Chapter 7 331
Replacing Major Assemblies
A16 Processor/Video Board and A16A1 Memory Board Assembly
Removal
1. Remove the instrument cover assembly. Refer to the “Instrument
Cover.” removal procedure.
2. Place the analyzer on the work surface with the bottom side facing
up.
3. If the instrument is equipped with Option 041 or Option 043:
• Remove the five screws securing the IO connector to the IO board.
• Remove the four screws (4) that secure the A40 or A41 IO board
assembly.
• Remove the A40 or A41 I0 board assembly (5).
4. Detach the instrument rear frame from the chassis. Pull the rear
frame back so that the A16 Processor/Video Board assembly is
completely exposed.
5. Disconnect the W14 ribbon cable (1) from A16J2 and A25J4. See
Figure 7-14.
6. Remove the four screws (2) that secure the A25 Counter-Lock
assembly.
7. Remove the A25 assembly (3).
8. If the instrument is equipped with Option 041 or Option 043.
9. Remove the seven screws (6) that secure the A16 assembly.
CAUTION The A16 assembly may be damaged if it is placed on a conductive
surface. Use a static-safe workstation. Ensure that the assembly is not
placed on any conductive material.
10.Remove the A16A1 Memory board assembly and place in a
static-safe container.
11.Remove the A16 assembly and place it in a static-safe container.
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