HCD-ZX6, HCD-ZX8 - Sony Audio Service Manual (repair manual). Page 2

2

Note on Schematic Diagram:
• 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.

• 2 : nonflammable resistor.
• C : panel designation.

Note on Printed Wiring Board:
• X : Parts extracted from the component side.
• Y : Parts extracted from the conductor side.
•

: Pattern from the side which enables seeing.

(The other layer’s patterns are not indicated.)

• Indication of transistor

Caution:
Pattern face side:

Parts on the pattern face side seen from

(Conductor Side)

the pattern face are indicated.

Parts face side:

Parts on the parts face side seen from

(Component Side) the parts face are indicated.

UNLEADED SOLDER
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.

• A : B+ Line.
• B : B– Line.
• Voltage and waveforms are dc with respect to ground

under no-signal (detuned) conditions.
no mark : FM

• Voltages are taken with a VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal produc-
tion tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-
tion tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F

: AUDIO

• (

 ) : Refer to page of supplement-2.

• <

> : Refer to page of service manual.

Note: The components identified by mark 0 or dotted line

with mark 0 are critical for safety.
Replace only with part number specified.

C

B

These are omitted.

E

Q

B

These are omitted.

C

E

Q

B

These are omitted.

C

E

Q

• (

 ) : Refer to page of supplement-2.

• <

> : Refer to page of service manual.