BenQ
Rev 1.0
Receiver Troubleshooting and Repair Chart
Rx Symptom
Probable
Cause
Verification and Remedy
a) Antenna
assembly is
defective.
1. Check to make sure that the
antenna is properly touched to the
telephone Main Board pad. If OK,
substitute a known good antenna
assembly.
2. If the default is still present,
proceed to b.
1. Portable
telephone
exhibits poor
reception
and/or
erratic
operation
(such as
calls
frequently
dropping,
weak and/or
distorted
audio, etc.).
b) Defective or
misplaced
telephone Main
Board.
1. Check for appropriate frequencies
and power level gains/losses in the
Rx path.
2. Replace malfunctioning
components if listed in parts list.
Likely fail components are
:
U706,
C608, C609, C625, C634, L601,
and L602.
3. If parts replacement doesn’t correct
the default, replace the SAW filter
U701, U702, or transceiver U601.
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