4-6. CIRCUIT BOARDS LOCATION
SERVO board
SWITCH board
MAIN board
DISPLAY board
DIGITAL board
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.
Note: | Note: |
The components identi- | Les composants identifiés par |
fied by mark 0 or dotted | une marque 0 sont critiques |
line with mark 0 are criti- | pour la sécurité. |
cal for safety. | Ne les remplacer que par une |
Replace only with part | piéce portant le numéro |
number specified. | spécifié. |
|
|
•A : B+ Line.
•Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords.
•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.
F : FM
f : AM/MW/LW
J : CD
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1 |
| 5 |
| ||
|
| |
|
| 22.7µsec |
IC2 qg (RFAC) |
| IC1 ih (LRCK) |
2 |
| 6 |
| 0V | |
|
| |
Approx. |
| 474msec |
IC2 qh (FE) |
| IC1 o; (BCK) |
3 |
| 7 |
|
| |
| 0V |
|
Approx. |
| 16.9344MHz |
IC2 qk (TE) |
| IC1 of (XTAO) |
4 |
| 8 |
| ||
|
| |
7.6µsec |
| 12.288MHz |
IC1 rd (MDP) |
| |
| IC11 yg (XTXAL) |
— Main Board —
1
4.332MHz
IC101 4 (OSCO)
2
32.768kHz
IC501 uf (X0A)
3
3.68MHz
IC501 os (X0)
4
4MHz
IC901 4 (XOUT)
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.
•a : Through hole.
• : Pattern from the side which enables seeing. (The other layer’s 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. |
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