supplied with the bulb. Do not
over-tighten.
8. Reconnect the lamp harness connector.
9. Reconnect the battery and close the battery compartment.
10. Apply a new BiliCal tip.
11. Turn the power on.
12. Perform multiple calibrations until the unit accepts calibration.
BiliChek user manual
Removing the lamp cap
Removing the bulb
assembly
Inserting the new lamp