Service manual

BASIC LEVEL CHECKS AND SELF TESTS: Mechanical and Electrical Checks
68P80401P01-O 5-5
5.5.3 Lockup Test
Use this test to determine if the unit locks up when keys are pressed or when it is powered down.
The Lockup Test time is approximately 6 minutes:
1. Power up the unit.
2. Press End Call to clear display inputs.
3. Press each of the alphanumeric keys to see if the unit responds. If the unit does not respond to a
pressed key, remove the battery to cycle power on.
If the problem persists after several tries, replace the unit.
5.5.4 Battery Connections Test
Use this test to check the battery connections in the unit.
The Battery Connections test time is approximately 5 minutes:
1. Remove the battery cover and battery from the unit.
2. Inspect the battery for physical damage.
If damage is evident, replace the battery.
3. Insert and remove the battery several times to check the battery connections and back plate of
the unit.
If either components are damaged, replace the unit.
4. Check the battery contacts for foreign material. Use a gold contact cleaning pen (see Appendix
A: Ordering Replacement Parts & Kits for part number) to clean the contact area on the battery.
5. Check the battery cover to ensure it fits and attaches properly to the back of the unit. Replace, if
necessary.
6. Use a pencil or similar object to depress the battery contacts. They should spring back to their
original position.
If the battery contacts do not spring back, they are damaged. Replace the unit.
5.5.5 Testing the GPS Receiver
The GPS receiver does not require alignment. The functionality of the receiver can be checked
using the autonomous mode feature.
Equipment Required: A known good i870 unit, or a commercial GPS receiver.
F
CAUTION: Do not use a pencil eraser or similar material to clean the contacts.
If you do, damage can occur to the contacts.