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6
Replacing Assemblies
To remove and replace the On|Off key
C A U T I O N
76
Perform previous procedures:
•
"To prepare the instrument for disassembly"
page 48
•
"To remove and replace the cover"
•
"To remove and replace the front panel assembly"
page 64
•
"To remove and replace the LCD bracket assembly"
page 71
Using a Torx T6 screwdriver, remove the screw securing
6
the On|Off board to the front frame.
7
Using a 1/4- inch hex socket, remove the shoulder screw
securing the On|Off board to the front frame.
Remove/replace the keypad and board.
8
Wear ESD finger cots or use care not to touch the black pads on
keypad and on the keypad board. Finger oils can impair contact. If
necessary, carefully clean the contacts using alcohol and lint-free
swabs or wipes.
On|Off Board
Front
Frame
on page 52
T6 Screw (1)
On|Off
Cable
On|Off
Keypad
16900A, 16902A, and 16903A Service Guide
on
on
on
Hex
Shoulder
Screw
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Troubleshooting
