DS160 Service Manual_1116

7/28/2019 DS160 Service Manual_1116

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DS160 Mobile Phone Maintenance Manual V 0.1

Revision record

Date Revision

Version

Revision

ReasonRevisionChapter

Revision Description Author

2009-11-13 V 1.0 First draft complete Yali Liu

Shanghai Huaqin Telecom Technology Co.Ltd (OPEN DOC) Page 2 of 29


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Table of Contents

1. Technical Specifications.............................................................................................................................5

2. Disassemble Procedures.............................................................................................................................7

3 Functional Module....................................................................................................................................13

4. Troubleshooting .......................................................................................................................................154.1 Unable to power on the phone ...........................................................................................................15

4.2 Ringtone Fault....................................................................................................................................16

4.3 LCD display fault...............................................................................................................................17

4.4 Failure to Charge................................................................................................................................18

4.5 Camera fault.................................................................................................................................... 19

4.6 Failure to identify SIM card...............................................................................................................20

4.7 Main Microphone fault ................................................................................................................... 21

4.8 Receiver fault ............................................................................................................................... 224.9 Keypad fault.................................................................................................................................... 23

4.10 FM fault ........................................................................................................................................24

4.11 Bluetooth fault............................................................................................................................... 254.12 No RF Signal................................................................................................................................. 26

4.13 Failure to read T-flash card ..............................................................................................................274.14 Earphone Fault ................................................................................................................................. 28

4.15 Electric torch Fault...........................................................................................................................29

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ZL99A is a GSM (GPRS) phone independently developed by

Shanghai Huaqin Telecom Technology Co., Ltd. The Maintenance

arrangement in this article includes three levels:

1. The first level is able to locate the trouble at local by

empirical without any special tools. Hot air gun is usually

not used, and mobile phoneswith IC fault are generally

not repaired unless approved by the company when

necessary.

2. The second level can make use of some special tools to

solve the trouble. And its difficult to think out problems

only by empirical as the first level. Special tools such as

hot air gun, electric iron, oscilloscope and test set need to

be used when necessary. Any component can be used so

as to help to solve the problem.

3. The third level maintenance mainly solves problems that

can not be solved at the second level, and is handled by

the Sevice and Repair center.



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1. Technical Specifications

Table 1: Conductive Radio Frequency

Radio Frequency (900MHz)

Frequency range Transmission: 880-915MHz; Receiving:925-960MHz

Bandwidth per channel 200 kHzTotal number of channels 174 channels x 8 (TDMA)Carrier modulation GMSK (Guassian Minimum Shift Keying)

Duplex bandwidth 45 MHzFrequency stability 0.1 ppmOutput power 332dBm - 55dBmReceiving sensitivity -106 dBm

Radio Frequency (1800MHz)

Frequency rangeTransmission: 1710-1785 MHz;Receiving: 1805-1880 MHz

Bandwidth per channel 200 kHzTotal number of channels 374 channelsx 8 (TDMA)

Carrier modulation GMSK (Guassian Minimum ShiftKeying5)

Duplex bandwidth 95 MHz

Frequency stability 0.1 ppmOutput power 302 dBm 05 dBm

Receiving sensitivity -105 dBm

Operating temperature range -10 to +55

GPRS functionality GPRS CLASS 10

Table 2: Work ing Voltage

Working VoltageLi-ion battery DC 3.5-4.2 V

Table 3: Power Consumption

Power Consumption

Average working current < 250 mAstandby current < 4 mA



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Talk time* Around 90~160min (1200 mAh lithiumbattery)

Standby time* 300~400h (1200 mAh lithium battery)

* Depend on network conditions.



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2. Disassemble and assemble Procedures

2.1 Disassemble procedure(1) Remove the screw-hole-plugs of the screw, battery cover

You can pull out the screw with pins or other forceps .Be careful of the shell please. Push the back cover

according to the direction by the arrowhead. Pull the touch pen, please do it along the parallel .

(2) Remove the screws

Remove another 2 screws with the screwdriver

(3) Remove the A coverRecur to the hard plastic card , tear open the A cover, such as below



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(4) Remove the main board and the B cover

a. Be careful of the side key

b.Please take out the SIM card before you want to remove the main board

(5) Remove the receiver and the main keysa. Prize the receiver with the forceps softly

b. Push the face of the main key . Please keep our eyes open the six red points ,keep there right

position



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(6) Remove the LCD

Turn on the LCD as the arrowhead showed and remove it with the iron .

LCD PAD

(7) Remove MICAfter LCD removed, please dismantle the MIC with the iron.



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(8) Remove the RF bracket

Remove the screw firstly .Then take down the bracket

RF screw

(9) Remove the FM bracket, SPK and DC J ack

First remove the FM FPC PAD and the SPK pad with the iron. Then loose the Camera and take

down the FM bracket. Last take out the DC J ack and the SPK.

SPK

DC JackSPK PADFM FPC PAD



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(10) Remove the Camera

Remove the camera FPC with the iron as below.

Camera Pad

(11)Remove the electric torch LED

Remove the electric torch LED with the iron.

Electric

torch Pad



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(12) Remove the Dome

Remove the Dome as below,

2.2 Assemble procedureThe assemble procedure is in opposition to the disassembling



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DS160 Mobile Phone Maintenance Manual V 0.13 Functional Module

This partdemonstrates the main functional module of ZL99A phone.

MainBoard

Figure 3-1 Mainboard topside

Description:

LCM key LED key PAD receiver MIC solder

Figure 3-2 Mainboard bottom side

Description:



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speaker and speaker components camera and camera LDO T-flash

connector SIM card connector RF components and RF connector BT

components FM radio IC (RDA5802E) I/O connector and battery connector charge PMOS IC


DS160 Service Manual_1116

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