Voxtel VS600, Service Manual

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VS600 Service Manual
VOXTEL Technical Documentation 52
7 Troubleshooting
7.1 Level 1 & 2 Troubleshooting Chart
SYMTPOM PROBABLE CAUSE VERIFICATION AND REMEDY
a.)
Battery either
discharged or
defective
Measure battery voltage across a
50ohm load. If the battery voltage is
<3.25 V
dc
, 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 bother the battery and the
handset. Realign and, if necessary,
either replace the battery or refer to
a Level 3 Service Facility for battery
connector replacement. If battery
terminals are not at fault, proceed to
c.
1.Handset will not turn on or
stay on
c.)
rd
ly
defective.
Remove the main board assembly.
Substitute a known good PCB
assembly and temporarily
reassemble the handset. Depress
the PWR button; if handset turns on
and stays on, disconnect the DC
power source and reassemble the
handset with a new main board
own
good FPC (flexible printed circuit).
Main boa
assemb
assembly. If the unit still cannot turn
on, after reassembled with a new
main board, try to replace a kn
a.)
Antenna defective
Check connection between the
antenna and the main board
assembly. If the connection is okay,
substitute a known good antenna. If
the fault is still present, proceed to b.
2. Han
receptio
such as frequently dropping
calls or storted audio.
b.)
Main board
assembly
defective Replace the main board assembly
(refer to 1c). Verify that the fault has
been cleared and reassemble the
unit with the new PCB assembly.
dset exhibits poor
n or erratic operation
di
a.)
Mating
connections to or
from main board
faulty.
Check general condition of FPC and
FPC connector. If the FPC and
connector are good, check that the
LCD module
3. Display is erratic, or
provides partial or no
display.
b.)
LCD module
defective
Substitute a known good LCD
module. Verify that the fault has
been cleared. Next reassemble the
handset.