CDX-GT320, CDX-GT32W, CDX-GT370, CDX-GT370S (serv.man2) - Sony Car Audio Service Manual (repair manual). Page 3

3

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

specified.

•

f

: internal component.

•

C

: panel designation.

• X

: parts extracted from the component side.

• Y

: parts extracted from the conductor side.

•

a

: Through hole.

•

: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

•

A

: B+ Line.

•

B

: B– Line.

•

H

: adjustment for repair.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

   no mark : FM

(

) : AM/MW/SW

<

> : CD PLAY

∗

: Impossible to measure

• 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.

J

: CD PLAY

F

: FM

f

: AM/MW/SW

L

: BUS

g

: AUX

Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)

pattern face are indicated.

Parts face side: Parts on the parts face side seen from the
(Side A)

parts face are indicated.

Q

C

These are omitted

E

B

E

These are omitted

C

B

C

These are omitted

B

E

Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size.)

Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40°C higher than

ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

Note:
The components identi-
fied by mark 

0

 or dotted

line with mark 

0

 are criti-

cal for safety.
Replace only with part
number specified.

Note:
Les composants identifiés par
une marque 

0

 sont critiques

pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.