TITLE
Model
DOCUMENT NO.
PAGE
CN70 Service Work Instructions
CN70A,CN70E
SWICN70-000
Page
21
of
45
OPERATION:
Keyboard PCB
There are two styles of keyboard/keypad assemblies that have been produced. Original production used a
conductive trace and puck keyboard/keypad combination (shown at left in picture below). Current production uses a
snap dome switch and plunger keyboard/keypad combination (shown at right in picture below).
Do not mix assemblies. A conductive trace keyboard PCBA should always be used with a conductive puck keypad.
A snap dome keyboard PCBA should always be used with a plunger style keypad. Units should be repaired with the
style of keyboard/keypad they were originally built with.
Tools Required
Description
Part Number
T10 Torx driver
T7 Torx driver
Non conductive pry tool
3M SP3010
Parts Required CN70A Keyboards
Item
Part Number
Description
Qty
option 224-850S-0803 Keyboard, A1 A2 QWERTY CN70 (conductive traces)
1
option 234-262S-0100 PCB,Keypad Qwerty A1-A2 Dome Assy (snap domes)
1
option 224-868S-0403 Keyboard, A1 A2 Numeric, CN70 (conductive traces)
1
option 234-265S-0100 PCB,Keypad Numeric A1-A2 Dome Assy (snap domes)
1
2
800-569-001
SCREW 2-56X3/16 FH TORX W/NYL CRES ROHS
4
3
655-306-001
Mic Cover
1
Parts Required CN70E Keyboards
Item
Part Number
Description
Qty
option 224-869S-0403 Keyboard,Cozumel B1 B2 Alpha Spare (conductive traces)
1
option 234-267S-0100 PCB,Keypad B1-B2 Qwerty Dome Assy (snap domes)
1
option 224-870S-0503 Keyboard, Cozumel B1,B2 Phone Spare (conductive traces)
1
option 234-269S-0100 PCB,Keypad Numeric B1-B2 Dome Assy (snap domes)
1
Removal
1. Remove the bottom housing assembly (refer to Bottom Housing operation).
2. Remove the core assembly from the top housing (refer to Core Assembly operation).
3. Using a T7 torx driver remove 4 screws that attach the keyboard PCB assembly to the core assembly.
4. Pull the keyboard PCB away from the core assembly unplugging it from its connections to the main logic board
and battery board.
