Motorola T193, Service Manual

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6881038B70 July 27, 2001 31
Level III Service Manual Troubleshooting
Troubleshooting Chart
52# Disable sidetone
54# Show service indicator LED (0 - Off, 1 - Red, 2 - Green, 3 - Amber) (flip must be closed)
57# Initialize non-volatile memory
58# Display security code
58xxxxxx# Modify security code
59# Display lock code
59xxx# Modify lock code
60# Display IMEI
980# DCS Mode (PF B95 only)
981# GSM Mode (PF B95 only)
962# PCS Mode (PF C21 only)
99# Display all pixels
Table 3. PF B95 and C21 Telephone: Level II Troubleshooting Chart
SYMPTOM PROBABLE CAUSE VERIFICATION AND REMEDY
1. Telephone will not turn on or stay on. a) Battery either discharged or
defective. 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.
b) Battery terminals open or
misaligned. Visually inspect the battery terminals 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 terminals are
not at fault, proceed to c.
c) Transceiver board assembly
defective. Remove the transceiver 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 transceiver board
assembly. Verify that the fault has been cleared.
2. Telephone exhibits poor reception or
erratic operation such as calls frequently
dropping or weak or distorted audio. Transceiver board assembly defective. 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.
3. Display is erratic, or provides partial or
no display. a) Mating connections to or from
transceiver board faulty. Check general condition of flex and flex
connector if the flex and connector are good,
check that the connector locking tabs are fully
engaged. If faulty connector, replace the
transceiver board assembly. If connector is not
at fault, proceed to b.
b) Transceiver board assembly
defective. 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.
Table 2. Test Commands (Continued)
Test Command Test Function/Name