Multiphone PAP3500_DUO Service Manual - Prestigio Cyprus ...

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Prestigio Multiphone PAP3500DUO




Service Manual



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1

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PAP3500

Service Manual

V
ersion number
: V1.0









































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Service Manual



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Contents

Contents
................................
................................
................................
................................
...........................

2

1.
PAP3500
Overview

................................
................................
................................
................................
.....

3

1.1.

PAP3500
Mobile Phone Brief Introduction

................................
................................
..............

3

1.2.

Main board Component Distribution Map

................................
................................
..............

4

2. Radio Frequency Part

................................
................................
................................
...............................

6

2.1. Launch Part Brief Introduction

................................
................................
................................
.........

6

2.4. Receive Maintain Block Diagram

................................
................................
................................
....

9

2.5. Common radio
-
frequency signal oscillogram

................................
................................
................

10

3.
Baseband part

................................
................................
................................
................................
..........

14

3.1.
Baseband overview

................................
................................
................................
........................

15

3.2. Minimum system

................................
................................
................................
............................

15

3.3. voice frequency decode

................................
................................
................................
..................

19

3.5.MIC+earp
hone

................................
................................
................................
................................

20

3.6.BT/FM circuit

BT

WIFI

GPS


................................
................................
.............................

22

3.7.WIFI circuit

................................
................................
................................
................................
.....

22

3.9.GPS circuit

................................
................................
................................
................................
......

25

4.0. Light and

distance sensor

................................
................................
................................
...............

26

4.3.3D acceleration transducer

................................
................................
................................
..............

26

4.4. LCM circuit

................................
................................
................................
................................
....

27

4.5. Common Baseband maintain case

................................
................................
................................
..

27

3.7.1NAND FLASH programming does not download

................................
................................
........

27

3.7.2 Detection and Maintenance Flow Char
t of No download malfunction

................................
........

28

5.
Reference for maintenance

................................
................................
................................
........................

30

No Signal

................................
................................
................................
................................
...............

30

Phone does not “power on”

................................
................................
................................
...................

30

LCD trouble

................................
................................
................................
................................
..........

30

Sound trouble

................................
................................
................................
................................
........

30

Ke
yboard malfunction

................................
................................
................................
...........................

30

Camera with flowery/blank screen

................................
................................
................................
........

30














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1. PAP3500Overview

1.1.

PAP3500Mobile Phone Brief Introduction

PAP3500

is
an
Android smart phone
,

whose

m
ain
board
is
develop
ed

and design
ed

based on Qualcomm
platform. The main board support
s dual card dual mode

WCDMA
,
GSM900/1800/1900 MHZ;

800MHz
CortexA5 processor
, the
phone
memory
is
256
MB ROM+
512
MB RAM; memory card
is
Micro

SD,
support
s

App2SD fu
nction; Expand capacity
is
32GB;
TFT/
LCM resolution

320
×
480

; multipoint

capacit
ive

touch

lens
;

supports
2

MP

camera

lens
; other functions include

USB2.0, BT, WIFI, GPS, 3D
accelerator,
proximity

sensor, magnetic sensor,
light

sensor, FM function and
B
lue
tooth call and
transmission
.


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1.2.

Main board Component

D
istribution
M
ap





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Name

Standard model

P
osition
code

Manufactu
rer

IC,MSM7227A
-
0,MOBILE STATION MODEM

MSM7227A
-
0
-
576NSP
-
AA

U702

QUALCOMM

IC,PM8029,Power Management

PM
-
8029
-
0
-
140WLNS
P
-
TR
-
02
-
0

U502

QU
ALCOMM

IC,RTR6285A(,Multimode RF
Transceiver

RTR6285A(
-
0
-
137CS
P
-
XX

U203

QUALCOMM

IC,AR6005,WIFI Single
Chip,802.11b/g/n

AR6005G
-
CF1B
-
R

U2901

ATHEROS

IC,WCN2243,FM&BT SOC

WCN2243

U2801

QUALCOMM

IC,SKY77542(,SPDT
SWITCH,0.1
-
6.0GHz

SKY77542(

U404

SKYWORK
S

IC,NAND+DDR
LPSDRAM,4Gb+2Gb,1.8V/1.8V,x16/x32,
45ns/400MHz/Large Page

H9DA4GH2GJAMCR
-
4E
M*

U601

Hynix

IC,KTD259,39V Step
-
Up LED Driver

KTD259EHD
-
TR

U910

KINETIC

Audio frequency
amplif
ier (3W

D
type)

AW8145CSR

U1102

AWINIC

Dual band launch module (900
/1800)

SKY77542
-
**

U405

SKYWORKS

Power amplify module(W2100)

ACPM
-
5201
-
LR1

U402

AVAGO

IC,SGM2019,LDO,3.3V,300mA

SGM2019
-
3.3YC5G/T
R

U110

SGMC

GPS
LNA(low noise amplifier)

MGA
-
24106
-
TR1G

U1303

AVAGO

Schottky diode

1PS79SB30,115

D901

NXP

Schottky diode

R
B520S
-
30

D801,D80
2

Jiangsu
Changdian

MOSFET(P channel)

WPM2341
-
3/TR

T501

WILL

IC,D6106,WIFI&BT FEM

D6106

U2902

EPCOS

32.768KHz crystal

Q13MC1461000100//
Q13MC1462000100

G501

EPSON

TCXO,19.2MHz,
±
1.5PPM,
-
30

/80

,10pf,3.2*2.5*1.0

TG
-
5021CE 19.2MHz

U505

EPSON

IC,BMA250,3
-
Axis Acceleration
Sensor,Digital

BMA250

U1101

BOSCH

SAW FILTER

(GSM)

SAFEA942MFL0F00R*
*

U206

MURATA

FILTER,SAW,DCS/PCS,50
Ω
/150
Ω
,BALANCED,1814

SF18
-
1842PASBA1

U207

K
YOCERA

SAW FILTER

(W
-
RX)

SAFEB2G14FB0F00R1
2

U204

MURATA

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SAW FILTER

(W
-
TX)

SAFEB1G95KA0F00R1
4

U205

MURATA

SAW FILTER

(GPS)

SAFEB1G57KE0F00R1
4

U1301,U1
302

MURATA

A
ntenna diplexer

(WCDMA2100)

SAYFP1G95AAOBOO**
*

U403

MURATA

0603

Chip Bead

BLM18PG181SN1D

B
L701,BL
1101

MURATA

0402

piezoresistor

(low
capacitance
)

SFI0402
-
050E33ONP
-
LF

RV1013

SFI



2. R
adio
F
requency

Part

2.1. Launch Part Brief Introduction

Launch
department ha
s MSM
7225A(CPU)+RTR6285A(TRANSCEIVER

+SKY13374


SPDT Switch

+

SKY77542 (RFPA)
.

RTR6285A:

RTR6285

RF’
s

(radio frequency) UMTS / EGPRS network transceiver

have incomparable

level of
integration

in the industry and
multi
band function provides

global roaming functi
on.
The
diversity
of
i
ntegrat
ion

receiv
ing
significantly
reduce
equipment manufacturer’s cost and time, the network of mobile
phone function and the technology of enhance performance, and integrate GPS function support, and
provide a cost
-
benefit

way to me
et the needs of the global wireless and emergency services.
The
diversity
of
receiving
from

such a way that RF signal technology of multiple antenna
s
combin
ed,
the actual strength
is
improved, and thus the network capacity
of

operators

is
increase
d

signifi
cantly. Mobile equipment will
experience higher data throughput

in addition to
the
diversity
of
receiv
ing
.

The

reduc
ing of t
he diversity of
receiving

that
RTR6285 transceiver integrat
ed
eliminated many extra components
that need

bill
material,
the cost of
the equipment manufacturer.

SKY77542


Spreadtrum communications SKY77542 is a highly integrated single chip radio transceiver chip, the chip
support 3G TD
-
SCDMA HSUPA, HSDPA and GSM/EDGE (hedge 2.5G) operation, without external
launch SAW filters, barron or low noise amplifier (LNA).

High performance cellular handsets. The
SKY77542 low cost batch CMOS implementation, optimization, to meet today's small size, low power
consumption challenge, has five total transmission port and six receiving port
.
. SKY77542 provide
s

the
operation of co
nnecting

multiple frequency band. SKY77542 provides a multimode, multiple frequency
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band

applications with cost competitiveness
which is
minimum power consumption
and
maximum
performance

and small size wireless solutions.

2.5G

and
3G

3

lines b
us
a
rchitectu
re

programme’
s wireless
transceiver

support analog
I / Q

interface







2.2. Launch Maintain B
lock
D
iagram







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2.3. Receive Part Brief Introduction

Receiving department has

MSM7225A(

CPU)+RTR6285A(TRANSCEIVER

+SKY
77542(RFPA)
.




Check
whether
Transceiver IQ signal
input feet have IQ
signal

?

Check PA

s RF

signal

output pin
,
whether
there is any RF sig
nal
?

Y

C
heck CPU

N

Y


Y

Check Transceiver,

whether there is any
RF

output
signal
?

N

VBAT,PA_EN,BA
NDSW_DCS,VAP
C, are they OK?

Replace PA

Y

Check CPU

N

Replace
Transceiver

N

Check
Transceiver

External
RC

Y

Check antenna switch
or matching network

(No transmit) Connect PC and cell
phone with maint
enance of line,
use the Repair software making
mobile phone access to transmit
state.

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2.4. Receive Maintain Block Diagram


No receive

Open Repair
Tool
Software

to connect PC with
mobile phone
,

make
the phone access to
receiving state
,
adjust

s
ignal generator

to
correspond
ing
CH
, and
connect

the
signal

line to phone

s
RX_SW
.

Check
the receive

signal
in
put pin of Transceiver,
whether there is signal?

R
eplace 6253


C
heck RX
-
filter

Check e
xternal RC

components

of
T
ransceiver

Check or
replace the
antenna swit
ch and
matching circuits

Whether

PA signal
input pin

has
receive
d
any signal
?

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2.5. Common
radio
-
frequency signal

oscillogram

radio
-
frequency

port
frequency spectrograph

as follow



GSM launch signal


DCS launch signal

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Launch state PA PA
-
EN
wave form


PA
-
EN

PA. BAND
-
SW

wave form


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PA.BAND
-
SW

GSM



PA.BAND
-
SW

DCS



PA Vramp
wave form


Vramp(pcl5)

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Vramp(pcl 19)

Signal
generator

outputting signal

input end




GSM CH62
Channel

receiving signal

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DCS CH 698

Channel

receiving signal


TCXO output

26MHZ



3.
Baseba
nd part

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3.1.
Baseband overview

MSM7225A:

Adreno 200 adopt 65nm processing

with u
nified Shader architecture
. Under OpenGL
-
Es 1.x
standard, the quality of images has promoted
observably
. The developer can be able to use its
graphics
capability

up to the hilt
, which is impossibile ago
.


·

The first
graph manipulation

product which supports OpenGL ES 2.0.


·

Support CPU

DSP

graphics and MDP
collateral execution
.


·

Support video,
photograph

device 3D
graph

information real
-
time processing.

·

Support graph st
andard

API

: OpenGL ES 2.0, OpenGL ES 1.1, OpenVG 1.1, EGL 1.3, Direct3D
Mobile, SVGT 1.2. DirectDraw

Architecture

Cortex A5

I
nstruction set
: ARMv7[1]

C
raftsmanship

45nm

Frequency 800MHz

GPU Adreno 200

Network mode GSM WCDMA

L2 cache 256KB

WiFi 802.11b/g/n

Bluetooth BT4.0


HVGA display support



VGA video decode



5 million pixels camera lens support


Integrated GPS location services



3.2. M
inimum

system


MSM7225A
chip camera
lens
module, each

pin

is
software configurable GPIO,
when
the default state,
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every pin

name indicates



MSM7225A
chip
,
RF part of the interface. In
RTR6285A
. Part of the
pin

is

GPIO (multi
-
function), all
pin
function
s

look pin
definition.



MSM7225A

MEMORY/NAND port

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MSM7225A,LCM port


MT6575

main part

the details as follow



MSM7225A JTAG port



MSM7225A chip SD card port

SPI port


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MSM7225A chip

interrupt

port

PWM port

I2C port,
serial interface
,
debugging

serial interface
,
keyboard
scan

interface



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MSM7225A

power management part


3.3.
voice frequency decode


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MSM722
5A

voice frequency decode module

3.4.SPK+

voice frequency power amplifier


voice frequency

PA

module

AUXSPP/AUXSPN

voice frequency

input

+
),
AUDPA_EN

voice frequency

enable control

RSPK+/RSPK

3.5.MIC+earphone


V_MIC signal is MIC
bias current

MICP0

MICN0
MIC
input

end

MIC+/MIC
-
connect MIC.

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earphone MIC circuit

same as MIC


earphone

SPK circuit

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3.6.BT/FM circuit

BT

WIFI

GPS




3.7.WIFI circuit


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BT/WIFI

antenna


Power, clock, FM port


D
ata interface



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WIFI, BT all kinds of interfaces




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3.9.GPS ci
rcuit



GPS_RF Part


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4.0. Light and distance sensor



4.3.3D

acceleration transducer


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4.4. LCM circuit


4.5. Common B
aseband

maintain case

3.7.1NAND FLASH

programming does not download

D
ata line
s used for downloading software:
VCHG DM DP GND
. It is

mostly due to the false
solder and
wire bonding
. First check whether the
serial port

of
PC and cell phone

is
unrestricted
, if
not, it is caused by being lack of devices or empty solder of
power manage
r,
USB
-
con

and
p
eripheral resistance
. Measure the
TX, R
X signals

by using
AC
-
coupled oscilloscope

to
track the
signal flow
, i
f a certain period circuit of no signal
it
may be
AC

short circuit to ground, or is caused
by a short circuit and open circuit
. On checking the malfunctions, first should
carefully obser
ved

the welding of these devices

with a magnifying glass
,
then plug in the
download

line to

o
bserve
whether

the current is normal, there is
short
-
circuit

to ground of

VCHG or VBAT

if the current is
large, at this time
cut off po
wer supply as soon as possible, and then find
the

short
-
circuit point;

It
may the
abnormal

output power supply

of a certain circuit that
the current is greater than normal
(about 30 mA) but not particularly large
, at this time
should check
whethe the valg
ate of
VCORE
(1.8V), VDD (2.8V), VADD (2.8 V), VTCXO (2.8V), VRTC (1.5V), VMEM (2.8V)

is noamal, if not,
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bad

welding

can be
detected
. Focus on checking the welding of PUM and USB
-
CON if there is
l
ittle or no current
.
Unplug
and
re
-
plug

the
download line to

see
if it caused by poor contact;

It can
be test that whether the
output to the CPU

of
26MHz
clock
signal
is

normal
by using
oscilloscope
.


3.7.2

Detection

and
Maintenance Flow Chart

of No download malfunction


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About the
s
creen
, first find the problem
whether

is from mainboard or screen by adopting replacement
Not download

Check whether it is the problems
of procedure allocation,
download cable, power supply,
software

and

PC.

E
liminate

any
reasons for not
download
except the cell
phone.

Y
es

Check whether
the
serial port

of
PC and cell phone

is
unrestricted
.

Check whether the
5pin connector
USB
-
CON

is false
soldered or
damaged.

NO

NO

Check USB
-
con

p
eripheral
resistance

NO

Connected to the download line

and
observe

the
ammeter

whether it is
high
-
curren
t

(
normal current

is
generally
about 30mA).

Y
es

Quickly disconnect the
connection,

and touch
the chip
gently

to see
if it is hot, if no focus
on measuring the
short
-
circuit point

by
using
multimeter
.

Y
es


Little or no current

Check VCORE

VDD

VADD

VTCXO

VRTC

VM䕍

m敡e畲e
t桥⁣×潣欠oi杮慬猠潦′㙍HZ

㌲3HZ

Normal

c
urrent

but no download

Check whether the CUP and
NORFLASH is OK


LDO i猠
湯nm慬?

C桥捫 w桥×桥× t×攠
v潬t慧攠 獵灰sy

潦 C偕
灯p敲 m慮慧a
rⰠ
PMU

a湤
LDO

i猠 湯n
m慬,
w桥×桥×⁴桥×攠e猠s湹⁰潷敲⁳異灬y灥渠捩r捵ct.

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method, then focus on checking the
LCM
-
CON welding
.


5.
Reference
f
o
r

maintenance

No Signal

The c
ommon processor
s: Transceiver, PA.


Phone does not “power on”

The ph
one can not power on is usually caused by false welding. First need to check the
signal

i
ntegrity

of
26MHZz, 32.768KHz

as well as the

c
ontinuity

of s
ignal path
.
Then
check

the
i
ntegrity
of
core voltage

and
path
. G
enerally, CPU will less be damaged, and it
is due to

s
maller current

but
normal
voltage
, at this time
Replacement method

should be adopted, and try to
add more welding,
re
-
welding
.


LCD trouble

Re
-
welding

display

interface

and nearby r
esistance

row, as if it is still ab
normal
, check the pad
whether

it is of
short circuit.


Sound trouble

A
udio processes in internal CPU, focus on checking the Audio
-
PA on the issue of free or
miscellaneous ring tones. Low ring for checking its solder joints

(very small, and easy to cause
problems)
.

Try more times for r
e
-
welding and replacement.


Key
board
malfunction

In most cases

there is something wrong with the linking of
single button

with
circuitry

if only this
button does not work. F
ocus on

checking the
resistance

row

near the display or whether
CPU

is
short circui
t

if
group

buttons do not work.


Camera
with

flowery/
blank screen

First check the
Interface

whether there is any

false solder, and check
peripheral devices
whether
lack of

devices
.



Note:
The waveforms may be different according to the settings and
differ
ent devices

in
maintaining.