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Programmes After Market Services
NHP-2 Series Transceivers
8. Disassembly
Issue 1 05/2002 Nokia Corporation
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NHP-2
8. Disassembly PAMS Technical Documentation
Page 2 Nokia Corporation Issue 1 05/2002
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NHP-2
PAMS Technical Documentation 8. Disassembly
Contents
Disassembly of the NHP-2............................................................................................. 5
Preparation for Disassembly ........................................................................................5
Disassembly Tools .................................................................................................... 5
ESD Protection.......................................................................................................... 5
Step-by-Step Disassembly Instructions .......................................................................6
1. Remove the battery cover................................................................................... 6
2. Remove the battery. ............................................................................................ 6
3. Loosen and remove D-cover screws................................................................... 7
4. Separate A-cover assembly from D-cover assembly........................................ 7
5. Disassemble the A-cover assembly..................................................................... 8
6. Remove keymat. .................................................................................................. 8
7. Remove speaker gasket/power key and speaker. ............................................. 8
8. Remove the speaker. ........................................................................................... 9
View of A-cover side of phone (disassembled) ........................................................ 9
View of phone without the A-cover........................................................................ 10
9. Remove the screws from LCD assembly/PWB assembly. ............................. 10
10. Remove the PWB assembly/LCD assembly from the D-cover assembly... 10
PWB/LCD assemblies and D-cover assembly........................................................ 11
11. Loosen and remove microphone assembly from the PWB/LCD assembly. 11
12. Remove LCD assembly................................................................................... 11
Disassembled PWB/LCD assembly........................................................................ 12
Above is the PWB/LCD assembly, disassembled down to the components. ......... 12
D-cover assembly.................................................................................................... 12
13. Remove antenna. ............................................................................................. 12
D-cover assembly with internal antenna removed.................................................. 13
6385 Disassembled to the Component Level.......................................................... 13
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NHP-2
8. Disassembly PAMS Technical Documentation
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NHP-2
PAMS Technical Documentation 8. Disassembly
Disassembly of the NHP-2
Preparation for Disassembly
Disassembly Tools
Shown left to right: Torque-limiting screwdriver (torque set at 16.9N-cm), fiberglass soldering aid, and T6 torx driver.
ESD Protection
Some form of ESD protection should be used when handling the PWB and other electronic components. The photo above shows a wrist strap, which can be grounded to a
bench. This or some other form of ESD protection should be used when handling the
phone.
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NHP-2
8. Disassembly PAMS Technical Documentation
Step-by-Step Disassembly Instructions
1. Remove the battery cover.
1. Turn phone off.
2. Place phone in the palm of hand as shown above.
3. Place your other hand over the entire back, using firm pressure of the heel of your
hand to loosen and slide the battery cover down and away from the transceiver.
2. Remove the battery.
Peel the battery out of the phone by pulling outward on the top edge, as shown.
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NHP-2
PAMS Technical Documentation 8. Disassembly
3. Loosen and remove D-cover screws.
There are four screws to be removed: two in the battery recess and two at the bottom of
the phone. Using a T6 driver, loosen and remove the four screws.
4. Separate A-cover assembly from D-cover assembly.
While holding the phone as shown, gently rotate the A-cover away from the D-cover.
There is a snap at the top of the phone that will disengage as the A-cover is rotated.
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NHP-2
8. Disassembly PAMS Technical Documentation
5. Disassemble the A-cover assembly.
Now the A-cover assembly of the phone may be disassembled. Show above is the
A-cover assembly, along with the keymat assembly, power key/speaker gasket, speaker,
headset jack, and headset jack dust plug.
6. Remove keymat.
Starting from the top, peel the keymat out of the A-cover assembly.
7. Remove speaker gasket/power key and speaker.
Using the fiberglass soldering aid tool, gently pry upward on the speaker gasket with the
speaker still in place. DO NOT TOUCH THE SPEAKER SURFACE OR SPRINGS.
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PAMS Technical Documentation 8. Disassembly
8. Remove the speaker.
Being careful not to touch the spring contacts, gently apply pressure with a finger to the
backside of the speaker in the speaker gasket to remove it from the gasket. It is critical
that no damage is done to the thin membrane on the outside of the speaker. DO NOT
TOUCH THE SPEAKER SURFACE OR SPRINGS.
View of A-cover side of phone (disassembled)
The above photo illustrates the A-cover side of the phone disassembled down to the
component level.
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8. Disassembly PAMS Technical Documentation
View of phone without the A-cover
Above is the remainder of the phone once the A-cover has been removed.
9. Remove the screws from LCD assembly/PWB assembly.
Using a T6 screwdriver, remove the two 10mm screws from the top of the phone.
10. Remove the PWB assembly/LCD assembly from the D-cover assembly.
The PWB/LCD assembly can be lifted out of the D-cover assembly, as shown.
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PAMS Technical Documentation 8. Disassembly
PWB/LCD assemblies and D-cover assembly
Shown above are the two pieces, with screws removed.
11. Loosen and remove microphone assembly from the PWB/LCD assembly.
Using the fiberglass soldering aid, loosen the microphone assembly first from one side
and then work it gently out from the opposite side.
12. Remove LCD assembly.
Remove the LCD assembly from the PWB by pushing outward at the bottom of the metal
snap engagement tab on the metal frame. Once one side is disengaged, it should be possible to rotate the LCD assembly completely off of the PWB. Be careful not to touch or
loosen the elastomer connector between the LCD assembly and the PWB (not shown).
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Disassembled PWB/LCD assembly
Above is the PWB/LCD assembly, disassembled down to the components.
D-cover assembly
Shown above is the D-cover assembly with the internal antenna.
13. Remove antenna.
Lift the screw boss at the top edge of the internal antenna to pop the antenna out of the
D-cover assembly.
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PAMS Technical Documentation 8. Disassembly
D-cover assembly with internal antenna removed
The D-cover assembly, along with the internal antenna, is illustrated above.
6385 Disassembled to the Component Level
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8. Disassembly PAMS Technical Documentation
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