Diagrams - Sony HCD-EC55 Service Manual

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics and
tantalums.
1
• All resistors are in Ω and / W or less unless otherwise
4
specified.
• f : internal component.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés
fied by mark 0 or dot- par une marque 0 sont cri-
ted line with mark 0 are tiques pour la sécurité.
critical for safety. Ne les remplacer que par une
Replace only with part piéce portant le numéro
spécifié.
number specified.
• H : adjustment for repair.
• A : B+ Line.
• B : B– Line.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
– HI-AMP/LOW-AMP Section –
No mark: CD STOP
– DECK Section –
No mark: TAPE PLAY or TAPE REC
– Other Section –
No mark: CD PLAY
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER (FM)
J
: TUNER (AM)
f : CD
d : AUDIO
E : PB (TAPE)
a
: REC (TAPE)
• Abbreviation
AR : Argentine model
AUS : Australian model
CND : Canadian model
E2 : 120 V AC area in E model
E3 : 240 V AC area in E model
E51 : Chilean and Peruvian models
KR : Korean model
MX : Mexican model
RU : Russian model
SP : Singapore model
HCD-EC55/EC77/GX99
SECTION 7

DIAGRAMS

Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• f : internal component.
• : Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
• Indication of transistor.
C
Q
These are omitted.
B E
Q
B C E
These are omitted.
• Circuit Boards Location
EC77/GX99
DECK board
PANEL board
KEY-LEFT board
REG board
JACK board
KEY-CD board
EC55
DECK board
PANEL board
KEY-LEFT board
REG board
JACK board
KEY-CD board
29 29
HCD-EC55/EC77/GX99
(EXCEPT US, CND) HI-AMP board
MAIN board
LOW-AMP board
BD90 board
KEY-RIGHT board
(EXCEPT US,CND) HI-AMP board
MAIN board
BD90 board
KEY-RIGHT board
Ver. 1.2
PT board
PT board (EXCEPT US,CND)
PT (U) board (US,CND)