AIWA CDC-X144 Service Manual - Page 9

Note For Printed Wiring Boards And Schematic Diagrams, Waveforms, Mode: Cd Play

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3-6. 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.) 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. • 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. Note: Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié. • A : B+ Line. • B : B- Line. • H : adjustment for repair. • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. • CD mechanism section no mark : CD PLAY • Main (1/2), (2/2) and Display sections no mark : FM ( ) : AM < > : CD PLAY ∗ : Impossible to measure • 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 PLAY F : FM f : AM/MW/LW a : AUX • Abbreviation CND : Canadian model. 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. (The other layers' patterns are not indicated.) Caution: Pattern face side: Parts on the pattern face side seen from the (Side B) pattern face are indicated. Parts face side: Parts on the parts face side seen from the (Side A) parts face are indicated. C Q BE These are omitted BE C These are omitted ECB These are omitted • Abbreviation CND : Canadian model. 3-7. WAVEFORMS - Servo Board - (MODE: CD PLAY) 1 1.2Vp-p 16.9344MHz IC1 wd (XTAL) 2 1.6Vp-p IC1 uj (AGCI) 3 0V Approx. 620mVp-p IC1 od (FEO) 4 0V Approx. 200mVp-p IC1 oh (TEO) CDC-R104/X104/X144 - Main Board - 1 2.2Vp-p 27MHz IC501 qs (OSCOUT) 2 1.8Vp-p 32.768kHz IC501 qg (XIN) 3 0.9Vp-p IC51 q; (XTO) 21 21

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21
CDC-R104/X104/X144
3-7. WAVEFORMS
3-6. 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.)
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.
•
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.
(The other layers' patterns are not indicated.)
•
A
: B+ Line.
•
B
: B– Line.
•
H
: adjustment for repair.
•
Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
•
CD mechanism section
no mark
: CD PLAY
•
Main (1/2), (2/2) and Display sections
no mark
: FM
(
)
: AM
<
>
: CD PLAY
∗
: Impossible to measure
•
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.
J
: CD PLAY
F
: FM
f
: AM/MW/LW
a
: AUX
• Abbreviation
CND
: Canadian model.
Caution:
Pattern face side:
Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
Q
C
These are omitted
E
B
E
These are omitted
C
B
C
These are omitted
B
E
• Abbreviation
CND
: Canadian model.
Note:
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
— Servo Board —
(MODE: CD PLAY)
IC1
uj
(AGCI)
1
2
16.9344MHz
IC1
wd
(XTAL)
1.6Vp-p
1.2Vp-p
Approx. 620mVp-p
IC1
od
(FEO)
3
0V
4
0V
Approx. 200mVp-p
IC1
oh
(TEO)
32.768kHz
IC501
qg
(XIN)
— Main Board —
1
2
27MHz
IC501
qs
(OSCOUT)
1.8Vp-p
2.2Vp-p
IC51
q;
(XTO)
3
0.9Vp-p