Sony HCD-GRX70 User manual

MICROFILM

SERVICE MANUAL

MINI Hi-Fi COMPONENT SYSTEM

HCD-GRX70/GRX70J/RXD80

Dolby noise reduction manufactured under license

from Dolby Laboratories Licensing Corporation.

“DOLBY” and the double-D symbol aare trade-

marks of Dolby Laboratories Licensing Corporation.

Canadian Model

HCD-RXD80

E Model

HCD-GRX70/GRX70J

Australian Model

HCD-GRX70

HCD-GRX70/GRX70J/RXD80 are the Am-

plifier, CD player, Tape Deck and Tuner

section in HMC-GRX70/GRX70J/RXD80.

SPECIFICATIONS

Amplifier section

Canadian model:

Continuous RMS power output (reference)

100 + 100 watts

(8 ohms at 1 kHz, 10% THD)

Total harmonic distortion less than 0.07%

(8 ohms at 1 kHz, 55 W)

Other models:

The following measured at AC 120, 220, 240 V 50/60 Hz

DIN power output (rated) 130 + 130 watts

(6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference)

170 + 170 watts

(6 ohms at 1 kHz, 10% THD)

Model Name Using Similar Mechanism HCD-GRX50/RXD7

CD Mechanism Type CDM38LH-5BD32L

Base Unit Name BU-5BD32L

Optical Pick-up Name KSS-213D/Q-NP

Model Name Using Similar Mechanism HCD-GRX50/RXD7

Tape Transport Mechanism Type TCM-230AWR2

Section

Tape deck

Section

Photo: HCD-GRX70 (GRAY)

Inputs

MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,

(phono jacks) impedance 47 kilohms

MIX MIC: (phone jack) sensitivity 1 mV, impedance 10

kilohms

Outputs

MD OUT: voltage 250 mV,

(phono jacks) impedance 1 kilohms

PHONES: accepts headphones of 8 ohms

(stereo mini jack) or more

SPEAKER:

Canadian model: accepts impedance of 8 to 16 ohms

SURROUND SPEAKER (GRX70/GRX70J):

accepts impedance of 16 ohms

SUPER WOOFER: Voltage 1 V, impedance 1 kilohm

– Continued on next page –

HCD-GRX70/GRX70J/RXD80

– 31 – – 32 –

7-7. SCHEMATIC DIAGRAM – BD Board – • See page 59 for Waveforms. •See page 64 for IC Block Diagrams.

• Voltages and waveforms are dc with respect to ground

under no-signal conditions.

no mark : CD STOP

( ) : CD PLAY

The components identified by mark !or dotted

line with mark !are critical for safety.

Replaceonlywithpartnumber specified.

Lescomposants identifiéspar une marque !sont

critiques pour la sécurité. Ne les remplacer que

par une piéce portant le numéro spécifié.

(Page 45)

HCD-GRX70/GRX70J/RXD80

– 35 – – 36 –

7-9. SCHEMATIC DIAGRAM – CD MOTOR Section – • See page 65 for IC Block Diagrams.

• Voltages are dc with respect to ground under no-signal

conditions.

no mark : CD STOP

(Page 45)

DISC TRAY

ADDRESS DETECT

DISC TRAY SLIDE

OPEN

(DISC TRAY SLIDE)

DISC IN DETECT

SENSOR DISC TRAY

SENSOR

DISC

TRAY

TURN

DISC TRAY TURN

MOTOR DRIVER

LEVEL SHIFT

HCD-GRX70/GRX70J/RXD80

PB LEVEL (L)

(DECK A)

PB LEVEL (R)

(DECK A)

PB LEVEL (L)

(DECK B)

PB LEVEL (R)

(DECK B)

PB EQ AMP

(DECK A)

PB EQ AMP

(DECK B)

SWITCHING

REC BIAS (L)

(DECK B)

REC BIAS (R)

(DECK B)

BIAS OSC

REC BIAS

-6.8

(PLAYBACK)

– 39 – – 40 –

7-11. SCHEMATIC DIAGRAM – AUDIO Board – • See page 66 for IC Block Diagram.

• Voltages are dc with respect to ground under no-signal

conditions.

no mark : TAPE PLAY

( ) : RECORD

The components identified by mark !or dotted

line with mark !are critical for safety.

Replaceonly with partnumber specified.

Lescomposants identifiéspar une marque !sont

critiques pour la sécurité. Ne les remplacer que

par une piéce portant le numéro spécifié.

(Page 49)

HCD-GRX70/GRX70J/RXD80

DECK B

PLUNGER DECK A

PLUNGER

(CAPSTAN)

(DECK A 120/70)

(DECK A HALF)

(DECK A REC)

(DECK B HALF)

(DECK B REC)

(DECK B 120/70)

ROTATION DETECT SENSOR

(DECK A)

ROTATION DETECT

SENSOR (DECK B)

(DECK A PLAY) (DECK B PLAY)

CONTROL SWITCH

– 41 – – 42 –

7-12. PRINTED WIRING BOARD – LEAF SW Board – • See page 28 for Circuit Boards Location.

7-13. SCHEMATIC DIAGRAM – LEAF SW Board –

• Voltages are dc with respect to ground under no-signal

conditions.

no mark :TAPE PLAY

( ) : RECORD

∗: Impossible to measure

Q113 E-9

Q161 C-9

Q162 C-9

Q163 E-9

Q191 E-12

Q192 E-10

Q201 D-9

Q251 C-9

Q331 C-1

Q332 C-2

Q333 C-2

Q334 C-2

Q335 D-1

Q336 F-1

Q337 F-1

Q338 F-1

Q339 F-1

Q340 E-1

Q341 E-1

Q342 F-1

Q343 E-1

Q401 F-12

Q402 E-12

Q411 G-2

Q412 G-3

Q431 G-12

Q432 G-11

Q433 F-11

Q434 F-11

Q435 F-11

Q436 F-11

Q437 G-12

Q439 F-12

Q471 F-2

Q501 D-7

Q508 D-7

Q509 E-7

Q801 H-10

Q803 G-10

Q804 G-9

Q831 G-10

Q832 G-10

Q851 J-10

Q881 I-9

Q901 H-2

Q902 I-1

Q903 H-1

Q904 G-4

Q905 G-4

Q907 G-5

Q908 G-4

Q909 I-4

Q913 H-1

Q914 G-2

Q923 H-1

Q951 G-2

Q952 H-1

Ref. No. LocationRef. No. Location

D141 E-10

D191 E-12

D331 E-1

D333 F-1

D334 E-1

D335 F-1

D401 G-11

D403 F-12

D405 H-6

D406 J-4

D407 I-2

D411 G-3

D501 D-7

D502 E-6

D503 D-6

D504 D-7

D505 D-7

D506 D-7

D509 F-2

D607 E-5

D644 C-8

D801 J-11

D802 G-9

D803 G-11

D831 I-6

D832 J-7

D851 J-10

D852 G-9

D881 H-9

D901 J-4

D902 J-4

D903 J-4

D904 I-4

D905 I-1

D906 H-1

D907 J-5

D908 I-5

D909 J-5

D910 J-5

D915 I-4

D921 H-4

D922 G-4

D923 G-4

D924 F-2

D925 G-4

IC101 C-10

IC301 B-3

IC381 A-12

IC501 D-5

IC502 D-7

IC801 H-10

IC901 G-6

IC902 G-4

IC903 H-4

Q111 D-10

Q112 D-10

• Semiconductor Location

(Page 49)

(Page 43)

DECK A

PLUNGER

DECK B

PLUNGER

(DECK A PLAY)

(DECK A HALF) (DECK A 120/70) (DECK A REC)

(DECK B HALF)

(DECK B PLAY)

(DECK B 120/70)

(DECK B REC)

()

HCD-GRX70/GRX70J/RXD80

– 45 – – 46 –

7-15. SCHEMATIC DIAGRAM – MAIN Board (1/4) –

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : TUNER (FM/AM)

( ) : CD PLAY

(Page 31)

(Page 36)

(Page 50)

(Page 51)

(Page 47)

HCD-GRX70/GRX70J/RXD80

– 47 – – 48 –

7-16. SCHEMATIC DIAGRAM – MAIN Board (2/4) –

• Voltages are dc with respect to ground under no-signal

(detuned) conditions.

no mark : FM

The components identified by mark !or dotted

line with mark !are critical for safety.

Replaceonly with partnumber specified.

Lescomposants identifiéspar une marque !sont

critiques pour la sécurité. Ne les remplacer que

par une piéce portant le numéro spécifié.

(Page

46)

(Page 50)

(Page 52)

(Page 63)

HCD-GRX70/GRX70J/RXD80

– 49 – – 50 –

7-17. SCHEMATIC DIAGRAM – MAIN Board (3/4) –

• Voltages are dc with respect to ground under no-signal

(detuned) conditions.

no mark : TUNER (FM/AM)

( ) : CD PLAY

{} :TAPE PLAYBACK (DECK A)

[ ] :TAPE PLAYBACK (DECK B)

〈〈 〉〉 : RECORD

(Page 40)

(Page 42)

(Page 46)

(Page 47)

(Page 51)

(Page 63)

(Page 56)

(Page 51)

HCD-GRX70/GRX70J/RXD80

– 51 – – 52 –

7-18. SCHEMATIC DIAGRAM – MAIN Board (4/4) – • See page 59 forWaveforms.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : TUNER (FM/AM)

( ) : CD PLAY

{} :TAPE PLAYBACK (DECK A)

[ ] :TAPE PLAYBACK (DECK B)

〈〈 〉〉 : RECOARD

uPC7812AHF

(Page

46)

(Page

50)

(Page

50)

(Page 48)

HCD-GRX70/GRX70J/RXD80

– 55 – – 56 –

7-20. SCHEMATIC DIAGRAM – PANEL Board– • See page 59 for Waveform. •See page 66 for IC Block Diagrams.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : TUNER (FM/AM)

(Page

58)

(Page 50)

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