20
HCD-TB10
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 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
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
a
: Through hole.
• : Pattern from the side which enables seeing.
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
•Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
•
∗
: Impossible to measure
•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
E : PB
a : REC
J : CD (Analog)
c : CD (Digital)
•Abbreviation
MX : Mexican model
KR : Korea model
TW : Taiwan model.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• Indication of transistor
C
B
These are omitted.
E
Q
B
These are omitted.
CE
B
These are omitted.
CE
• Waveforms
2 IC601 qd (XT2)
1 IC751 rf (XOUT)
2 V/DIV, 10 s/DIV
2 V/DIV, 20 ns/DIV
3 IC601 qh (CF2)
2 V/DIV, 40 ns/DIV
5 Q209 Collector
(TAPE REC mode)
4 IC102 ws (XOUT)
2 V/DIV, 100 ns/DIV
6 IC103 qf (XO)
1 V/DIV, 100 ns/DIV
5 V/DIV, 10 s/DIV
4.9 Vp-p
5.9 Vp-p
59 ns
30.5 s
4.5 Vp-p
100 ns
222 ns
5.0 Vp-p
231 ns
13.9 Vp-p
12.6 s
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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