Disassembly for service
Back coverTo release screen GND cables from L-Board L11 & L12
connectors, insert a wire in both sides of connector and
Remove all the screws marked with an arrow()
pull upwards the cable, then remove the wire
from the back of the receiver.
(see Fig. 6)
Note: Screw configuration, type, and number
of screws vary depending on the
model of the receiver serviced and the
application;variousmodelsare
Pull
covered in this manual. Use samecable
Insert
hardware when reassembling theupwardswire
receiver.
?4 screws at the top edge of the receiver.
?3 screw by the A/V jacks.
?1 screw at each lower corner of the receiver.
Figure 6.L-Board screen GND cables release
?1 screw by the retainer plate of the AC power cord.
Speakers
A-Board - Main chassisSpeaker is secured to the cabinet?s front with 4
The A-Board assembly rest on a chassis tray alongscrews.
with the D-Board. Slide chassis tray out. GentlyKeyboardlift traypush button assembly
and pull out. Disconnect plug connectors; releaseFwaisrteened to the inside of the cabinet front.
ties and holders as required for complete chassis
Disassembly for CRT replacement
removal.
1. Discharge the CRT as instructed isnafethtye
1. A & D-Boards are secured to the chassis tray with
precautions(see page 2).
screws.
2. Disconnect the yoke (DY) plug, degaussing coil
2. The A-Board is mated to the D-Board by three
(DEG) plug and the CRT 2nd anode button from
flexible connectors: A5, A6 & A7 (D5, D6 & D7 on
the board.
the D-Board, respectively), A1, A2 & A3 (G1, G2 &
3. Remove the L-Board from the CRT socket and
G3 on the G-Board, respectively), D40 to G40. To
unplug the black wires (CRT dag ground) L11 &
remove either boards, unplug the connectors on
L12.
the A-Board.
4. Lift the main chassis (A-Board) and all mounted
Note: Some tie-wraps that secure the wire dressingsboards completely out with the CRT Board attached.
may need to be unfastened for chassis
removal.CRT replacement
1. Performdisassembly for CRT replacement
L-Board - CRT output
procedure.
Plugs into the socket on the CRT neck.2. Insure that the CRT H.V. Anode button is
To remove this board, first unplug the board frdiomscharged before handling the CRT. Read the
the CRT neck, then disconnect L1, L2 & L3safety precautio(nssee page 2) on handling the
connectors, to disconnect the focus F1 (red cablpie)cture tube.
& F2 (white cable) cables, pull the tab and r3.eleasRemeove the components from the CRT neck and
the cables, finally disconnect the screen cableplfracome the cabinet face down on a soft pad.
the D-Board fly-back.4. Note the original order for the CRT mounting
To reinsert back the cables, remember the origiharnaldware as they are remove from the CRT
position of cables, F1 (red cable) goes to A on tmhoeunting brackets at each corner of the CRT.
CRT socket and F2 (white cable) goes to B on th5.eRemove the CRT with the degaussing coil and the
CRT socket.dag ground braid attached.
Press tab
leftward to
Pull cables
release cables
upwards
Note:Afterservicingthereceiver,remember
to dress the cables.
Figure 5.F1 & F2 cables release
-11 - |
ACEC
