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Remove all the screws marked with an arrow(
from the back of the receiver, see Fig. 7.
Note: Screw configuration, type, and number of
screws vary depending on the model of the
receiver serviced and the application; various
models are covered in this manual. Use same
hardware when reassembling the receiver.
•
2 screws at the top edge of the receiver.
•
2 screws at the lower corners of the receiver.
•
1 screw by the a/v jacks.
•
1 screw by the fly-back assembly.
A-Board - main chassis (may vary)
1. Pull carefully the tab in the chassis rail, at the left
side of the main chassis, this will release the rail
from the cabinet. See Fig 5.
2. Slide the chassis and rail completely out of the
guide rails of the cabinet.
3. Stand the receiver on its edge. The underside of
the board is completely accessible for component
replacement.
Note: Some tie-wraps that secure the wire
dressings may need to be unfastened for chassis
removal.
4. When reassembly, place the chassis rail on the
cabinet, then place the main chassis, be sure is in
the rails at both sides, then push all the way to the
front.
Figure 4. Chassis rail detail
Disassembly for service
)
- 10 -
C-Board - CRT output
Plugs into the socket on the CRT neck.
To release the focus wire, use a flat tool to release
the tab in the socket, see Fig. 5 A , pull the wire-
look up and remove the wire by pulling away the
socket B, To re-insert, close the wire-look by
pushing until is secured with the tab, and insert the
wire into the socket
Figure 5. Focus wire release
Speakers
Speakers are secured to the front of the cabinet
with 2 screws in diagonal (opposite corners).
Keyboard push button assembly
Fastened to the inside of the cabinet front with 1 or
2 screws, according to the model's cabinet.
Disassembly for CRT replacement
1. Discharge the CRT as instructed in the safety
precautions (see page 2).
2. Disconnect the yoke (DY) plug and degaussing coil
(DEG) plug from the main board.
3. Unplug the CRT 2nd anode button.
4. Remove the C-Board from the CRT base and
unplug the black wire (CRT dag ground) C10.
5. Disconnect speakers plug SP from the A-Board.
6. Lift the main chassis (A-Board) completely out with
the CRT board attached.
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