Sony HCD-GPX3G Service Manual ▷ View online
HCD-GPX3G
17
SECTION 4
ELECTRICAL ADJUSTMENTS
Note:
1. CD Block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
1. CD Block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
ed.
3. Use an oscilloscope with more than 10 M
impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specifi ed value with the following checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
+
–
BD76 board
oscilloscope
(DC range)
CL102 (RFOUT)
CL117 (VREF)
Procedure:
1. Connect the oscilloscope to CL102 (RFOUT) and CL117
1. Connect the oscilloscope to CL102 (RFOUT) and CL117
(VREF) on the BD76 board.
2. Press
the
[
?/1
] button to turn the power on, and press the [CD]
button to select CD function.
3. Set disc (YEDS-18) and press the [
u
] button to playback.
4. Confi rm that oscilloscope waveform is as shown in the fi gure
below (eye pattern).
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.1 ± 0.4 Vp-p
Checking Location:
– BD76 Board (Side B) –
– BD76 Board (Side B) –
CL102
(RFOUT)
CL117
(VREF)
IC101
CD SECTION
FM AUTO STOP CHECK
Procedure:
1. Turn the power on.
2. Input the following signal from Signal Generator to FM an-
1. Turn the power on.
2. Input the following signal from Signal Generator to FM an-
tenna input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation
Deviation
: 75 kHz
Modulation
: 1 kHz
ANT input
: 35 dBu (EMF)
Note: Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with
automatic scanning.
4. Confi rm that input Frequency of A, B and C detected and auto-
matic scanning stops.
The stop of automatic scanning means “The station signal is re-
ceived in good condition”.
ceived in good condition”.
signal
generator
set
+
–
75
:
TUNER SECTION
0 dB = 1
V
HCD-GPX3G
18
SECTION 5
DIAGRAMS
• Circuit Boards Location
REGULATOR, SWITCHING
DISPLAY board
USB board
VOLUME board
2CH DAMP board
TUNER1AM3R board
BD76 board
LOADING board
HCD-GPX3G
HCD-GPX3G
19
19
5-1. BLOCK DIAGRAM –CD/USB Section –
OPTICAL PICK-UP BLOCK
(DA11MMVGP)
B
C
D
D
E
A
F
SP+
SP-
LD
MD
VREF
AUTOMATIC
POWER
CONTROL
Q201
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC301
VO1+
2
VO1-
1
IN1 3
SL+
SL-
VO2+
11
VO2-
12
IN2’ 9
T+
T-
VO3+
18
VO3-
17
IN3’ 20
F+
F-
VO4+
26
VO4-
27
IN4’ 24
MUTE 7
7 BIN
6 CIN
8 DIN
6 CIN
8 DIN
EIN
5 AIN
14
13
FIN
18 LDD
LDS
11 VREF
25 SPDO
19
24 SLDO
23 TDO
22 FDO
XOUT
XIN
X101
16.934MHz
S001
(LIMIT)
72
73
LIMIT-SW 32
LCHO
CD/USB-L
76
RCHO
R-ch
78
37 UHD-
38 UHD+
6 CF1
VBUS+5V
7 CF2
URX1 44
DBGP2 25
DBGP1 24
DBGP0 23
P71 47
RES 2
SI0 10
SO0 9
SCK0 11
P16 15
LRCK 28
BCLK 27
SDAT 26
SDAT 26
P20 32
P70 46
P24 33
P22 31
P70 46
P24 33
P22 31
UTX1 45
STREQ
33
STCK
34
STDATA
35
PCMLRSY
62
USB-TXD
24
USB-RXD
22
USB-SLEEP
38
RESB 47
CD-RST
41
CD-M-MUTE
USB-RST
43
CD-CLK
37
CD-CE
42
CD-DO
36 CD-DI
35
A
SFT-DEBUG 1
SFT-DEBUG 4
SFT-DEBUG 3
SFT-DEBUG 4
SFT-DEBUG 3
31
34
33
34
33
3
D+
D-
CN1000
X901
12MHz
2
1
4
MAIN
Section
(Page 20)
SYSTEM CONTROL
IC501 (1/3)
63 PCMBCK
64 PCMDATA
65 PCMREQ
64 PCMDATA
65 PCMREQ
44
CL
43
CE
46
DO
45
DI
2
CN500
(PROGRAMMING)
3
CN901
FLASH
PROGRAMMING
( )
5
8
8
7
5
7
5
9
DBGP0
DBGP1
DBGP2
DBGP1
DBGP2
TRESET
RESET
B
DISPLAY/POWER
Section
(Page 21)
23
BIAS
CD-MP3 PROCESSOR
IC101
40
6LJQDOSDWK
: AUDIO
5FKLVRPLWWHGGXHWRVDPHDV/FK
: CD
: USB
(USB)
SFT-DEBUG 2 32
CNVSS 9
6
7
7
CD MECHANISM DECK
(CDM76B-D1BD76)
M-
OPEN SW
M+
CLOSE SW
CD-M+
23
9
RIN
MOTOR
CONTROL
Q518
2 OUT2
4 OUT1
LOADING MOTOR DRIVE
IC505
CD-M-
25
7
FIN
1
VREF
MTR-OPEN
27
MTR-CLOSE
28
USB CONTROL
IC901
HCD-GPX3G
HCD-GPX3G
20
20
5-2. BLOCK DIAGRAM –MAIN Section –
29
R-ch
INPUT SELECTOR
IC800
SYSTEM CONTROL
IC501 (2/3)
CD/USB-L
1 CDMP3-R
CDMP3-L
DVD-L
ST-L
17
14
OUT 2
OUT 1
56
AMP-OCP
28
J801
AM/FM-DET,OSC,MIX,PLL,IF AMP
IC101
L101
X101
32.768kHz
TV/
DVD/
SAT
ANTENNA
FM/AM
CN103
FM
AM
AM
3
2
1
FRF1
ARF2
ARF1
2 DVD-R
31
LOUT
ROUT
X1
X2
4
7
6
39 ST-R
CLOCK
DATA
AUDIO-DATA
AUDIO-CLK
ST-RDS
ST-CLK
ST-DATA
15 16
50
51
48
47
15
14
FL101
BAND-PASS
FILTER
IIC/RDSI
8
CK
10
DA
13
18
19
CD/USB
Section
(Page 19)
6LJQDOSDWK
: AUDIO
: FM/AM
52
AMP-CLK
26
FAN-LOCK
CLOCK
IC1411
TB4001
3
2
14
11
POWER AMP
IC1408
3
5
IN
HO
CSD
LO
PROTECTION
Q1445,1456
TH1402
RESET
SWITCH
Q1416
MUTE
SWITCH
Q805
CEC DATA SWITCH
Q1411
14
11
POWER AMP
IC1409
3
5
IN
HO
CSD
LO
PROTECTION
Q1446,1457
TH1403
FRONT
SPEAKERS
,03('$1&(86(ȍ
R
L
RESET
SWITCH
Q1417
CEC DATA SWITCH
Q1410
PREAMP
IC1404
1
7
2
5
AOUT
INA-
INB+
BOUT
DC FAN
FAN MOTOR LOCK
Q1447
FAN MOTOR DRIVE
Q1439, Q1441,
Q1451, Q1453,
Q1458
D1435
D1403
57
53
PROTECTION
Q1448
PROTECTION
Q1449
OTP DRIVE
Q1469, 1470
SD-SLOW DRIVE
Q1474
SWITCH
DRIVER
Q1407
MUTE
DRIVE
Q517
COMPARATOR
IC1405
2
1
45
7
5
1
3
AOUT
INA+
INB+
BOUT
OUT
IN
FR
T-MUTE
FAN-DRIVE
SWITCH
DRIVER
Q1479
BOOSTER
Q1420
BOOSTER
Q1421
BOOSTER
Q1424
BOOSTER
Q1425
D1417
TV-L
30
TV-R
40
PC/
GAME
AUDIO
IN
L
R
4 SAOUT
POWER
ILLUMINATOR
CONTROL
Q803,D801
VACS
CONTROL
Q525,D520
VACS
66
ILLUM
65
58
AMP-RST
55
/SD-SLOW
18
BB11
19
BB21
DBFB CTL
Q804
13
BB22
12
BB12
DBFB CTL
Q806
AMP-RST
DISPLAY/
POWER
Section
(Page 21)
+
A
C
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