Phase Error Is Too Big - Lenovo S960 Service Manual

LENOVO S960 Cellphone Service Manual

Problem: Phase Error is over the limit in whole-unit test.

Reason: Capacitors in power feeding circuits of PA module and transceiver have dry joint
problems. Or there's short circuit between these capacitors and other resistors.

Troubleshooting:
Phase Error is over the limit.
Check power feeding circuits of PA (U2201) and Transceiver
(U2105).
Replace components
which have dry joint
problems.
Frequency Error is over
the limit.
Re-calibrate.
Check whether X2101 is damaged or has a
dry joint problem.
Replace components which
have dry joint problems.

4.2.3 Phase Error is too big.

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