Led Board; Diagrams - Sony XM-SD14X Service Manual

2-4. LED BOARD

2 bracket (LED)
XM-SD14X
1 screw
(+BTP 3 × 6)
4 LED board
3 screw
(+P 2 × 5)
THIS NOTE IS COMMON FOR PRINTED WIRING
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)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1 / W or less unless otherwise
4
specified.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number 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 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: AUDIO
for printed wiring boards:
•
: Pattern from the side which enables seeing.
7 7
SECTION 3

DIAGRAMS

• IC Block Diagram
IC901 µPC494GS
16 15 14 13 12 11 10
ERROR REF. REG.
0.1V
OSC
ERROR
1 2 3 4 5 6
• Waveform
1
IC901 5 (CT)
3.4 Vp-p
18 µ sec
1 V/DIV, 10 µ sec/DIV
XM-SD14X
9
7 8