Sharp 34N-WF5H, Service Manual

Page: 7 / 87

7
34N-WF5H
REMOVING THE MAJOR PARTS
1. Remove the 13 lock screws off the rear cover.
2. Holding up the chassis frame, draw out the chassis about 5 cm (1.
31
/
32
inch) first, disconnect the
speaker leads from the signal Unit, and pull out the chassis all the way.
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Get the air vent tip cracked.
Degaussing Coil
Coil Holders
(4 locations)
Detaching the cathode ray tube
1. Detach the anti-magnetized coil from the four coil holders
that are at the cathode ray tube corners of the cabinet.
2. Remove the four pairs of screws and nuts off the cathode
ray tube, and detach the cathode ray tube. (The tube weighs
about 60 kg (132.2lbs).)
Cathode ray tube handling precautions
Discharging
There may be a build-up of high-tension static electricity at
the high-voltage electrode (covered with the anode cap on
top of the cathode ray tube). Before taking the anode out of
the cathode ray tube, get it discharged.
Carrying
The cathode ray tube weighs 60 kg (132.2lbs) or so and its
shape is awkward to fit your hands. Preferably make a two-
person team to carry and move the tube.
Disposal
The cathode ray tube is under high vacuum inside. Before
disposing of it, get the air vent tip at the tube’s neck socket
cracked in order to turn the tube to the atmospheric pressure
level.
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Cabinet B
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Cabinet A
Signal Unit Frame
AC Filter Unit Frame
Rear Panel
Power Unit Frame
Frame Holder
Note: Cabinet B mounting procedure and
precautions
1. Position the cabinet B in parallel with the
cabinet A. Start pushing in the cabinet B.
2. Insert the cabinet B until the clearance
between the cabinets A and B becomes 150
mm or so. Look into the terminal opening in
the back of the cabinet B to make sure the
tuner PWB and shield are out of contact with
the speaker guide boss.
3. Finally insert the coupling ribs of the cabinet
B in this order: left rib, top rib and right rib
when viewed from the back of the product.