Note For Printed Wiring Boards And Schematic Diagrams - Sony CDX-656 Service Manual

6-3.

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : internal component.
f
• : 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
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• Circuit Boards Location
JACK board
SWITCH board
LSW board
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.
f
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
une marque 0 sont critiques
fied by mark 0 or dotted
line with mark 0 are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part pièce por tant le numéro
number specified. spécifié.
• A : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from CD changer controller.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD 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 PLAY
MAIN board
RF board
• Waveforms
– RF Board –
1 IC101 qh (FE) (CD play mode)
Approx.
100 mVp-p
2 IC101 qk (TE) (CD play mode)
Approx.
250 mVp-p
3 IC101 qg (RFAC) (CD play mode)
1.4 ± 0.3 Vp-p
19 19
CDX-656/656X
Ver. 1.1
– MAIN Board –
1 IC101 wh (MDP) (CD play mode)
1.8 Vp-p
7.5 µ s
2 IC101 yj (XTAO) (CD play mode)
4.2 Vp-p
59.1 ns
3 IC201 ia (X1) (CD play mode)
3.8 Vp-p
250 ns