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19
19
HCD-RV20/RV50/RV60
3-2. CIRCUIT BOARDS LOCATION
MAIN board
DRIVER board
SW board
VIDEO board
MOTOR (LD) board
MOTOR (TB) board
VIDEO OUT board
BD board
SENSOR board
TRANS board
POWER AMP board
JACK board
PANEL board
REMOTE board
1 STREAM LED board (RV20)
6 STREAM LED board (RV50/RV60)
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. 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.
•
%
: indicates tolerance.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: B– Line.
•
H
: adjustment for repair.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
no mark : FM
(
) : CD
[
] : TAPE
• 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
: FM
f
: AM
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
J
: CD
c
: digital out
L
: VIDEO
for printed wiring boards:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
x
: parts mounted on the conductor side.
•
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• Waveforms
– BD Board –
1
2
IC103
6
(A),
8
(C)
Approx.
160mVp-p
3
4
IC103
7
(B),
9
(D)
Approx.
160mVp-p
IC103
qg
(RFAC)
Approx.
1Vp-p
IC103
wk
(RFDCO)
Approx.
0.6Vp-p
– VIDEO Board –
1
33.8688MHz
IC505
<zb/>
(XTAO)
1.1Vp-p
2
29MHz
IC505
<x/n>
(CLKA)
0.6Vp-p
– PANEL Board –
1
2
8.64MHz
IC601
qg
(CF1)
32.768kHz
IC601
qs
(XT1)
1.2Vp-p
1Vp-p