Motorola XT1049, XT1050, XT1053, XT1055, XT1056 Troubleshooting Guide

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V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

Moto X

Field Service

Trouble Shooting Guide

V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

Table of Contents

Section

Title

1.0

1.0 Revision History

2.0

2.0 EE Hardware Profile Overview

3.0

3.0 Snapshots of Antennas

4.0

4.0 Schematic and Component Overlays

5.0

5.0 RF Troubleshooting

5.1.1

5.1.1 CDMA RF Troubleshooting

5.1.2

5.1.2 WCDMA/GSM RF Troubleshooting

5.1.3

5.1.3 LTE RF Troubleshooting

5.2

5.2 GPS Subsystem Troubleshooting

5.3

5.3 BT/WiFi Subsystem Troubleshooting

5.4

5.4 NFC Troubleshooting

6.0

6.0 No Turn On Troubleshooting

7.0

7.0 Display Subsystem Troubleshooting

8.0

8.0 Touch Subsystem Troubleshooting

9.0

9.0 Camera Flash Driver Troubleshooting

10.0

10.0 Audio Subsystem Troubleshooting

11.0

11.0 Miscellaneous Baseband Troubleshooting

V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

1.0 Revision History

Ver

Date

Author

Notes

1.0

07/23/2013

Suresh Sethuraman

Initial document created.

1.1

08/20/2013

Manjeet Bhalla

Updated missing blocks

1.2

10/02/2013

Manjeet Bhalla

Updated Table of Contents and filled in missing sections.

V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

2.0 EE Hardware Profile Overview

Moto X (XT1058)

Bands/modes

GSM 850/900/1800/1900, GPRS,

WCDMA850/900/1900/2100, HSPA+(CAT14)

CDMA 850/1900 + Diversity

LTE band 13 + Diversity

RTR8600(GSM/UMTS/LTE RX/TX function integrated) RTR8605(CDMA RX/TX function integrated)

MMPA including WCDMA 850/2100 and Quad-band GSM PA Module WCDMA900 PA Module WCDMA1900 PA Module CDMA850 PA Module CDMA1900 PA Module LTE B13 PA module

Baseband Chipsets

MSM8960Pro (Baseband processor) PM8921 (power management) WCN9310 (Audio Codec)

Application Chipsets

MSM8960 (dual core 2, 1.5GHz application processor)

Memory (eMMC)

8GB eMMC

Memory (RAM)

2GB LPDDR2 SDRAM

Display

4.3” qHD 540*960 AMOLED

Camera

8 MP w/ flash (rear), VGA (front)

Bluetooth/WiFi

WCN3680

Connectivity

Micro USB

Other

3.5mm headset jack

V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

EE Hardware Profile Overview

○ RF Band Support

V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

3.0 Snapshots of Antennas

1. ATT/Vow/Sprint/USC/TMO/Europe:

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4.0 Schematic and Component Overlays

● Main PCB Overlays and schematics - see service portal for files

● Snapshots of Flex Assemblies

Audio Flex

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Battery/Battery Flex

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Bridge Flex

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Display Flex

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Flash LED Flex

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Front Facing Imager Flex

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Main/Rear Imager Flex

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NFC Flex

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Side Key Flex

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5.0 RF Troubleshooting

5.1.1 CDMA RF Troubleshooting

Objective / Purpose:

● Studying CDMA failures and providing procedure for debugging the failures

● The following tests from RADTEST section of the NTF_Pareto document will be

discussed

Here are the various test cases:

For the Verizon SKU Failure List (Primary, C0/C2): Verizon Primary

For the Verizon SKU Failure List (Secondary, C3): Verizon Secondary

● QC_CDMA_800_C3_RSSI_LCH

● QC_CDMA_1900_C3_RSSI_LCH

● QC_CDMA_1900_C3_RSSI_HCH

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For the Sprint CDMA Failure List (Primary, C0/C2): Sprint Primary

For the USC SKU Failure List (Primary, C0): US Cellular

V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

Verizon CDMA Primary:

Please follow the detection scheme shown below to resolve the issue related to

VERIZON CDMA bands. If one step is not working then go to the next step.

Step 1: Repeat the test. If problem exists, go to the next step.

Step 2: Check if the bottom antenna carrier is for the Verizon or not. If it is Verizon,

003 is printed on the Antenna carrier as shown below:

Figure: Antenna Carrier

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Step 3: if Step 2 does not resolve issue, check if universal contact on the PCB is

damaged. Is it touching the antenna pad? If the contact is twisted or not making

contact, this is a problem. The contact should look like this picture below:

Figure: Antenna clip for CDMA Antenna

V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

Step 4: If step 3 does not resolve the problem check if components C110 is placed

in the circuit

Figure: Component C110

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Step 5: If Step 4 does not resolve the problem check if components L111 is placed

in the circuit. In addition, you may have to check the component under a microscope

to ensure that the body of the part is not cracked.

Figure: Component L111

V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

Step 6: If Step 5 does not resolve the problem check if components L106 is placed in

the circuit

Figure: Component L106

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Step 7: If Step 6 does not resolve the problem check if the ground clips are placed on

the board

Figure: Moto X PCB board with ground clips

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Verizon CDMA Secondary

For factory radiated test failures on the Verizon SKU, for CDMA Secondary Bands

800 and 1900, please do the following:

Step 1: Retest the unit.

Step 2: If the failure persists, check the Antenna 3 universal contact, M170. If it is

missing, misplaced, or damaged, place/replace the part and retest. Also check the

contact pad of Antenna 3 on the diversity antenna carrier for a visible mark where the

contact was touching the pad. If no mark is present, replace the universal contact

M170 and retest.

Figure: Antenna 3 Universal Contact

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Figure: Contact Pad of Antenna 3

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Step 3: If Step 2 does not resolve the issue, check all Antenna 3 matching

components and PIN diode biasing components: C171, L172, C176, C173, C174,

C181, C175, L176, L173, C177, D171, L175, L178, and C179. If any component is

missing, misplaced, or damaged, place/replace the part and retest.

Figure: Antenna 3 Matching Components and PIN Diode Biasing Components

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Step 4: If Step 3 does not resolve the issue, check the PCB grounding clips on the

display side of the PCB: M0010, M0011, M0012, and M0023. If any clip is missing,

misplaced, or damaged, place/replace the part and retest.

Figure: PCB Grounding Clips Near Antenna 3 Matching

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Step 5: If Step 4 does not resolve the issue, check the grounding clip between the

PCB and the audio flex bracket, M0019. If the clip is missing, misplaced, or

damaged, place/replace the part and retest.

Figure: Grounding Clip Between PCB and Audio Flex Bracket

V1.2 Motorola Mobility Inc. Confidential Proprietary 10/02/2013

Step 6: If Step 5 does not resolve the issue, check the screw holding the antenna

carrier to the front housing near the Antenna 3 feed. If the screw is missing or not

fully inserted, place/replace the screw and retest.

Figure: Screw Holding Diversity Carrier near Antenna 3 Feed

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Motorola XT1049, XT1050, XT1053, XT1055, XT1056 Troubleshooting Guide

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