Sony HCD-RG490 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.
•
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.
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.
HCD-RG490/RG590
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/BD Boards –
no mark :CD PLAY
– CD-G Board –
no mark : CD-G PLAY
– Other Boards –
no mark : TUNER (FM/AM)
( ) : CD PLAY
〈〈 〉〉 : TAPE PLAY
{ } : REC
∗
: 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
E
: TAPE PLAY (DECK-A)
d
: TAPE PLAY (DECK-B)
G
: REC
N
: MIC
f
: AUDIO IN
L : VIDEO
• Abbreviation
AR : Argentina model
AUS : Australian model
E2 : 120 V AC area in E model
E3 : 240 V AC area in E model
E51 : Chilean and Peruvian models
EA : Saudi Arabia model
MX : Mexican model
RU : Russian model
• Circuit Boards Location
MOTOR (LD) board
KEY TOP board
(RG590: E2, E3, E51, EA, MX, AR models)
KEY LEFT board
PANEL board
MIC. AUX. HP board
TRANSFORMER board
27 27
HCD-RG490/RG590
CD-G board
(MX model)
BD board (MX model)/
CD board (EXCEPT MX model)
SW board
KEY RIGHT board
VIDEO-OUT board
(MX model)
SUB WOOFER board
SW-SP board
MAIN board
POWER board
DECK board
• Abbreviation
AR : Argentina model
E2 : 120 V AC area in E model
E3 : 240 V AC area in E model
E51 : Chilean and Peruvian models
EA : Saudi Arabia model
MX : Mexican model
Ver. 1.1
SENSOR board
DRIVER board
TUNER (FM/AM)
MOTOR (TB) board