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Figure 4-2 Pcba Components Diagram 2 - Huawei U8815 Maintenance Manual

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U8815

Maintenance Manual

Figure 4-2 PCBA components diagram 2

Failure caused by

damage to

vibration failure

Failure caused by

damage to

charging

charging failure

Failure caused by

damage to

RF low-noise

amplifier: UMTS signal

failure

Issue 1.0 (2012-02-13)

Failures caused by

damage to

the

Failure caused by

U4101RF low noise

damage to

the

amplifier

GPS

spring of the J4101

function failure

GPS

antenna: GPS

function failure

Failure caused by

Failure caused by

damage to

the spring

damage to

of the J4302 UMTS

32.768 kHz crystal

diversity

antenna:

resonator: power-on

UMTS signal failure

failure

the

motor:

the U1001

chip:

the U4301

Failures caused by

damage to

the J1101

BTB connector–

FEMALE-24: charging,

USB data

communication, and

call transmission

failures

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Failures caused by

damage to

the J1102

BTB connector–

FEMALE–24: failures of

proximity light, speaker,

and power key

the X301

Failure caused by

damage to

the J1601

card holder connector–

UIM card

holder:

failure to identify a

UIM card

Failure caused by damage

to

the U201power

management chip

power failure that prevents

the components from

working properly

4 PCBA Components

Failure caused by

Failure caused by

damage to

damage to

the J1201

BTB connector–24

BTB connector–

(J1902): camera

FEMALE

–10: touch

failure

panel failure

Failure caused by

damage to

BTB connector–

FEMALE–24

LCD display failure

Failures caused by

damage to

antenna springs of the

J4101BT and

failures of BT and Wi-

Fi functions

Failure caused by

damage to

holder connector

Micro SD

failure to identify a

MicroSD card

Failures caused by

damage to

dual-channel RF

transmission and

receiving

signal, weak signal,

Failures caused by

registration failure, and

damage to

the J1501

GPS failure

holder connector–the

battery

connector:

power-on and

charging failures

Failures caused by GPS failure

and damage to

connector: no signal, weak

signal, and registration failure

PM8029:

the J1902

the J1201

(J1201):

the

WIFI:

the J1302

Receptacle:

the U3901

RTR6285A: no

the J3201 RF

7

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Troubleshooting