Replacing Crt/Dy Assembly - Sony DXF-20W Service Manual

1-5. Replacing CRT/DY Assembly

1. Loosen the MIC clamp screw to open the MIC clamp.
2. Remove the two screws (K2.6 x 5).
3. Remove the three hexagon cap screws (2.6 x 6) to
detach the upper chassis.
Upper chassis
PC board plate
A
MIC clamp
P2 x 3.5
Hexagon cap screw
4. Remove the two screws (P2 x 3.5) and remove the PC
board plate.
n
When attaching the PC board plate, be careful of its
orientation (A in the figure above).
5. Cut the binding yarn of the high-voltage cable.
6. Disconnect the high-voltage cable connector.
7. Disconnect the harnesses from the connectors CN4,
CN5, and CN6 on the VF-88 board.
Harnesses
Binding
yarn
High-voltage
cable connector
CN6
DXF-20W
K2.6 x 5
P2 x 3.5
Hexagon cap screws
CRT/DY assembly
CN5
CN4
VF-88 board
8. Remove the three screws (two : PTP2.6 x 8, one :
PTP2 x 6), and remove the CRT/DY assembly from
the VF tube assembly. Replace the CRT/DY assembly.
9. Install a new CRT/DY assembly to the VF tube
assembly so that the high-voltage cable comes upper.
CRT/DY assembly
PTP2.6 x 8
PTP2.6 x 8
10. Connect the high-voltage cable and harnesses by
reversing steps 6 and 7.
11. Arrange the harnesses referring to Section 1-6.
12. Perform electrical alignment referring to Section 2
"Electrical Alignment".
13. Reinstall the upper chassis by reversing steps 2 and 3.
n
Be careful so that the harnesses are not caught by the
upper chassis.
14. Close the MIC clamp and tighten the MIC clamp
screw.
VF tube
assembly
Lug
PTP2 x 6
1-3 (E)