Motorola A780 Service Manual - Page 39
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Level 1 and 2 Service Manual
Table 3. A780 Telephone: Level 1 and 2 Troubleshooting Chart (Continued)
SYMPTOM
10. Internal Charger not working.
11. Real Time Clock resetting when
standard battery is removed.
12. No or weak audio when using headset. a) Headset not fully pushed home.
Programming: Software Upgrade and Flexing
6809488A90
PROBABLE CAUSE
Faulty charger circuit on transceiver
board assembly.
Lithium button cell in the display board
may be depleted.
b) Faulty connector socket on
transceiver board assembly.
Contact your local technical support engineer for information about equipment and
procedures for flashing and flexing.
September 20, 2004
VERIFICATION AND REMEDY
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 unit with the new transceiver
board assembly.
Refer service to a Level 3 service center for
replacement.
Ensure the headset plug is fully seated in the
connector socket. If fault not cleared, proceed to
b.
Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble the unit with the new transceiver
board assembly.
Troubleshooting
37