Sony HCD-GRX70,HCD-GRX80,HCD-GRX70J Service Manual
HCD-GRX70/GRX70J/RXD80
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SERVICE MANUAL
TEL 13942296513 QQ 376315150 892498299
HCD-GRX70/GRX70J/RXD80 are the Amplifier, CD player, Tape Deck and Tuner
section in HMC-GRX70/GRX70J/RXD80.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.
Photo: HCD-GRX70 (GRAY)
Model Name Using Similar Mechanism HCD-GRX50/RXD7
CD
Section
Tape deck
Section
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 T ype TCM-230AWR2
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Canadian Model
Australian Model
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HCD-GRX70/GRX70J
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HCD-RXD80
E Model
HCD-GRX70
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TEL 13942296513 QQ 376315150 892498299
TEL
13942296513
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)
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SPECIFICATIONS
Inputs
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
(phono jacks) impedance 47 kilohms
MIX MIC: (phone jack) sensitivity 1 mV, impedance 10
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):
SUPER WOOFER: Voltage 1 V, impedance 1 kilohm
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kilohms
accepts impedance of 16 ohms
– Continued on next page –
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MINI Hi-Fi COMPONENT SYSTEM
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7-7. SCHEMATIC DIAGRAM – BD Board – • See page 59 for Waveforms. • See page 64 for IC Block Diagrams.
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• Voltages and waveforms are dc with respect to ground
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under no-signal conditions.
no mark : CD STOP
( ) : CD PLAY
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The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part number specified.
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– 32 –
Les composants identifiés par une marque ! sont
critiques pour la sécurité. Ne les remplacer que
par une piéce portant le numéro spécifié.
7-9. SCHEMATIC DIAGRAM – CD MOTOR Section – • See page 65 for IC Block Diagrams.
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DISC TRAY
ADDRESS DETECT
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HCD-GRX70/GRX70J/RXD80
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DISC TRAY SLIDE
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DISC
TRAY
TURN
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DISC IN DETECT
SENSOR
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DISC TRAY
SENSOR
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(DISC TRAY SLIDE)
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CLOSE
OPEN
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(Page 45)
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DISC TRAY TURN
MOTOR DRIVER
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LEVEL SHIFT
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no mark : CD STOP
– 36 –
7-11. SCHEMATIC DIAGRAM – AUDIO Board – • See page 66 for IC Block Diagram.
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HCD-GRX70/GRX70J/RXD80
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PB EQ AMP
(DECK A)
PB EQ AMP
(DECK B)
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(PLAYBACK)
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PB LEVEL (L)
(DECK A)
PB LEVEL (R)
(DECK A)
PB LEVEL (L)
(DECK B)
PB LEVEL (R)
(DECK B)
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(Page 49)
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REC BIAS (R)
(DECK B)
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BIAS OSC
REC BIAS (L)
(DECK B)
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SWITCHING
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REC BIAS
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• Voltages are dc with respect to ground under no-signal
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no mark : TAPE PLAY
( ) : RECORD
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The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part number specified.
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Les composants identifiés par une marque ! sont
critiques pour la sécurité. Ne les remplacer que
par une piéce portant le numéro spécifié.
– 39 –
– 40 –
HCD-GRX70/GRX70J/RXD80
7-12. PRINTED WIRING BOARD – LEAF SW Board – • See page 28 for Circuit Boards Location.
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(DECK A HALF)
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(DECK A PLAY)
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DECK A
PLUNGER
(DECK A 120/70)
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7-13. SCHEMATIC DIAGRAM – LEAF SW Board –
(CAPSTAN)
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DECK B
PLUNGER
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DECK A
PLUNGER
(DECK A 120/70)
(DECK A HALF)
(DECK A REC)
(DECK B HALF)
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ROTATION DETECT SENSOR
(DECK A)
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(DECK A REC)
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• Semiconductor Location
(DECK B 120/70)
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DECK B
PLUNGER
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(DECK B REC)
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(Page 49)
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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
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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
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Ref. No. LocationRef. No. Location
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
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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
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CONTROL SWITCH
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(Page 43)
ROTATION DETECT
SENSOR (DECK B)
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(DECK B REC)
(DECK B 120/70)
• Voltages are dc with respect to ground under no-signal
conditions.
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( ) : RECORD
: Impossible to measure
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(DECK A PLAY)
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