Troubleshooting Chart - Motorola oC81 Series Service Manual

Level 1 and 2 Service Manual
Table 3. Test Commands (Continued)
Test Command
52#
54#
57#
58#
58xxxxxx#
59#
59xxx#
60#
980#
981#
962#
99#

Troubleshooting Chart

Table 4. Product Family 0C45 Telephone: Level 1 and 2 Troubleshooting Chart
SYMPTOM
1. Telephone will not turn on or stay on.
2. Telephone exhibits poor reception or
erratic operation such as calls frequently
dropping or weak or distorted audio.
3. Display is erratic, or provides partial or
no display.
6809462A54
Disable sidetone
Show service indicator LED (0 - Off, 1 - Red, 2 - Green, 3 - Amber) (flip must be closed)
Initialize non-volatile memory
Display security code
Modify security code
Display lock code
Modify lock code
Display IMEI
DCS Mode (PF B95 only)
GSM Mode (PF B95 only)
PCS Mode (PF C21 only)
Display all pixels
PROBABLE CAUSE
a) Battery either discharged or
defective.
b) Battery connectors open or
misaligned.
c) Main board assembly defective.
a) Antenna assembly defective.
b) Main board assembly defective.
a) Main board connections faulty.
Test Function/Name
Measure battery voltage across a 50 ohm (>1
Watt) load. If the battery voltage is <3.25 Vdc,
recharge the battery using the appropriate
battery charger. If the battery will not recharge,
replace the battery. If battery is not at fault,
proceed to b.
Visually inspect the battery connectors on both
the battery and the telephone. Realign and, if
necessary, either replace the battery or refer to
a Level 3 Service Center for the battery
connector replacement. If battery connectors
are not at fault, proceed to c.
Remove the main board assembly. Substitute a
known good assembly and temporarily
reassemble the unit. Depress the PWR button; if
unit turns on and stays on, disconnect the dc
power source and reassemble the telephone
with the new main board assembly. Verify that
the fault has been cleared.
Check to make sure that the antenna pin is
properly connected to the main board assembly.
If connected properly, substitute a known good
antenna. If the fault is still present, proceed to b.
Replace the main board assembly (refer to 1c).
Verify that the fault has been cleared and
reassemble the unit with the new main board
assembly.
Remove rear housing from unit, check general
condition of flexible printed cable (flex). If the flex
is good, check that the flex connector is properly
locked. If faulty connector, replace the main
board assembly. If connector is not at fault,
proceed to b.
March 21, 2003
Troubleshooting
VERIFICATION AND REMEDY
37