HCD-GPX33, HCD-GPX55, HCD-GPX77, HCD-GPX88 - Sony Audio Service Manual (repair manual). Page 27

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•  Circuit Boards Location
THIS  NOTE  IS  COMMON  FOR  PRINTED  WIRING  BOARDS  AND  SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
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.
•      f  : Internal component.
•  2 : Nonfl ammable resistor.
•  5 : Fusible resistor.
•  C : Panel designation.
•  A : B+ Line.
•  B : B– Line.
•  Voltages and waveforms are dc with respect to ground 
under no-signal (detuned) conditions.
  no mark : TUNER (FM) 
 
       
*
      : Impossible to measure 
 
•  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
  f : 
TUNER 
(FM/AM)
  N : 
MIC
  J 
: CD PLAY
  E : 
USB
• Abbreviation
 AR  : 
Argentina 
model
 AUS : 
Australian 
model
  E2 
: 120 V AC area in E model
 E4  : 
African 
model
  E51 
: Chilean and Peruvian models
  EA 
: Saudi Arabia model
  MX 
: Mexican model
For Printed Wiring Boards.
Note:
•  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.)
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.
Caution:
Pattern face side:
(Conductor Side)
Parts face side: 
(Component Side)
Parts on the pattern face side seen 
from the pattern face are indicated.
Parts on the parts face side seen from 
the parts face are indicated.
• Abbreviation
 AR  : 
Argentina 
model
 AUS : 
Australian 
model
  E2 
: 120 V AC area in E model
 E4  : 
African 
model
  E51 
: Chilean and Peruvian models
  EA 
: Saudi Arabia model
  MX 
: Mexican model
BLUETOOTH module
DISPLAY board
STR board
VOLUME board
BASS BAZUCA board
RC-S801/A (WW) board
REGULATOR, SWITCHING
MB board
MIC board
(GPX88)
Ver. 1.1
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