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7-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
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
/
W or less unless otherwise
4
specified.
•
¢
: internal component.
• C : panel designation.
Note:
Note:
Les composants identifiés par
The components identi-
une marque ! sont critiques
fied by mark ! or dotted
pour la sécurité.
line with mark ! are criti-
Ne les remplacer que par une
cal for safety.
Replace only with part
piéce por tant le numéro
number specified.
spécifié.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark: PLAY
• 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.
J
: CD
c : digital out
• Abbreviation
AED : North European
AUS : Australian model.
CND : Canadian model.
E2
: 120 V AC Area in E model.
E3
: 240 V AC Area in E model.
SP
: Singapore model.
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: internal component.
¢
• b : Pattern from the side which enables seeing.
1 2 3 4 5 6 7 8
•
1 2 3 4 5 6 7 8
: Solder bridge.
1 2 3 4 5 6 7 8
• Indication of transistor.
C
Q
These are omitted.
B
E
Q
B
C E
These are omitted.
Q
B
C
E
These are omitted.
– 23 –
• Waveforms
– BD Section –
– PANEL Section –
1 IC101 ^§ (XTAI)
1 IC701 %• (OSC0)
3.6 Vp-p
16.9344 MHz
2 IC101 %¡ (RFAC)
500 mV/DIV, 1 µs/DIV
+0.25
1.2
Vp-p
–0.20
3 IC101 $¡ (TE)
200 mV/DIV, 1 µs/DIV
Approx.
500 mVp-p
4 IC101 #ª (FE)
200 mV/DIV, 10 µs/DIV
Approx.
600 mVp-p
– MAIN Section –
1 IC501 #¡ (EXTAL)
3.6 Vp-p
10 MHz
CDP-CX220
2.5 Vp-p
480 ns
– 24 –
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