SONY BKMA-7020
Instrukcja Serwisowa

2-5. Boards Replacement

2-5-4. PSW-61 Board
n When the PSW-61 board is replaced, replace a whole harness (H61) that is connected to PSW-61 board. 1. Disconnect the power cords from the rear panel. 2. Remove the cover. (Refer to Section 2-2-2.) 3. Remove the front panel (lower) and ornamental panel A. (Refer to Section 2-2-1.) 4. Open the front panel A. (Refer to Section 2-4-2.) 5. Remove the power supply units. (Refer to Section 2-42.) When there is one power supply, remove the blank panel. (Refer to Section 2-5-2.) 6. Remove the all HDD units. (Refer to Section 2-4-3.) 7. Remove the front stay. (Refer to Section 2-5-2.) 8. Remove the two power guides. (Refer to Section 2-52.) 9. Remove the IF positioning bracket. (Refer to Section 10. 11. 12. 2-5-2.) Unstick the filter from the front panel A. (Refer to Section 2-4-5.) Remove the LCD case lid. (Refer to Section 2-5-3.) Disconnect the two connectors (CN1, CN4) of the harness connected to the DP-269 board. (Refer to Section 2-5-3.) Remove the DP-269 board. (Refer to Section 2-5-3.) Remove the cable clamp. (Refer to Section 2-5-3.) Remove the PSW-61 board from the front panel A. (Refer to Section 2-5-3.) Cut the two harness clampers.

17. Disconnect the two connectors (CN1, CN10) of the harness connected to the AC-188 board . 18. Remove the all optional boards. (Refer to Section 2-55.) 19. Remove the four screws (BVTT 3x6) and two screws (PSW 3x6). 20. Pull out the noise filters until the harness is viewed. n Be sure not to pull out the harness connected to the noise filter. 21. Remove the four connectors of the harness connected to the noise filters. 22. Remove the PSW-61 board connected to the harness (H61).

BVTT 3x6

Noise filters

CN1 PSW 3x6

CN10

13. 14. 15. 16.

AC-188 board PSW-61 board

23. For installation, perform the removal procedures in reverse order. n Use the commercially available harness clamper .

PSW-61 board Harness clampers

MAV-70

2-21 (E)