Post Reply 
My HP Prime NW280AA in almost full exposure - Happy Season to all!
12-20-2015, 06:28 PM
Post: #1
My HP Prime NW280AA in almost full exposure - Happy Season to all!
It was about time to expose my Prime internals. Here we go.

Since I acquired it new in 2013, it has been protected by a HP-50G pouch.
The Prime fits nicely in it.

[Image: HP_Prime_001.jpg] [Image: HP_Prime_002.jpg] [Image: HP_Prime_003.jpg]


Started by undoing the two battery cover screws.

[Image: HP_Prime_004.jpg] [Image: HP_Prime_005.jpg] [Image: HP_Prime_006.jpg]

Then undid four screws to remove the back cover.
Used a plastic pry tool to help release the back cover lateral latches.
Undid ten small steel screws to release the keyboard PCB.
Undid four steel in black screws to release the main Processor/Display PCA.

[Image: HP_Prime_007.jpg] [Image: HP_Prime_009.jpg] [Image: HP_Prime_008.jpg]

(continued)

Jose Mesquita
RadioMuseum.org member

Find all posts by this user
Quote this message in a reply
12-20-2015, 06:29 PM
Post: #2
RE: My HP Prime NW280AA in almost full exposure - Happy Season to all!
Rising the Keyboard PCB gives access to the keyboard membrane.
Removing the KB membrane exposes the keyboard frame assembly.

[Image: HP_Prime_010.jpg] [Image: HP_Prime_011.jpg] [Image: HP_Prime_012.jpg]

To remove the Processor/Display assembly and expose the touch pad assembly, used a plastic pry tool to lift the white display frame.
Some force is needed as the frame is glued (sticky glue).
The exam three color LED devices are visible on the down middle right side of the 1st picture.

[Image: HP_Prime_013.jpg] [Image: HP_Prime_014.jpg] [Image: HP_Prime_015.jpg]

Main PCB. Some identified components:
- SAMSUNG S3C2416XH-40 SoC 400MHz ARM9 based processor.
- SAMSUNG K9F2G08U0C-SCB0 2Gbit 3.3Volt SLC Flash ROM memory (8-bit words).
- hynix H5MS2562NFR-E3M 256Mbit 1.8Volt DDR400 RAM memory (16-bit words).

By the way, Samsung has announced the EOL status for the SoC processor in the link above.
What will be the future of the HP Prime? A re-implantation of course!

[Image: HP_Prime_016.jpg] [Image: HP_Prime_017.jpg]

NOVATEK NT11002 1306-AD Touch panel controller, partially hidden by the flat cable.
This IC can be found in many Android devices as well.

[Image: HP_Prime_018_Novatek_NT11002.jpg]

Lifting the display assembly (in white color), reveals the touch screen input device (gray color).

[Image: HP_Prime_019.jpg]

Jose Mesquita
RadioMuseum.org member

Find all posts by this user
Quote this message in a reply
12-20-2015, 06:31 PM (This post was last modified: 12-21-2015 11:50 PM by jebem.)
Post: #3
RE: My HP Prime NW280AA in almost full exposure - Happy Season to all!
Extra details from the Processor PCB.
A Buzzer reference in the PCB.
And a UART serial I/O as well.

[Image: HP_Prime_020.jpg] [Image: HP_Prime_021.jpg] [Image: HP_Prime_022.jpg]

General parts view.
The Prime uses five key sets.

[Image: HP_Prime_023.jpg] [Image: HP_Prime_024.jpg] [Image: HP_Prime_025.jpg]

The three color LED lenses on the back cover.

[Image: HP_Prime_026.jpg]

The battery is a pretty standard component, available in most retail shops under the Samsung cell phones accessories section, although with a different reference number but as long as the specifications are similar it should be fine.
Specs: Lithium-Ion 3.7V 1500mAh (5.55Wh)
Battery model: 484461AR

Note:
Meanwhile I have tested the Prime with a 3-years old battery from a Samsung Galaxy SIII I9300 and it worked fine.
Samsung Battery Specs: 3.8V Li-Ion 2100mAh (7.98Wh)
Samsung Battery model: EB-L1G6LLU

[Image: HP_Prime_027.jpg] [Image: HP_Prime_028.jpg]

Reassembling the machine in reverse order was quite easy and took about 15 minutes.
It booted normally as soon as the battery was inserted in the compartment.

Happy 2015 Christmas holidays for all!
I'm signing out and go to the high mountains in the North of my little country, where the chilly wind and negative temperatures during the night keeps you inside home drinking with the family and celebrating the season.


[Image: HP_Prime_029.jpg]

Jose Mesquita
RadioMuseum.org member

Find all posts by this user
Quote this message in a reply
12-20-2015, 08:17 PM
Post: #4
RE: My HP Prime NW280AA in almost full exposure - Happy Season to all!
Feel like I've been looking at some centerfolds . .


Wink



Appreciate the, um, layout.

2speed HP41CX,int2XMEM+ZEN, HPIL+DEVEL, HPIL+X/IO, I/R, 82143, 82163, 82162 -25,35,45,55,65,67,70,80
Find all posts by this user
Quote this message in a reply
12-20-2015, 09:55 PM
Post: #5
RE: My HP Prime NW280AA in almost full exposure - Happy Season to all!
you've been stayin' up too late!
Find all posts by this user
Quote this message in a reply
12-21-2015, 12:54 AM
Post: #6
RE: My HP Prime NW280AA in almost full exposure - Happy Season to all!
Tongue Smile Smile

Jose Mesquita
RadioMuseum.org member

Find all posts by this user
Quote this message in a reply
12-21-2015, 04:14 AM
Post: #7
RE: My HP Prime NW280AA in almost full exposure - Happy Season to all!
EOL in the Samsung North America division. Doesn't impact Asia at all. Sorry! Smile

TW

Although I work for the HP calculator group, the views and opinions I post here are my own.
Find all posts by this user
Quote this message in a reply
Post Reply 




User(s) browsing this thread: 1 Guest(s)