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
CD
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)
(Page 45)
DISC TRAY
ADDRESS DETECT
DISC TRAY SLIDE
CLOSE
OPEN
B
(DISC TRAY SLIDE)
DISC IN DETECT
SENSOR DISC TRAY
SENSOR
DISC
TRAY
TURN
DISC TRAY TURN
MOTOR DRIVER
LEVEL SHIFT
C

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)
D
– 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)
E
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)
05
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)
21
21
E
4
12
34
12
3
()

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 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)

HCD-GRX70/GRX70J/RXD80
– 57 – – 58 –
7-21. PRINTED WIRING BOARD – CD SW Board – • See page 28 for Circuit Boards Location.
7-22. SCHEMATIC DIAGRAM – CD SW Board –
(Page 55)
(Page 54)

– 59 –
• Waveforms
– BD Board –
1IC101 ^¶ (XTAO) 5IC101 @§ (MDP)
2IC101 %¡ (RF AC) (CD Play Mode)
3IC101 $¡ (TE) (CD Play Mode)
4IC101 #ª (FE) (CD Play Mode)
6IC102 !§ (RFO) (CD Play Mode) 2IC501 !∞ (XIN)
– MAIN Board –
1IC501 0(XC-IN)
3.1 Vp-p
16.9344 MHz
1.2 Vp-p
0.2 Vp-p
0.5 Vp-p
2.5 Vp-p
7.8 µ s
1.3 Vp-p
1.8 Vp-p
32.768 kHz
2.2 Vp-p
16 MHz
– PANEL Board –
1IC601 &™ (XOUT)
4.7 Vp-p
12.5 MHz

– 63 –
HCD-GRX70/GRX70J/RXD80
7-24. SCHEMATIC DIAGRAM –TRANSFORMER Section –
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : TUNER (FM/AM)
The components identified by mark !or dotted
line with mark !are critical for safety.
Replaceonlywith part number specified.
Lescomposants identifiés parunemarque !sont
critiques pour la sécurité. Ne les remplacer que
par une piéce portant le numéro spécifié.
(Page 48)
(Page 50)
(Page
50)

– 64 –
• IC Block Diagrams
– BD Board –
IC101 CXD2587Q
TE
RFDC
CE
IGEN
AVSS0
ADIO
AVDD0
CLTV
FILO
AVSS3
VSS
AVDD3
DOUT
VDD
PCO
FILI ASYO
ASYI
RFAC
BIAS
SSTP
DFCT
MIRR
MDP
LOCK
FOK
SFDR
VSS
TEST
FRDR
FE
VC
COUT
SE
XTSL
TES1
SRDR
TFDR
FFDR
TRDR
2
1
70
71
68
69
66
67
64
65
62
61
63
73
74
72
75
76
77
78
79
80
4
XRST
3
SQCK
SQSO
59
8
7
6
56
60 53
54
55
59 57
58 51
52 48
49
50 47 44
45
46 43 41
42
XLAT
CLOK
SENS
SYSM
DATA
XUGF
XPCK
GFS
C2PO
WFCK
10 11 12 13 14 15 16 17 18 19 20
21
22
23
24
25
26
32
33
30
31
36
37
34
35
39
40
38
28
27
29
SPOA
ATSK
SCLK
VDD
SCOR
SPOB
XLON
XTAI
XVDD
EMPH
AVDD1
AOUT1
AIN1
XTAO
XVSS
AIN2
AOUT2
AVDD2
RMUT
LOUT2
LOUT1
BCK
LRCK
PCMD
LMUT
AVSS1
AVSS2
CPU
INTERFACE
SERVO AUTO
SEQUENCER
SERIAL IN
INTERFACE
OVER SAMPLING
DIGITAL FILTER
3rd ORDER
NOISE SHAPER
PWM PWM
EFM
DEMODULATOR
TIMING
LOGIC
DIGITAL
OUT
D/A
INTERFACE
DIGITAL
PLL ASYMMETRY
CORRECTION
CLOCK
GENERATOR
MIRR, DFCT,
FOK
DETECTOR
DIGITAL
CLV
SUBCODE
PROCESSOR
SERVO
INTERFACE
SERVO DSP
FOCUS
SERVO
TRACKING
SERVO
SLED
SERVO
PWM GENERATOR
FOCUS PWM
GENERATOR
TRACKING
PWM GENERATOR
SLED PWM
GENERATOR
16K
RAM
ERROR
CORRECTOR
INTERNAL BUS
A/D
CONVERTER
OPERATIONAL
AMPLIFIER
ANALOG SWITCH

– 65 –
IC103 CXA2568M-T6
APC PD AMP
APC LD AMP
RF SUMMING AMP RF EQ AMP
FOCUS ERROR AMP
TRACKING
ERROR AMP
VC BUFFER
VCC
50µA
VEE
VEE
VC
VC
VC
VC
VC
VC VC VC
VC
VC
VCC
VEE
VCC
VEE
VEE
VC
VCC
LC/PD
LD ON
HOLD SW
AGC CONT
RFTC
RF I
RF O
RFE
TE
FE
RF BOT
HOLD
AGC VTH
LD
PD
A
B
C
D
VEE
F
E
VC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
+
–
+
–
+
–
+
–
+
–
+
–
+
–
VCC
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
– MOTOR (TURN) Board –
IC701 M54641L
REG
CONTROL
INPUT
AMP.
INPUT
AMP.
1
2
3
45
6
7
8
POWER AMP.
POWER AMP.
VCC
OUT1
IN2
REFERENCE
GND
IN1
OUT2
VCC
– MOTOR (SLIDE) Board –
IC801 BA6286N
POWER
SAVE
CONTROL
LOGIC
TSD
1
2
3
4
5
6
7
8
9
10
GND
RIN
VREF
OUT2
RNF
GND
OUT1
VM
VCC
FIN

– 66 –
– AUDIO Board –
IC602 µPC1330HA
1234567 8 9
INVERTER
COMPARATER
SW R1 GND SW P1 CONT GND VCC SW P2 GND SW R2
– PANEL Board –
IC603 BA3830F
F01
R02
R01
LINE NF
LINE IN
REFERENCE
CURRENT
REFERENCE
CURRENT
RESET
BAND
PASS
FILTER DET
17
RESET
18
F02
16 F03
15 F04
14 F05
13 F06
12
REC LEVEL
11
VCC
10
4
3
2
1
+
–
REC NF
REC IN 6
RESET C 7
BIAS C 8
GND 9
5
+
–
IC604 NJU3716M-T2
OUTPUT CIRCUIT
LATCH CIRCUIT
SHIFT REGISTER
CONTROL
CIRCUIT
2021 192324 22 18 17 16 15 14 13
43
21 6
P7 P8 P9
P10 P11
VSS
P12 P13 P14 P15 P16
7
SO
8910 11 125
VDD P6 P5 P4 P3 P2 VSS P1 CLR STB CLK DATA
IC711 M65850FP (HCD-GRX70J: Saudi Arabia)
OSCILLATOR
1/2 VCC
AUTO
RESET
LPF1
MAIN
CONTROL
A/D
20KBIT
SRAM
LPF2
D/A
12 3 45 6 7
891014 13 12 11
CLOCK
RESET MO
MI
D1 DO0
DO1
VCC CLOCK REF OP2IN OP2OUT LPF2IN LPF2OUT
LPF1IN
LPF1OUT
OP1OUT
OP1IN
CC1 CC2
GND