Software Upgrade - Motorola T189 Service Manual

7. Personal telephone will not
recognize/accept SIM card
SYMPTOM
9. Internal Charger not working
10. No / Weak audio when using
headset

6.5 Software Upgrade

a) SIM card defective
d) Logic/RF Board
Assembly
Defective.
PROBABLE CAUSE
a) Batteries faulty
a) Faulty charger circuit on
main
board defective
a) Headset not fully pushed
home
b) Faulty Jack Socket /
Defective PCB
1c). Verify that the fault has been cleared
and Re-assemble
the unit with the new PCB.
Initially check that the contacts on the
card are not
dirty. Clean if necessary, and check if
fault has been
eliminated. If the contacts are clean, insert
a Known
good SIM card into the unit. Power up the
unit and
confirm whether or not the card has been
accepted. If
the fault no longer exists, the defective
SIM card
should be replaced. If the SIM card is not
at fault,
proceed to b.
Replace Logic/RF Board Assembly (refer
to
symptom 1c). Verify that the fault has
been cleared
and re-assemble the unit with the new
PCB.
VERIFICATION AND REMEDY
Replace suspect batteries with known
good items.
Insert charger and ensure battrey charging
icon
flashes if OK, replace batteries if batteries
still do not
charge proceed to b)
Replace Logic/RF Board Assembly (refer
to
symptom 1c). Verify that the fault has
been cleared
and re-assemble the unit with the new
PCB.
Fully ensure the 'click' is felt on the jack
socket. If
still no audio proceed to b)
Replace Logic/RF Board Assembly (refer
to
symptom 1c). Verify that the fault has
been cleared
and re-assemble the unit with the new
PCB.