Sony HCD-GT22 Service Manual page 27

• 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.
•
W : indicates side identified with part number.
•
f : internal component.
•
: 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.
• Indication of transistor
C
Q
These are omitted.
B E
Q
B C E
These are omitted.
HCD-GT22/GT44/GT55
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.
• All resistors are in Ω and
1 / W or less unless otherwise
4
specified.
•
f : internal component.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– CD Board –
no mark : CD PLAY
[ ] : USB
– USB Board –
no mark : USB
– TC Board –
no mark : TAPE PLAY
( ) : TAPE REC
〈〈 〉〉 : TAPE A
{ } : TAPE B
– Other Board –
no mark : TUNER (FM/AM)
( ) : CD PLAY
[ ] : TAPE PLAY
∗
: Impossible to measure
• 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
: TUNER (FM/AM)
J
: CD PLAY
: USB
E
: TAPE PLAY (DECK-A)
d : TAPE PLAY (DECK-B)
G : TAPE REC
f : AUDIO IN
N : MIC
• Abbreviation
AR : Argentina model
AUS : Australian model
E2 : 120V AC Area in E model
E3 : 240V AC Area in E model
E13 : 220V – 230V AC Area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
• Circuit Boards Location
MOTOR (LD) board
KEY TOP board
(GT55)
KEY LEFT board
PANEL board
VOLUME board
MIC board
D-LIGHT SYNC board (except Australian model)
TRANS board
TC board
27 27
HCD-GT22/GT44/GT55
SW board
CD board
SENSOR board
DRIVER board
TUNER (FM/AM)
MOTOR (TB) board
USB board
KEY RIGHT board
SUB WOOFER board (GT44/GT55)
5V REG board
SW-SP board
(GT44/GT55)
MAIN board
AMP board