Troubleshooting Chart - Motorola V6 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.
5. Telephone transmit audio is weak.
(usually indicated by called parties
complaining of difficulty in hearing voice).
6. Receive audio from earpiece speaker is
weak or distorted.
PROBABLE CAUSE
a) Battery either discharged
or defective.
b) Battery connectors open
or misaligned.
c) Transceiver board
assembly defective.
d) keyboard assembly
failure.
a) Antenna assembly
defective.
b) Transceiver board
assembly defective.
a) Transceiver board
connections faulty.
b) Flip assembly defective.
c) Transceiver board
assembly defective.
Faulty transceiver board
assembly.
a) microphone obstructed
by user while holding the
phone
b) Microphone defective.
c) Transceiver board
defective.
a) Connections to or from
transceiver board assembly
defective.
October 26, 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.
Forward to an authorized level 3 service center.
Replace the keyboard assembly. Temporarily connect
a +3.6 Vdc supply to the battery connectors. Press and
hold the PWR button. If unit turns on and stays on,
disconnect the dc power source and reassemble with
the new keyboard assembly.
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.
Forward to an authorized level 3 service center.
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.
Forward to an authorized level 3 service center.
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.
Verify transmit audio quality. If transmit audio quality is
still weak and microphone is not obstructed, proceed
to b.
Replace the microphone as described in the
procedures. If fault is not cleared, proceed to c.
Forward to an authorized level 3 service center.
Gain access to the transceiver board assembly as
described in the procedures. Check flex and the flex
connector from the flip assembly to the transceiver
board assembly. If flex is at fault, replace flip assembly.
If flex connector is at fault, proceed to d. If connection
is not at fault, proceed to b.
Troubleshooting
33