FLY DS150 Service Manual
DS150 Service Manual by Fly
DS150 Service Manual
1－31
DS150 Service Manual by Fly
Content
1 INTRODUCTION TO BLOCK DIAGRAM................................................................................................3
2 ENGINEERING MODEL........................................................................................................................... 3
3 BLOCK DIAGRAM................................................................................................................................... 4
4 TECHNIQUE PARAMETER..................................................................................................................... 6
5 BASEBAND TROUBLE...........................................................................................................................9
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
5.14
5.15
5.16
5.17 TF card trouble ........................................................................................................................ 26
Preparatory work for repair........................................................................................................ 9
Flash programming does not download
Phone does not “power on”
Sound trouble
Can not charge up
LCD trouble
Keyboard not function
Microphone trouble
Earphone part trouble
USB transmit trouble
Vibrator trouble
Receiver does not work
Camera trouble
FM circuit trouble
Bluetooth has not function
Phone can not access SIM card
................................................................... 11
............................................................... 13
.................................................................... 14
............................................................ 15
.............................................................. 16
............................................................ 17
............................................................. 18
................................................................. 18
................................................................. 20
................................................................22
....................................................... 10
.......................................................... 19
........................................................ 23
................................................... 24
.............................................. 9
6 RF TROUBLE.........................................................................................................................................26
6.1
6.2
6.3
6.4
7 MAINTENANCE TOOLS........................................................................................................................ 31
Principle of operation
AGC failure
AFC failure
APC Failure
............................................................ 26
..................................................................... 28
..................................................................... 28
.................................................................... 29
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DS150 Service Manual by Fly
1 Introduction to block diagram
■ Logic Part
D200 [CPU,MT6223C]
MT6223 is an entry level chipset solution with class 12 GPRS/GSM modem. It integrates only analog
baseband but also power management blocks into one chip and can greatly reduce the component
count and make smaller PCB size. Besides, MT6223 is capable of SAIC (Single Antenna Interference
Cancellation) and AMR speech. Based on 32 bit ARM7EJ-STM RISC processor, MT6223 provides an
unprecedented platform for high quality modem performance
MT6223 runs the ARM7EJ-STM RISC processor at up to 52Mhz, thus providing best trade-off
between system performance and power consumption.
G101 [VC-TCXO 26MHz]
Main Clock for Control Processor and RF Block, Subsystem
G201 [32.768 KHz Sleep Crystal]
32.768 KHz Clock for Sleep Mode Operation and RTC block.
■ RF Part
D102 [RF Transceiver MT6139BN]
MT6139 is a highly-integrated RF transceiver IC for the Global Systems for Mobile Communication
(GSM850/GSM900), Digital Cellular Communication Systems (DCS1800), and Personal
Communication Services (PCS1900) cellular systems. It includes four LNAs, two RF quadrature mixers,
a channel filter, a programmable-gain amplifier for the receiver, a high-precision I/Q modulator for the
transmitter, a 26 MHz VCXO reference, a fractional-N frequency
synthesizer with a fully-integrated LC-tank VCO and three built-in LDO regulators for VCO, VCXO and
SDM. It is housed in a 40-pin QFN package with a downset paddle for additional grounding.
U102 [PA RPF88130B]
• Small package : 5.5 × 5.5mm(typ) 1.2mm t max.
• Built-in closed loop APC circuit with power detector performs stable
TRP(Total Radiated Power) under load mismatch conditions.
• Built-in Antenna Switch
• High gain 3stage amplifier: +3dBm input typ.
• Built-in ESD protection: outstanding 8KV ESD at Antenna.
• Lead free soldering process available
• GPRS Class 12 compatible
• High efficiency:
41% Typ. for GSM900
35% Typ. for DCS1800
.
2 Engineering model
Automatic test mode command
■
Test list as follows:
: *#88#
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DS150 Service Manual by Fly
Test Station Flag Ver s ion LCM/Keypad LCD Receiver/MI C
FM Speaker
All test done
■
Separate test command
Ver s ion Resource BIN Echo loop Vib ra to r
LED Hea ds e t RTC
MTBF UART Mermory card Nand Flash FM Radio Camer a Bluetooth
Report
: *#32*#
LCD Charger
Key pa d
ADCLCD c ontr as t
Key pa d
Speaker/Vibrator/T-flashHea ds etCamera Battery FM Headset
Loud spk Ringtone
3 Block Diagram
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DS150 Service Manual by Fly
5－31
4 Technique Parameter
Item Description Character
1 Frequency GSM
TX：880~915Mhz
RX: 925~960Mhz
DCS
TX：1710~1785Mhz
RX：1805~1880Mhz
2 Phase Error RMS<5° Peak<20°
3 RX sensitive EGSM/DCS1800 -104dB
4 TX POWER GSM 2W(33dBm) /DCS 1W(30dBm)
5 Frequency Error <0.1ppm
6 POWER LEVEL
7 Spectrum due to
Modulation
EGSM DCS
Level Power Range Level Power Range
5 33dBm ±2dBm 0 30dBm ±2dBm
6 31dBm ±3dBm 1 28dBm ±2dBm
7 29dBm ±2dBm 2 26dBm ±2dBm
8 27dBm ±2dBm 3 24dBm ±2dBm
9 25dBm ±2dBm 4 22dBm ±2dBm
10 23dBm ±2dBm 5 20dBm ±2dBm
11 21dBm ±2dBm 6 18dBm ±2dBm
12 19dBm ±2dBm 7 16dBm ±2dBm
13 17dBm ±2dBm 8 14dBm ±2dBm
14 15dBm ±3dBm 9 12dBm ±3dBm
15 13dBm ±3dBm 10 10dBm ±3dBm
16 11dBm ±5dBm 11 8dBm ±5dBm
17 9dBm ±5dBm 12 6dBm ±5dBm
18 7dBm ±5dBm 13 4dBm ±5dBm
19 5dBm ±5dBm 14 2dBm ±5dBm
Carrier Wave offset(kHz) GSM (dBc) DCS (dBc)
100 ＋0.5 ＋0.5
200 －30 －30
300 －33 －33
400 －60 －60
600～1200 －60 －60
1200～1800 －60 －60
1800～3000 －63 －63
3000～6000 －65 －65
6000 －71 －73
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DS150 Service Manual by Fly
8 Spectrum due to
Switch
Carrier Wave offset（kHz）
400
600
1200
1800
GSM (dBm) DCS/PCS
(dBm)
－19
－21
－21
－24
-22
-24
-24
-27
9 BER EGSM/DCS1800
BER（II）<2%@－102dBm
11 RX Level Precision ±3dB
12 SLR 8±3dB
13 TX Response
Fre.(Hz)
100
MAX（dB）
－12
MIN (dB)
/
200 0 /
300 0
1000 0
2000 4
3000 4
3400 4
－12
－6
－6
－6
－9
4000 0 /
14 RLR 2±3dB
15 RX Response
Fre.(Hz)
100
MAX（dB）
－12
MIN(dB)
/
200 0 /
300 2
1000 *
2000 0
3000 2
3400 2
－7
－5
－5
－5
－10
4000 2
16 STMR 13±5dB
17 Distortion
TO ARL （dB） Grading ratio（dB）
－35
－30
－20
－10
17.5
22.5
30.7
33.3
0 33.7
7 31.7
10 25.5
18 Side tone
3 rank distortion<10％
distortion
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DS150 Service Manual by Fly
19 Ring Volume At least 85dB in the following.
Incoming tel. alert and message alert are rings
When testing distance is 10cm.
20 Charge Current <700mA
21 Antenna display
22 Battery status
23 Alarm Voltage 3.6±0.03V
24 Auto turn off
voltage
25 Battery type Li.Battery
26 Charger AC mode charger
Bar Number Power
5
4
3
2
1
0
Bar Voltage
0 3.62V
1
2
3
4
3.5±0.03V
Standard Voltage＝3.7V
The top voltage＝4.2V
Capacity：1000mAh
Import：100～240V，50Hz
Output：5V，600mA
－85dBm～－50dBm
－89dBm～－82dBm
－93dBm～－86dBm
－97dBm～－90dBm
－101dBm～－94dBm
－110dBm～－98dBm
3.73V～3.62V
3.8V～3.73V
3.91V～3.8V
3.91V～4.2V
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DS150 Service Manual by Fly
5 Baseband Trouble
5.1 Preparatory work for repair
5.2 Flash programming does not download
Analysis Process：
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DS150 Service Manual by Fly
Not Dow nload
Current>300mA
VCHG
or VBAT
whether
short circuit
and GND
Slightly larger than normal
VCO RE（1.8V
AVDD（ 2.8V
VDD（ 2.8V
VT CXO（2.8V
VRT C（1.5V
）、
）、
）、
）、
）、
VMEM( 2. 8V)
Check voltage
whetheris normal,
reverse Resistance
whether is normal
，
whether there is short
circuit
Check
current
YES
Check test point
voltage (UTX,URX
is 2. 8V)
YES
Che ck 26M Hz
Not wave output
YES
Dow nlo ad is mainly c ommun ic ations
betw een the CPU and FLASH
，
including the line of control, address lines
and data lines
。
If chec k external circuit
no problem，CP U ad n F LASH w elding
no problem,the final issue may itself
access to the PCB,there are problems removed the CPU and FLASH, Trace of
the on-off
Little or no current
NO
Chec k the
corresponding
signals in the
circuit-off
example:TP201
2,TP2013
（
For
）
First check
U111whether
there is VCCRF
output;secondly,
check welding of
the D102
Ch ec k VBAT
，
VCHG
voltage
whether is
normal，If
there is no
voltage,
c h ec k w elding
of the system
I/O
5.3 Phone does not “power on”
Power on principle of phone: When the power supply is connected with the phone, through internal
switching circuit in the boot it will form a trigger High-level, when press boot button long enough, the
boot high-level change to low-level because of connecting with GND, and the signal reaches PMU block,
PMU will activate the internal voltage regulator and output stable voltage, as a logical part of the core
CPU will gain power supply.
We know phone boot in three necessary conditions: Power Supply, clock and reset. Now power
supply has been provided, then Crystal will produce 26 MHz clock signal, on the one hand it will be
taken as a RF reference clock, on the other hand, it will be sent to logic to the clock signal. After the
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