Sony HT-RT4 Service Manual page 24

HT-RT4/RT40
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
• 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
(Conductor Side) from the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• MAIN board (RT4) or EG4 MAIN board (RT40) is multi-
layer printed board. However, the patterns of intermediate
layers have not been included in diagrams.
• Indication of transistor.
C
Q
These are omitted.
B E
• Abbreviation
AR : Argentina model
AUS : Australian model
E3 : 240 V AC area in E model
E12 : 220-240 V AC area in E model
EA : Saudi Arabia model
LA9 : Latin-American model
SP : Singapore model
When the complete MAIN board (RT4) or
Note 1:
EG4 MAIN board (RT40) is replaced, refer to
"NOTE OF REPLACING THE IC1000 AND
IC1002 ON THE MAIN BOARD (RT4) OR
EG4 MAIN BOARD (RT40) AND THE COM-
PLETE MAIN BOARD (RT4) OR COMPLETE
EG4 MAIN BOARD (RT40)" on page 5.
When the complete MAIN board (RT4) or EG4
Note 2:
MAIN board (RT40) is replaced, spread the
bond referring to"BOND FIXATION OF ELEC-
TRIC PARTS" on page 6.
HT-RT4/RT40
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF)
50 V or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
• : Internal component.
f
• 2 : Nonfl ammable resistor.
• 5 : Fusible resistor.
• C : Panel designation.
Note: The components identifi ed by mark 0 or
dotted line with mark 0 are critical for safety.
Replace only with part number specifi ed.
• A : B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : POWER ON
• Voltages are taken with VOM (Input impedance 10 M).
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.
• Circled numbers refer to waveforms.
• Signal path.
F : AUDIO (DIGITAL)
: AUDIO (ANALOG)
J
E : VIDEO
L : USB
: Bluetooth
a
• Abbreviation
AR : Argentina model
AUS : Australian model
E3 : 240 V AC area in E model
E12 : 220-240 V AC area in E model
EA : Saudi Arabia model
LA9 : Latin-American model
SP : Singapore model
• Circuit Boards Location
REGULATOR, SWITCHING 3L405W-4 (Except E12) /
REGULATOR, SWITCHING 3L405W-5 (E12)
RC-S730 (WW)
TOUCH board
EG4 OLED
CHUKEI PC board
USB board
24 24
BLUETOOTH module
SPEAKER CHUKEI PC BOAR board
MAIN board (RT4) /
EG4 MAIN board (RT40)
CONNECTOR board