HCD-XGR80 - Sony Audio Service Manual (repair manual). Page 21

21

21

Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted.  pF: µµF

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.

•

5

: fusible resistor.

•

C

: panel designation.

• X

: parts extracted from the component side.

•

: Pattern from the side which enables seeing.

(The other layers´ Patterns are not indicated.)

• Indication of transistor.

•

A

: B+ Line.

•

B

: B– Line.

•

H

: adjustment for repair.

• Voltages and waveforms are dc with respect to ground

under no-signal conditions.
BD board section
   no mark: CD PLAY
Other board section
   no mark: TUNER (FM/AM)
   (           ): TAPE PLAY
   <         >: TAPE REC
   [           ]: CD PLAY

• Voltages are taken with a VOM (Input impedance 10 M

Ω

).

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

: TUNER (FM/AM)

E

: TAPE PALY (DECK A)

d

: TAPE PALY (DECK B)

G

: RECORD

J

: CD PALY (ANALOG OUT)

c

: CD PALY (DIGITAL OUT)

N

: MIC INPUT

• Abbreviation

AR

: Argentina model

MX

: Mexican model

E51

: Chilean and Peruvian model

Note:
The components identified by mark 

0

 or dotted line

with mark 

0

 are critical for safety.

Replace only with part number specified.

PANEL FL board

TRANS board

SUB TRANS board

MAIN board

PA board

SUB AMP board

TC-B board

HEADPHONE board

FRONT INPUT board

CD-R board

CD-L board

MIC/GUITAR board

TC-A board

PANEL VR board

TUNER PACK
 (FM/AM TUNER UNIT)

SENSOR board

D-SW board

MOTOR board

LED board

BD board

B

These are omitted.

C

E

Q

B

These are omitted.

C

E

Q

C

B

These are omitted.

E

Q