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CHAPTER 2
identifications of Circuit Boards
N&A {(NICAM) BOARD.
.
[FOR (GKI)NA, (HKN)]
A2 (A2) BOARD [FOR (AU)]
J&U (MPX AUDIO)BOARD
1. Before Starting Disassembly
"NCM (TAPE NAVIGATIN) *
BOARD
1) Unplug the power cord from the AC outlet.
2) [Removal procedure]
Ifa special procedure is required when dismantling any
component, it is indicated using numbers. Follow the °
numbers ((1),(2),(3) ...) shown in the illustrations.
[Reinstallation procedure]
fins
Reinstall each component in the reverse order to removal
when otherwise not specified.
:
;
3) Insert card connectors securely all the way as they are
of the direct insertion type.
LOv (LOD/JACK)
BOARD"
-"
FST (FRONT/SHUTTLE)
BOARD."
MAS (MAIN)
7
BOARD
2. Disassembly Method
Fig.1-1
When replacing defective parts, first refer to the "Parts hierarchy chart". shown below, This chart shows the
'procedure for parts removal when replacing defective parts,
.
a
'[How to use the parts hierarchy chart]
(1) Locate the part to be replaced.
(2) Check the parts in the ranks above the part to be replaced and start dismantling.
(3) Replace the defective part and reinstall the parts in the reverse order to that shown in the parts hierarchy chart.
_.. Parts Hierarchy Chart.
|....Note: Dismantie parts in the eject-state.
ss
Parts to remove
item
[
Parts to remove
_ _
Item
Top cover
2-1
]
Front panel
2-1
|
Cassette door
2.2
;
Oa
Buttons
2-2
"Bottom cover
_
2-1"
Front frame
2-3
Be
LCJ and FST board
2.3
Rear panel
US-FLméchanism
ea
NCM
and N&A, A2 or
J&U boards
eis
US mechanism/
MAS board assembly
US mechanism
_
26
2-5
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