ICF-S79W - Sony Audio Service Manual (repair manual). Page 6

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.

•  C : panel designation.

•  A : B+ Line.
•  C  : adjustment for repair.
•  Power voltage is dc 4.5 V and fed with regulated dc power 

supply from battery terminal.

•  Voltages and waveforms are dc with respect to ground 

under no-signal (detuned) conditions.

  no mark : FM
  (         ) : AM
  ‹‹      ›› : WEATHER
•  Voltages are taken with a VOM (Input impedance 10 

M

Ω).

  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 : 

FM

  f : 

AM

  L  : WEATHER (1 – 5 ch)

Note:
•  X : Parts extracted from the component side.
•  Y : parts extracted from the conductor side.
•   W  : indicates side identifi ed with part number.
•      z : 

Through 

hole.

•      f  : internal component.
• 

 : Pattern from the side which enables seeing.

  (The other layers' patterns are not indicated.)

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.