A1K Service Manual -V1

Content

1.Guidance
2.General Repair Information    
3. Phone Structure Diagram    
4. Disassembly Steps
5. Assembly Steps    
6. Calibration
7.  Function Test    
8. General Cautions

1. Guidance
The purpose of this document is only to guide OPPO technicians to carry out maintenance service to OPPO products. The content shall be keep in confidential, only avail be able to OPPO authorized service centers, and cannot be provided to third parties without authorization. Please follow the regulations and the guidance for maintenance service. For any problems, please contact China HQ in time.
1.1 Warnings and Cautions
1.1.1 Warnings
1. Care must be taken on installation in vehicles fitted with electronic engine management systems and ABS (Anti–skid Braking Systems). Under certain fault conditions, emitted RF energy can affect their operation. If necessary, consult the vehicle dealer/manufacturer to determine the immunity of vehicle electronic systems to RF energy.
2. Phones must not be operated in areas likely to contain potentially explosive atmospheres, e.g. petrol stations (service stations), blasting areas etc.
3. Operation of any radio transmitting equipment, including cellular telephones, may interfere with the functionality of inadequately protected medical devices. Consult a physician or the manufacturer of the medical device if you have any questions. Other electronic equipment may also be subject to interference
1.1.2 Cautions
1. Repair services and calibrations must be undertaken by qualified personnel only.
2. Use only approved components as specified in the parts list.
3. Ensure all components, modules screws and insulators are correctly re-fitted after servicing and alignment.
4. Electrostatic discharge is the main cause of damage to sensitive components of electronic products. Service centers must operate in accordance with OPPO's requirements for ESD protection. Ensure all work is carried out at an ESD workstation and that an ESD wristband is worn.

2.General Repair Information
1.Ensure all work is carried out at an ESD workstation and that an ESD wristband is worn before starting maintenance.
2.Wear ESD gloves to avoid oil stains and fingerprints.
3.Use protective films to protect the display, camera, camera lens to prevent dust and scratches. 
4.Use a clean cloth, ESD brush and alcohol (Concentration above 95%) for appearance cleaning. Do not use other items (such as an eraser) for cleaning to prevent the protective layer from being scratched, which may lead to oxidation and corrosion.
5.Faulty welded mechanical parts (except shield cover and shield frame parts) can only be replaced and not repairable.
6.Use accessories provided by OPPO.
7.Check the contacts or solder joints of devices that may cause simple faults (e.g. soldered interfaces or switches). Re-weld if necessary (only for service centers where lead-free soldering is available) and clean the flux remaining after soldering.
8.Use the equipment provided by OPPO to test the phone (e.g. When the charging function of the device is abnormal, do use the original OPPO adapter to test to ensure the accuracy of the test results).
9.Fill in the fault phenomenon code and fault reason code according to the actual situation, and accurately enter the replacement material code in the CRM system (Refer to the Smart Phone Fault Reason Matching Code List if necessary).
10.For more information about products, please visit the company FTP server: ftp://ftpex.oppo.com:919/

3. Phone Structure Diagram
3.1 Product Appearance
 As shown in Figure 3-1-1

3.2 Phone Structure Explosive View
As shown in Figure 3-2-1

                                                             Figure 3-2-1
3.3 Corresponding Material Table:
 

SN	Material	SPEC.	Unit	QTY
1	Semi-finished FPC	18540-MAIN FPC-patch_HQ-A1 WINTER HQ	PCS	1
2	Non-self-tapping screw	M1.4×3.5mm Nylok silver HQ	PCS	20
3	Sealed silicone case for Headphone seat	18540 Black HQ	PCS	1
4	Front Camera	Samsung 3264*2448 8.5*8.5*5.2 5P BTB TA8S1EB HQ	PCS	1
5	Receiver	50mW 28Ω 0908*2.05 HQ	PCS	1
6	Sealed silicone case USB seat	18540 Black HQ	PCS	1
7	Rear Camera	Samsung 3264*2448 8.5*8.5*5.2 5P BTB TA8S1EB HQ	PCS	1
8	Vibration motor	14.82*8*3.2 3V 30Ω±15% 10.82mm HQ	PCS	1
9	RF Connection cable	0.3Ω 171.04mm 818014303 HQ	PCS	1
10	Display assembly	CPH1923 black/red (for after-sales)	PCS	1
11	Battery	@ 3890mAh 3.85V 0.7C BLP711 416286 NA I927	PCS	1
12	Battery cover assembly	CPH1923 red (for after-sales)	SET	1
13	SIM card holder	18540 Black HQ	PCS	1
14	Speaker	1W 8Ω 17*10.85*2.15 HQ	PCS	1
15	Conductive copper foil for the front camera	18540 Single-sided adhesive HQ	PCS	1
16	Semi-finished FPC	18540-V-patch_HQ-A1 WINTER HQ	PCS	1
17	Mainboard bracket	18540 Black with cushion HQ	PCS	1
18	Upper cover BOTTOM surface waterproof PET film	18540 Single-sided adhesive HQ	PCS	1
19	Power key PET film	18540 Single-sided adhesive HQ	PCS	1
20	Semi-finished FPC	18540-P -patch_HQ-A1 WINTER HQ	PCS	1
21	Volume key PET film	18540 Single-sided adhesive HQ	PCS	1
22	Battery bottom cushion	18540 Single-sided adhesive HQ	PCS	1
23	Semi-finished PBC	Semi-finished PBC	PCS	1
24	Semi-finished PBC	18540_AL1891C(A)-V0.4 WINTER HQ	PCS	1

Note:This table is used only for the name of the annotation. It is not suitable for the preparation of materials. Please refer to the “Price list of Commonly-used Materials and Accessories 20190412” for the preparation. 

4. Disassembly Steps
4.1 Disassembly Tools

4.2 Preparation
1. The phone must be powered off before disassembly.
2. Way to Power Off: 
System Power Off: Press the power key then slide to power off.
Forced Power Off: Long press the volume “+” key and power key for about 8 seconds until the display is off.
4.3 Disassembly Steps

Step	Content	Figure	Cautions
1	Disassemble the battery cover		Avoid scratching the battery cover with the ejection pin when removing the SIM holder ; Avoid scratching the battery cover with the disassembly rod when removing the battery cover ; Use the protective film to protect camera lens ; Check the appearance of the battery cover, making sure there is no paint off, color variation, bubbles, scratches and cracks;
2	Disassemble the mainboard bracket		Remove the mainboard bracket from the lower right corner.
3	Disassemble the battery		Check the appearance of the battery, making sure there is no puncture, indentation and leakage before putting it into the battery tray according to the status; The disassembled can be used only when it has been pasted with the new easy-tore paper;
4	Disassemble the front camera and rear cameras		Do not touch camera lens during disassembly;
5	Disassemble Display FPC, RF Connection Cable , and Mainboard		Use the textured/release paper to protect the front camera hole.
6	Disassemble the speaker box and the Antenna board
7	Disassemble the Receiver ,Power key FPC ,and volume key FPC		Avoid breaking the FPC
8	Disassemble the battery bottom cushion, main FPC，and the motor

5. Assembly Steps    
5.1 Bill of Must-Be-Replaced Materials

No.	Material	Code	PCS
1	Non-self-tapping screw	4210672	PCS
2	Battery Easy-tore Paper	4876448	PCS
3	Battery extracting sticker	5181711	PCS
4	Decorative Piece Tape for Rear Camera	4876862	PCS

5.2 Assembly Steps

Step	Content	Figure	Cautions
1	Assemble the receiver ,motor ,power key FPC, and volume key FPC		Pay attention to the direction of the receiver
2	Assemble mainboard ,front camera and rear camera lens		Align the front edge of the mainboard when pasting the copper foil
3	Assemble USB seat,  sealed silicone case , Headphone seat sealed silicone case, antenna board , and main FPC		Insert the antenna board from the lower left corner first to install it;
4	Assembly speaker , Battery bottom cushion, Non-self-tapping screws, and the battery
5	Assemble Mainboard bracket, screws , PET sheet for side keys , PET sheet for the mainboard assembly		Assemble the mainboard bracket from the left side;
6	Assemble the battery cover

6. Calibration
NA

7.  Function Test
7.1 Test Path
Dialing Interface>Enter*#899#>Enter automatic test； The "Confirm" dialog box will pop up after the test complete, if there is no problem choose “Pass”, otherwise choose “Fail”.
7.2 Test Requirements

No.	Test Items	Test Requirements
1	LCD Test	Observe the red, green, blue, white, black, gray, grayscale and color interface successively; If there are black spots, bright spots and other anomalies, the function is sound;
2	Vibration Test	Get ear close to check the vibration from the motor for 3 seconds. If the motor vibrates normally(No noises or weak vibration), the function is sound;
3	Touch Screen Auto Test	If the interface shows “PASS” and jumps to the next test, the function is sound;
4	Front Camera Preview	Align the front camera with a white surface and a black surface. If there is no black dot, black line or blurred screen on the screen after aligning the white surface, and there is no bright spot on the screen after aligning the black surface, the camera is sound;
5	Rear camera preview	Align the rear camera with a white surface, a black surface, and a surface with text. If there is no black dot, black line or blurred screen on the screen after aligning the white surface, there is no bright spot on the screen after aligning the black surface, white point or blurred screen, the camera is sound;
6	Echo test	Testing Main MIC: Blow the air to the MIC hole on the bottom of the phone. If the receiver (earphone) sounds, the function of Main MIC is sound; Testing Sub MIC: Blow the air to the sub MIC hole on the top of the phone. If the speaker sounds, the function of Main MIC is sound;
7	Flashlight Test	Open the flashlight. If it can be opened normally with color deviations, the function is sound;
8	Charging Test	Use the original OPPO adapter and USB cable to charge. If the interface shows “PASS” and jumps to the next test, the function is sound;
9	Headset in-out Plug test	Plug in and out the earphone with the OPPO earphone. If the interface shows “PASS” and jumps to the next test, the function is sound;
10	Sensor Self-test and Calibration	When the phone enters into the Sensor self-calibration interface, the phone must be placed on the desk flatly. Then click the first calibration item. After the test is passed, it will automatically jump to the next test item
11	M-Sensor Test	Shake the phone from the left to the right side. If the interface shows “PASS” and jumps to the next test, the function is sound;
12	Proximity-sensor Test	Use the palm to cover the light sensor hole, and the screen will turn green from black. If the interface shows “PASS” and jumps to the next test, the function is sound;
13	Keypad Test	Press the power key and volume key one by one. If keys can be pressed normally and the interface jumps to the next test, the function is sound;
14	Media test	Click the “20-4K（-3db）signal” to test the sound of the media function for 5s. If there is no silence, weak sound, noises, and breaking sound, the interface shows “PASS” and jumps to the next test, the function is sound;
15	Call test	If the phone has been installed with the operator's SIM card, dial the corresponding operator's phone number. If no card is installed, call the 112 to test (Calling the Operator is recommended). If the call can be performed normally and the receiver is without noises or weak sounds, the function is sound;

After the above 15 items are tested, they will prompt to the test result interface. If the test PASS, project will show “√”; If the test FAIL, project will show “×” as shown below.

           Figure 7-1                             Figure 7-2

8. General Cautions
NA
----Technical Support Team of OPPO Service Dept.