Philips 22PFS4232/12 Service Manual page 11

Figure 3-13 (For 4022 series)
3.2.3 Keyboard Control Unit
1. Release the connector from the SSB Board.
Caution: Be careful, the Keyboard is catch on the Back cover, please be careful to avoid damage the fragile connectors!
2. Remove all the fixation screws [1] from the keyboard control panel and take it out from the Back cover
When defective, replace the whole unit.
Figure 3-14