Motorola T2260, Service Manual

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71 4/3/01
Troubleshooting
Symptom Probable Cause Verification and Remedy
1. Phone will not turn on
or stay on.
a) Battery either discharged or
defective.
1. Measure battery voltage across a 50 ohm (>1 Watt) load.
2. If the battery voltage is <3.4 V DC, recharge the battery
using the appropriate battery charger.
3. If the battery will not recharge, replace the battery.
b) Battery connector open
or misaligned.
1. Visually inspect the battery connectors on both the battery
pack and the transceiver, including the solder connections
from the battery connector to the main PC board.
2. Realign the contacts or, if necessary, replace either the bat-
tery or battery connector.
c) Keypad membrane defec-
tive.
1. Replace the keypad membrane with a known good part.
2. Temporarily c6 V DC to the battery contacts.
3. Depress the PWR button; if unit turns on and stays on, dis-
connect the power source and reassemble the phone with the
new keypad membrane.
d) Keypad board defective. 1. Replace keypad board assembly with a known good assem-
bly.
2. Temporarily c6 V DC to the battery contacts.
Depress the PWR button.
3. If the units turns on and stays on, discon-nect the power
source and reassemble the phone with the new keypad board
assembly.
e) RF/Audio-Logic Board
defective.
1. Remove the RF/Audio-Logic Board. Substitute a known
good board.
2. Temporarily c6 V DC to the battery contacts.
3. Depress the PWR button; if unit turns on and stays on, dis-
connect the power source and reassemble the phone with the
new RF/Audio-Logic board and re-test phone.
2. Phone exhibits poor
reception and/or erratic
operation (such as calls
frequently dropping, weak
and/or distorted audio,
etc.)
a) Defective antenna or
damaged antenna connector.
b) Defective RF/ Audio-Logic
Board.
1. Make sure the antenna shaft ferrule is screwed into the
antenna socket.
2. Make sure pin on antenna coil is seated in antenna connec-
tor socket.
3. Replace the antenna with a known good antenna.
Replace the transceiver board (refer to symptom 1c Verifica-
tion and Re edy.)