Texas Instruments Extensa 60x Series Maintenance Manual page 110

4.
Refer to Paragraph 6.5.13 and remove the Power Supply Board Assembly.
5. Remove the five screws that secure the motherboard to the inside assembly
frame. Pull up on the Motherboard Assembly to release it from the inside
assembly frame (refer to Figure 6-23).
Figure 6-23 Detaching Motherboard from Inside Frame Assembly
6.5.18 Removing/Replacing FIR/Audio Board (65x Series)
Use the following procedure to remove/replace the FIR/Audio Board Assembly:
1. Separate the Inside Frame Assembly from the Base Assembly as described
in Paragraph 6.5.10.
2. Separate the inside frame assembly from the base assembly.
3. Refer to Figure 6-24 and remove the following connectors:
6-26 Field Service