HCD-DX150, HCD-DX170, HCD-DX250 (serv.man2) - Sony Audio Service Manual (repair manual). Page 2

2

For Schematic Diagrams.
Note:
• All capacitors are in µF unless otherwise noted.  (p: pF)

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.

• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground un-

der no-signal (detuned) conditions.

• Voltages and waveforms are dc with respect to ground in

service mode.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production
tolerances.
no mark : DVD STOP
It is as follows for MAIN SECTION (4/7), (6/7), (7/7).
no mark : DVD STOP (US, CND, MX)
   [      ]

: DVD STOP (E32, EA, SP, AUS)

• Voltages are taken with VOM (Input impedance 10 MΩ).
• Circled numbers refer to waveforms.

• Signal path.

F

: AUDIO

d

: TUNER

e

: AUDIO IN

• Abbreviation

AUS

: Australian model.

CND

: Canadian model.

E32

: 110 – 240 V AC Area in E model.

EA

: Saudi Arabia model.

MX

: Mexican model.

SP

: Singapore model.

For Printed Wiring Boards.
Note:
• X : parts extracted from the component side.
•         a

: Through hole.

•

: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

• Indication of transistor.

Caution:
Pattern face side:  Parts on the pattern face side seen from
(SIDE A)               the pattern face are indicated.
Parts face side:     Parts on the parts face side seen from
(SIDE B)               the parts face are indicated.

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.

Q

C

E

B

These are omitted

C E

B

These are omitted