Sony XM-SD12X Service Manual ▷ View online
5
XM-SD12X
SECTION 2
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
Note : Follow the disassembly procedure in the numerical order given.
2-1. BOTTOM PLATE
2-1.
BOTTOM PLATE
(Page 5)
(Page 5)
2-2.
MAIN BOARD SECTION
(Page 6)
(Page 6)
SET
2-3.
MAIN BOARD
(Page 6)
(Page 6)
2-4.
LED BOARD
(Page 7)
(Page 7)
3
bottom plate
1
three screws
(+BTP 3
x 8)
2
three screws
(+BTP 3
x 8)
6
XM-SD12X
2-2. MAIN BOARD SECTION
2-3. MAIN BOARD
2
three screws
(+BTP 3
x 8)
1
CN501
3
three screws
(+BTP 3
x 8)
4
three screws
(+BTP 3
x 8)
After unfastening the screw,
taping with the screw inserted
facilitates the work.
taping with the screw inserted
facilitates the work.
5
MAIN board section
heat sink (MAIN)
4
panel (front)
5
MAIN board
3
two screws
(+BTP 3
x 8)
1
screw
(+P 3
x 8)
2
screw
(+P 3
x 8)
7
XM-SD12X
2-4. LED BOARD
1
two screws
(+BTP 3
x 8)
4
ornamental plate assy
2
screw
(+BTP 3
x 6)
5
screw
(+BTP 3
x 5)
7
screw
(+P 2
x 5)
6
bracket (LED)
8
LED board
3
two screws
(+BTP 3
x 8)
8
XM-SD12X
IC901 µPC494GS
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
OSC
REF. REG.
ERROR
ERROR
0.1V
• IC Block Diagram
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
A
: B+ Line.
•
B
: B– Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from +12V and REM terminals.
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: AUDIO
for printed wiring boards:
•
: Pattern from the side which enables seeing.
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• Waveform
3 Vp-p
18
µ
sec
1
IC901
5
(CT)
1 V/DIV, 10
µ
sec/DIV
SECTION 3
DIAGRAMS
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