Texas Instruments 660 - Manual (Page 119)

Field Service 6-25
6.5.15 Removing/Replacing the Main PWB Assembly
The procedure for removing and replacing the Power Supply PWB Assembly is as follows:
1. Turn off the computer; disconnect the AC power adapter (if attached), and
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2. Press the Cover Release Latch and open the notebook to a full 180 degree
position.
3. Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4. Remove the Heat Sink Assembly as described in Paragraph 6.5.7.
5. Remove the Cover-Display Assembly as described in Paragraph 6.5.9.
6. Remove the Top Cover Assembly as described in Paragraph 6.5.10.
7. Remove all PWB assemblies from the Main PWB Assembly and install on the
replacement Main PWB Assembly.
8. Remove the three large posts (one visible, one under the Power Supply PWB
and one under the Battery and HDD Transfer PWB). Note and record the
location and size of hex screws (posts) for use during reassembly.
9. Remove the four screws and carefully remove the Main PWB Assembly.
10. Reassembly is the reverse of Steps 1 through 9.
Figure 6-19 Removing/Replacing the Main PWB Assembly
Bottom
Case
Assembly
Main PWB
Assembly