SA-CRW55, SA-P55H, SA-W55, SS-CN5, SS-F55H, SS-SR5 - Sony Audio Service Manual (repair manual). Page 9

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SA-CRW55/P55H/W55/SS-CN5/F55H/SR5
9
9
SECTION  2
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.
•  2 : Nonfl ammable resistor.
•  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.
•  B : 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
Ω).
  Voltage variations may be noted due to normal production 
tolerances.
• Signal path.
  F : 
AUDIO
• Abbreviation
 AUS : 
Australian 
model
  BR 
: Brazilian model
  CND  : Canadian model
  E51 
: Chilean and Peruvian models
  SP 
: Singapore model
 TH  : 
Thai 
model
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.)
•  Indication of transistor.
 
C E
B
These are omitted. 
 
B
These are omitted.
C E
Q
Note: 
The components identi-
fi
 ed by mark 0 or dotted 
line with mark 0 are criti-
cal for safety. 
Replace only with part 
number specifi ed.
Note: 
Les composants identifi és 
par une marque 0 sont 
critiques pour la sécurité. 
Ne les remplacer que par 
une pièce portant le nu-
méro spécifi é.
•  IC Block Diagram
– MAIN Board (SA-W55) –
IC500  
μPC1237C-A
SWITCH FOR
LATCH/AUTOMATIC
RESET
OUTPUT
OFFSET
DETECTOR
OVERLOAD
DETECTOR
AC-OFF
DETECTOR
FLIP-FLOP
OUTPUT
OFFSET
DETECTOR
OUTPUT
OFFSET
DETECTOR
1
LOADOVER
2
DETECT
 DC
3
RESET
4
OFF AC
6
DRIVER
RELA
Y
5
GND
7
OFF AC
8
VCC
• Abbreviation
 AUS : 
Australian 
model
  BR 
: Brazilian model
  CND  : Canadian model
  E51 
: Chilean and Peruvian models
  SP 
: Singapore model
 TH  : 
Thai 
model
Ver. 1.1
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