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KT-990D
CONTENTS
DISASSEMBLY FOR REPAIR ........ssssscssesssessesseseseerereeees
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PE BOARD evinsscccetecscveonsnsceseuensadstedeaxesnavsracs
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BLOCK DIAGRAM...........:essssssssessseesensseerseneesseeseaeeenenseneneees
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SCHEMATIC DIAGRAM.........
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CIRCUIT DESCRIPTION...
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EXPLODED. VIEW wicisissssiiccsisvenincgelecdetanderasescscoscevdarizceecenies 41
ADJUSTMENT
PARTS LIST
REGLAGE..............
SPECIFICATIONS...
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DISASSEMBLY FOR REPAIR
(Remove the metallic cabinet before proceeding to the
following.)
1. Loosen the screw on the tuning control knob, and take
out the knob. Then, remove the hex nut attached to the
tuning shaft (@).
2. Remove
the 4 screws
fixing the front panel to the
sub-panel from the bottom side (@), disengage the 4 lugs
on the top side, and take out the front panel in the
direction of the arrow.
3. Remove the 2 screws fixing the sub-panel to the chassis
(@).
4. Remove the 2 screws fixing the Sub-Circuit Unit (X13-
5750-11) (A/4) to the metal fixture (@), and take out
the Sub-Circuit Unit in the direction of the arrow.
5. When attaching the Sub-Circuit Unit (X13-) (A/4), take
care to insert the PC board between the lugs on the
sub-panel (@).
6. Place a cloth on the set main body, place the sub-panel
on the cloth as shown in the illustration, disengage the
lugs fixing the Sub-Circuit Units (X13-) (B/4) and (C/4)
to the sub-panel (@). and take out the PC boards in the
direction of the arrow.
7. Remove the 5 screws fixing the rear panel to the chassis
(@).
8. Remove the 8 screws fixing the Tuner Unit (X05-34 20-
11) to the chassis (@).
9. Take out the Tuner Unit (XO5-) in the direction of the
arrow (@). Be careful not to hit the metal fixture (No. 718
in the exploded view diagram) at this time.
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