Motorola E398 GSM Service Manual page 36

Troubleshooting
Table 4. E389/E399 Telephone: Level 1 and 2 Troubleshooting Chart (Continued)
Symptom
6. Receive audio from earpiece speaker is
weak or distorted.
7. Vibrator feature not functioning.
8. Internal Charger not working.
9. No or weak audio when using headset. a) Headset plug not pushed in fully.
36
Probable Cause
b) Transceiver board defective.
a) Connections to or from transceiver
board defective.
b) Earpiece speaker defective.
c) Transceiver board defective.
a) Speaker Module defective
b) Transceiver board defective.
Faulty charger circuit on transceiver
board.
b) Faulty jack on transceiver board.
April 21, 2004
Verification and Remedy
Replace the transceiver board (refer to 1c).
Verify that the fault has been cleared and
reassemble the phone with the new transceiver
board.
Check connection from the earpiece to the
transceiver board. If connection is not at fault,
proceed to b.
Temporarily replace the speaker with a known
good speaker. Ensure good connection. Place a
call and verify improvement in earpiece audio. If
fault is cleared, reassemble the phone with the
good transceiver board. If fault is not cleared,
proceed to c.
Replace the transceiver board (refer to 1c).
Verify that the fault has been cleared and
reassemble the phone with the new transceiver
board.
Replace Speaker Module. If the fault has not
been cleared, proceed to b.
Replace the transceiver board (refer to 1c).
Verify that the fault has been cleared and
reassemble the phone with the new transceiver
board.
Test a selection of batteries in the rear pocket of
the desktop charger. Check LED display for the
charging indications. If these are charging
properly, then the internal charger is at fault.
Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble the phone with the new transceiver
board assembly.
Ensure the headset plug is fully seated in the
jack.
Replace the transceiver board (refer to 1c).
Verify that the fault has been cleared and
reassemble the phone with the new transceiver
board.
E398/E399 GSM
6809480A37-O