Maintenance Step 4; Maintenance Working Flow; Overview; Case 1: All Self Tests Passed - Nokia c2-00 Service Manual

RM-704
RF Troubleshooting

Maintenance step 4

In Maintenance step 4 the phone will be assembled and a short test in signalling mode in order to verify that
the assembled phone with full mechanic and antenna can pass finial UI requirements in Normal Mode, i.e.
Signalling Mode and if the phone is able to do a voice call.
Purpose of step 4:
• Finial verification step using normal mode of the full assembled phone before sending it back to the
customer;
• To verify the phone is working in live network.

Maintenance working flow

Overview

The Maintenance step 1 is the maintenance step where all self-tests are performed on the fully assembled
MS. In some case the Self-tests will detect failure i.e. tell the maintenance operator where to debug. However
in other cases the Self-test will not detect any failure however this doesn't mean that a failure is present. In
order to locate the area of the failure it's recommended to run verification test (Maintenance step 3) in order
to give the Maintenance operator better hint where to trouble shoot.
Below is the different working flow described depending on outcome of the different Self-tests.

Case 1: All Self Tests Passed

Below is the working flow for the case where all Self-test passed illustrated.
The phone passes all the Self-tests meaning that the Self-Test was not able to detect any failure – however
it must be assumed that a failure is present.
In order to locate the area of the failure, the RF verification in Maintenance step 3 need to be executed. The
verification step will highlight in which area the failure is present and where to start to troubleshoot.
Debugging and troubleshooting are described in the Maintenance Step 2.
After the troubleshooting i.e. finding and replacing the failing components(s) the next step is to re-tune
(calibrate) and do RF verification (Maintenance step 3). This is done in order to secure that all failures have
been removed and no further failures are present. The MS passes needs to pass all RF related test. Finally the
MS is assembled in Maintenance step 4 and verified in normal mode.

Case 2: X-Tal, Antenna detection and FEM ID Self-Test Failed

Below is the working flow illustrated for the case where all Self-test fails the X-Tal, Antenna detection or FEM
ID Self-test in the Maintenance step.
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