Sony HCD-GX470 / HCD-GX570 / MHC-GX470 / MHC-GX570XM Service Manual ▷ View online
21
HCD-GX470/GX570
3. Mode: Playback
set
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
oscilloscope
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
MIC. AUX. HP board
PHONES jack
(J701)
PHONES jack
(J701)
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
so that outputs match within 1dB of peak.
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
Output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
Screw
position
position
R-CH
peak
peak
SECTION 6
ELECTRICAL ADJUSTMENTS
0 dB=0.775 V
DECK SECTION
set
MIC. AUX. HP board
PHONES jack
(J701)
PHONES jack
(J701)
+
–
–
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
3. After the adjustments, apply suitable locking compound to the
parts adjust.
TEST TAPE
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Note 1:
Remove the mecha deck before this adjustment.
(Refer to Section 3. DISASSEMBLY (See page 9))
(Refer to Section 3. DISASSEMBLY (See page 9))
Note 2:
Perform this adjustment for both decks.
Procedure:
1. Mode: Playback
Tape
Signal
Used for
P-4-A063
6.3 kHz, -10 dB
Azimuth Adjustment
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Playback Head (DECK-A)
Record/Playback/Erase Head (DECK-A)
22
HCD-GX470/GX570
CD SECTION
Note:
1.
CD Block is basically constructed to operate without adjustment.
2.
Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10 M
Ω
impedance.
4.
Clean the object lens by an applicator with neutral detergent when
the signal level is low than specified value with the following checks.
5.
Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
Procedure :
1. Connect oscilloscope to TP (RFACI) and TP (VC) on the CD
board.
2. Press the
I
/1
button to turn the power on, and press
the
A
button to open the CD disc table.
3. Set disc (YEDS-18) on the tray and press the 7 button to
playback.
4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
Connecting Location:
+
–
–
CD board
TP (RFACI)
TP (VC)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
0.9
0.9
±
0.4 Vp-p
TP
(VC)
TP
(RFACI)
IC201
– CD Board (Conductor Side) –
HCD-GX470/GX570
23
23
HCD-GX470/GX570
SECTION 7
DIAGRAMS
7-1. BLOCK DIAGRAM – CD SERVO Section –
CD DSP
IC201
CH2RIN
MUTE
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
57
64
A
+3.3V
DETECTOR
A
AC_
SUM
58 B
65
EG_
IN
IN
70
RFACO
71 RFACI
3
PCMD
112
AOUT1
117
AOUT2
4 PCMDI
5
BCK
55
FEO
53
TEO
52
TEI
54
FEI
6 BCKI
R-CH
1
LRCK
2 LRCKI
59 C
60 D
50 E
51 F
66 LD
67 PD
16 CH4OUTF
15 CH4OUTR
27 OPOUT
38 MDP
AUTOMATIC
POWER CONTROL
Q321
LD
PD
LASER DIODE
OPTICAL PICK-UP BLOCK
(KSM-213DCP)
B
C
D
E
F
41 SFDR
42 SRDR
43 TFDR
44 TRDR
45 FFDR
46 FRDR
DATA
C-3
C-4
C-5
C-15
C-6
C-7
C-11
C-12
C-9
C-10
C-14
C-13
C-1
C-8
C-3
C-5
C-15
C-6
C-4
C-7
C-11
C-12
C-9
C-10
C-14
C-13
C-1
C-8
I-V AMP
M401
(SPINDLE)
M402
(SLED)
17 CH3OUTF
18 CH3OUTR
14 CH1OUTF
13 CH1OUTR
12 CH2OUTF
11
7
20
89
SSTP
39
CH2FIN 6
CH1RIN 5
CH1FIN 4
CH3RIN 22
CH3FIN 23
CH4IN 24
OPIN+ 2
CH2OUTR
M
M
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC402
S201
(LIMIT)
+3.3V
108
XTAO
109
XTAI
X201
16.9344MHz
CLOK
11
XLAT
16
SENS
20
SCOR
26
DATA2
12
CLK2
90
XLAT-MP3
13
REQ-MP3
14
IREQ-MP3
10
ACK-MP3
15
XTACN
7
XRST
8
52 O-CD-DATA
54 O-CD-CLK
28 O-XLAT/O-MP3-STB
53 I-CD-SENS
40 I-SCOR
71 I-MP3-DATA
72 O-MP3-DATA
70 O-MP3-CLK
26 O-MP3-XLAT/O-MP3-CS
30 O-MP3-CS/O-MP3-LP
29 I-MP3-REQ
27 I-MP3-ACK
24 O-XTCN
32 O-XRST
31 O-D-MUTE/O-XLT
LOADING MOTOR DRIVE
IC701
FIN
RIN
O-LM-F
S751
LEVEL SHIFT
Q731
DISC TABLE
ADDRESS SENSOR
IC731
34
OUT1 4
OUT2 2
7
9
O-LM-R 33
M
M751
(LOADING)
TABLE MOTOR DRIVE
IC712
FIN
RIN
O-TM-F 36
OUT1 4
OUT2 2
7
9
O-TM-R 35
I-CD-NUMBER-SENS 37
I-CD-ENCODER 66
I-OPEN-SW 38
M
M741
(TABLE)
ROTARY
ENCODER
S711
DISC TABLE
ADDRESS DETECT
OPEN
CLOSE
DISC TABLE
OPEN/CLOSE
DETECT
A
CD-L
SYSTEM CONTROLLER
IC901 (1/4)
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
(Page 24)
HCD-GX470/GX570
24
24
HCD-GX470/GX570
7-2. BLOCK DIAGRAM – MAIN Section –
AUDIO IN
R-CH
J702
HP IN
C
CD-L
A
L451
BIAS OSC
MUTING
Q305
HRPE1
(REC/PB/ERASE)
(DECK-B)
HP1
(PB)
(DECK-A)
L-CH
R-CH
R-CH
L-CH
R-CH
R-CH
R-CH
MUTING
Q307
MUTING CONTROL
SWITCH
Q305, 306
MUTING
Q401
R-CH
MUTING
CONTROL SWITCH
Q400, 407
REC CONTROL
SWITCH
Q409, 410
R-CH
REC AMP
IC401
PB AMP
IC301
ERASE
BIAS OSC
Q453
REC SWITCH
Q403
PB SWITCH
(DECK-B)
Q303
REC BIAS
SWITCH
Q451, 452
+9V
R-CH
R-CH
PB SWITCH
(DECK-A)
Q301
R-CH
+
DECK-A/B
SELECT SWITCH,
REC/PB
SELECT SWITCH
Q405, 406, 408
TUNER (FM/AM)
AM
FM ANT
AM ANT
TUNER-L
TUNER-R
PLL DO
R-CH
PLL DI
PLL CLK
PLL CE
FM75
Ω
COAXIAL
ANTENNA
45 I-LC23003-DI
39 TAPEL
1 TUNERL
16
DATA
15
CLK
2
10
AUXL
11 VINL
TONEOUTL
14
OUTL
40 CDL
O-BIAS
43 O-LC23003-DO
44 O-LC23003-CLK
42 O-LC23003-CE
4
O-REC/PB
2
O-REC-MUTE
3
O-R2S15207FP-
DATA
58
4
SAOUT
I-VACS
63
O-AUDIO-CLK
57
I-HP/AUDIO IN
61
12
BB12
13
BB22
F
SW OUT
E
OUT
G
BASS AGC
3
RECOUTL
I-HALF-A
D921
BAND-PASS
FILTER
Q111, 112
+
R-CH
R-CH
BASS AGC
Q113
D031
INPUT SELECTOR, TONE CONTROL,
ELECTRICAL VOLUME
IC101
CAMP+
M
TAPE MECHANISM
DECK BLOCK
A-HALF
B-SOL
B-HALF
A-PHOTO
B-PHOTO
B-REC-F
CAPSTAN/REEL
MOTOR DRIVE
Q701, 704
TRIGGER PLUNGER
DRIVE (DECK-B)
Q702, 705
30
O-SOL-B 35
A-SOL
TRIGGER PLUNGER
DRIVE (DECK-A)
Q703, 706
O-SOL-A 34
O-MOTOR 33
I-HALF-B 27
I-RELL-A 31
I-RELL-B 28
I-REC-SW
O-TCM-SYNC
29
I-TCM-SYNC 73
36
TAPE MECHANISM
DECK CONTROLLER
IC701 (1/2)
SYSTEM CONTROLLER
IC901 (2/4)
: TUER (FM/AM)
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: TAPE PLAY (DECK-A)
: TAPE PLAY (DECK-B)
: REC
: XM
: AUDIO IN
5
SC_RX_IN
3
SC_TX_OUT
O-XM-TXD
51
I-XM-RXD
50
7
CDM_SEL
9
ERR_IRQ#
O-XM-DTIC-CMD
49
I-XM-IRQ
41
11
RST#
O-XM-DTIC-RESET
46
O-XM-POWER
47
O-XM-POWER3.3
8
19
18
COMM_RX_N
COMM_RX_P
LINE AMP
IC051
XM RECEIVER
IC001
D/A CONVERTER
IC041
J001
(XM)
3
2
1
D+
D–
VCC
22
23
COMM_TX_N
COMM_TX_P
5
PDN
2
3
BICK
SDTI
1
4
MCLK
LRCK
39
37
I2S_CLK
I2S_DA
11
AOUTL
10
AOUTR
R-CH
43
41
I2S_OCLK
I2S_LRCLK
B+ SWITCH
Q304, 305
O-XM-MUTE
TXD
RXD
CMD
IRQ
RESET
POWER
POWER3.3
MUTE
TXD
RXD
CMD
IRQ
RESET
POWER
POWER3.3
MUTE
48
XM
+3.3V
+3.3V
B+ SWITCH
Q001, 003
XM
+5.2V
+5.2V
(GX570)
MUTING
CONTROL
Q303
MUTING
Q301
(GX570)
(Page 25)
(Page 25)
(Page 25)
(Page 23)
(Page 25)
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