ACTRE (ASUS Certificate Training of Repair Engineer)

Handheld System
Level 2
Hardware Skill
Statement of Confidentiality
All recipients of this document must treat this training material as
ASUS confidential and must not disclose it to any party other than
the recipients’ employees on a need to know basis, or other
individuals authorized under a written Confidential Disclosure
Agreement signed by ASUS and the recipient.
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Overview
 Chapter 1 Overview
 Chapter 2 Component
 Chapter 3 Disassembly skill
 Chapter 4 Precaution
 Chapter 4 Appropriate Tools
 Chapter 5 Disassembly Procedure
 Chapter 6 Assembly Procedure
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Overview
1. Earpiece receiver
2. Front camera lens
3. Light sense
4. LCD touch screen
5. Opera browse key
6. End/power key
7. OK key
8. Trackball
9. Start key
10. Call key
11. AnyTime Launcher key
12. Notification LED
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Overview
13. Camera lens
14. Output speaker
15. Battery compartment
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Overview
16. Volume key
17. Hold button
18. Micro SD card slot
19. Camera key
20. Stylus
21. Carrying strap hole
22. Built-in microphone
23. Reset key hole
24. Mini-USB connector
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Component
Component
The illustrations below show the components of ASUS P835
LCD Panel
The illustration below shows the LCD display panel. The P835 comes with 3.5’’ WVGA
LCD Panel.
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Component
Front case module
The illustration below shows the front case module. The P835 front case module
mainly including Front case + Touch panel
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Component
Middle CASE ASSY
The illustration below shows the middle case assy. The P835 front case module
mainly including:
 MIDDLE CASE
 MICROSD DOOR
 CAMERA KEY
 HOLD KEY
 VOLUME KEY
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Component
RF COVER ASSY
The illustration below shows the RF cover assy. The P835 RF cover assy mainly
including:
 RF COVER
 CAMERA RING
 CAMERA LENS
 SPEAKER MESH
Battery Cover ASSY
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Component
KB PAD ASSY
The illustration below shows the Keyboard pad assy. The P835 keyboard pad assy
mainly including:
 Keyboard assy
 Keyboard FPC
VIBRATOR
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Component
CAMERA MODULE BATTERY MODULE SPEAKER
RECEIVER STYLUS
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Component
MAINBOARD MODULE
BALL FOC
SUB board ANTENNA FPC
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Disassembly skill
Cautions
There are several cautions you should be aware of when
disassembling / assembling the device, especially for the new model.
For new models, please use the Service Guide or Service Manual for
your reference. Some special points will be indicated. This will help to
decrease the probability of damage.
Here are some suggestions if there is no Service Guide or Service
Manual at hand.
1. When you can not separate the cases, please observe the device to
see if there is any screw or hook that secure the cases. Please do not
disassemble the device if you feel the cases are hard to separate. Well
designed model should be easy to disassemble. There are always
special ways for disassemble the hard place.
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Disassembly skill
Hooks
Screws
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Disassembly skill
2. FPCs are always easy to be destroyed. Please pay much attention to it.
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Disassembly skill
3. When assemble the cases with the main board, please start from the
I/O side. Engage the I/O side first then press the other sides to fix the
whole module.
The I/O
Side
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Disassembly skill
4. When assemble the cases with the main board, please switch the hold
key first to make them match. (The hold key on the main board and on
the bottom case or on the top case.)
The Hold
Key
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Precautions
Precautions
Before you perform any service and/or repair on the device, please follow the
steps below first.
1. Be sure that the ASUS P835 is powered down.
2. Disconnect the AC plug from ASUS P835
3. Remove the battery
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Precautions
4. Remove all rings, watches and any other metal objects from your hands.
5. Wear a ground strap to protect the PDA from static discharge:
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Appropriate Tools
Appropriate Tools
The illustrations below show the appropriate tools that should be used for the Handheld service
and repair.
Phillips-head
Screwdriver
Use a Phillips-head screwdriver to fasten/remove the K- or B-typed screws.
Screwdriver (T5)
Tweezers
Use a pair of tweezers to remove/insert flexible cables.
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Disassembly Procedure
 Step 1
 Pry the edges of the RF cover. Pay attention to the two hooks on the
top of the cover. Then remove the RF cover from the device.
Hooks
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Disassembly Procedure
 Remove RF cover like below
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Disassembly Procedure
 Step 2
 Remove 4 screws on the middle case assy. Pry the top, left and right side of the
PDA phone to release the middle case assy from the hooks. Then open the middle
case assy and please do not remove it for the vibrator still connected with the main
board. Then disconnect the vibrator cable
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Disassembly Procedure
Hooks
Hook
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Disassembly Procedure
Hooks
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Disassembly Procedure
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Disassembly Procedure
 Step 3
 Remove the vibrator, speaker, volume key, camera key and Micro-SD
door from the middle case.
Vibrator
Speaker
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Disassembly Procedure
Volume Key Camera Key
Micro-SD Door
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Disassembly Procedure
 Step 4
 Carefully tear off the antenna FPC on the middle case assy.
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Disassembly Procedure
 Step 5
 Remove 2 screws on the main board. Open the LCD FPC connector
and disconnect the LCD FPC and the keypad FPC. Then open the touch
lens PFC connector and disconnect the touch lens FPC. Remove the main
board from the top case assy.
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Disassembly Procedure
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Disassembly Procedure
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Disassembly Procedure
 Step 6
 Remove 2 screws on the CMOS camera and remove it from the main
board.
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Disassembly Procedure
 Step 7
 Release the conductive tape and remove the camera from the main
board. Then separate the camera holder and the camera.
1 2
3 4
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Disassembly Procedure
 Step 8
 Remove the MIC rubber.
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Disassembly Procedure
 Step 9
 Remove 1 screw on the track ball and remove the track ball. Separate
the ball and the track ball support.
1 2
3 4
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Disassembly Procedure
 Step 10
 Disconnect the track ball FPC from the main board and remove it.
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Disassembly Procedure
 Step 11
 Release the LCD panel from the hooks and remove 2 pieces of top
conductive tape. Remove the LCD panel from the top case assy.
Top Conductive Tape
Hooks
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Disassembly Procedure
 Step 12
 Remove the receiver.
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Disassembly Procedure
 Step13
 Remove 2 screws in the top case assy and turn over the top case.
Then remove the top case skin and the keypad assy.
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Assembly Procedure
Assembly is carried out in the exact reverse sequence as the disassembly.
 Step 1
 Install keypad assy and the top case skin. Then turn over the top case
assy and secure 2 screws on it.
1 2 3
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Assembly Procedure
 Step 2
 Assemble the receiver.
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Assembly Procedure
 Step 3
 Install the LCD panel and arrange it the top case hooks. Then fix 2
pieces of top case conductive tape.
Top Conductive Tape
Hooks
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Assembly Procedure
 Step 4
 Install the track ball FPC and connect it with the main board.
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Assembly Procedure
 Step 5
 Assemble the track ball and the track ball support. Then install the track
ball and secure 1 screw on it.
1 2
3 4
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Assembly Procedure
 Step 6
 Assemble the MIC rubber.
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Assembly Procedure
 Step 7
 Assemble the camera and the camera holder. Then install the camera
on the main board. Fix the conductive tape well.
1 2
3 4
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Assembly Procedure
 Step 8
 Install the CMOS camera on the main board and fix 2 screws.
1 2
3
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Assembly Procedure
 Step 9
 Install the main board on the top case and connect the following FPCs:
LCD FPC, keypad FPC, touch lens FPC. Secure 2 screws on the main
board.
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Assembly Procedure
1 2
1 2
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Assembly Procedure
 Secure 2 screws
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Assembly Procedure
 Step 10
 Paste the antenna FPC.
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Assembly Procedure
 Step 11
 Install the Micro-SD door, volume key, camera key, vibrator and the
speaker on the middle case assy.
Micro-SD Door
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Assembly Procedure
Volume Key Camera Key
Vibrator Speaker
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Assembly Procedure
 Step 12
 Connect the vibrator cable with the main board and close the middle
case assy with the device. Please pay attention to the Hold Key on the
main board and the middle case. Switch them to the same direction first
in case of the damage. Secure 5 screws to fix the middle case.
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Assembly Procedure
Hold Key
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Assembly Procedure
 Step 13
 Install the RF cover. Please remember to push back the SIM card latch.
Latch
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Assembly Procedure
 Step 14
 Place the battery and install the battery cover.
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Assembly Procedure
 Step 15
 Insert the stylus.
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