XDR-S56DBP - Sony Audio Service Manual (repair manual). Page 7

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XDR-S56DBP
XDR-S56DBP
7
7
SECTION  4
DIAGRAMS
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 
specifi ed.
•  C : Panel designation.
THIS  NOTE  IS  COMMON  FOR  PRINTED  WIRING  BOARDS  AND  SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
•  A : B+ Line.
•  Voltages and waveforms are dc with respect to ground 
under no-signal conditions.
  no mark : AUDIO (DAB/FM)
•  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 
(DAB/FM)
For Printed Wiring Boards.
Note:
•  X : Parts extracted from the component side.
•  Y : Parts extracted from the conductor side.
• 
 : Pattern from the side which enables seeing.
  (The other layers’ patterns are not indicated.)
• Waveforms
– MICRO COMPUTER Board –
•  Circuit Boards Location
1.4 Vp-p
32.768 kHz
  IC501 RT (XT1)
0.5 V/DIV, 20 
μsec/DIV
•  IC Block Diagrams
– MAIN Board –
IC301  TDA2822M
IC953  MM3291CNRE
1
OUTR
VCC
OUTL
GND
NFR
INR
INL
NFL
2
7
8
3
4
5
6
– REG Board –
IC952  MM1563DFBE
1
VOUT
NC
GND
CN
VIN
NC
NC
CONT
REFERENCE
DRIVER
BIAS
CURRENT
LIMITTER
THERMAL
SHUTDOWN
2
3
4
8
7
5
6
VDD 1
GND 2
CE 3
NC
4
REGULATOR
VOUT
5
JACK board 
MICRO COMPUTER board 
MAIN board 
KEY board 
REG board 
MODULE (DAB tuner)
(TU1)
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