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3-1. CIRCUIT BOARDS LOCATION
AC Board
DISPLAY Board
MOTOR Board
BLUE LED Board
SP SEL Board
HP Board
GEAR Board
VIDEO3 Board
JOG Board
FUNCTION SW Board
CTRL-A1 Board
BIAS Board
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SECTION 3
DIAGRAMS
PS Board
AMP Board
E VOL Board
DIGITAL Board
VOLUME Board
AUDIO A Board
AUDIO V Board
C VIDEO Board
PHONO Board
SP TM Board
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
For schematic diagrams.
Note:
• 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
specified.
•
%
: indicates tolerance.
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
Note : The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
No mark : FM
• 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.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
J
: CD
c : DIGITAL
I : PHONO
S VIDEO Board
7
7
For printed wiring boards.
Note:
• X : parts extracted from the component side.
•
: Through hole.
a
• b : Pattern from the side which enables seeing.
1
/
W or less unless otherwise
4
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
• Waveform
• Waveform
DIGITAL Board
DIGITAL Board
1 IC347 <z// (CLKO)
IC348 <z// (CLKO)
10MHz
2 IC357 3 (EXTAL)
20MHz
3 IC352 qh (XOUT)
7.28MHz
4 IC335 1
12.288MHz
DISPLAY Board
5 IC103 3 (EXTAL)
20MHz
TA-VA777E
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
3.8Vp-p
4.3Vp-p
4.8Vp-p
3Vp-p
4Vp-p
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