iPhone 4 CDMAecx.images-amazon.com/images/I/B10WLQ3bPPS.pdf · iPhone 4 CDMA iCracked likes to stay on the safe side of repairs, and by using ESD (Electrostatic Discharge) safe tools

Display Replacement GuideiPhone 4 CDMA

iTech Training Courses

iPhone 4 CDMA

©2014 iCracked, Inc. All rights reserved. iOS, all Apple product names, and Apple logos are trademark property of Apple, Inc.

The content of this training is for iTech training within iCracked, Inc. Users of this training program are not permitted to copy, sell, reproduce, distribute, or otherwise share this content, either in part or as a whole, with others. Misuse of the content of this training will be viewed as a violation of any license or

employment agreement with iCracked.

iPhone 4 CDMA

iCracked likes to stay on the safe side of repairs, and by using ESD (Electrostatic Discharge) safe tools and equipment, you can be sure to avoid static damage to your mobile device.

ESD damage is difficult to diagnose as its effect isn’t usually immediately apparent, but sensitive sections of the logic board can nevertheless get weakened by static, and in turn become non-functional over time. Whether you are replacing a touch screen digitizer or an LCD screen, doing your repair with ESD safety in mind can save the long-term circuitry and functionality of your device.

ESD SAFETY!

iPhone 4 CDMA

EYE SAFETY!

It is important that you understand that Safety glasses should be worn when working on any iOS device.

Eye injuries are very common. Every day an estimated 1,000 people suffer an eye injury at work. Approximately 10% of these injuries are severe enough to require days away from work to recover. While the financial cost of these injuries are substantial, no dollar figure can adequately reflect the personal toll these incidents take on the injured employee.

iPhone 4 CDMA

GLOSSARYGSM - Acronym for Global System for Mobile Communica-tion. It is another network standard (like CDMA) used by carriers such as T-Mobile and AT&T.

Home button - The physical button that is found on the bottom of the iPhone screen.

Power/Sleep/Wake Button – Located at the top of the iPhone. Long press turns on from being powered off. When powered on, a quick tap will wake the screen and light up the LCD. When in-use a quick tap will place the unit in sleep mode, turning off the LCD and digitizer.

iOS - Apple’s Operating System that runs mobile devices. It has many versions, like iOS 2, 3, and 4.

Ambient Light Sensor – Detects the amount of UV light and dims the LCD for best viewing.

SIM Card - Subscriber Identity Module is an on-board memory card that identifies a user. You can swap GSM SIM cards between handsets.

Digitizer - Thin capacitive touch film on glass that converts analog touch signals to digital reactions by the processor.

Capacitive Touch - Screens that use a layer of capacitive material to hold an electrical charge; touching the screen changes the amount of charge at a specific point of contact. In resistive screens, the pressure from your finger causes conductive and resistive layers of circuitry to touch each other, changing the circuits’ resistance.

Standoff Screw - A standoff is a threaded separator of defined length used to raise one assembly above another.

iPhone 4 CDMA

TOOLS AND PARTS

• ESD-Safe Nylon Spudger• ESD-Safe Tweezers• ESD-Safe #00 Phillips Screwdriver• ESD-Safe 1,8x40 Flat Head screwdriver• iPhone Pentalobe Screwdriver• Phillips #000• iSesamo or Plastic opening tool• Metal Spudger

• Replacement Display Assembly• Proximity Cover Foam• Display Adhesive set

Tools Required: Parts Needed:

iPhone 4 CDMA

CARRIER CAPACITY BLACK WHITEA

1349

Verizon (CDMA) 8 GB MD146LL/A MD200LL/A

Verizon (CDMA) 16 GB MC676LL/A MC677LL/A

Verizon (CDMA) 32 GB MC678LL/A MC679LL/A

MODEL NUMBERS

iPhone 4 CDMA

IDENTIFY DEVICE

NOTE: The iPhone 4 CDMA is the only iPhone that does not have a SIM card tray or a SIM card.

iPhone 4 CDMA

• Before working on any iOS device, make sure to test all of the functions that are described in the iTech app.

• Power off the device before performing any repairs!

• If you have any questions before starting a repair, contact your iTech manager or the SOS Hot line at 855-442-7225.

IMPORTANT!

iPhone 4 CDMA

Use the iTech application to complete the Pre-Repair checklist; this checklist must be completed and verified by the customer prior to starting the repair.

The pre-repair checklist is your way of provid-ing proof of what did or did not function prior to repair, which is why its so important to use the app and have the customer verify and sign.

NOTE: An easy way to test the proximity sensor is activate voice control and start talking. If you place a finger over the ambient light sensor hole just above ear speaker grill, the screen should go dim.

REPAIR PREP

iPhone 4 CDMA

Hold the power/sleep button down until “slide to power off” shows up on the screen. Slide the arrow from left to right.

If the digitizer is not functioning: Power off the iPhone by holding down both the power/sleep button and the home button. Continue holding down as the Apple™ logo appears until the screen goes black.

If the power button does not function:Using assistive touch, tap the white bubble > Device > press and hold “Lock Screen” until the “slide to power off” drops down, and then slide the arrow from left to right.

POWER DOWN TO BEGIN

iPhone 4 CDMA

Remove the two Pentalobe or Phillips screws located on the left and right side of the dock connector port.

NOTE: Some iPhone 4 GSM have Phillips Head screws instead of Pentalobe screws.

QTY MATERIAL2 3.6 mm Pentalobe screw

Remove Dock Screws

1step

iPhone 4 CDMA

Slide the rear panel toward the top of the iPhone until it stops, then lift to remove.

Slide Back

2step

iPhone 4 CDMA

Completely lift off and remove the rear panel and set aside.

Remove Back

3step

iPhone 4 CDMA

Remove the single Phillips head screw holding the battery connector in place.

NOTE: Disconnect the battery connector before lifting the battery in order to prevent any possible electrical damage to the iPhone.

Disconnect Battery

4step

QTY MATERIAL1 1.5 mm Phillips screw

iPhone 4 CDMA

Use the flat end of the nylon spudger to lift between the battery and battery connector. Gently lift the connector upward using the battery as leverage.

Disconnect Battery

5step

iPhone 4 CDMA

Lift the plastic pull tab to remove the battery.

Remove Battery

6step

NOTE: If the plastic pull tab breaks or is missing, use the flat end of the nylon spudger to gently pry out the battery by inserting the spudger between the lower outside corner of the battery and the frame, and lifting.

iPhone 4 CDMA

If it is still there, fold the plastic pull-tab over and stick it to the adhesive remaining on the frame to keep it from getting in your way during the repair.

Set Pull Tab

7step

iPhone 4 CDMA

Remove the five screws holding the EMI shield in place.

DO NOT remove the shield.

Five Screws

8step

# QTY MATERIAL1 3 1.3 mm Phillips screw2 1 1.5 mm Phillips screw3 1 2.4 mm Phillips screw

1.

1.

1.

2.

3.

iPhone 4 CDMA

Rotate clockwise from the upper edge of the shield to unlatch the bottom retaining bracket.

Rotate EMI Shield

9step

iPhone 4 CDMA

Pull the bottom tabs of the EMI shield out from the slots cut into the mid-plate of the logic board.

You may then remove the EMI shield from the phone.

EMI Tabs

10step

iPhone 4 CDMA

Remove the single 1.5mm Phillips screw holding the Wi-Fi EMI shield in place.

Wi-Fi Shield

11step


iPhone 4 CDMA

Using tweezers, remove the Wi-Fi EMI shield clip by lifting upward on its larger end.

Remove Shield

12step

iPhone 4 CDMA

Remove the two dock connector flex cable retaining plate screws and the plate.

Flex Cable Screws

13step


iPhone 4 CDMA

IMPORTANT!When disconnecting the flex cables that are plugged into the logic board take your time and look. You can easi-ly render a logic board irreparable by knocking off small components on the logic board.

Carefully look closely at each connector and lift with the spudger only on the underside of the cable cap.

iPhone 4 CDMA

Use the pointed end of the nylon spudger to lift the connector on the side closest to the lower shield.

Peel back until adhesive is free then roll outward as shown.

CAUTION: The charging port flex cable is held in place with adhesive. Be gentle when pulling it off as you don’t want to tear the cable.

Disconnect Charging Port

14step

iPhone 4 CDMA

Remove the single screw holding the service antenna retaining plate in place.

Use tweezers to lift and remove the service antenna retaining plate.

Remove Antenna Plate

15step


iPhone 4 CDMA

Use the pointed end of the Spudger to disconnect the antenna connector.

Disconnect Antenna

16step

iPhone 4 CDMA

Gently reposition the service antenna from the installed EMI shield so that you may freely work on the logic board.

Reposition Antenna

17step

iPhone 4 CDMA

Use the pointed end of the nylon spudger. Slide the spudger underneath the flex cable approximately 2mm and lift upward to disconnect the rear-facing camera from the logic board as shown.

Disconnect Rear Camera

18step

iPhone 4 CDMA

Disconnect the audio control cable from the logic board using the pointed end of the nylon spudger at the left center of the connector as shown.

Disconnect Audio Control

19step

iPhone 4 CDMA

Disconnect the power/proximity flex cable using the pointed end of the nylon spudger at the left center of the connector as shown.

Disconnect Power/Prox

20step

iPhone 4 CDMA

Disconnect the front-facing camera flex cable using the pointed end of the nylon spudger at the left center of the connector as shown.

Disconnect Front Camera

21step

iPhone 4 CDMA

Use the pointed end of the nylon spudger to disconnect the digitizer flex cable from the left corner.

Disconnect Digi Cable

22step

iPhone 4 CDMA

Disconnect the LCD flex cable using the pointed end of the nylon spudger at the left center of the connector as shown.

Disconnect LCD Cable

23step

iPhone 4 CDMA

Disconnect the Wi-Fi flex cable connector by lifting on its upper left corner.

Disconnect Wi-Fi Cable

24step

iPhone 4 CDMA

Use tweezers to remove the rear-facing camera.

Remove Rear Camera

25step

iPhone 4 CDMA

Take a quick look over the logic board for dirt, debris, or any possible damage.

Remove the three standoff screws shown using a 1,8x40 Flathead Screwdriver.

Three Logic Board Screws

26step

# QTY MATERIAL1 1 4.8 mm Standoff screw2 2 3.6 mm Standoff screw

1.

2.

2.

iPhone 4 CDMA

1. Remove the sticker on the upper left corner of the logic board (beneath the camera). Set aside to use in reassembly.

2. Remove the single Phillips head screw.

3. Remove the gold grounding clip with tweezers.

Grounding Clip

27step


1.

2. 3.

iPhone 4 CDMA

Remove the single Phillips head screw from the lower left side of the logic board just above the vibrator motor.

One Logic Board Screw

28step


iPhone 4 CDMA

Lift the lower edge of the Logic Board to a 30-degree angle with respect to the iPhone.

Pull it toward you to remove it.

Remove Logic Board

29step

iPhone 4 CDMA

Remove the vibrator motor by sliding an iSesamo or metal spudger tool under the flex cable to break the adhesive loose.

Remove Vibrate Motor

30step

iPhone 4 CDMA

Use a #00 Phillips screwdriver to remove the screws on the speaker.

Speaker Screws

31step


iPhone 4 CDMA

Use tweezers to remove the plastic bracket from the left side of the speaker.

Speaker Bracket

32step

iPhone 4 CDMA

Rotate the loud speaker upward to remove.

Remove Speaker

33step

iPhone 4 CDMA

Remove the four corner screws on the inner edge of the frame.

Four Corner Screws

34step


iPhone 4 CDMA

Loosen the 6 large-headed center screws with one complete 360° turn of the screwdriver.

NOTE: Although the screws can be removed, it’s easier and faster to replace the LCD assembly if you simply loosen and leave them in place.

Six Frame Screws

35step


iPhone 4 CDMA

Turn the phone around and insert the iSesamo tool at the upper right corner of the iPhone. Work your way around the phone in a clockwise motion, separating the display and frame.

Take caution near the home button area. Stop at the upper left corner.

NOTE: NEVER use the iSesamo tool at the top of the iPhone near the front camera and proximity sensor!

Separate the Assembly

36step

iPhone 4 CDMA

Carefully pull the display assembly away from the frame.

The LCD and digitizer flex cables are routed through the mid-plate.

Separate the Assembly

37step

iPhone 4 CDMA

Now you have separated the broken screen and will prepare to install the new screen.

In most cases the glass is shattered. The fastest way to clean up the bits and pieces of glass is to peel the adhesive that the glass is stuck to off the frame. Apply new adhesive stickers onto the frame.

REASSEMBLY PREP

iPhone 4 CDMA

Peel the Front-Facing camera centering ring off of the old LCD assembly.

Align and drop the centering ring into the front-facing camera on the new LCD assembly.

REASSEMBLY PREP

iPhone 4 CDMA

IMPORTANT!Apply a new proximity sensor foam over the ALS (Auto-light Sensor) and proximity sensor.

This simple step will fix 95% of all proximity sensor issues!

iPhone 4 CDMA

Transfer the LCD and digitizer foam pads from the original LCD and digitizer cable if not pre-installed on the replacement display assembly.

This simple steps prevents the connectors from accidentally popping off, as the EMI shield applies force on the pads to keep the cables properly connected.

REASSEMBLY PREP

iPhone 4 CDMA

Check the mid-plate frame, and remove any glass or debris that may have fallen. Failure to clear this area could fracture the LCD upon reassembly.

Clean around the frame using 91% alcohol and a brush or an alcohol prep-pad.

Remove any debris around the home button using alcohol and brush.

Inspect the home button to see if it should be replaced.

REASSEMBLY PREPINSPECTION AND CLEANING

iPhone 4 CDMA

Remove the protective cover on the back of the new display assembly.

WARNING: Failure to remove the protective cover from the mirrored back of the display assembly will damage the LCD. There is a thermal pad installed on the iPhone frame that absorbs the heat from the LCD and disperses it though the frame, preventing the LCD from overheating.

Remove Cover

38step

iPhone 4 CDMA

Guide the LCD and Digitizer flex cable’s through the opening in the mid-frame.

Pay special attention to the digitizer cable loop; this tends to get caught.

NOTE: You will know that both cables are routed correctly through the mid-frame if they are of equal length. If one cable is shorter than the other, then the flex cable is most likely caught on the Mid-Frame.

Cables Through Midframe

39step

iPhone 4 CDMA

Insert the top corners of the display assembly first.

Top Corners First

40step

iPhone 4 CDMA

Verify that the LCD and digitizer flex cable equal height.

If one cable is shorter than the other, then the flex cable is most likely caught on the Mid-Frame. Pull the display assembly back and correct the problem.

Verify Cables

41step

iPhone 4 CDMA

On the inside frame, tilt the iPhone sideways to get the washers to drop onto the screw heads. Make sure that the flat washers are on the outside of the center holding plate, not touching the frame.

The order should be: 1. frame2. assembly holding plate3. washer4. screw head

Set Screen Assembly

42step

1.2.3.4.

NOTE: Use tweezers to gently push the tabs against the frame.

iPhone 4 CDMA

Lay the display assembly against the frame, and then lay the iPhone down on a flat surface. Tighten the middle left and right side center screws.

DO NOT tighten the other center screws at this time.

Tighten Side Screws

43step

iPhone 4 CDMA

Insert and tighten the four corner screws using a #00 Phillips screwdriver.

Keep the iPhone down on a flat surface, and maintain steady pressure on the corner you’re working on.

Insert Corner Screws

44step


iPhone 4 CDMA

Tighten the remaining four side screws, and ensure that all ten screws are now tight.

Check the frame and ensure the display assembly is sitting flush against it.

Reinstall the sticker previously set aside on the upper left corner.

Tighten Remaining Screws

45step

iPhone 4 CDMA

Align the mount over the screw hole and reapply the vibration motor into the frame.

NOTE: Inspect the springs of the vibration motor to ensure that they are not damaged or bent.

Align Motor

46step

iPhone 4 CDMA

Verify the lower microphone rubber boot has not rolled out of its housing. If it has fallen out of place, reinsert it.

Check Microphone Boot

47step

iPhone 4 CDMA

Insert the speaker into the bottom of the iPhone at a 45-degree angle.

Install Speaker

48step

iPhone 4 CDMA

Use the flat end of the plastic Spudger to ensure that the 4 metal tabs are dropped into the mid-plate area.

NOTE: The speaker will spring upward if constant pressure is not maintained during reinstallation until screws are reinstalled.

Check Tabs

49step

iPhone 4 CDMA

Insert and tighten the right side Phillips screw. Insert the plastic bracket on the left side, install and tighten the Phillips screw on the left side.

NOTE: The speaker will spring upward if constant pressure is not maintained during reinstallation until screws are reinstalled.

Speaker Screws

50step


iPhone 4 CDMA

Use the flat end of the plastic Spudger to re-shape the LCD and digitizer flex cables prior to inserting the logic board.

Form The Cables

51step

iPhone 4 CDMA

Ensure that the flex cable bumper is installed on the logic board.

The bumper prevents the LCD cable from getting damaged or cut on the sharp edges of the logic board.

Flex Bumper

52step

iPhone 4 CDMA

Insert the square tab at the top of the logic board into the cut shelf of the iPhone frame at about a 30-degree angle.

Gently lay the logic board flat, making sure none of the flex cables are in the way.

Insert Logic Board

53step

iPhone 4 CDMA

54step

Use a 1,8x40 flat head screwdriver to install the three standoff screws beginning with the top, center, and then the bottom.

Three Logic Board Screws

# QTY MATERIAL1 1 4.8 mm Standoff screw2 2 3.6 mm Standoff screw

1.

2.

2.

iPhone 4 CDMA

Set the rear-facing camera grounding clip in place. The rear-facing camera grounding clip arm should face out to the left when installed correctly. Insert and tighten the single Phillips screw with a #00 Phillips screwdriver.

Replace the sticker removed during the disassembly back over the screw.

Grounding Clip

55step


iPhone 4 CDMA

56step

Remove the single Phillips head screw from the lower left side of the logic board just above the vibrator motor.

One Logic Board Screw


iPhone 4 CDMA

Connect the Wi-Fi antenna flex cable by pushing down until it “clicks” into place.

Connect Antenna Flex

57step

iPhone 4 CDMA

Set the Rear-Facing Camera in the upper left corner. Align and connect the rear-facing camera flex cable to the logic board.

Insert Rear Camera

58step

iPhone 4 CDMA

Align and connect the LCD flex cable

Note: If a foam pad is not installed, transfer it from the original LCD assembly.

Connect LCD Flex

59step

iPhone 4 CDMA

Align and connect the digitizer flex cable into its appropriate connection slot.

Note: If a foam pad is not installed, transfer it from the original LCD assembly.

Connect Three Cables

60step

iPhone 4 CDMA

1. Align and connect the front-facing camera flex cable.

2. Connect the power/proximity flex cable.

3. Align and connect the audio control flex cable.

Connect Three Cables

61step

1.

2.3.

iPhone 4 CDMA

Route the cellular service antenna around through the shield and connect to the button on the logic board.

Install the antenna retaining clip. Then insert and tighten the Phillips screw.

Place Charging Plate

62step


iPhone 4 CDMA

Align and connect the charging port flex cable to the logic board.

Connect Charging Cable

63step

iPhone 4 CDMA

Insert the Wi-Fi antenna retaining plate. Install and tighten the Phillips screw.

NOTE: The “V” in the retaining plate goes into the body.

Five EMI Screws

64step


iPhone 4 CDMA

Insert the two lower tabs of the EMI shield into the shield cover. Then lay the shield flat and align the screw holes.

Install EMI Shield

65step

iPhone 4 CDMA

66step

Install and tighten the five Phillips screws holding the EMI shield in place.

Five Screws

# QTY MATERIAL1 3 1.3 mm Phillips screw2 1 1.5 mm Phillips screw3 1 2.4 mm Phillips screw

1.

1.

1.

2.

3.

iPhone 4 CDMA

Set the charging port flex cable retainer plate on top of the charging port flex cable.

Insert and tighten the two Phillips screws.

Connect Battery

67step


iPhone 4 CDMA

Peel back the battery removal tab and lay the battery back in place.

Insert Battery

68step

iPhone 4 CDMA

Align and connect the battery back onto the connector located on the logic board.

Insert and tighten the single Phillips screw.

Insert Battery

69step


iPhone 4 CDMA

1. Place the rear cover on the frame leaving about 2mm of space at the bottom of the phone.

2. Then slide the panel down toward the charging port.

Place Rear Glass

70step

1.

2.

iPhone 4 CDMA

Install and tighten the two Pentalobe screws.

Two Bottom Screws

71step

QTY MATERIAL2 3.6 mm Pentalobe screw

iPhone 4 CDMA

Power On the device and test all functions using the Post-Repair Checklist.

NOTE: This checklist is signed by the customer verifying the condition of the device before and after the repair. The final check and signature will start the customers warranty based on the serial number of the device being inputted into the iTech app, which is located in Settings> General> About> Serial Number.

Test Device

72step

iPhone 4 CDMA

TROUBLESHOOTING

• Check date and time. If incorrect, iPhone can not connect to carrier to validate • Check that the service antenna is properly plugged in• Inspect the antenna for damage• Make sure the four tabs on the loud speaker are properly tucked in and touching the mid-frame

• The most common reason for an iPhone not charging is dirt, lint or debris surrounding the 30 pin charging port, keeping the charging cable from seating correctly• Check the battery connector• Check that the charging port is properly seated• Inspect battery flex cable for a tear

“Searching” is Displayed in Upper Left Corner:

iPhone Will Not Charge

• Check that the customer has a valid and open account• Make sure the cellular antenna is properly connected to the logic board• Means it is talking to the towers but can not pull proper signal

Stuck in “No Service” Mode

• Install Proximity sensor isolation foam between midframe and Digitizer• Check Power/Proximity cable for tear/damage

Display Won’t Dim During Call

• Home button Flex is likely damaged• Dock Connector flex cable is not properly seated

Home Button Not Working

iPhone 4 CDMA

TROUBLESHOOTING

• Check the microphone boot is in-serted into the frame• Check to see if the microphone boot is pinched under the loud speaker• Inspect the charging port cable to see if the microphone is damaged

• #1 cause is clogs in the hole in the frame next to the headphone jack• Customer’s case could be covering the upper microphone port• Check the headphone jack cable, make sure it’s plugged in, inspect for tear or damage to cable

• Check that the front-facing camera cable is connected to the logic board.• Make sure the flex cable was not punctured by the EMI shield.• Inspect the logic board for damaged or missing components.

• Check that the rear-facing camera is connected to the logic board• Inspect the logic board for damaged or missing components

• Indication of major hardware failure• Inspect cables and battery for damage• Check for water damage• Call the SOS Helpline 1-855-442-7225

Lower Microphone Not Picking Up Sound:

No Audio Input Via Speaker-phone or Video Recording

Front Cam Shutter Won’t Open

Rear Cam Shutter Won’t Open

“Connect to iTunes” Boot

Documents

iPhone 4 CDMAecx.images-amazon.com/images/I/B10WLQ3bPPS.pdf · iPhone 4 CDMA iCracked likes to stay on the safe side of repairs, and by using ESD (Electrostatic Discharge) safe tools