Sony HCD-GPX5G / HCD-GPX7G / HCD-GPX8G Service Manual ▷ View online
HCD-GPX5G/GPX7G/GPX8G
21
1.
Defect of AMP circuit
1-1. If PROTECT mode is “AMPLIFIER”,
The following defect might be possible.
Defects
Possible cause
OTP (Over Tempera-
ture Protection)
Unusual heat up of MOSFET by im-
proper assembly of heatsink, destruction
of MOSFET etc..
proper assembly of heatsink, destruction
of MOSFET etc..
DC Detection
DC appears in SP terminal by defect of
AMP IC and MOSFET or output is short-
circuit.
AMP IC and MOSFET or output is short-
circuit.
Unusual output of
Power mount
The power mount has unusual output.
1-2. If speaker does not have output even if the set status is not
in PROTECT mode
The following defect might be possible.
Defects
Possible cause
Under Voltage
IC1402 output is below 12V.
RESET defect
Reset signal status from micom is not ‘H’.
2.
Defect of power supply circuit to AMP
2-1. If the PROTECT mode is “POWER SUPPLY”,
There is possibility of unusual power supply of any of the
AMP IC or Pre-amplifi er.
• To release from this mode.
Press
[
u
] button and [
x
] button simultaneously
again or unplug and re-plug in the power cord.
HCD-GPX5G/GPX7G/GPX8G
22
CD SECTION
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 MΩ impedance.
4. Clean the object lens by an applicator with neutral detergent when the
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
Procedure :
1. Connect the oscilloscope to CN507 pin 6 (RFMON) and
1. Connect the oscilloscope to CN507 pin 6 (RFMON) and
CN507 pin 3 (GND) on the DMB22 board.
2. Press
the
[
?/1
STANDBY] button to turn the power on, and
press the [CD/DISC SKIP] 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
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.
Checking Location:
-DMB22 Board (SideA)-
-DMB22 Board (SideA)-
+
–
DMB22 board
oscilloscope
(DC range)
CN507 pin 6 (RFMON)
CN507 pin 3 (GND)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.05 ± 0.45 Vp-p
SECTION 4
ELECTRICAL CHECK
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.
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
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”.
TUNER SECTION
0 dB = 1
μV
signal
generator
set
+
–
75
CN507
pin 3
(GND)
(GND)
pin 6
(RFMON)
(RFMON)
IC501
IC504
HCD-GPX5G/GPX7G/GPX8G
HCD-GPX5G/GPX7G/GPX8G
23
23
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM – CD/USB Section –
A
B
DEVICE, OPTICAL
RF AMP, SERVO DSP,
AUDIO PROCESSOR
IC501
SYSTEM
CONTROLLER
IC500 (1/4)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC801
AUTOMATIC POWER
CONTROL
Q606
RF IP
123
RF_C
1
RF_B
128
RF_A
127
RF_D
2
RF
VOA/A
VOB/B
VOC/C
VOD/D
RF_F
4
VOE/E+G
RF_E
3
VOF/F+H
V2O
10
VC
LDO1
14
LD (780)
AUTOMATIC POWER
CONTROL
Q605
LDO2
15
LD (650)
FOO
22
CD ON
SWITCH
Q604-1
CD ON
SWITCH
Q604-2
VR (780)
MSW
20
VR (650)
FCS+
MSW
MDI1
13
PD
Q603
64M SDRAM
IC504
X501
27MHz
6
FCS–
7
24
TRO
21
TRK+
9
TRK–
8
23
FMO
18
SL+
10
SL–
11
22
DMO
17
SP+
12
SP–
13
39
2
29
21
SPFG/OPINN
126
27
DG0, DQ1 – DQ15
RD0 – RD15
PRST #
A0 – A11
RA0 – RA11
2, 4, 5, 7, 8, 10, 11, 13, 42,
44, 45, 47, 48, 50, 51, 53
52 – 55, 57 – 60,
69 - 62
90 - 92, 79 - 74,
88, 73
23 – 26,
29 – 34, 22, 35
XT
ALI
7
BA0
BA0
85
20
BA1
BA1
86
21
RCLK
CLK
72
38
DQM0
LDQM
61
15
DQM1
UDQM
70
39
RAS#
RAS
83
18
CAS#
CAS
82
17
RW
E
#
W
E
80
16
MUTE123
45
33
MUTE4
19
34
23
35
38
REGO2
REGO1
REGO2
REGO1
(CMS-S76RFS3G)
XT
ALO
8
USB CONTROLLER
IC700
31 USBUP_DP
30 USBUP_DM
USB_DP 25
USB_DM 24
2
USBDN1_DP
1
USBDN1_DM
28
HUB-OC2
CN1201
3
2
1
D+
D–
84
HUB-OC1
VBUS
USB
COMPARATOR
IC702
4
USBDN2_DP
3
USBDN2_DM
3
2
1
D+
D–
VBUS
MTK-RST
40
MTK-OSD
35
MTK-SI
36
MTK-CLK
37
MTK-XIFCS
41
MTK-BUSY
38
IFSDI 40
IFSDO 35
IFSCK 34
IFCS# 42
IFBSY 41
HUB-RESET
83
HUB-VBUS-DETECT
82
VBUS_DET
27
RESET_N
26
X700
24MHz
XTAL1/
CLKIN
CLKIN
33
XTAL2
32
VBUS +5V
PLAY
CN1202
OPOUT
124
1
7
3
5
SF_CS#
CS_
30
1
SF_CK
SCK
33
6
FLASH ROM
IC502
SO
2
SI
5
SF_DO 31
SF_DI 32
ACLK
ALRCK
ABCK
ADIN
118
L-OUT
ASDATA0
113
14
13
A/D CONVERTER
IC721
8
L-IN
R-CH
117
7
112
6
106
9
VOUT L
8
7
VOUT L
D/A CONVERTER
IC763
2 DATA
1 BCK
3 LRCK
16 SCK
23
27
DSP
IC762
11
22
19
21
25
23
24
13
ASYNCHRONOUS SAMPLE
RATE CONVERTER
IC761
4
14
7
MULTIPLEXER
IC741
6
5
R-CH
25
27 47 48
32 15 16
SDIN1
SDA1
SCL1
LRCK
MCLKO
SCLKOUT1
SCLKOUT2
SDOUT1
/RESET
2 RCKI
SDIN
/RST
SDOUT
LRCKO
BCKO
1C0
1C1
1Y
A
SCKI
LRCK
BCK
DOUT
VINL
VINR
ASEL
DSP-DA
TA
DSP-CLK
DSP-RESET
A
REC/PLAY
B
VO1+
VO1-
VO1-
VO2-
VO2+
VO3+
VO3-
VO4+
VO4-
VO4-
IN1
IN2
IN3
IN4
VSPDL
MUTE123
MUTE4
TSDM
OPIN-
REGVAR
REG5
TSD_M
(Page 24)
(Page 24)
: CD PLAY
: AUDIO
: USB
SIGNAL PATH
R-ch is omitted due to same as L-ch.
HCD-GPX5G/GPX7G/GPX8G
HCD-GPX5G/GPX7G/GPX8G
24
24
5-2. BLOCK DIAGRAM – MAIN Section –
TUNER (FM/AM)
IC101
FRF1
ARF1
LOUT
ROUT
DA
R-CH
CK
ANTENNA
FM/AM
RDSI
75
ST
-RDS
42 ST-L
15
14
21
DA
TA
22
CLK
46 MIC
26
OUTL
39 GAME_L
77
ST
-DATA
78
ST
-CLK
AUDIO DA
TA
86
AUDIO CLK
87
MIC DETECT
18
25
SWOUT
28
BB1L
38
INGAIN OUT L
27
BB2L
BASS AGC
Q900
INPUT SELECTOR,
ELECTRICAL VOLUME
IC806
SYSTEM CONTROLLER
IC500 (2/4)
: AUDIO
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: TUNER (FM/AM)
J1300
MIC IN
RV1300
MIC LEVEL
MIN MAX
MIC AMP
IC1301
L-OUT
L-IN
OUTL
SW OUT L
BASS AGC
: MIC
1
3
7
5
(Page 23)
13
X-OUT
15
X-IN
X701
8MHz
11
XC-OUT
10
XC-IN
X702
32.768kHz
(Page 23)
(Page 25)
(Page 25)
(Page 25)
1
3
OP AMP
IC901
4
6
13
10
8
A
E
D
C
B
MIC DRIVE
Q1302,Q1301
AUDIO IN
R-CH
43 GAME-LEFT
R
L
J500
PC/
GAME
R-CH
45 DVD LEFT
R-CH
DVD/
SAT
TV
40 TV LEFT
FRF2
7
CN103
R-CH
5
INGAIN OUT R
19
OUTR
18
BB1R
17
BB2R
BASS AGC
Q950
R-CH
20
AGCOUTR
23
R-CH
AGCOUTL
M
FIN
RIN
OUT2
OUT1
M751
(LOADING)
M
FIN
RIN
OUT2
OUT1
M741
(TABLE)
52
44
43
TABLE ADDRESS SENSOR
IC731
LD MOTOR DRIVER
IC701
3
7
9
2
4
TBL MOTOR DRIVER
IC712
RE701
ROTARY ENCORDER
7
9
2
4
LM-F
LM-R
46
45
TM-F
TM-R
49
50
E-1
E-2
51 E-3
53
ADDRESS SENSOR
SWITCH
Q731
TBL-SENS
(DISK TRAY ADDRESS DETECT)
S751
(OPEN/CLOSE DETECT)
22
FR-SPK-LED-RED
24
LED
DRIVER
Q707
D1800
(RED)
D1801
(BLUE)
3
4
LED
DRIVER
Q704
28
30
LED
DRIVER
Q709
D001
(R,G,B)
D001
(R,G,B)
FR-SPK-LED-BLUE
FR-SPK-LED-GREEN
SW-SPK-LED-GREEN
SW-SPK-LED-RED
SW-SPK-LED-BLUE
GPX7G/GPX8G
GPX7G
GPX7G
GPX8G
GPX7G/GPX8G
HIGH SPAKER (L,R)
FRONT SPAKER (L,R)
SUBWOOFER (L,R)
LOW SPAKER (L,R)
OPEN SW
19 X2
18 X1
X101
32.768kHz
D1800
(RED)
D1801
(BLUE)
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