Generic Repair Manual.pdf

Generic Repair Manual

- electrical -

1220-1336 Rev 1

Generic Repair Manual (elect)

This Generic Repair Manual – electrical consists of generic information and is as such a

complementary document to the following product specific repair documents:

• Tests & Calibration - electrical

• Troubleshooting Guide - electrical

• Component Replacement - electrical

Since the content of this Generic Repair Manual is valid for all phone models to be launched within a

foreseeable future, the information to be found in this manual will not be copied to the documents

listed above.

If you for some reason will find a discrepancy between this manual and any product specific document,

the information found in the product specific document should be regarded as the valid source of

information.

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Generic Repair Manual (elect)

CONTENTS

1 Process Flow Chart ........................................................................ 4

2 Setup Go/NoGo Test ...................................................................... 5

2.1 Stand-Alone vs. SERP ........................................................................... 5

2.2 Antenna Coupler vs. Direct Line .......................................................... 5

2.3 Antenna Coupler Testing ...................................................................... 6

2.4 Direct Line Testing................................................................................. 7

2.4.1 Direct Line ....................................................................................................... 7

2.4.2 Direct Line with RF Fixture ............................................................................ 7

2.5 Connections ........................................................................................... 8

2.5.1 Stand-Alone .................................................................................................... 8

2.5.2 SERP................................................................................................................ 8

3 Troubleshooting Directions .......................................................... 9

4 Moisture & Baking ........................................................................ 11

5 PBA Component Finder ............................................................... 12

6 Soldering ....................................................................................... 13

6.1 Lead-Free Soldering ............................................................................ 13

6.2 Temperature Issues ............................................................................. 15

7 Go/NoGo Testing .......................................................................... 16

7.1 Overview ............................................................................................... 16

7.2 Channel Allocation Table .................................................................... 17

7.3 Power Level Allocation Table ............................................................. 17

7.4 Test Limits ............................................................................................ 18

7.5 Attenuation Factors ............................................................................. 18

7.6 Test Sequence – Antenna Coupler..................................................... 19

7.6.1 GSM 850 - Measurements & Test Limits..................................................... 20

7.6.2 GSM 1900 - Measurements & Test Limits................................................... 21

7.6.3 GSM 1800 - Measurements & Test Limits................................................... 22

7.6.4 GSM 900 - Measurements & Test Limits..................................................... 23

7.6.5 UMTS 850 - Measurements & Test Limits................................................... 24

7.6.6 UMTS 1700 - Measurements & Test Limits................................................. 25

7.6.7 UMTS 1900 - Measurements & Test Limits................................................. 26

7.6.8 UMTS 2100 - Measurements & Test Limits................................................. 27

7.7 Test Sequence – Direct Line ............................................................... 28

7.7.1 GSM 850 - Measurements & Test Limits..................................................... 29

7.7.2 GSM 1900 - Measurements & Test Limits................................................... 30

7.7.3 GSM 1800 - Measurements & Test Limits................................................... 31

7.7.4 GSM 900 - Measurements & Test Limits..................................................... 32

7.7.5 UMTS 850 - Measurements & Test Limits................................................... 33

7.7.6 UMTS 1700 - Measurements & Test Limits................................................. 34

7.7.7 UMTS 1900 - Measurements & Test Limits................................................. 35

7.7.8 UMTS 2100 - Measurements & Test Limits................................................. 36

8 Revision History ........................................................................... 37

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Generic Repair Manual (elect)

1 Process Flow Chart

Unit in

1. Unpack and handle the unit according to local instructions.

Software fault found!

No fault found!

Determine

fault

Liquid intrusion

check!

Customer abuse!

Reject!

2. Use the Test Instructions - mechanical to confirm that the

phone is faulty and try to verify customer’s complaint.

Perform those tests needed for confirmation of the failure.

If a software fault or no fault is found, upgrade the software.

If a hardware fault is found, start troubleshooting.

Hardware fault found!

3. If liquid intrusion or other kind of abuse can be established,

the unit must be rejected according to your local instructions.

Fault not repairable

at this service level!

Cause of failure not

found!

Troubleshoot

4. Use the Troubleshooting Guides - mechanical & electrical ,

to determine the cause of failure.

Repair

Fault not repairable

at this service level!

5. Use the Working Instructions - mechanical & Component

Replacement - electrical , to repair the unit.

Parts that can be replaced are found in the Part List -

mechanical and Component Replacement - electrical.

Upgrade software

to latest revision

(if needed)

6. Look for software information in the document Customization.

Upgrade to the latest software revision, if needed, and report

as ’SW Upgrade’.

If no fault has been found, alternatively perform a ’Software

Update Content Refresh’.

Calibration

(if needed)

7. If a repair that requires calibration has been done, then

calibrate the unit using SERP as described in Tests &

Calibration – electrical .

TO BE DONE BY AUTHORIZED SERVICE CENTERS ONLY!

Update with

LabelMake

(if needed)

8. If required, print out and attach a new label as described in the

Working Instructions - mechanical .

Fail!

Test

9. Perform all tests described in the Test Instructions -

mechanical and Tests & Calibration - electrical .

Pass!

10..

Unit out

10. Handle and package the unit according to local instructions.

If no fault has been found, report as ’NTF’.

11.

Repair cannot

be carried out

11. If a failure cannot be found or be repaired at this service level,

choose one of the following alternatives:

- Swap the unit according to the Swap Instructions and

local instructions

- Return the unit to the customer on request

- Send the unit to next level of repair according to local

instructions

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2 Setup Go/NoGo Test

All Go/NoGo tests are based on SEMC approved test instruments to be installed with:

• a SEMC Go/NoGo test script to be downloaded from vendor site

• a locally written Go/NoGo test script

and the test result has to be verified against the Go/NoGo Testing.

Non-SEMC test scripts need to be approved by SEMC!

2.1 Stand-Alonevs.SERP

The handling and control of the test instrument can be done in two ways, Stand-Alone or SERP.

STAND-ALONE

• The test instrument controls the entire testing, and:

- a relatively inexpensive test instrument can be used

- is suitable for service centers not being authorized to perform calibrations

SERP

The test instrument executes the testing but is controlled by the SERP application of a computer, and:

- a rather expensive test instrument must be used

- is suitable for service centers being authorized to carry out calibrations

(no need for a separate Stand-Alone test instrument)

2.2 Antenna Coupler vs. Direct Line

The input readings to the test instruments can be setup in two different ways:

- Antenna Coupler (a radiated test inside a shield box)

- Direct Line (a conductive test from the phone’s external antenna connector, with or without

an RF Fixture, depending on the phone model to be tested).

ANTENNA COUPLER

Testing with an Antenna Coupler is considered to be the best alternative:

- testing can be done on all phones

- the shield box isolates the phone and makes it non-susceptible to exterior interference

- the entire phone is tested

Testing can be done with a fully charged battery or a dummy battery with external power supply

(if the shield box is prepared for this).

However, testing with a fully charged battery is the preferred method, since the presence of a standard

battery may affect the readings in a more accurate way.

DIRECT LINE

Testing with Direct Line implies certain limitations:

- testing can only be done on phones with an external antenna connector

- the phone may be susceptible to exterior interference

- the function of the phone’s internal antenna is not tested

If a Direct Line test says ‘Go’, the phone ought to be tested with an Antenna Coupler and if this test

says ‘NoGo’, there is probably an antenna related problem with the phone.

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