24
24
CDX-M8800/M8805X
3-6. WAVEFORMS
3-7. CIRCUIT BOARDS LOCATION
3-5. 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 (1/4), (2/4), (3/4), (4/4) and Key sections
no mark : FM
(
) : AM/MW/LW
<
> : 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
• 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.
• 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 por tant le numéro
spécifié.
Q
C
These are omitted
E
B
E
These are omitted
C
B
C
These are omitted
B
E
MAIN board
DISPLAY board
SENSOR board
SWITCH board
SERVO board
SPEAKER board
tuner unit
(TUX501)
SUB board
1
—
Display Board
—
(MODE: FM)
5Vp-p
8MHz
IC2
qa
(XOUT)
— Servo Board —
(MODE: CD PLAY)
1
2
Approx. 100mVp-p
IC3
wa
(TEI)
0V
IC3
wh
(A),
wk
(C)
3
4
5
6
16.9344MHz
IC3
uj
(XTAO)
7
0V
Approx. 100mVp-p
IC3
wd
(FEI)
Approx.
150mVp-p
IC3
wj
(B),
wl
(D)
IC3
ra
(RFACO)
Approx.
150mVp-p
Approx.
0.8Vp-p
2Vp-p
18.43MHz
IC4
ia
(X1)
1Vp-p
—
Main Board
—
(MODE: FM)
1
5Vp-p
2
32.768kHz
IC303
9
(XOUT)
3
6MHz
IC303
qa
(OSCOUT)
4.3MHz
IC550
4
(OSCD)
2.8Vp-p
2.8Vp-p
