Level
Troubleshooting Chart
Table 4: Level 1 and 2 Troubleshooting Chart
Symptom | Probable Cause | Verification and Remedy |
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1. Telephone will not turn on or stay on. | a) Battery either discharged or | Measure battery voltage across a 50 ohm (>1 |
| defective. | Watt) load. If the battery voltage is <3.25 Vdc, |
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| recharge the battery using the appropriate |
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| battery charger. If the battery will not |
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| recharge, replace the battery. If battery is not |
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| at fault, proceed to b. |
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| b) Battery terminals open or mis- | Visually inspect the battery terminals on both |
| aligned. | the battery and the telephone. Realign and, if |
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| necessary, either replace the battery or refer |
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| to a Level 3 Service Center for the battery |
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| connector replacement. If battery terminals |
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| are not at fault, proceed to c. |
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| c) keypad defective. | Replace the keypad. Temporarily connect a |
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| +3.6 Vdc supply to the battery terminals. |
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| Press and hold the PWR button. If unit turns |
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| on and stays on, disconnect the dc power |
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| source and reassemble with the new keypad. |
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2. Telephone exhibits poor reception or | Connections to or from lower PCB | Check connection between the antenna and |
erratic operation such as calls frequently | defective. | the lower PCB. |
dropping or weak or distorted audio. |
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3. Display is erratic, or provides partial | LCM defective. | Replace the LCM. Verify that the fault has |
or no display. |
| been cleared and reassemble the unit with |
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| the new LCM. |
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4. Incoming call alert transducer audio | Speaker defective. | Replace the speaker as described in the pro- |
distorted or volume is too low. |
| cedures. Verify that the fault has been |
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| cleared and reassemble the unit with the new |
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| speaker. |
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5. Telephone transmit audio is weak. | Microphone defective. | Replace the microphone as described in the |
(usually indicated by called parties com- |
| procedures. Verify that the fault has been |
plaining of difficulty in hearing voice). |
| cleared and reassemble the unit with the new |
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| microphone. |
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6. Receive audio from earpiece speaker | a) Connections to or from lower | Check connection between the antenna and |
is weak or distorted. | PCB defective. | the lower PCB. If the connection is OK, pro- |
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| ceed to b. |
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| b) Speaker defective. | Temporarily replace the speaker with a |
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| known good speaker. Ensure good connec- |
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| tion. Place a call and verify improvement in |
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| earpiece audio. If fault is cleared, reassemble |
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| the telephone with the good speaker. |
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May 30, 2008 | 32 |
