6
• Circuit Boards Location
SECTION 4
DIAGRAMS
PW.SW borad
DISPLAY board
JOG board
MAIN board
STANDBY board
PRIMARY board
SECONDARY board
4-1. NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
Note on Printed Wiring Board:
•
X
: parts extracted from the component side.
•
b
: Pattern from the side which enables seeing.
• Indication of transistor.
• Voltages and waveforms are dc with respect to ground
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
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
: FRONT/AUDIO IN
f
: REAR
E
: CENTER
j
: WOOFER
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
• Waveforms
– MAIN Board –
– DISPLAY Board –
3.4 Vp-p
8 MHz
4.3 Vp-p
4.19 MHz
Note:
The components identified
by mark
0
or dotted line with
mark
0
are critical for safety.
Replace only with part num-
ber specified.
Note:
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