Troubleshooting Chart - Motorola V235 Service Manual

Level 1 and 2 Service Manual

Troubleshooting Chart

Table 4. 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.
4. Incoming call alert transducer audio
distorted or volume is too low.
6809495A43-C
PROBABLE CAUSE
a) Battery either discharged or
defective.
b) Battery connectors open or
misaligned.
c) Transceiver board assembly
defective.
a) Antenna assembly defective.
b) Transceiver board assembly
defective.
a) Transceiver board connections
faulty.
b) Flip assembly defective.
c) Transceiver board assembly
defective.
a) Faulty alert transducer.
April 03, 2006
VERIFICATION AND REMEDY
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 transceiver board assembly.
Substitute a known good assembly and
temporarily reassemble the unit. Press and
hold 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.
Check to make sure that the antenna pin is
properly connected to the transceiver board
assembly. If connected properly, substitute a
known good antenna. If the fault is still present,
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.
Remove rear chassis assembly from unit,
check general
condition of flexible printed cable (flex). If the
flex is good, check that the flex connector is
fully pressed down. If not, check connector to
transceiver board connections. If faulty
connector, replace the transceiver board
assembly. If connector is not at fault, proceed to
b.
Temporarily replace the flip assembly with a
known good assembly. If fault has been
cleared, reassemble with the new flip assembly.
If fault not cleared, proceed to c.
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.
Replace the alert transducer with a known
good alert transducer. Verify that the fault has
been cleared and reassemble the unit with the
new alert transducer. If the fault is not cleared,
proceed to b.
Troubleshooting
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